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-rw-r--r--lib/CodeGen/AsmPrinter/AsmPrinter.cpp1724
-rw-r--r--lib/CodeGen/AsmPrinter/CMakeLists.txt10
-rw-r--r--lib/CodeGen/AsmPrinter/DIE.cpp518
-rw-r--r--lib/CodeGen/AsmPrinter/DIE.h549
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfDebug.cpp2610
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfDebug.h561
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfException.cpp706
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfException.h178
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfLabel.cpp35
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfLabel.h56
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfPrinter.cpp235
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfPrinter.h153
-rw-r--r--lib/CodeGen/AsmPrinter/DwarfWriter.cpp129
-rw-r--r--lib/CodeGen/AsmPrinter/Makefile15
-rw-r--r--lib/CodeGen/AsmPrinter/OcamlGCPrinter.cpp160
15 files changed, 7639 insertions, 0 deletions
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
new file mode 100644
index 0000000..45462da
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -0,0 +1,1724 @@
+//===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the AsmPrinter class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Constants.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/GCMetadataPrinter.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include <cerrno>
+using namespace llvm;
+
+static cl::opt<cl::boolOrDefault>
+AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
+ cl::init(cl::BOU_UNSET));
+
+char AsmPrinter::ID = 0;
+AsmPrinter::AsmPrinter(raw_ostream &o, TargetMachine &tm,
+ const TargetAsmInfo *T, CodeGenOpt::Level OL, bool VDef)
+ : MachineFunctionPass(&ID), FunctionNumber(0), OptLevel(OL), O(o),
+ TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
+ IsInTextSection(false)
+{
+ switch (AsmVerbose) {
+ case cl::BOU_UNSET: VerboseAsm = VDef; break;
+ case cl::BOU_TRUE: VerboseAsm = true; break;
+ case cl::BOU_FALSE: VerboseAsm = false; break;
+ }
+}
+
+AsmPrinter::~AsmPrinter() {
+ for (gcp_iterator I = GCMetadataPrinters.begin(),
+ E = GCMetadataPrinters.end(); I != E; ++I)
+ delete I->second;
+}
+
+/// SwitchToTextSection - Switch to the specified text section of the executable
+/// if we are not already in it!
+///
+void AsmPrinter::SwitchToTextSection(const char *NewSection,
+ const GlobalValue *GV) {
+ std::string NS;
+ if (GV && GV->hasSection())
+ NS = TAI->getSwitchToSectionDirective() + GV->getSection();
+ else
+ NS = NewSection;
+
+ // If we're already in this section, we're done.
+ if (CurrentSection == NS) return;
+
+ // Close the current section, if applicable.
+ if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
+ O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
+
+ CurrentSection = NS;
+
+ if (!CurrentSection.empty())
+ O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
+
+ IsInTextSection = true;
+}
+
+/// SwitchToDataSection - Switch to the specified data section of the executable
+/// if we are not already in it!
+///
+void AsmPrinter::SwitchToDataSection(const char *NewSection,
+ const GlobalValue *GV) {
+ std::string NS;
+ if (GV && GV->hasSection())
+ NS = TAI->getSwitchToSectionDirective() + GV->getSection();
+ else
+ NS = NewSection;
+
+ // If we're already in this section, we're done.
+ if (CurrentSection == NS) return;
+
+ // Close the current section, if applicable.
+ if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
+ O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
+
+ CurrentSection = NS;
+
+ if (!CurrentSection.empty())
+ O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
+
+ IsInTextSection = false;
+}
+
+/// SwitchToSection - Switch to the specified section of the executable if we
+/// are not already in it!
+void AsmPrinter::SwitchToSection(const Section* NS) {
+ const std::string& NewSection = NS->getName();
+
+ // If we're already in this section, we're done.
+ if (CurrentSection == NewSection) return;
+
+ // Close the current section, if applicable.
+ if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
+ O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
+
+ // FIXME: Make CurrentSection a Section* in the future
+ CurrentSection = NewSection;
+ CurrentSection_ = NS;
+
+ if (!CurrentSection.empty()) {
+ // If section is named we need to switch into it via special '.section'
+ // directive and also append funky flags. Otherwise - section name is just
+ // some magic assembler directive.
+ if (NS->isNamed())
+ O << TAI->getSwitchToSectionDirective()
+ << CurrentSection
+ << TAI->getSectionFlags(NS->getFlags());
+ else
+ O << CurrentSection;
+ O << TAI->getDataSectionStartSuffix() << '\n';
+ }
+
+ IsInTextSection = (NS->getFlags() & SectionFlags::Code);
+}
+
+void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
+ MachineFunctionPass::getAnalysisUsage(AU);
+ AU.addRequired<GCModuleInfo>();
+}
+
+bool AsmPrinter::doInitialization(Module &M) {
+ Mang = new Mangler(M, TAI->getGlobalPrefix(), TAI->getPrivateGlobalPrefix());
+
+ GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
+ assert(MI && "AsmPrinter didn't require GCModuleInfo?");
+
+ if (TAI->hasSingleParameterDotFile()) {
+ /* Very minimal debug info. It is ignored if we emit actual
+ debug info. If we don't, this at helps the user find where
+ a function came from. */
+ O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
+ }
+
+ for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
+ if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
+ MP->beginAssembly(O, *this, *TAI);
+
+ if (!M.getModuleInlineAsm().empty())
+ O << TAI->getCommentString() << " Start of file scope inline assembly\n"
+ << M.getModuleInlineAsm()
+ << '\n' << TAI->getCommentString()
+ << " End of file scope inline assembly\n";
+
+ SwitchToDataSection(""); // Reset back to no section.
+
+ MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
+ if (MMI) MMI->AnalyzeModule(M);
+ DW = getAnalysisIfAvailable<DwarfWriter>();
+ return false;
+}
+
+bool AsmPrinter::doFinalization(Module &M) {
+ if (TAI->getWeakRefDirective()) {
+ if (!ExtWeakSymbols.empty())
+ SwitchToDataSection("");
+
+ for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
+ e = ExtWeakSymbols.end(); i != e; ++i)
+ O << TAI->getWeakRefDirective() << Mang->getValueName(*i) << '\n';
+ }
+
+ if (TAI->getSetDirective()) {
+ if (!M.alias_empty())
+ SwitchToSection(TAI->getTextSection());
+
+ O << '\n';
+ for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
+ I!=E; ++I) {
+ std::string Name = Mang->getValueName(I);
+ std::string Target;
+
+ const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
+ Target = Mang->getValueName(GV);
+
+ if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
+ O << "\t.globl\t" << Name << '\n';
+ else if (I->hasWeakLinkage())
+ O << TAI->getWeakRefDirective() << Name << '\n';
+ else if (!I->hasLocalLinkage())
+ assert(0 && "Invalid alias linkage");
+
+ printVisibility(Name, I->getVisibility());
+
+ O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
+ }
+ }
+
+ GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
+ assert(MI && "AsmPrinter didn't require GCModuleInfo?");
+ for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
+ if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
+ MP->finishAssembly(O, *this, *TAI);
+
+ // If we don't have any trampolines, then we don't require stack memory
+ // to be executable. Some targets have a directive to declare this.
+ Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
+ if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
+ if (TAI->getNonexecutableStackDirective())
+ O << TAI->getNonexecutableStackDirective() << '\n';
+
+ delete Mang; Mang = 0;
+ return false;
+}
+
+const std::string &
+AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF,
+ std::string &Name) const {
+ assert(MF && "No machine function?");
+ Name = MF->getFunction()->getName();
+ if (Name.empty())
+ Name = Mang->getValueName(MF->getFunction());
+ Name = Mang->makeNameProper(TAI->getEHGlobalPrefix() +
+ Name + ".eh", TAI->getGlobalPrefix());
+ return Name;
+}
+
+void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
+ // What's my mangled name?
+ CurrentFnName = Mang->getValueName(MF.getFunction());
+ IncrementFunctionNumber();
+}
+
+namespace {
+ // SectionCPs - Keep track the alignment, constpool entries per Section.
+ struct SectionCPs {
+ const Section *S;
+ unsigned Alignment;
+ SmallVector<unsigned, 4> CPEs;
+ SectionCPs(const Section *s, unsigned a) : S(s), Alignment(a) {};
+ };
+}
+
+/// EmitConstantPool - Print to the current output stream assembly
+/// representations of the constants in the constant pool MCP. This is
+/// used to print out constants which have been "spilled to memory" by
+/// the code generator.
+///
+void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
+ const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
+ if (CP.empty()) return;
+
+ // Calculate sections for constant pool entries. We collect entries to go into
+ // the same section together to reduce amount of section switch statements.
+ SmallVector<SectionCPs, 4> CPSections;
+ for (unsigned i = 0, e = CP.size(); i != e; ++i) {
+ MachineConstantPoolEntry CPE = CP[i];
+ unsigned Align = CPE.getAlignment();
+ const Section* S = TAI->SelectSectionForMachineConst(CPE.getType());
+ // The number of sections are small, just do a linear search from the
+ // last section to the first.
+ bool Found = false;
+ unsigned SecIdx = CPSections.size();
+ while (SecIdx != 0) {
+ if (CPSections[--SecIdx].S == S) {
+ Found = true;
+ break;
+ }
+ }
+ if (!Found) {
+ SecIdx = CPSections.size();
+ CPSections.push_back(SectionCPs(S, Align));
+ }
+
+ if (Align > CPSections[SecIdx].Alignment)
+ CPSections[SecIdx].Alignment = Align;
+ CPSections[SecIdx].CPEs.push_back(i);
+ }
+
+ // Now print stuff into the calculated sections.
+ for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
+ SwitchToSection(CPSections[i].S);
+ EmitAlignment(Log2_32(CPSections[i].Alignment));
+
+ unsigned Offset = 0;
+ for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
+ unsigned CPI = CPSections[i].CPEs[j];
+ MachineConstantPoolEntry CPE = CP[CPI];
+
+ // Emit inter-object padding for alignment.
+ unsigned AlignMask = CPE.getAlignment() - 1;
+ unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
+ EmitZeros(NewOffset - Offset);
+
+ const Type *Ty = CPE.getType();
+ Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
+
+ O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
+ << CPI << ":\t\t\t\t\t";
+ if (VerboseAsm) {
+ O << TAI->getCommentString() << ' ';
+ WriteTypeSymbolic(O, CPE.getType(), 0);
+ }
+ O << '\n';
+ if (CPE.isMachineConstantPoolEntry())
+ EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
+ else
+ EmitGlobalConstant(CPE.Val.ConstVal);
+ }
+ }
+}
+
+/// EmitJumpTableInfo - Print assembly representations of the jump tables used
+/// by the current function to the current output stream.
+///
+void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
+ MachineFunction &MF) {
+ const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
+ if (JT.empty()) return;
+
+ bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
+
+ // Pick the directive to use to print the jump table entries, and switch to
+ // the appropriate section.
+ TargetLowering *LoweringInfo = TM.getTargetLowering();
+
+ const char* JumpTableDataSection = TAI->getJumpTableDataSection();
+ const Function *F = MF.getFunction();
+ unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
+ if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
+ !JumpTableDataSection ||
+ SectionFlags & SectionFlags::Linkonce) {
+ // In PIC mode, we need to emit the jump table to the same section as the
+ // function body itself, otherwise the label differences won't make sense.
+ // We should also do if the section name is NULL or function is declared in
+ // discardable section.
+ SwitchToSection(TAI->SectionForGlobal(F));
+ } else {
+ SwitchToDataSection(JumpTableDataSection);
+ }
+
+ EmitAlignment(Log2_32(MJTI->getAlignment()));
+
+ for (unsigned i = 0, e = JT.size(); i != e; ++i) {
+ const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
+
+ // If this jump table was deleted, ignore it.
+ if (JTBBs.empty()) continue;
+
+ // For PIC codegen, if possible we want to use the SetDirective to reduce
+ // the number of relocations the assembler will generate for the jump table.
+ // Set directives are all printed before the jump table itself.
+ SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
+ if (TAI->getSetDirective() && IsPic)
+ for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
+ if (EmittedSets.insert(JTBBs[ii]))
+ printPICJumpTableSetLabel(i, JTBBs[ii]);
+
+ // On some targets (e.g. darwin) we want to emit two consequtive labels
+ // before each jump table. The first label is never referenced, but tells
+ // the assembler and linker the extents of the jump table object. The
+ // second label is actually referenced by the code.
+ if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
+ O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
+
+ O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << i << ":\n";
+
+ for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
+ printPICJumpTableEntry(MJTI, JTBBs[ii], i);
+ O << '\n';
+ }
+ }
+}
+
+void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
+ const MachineBasicBlock *MBB,
+ unsigned uid) const {
+ bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
+
+ // Use JumpTableDirective otherwise honor the entry size from the jump table
+ // info.
+ const char *JTEntryDirective = TAI->getJumpTableDirective();
+ bool HadJTEntryDirective = JTEntryDirective != NULL;
+ if (!HadJTEntryDirective) {
+ JTEntryDirective = MJTI->getEntrySize() == 4 ?
+ TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
+ }
+
+ O << JTEntryDirective << ' ';
+
+ // If we have emitted set directives for the jump table entries, print
+ // them rather than the entries themselves. If we're emitting PIC, then
+ // emit the table entries as differences between two text section labels.
+ // If we're emitting non-PIC code, then emit the entries as direct
+ // references to the target basic blocks.
+ if (IsPic) {
+ if (TAI->getSetDirective()) {
+ O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
+ << '_' << uid << "_set_" << MBB->getNumber();
+ } else {
+ printBasicBlockLabel(MBB, false, false, false);
+ // If the arch uses custom Jump Table directives, don't calc relative to
+ // JT
+ if (!HadJTEntryDirective)
+ O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
+ << getFunctionNumber() << '_' << uid;
+ }
+ } else {
+ printBasicBlockLabel(MBB, false, false, false);
+ }
+}
+
+
+/// EmitSpecialLLVMGlobal - Check to see if the specified global is a
+/// special global used by LLVM. If so, emit it and return true, otherwise
+/// do nothing and return false.
+bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
+ if (GV->getName() == "llvm.used") {
+ if (TAI->getUsedDirective() != 0) // No need to emit this at all.
+ EmitLLVMUsedList(GV->getInitializer());
+ return true;
+ }
+
+ // Ignore debug and non-emitted data.
+ if (GV->getSection() == "llvm.metadata" ||
+ GV->hasAvailableExternallyLinkage())
+ return true;
+
+ if (!GV->hasAppendingLinkage()) return false;
+
+ assert(GV->hasInitializer() && "Not a special LLVM global!");
+
+ const TargetData *TD = TM.getTargetData();
+ unsigned Align = Log2_32(TD->getPointerPrefAlignment());
+ if (GV->getName() == "llvm.global_ctors") {
+ SwitchToDataSection(TAI->getStaticCtorsSection());
+ EmitAlignment(Align, 0);
+ EmitXXStructorList(GV->getInitializer());
+ return true;
+ }
+
+ if (GV->getName() == "llvm.global_dtors") {
+ SwitchToDataSection(TAI->getStaticDtorsSection());
+ EmitAlignment(Align, 0);
+ EmitXXStructorList(GV->getInitializer());
+ return true;
+ }
+
+ return false;
+}
+
+/// findGlobalValue - if CV is an expression equivalent to a single
+/// global value, return that value.
+const GlobalValue * AsmPrinter::findGlobalValue(const Constant *CV) {
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
+ return GV;
+ else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
+ const TargetData *TD = TM.getTargetData();
+ unsigned Opcode = CE->getOpcode();
+ switch (Opcode) {
+ case Instruction::GetElementPtr: {
+ const Constant *ptrVal = CE->getOperand(0);
+ SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
+ if (TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], idxVec.size()))
+ return 0;
+ return findGlobalValue(ptrVal);
+ }
+ case Instruction::BitCast:
+ return findGlobalValue(CE->getOperand(0));
+ default:
+ return 0;
+ }
+ }
+ return 0;
+}
+
+/// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
+/// global in the specified llvm.used list for which emitUsedDirectiveFor
+/// is true, as being used with this directive.
+
+void AsmPrinter::EmitLLVMUsedList(Constant *List) {
+ const char *Directive = TAI->getUsedDirective();
+
+ // Should be an array of 'sbyte*'.
+ ConstantArray *InitList = dyn_cast<ConstantArray>(List);
+ if (InitList == 0) return;
+
+ for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
+ const GlobalValue *GV = findGlobalValue(InitList->getOperand(i));
+ if (TAI->emitUsedDirectiveFor(GV, Mang)) {
+ O << Directive;
+ EmitConstantValueOnly(InitList->getOperand(i));
+ O << '\n';
+ }
+ }
+}
+
+/// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
+/// function pointers, ignoring the init priority.
+void AsmPrinter::EmitXXStructorList(Constant *List) {
+ // Should be an array of '{ int, void ()* }' structs. The first value is the
+ // init priority, which we ignore.
+ if (!isa<ConstantArray>(List)) return;
+ ConstantArray *InitList = cast<ConstantArray>(List);
+ for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
+ if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
+ if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
+
+ if (CS->getOperand(1)->isNullValue())
+ return; // Found a null terminator, exit printing.
+ // Emit the function pointer.
+ EmitGlobalConstant(CS->getOperand(1));
+ }
+}
+
+/// getGlobalLinkName - Returns the asm/link name of of the specified
+/// global variable. Should be overridden by each target asm printer to
+/// generate the appropriate value.
+const std::string &AsmPrinter::getGlobalLinkName(const GlobalVariable *GV,
+ std::string &LinkName) const {
+ if (isa<Function>(GV)) {
+ LinkName += TAI->getFunctionAddrPrefix();
+ LinkName += Mang->getValueName(GV);
+ LinkName += TAI->getFunctionAddrSuffix();
+ } else {
+ LinkName += TAI->getGlobalVarAddrPrefix();
+ LinkName += Mang->getValueName(GV);
+ LinkName += TAI->getGlobalVarAddrSuffix();
+ }
+
+ return LinkName;
+}
+
+/// EmitExternalGlobal - Emit the external reference to a global variable.
+/// Should be overridden if an indirect reference should be used.
+void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
+ std::string GLN;
+ O << getGlobalLinkName(GV, GLN);
+}
+
+
+
+//===----------------------------------------------------------------------===//
+/// LEB 128 number encoding.
+
+/// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
+/// representing an unsigned leb128 value.
+void AsmPrinter::PrintULEB128(unsigned Value) const {
+ char Buffer[20];
+ do {
+ unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
+ Value >>= 7;
+ if (Value) Byte |= 0x80;
+ O << "0x" << utohex_buffer(Byte, Buffer+20);
+ if (Value) O << ", ";
+ } while (Value);
+}
+
+/// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
+/// representing a signed leb128 value.
+void AsmPrinter::PrintSLEB128(int Value) const {
+ int Sign = Value >> (8 * sizeof(Value) - 1);
+ bool IsMore;
+ char Buffer[20];
+
+ do {
+ unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
+ Value >>= 7;
+ IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
+ if (IsMore) Byte |= 0x80;
+ O << "0x" << utohex_buffer(Byte, Buffer+20);
+ if (IsMore) O << ", ";
+ } while (IsMore);
+}
+
+//===--------------------------------------------------------------------===//
+// Emission and print routines
+//
+
+/// PrintHex - Print a value as a hexidecimal value.
+///
+void AsmPrinter::PrintHex(int Value) const {
+ char Buffer[20];
+ O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
+}
+
+/// EOL - Print a newline character to asm stream. If a comment is present
+/// then it will be printed first. Comments should not contain '\n'.
+void AsmPrinter::EOL() const {
+ O << '\n';
+}
+
+void AsmPrinter::EOL(const std::string &Comment) const {
+ if (VerboseAsm && !Comment.empty()) {
+ O << '\t'
+ << TAI->getCommentString()
+ << ' '
+ << Comment;
+ }
+ O << '\n';
+}
+
+void AsmPrinter::EOL(const char* Comment) const {
+ if (VerboseAsm && *Comment) {
+ O << '\t'
+ << TAI->getCommentString()
+ << ' '
+ << Comment;
+ }
+ O << '\n';
+}
+
+/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
+/// unsigned leb128 value.
+void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
+ if (TAI->hasLEB128()) {
+ O << "\t.uleb128\t"
+ << Value;
+ } else {
+ O << TAI->getData8bitsDirective();
+ PrintULEB128(Value);
+ }
+}
+
+/// EmitSLEB128Bytes - print an assembler byte data directive to compose a
+/// signed leb128 value.
+void AsmPrinter::EmitSLEB128Bytes(int Value) const {
+ if (TAI->hasLEB128()) {
+ O << "\t.sleb128\t"
+ << Value;
+ } else {
+ O << TAI->getData8bitsDirective();
+ PrintSLEB128(Value);
+ }
+}
+
+/// EmitInt8 - Emit a byte directive and value.
+///
+void AsmPrinter::EmitInt8(int Value) const {
+ O << TAI->getData8bitsDirective();
+ PrintHex(Value & 0xFF);
+}
+
+/// EmitInt16 - Emit a short directive and value.
+///
+void AsmPrinter::EmitInt16(int Value) const {
+ O << TAI->getData16bitsDirective();
+ PrintHex(Value & 0xFFFF);
+}
+
+/// EmitInt32 - Emit a long directive and value.
+///
+void AsmPrinter::EmitInt32(int Value) const {
+ O << TAI->getData32bitsDirective();
+ PrintHex(Value);
+}
+
+/// EmitInt64 - Emit a long long directive and value.
+///
+void AsmPrinter::EmitInt64(uint64_t Value) const {
+ if (TAI->getData64bitsDirective()) {
+ O << TAI->getData64bitsDirective();
+ PrintHex(Value);
+ } else {
+ if (TM.getTargetData()->isBigEndian()) {
+ EmitInt32(unsigned(Value >> 32)); O << '\n';
+ EmitInt32(unsigned(Value));
+ } else {
+ EmitInt32(unsigned(Value)); O << '\n';
+ EmitInt32(unsigned(Value >> 32));
+ }
+ }
+}
+
+/// toOctal - Convert the low order bits of X into an octal digit.
+///
+static inline char toOctal(int X) {
+ return (X&7)+'0';
+}
+
+/// printStringChar - Print a char, escaped if necessary.
+///
+static void printStringChar(raw_ostream &O, unsigned char C) {
+ if (C == '"') {
+ O << "\\\"";
+ } else if (C == '\\') {
+ O << "\\\\";
+ } else if (isprint((unsigned char)C)) {
+ O << C;
+ } else {
+ switch(C) {
+ case '\b': O << "\\b"; break;
+ case '\f': O << "\\f"; break;
+ case '\n': O << "\\n"; break;
+ case '\r': O << "\\r"; break;
+ case '\t': O << "\\t"; break;
+ default:
+ O << '\\';
+ O << toOctal(C >> 6);
+ O << toOctal(C >> 3);
+ O << toOctal(C >> 0);
+ break;
+ }
+ }
+}
+
+/// EmitString - Emit a string with quotes and a null terminator.
+/// Special characters are emitted properly.
+/// \literal (Eg. '\t') \endliteral
+void AsmPrinter::EmitString(const std::string &String) const {
+ EmitString(String.c_str(), String.size());
+}
+
+void AsmPrinter::EmitString(const char *String, unsigned Size) const {
+ const char* AscizDirective = TAI->getAscizDirective();
+ if (AscizDirective)
+ O << AscizDirective;
+ else
+ O << TAI->getAsciiDirective();
+ O << '\"';
+ for (unsigned i = 0; i < Size; ++i)
+ printStringChar(O, String[i]);
+ if (AscizDirective)
+ O << '\"';
+ else
+ O << "\\0\"";
+}
+
+
+/// EmitFile - Emit a .file directive.
+void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
+ O << "\t.file\t" << Number << " \"";
+ for (unsigned i = 0, N = Name.size(); i < N; ++i)
+ printStringChar(O, Name[i]);
+ O << '\"';
+}
+
+
+//===----------------------------------------------------------------------===//
+
+// EmitAlignment - Emit an alignment directive to the specified power of
+// two boundary. For example, if you pass in 3 here, you will get an 8
+// byte alignment. If a global value is specified, and if that global has
+// an explicit alignment requested, it will unconditionally override the
+// alignment request. However, if ForcedAlignBits is specified, this value
+// has final say: the ultimate alignment will be the max of ForcedAlignBits
+// and the alignment computed with NumBits and the global.
+//
+// The algorithm is:
+// Align = NumBits;
+// if (GV && GV->hasalignment) Align = GV->getalignment();
+// Align = std::max(Align, ForcedAlignBits);
+//
+void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
+ unsigned ForcedAlignBits,
+ bool UseFillExpr) const {
+ if (GV && GV->getAlignment())
+ NumBits = Log2_32(GV->getAlignment());
+ NumBits = std::max(NumBits, ForcedAlignBits);
+
+ if (NumBits == 0) return; // No need to emit alignment.
+ if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
+ O << TAI->getAlignDirective() << NumBits;
+
+ unsigned FillValue = TAI->getTextAlignFillValue();
+ UseFillExpr &= IsInTextSection && FillValue;
+ if (UseFillExpr) {
+ O << ',';
+ PrintHex(FillValue);
+ }
+ O << '\n';
+}
+
+
+/// EmitZeros - Emit a block of zeros.
+///
+void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
+ if (NumZeros) {
+ if (TAI->getZeroDirective()) {
+ O << TAI->getZeroDirective() << NumZeros;
+ if (TAI->getZeroDirectiveSuffix())
+ O << TAI->getZeroDirectiveSuffix();
+ O << '\n';
+ } else {
+ for (; NumZeros; --NumZeros)
+ O << TAI->getData8bitsDirective(AddrSpace) << "0\n";
+ }
+ }
+}
+
+// Print out the specified constant, without a storage class. Only the
+// constants valid in constant expressions can occur here.
+void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
+ if (CV->isNullValue() || isa<UndefValue>(CV))
+ O << '0';
+ else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
+ O << CI->getZExtValue();
+ } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
+ // This is a constant address for a global variable or function. Use the
+ // name of the variable or function as the address value, possibly
+ // decorating it with GlobalVarAddrPrefix/Suffix or
+ // FunctionAddrPrefix/Suffix (these all default to "" )
+ if (isa<Function>(GV)) {
+ O << TAI->getFunctionAddrPrefix()
+ << Mang->getValueName(GV)
+ << TAI->getFunctionAddrSuffix();
+ } else {
+ O << TAI->getGlobalVarAddrPrefix()
+ << Mang->getValueName(GV)
+ << TAI->getGlobalVarAddrSuffix();
+ }
+ } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
+ const TargetData *TD = TM.getTargetData();
+ unsigned Opcode = CE->getOpcode();
+ switch (Opcode) {
+ case Instruction::GetElementPtr: {
+ // generate a symbolic expression for the byte address
+ const Constant *ptrVal = CE->getOperand(0);
+ SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
+ if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
+ idxVec.size())) {
+ // Truncate/sext the offset to the pointer size.
+ if (TD->getPointerSizeInBits() != 64) {
+ int SExtAmount = 64-TD->getPointerSizeInBits();
+ Offset = (Offset << SExtAmount) >> SExtAmount;
+ }
+
+ if (Offset)
+ O << '(';
+ EmitConstantValueOnly(ptrVal);
+ if (Offset > 0)
+ O << ") + " << Offset;
+ else if (Offset < 0)
+ O << ") - " << -Offset;
+ } else {
+ EmitConstantValueOnly(ptrVal);
+ }
+ break;
+ }
+ case Instruction::Trunc:
+ case Instruction::ZExt:
+ case Instruction::SExt:
+ case Instruction::FPTrunc:
+ case Instruction::FPExt:
+ case Instruction::UIToFP:
+ case Instruction::SIToFP:
+ case Instruction::FPToUI:
+ case Instruction::FPToSI:
+ assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
+ break;
+ case Instruction::BitCast:
+ return EmitConstantValueOnly(CE->getOperand(0));
+
+ case Instruction::IntToPtr: {
+ // Handle casts to pointers by changing them into casts to the appropriate
+ // integer type. This promotes constant folding and simplifies this code.
+ Constant *Op = CE->getOperand(0);
+ Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
+ return EmitConstantValueOnly(Op);
+ }
+
+
+ case Instruction::PtrToInt: {
+ // Support only foldable casts to/from pointers that can be eliminated by
+ // changing the pointer to the appropriately sized integer type.
+ Constant *Op = CE->getOperand(0);
+ const Type *Ty = CE->getType();
+
+ // We can emit the pointer value into this slot if the slot is an
+ // integer slot greater or equal to the size of the pointer.
+ if (TD->getTypeAllocSize(Ty) >= TD->getTypeAllocSize(Op->getType()))
+ return EmitConstantValueOnly(Op);
+
+ O << "((";
+ EmitConstantValueOnly(Op);
+ APInt ptrMask = APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Ty));
+
+ SmallString<40> S;
+ ptrMask.toStringUnsigned(S);
+ O << ") & " << S.c_str() << ')';
+ break;
+ }
+ case Instruction::Add:
+ case Instruction::Sub:
+ case Instruction::And:
+ case Instruction::Or:
+ case Instruction::Xor:
+ O << '(';
+ EmitConstantValueOnly(CE->getOperand(0));
+ O << ')';
+ switch (Opcode) {
+ case Instruction::Add:
+ O << " + ";
+ break;
+ case Instruction::Sub:
+ O << " - ";
+ break;
+ case Instruction::And:
+ O << " & ";
+ break;
+ case Instruction::Or:
+ O << " | ";
+ break;
+ case Instruction::Xor:
+ O << " ^ ";
+ break;
+ default:
+ break;
+ }
+ O << '(';
+ EmitConstantValueOnly(CE->getOperand(1));
+ O << ')';
+ break;
+ default:
+ assert(0 && "Unsupported operator!");
+ }
+ } else {
+ assert(0 && "Unknown constant value!");
+ }
+}
+
+/// printAsCString - Print the specified array as a C compatible string, only if
+/// the predicate isString is true.
+///
+static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
+ unsigned LastElt) {
+ assert(CVA->isString() && "Array is not string compatible!");
+
+ O << '\"';
+ for (unsigned i = 0; i != LastElt; ++i) {
+ unsigned char C =
+ (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
+ printStringChar(O, C);
+ }
+ O << '\"';
+}
+
+/// EmitString - Emit a zero-byte-terminated string constant.
+///
+void AsmPrinter::EmitString(const ConstantArray *CVA) const {
+ unsigned NumElts = CVA->getNumOperands();
+ if (TAI->getAscizDirective() && NumElts &&
+ cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
+ O << TAI->getAscizDirective();
+ printAsCString(O, CVA, NumElts-1);
+ } else {
+ O << TAI->getAsciiDirective();
+ printAsCString(O, CVA, NumElts);
+ }
+ O << '\n';
+}
+
+void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA,
+ unsigned AddrSpace) {
+ if (CVA->isString()) {
+ EmitString(CVA);
+ } else { // Not a string. Print the values in successive locations
+ for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
+ EmitGlobalConstant(CVA->getOperand(i), AddrSpace);
+ }
+}
+
+void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
+ const VectorType *PTy = CP->getType();
+
+ for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
+ EmitGlobalConstant(CP->getOperand(I));
+}
+
+void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
+ unsigned AddrSpace) {
+ // Print the fields in successive locations. Pad to align if needed!
+ const TargetData *TD = TM.getTargetData();
+ unsigned Size = TD->getTypeAllocSize(CVS->getType());
+ const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
+ uint64_t sizeSoFar = 0;
+ for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
+ const Constant* field = CVS->getOperand(i);
+
+ // Check if padding is needed and insert one or more 0s.
+ uint64_t fieldSize = TD->getTypeAllocSize(field->getType());
+ uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
+ - cvsLayout->getElementOffset(i)) - fieldSize;
+ sizeSoFar += fieldSize + padSize;
+
+ // Now print the actual field value.
+ EmitGlobalConstant(field, AddrSpace);
+
+ // Insert padding - this may include padding to increase the size of the
+ // current field up to the ABI size (if the struct is not packed) as well
+ // as padding to ensure that the next field starts at the right offset.
+ EmitZeros(padSize, AddrSpace);
+ }
+ assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
+ "Layout of constant struct may be incorrect!");
+}
+
+void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
+ unsigned AddrSpace) {
+ // FP Constants are printed as integer constants to avoid losing
+ // precision...
+ const TargetData *TD = TM.getTargetData();
+ if (CFP->getType() == Type::DoubleTy) {
+ double Val = CFP->getValueAPF().convertToDouble(); // for comment only
+ uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
+ if (TAI->getData64bitsDirective(AddrSpace)) {
+ O << TAI->getData64bitsDirective(AddrSpace) << i;
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString() << " double value: " << Val;
+ O << '\n';
+ } else if (TD->isBigEndian()) {
+ O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " double most significant word " << Val;
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " double least significant word " << Val;
+ O << '\n';
+ } else {
+ O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " double least significant word " << Val;
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " double most significant word " << Val;
+ O << '\n';
+ }
+ return;
+ } else if (CFP->getType() == Type::FloatTy) {
+ float Val = CFP->getValueAPF().convertToFloat(); // for comment only
+ O << TAI->getData32bitsDirective(AddrSpace)
+ << CFP->getValueAPF().bitcastToAPInt().getZExtValue();
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString() << " float " << Val;
+ O << '\n';
+ return;
+ } else if (CFP->getType() == Type::X86_FP80Ty) {
+ // all long double variants are printed as hex
+ // api needed to prevent premature destruction
+ APInt api = CFP->getValueAPF().bitcastToAPInt();
+ const uint64_t *p = api.getRawData();
+ // Convert to double so we can print the approximate val as a comment.
+ APFloat DoubleVal = CFP->getValueAPF();
+ bool ignored;
+ DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
+ &ignored);
+ if (TD->isBigEndian()) {
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double most significant halfword of ~"
+ << DoubleVal.convertToDouble();
+ O << '\n';
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString() << " long double next halfword";
+ O << '\n';
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString() << " long double next halfword";
+ O << '\n';
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString() << " long double next halfword";
+ O << '\n';
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double least significant halfword";
+ O << '\n';
+ } else {
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double least significant halfword of ~"
+ << DoubleVal.convertToDouble();
+ O << '\n';
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double next halfword";
+ O << '\n';
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double next halfword";
+ O << '\n';
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double next halfword";
+ O << '\n';
+ O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double most significant halfword";
+ O << '\n';
+ }
+ EmitZeros(TD->getTypeAllocSize(Type::X86_FP80Ty) -
+ TD->getTypeStoreSize(Type::X86_FP80Ty), AddrSpace);
+ return;
+ } else if (CFP->getType() == Type::PPC_FP128Ty) {
+ // all long double variants are printed as hex
+ // api needed to prevent premature destruction
+ APInt api = CFP->getValueAPF().bitcastToAPInt();
+ const uint64_t *p = api.getRawData();
+ if (TD->isBigEndian()) {
+ O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double most significant word";
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double next word";
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double next word";
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double least significant word";
+ O << '\n';
+ } else {
+ O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double least significant word";
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double next word";
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double next word";
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " long double most significant word";
+ O << '\n';
+ }
+ return;
+ } else assert(0 && "Floating point constant type not handled");
+}
+
+void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
+ unsigned AddrSpace) {
+ const TargetData *TD = TM.getTargetData();
+ unsigned BitWidth = CI->getBitWidth();
+ assert(isPowerOf2_32(BitWidth) &&
+ "Non-power-of-2-sized integers not handled!");
+
+ // We don't expect assemblers to support integer data directives
+ // for more than 64 bits, so we emit the data in at most 64-bit
+ // quantities at a time.
+ const uint64_t *RawData = CI->getValue().getRawData();
+ for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
+ uint64_t Val;
+ if (TD->isBigEndian())
+ Val = RawData[e - i - 1];
+ else
+ Val = RawData[i];
+
+ if (TAI->getData64bitsDirective(AddrSpace))
+ O << TAI->getData64bitsDirective(AddrSpace) << Val << '\n';
+ else if (TD->isBigEndian()) {
+ O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " Double-word most significant word " << Val;
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " Double-word least significant word " << Val;
+ O << '\n';
+ } else {
+ O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " Double-word least significant word " << Val;
+ O << '\n';
+ O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString()
+ << " Double-word most significant word " << Val;
+ O << '\n';
+ }
+ }
+}
+
+/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
+void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
+ const TargetData *TD = TM.getTargetData();
+ const Type *type = CV->getType();
+ unsigned Size = TD->getTypeAllocSize(type);
+
+ if (CV->isNullValue() || isa<UndefValue>(CV)) {
+ EmitZeros(Size, AddrSpace);
+ return;
+ } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
+ EmitGlobalConstantArray(CVA , AddrSpace);
+ return;
+ } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
+ EmitGlobalConstantStruct(CVS, AddrSpace);
+ return;
+ } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
+ EmitGlobalConstantFP(CFP, AddrSpace);
+ return;
+ } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
+ // Small integers are handled below; large integers are handled here.
+ if (Size > 4) {
+ EmitGlobalConstantLargeInt(CI, AddrSpace);
+ return;
+ }
+ } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
+ EmitGlobalConstantVector(CP);
+ return;
+ }
+
+ printDataDirective(type, AddrSpace);
+ EmitConstantValueOnly(CV);
+ if (VerboseAsm) {
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
+ SmallString<40> S;
+ CI->getValue().toStringUnsigned(S, 16);
+ O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
+ }
+ }
+ O << '\n';
+}
+
+void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
+ // Target doesn't support this yet!
+ abort();
+}
+
+/// PrintSpecial - Print information related to the specified machine instr
+/// that is independent of the operand, and may be independent of the instr
+/// itself. This can be useful for portably encoding the comment character
+/// or other bits of target-specific knowledge into the asmstrings. The
+/// syntax used is ${:comment}. Targets can override this to add support
+/// for their own strange codes.
+void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
+ if (!strcmp(Code, "private")) {
+ O << TAI->getPrivateGlobalPrefix();
+ } else if (!strcmp(Code, "comment")) {
+ if (VerboseAsm)
+ O << TAI->getCommentString();
+ } else if (!strcmp(Code, "uid")) {
+ // Assign a unique ID to this machine instruction.
+ static const MachineInstr *LastMI = 0;
+ static const Function *F = 0;
+ static unsigned Counter = 0U-1;
+
+ // Comparing the address of MI isn't sufficient, because machineinstrs may
+ // be allocated to the same address across functions.
+ const Function *ThisF = MI->getParent()->getParent()->getFunction();
+
+ // If this is a new machine instruction, bump the counter.
+ if (LastMI != MI || F != ThisF) {
+ ++Counter;
+ LastMI = MI;
+ F = ThisF;
+ }
+ O << Counter;
+ } else {
+ cerr << "Unknown special formatter '" << Code
+ << "' for machine instr: " << *MI;
+ exit(1);
+ }
+}
+
+/// processDebugLoc - Processes the debug information of each machine
+/// instruction's DebugLoc.
+void AsmPrinter::processDebugLoc(DebugLoc DL) {
+ if (TAI->doesSupportDebugInformation() && DW->ShouldEmitDwarfDebug()) {
+ if (!DL.isUnknown()) {
+ static DebugLocTuple PrevDLT(0, ~0U, ~0U);
+ DebugLocTuple CurDLT = MF->getDebugLocTuple(DL);
+
+ if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)
+ printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,
+ DICompileUnit(CurDLT.CompileUnit)));
+
+ PrevDLT = CurDLT;
+ }
+ }
+}
+
+/// printInlineAsm - This method formats and prints the specified machine
+/// instruction that is an inline asm.
+void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
+ unsigned NumOperands = MI->getNumOperands();
+
+ // Count the number of register definitions.
+ unsigned NumDefs = 0;
+ for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
+ ++NumDefs)
+ assert(NumDefs != NumOperands-1 && "No asm string?");
+
+ assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
+
+ // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
+ const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
+
+ // If this asmstr is empty, just print the #APP/#NOAPP markers.
+ // These are useful to see where empty asm's wound up.
+ if (AsmStr[0] == 0) {
+ O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
+ return;
+ }
+
+ O << TAI->getInlineAsmStart() << "\n\t";
+
+ // The variant of the current asmprinter.
+ int AsmPrinterVariant = TAI->getAssemblerDialect();
+
+ int CurVariant = -1; // The number of the {.|.|.} region we are in.
+ const char *LastEmitted = AsmStr; // One past the last character emitted.
+
+ while (*LastEmitted) {
+ switch (*LastEmitted) {
+ default: {
+ // Not a special case, emit the string section literally.
+ const char *LiteralEnd = LastEmitted+1;
+ while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
+ *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
+ ++LiteralEnd;
+ if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
+ O.write(LastEmitted, LiteralEnd-LastEmitted);
+ LastEmitted = LiteralEnd;
+ break;
+ }
+ case '\n':
+ ++LastEmitted; // Consume newline character.
+ O << '\n'; // Indent code with newline.
+ break;
+ case '$': {
+ ++LastEmitted; // Consume '$' character.
+ bool Done = true;
+
+ // Handle escapes.
+ switch (*LastEmitted) {
+ default: Done = false; break;
+ case '$': // $$ -> $
+ if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
+ O << '$';
+ ++LastEmitted; // Consume second '$' character.
+ break;
+ case '(': // $( -> same as GCC's { character.
+ ++LastEmitted; // Consume '(' character.
+ if (CurVariant != -1) {
+ cerr << "Nested variants found in inline asm string: '"
+ << AsmStr << "'\n";
+ exit(1);
+ }
+ CurVariant = 0; // We're in the first variant now.
+ break;
+ case '|':
+ ++LastEmitted; // consume '|' character.
+ if (CurVariant == -1)
+ O << '|'; // this is gcc's behavior for | outside a variant
+ else
+ ++CurVariant; // We're in the next variant.
+ break;
+ case ')': // $) -> same as GCC's } char.
+ ++LastEmitted; // consume ')' character.
+ if (CurVariant == -1)
+ O << '}'; // this is gcc's behavior for } outside a variant
+ else
+ CurVariant = -1;
+ break;
+ }
+ if (Done) break;
+
+ bool HasCurlyBraces = false;
+ if (*LastEmitted == '{') { // ${variable}
+ ++LastEmitted; // Consume '{' character.
+ HasCurlyBraces = true;
+ }
+
+ // If we have ${:foo}, then this is not a real operand reference, it is a
+ // "magic" string reference, just like in .td files. Arrange to call
+ // PrintSpecial.
+ if (HasCurlyBraces && *LastEmitted == ':') {
+ ++LastEmitted;
+ const char *StrStart = LastEmitted;
+ const char *StrEnd = strchr(StrStart, '}');
+ if (StrEnd == 0) {
+ cerr << "Unterminated ${:foo} operand in inline asm string: '"
+ << AsmStr << "'\n";
+ exit(1);
+ }
+
+ std::string Val(StrStart, StrEnd);
+ PrintSpecial(MI, Val.c_str());
+ LastEmitted = StrEnd+1;
+ break;
+ }
+
+ const char *IDStart = LastEmitted;
+ char *IDEnd;
+ errno = 0;
+ long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
+ if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
+ cerr << "Bad $ operand number in inline asm string: '"
+ << AsmStr << "'\n";
+ exit(1);
+ }
+ LastEmitted = IDEnd;
+
+ char Modifier[2] = { 0, 0 };
+
+ if (HasCurlyBraces) {
+ // If we have curly braces, check for a modifier character. This
+ // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
+ if (*LastEmitted == ':') {
+ ++LastEmitted; // Consume ':' character.
+ if (*LastEmitted == 0) {
+ cerr << "Bad ${:} expression in inline asm string: '"
+ << AsmStr << "'\n";
+ exit(1);
+ }
+
+ Modifier[0] = *LastEmitted;
+ ++LastEmitted; // Consume modifier character.
+ }
+
+ if (*LastEmitted != '}') {
+ cerr << "Bad ${} expression in inline asm string: '"
+ << AsmStr << "'\n";
+ exit(1);
+ }
+ ++LastEmitted; // Consume '}' character.
+ }
+
+ if ((unsigned)Val >= NumOperands-1) {
+ cerr << "Invalid $ operand number in inline asm string: '"
+ << AsmStr << "'\n";
+ exit(1);
+ }
+
+ // Okay, we finally have a value number. Ask the target to print this
+ // operand!
+ if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
+ unsigned OpNo = 1;
+
+ bool Error = false;
+
+ // Scan to find the machine operand number for the operand.
+ for (; Val; --Val) {
+ if (OpNo >= MI->getNumOperands()) break;
+ unsigned OpFlags = MI->getOperand(OpNo).getImm();
+ OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
+ }
+
+ if (OpNo >= MI->getNumOperands()) {
+ Error = true;
+ } else {
+ unsigned OpFlags = MI->getOperand(OpNo).getImm();
+ ++OpNo; // Skip over the ID number.
+
+ if (Modifier[0]=='l') // labels are target independent
+ printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
+ false, false, false);
+ else {
+ AsmPrinter *AP = const_cast<AsmPrinter*>(this);
+ if ((OpFlags & 7) == 4) {
+ Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
+ Modifier[0] ? Modifier : 0);
+ } else {
+ Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
+ Modifier[0] ? Modifier : 0);
+ }
+ }
+ }
+ if (Error) {
+ cerr << "Invalid operand found in inline asm: '"
+ << AsmStr << "'\n";
+ MI->dump();
+ exit(1);
+ }
+ }
+ break;
+ }
+ }
+ }
+ O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
+}
+
+/// printImplicitDef - This method prints the specified machine instruction
+/// that is an implicit def.
+void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
+ if (VerboseAsm)
+ O << '\t' << TAI->getCommentString() << " implicit-def: "
+ << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
+}
+
+/// printLabel - This method prints a local label used by debug and
+/// exception handling tables.
+void AsmPrinter::printLabel(const MachineInstr *MI) const {
+ printLabel(MI->getOperand(0).getImm());
+}
+
+void AsmPrinter::printLabel(unsigned Id) const {
+ O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
+}
+
+/// printDeclare - This method prints a local variable declaration used by
+/// debug tables.
+/// FIXME: It doesn't really print anything rather it inserts a DebugVariable
+/// entry into dwarf table.
+void AsmPrinter::printDeclare(const MachineInstr *MI) const {
+ unsigned FI = MI->getOperand(0).getIndex();
+ GlobalValue *GV = MI->getOperand(1).getGlobal();
+ DW->RecordVariable(cast<GlobalVariable>(GV), FI, MI);
+}
+
+/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
+/// instruction, using the specified assembler variant. Targets should
+/// overried this to format as appropriate.
+bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode) {
+ // Target doesn't support this yet!
+ return true;
+}
+
+bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ // Target doesn't support this yet!
+ return true;
+}
+
+/// printBasicBlockLabel - This method prints the label for the specified
+/// MachineBasicBlock
+void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
+ bool printAlign,
+ bool printColon,
+ bool printComment) const {
+ if (printAlign) {
+ unsigned Align = MBB->getAlignment();
+ if (Align)
+ EmitAlignment(Log2_32(Align));
+ }
+
+ O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
+ << MBB->getNumber();
+ if (printColon)
+ O << ':';
+ if (printComment && MBB->getBasicBlock())
+ O << '\t' << TAI->getCommentString() << ' '
+ << MBB->getBasicBlock()->getNameStart();
+}
+
+/// printPICJumpTableSetLabel - This method prints a set label for the
+/// specified MachineBasicBlock for a jumptable entry.
+void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
+ const MachineBasicBlock *MBB) const {
+ if (!TAI->getSetDirective())
+ return;
+
+ O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
+ printBasicBlockLabel(MBB, false, false, false);
+ O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << uid << '\n';
+}
+
+void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
+ const MachineBasicBlock *MBB) const {
+ if (!TAI->getSetDirective())
+ return;
+
+ O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << uid << '_' << uid2
+ << "_set_" << MBB->getNumber() << ',';
+ printBasicBlockLabel(MBB, false, false, false);
+ O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << uid << '_' << uid2 << '\n';
+}
+
+/// printDataDirective - This method prints the asm directive for the
+/// specified type.
+void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
+ const TargetData *TD = TM.getTargetData();
+ switch (type->getTypeID()) {
+ case Type::IntegerTyID: {
+ unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
+ if (BitWidth <= 8)
+ O << TAI->getData8bitsDirective(AddrSpace);
+ else if (BitWidth <= 16)
+ O << TAI->getData16bitsDirective(AddrSpace);
+ else if (BitWidth <= 32)
+ O << TAI->getData32bitsDirective(AddrSpace);
+ else if (BitWidth <= 64) {
+ assert(TAI->getData64bitsDirective(AddrSpace) &&
+ "Target cannot handle 64-bit constant exprs!");
+ O << TAI->getData64bitsDirective(AddrSpace);
+ } else {
+ assert(0 && "Target cannot handle given data directive width!");
+ }
+ break;
+ }
+ case Type::PointerTyID:
+ if (TD->getPointerSize() == 8) {
+ assert(TAI->getData64bitsDirective(AddrSpace) &&
+ "Target cannot handle 64-bit pointer exprs!");
+ O << TAI->getData64bitsDirective(AddrSpace);
+ } else if (TD->getPointerSize() == 2) {
+ O << TAI->getData16bitsDirective(AddrSpace);
+ } else if (TD->getPointerSize() == 1) {
+ O << TAI->getData8bitsDirective(AddrSpace);
+ } else {
+ O << TAI->getData32bitsDirective(AddrSpace);
+ }
+ break;
+ case Type::FloatTyID: case Type::DoubleTyID:
+ case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
+ assert (0 && "Should have already output floating point constant.");
+ default:
+ assert (0 && "Can't handle printing this type of thing");
+ break;
+ }
+}
+
+void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
+ const char *Prefix) {
+ if (Name[0]=='\"')
+ O << '\"';
+ O << TAI->getPrivateGlobalPrefix();
+ if (Prefix) O << Prefix;
+ if (Name[0]=='\"')
+ O << '\"';
+ if (Name[0]=='\"')
+ O << Name[1];
+ else
+ O << Name;
+ O << Suffix;
+ if (Name[0]=='\"')
+ O << '\"';
+}
+
+void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
+ printSuffixedName(Name.c_str(), Suffix);
+}
+
+void AsmPrinter::printVisibility(const std::string& Name,
+ unsigned Visibility) const {
+ if (Visibility == GlobalValue::HiddenVisibility) {
+ if (const char *Directive = TAI->getHiddenDirective())
+ O << Directive << Name << '\n';
+ } else if (Visibility == GlobalValue::ProtectedVisibility) {
+ if (const char *Directive = TAI->getProtectedDirective())
+ O << Directive << Name << '\n';
+ }
+}
+
+void AsmPrinter::printOffset(int64_t Offset) const {
+ if (Offset > 0)
+ O << '+' << Offset;
+ else if (Offset < 0)
+ O << Offset;
+}
+
+GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
+ if (!S->usesMetadata())
+ return 0;
+
+ gcp_iterator GCPI = GCMetadataPrinters.find(S);
+ if (GCPI != GCMetadataPrinters.end())
+ return GCPI->second;
+
+ const char *Name = S->getName().c_str();
+
+ for (GCMetadataPrinterRegistry::iterator
+ I = GCMetadataPrinterRegistry::begin(),
+ E = GCMetadataPrinterRegistry::end(); I != E; ++I)
+ if (strcmp(Name, I->getName()) == 0) {
+ GCMetadataPrinter *GMP = I->instantiate();
+ GMP->S = S;
+ GCMetadataPrinters.insert(std::make_pair(S, GMP));
+ return GMP;
+ }
+
+ cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";
+ abort();
+}
diff --git a/lib/CodeGen/AsmPrinter/CMakeLists.txt b/lib/CodeGen/AsmPrinter/CMakeLists.txt
new file mode 100644
index 0000000..066aaab
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/CMakeLists.txt
@@ -0,0 +1,10 @@
+add_llvm_library(LLVMAsmPrinter
+ AsmPrinter.cpp
+ DIE.cpp
+ DwarfDebug.cpp
+ DwarfException.cpp
+ DwarfLabel.cpp
+ DwarfPrinter.cpp
+ DwarfWriter.cpp
+ OcamlGCPrinter.cpp
+ )
diff --git a/lib/CodeGen/AsmPrinter/DIE.cpp b/lib/CodeGen/AsmPrinter/DIE.cpp
new file mode 100644
index 0000000..dc149cf
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DIE.cpp
@@ -0,0 +1,518 @@
+//===--- lib/CodeGen/DIE.cpp - DWARF Info Entries -------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Data structures for DWARF info entries.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DIE.h"
+#include "DwarfPrinter.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetData.h"
+#include <ostream>
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// DIEAbbrevData Implementation
+//===----------------------------------------------------------------------===//
+
+/// Profile - Used to gather unique data for the abbreviation folding set.
+///
+void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const {
+ ID.AddInteger(Attribute);
+ ID.AddInteger(Form);
+}
+
+//===----------------------------------------------------------------------===//
+// DIEAbbrev Implementation
+//===----------------------------------------------------------------------===//
+
+/// Profile - Used to gather unique data for the abbreviation folding set.
+///
+void DIEAbbrev::Profile(FoldingSetNodeID &ID) const {
+ ID.AddInteger(Tag);
+ ID.AddInteger(ChildrenFlag);
+
+ // For each attribute description.
+ for (unsigned i = 0, N = Data.size(); i < N; ++i)
+ Data[i].Profile(ID);
+}
+
+/// Emit - Print the abbreviation using the specified asm printer.
+///
+void DIEAbbrev::Emit(const AsmPrinter *Asm) const {
+ // Emit its Dwarf tag type.
+ Asm->EmitULEB128Bytes(Tag);
+ Asm->EOL(dwarf::TagString(Tag));
+
+ // Emit whether it has children DIEs.
+ Asm->EmitULEB128Bytes(ChildrenFlag);
+ Asm->EOL(dwarf::ChildrenString(ChildrenFlag));
+
+ // For each attribute description.
+ for (unsigned i = 0, N = Data.size(); i < N; ++i) {
+ const DIEAbbrevData &AttrData = Data[i];
+
+ // Emit attribute type.
+ Asm->EmitULEB128Bytes(AttrData.getAttribute());
+ Asm->EOL(dwarf::AttributeString(AttrData.getAttribute()));
+
+ // Emit form type.
+ Asm->EmitULEB128Bytes(AttrData.getForm());
+ Asm->EOL(dwarf::FormEncodingString(AttrData.getForm()));
+ }
+
+ // Mark end of abbreviation.
+ Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(1)");
+ Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(2)");
+}
+
+#ifndef NDEBUG
+void DIEAbbrev::print(std::ostream &O) {
+ O << "Abbreviation @"
+ << std::hex << (intptr_t)this << std::dec
+ << " "
+ << dwarf::TagString(Tag)
+ << " "
+ << dwarf::ChildrenString(ChildrenFlag)
+ << "\n";
+
+ for (unsigned i = 0, N = Data.size(); i < N; ++i) {
+ O << " "
+ << dwarf::AttributeString(Data[i].getAttribute())
+ << " "
+ << dwarf::FormEncodingString(Data[i].getForm())
+ << "\n";
+ }
+}
+void DIEAbbrev::dump() { print(cerr); }
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIE Implementation
+//===----------------------------------------------------------------------===//
+
+DIE::~DIE() {
+ for (unsigned i = 0, N = Children.size(); i < N; ++i)
+ delete Children[i];
+}
+
+/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
+///
+void DIE::AddSiblingOffset() {
+ DIEInteger *DI = new DIEInteger(0);
+ Values.insert(Values.begin(), DI);
+ Abbrev.AddFirstAttribute(dwarf::DW_AT_sibling, dwarf::DW_FORM_ref4);
+}
+
+/// Profile - Used to gather unique data for the value folding set.
+///
+void DIE::Profile(FoldingSetNodeID &ID) {
+ Abbrev.Profile(ID);
+
+ for (unsigned i = 0, N = Children.size(); i < N; ++i)
+ ID.AddPointer(Children[i]);
+
+ for (unsigned j = 0, M = Values.size(); j < M; ++j)
+ ID.AddPointer(Values[j]);
+}
+
+#ifndef NDEBUG
+void DIE::print(std::ostream &O, unsigned IncIndent) {
+ static unsigned IndentCount = 0;
+ IndentCount += IncIndent;
+ const std::string Indent(IndentCount, ' ');
+ bool isBlock = Abbrev.getTag() == 0;
+
+ if (!isBlock) {
+ O << Indent
+ << "Die: "
+ << "0x" << std::hex << (intptr_t)this << std::dec
+ << ", Offset: " << Offset
+ << ", Size: " << Size
+ << "\n";
+
+ O << Indent
+ << dwarf::TagString(Abbrev.getTag())
+ << " "
+ << dwarf::ChildrenString(Abbrev.getChildrenFlag());
+ } else {
+ O << "Size: " << Size;
+ }
+ O << "\n";
+
+ const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
+
+ IndentCount += 2;
+ for (unsigned i = 0, N = Data.size(); i < N; ++i) {
+ O << Indent;
+
+ if (!isBlock)
+ O << dwarf::AttributeString(Data[i].getAttribute());
+ else
+ O << "Blk[" << i << "]";
+
+ O << " "
+ << dwarf::FormEncodingString(Data[i].getForm())
+ << " ";
+ Values[i]->print(O);
+ O << "\n";
+ }
+ IndentCount -= 2;
+
+ for (unsigned j = 0, M = Children.size(); j < M; ++j) {
+ Children[j]->print(O, 4);
+ }
+
+ if (!isBlock) O << "\n";
+ IndentCount -= IncIndent;
+}
+
+void DIE::dump() {
+ print(cerr);
+}
+#endif
+
+
+#ifndef NDEBUG
+void DIEValue::dump() {
+ print(cerr);
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIEInteger Implementation
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit integer of appropriate size.
+///
+void DIEInteger::EmitValue(Dwarf *D, unsigned Form) const {
+ const AsmPrinter *Asm = D->getAsm();
+ switch (Form) {
+ case dwarf::DW_FORM_flag: // Fall thru
+ case dwarf::DW_FORM_ref1: // Fall thru
+ case dwarf::DW_FORM_data1: Asm->EmitInt8(Integer); break;
+ case dwarf::DW_FORM_ref2: // Fall thru
+ case dwarf::DW_FORM_data2: Asm->EmitInt16(Integer); break;
+ case dwarf::DW_FORM_ref4: // Fall thru
+ case dwarf::DW_FORM_data4: Asm->EmitInt32(Integer); break;
+ case dwarf::DW_FORM_ref8: // Fall thru
+ case dwarf::DW_FORM_data8: Asm->EmitInt64(Integer); break;
+ case dwarf::DW_FORM_udata: Asm->EmitULEB128Bytes(Integer); break;
+ case dwarf::DW_FORM_sdata: Asm->EmitSLEB128Bytes(Integer); break;
+ default: assert(0 && "DIE Value form not supported yet"); break;
+ }
+}
+
+/// SizeOf - Determine size of integer value in bytes.
+///
+unsigned DIEInteger::SizeOf(const TargetData *TD, unsigned Form) const {
+ switch (Form) {
+ case dwarf::DW_FORM_flag: // Fall thru
+ case dwarf::DW_FORM_ref1: // Fall thru
+ case dwarf::DW_FORM_data1: return sizeof(int8_t);
+ case dwarf::DW_FORM_ref2: // Fall thru
+ case dwarf::DW_FORM_data2: return sizeof(int16_t);
+ case dwarf::DW_FORM_ref4: // Fall thru
+ case dwarf::DW_FORM_data4: return sizeof(int32_t);
+ case dwarf::DW_FORM_ref8: // Fall thru
+ case dwarf::DW_FORM_data8: return sizeof(int64_t);
+ case dwarf::DW_FORM_udata: return TargetAsmInfo::getULEB128Size(Integer);
+ case dwarf::DW_FORM_sdata: return TargetAsmInfo::getSLEB128Size(Integer);
+ default: assert(0 && "DIE Value form not supported yet"); break;
+ }
+ return 0;
+}
+
+/// Profile - Used to gather unique data for the value folding set.
+///
+void DIEInteger::Profile(FoldingSetNodeID &ID, unsigned Int) {
+ ID.AddInteger(isInteger);
+ ID.AddInteger(Int);
+}
+void DIEInteger::Profile(FoldingSetNodeID &ID) {
+ Profile(ID, Integer);
+}
+
+#ifndef NDEBUG
+void DIEInteger::print(std::ostream &O) {
+ O << "Int: " << (int64_t)Integer
+ << " 0x" << std::hex << Integer << std::dec;
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIEString Implementation
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit string value.
+///
+void DIEString::EmitValue(Dwarf *D, unsigned Form) const {
+ D->getAsm()->EmitString(Str);
+}
+
+/// Profile - Used to gather unique data for the value folding set.
+///
+void DIEString::Profile(FoldingSetNodeID &ID, const std::string &Str) {
+ ID.AddInteger(isString);
+ ID.AddString(Str);
+}
+void DIEString::Profile(FoldingSetNodeID &ID) {
+ Profile(ID, Str);
+}
+
+#ifndef NDEBUG
+void DIEString::print(std::ostream &O) {
+ O << "Str: \"" << Str << "\"";
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIEDwarfLabel Implementation
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit label value.
+///
+void DIEDwarfLabel::EmitValue(Dwarf *D, unsigned Form) const {
+ bool IsSmall = Form == dwarf::DW_FORM_data4;
+ D->EmitReference(Label, false, IsSmall);
+}
+
+/// SizeOf - Determine size of label value in bytes.
+///
+unsigned DIEDwarfLabel::SizeOf(const TargetData *TD, unsigned Form) const {
+ if (Form == dwarf::DW_FORM_data4) return 4;
+ return TD->getPointerSize();
+}
+
+/// Profile - Used to gather unique data for the value folding set.
+///
+void DIEDwarfLabel::Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
+ ID.AddInteger(isLabel);
+ Label.Profile(ID);
+}
+void DIEDwarfLabel::Profile(FoldingSetNodeID &ID) {
+ Profile(ID, Label);
+}
+
+#ifndef NDEBUG
+void DIEDwarfLabel::print(std::ostream &O) {
+ O << "Lbl: ";
+ Label.print(O);
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIEObjectLabel Implementation
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit label value.
+///
+void DIEObjectLabel::EmitValue(Dwarf *D, unsigned Form) const {
+ bool IsSmall = Form == dwarf::DW_FORM_data4;
+ D->EmitReference(Label, false, IsSmall);
+}
+
+/// SizeOf - Determine size of label value in bytes.
+///
+unsigned DIEObjectLabel::SizeOf(const TargetData *TD, unsigned Form) const {
+ if (Form == dwarf::DW_FORM_data4) return 4;
+ return TD->getPointerSize();
+}
+
+/// Profile - Used to gather unique data for the value folding set.
+///
+void DIEObjectLabel::Profile(FoldingSetNodeID &ID, const std::string &Label) {
+ ID.AddInteger(isAsIsLabel);
+ ID.AddString(Label);
+}
+void DIEObjectLabel::Profile(FoldingSetNodeID &ID) {
+ Profile(ID, Label.c_str());
+}
+
+#ifndef NDEBUG
+void DIEObjectLabel::print(std::ostream &O) {
+ O << "Obj: " << Label;
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIESectionOffset Implementation
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit delta value.
+///
+void DIESectionOffset::EmitValue(Dwarf *D, unsigned Form) const {
+ bool IsSmall = Form == dwarf::DW_FORM_data4;
+ D->EmitSectionOffset(Label.getTag(), Section.getTag(),
+ Label.getNumber(), Section.getNumber(),
+ IsSmall, IsEH, UseSet);
+}
+
+/// SizeOf - Determine size of delta value in bytes.
+///
+unsigned DIESectionOffset::SizeOf(const TargetData *TD, unsigned Form) const {
+ if (Form == dwarf::DW_FORM_data4) return 4;
+ return TD->getPointerSize();
+}
+
+/// Profile - Used to gather unique data for the value folding set.
+///
+void DIESectionOffset::Profile(FoldingSetNodeID &ID, const DWLabel &Label,
+ const DWLabel &Section) {
+ ID.AddInteger(isSectionOffset);
+ Label.Profile(ID);
+ Section.Profile(ID);
+ // IsEH and UseSet are specific to the Label/Section that we will emit the
+ // offset for; so Label/Section are enough for uniqueness.
+}
+void DIESectionOffset::Profile(FoldingSetNodeID &ID) {
+ Profile(ID, Label, Section);
+}
+
+#ifndef NDEBUG
+void DIESectionOffset::print(std::ostream &O) {
+ O << "Off: ";
+ Label.print(O);
+ O << "-";
+ Section.print(O);
+ O << "-" << IsEH << "-" << UseSet;
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIEDelta Implementation
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit delta value.
+///
+void DIEDelta::EmitValue(Dwarf *D, unsigned Form) const {
+ bool IsSmall = Form == dwarf::DW_FORM_data4;
+ D->EmitDifference(LabelHi, LabelLo, IsSmall);
+}
+
+/// SizeOf - Determine size of delta value in bytes.
+///
+unsigned DIEDelta::SizeOf(const TargetData *TD, unsigned Form) const {
+ if (Form == dwarf::DW_FORM_data4) return 4;
+ return TD->getPointerSize();
+}
+
+/// Profile - Used to gather unique data for the value folding set.
+///
+void DIEDelta::Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
+ const DWLabel &LabelLo) {
+ ID.AddInteger(isDelta);
+ LabelHi.Profile(ID);
+ LabelLo.Profile(ID);
+}
+void DIEDelta::Profile(FoldingSetNodeID &ID) {
+ Profile(ID, LabelHi, LabelLo);
+}
+
+#ifndef NDEBUG
+void DIEDelta::print(std::ostream &O) {
+ O << "Del: ";
+ LabelHi.print(O);
+ O << "-";
+ LabelLo.print(O);
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIEEntry Implementation
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit debug information entry offset.
+///
+void DIEEntry::EmitValue(Dwarf *D, unsigned Form) const {
+ D->getAsm()->EmitInt32(Entry->getOffset());
+}
+
+/// Profile - Used to gather unique data for the value folding set.
+///
+void DIEEntry::Profile(FoldingSetNodeID &ID, DIE *Entry) {
+ ID.AddInteger(isEntry);
+ ID.AddPointer(Entry);
+}
+void DIEEntry::Profile(FoldingSetNodeID &ID) {
+ ID.AddInteger(isEntry);
+
+ if (Entry)
+ ID.AddPointer(Entry);
+ else
+ ID.AddPointer(this);
+}
+
+#ifndef NDEBUG
+void DIEEntry::print(std::ostream &O) {
+ O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec;
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// DIEBlock Implementation
+//===----------------------------------------------------------------------===//
+
+/// ComputeSize - calculate the size of the block.
+///
+unsigned DIEBlock::ComputeSize(const TargetData *TD) {
+ if (!Size) {
+ const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
+ for (unsigned i = 0, N = Values.size(); i < N; ++i)
+ Size += Values[i]->SizeOf(TD, AbbrevData[i].getForm());
+ }
+
+ return Size;
+}
+
+/// EmitValue - Emit block data.
+///
+void DIEBlock::EmitValue(Dwarf *D, unsigned Form) const {
+ const AsmPrinter *Asm = D->getAsm();
+ switch (Form) {
+ case dwarf::DW_FORM_block1: Asm->EmitInt8(Size); break;
+ case dwarf::DW_FORM_block2: Asm->EmitInt16(Size); break;
+ case dwarf::DW_FORM_block4: Asm->EmitInt32(Size); break;
+ case dwarf::DW_FORM_block: Asm->EmitULEB128Bytes(Size); break;
+ default: assert(0 && "Improper form for block"); break;
+ }
+
+ const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
+ for (unsigned i = 0, N = Values.size(); i < N; ++i) {
+ Asm->EOL();
+ Values[i]->EmitValue(D, AbbrevData[i].getForm());
+ }
+}
+
+/// SizeOf - Determine size of block data in bytes.
+///
+unsigned DIEBlock::SizeOf(const TargetData *TD, unsigned Form) const {
+ switch (Form) {
+ case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
+ case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
+ case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
+ case dwarf::DW_FORM_block: return Size + TargetAsmInfo::getULEB128Size(Size);
+ default: assert(0 && "Improper form for block"); break;
+ }
+ return 0;
+}
+
+void DIEBlock::Profile(FoldingSetNodeID &ID) {
+ ID.AddInteger(isBlock);
+ DIE::Profile(ID);
+}
+
+#ifndef NDEBUG
+void DIEBlock::print(std::ostream &O) {
+ O << "Blk: ";
+ DIE::print(O, 5);
+}
+#endif
diff --git a/lib/CodeGen/AsmPrinter/DIE.h b/lib/CodeGen/AsmPrinter/DIE.h
new file mode 100644
index 0000000..b14d91c
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DIE.h
@@ -0,0 +1,549 @@
+//===--- lib/CodeGen/DIE.h - DWARF Info Entries -----------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Data structures for DWARF info entries.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_ASMPRINTER_DIE_H__
+#define CODEGEN_ASMPRINTER_DIE_H__
+
+#include "DwarfLabel.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/raw_ostream.h"
+#include <iosfwd>
+
+namespace llvm {
+ class AsmPrinter;
+ class Dwarf;
+ class TargetData;
+
+ //===--------------------------------------------------------------------===//
+ /// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
+ /// Dwarf abbreviation.
+ class VISIBILITY_HIDDEN DIEAbbrevData {
+ /// Attribute - Dwarf attribute code.
+ ///
+ unsigned Attribute;
+
+ /// Form - Dwarf form code.
+ ///
+ unsigned Form;
+ public:
+ DIEAbbrevData(unsigned A, unsigned F) : Attribute(A), Form(F) {}
+
+ // Accessors.
+ unsigned getAttribute() const { return Attribute; }
+ unsigned getForm() const { return Form; }
+
+ /// Profile - Used to gather unique data for the abbreviation folding set.
+ ///
+ void Profile(FoldingSetNodeID &ID) const;
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
+ /// information object.
+ class VISIBILITY_HIDDEN DIEAbbrev : public FoldingSetNode {
+ /// Tag - Dwarf tag code.
+ ///
+ unsigned Tag;
+
+ /// Unique number for node.
+ ///
+ unsigned Number;
+
+ /// ChildrenFlag - Dwarf children flag.
+ ///
+ unsigned ChildrenFlag;
+
+ /// Data - Raw data bytes for abbreviation.
+ ///
+ SmallVector<DIEAbbrevData, 8> Data;
+ public:
+ DIEAbbrev(unsigned T, unsigned C) : Tag(T), ChildrenFlag(C), Data() {}
+ virtual ~DIEAbbrev() {}
+
+ // Accessors.
+ unsigned getTag() const { return Tag; }
+ unsigned getNumber() const { return Number; }
+ unsigned getChildrenFlag() const { return ChildrenFlag; }
+ const SmallVector<DIEAbbrevData, 8> &getData() const { return Data; }
+ void setTag(unsigned T) { Tag = T; }
+ void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
+ void setNumber(unsigned N) { Number = N; }
+
+ /// AddAttribute - Adds another set of attribute information to the
+ /// abbreviation.
+ void AddAttribute(unsigned Attribute, unsigned Form) {
+ Data.push_back(DIEAbbrevData(Attribute, Form));
+ }
+
+ /// AddFirstAttribute - Adds a set of attribute information to the front
+ /// of the abbreviation.
+ void AddFirstAttribute(unsigned Attribute, unsigned Form) {
+ Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
+ }
+
+ /// Profile - Used to gather unique data for the abbreviation folding set.
+ ///
+ void Profile(FoldingSetNodeID &ID) const;
+
+ /// Emit - Print the abbreviation using the specified asm printer.
+ ///
+ void Emit(const AsmPrinter *Asm) const;
+
+#ifndef NDEBUG
+ void print(std::ostream *O) {
+ if (O) print(*O);
+ }
+ void print(std::ostream &O);
+ void dump();
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIE - A structured debug information entry. Has an abbreviation which
+ /// describes it's organization.
+ class CompileUnit;
+ class DIEValue;
+
+ class VISIBILITY_HIDDEN DIE : public FoldingSetNode {
+ protected:
+ /// Abbrev - Buffer for constructing abbreviation.
+ ///
+ DIEAbbrev Abbrev;
+
+ /// Offset - Offset in debug info section.
+ ///
+ unsigned Offset;
+
+ /// Size - Size of instance + children.
+ ///
+ unsigned Size;
+
+ /// Children DIEs.
+ ///
+ std::vector<DIE *> Children;
+
+ /// Attributes values.
+ ///
+ SmallVector<DIEValue*, 32> Values;
+
+ /// Abstract compile unit.
+ CompileUnit *AbstractCU;
+ public:
+ explicit DIE(unsigned Tag)
+ : Abbrev(Tag, dwarf::DW_CHILDREN_no), Offset(0), Size(0) {}
+ virtual ~DIE();
+
+ // Accessors.
+ DIEAbbrev &getAbbrev() { return Abbrev; }
+ unsigned getAbbrevNumber() const { return Abbrev.getNumber(); }
+ unsigned getTag() const { return Abbrev.getTag(); }
+ unsigned getOffset() const { return Offset; }
+ unsigned getSize() const { return Size; }
+ const std::vector<DIE *> &getChildren() const { return Children; }
+ SmallVector<DIEValue*, 32> &getValues() { return Values; }
+ CompileUnit *getAbstractCompileUnit() const { return AbstractCU; }
+
+ void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
+ void setOffset(unsigned O) { Offset = O; }
+ void setSize(unsigned S) { Size = S; }
+ void setAbstractCompileUnit(CompileUnit *CU) { AbstractCU = CU; }
+
+ /// AddValue - Add a value and attributes to a DIE.
+ ///
+ void AddValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
+ Abbrev.AddAttribute(Attribute, Form);
+ Values.push_back(Value);
+ }
+
+ /// SiblingOffset - Return the offset of the debug information entry's
+ /// sibling.
+ unsigned SiblingOffset() const { return Offset + Size; }
+
+ /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
+ ///
+ void AddSiblingOffset();
+
+ /// AddChild - Add a child to the DIE.
+ ///
+ void AddChild(DIE *Child) {
+ Abbrev.setChildrenFlag(dwarf::DW_CHILDREN_yes);
+ Children.push_back(Child);
+ }
+
+ /// Detach - Detaches objects connected to it after copying.
+ ///
+ void Detach() {
+ Children.clear();
+ }
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ void Profile(FoldingSetNodeID &ID) ;
+
+#ifndef NDEBUG
+ void print(std::ostream *O, unsigned IncIndent = 0) {
+ if (O) print(*O, IncIndent);
+ }
+ void print(std::ostream &O, unsigned IncIndent = 0);
+ void dump();
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIEValue - A debug information entry value.
+ ///
+ class VISIBILITY_HIDDEN DIEValue : public FoldingSetNode {
+ public:
+ enum {
+ isInteger,
+ isString,
+ isLabel,
+ isAsIsLabel,
+ isSectionOffset,
+ isDelta,
+ isEntry,
+ isBlock
+ };
+ protected:
+ /// Type - Type of data stored in the value.
+ ///
+ unsigned Type;
+ public:
+ explicit DIEValue(unsigned T) : Type(T) {}
+ virtual ~DIEValue() {}
+
+ // Accessors
+ unsigned getType() const { return Type; }
+
+ /// EmitValue - Emit value via the Dwarf writer.
+ ///
+ virtual void EmitValue(Dwarf *D, unsigned Form) const = 0;
+
+ /// SizeOf - Return the size of a value in bytes.
+ ///
+ virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const = 0;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ virtual void Profile(FoldingSetNodeID &ID) = 0;
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEValue *) { return true; }
+
+#ifndef NDEBUG
+ void print(std::ostream *O) {
+ if (O) print(*O);
+ }
+ virtual void print(std::ostream &O) = 0;
+ void dump();
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIEInteger - An integer value DIE.
+ ///
+ class VISIBILITY_HIDDEN DIEInteger : public DIEValue {
+ uint64_t Integer;
+ public:
+ explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
+
+ /// BestForm - Choose the best form for integer.
+ ///
+ static unsigned BestForm(bool IsSigned, uint64_t Int) {
+ if (IsSigned) {
+ if ((char)Int == (signed)Int) return dwarf::DW_FORM_data1;
+ if ((short)Int == (signed)Int) return dwarf::DW_FORM_data2;
+ if ((int)Int == (signed)Int) return dwarf::DW_FORM_data4;
+ } else {
+ if ((unsigned char)Int == Int) return dwarf::DW_FORM_data1;
+ if ((unsigned short)Int == Int) return dwarf::DW_FORM_data2;
+ if ((unsigned int)Int == Int) return dwarf::DW_FORM_data4;
+ }
+ return dwarf::DW_FORM_data8;
+ }
+
+ /// EmitValue - Emit integer of appropriate size.
+ ///
+ virtual void EmitValue(Dwarf *D, unsigned Form) const;
+
+ /// SizeOf - Determine size of integer value in bytes.
+ ///
+ virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, unsigned Int);
+ virtual void Profile(FoldingSetNodeID &ID);
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEInteger *) { return true; }
+ static bool classof(const DIEValue *I) { return I->getType() == isInteger; }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O);
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIEString - A string value DIE.
+ ///
+ class VISIBILITY_HIDDEN DIEString : public DIEValue {
+ const std::string Str;
+ public:
+ explicit DIEString(const std::string &S) : DIEValue(isString), Str(S) {}
+
+ /// EmitValue - Emit string value.
+ ///
+ virtual void EmitValue(Dwarf *D, unsigned Form) const;
+
+ /// SizeOf - Determine size of string value in bytes.
+ ///
+ virtual unsigned SizeOf(const TargetData *, unsigned /*Form*/) const {
+ return Str.size() + sizeof(char); // sizeof('\0');
+ }
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const std::string &Str);
+ virtual void Profile(FoldingSetNodeID &ID);
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEString *) { return true; }
+ static bool classof(const DIEValue *S) { return S->getType() == isString; }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O);
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIEDwarfLabel - A Dwarf internal label expression DIE.
+ //
+ class VISIBILITY_HIDDEN DIEDwarfLabel : public DIEValue {
+ const DWLabel Label;
+ public:
+ explicit DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
+
+ /// EmitValue - Emit label value.
+ ///
+ virtual void EmitValue(Dwarf *D, unsigned Form) const;
+
+ /// SizeOf - Determine size of label value in bytes.
+ ///
+ virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const DWLabel &Label);
+ virtual void Profile(FoldingSetNodeID &ID);
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEDwarfLabel *) { return true; }
+ static bool classof(const DIEValue *L) { return L->getType() == isLabel; }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O);
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIEObjectLabel - A label to an object in code or data.
+ //
+ class VISIBILITY_HIDDEN DIEObjectLabel : public DIEValue {
+ const std::string Label;
+ public:
+ explicit DIEObjectLabel(const std::string &L)
+ : DIEValue(isAsIsLabel), Label(L) {}
+
+ /// EmitValue - Emit label value.
+ ///
+ virtual void EmitValue(Dwarf *D, unsigned Form) const;
+
+ /// SizeOf - Determine size of label value in bytes.
+ ///
+ virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const std::string &Label);
+ virtual void Profile(FoldingSetNodeID &ID);
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEObjectLabel *) { return true; }
+ static bool classof(const DIEValue *L) {
+ return L->getType() == isAsIsLabel;
+ }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O);
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIESectionOffset - A section offset DIE.
+ ///
+ class VISIBILITY_HIDDEN DIESectionOffset : public DIEValue {
+ const DWLabel Label;
+ const DWLabel Section;
+ bool IsEH : 1;
+ bool UseSet : 1;
+ public:
+ DIESectionOffset(const DWLabel &Lab, const DWLabel &Sec,
+ bool isEH = false, bool useSet = true)
+ : DIEValue(isSectionOffset), Label(Lab), Section(Sec),
+ IsEH(isEH), UseSet(useSet) {}
+
+ /// EmitValue - Emit section offset.
+ ///
+ virtual void EmitValue(Dwarf *D, unsigned Form) const;
+
+ /// SizeOf - Determine size of section offset value in bytes.
+ ///
+ virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const DWLabel &Label,
+ const DWLabel &Section);
+ virtual void Profile(FoldingSetNodeID &ID);
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIESectionOffset *) { return true; }
+ static bool classof(const DIEValue *D) {
+ return D->getType() == isSectionOffset;
+ }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O);
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIEDelta - A simple label difference DIE.
+ ///
+ class VISIBILITY_HIDDEN DIEDelta : public DIEValue {
+ const DWLabel LabelHi;
+ const DWLabel LabelLo;
+ public:
+ DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
+ : DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
+
+ /// EmitValue - Emit delta value.
+ ///
+ virtual void EmitValue(Dwarf *D, unsigned Form) const;
+
+ /// SizeOf - Determine size of delta value in bytes.
+ ///
+ virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
+ const DWLabel &LabelLo);
+ virtual void Profile(FoldingSetNodeID &ID);
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEDelta *) { return true; }
+ static bool classof(const DIEValue *D) { return D->getType() == isDelta; }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O);
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIEntry - A pointer to another debug information entry. An instance of
+ /// this class can also be used as a proxy for a debug information entry not
+ /// yet defined (ie. types.)
+ class VISIBILITY_HIDDEN DIEEntry : public DIEValue {
+ DIE *Entry;
+ public:
+ explicit DIEEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
+
+ DIE *getEntry() const { return Entry; }
+ void setEntry(DIE *E) { Entry = E; }
+
+ /// EmitValue - Emit debug information entry offset.
+ ///
+ virtual void EmitValue(Dwarf *D, unsigned Form) const;
+
+ /// SizeOf - Determine size of debug information entry in bytes.
+ ///
+ virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const {
+ return sizeof(int32_t);
+ }
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, DIE *Entry);
+ virtual void Profile(FoldingSetNodeID &ID);
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEEntry *) { return true; }
+ static bool classof(const DIEValue *E) { return E->getType() == isEntry; }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O);
+#endif
+ };
+
+ //===--------------------------------------------------------------------===//
+ /// DIEBlock - A block of values. Primarily used for location expressions.
+ //
+ class VISIBILITY_HIDDEN DIEBlock : public DIEValue, public DIE {
+ unsigned Size; // Size in bytes excluding size header.
+ public:
+ DIEBlock()
+ : DIEValue(isBlock), DIE(0), Size(0) {}
+ virtual ~DIEBlock() {}
+
+ /// ComputeSize - calculate the size of the block.
+ ///
+ unsigned ComputeSize(const TargetData *TD);
+
+ /// BestForm - Choose the best form for data.
+ ///
+ unsigned BestForm() const {
+ if ((unsigned char)Size == Size) return dwarf::DW_FORM_block1;
+ if ((unsigned short)Size == Size) return dwarf::DW_FORM_block2;
+ if ((unsigned int)Size == Size) return dwarf::DW_FORM_block4;
+ return dwarf::DW_FORM_block;
+ }
+
+ /// EmitValue - Emit block data.
+ ///
+ virtual void EmitValue(Dwarf *D, unsigned Form) const;
+
+ /// SizeOf - Determine size of block data in bytes.
+ ///
+ virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ virtual void Profile(FoldingSetNodeID &ID);
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEBlock *) { return true; }
+ static bool classof(const DIEValue *E) { return E->getType() == isBlock; }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O);
+#endif
+ };
+
+} // end llvm namespace
+
+#endif
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
new file mode 100644
index 0000000..25217b0
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -0,0 +1,2610 @@
+//===-- llvm/CodeGen/DwarfDebug.cpp - Dwarf Debug Framework ---------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing dwarf debug info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DwarfDebug.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/Support/Timer.h"
+#include "llvm/System/Path.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetFrameInfo.h"
+#include <ostream>
+using namespace llvm;
+
+static TimerGroup &getDwarfTimerGroup() {
+ static TimerGroup DwarfTimerGroup("Dwarf Debugging");
+ return DwarfTimerGroup;
+}
+
+//===----------------------------------------------------------------------===//
+
+/// Configuration values for initial hash set sizes (log2).
+///
+static const unsigned InitDiesSetSize = 9; // log2(512)
+static const unsigned InitAbbreviationsSetSize = 9; // log2(512)
+static const unsigned InitValuesSetSize = 9; // log2(512)
+
+namespace llvm {
+
+//===----------------------------------------------------------------------===//
+/// CompileUnit - This dwarf writer support class manages information associate
+/// with a source file.
+class VISIBILITY_HIDDEN CompileUnit {
+ /// ID - File identifier for source.
+ ///
+ unsigned ID;
+
+ /// Die - Compile unit debug information entry.
+ ///
+ DIE *Die;
+
+ /// GVToDieMap - Tracks the mapping of unit level debug informaton
+ /// variables to debug information entries.
+ std::map<GlobalVariable *, DIE *> GVToDieMap;
+
+ /// GVToDIEEntryMap - Tracks the mapping of unit level debug informaton
+ /// descriptors to debug information entries using a DIEEntry proxy.
+ std::map<GlobalVariable *, DIEEntry *> GVToDIEEntryMap;
+
+ /// Globals - A map of globally visible named entities for this unit.
+ ///
+ StringMap<DIE*> Globals;
+
+ /// DiesSet - Used to uniquely define dies within the compile unit.
+ ///
+ FoldingSet<DIE> DiesSet;
+public:
+ CompileUnit(unsigned I, DIE *D)
+ : ID(I), Die(D), DiesSet(InitDiesSetSize) {}
+ ~CompileUnit() { delete Die; }
+
+ // Accessors.
+ unsigned getID() const { return ID; }
+ DIE* getDie() const { return Die; }
+ StringMap<DIE*> &getGlobals() { return Globals; }
+
+ /// hasContent - Return true if this compile unit has something to write out.
+ ///
+ bool hasContent() const { return !Die->getChildren().empty(); }
+
+ /// AddGlobal - Add a new global entity to the compile unit.
+ ///
+ void AddGlobal(const std::string &Name, DIE *Die) { Globals[Name] = Die; }
+
+ /// getDieMapSlotFor - Returns the debug information entry map slot for the
+ /// specified debug variable.
+ DIE *&getDieMapSlotFor(GlobalVariable *GV) { return GVToDieMap[GV]; }
+
+ /// getDIEEntrySlotFor - Returns the debug information entry proxy slot for the
+ /// specified debug variable.
+ DIEEntry *&getDIEEntrySlotFor(GlobalVariable *GV) {
+ return GVToDIEEntryMap[GV];
+ }
+
+ /// AddDie - Adds or interns the DIE to the compile unit.
+ ///
+ DIE *AddDie(DIE &Buffer) {
+ FoldingSetNodeID ID;
+ Buffer.Profile(ID);
+ void *Where;
+ DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Die) {
+ Die = new DIE(Buffer);
+ DiesSet.InsertNode(Die, Where);
+ this->Die->AddChild(Die);
+ Buffer.Detach();
+ }
+
+ return Die;
+ }
+};
+
+//===----------------------------------------------------------------------===//
+/// DbgVariable - This class is used to track local variable information.
+///
+class VISIBILITY_HIDDEN DbgVariable {
+ DIVariable Var; // Variable Descriptor.
+ unsigned FrameIndex; // Variable frame index.
+ bool InlinedFnVar; // Variable for an inlined function.
+public:
+ DbgVariable(DIVariable V, unsigned I, bool IFV)
+ : Var(V), FrameIndex(I), InlinedFnVar(IFV) {}
+
+ // Accessors.
+ DIVariable getVariable() const { return Var; }
+ unsigned getFrameIndex() const { return FrameIndex; }
+ bool isInlinedFnVar() const { return InlinedFnVar; }
+};
+
+//===----------------------------------------------------------------------===//
+/// DbgScope - This class is used to track scope information.
+///
+class DbgConcreteScope;
+class VISIBILITY_HIDDEN DbgScope {
+ DbgScope *Parent; // Parent to this scope.
+ DIDescriptor Desc; // Debug info descriptor for scope.
+ // Either subprogram or block.
+ unsigned StartLabelID; // Label ID of the beginning of scope.
+ unsigned EndLabelID; // Label ID of the end of scope.
+ SmallVector<DbgScope *, 4> Scopes; // Scopes defined in scope.
+ SmallVector<DbgVariable *, 8> Variables;// Variables declared in scope.
+ SmallVector<DbgConcreteScope *, 8> ConcreteInsts;// Concrete insts of funcs.
+public:
+ DbgScope(DbgScope *P, DIDescriptor D)
+ : Parent(P), Desc(D), StartLabelID(0), EndLabelID(0) {}
+ virtual ~DbgScope();
+
+ // Accessors.
+ DbgScope *getParent() const { return Parent; }
+ DIDescriptor getDesc() const { return Desc; }
+ unsigned getStartLabelID() const { return StartLabelID; }
+ unsigned getEndLabelID() const { return EndLabelID; }
+ SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
+ SmallVector<DbgVariable *, 8> &getVariables() { return Variables; }
+ SmallVector<DbgConcreteScope*,8> &getConcreteInsts() { return ConcreteInsts; }
+ void setStartLabelID(unsigned S) { StartLabelID = S; }
+ void setEndLabelID(unsigned E) { EndLabelID = E; }
+
+ /// AddScope - Add a scope to the scope.
+ ///
+ void AddScope(DbgScope *S) { Scopes.push_back(S); }
+
+ /// AddVariable - Add a variable to the scope.
+ ///
+ void AddVariable(DbgVariable *V) { Variables.push_back(V); }
+
+ /// AddConcreteInst - Add a concrete instance to the scope.
+ ///
+ void AddConcreteInst(DbgConcreteScope *C) { ConcreteInsts.push_back(C); }
+
+#ifndef NDEBUG
+ void dump() const;
+#endif
+};
+
+#ifndef NDEBUG
+void DbgScope::dump() const {
+ static unsigned IndentLevel = 0;
+ std::string Indent(IndentLevel, ' ');
+
+ cerr << Indent; Desc.dump();
+ cerr << " [" << StartLabelID << ", " << EndLabelID << "]\n";
+
+ IndentLevel += 2;
+
+ for (unsigned i = 0, e = Scopes.size(); i != e; ++i)
+ if (Scopes[i] != this)
+ Scopes[i]->dump();
+
+ IndentLevel -= 2;
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+/// DbgConcreteScope - This class is used to track a scope that holds concrete
+/// instance information.
+///
+class VISIBILITY_HIDDEN DbgConcreteScope : public DbgScope {
+ CompileUnit *Unit;
+ DIE *Die; // Debug info for this concrete scope.
+public:
+ DbgConcreteScope(DIDescriptor D) : DbgScope(NULL, D) {}
+
+ // Accessors.
+ DIE *getDie() const { return Die; }
+ void setDie(DIE *D) { Die = D; }
+};
+
+DbgScope::~DbgScope() {
+ for (unsigned i = 0, N = Scopes.size(); i < N; ++i)
+ delete Scopes[i];
+ for (unsigned j = 0, M = Variables.size(); j < M; ++j)
+ delete Variables[j];
+ for (unsigned k = 0, O = ConcreteInsts.size(); k < O; ++k)
+ delete ConcreteInsts[k];
+}
+
+} // end llvm namespace
+
+DwarfDebug::DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
+ : Dwarf(OS, A, T, "dbg"), MainCU(0),
+ AbbreviationsSet(InitAbbreviationsSetSize), Abbreviations(),
+ ValuesSet(InitValuesSetSize), Values(), StringPool(), SectionMap(),
+ SectionSourceLines(), didInitial(false), shouldEmit(false),
+ FunctionDbgScope(0), DebugTimer(0) {
+ if (TimePassesIsEnabled)
+ DebugTimer = new Timer("Dwarf Debug Writer",
+ getDwarfTimerGroup());
+}
+DwarfDebug::~DwarfDebug() {
+ for (unsigned j = 0, M = Values.size(); j < M; ++j)
+ delete Values[j];
+
+ for (DenseMap<const GlobalVariable *, DbgScope *>::iterator
+ I = AbstractInstanceRootMap.begin(),
+ E = AbstractInstanceRootMap.end(); I != E;++I)
+ delete I->second;
+
+ delete DebugTimer;
+}
+
+/// AssignAbbrevNumber - Define a unique number for the abbreviation.
+///
+void DwarfDebug::AssignAbbrevNumber(DIEAbbrev &Abbrev) {
+ // Profile the node so that we can make it unique.
+ FoldingSetNodeID ID;
+ Abbrev.Profile(ID);
+
+ // Check the set for priors.
+ DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
+
+ // If it's newly added.
+ if (InSet == &Abbrev) {
+ // Add to abbreviation list.
+ Abbreviations.push_back(&Abbrev);
+
+ // Assign the vector position + 1 as its number.
+ Abbrev.setNumber(Abbreviations.size());
+ } else {
+ // Assign existing abbreviation number.
+ Abbrev.setNumber(InSet->getNumber());
+ }
+}
+
+/// CreateDIEEntry - Creates a new DIEEntry to be a proxy for a debug
+/// information entry.
+DIEEntry *DwarfDebug::CreateDIEEntry(DIE *Entry) {
+ DIEEntry *Value;
+
+ if (Entry) {
+ FoldingSetNodeID ID;
+ DIEEntry::Profile(ID, Entry);
+ void *Where;
+ Value = static_cast<DIEEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
+
+ if (Value) return Value;
+
+ Value = new DIEEntry(Entry);
+ ValuesSet.InsertNode(Value, Where);
+ } else {
+ Value = new DIEEntry(Entry);
+ }
+
+ Values.push_back(Value);
+ return Value;
+}
+
+/// SetDIEEntry - Set a DIEEntry once the debug information entry is defined.
+///
+void DwarfDebug::SetDIEEntry(DIEEntry *Value, DIE *Entry) {
+ Value->setEntry(Entry);
+
+ // Add to values set if not already there. If it is, we merely have a
+ // duplicate in the values list (no harm.)
+ ValuesSet.GetOrInsertNode(Value);
+}
+
+/// AddUInt - Add an unsigned integer attribute data and value.
+///
+void DwarfDebug::AddUInt(DIE *Die, unsigned Attribute,
+ unsigned Form, uint64_t Integer) {
+ if (!Form) Form = DIEInteger::BestForm(false, Integer);
+
+ FoldingSetNodeID ID;
+ DIEInteger::Profile(ID, Integer);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Value) {
+ Value = new DIEInteger(Integer);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+}
+
+/// AddSInt - Add an signed integer attribute data and value.
+///
+void DwarfDebug::AddSInt(DIE *Die, unsigned Attribute,
+ unsigned Form, int64_t Integer) {
+ if (!Form) Form = DIEInteger::BestForm(true, Integer);
+
+ FoldingSetNodeID ID;
+ DIEInteger::Profile(ID, (uint64_t)Integer);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Value) {
+ Value = new DIEInteger(Integer);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+}
+
+/// AddString - Add a string attribute data and value.
+///
+void DwarfDebug::AddString(DIE *Die, unsigned Attribute, unsigned Form,
+ const std::string &String) {
+ FoldingSetNodeID ID;
+ DIEString::Profile(ID, String);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Value) {
+ Value = new DIEString(String);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+}
+
+/// AddLabel - Add a Dwarf label attribute data and value.
+///
+void DwarfDebug::AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Label) {
+ FoldingSetNodeID ID;
+ DIEDwarfLabel::Profile(ID, Label);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Value) {
+ Value = new DIEDwarfLabel(Label);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+}
+
+/// AddObjectLabel - Add an non-Dwarf label attribute data and value.
+///
+void DwarfDebug::AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
+ const std::string &Label) {
+ FoldingSetNodeID ID;
+ DIEObjectLabel::Profile(ID, Label);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Value) {
+ Value = new DIEObjectLabel(Label);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+}
+
+/// AddSectionOffset - Add a section offset label attribute data and value.
+///
+void DwarfDebug::AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Label, const DWLabel &Section,
+ bool isEH, bool useSet) {
+ FoldingSetNodeID ID;
+ DIESectionOffset::Profile(ID, Label, Section);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Value) {
+ Value = new DIESectionOffset(Label, Section, isEH, useSet);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+}
+
+/// AddDelta - Add a label delta attribute data and value.
+///
+void DwarfDebug::AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Hi, const DWLabel &Lo) {
+ FoldingSetNodeID ID;
+ DIEDelta::Profile(ID, Hi, Lo);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Value) {
+ Value = new DIEDelta(Hi, Lo);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+}
+
+/// AddBlock - Add block data.
+///
+void DwarfDebug::AddBlock(DIE *Die, unsigned Attribute, unsigned Form,
+ DIEBlock *Block) {
+ Block->ComputeSize(TD);
+ FoldingSetNodeID ID;
+ Block->Profile(ID);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Value) {
+ Value = Block;
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ } else {
+ // Already exists, reuse the previous one.
+ delete Block;
+ Block = cast<DIEBlock>(Value);
+ }
+
+ Die->AddValue(Attribute, Block->BestForm(), Value);
+}
+
+/// AddSourceLine - Add location information to specified debug information
+/// entry.
+void DwarfDebug::AddSourceLine(DIE *Die, const DIVariable *V) {
+ // If there is no compile unit specified, don't add a line #.
+ if (V->getCompileUnit().isNull())
+ return;
+
+ unsigned Line = V->getLineNumber();
+ unsigned FileID = FindCompileUnit(V->getCompileUnit()).getID();
+ assert(FileID && "Invalid file id");
+ AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
+ AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
+}
+
+/// AddSourceLine - Add location information to specified debug information
+/// entry.
+void DwarfDebug::AddSourceLine(DIE *Die, const DIGlobal *G) {
+ // If there is no compile unit specified, don't add a line #.
+ if (G->getCompileUnit().isNull())
+ return;
+
+ unsigned Line = G->getLineNumber();
+ unsigned FileID = FindCompileUnit(G->getCompileUnit()).getID();
+ assert(FileID && "Invalid file id");
+ AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
+ AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
+}
+void DwarfDebug::AddSourceLine(DIE *Die, const DIType *Ty) {
+ // If there is no compile unit specified, don't add a line #.
+ DICompileUnit CU = Ty->getCompileUnit();
+ if (CU.isNull())
+ return;
+
+ unsigned Line = Ty->getLineNumber();
+ unsigned FileID = FindCompileUnit(CU).getID();
+ assert(FileID && "Invalid file id");
+ AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
+ AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
+}
+
+/// AddAddress - Add an address attribute to a die based on the location
+/// provided.
+void DwarfDebug::AddAddress(DIE *Die, unsigned Attribute,
+ const MachineLocation &Location) {
+ unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
+ DIEBlock *Block = new DIEBlock();
+
+ if (Location.isReg()) {
+ if (Reg < 32) {
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
+ } else {
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
+ AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
+ }
+ } else {
+ if (Reg < 32) {
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
+ } else {
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
+ AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
+ }
+
+ AddUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
+ }
+
+ AddBlock(Die, Attribute, 0, Block);
+}
+
+/// AddType - Add a new type attribute to the specified entity.
+void DwarfDebug::AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) {
+ if (Ty.isNull())
+ return;
+
+ // Check for pre-existence.
+ DIEEntry *&Slot = DW_Unit->getDIEEntrySlotFor(Ty.getGV());
+
+ // If it exists then use the existing value.
+ if (Slot) {
+ Entity->AddValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Slot);
+ return;
+ }
+
+ // Set up proxy.
+ Slot = CreateDIEEntry();
+
+ // Construct type.
+ DIE Buffer(dwarf::DW_TAG_base_type);
+ if (Ty.isBasicType(Ty.getTag()))
+ ConstructTypeDIE(DW_Unit, Buffer, DIBasicType(Ty.getGV()));
+ else if (Ty.isDerivedType(Ty.getTag()))
+ ConstructTypeDIE(DW_Unit, Buffer, DIDerivedType(Ty.getGV()));
+ else {
+ assert(Ty.isCompositeType(Ty.getTag()) && "Unknown kind of DIType");
+ ConstructTypeDIE(DW_Unit, Buffer, DICompositeType(Ty.getGV()));
+ }
+
+ // Add debug information entry to entity and appropriate context.
+ DIE *Die = NULL;
+ DIDescriptor Context = Ty.getContext();
+ if (!Context.isNull())
+ Die = DW_Unit->getDieMapSlotFor(Context.getGV());
+
+ if (Die) {
+ DIE *Child = new DIE(Buffer);
+ Die->AddChild(Child);
+ Buffer.Detach();
+ SetDIEEntry(Slot, Child);
+ } else {
+ Die = DW_Unit->AddDie(Buffer);
+ SetDIEEntry(Slot, Die);
+ }
+
+ Entity->AddValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Slot);
+}
+
+/// ConstructTypeDIE - Construct basic type die from DIBasicType.
+void DwarfDebug::ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DIBasicType BTy) {
+ // Get core information.
+ std::string Name;
+ BTy.getName(Name);
+ Buffer.setTag(dwarf::DW_TAG_base_type);
+ AddUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
+ BTy.getEncoding());
+
+ // Add name if not anonymous or intermediate type.
+ if (!Name.empty())
+ AddString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+ uint64_t Size = BTy.getSizeInBits() >> 3;
+ AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
+}
+
+/// ConstructTypeDIE - Construct derived type die from DIDerivedType.
+void DwarfDebug::ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DIDerivedType DTy) {
+ // Get core information.
+ std::string Name;
+ DTy.getName(Name);
+ uint64_t Size = DTy.getSizeInBits() >> 3;
+ unsigned Tag = DTy.getTag();
+
+ // FIXME - Workaround for templates.
+ if (Tag == dwarf::DW_TAG_inheritance) Tag = dwarf::DW_TAG_reference_type;
+
+ Buffer.setTag(Tag);
+
+ // Map to main type, void will not have a type.
+ DIType FromTy = DTy.getTypeDerivedFrom();
+ AddType(DW_Unit, &Buffer, FromTy);
+
+ // Add name if not anonymous or intermediate type.
+ if (!Name.empty())
+ AddString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ // Add size if non-zero (derived types might be zero-sized.)
+ if (Size)
+ AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
+
+ // Add source line info if available and TyDesc is not a forward declaration.
+ if (!DTy.isForwardDecl())
+ AddSourceLine(&Buffer, &DTy);
+}
+
+/// ConstructTypeDIE - Construct type DIE from DICompositeType.
+void DwarfDebug::ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DICompositeType CTy) {
+ // Get core information.
+ std::string Name;
+ CTy.getName(Name);
+
+ uint64_t Size = CTy.getSizeInBits() >> 3;
+ unsigned Tag = CTy.getTag();
+ Buffer.setTag(Tag);
+
+ switch (Tag) {
+ case dwarf::DW_TAG_vector_type:
+ case dwarf::DW_TAG_array_type:
+ ConstructArrayTypeDIE(DW_Unit, Buffer, &CTy);
+ break;
+ case dwarf::DW_TAG_enumeration_type: {
+ DIArray Elements = CTy.getTypeArray();
+
+ // Add enumerators to enumeration type.
+ for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
+ DIE *ElemDie = NULL;
+ DIEnumerator Enum(Elements.getElement(i).getGV());
+ ElemDie = ConstructEnumTypeDIE(DW_Unit, &Enum);
+ Buffer.AddChild(ElemDie);
+ }
+ }
+ break;
+ case dwarf::DW_TAG_subroutine_type: {
+ // Add return type.
+ DIArray Elements = CTy.getTypeArray();
+ DIDescriptor RTy = Elements.getElement(0);
+ AddType(DW_Unit, &Buffer, DIType(RTy.getGV()));
+
+ // Add prototype flag.
+ AddUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
+
+ // Add arguments.
+ for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
+ DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
+ DIDescriptor Ty = Elements.getElement(i);
+ AddType(DW_Unit, Arg, DIType(Ty.getGV()));
+ Buffer.AddChild(Arg);
+ }
+ }
+ break;
+ case dwarf::DW_TAG_structure_type:
+ case dwarf::DW_TAG_union_type:
+ case dwarf::DW_TAG_class_type: {
+ // Add elements to structure type.
+ DIArray Elements = CTy.getTypeArray();
+
+ // A forward struct declared type may not have elements available.
+ if (Elements.isNull())
+ break;
+
+ // Add elements to structure type.
+ for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
+ DIDescriptor Element = Elements.getElement(i);
+ DIE *ElemDie = NULL;
+ if (Element.getTag() == dwarf::DW_TAG_subprogram)
+ ElemDie = CreateSubprogramDIE(DW_Unit,
+ DISubprogram(Element.getGV()));
+ else if (Element.getTag() == dwarf::DW_TAG_variable) // ??
+ ElemDie = CreateGlobalVariableDIE(DW_Unit,
+ DIGlobalVariable(Element.getGV()));
+ else
+ ElemDie = CreateMemberDIE(DW_Unit,
+ DIDerivedType(Element.getGV()));
+ Buffer.AddChild(ElemDie);
+ }
+
+ // FIXME: We'd like an API to register additional attributes for the
+ // frontend to use while synthesizing, and then we'd use that api in clang
+ // instead of this.
+ if (Name == "__block_literal_generic")
+ AddUInt(&Buffer, dwarf::DW_AT_APPLE_block, dwarf::DW_FORM_flag, 1);
+
+ unsigned RLang = CTy.getRunTimeLang();
+ if (RLang)
+ AddUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
+ dwarf::DW_FORM_data1, RLang);
+ break;
+ }
+ default:
+ break;
+ }
+
+ // Add name if not anonymous or intermediate type.
+ if (!Name.empty())
+ AddString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ if (Tag == dwarf::DW_TAG_enumeration_type ||
+ Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type) {
+ // Add size if non-zero (derived types might be zero-sized.)
+ if (Size)
+ AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
+ else {
+ // Add zero size if it is not a forward declaration.
+ if (CTy.isForwardDecl())
+ AddUInt(&Buffer, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
+ else
+ AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0);
+ }
+
+ // Add source line info if available.
+ if (!CTy.isForwardDecl())
+ AddSourceLine(&Buffer, &CTy);
+ }
+}
+
+/// ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
+void DwarfDebug::ConstructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){
+ int64_t L = SR.getLo();
+ int64_t H = SR.getHi();
+ DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
+
+ if (L != H) {
+ AddDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
+ if (L)
+ AddSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
+ AddSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
+ }
+
+ Buffer.AddChild(DW_Subrange);
+}
+
+/// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
+void DwarfDebug::ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DICompositeType *CTy) {
+ Buffer.setTag(dwarf::DW_TAG_array_type);
+ if (CTy->getTag() == dwarf::DW_TAG_vector_type)
+ AddUInt(&Buffer, dwarf::DW_AT_GNU_vector, dwarf::DW_FORM_flag, 1);
+
+ // Emit derived type.
+ AddType(DW_Unit, &Buffer, CTy->getTypeDerivedFrom());
+ DIArray Elements = CTy->getTypeArray();
+
+ // Construct an anonymous type for index type.
+ DIE IdxBuffer(dwarf::DW_TAG_base_type);
+ AddUInt(&IdxBuffer, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
+ AddUInt(&IdxBuffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
+ dwarf::DW_ATE_signed);
+ DIE *IndexTy = DW_Unit->AddDie(IdxBuffer);
+
+ // Add subranges to array type.
+ for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
+ DIDescriptor Element = Elements.getElement(i);
+ if (Element.getTag() == dwarf::DW_TAG_subrange_type)
+ ConstructSubrangeDIE(Buffer, DISubrange(Element.getGV()), IndexTy);
+ }
+}
+
+/// ConstructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
+DIE *DwarfDebug::ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy) {
+ DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
+ std::string Name;
+ ETy->getName(Name);
+ AddString(Enumerator, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+ int64_t Value = ETy->getEnumValue();
+ AddSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
+ return Enumerator;
+}
+
+/// CreateGlobalVariableDIE - Create new DIE using GV.
+DIE *DwarfDebug::CreateGlobalVariableDIE(CompileUnit *DW_Unit,
+ const DIGlobalVariable &GV) {
+ DIE *GVDie = new DIE(dwarf::DW_TAG_variable);
+ std::string Name;
+ GV.getDisplayName(Name);
+ AddString(GVDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+ std::string LinkageName;
+ GV.getLinkageName(LinkageName);
+ if (!LinkageName.empty())
+ AddString(GVDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
+ LinkageName);
+ AddType(DW_Unit, GVDie, GV.getType());
+ if (!GV.isLocalToUnit())
+ AddUInt(GVDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
+ AddSourceLine(GVDie, &GV);
+ return GVDie;
+}
+
+/// CreateMemberDIE - Create new member DIE.
+DIE *DwarfDebug::CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT){
+ DIE *MemberDie = new DIE(DT.getTag());
+ std::string Name;
+ DT.getName(Name);
+ if (!Name.empty())
+ AddString(MemberDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ AddType(DW_Unit, MemberDie, DT.getTypeDerivedFrom());
+
+ AddSourceLine(MemberDie, &DT);
+
+ uint64_t Size = DT.getSizeInBits();
+ uint64_t FieldSize = DT.getOriginalTypeSize();
+
+ if (Size != FieldSize) {
+ // Handle bitfield.
+ AddUInt(MemberDie, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3);
+ AddUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits());
+
+ uint64_t Offset = DT.getOffsetInBits();
+ uint64_t FieldOffset = Offset;
+ uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
+ uint64_t HiMark = (Offset + FieldSize) & AlignMask;
+ FieldOffset = (HiMark - FieldSize);
+ Offset -= FieldOffset;
+
+ // Maybe we need to work from the other end.
+ if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
+ AddUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset);
+ }
+
+ DIEBlock *Block = new DIEBlock();
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
+ AddUInt(Block, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
+ AddBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, Block);
+
+ if (DT.isProtected())
+ AddUInt(MemberDie, dwarf::DW_AT_accessibility, 0,
+ dwarf::DW_ACCESS_protected);
+ else if (DT.isPrivate())
+ AddUInt(MemberDie, dwarf::DW_AT_accessibility, 0,
+ dwarf::DW_ACCESS_private);
+
+ return MemberDie;
+}
+
+/// CreateSubprogramDIE - Create new DIE using SP.
+DIE *DwarfDebug::CreateSubprogramDIE(CompileUnit *DW_Unit,
+ const DISubprogram &SP,
+ bool IsConstructor,
+ bool IsInlined) {
+ DIE *SPDie = new DIE(dwarf::DW_TAG_subprogram);
+
+ std::string Name;
+ SP.getName(Name);
+ AddString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ std::string LinkageName;
+ SP.getLinkageName(LinkageName);
+
+ if (!LinkageName.empty())
+ AddString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
+ LinkageName);
+
+ AddSourceLine(SPDie, &SP);
+
+ DICompositeType SPTy = SP.getType();
+ DIArray Args = SPTy.getTypeArray();
+
+ // Add prototyped tag, if C or ObjC.
+ unsigned Lang = SP.getCompileUnit().getLanguage();
+ if (Lang == dwarf::DW_LANG_C99 || Lang == dwarf::DW_LANG_C89 ||
+ Lang == dwarf::DW_LANG_ObjC)
+ AddUInt(SPDie, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
+
+ // Add Return Type.
+ unsigned SPTag = SPTy.getTag();
+ if (!IsConstructor) {
+ if (Args.isNull() || SPTag != dwarf::DW_TAG_subroutine_type)
+ AddType(DW_Unit, SPDie, SPTy);
+ else
+ AddType(DW_Unit, SPDie, DIType(Args.getElement(0).getGV()));
+ }
+
+ if (!SP.isDefinition()) {
+ AddUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
+
+ // Add arguments. Do not add arguments for subprogram definition. They will
+ // be handled through RecordVariable.
+ if (SPTag == dwarf::DW_TAG_subroutine_type)
+ for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
+ DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
+ AddType(DW_Unit, Arg, DIType(Args.getElement(i).getGV()));
+ AddUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); // ??
+ SPDie->AddChild(Arg);
+ }
+ }
+
+ if (!SP.isLocalToUnit() && !IsInlined)
+ AddUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
+
+ // DW_TAG_inlined_subroutine may refer to this DIE.
+ DIE *&Slot = DW_Unit->getDieMapSlotFor(SP.getGV());
+ Slot = SPDie;
+ return SPDie;
+}
+
+/// FindCompileUnit - Get the compile unit for the given descriptor.
+///
+CompileUnit &DwarfDebug::FindCompileUnit(DICompileUnit Unit) const {
+ DenseMap<Value *, CompileUnit *>::const_iterator I =
+ CompileUnitMap.find(Unit.getGV());
+ assert(I != CompileUnitMap.end() && "Missing compile unit.");
+ return *I->second;
+}
+
+/// CreateDbgScopeVariable - Create a new scope variable.
+///
+DIE *DwarfDebug::CreateDbgScopeVariable(DbgVariable *DV, CompileUnit *Unit) {
+ // Get the descriptor.
+ const DIVariable &VD = DV->getVariable();
+
+ // Translate tag to proper Dwarf tag. The result variable is dropped for
+ // now.
+ unsigned Tag;
+ switch (VD.getTag()) {
+ case dwarf::DW_TAG_return_variable:
+ return NULL;
+ case dwarf::DW_TAG_arg_variable:
+ Tag = dwarf::DW_TAG_formal_parameter;
+ break;
+ case dwarf::DW_TAG_auto_variable: // fall thru
+ default:
+ Tag = dwarf::DW_TAG_variable;
+ break;
+ }
+
+ // Define variable debug information entry.
+ DIE *VariableDie = new DIE(Tag);
+ std::string Name;
+ VD.getName(Name);
+ AddString(VariableDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ // Add source line info if available.
+ AddSourceLine(VariableDie, &VD);
+
+ // Add variable type.
+ AddType(Unit, VariableDie, VD.getType());
+
+ // Add variable address.
+ if (!DV->isInlinedFnVar()) {
+ // Variables for abstract instances of inlined functions don't get a
+ // location.
+ MachineLocation Location;
+ Location.set(RI->getFrameRegister(*MF),
+ RI->getFrameIndexOffset(*MF, DV->getFrameIndex()));
+ AddAddress(VariableDie, dwarf::DW_AT_location, Location);
+ }
+
+ return VariableDie;
+}
+
+/// getOrCreateScope - Returns the scope associated with the given descriptor.
+///
+DbgScope *DwarfDebug::getOrCreateScope(GlobalVariable *V) {
+ DbgScope *&Slot = DbgScopeMap[V];
+ if (Slot) return Slot;
+
+ DbgScope *Parent = NULL;
+ DIBlock Block(V);
+
+ // Don't create a new scope if we already created one for an inlined function.
+ DenseMap<const GlobalVariable *, DbgScope *>::iterator
+ II = AbstractInstanceRootMap.find(V);
+ if (II != AbstractInstanceRootMap.end())
+ return LexicalScopeStack.back();
+
+ if (!Block.isNull()) {
+ DIDescriptor ParentDesc = Block.getContext();
+ Parent =
+ ParentDesc.isNull() ? NULL : getOrCreateScope(ParentDesc.getGV());
+ }
+
+ Slot = new DbgScope(Parent, DIDescriptor(V));
+
+ if (Parent)
+ Parent->AddScope(Slot);
+ else
+ // First function is top level function.
+ FunctionDbgScope = Slot;
+
+ return Slot;
+}
+
+/// ConstructDbgScope - Construct the components of a scope.
+///
+void DwarfDebug::ConstructDbgScope(DbgScope *ParentScope,
+ unsigned ParentStartID,
+ unsigned ParentEndID,
+ DIE *ParentDie, CompileUnit *Unit) {
+ // Add variables to scope.
+ SmallVector<DbgVariable *, 8> &Variables = ParentScope->getVariables();
+ for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
+ DIE *VariableDie = CreateDbgScopeVariable(Variables[i], Unit);
+ if (VariableDie) ParentDie->AddChild(VariableDie);
+ }
+
+ // Add concrete instances to scope.
+ SmallVector<DbgConcreteScope *, 8> &ConcreteInsts =
+ ParentScope->getConcreteInsts();
+ for (unsigned i = 0, N = ConcreteInsts.size(); i < N; ++i) {
+ DbgConcreteScope *ConcreteInst = ConcreteInsts[i];
+ DIE *Die = ConcreteInst->getDie();
+
+ unsigned StartID = ConcreteInst->getStartLabelID();
+ unsigned EndID = ConcreteInst->getEndLabelID();
+
+ // Add the scope bounds.
+ if (StartID)
+ AddLabel(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("label", StartID));
+ else
+ AddLabel(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+
+ if (EndID)
+ AddLabel(Die, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("label", EndID));
+ else
+ AddLabel(Die, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+
+ ParentDie->AddChild(Die);
+ }
+
+ // Add nested scopes.
+ SmallVector<DbgScope *, 4> &Scopes = ParentScope->getScopes();
+ for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
+ // Define the Scope debug information entry.
+ DbgScope *Scope = Scopes[j];
+
+ unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
+ unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
+
+ // Ignore empty scopes.
+ if (StartID == EndID && StartID != 0) continue;
+
+ // Do not ignore inlined scopes even if they don't have any variables or
+ // scopes.
+ if (Scope->getScopes().empty() && Scope->getVariables().empty() &&
+ Scope->getConcreteInsts().empty())
+ continue;
+
+ if (StartID == ParentStartID && EndID == ParentEndID) {
+ // Just add stuff to the parent scope.
+ ConstructDbgScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit);
+ } else {
+ DIE *ScopeDie = new DIE(dwarf::DW_TAG_lexical_block);
+
+ // Add the scope bounds.
+ if (StartID)
+ AddLabel(ScopeDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("label", StartID));
+ else
+ AddLabel(ScopeDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+
+ if (EndID)
+ AddLabel(ScopeDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("label", EndID));
+ else
+ AddLabel(ScopeDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+
+ // Add the scope's contents.
+ ConstructDbgScope(Scope, StartID, EndID, ScopeDie, Unit);
+ ParentDie->AddChild(ScopeDie);
+ }
+ }
+}
+
+/// ConstructFunctionDbgScope - Construct the scope for the subprogram.
+///
+void DwarfDebug::ConstructFunctionDbgScope(DbgScope *RootScope,
+ bool AbstractScope) {
+ // Exit if there is no root scope.
+ if (!RootScope) return;
+ DIDescriptor Desc = RootScope->getDesc();
+ if (Desc.isNull())
+ return;
+
+ // Get the subprogram debug information entry.
+ DISubprogram SPD(Desc.getGV());
+
+ // Get the compile unit context.
+ CompileUnit *Unit = MainCU;
+ if (!Unit)
+ Unit = &FindCompileUnit(SPD.getCompileUnit());
+
+ // Get the subprogram die.
+ DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
+ assert(SPDie && "Missing subprogram descriptor");
+
+ if (!AbstractScope) {
+ // Add the function bounds.
+ AddLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+ AddLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+ MachineLocation Location(RI->getFrameRegister(*MF));
+ AddAddress(SPDie, dwarf::DW_AT_frame_base, Location);
+ }
+
+ ConstructDbgScope(RootScope, 0, 0, SPDie, Unit);
+}
+
+/// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
+///
+void DwarfDebug::ConstructDefaultDbgScope(MachineFunction *MF) {
+ const char *FnName = MF->getFunction()->getNameStart();
+ if (MainCU) {
+ StringMap<DIE*> &Globals = MainCU->getGlobals();
+ StringMap<DIE*>::iterator GI = Globals.find(FnName);
+ if (GI != Globals.end()) {
+ DIE *SPDie = GI->second;
+
+ // Add the function bounds.
+ AddLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+ AddLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+
+ MachineLocation Location(RI->getFrameRegister(*MF));
+ AddAddress(SPDie, dwarf::DW_AT_frame_base, Location);
+ return;
+ }
+ } else {
+ for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
+ CompileUnit *Unit = CompileUnits[i];
+ StringMap<DIE*> &Globals = Unit->getGlobals();
+ StringMap<DIE*>::iterator GI = Globals.find(FnName);
+ if (GI != Globals.end()) {
+ DIE *SPDie = GI->second;
+
+ // Add the function bounds.
+ AddLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+ AddLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+
+ MachineLocation Location(RI->getFrameRegister(*MF));
+ AddAddress(SPDie, dwarf::DW_AT_frame_base, Location);
+ return;
+ }
+ }
+ }
+
+#if 0
+ // FIXME: This is causing an abort because C++ mangled names are compared with
+ // their unmangled counterparts. See PR2885. Don't do this assert.
+ assert(0 && "Couldn't find DIE for machine function!");
+#endif
+}
+
+/// GetOrCreateSourceID - Look up the source id with the given directory and
+/// source file names. If none currently exists, create a new id and insert it
+/// in the SourceIds map. This can update DirectoryNames and SourceFileNames
+/// maps as well.
+unsigned DwarfDebug::GetOrCreateSourceID(const std::string &DirName,
+ const std::string &FileName) {
+ unsigned DId;
+ StringMap<unsigned>::iterator DI = DirectoryIdMap.find(DirName);
+ if (DI != DirectoryIdMap.end()) {
+ DId = DI->getValue();
+ } else {
+ DId = DirectoryNames.size() + 1;
+ DirectoryIdMap[DirName] = DId;
+ DirectoryNames.push_back(DirName);
+ }
+
+ unsigned FId;
+ StringMap<unsigned>::iterator FI = SourceFileIdMap.find(FileName);
+ if (FI != SourceFileIdMap.end()) {
+ FId = FI->getValue();
+ } else {
+ FId = SourceFileNames.size() + 1;
+ SourceFileIdMap[FileName] = FId;
+ SourceFileNames.push_back(FileName);
+ }
+
+ DenseMap<std::pair<unsigned, unsigned>, unsigned>::iterator SI =
+ SourceIdMap.find(std::make_pair(DId, FId));
+ if (SI != SourceIdMap.end())
+ return SI->second;
+
+ unsigned SrcId = SourceIds.size() + 1; // DW_AT_decl_file cannot be 0.
+ SourceIdMap[std::make_pair(DId, FId)] = SrcId;
+ SourceIds.push_back(std::make_pair(DId, FId));
+
+ return SrcId;
+}
+
+void DwarfDebug::ConstructCompileUnit(GlobalVariable *GV) {
+ DICompileUnit DIUnit(GV);
+ std::string Dir, FN, Prod;
+ unsigned ID = GetOrCreateSourceID(DIUnit.getDirectory(Dir),
+ DIUnit.getFilename(FN));
+
+ DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
+ AddSectionOffset(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
+ DWLabel("section_line", 0), DWLabel("section_line", 0),
+ false);
+ AddString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string,
+ DIUnit.getProducer(Prod));
+ AddUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data1,
+ DIUnit.getLanguage());
+ AddString(Die, dwarf::DW_AT_name, dwarf::DW_FORM_string, FN);
+
+ if (!Dir.empty())
+ AddString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir);
+ if (DIUnit.isOptimized())
+ AddUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
+
+ std::string Flags;
+ DIUnit.getFlags(Flags);
+ if (!Flags.empty())
+ AddString(Die, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string, Flags);
+
+ unsigned RVer = DIUnit.getRunTimeVersion();
+ if (RVer)
+ AddUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers,
+ dwarf::DW_FORM_data1, RVer);
+
+ CompileUnit *Unit = new CompileUnit(ID, Die);
+ if (DIUnit.isMain()) {
+ assert(!MainCU && "Multiple main compile units are found!");
+ MainCU = Unit;
+ }
+
+ CompileUnitMap[DIUnit.getGV()] = Unit;
+ CompileUnits.push_back(Unit);
+}
+
+/// ConstructCompileUnits - Create a compile unit DIEs.
+void DwarfDebug::ConstructCompileUnits() {
+ GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.compile_units");
+ if (!Root)
+ return;
+ assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
+ "Malformed compile unit descriptor anchor type");
+ Constant *RootC = cast<Constant>(*Root->use_begin());
+ assert(RootC->hasNUsesOrMore(1) &&
+ "Malformed compile unit descriptor anchor type");
+
+ for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
+ UI != UE; ++UI)
+ for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
+ UUI != UUE; ++UUI) {
+ GlobalVariable *GV = cast<GlobalVariable>(*UUI);
+ ConstructCompileUnit(GV);
+ }
+}
+
+bool DwarfDebug::ConstructGlobalVariableDIE(GlobalVariable *GV) {
+ DIGlobalVariable DI_GV(GV);
+ CompileUnit *DW_Unit = MainCU;
+ if (!DW_Unit)
+ DW_Unit = &FindCompileUnit(DI_GV.getCompileUnit());
+
+ // Check for pre-existence.
+ DIE *&Slot = DW_Unit->getDieMapSlotFor(DI_GV.getGV());
+ if (Slot)
+ return false;
+
+ DIE *VariableDie = CreateGlobalVariableDIE(DW_Unit, DI_GV);
+
+ // Add address.
+ DIEBlock *Block = new DIEBlock();
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
+ std::string GLN;
+ AddObjectLabel(Block, 0, dwarf::DW_FORM_udata,
+ Asm->getGlobalLinkName(DI_GV.getGlobal(), GLN));
+ AddBlock(VariableDie, dwarf::DW_AT_location, 0, Block);
+
+ // Add to map.
+ Slot = VariableDie;
+
+ // Add to context owner.
+ DW_Unit->getDie()->AddChild(VariableDie);
+
+ // Expose as global. FIXME - need to check external flag.
+ std::string Name;
+ DW_Unit->AddGlobal(DI_GV.getName(Name), VariableDie);
+ return true;
+}
+
+/// ConstructGlobalVariableDIEs - Create DIEs for each of the externally visible
+/// global variables. Return true if at least one global DIE is created.
+bool DwarfDebug::ConstructGlobalVariableDIEs() {
+ GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.global_variables");
+ if (!Root)
+ return false;
+
+ assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
+ "Malformed global variable descriptor anchor type");
+ Constant *RootC = cast<Constant>(*Root->use_begin());
+ assert(RootC->hasNUsesOrMore(1) &&
+ "Malformed global variable descriptor anchor type");
+
+ bool Result = false;
+ for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
+ UI != UE; ++UI)
+ for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
+ UUI != UUE; ++UUI)
+ Result |= ConstructGlobalVariableDIE(cast<GlobalVariable>(*UUI));
+
+ return Result;
+}
+
+bool DwarfDebug::ConstructSubprogram(GlobalVariable *GV) {
+ DISubprogram SP(GV);
+ CompileUnit *Unit = MainCU;
+ if (!Unit)
+ Unit = &FindCompileUnit(SP.getCompileUnit());
+
+ // Check for pre-existence.
+ DIE *&Slot = Unit->getDieMapSlotFor(GV);
+ if (Slot)
+ return false;
+
+ if (!SP.isDefinition())
+ // This is a method declaration which will be handled while constructing
+ // class type.
+ return false;
+
+ DIE *SubprogramDie = CreateSubprogramDIE(Unit, SP);
+
+ // Add to map.
+ Slot = SubprogramDie;
+
+ // Add to context owner.
+ Unit->getDie()->AddChild(SubprogramDie);
+
+ // Expose as global.
+ std::string Name;
+ Unit->AddGlobal(SP.getName(Name), SubprogramDie);
+ return true;
+}
+
+/// ConstructSubprograms - Create DIEs for each of the externally visible
+/// subprograms. Return true if at least one subprogram DIE is created.
+bool DwarfDebug::ConstructSubprograms() {
+ GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.subprograms");
+ if (!Root)
+ return false;
+
+ assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
+ "Malformed subprogram descriptor anchor type");
+ Constant *RootC = cast<Constant>(*Root->use_begin());
+ assert(RootC->hasNUsesOrMore(1) &&
+ "Malformed subprogram descriptor anchor type");
+
+ bool Result = false;
+ for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
+ UI != UE; ++UI)
+ for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
+ UUI != UUE; ++UUI)
+ Result |= ConstructSubprogram(cast<GlobalVariable>(*UUI));
+
+ return Result;
+}
+
+/// SetDebugInfo - Create global DIEs and emit initial debug info sections.
+/// This is inovked by the target AsmPrinter.
+void DwarfDebug::SetDebugInfo(MachineModuleInfo *mmi) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ // Create all the compile unit DIEs.
+ ConstructCompileUnits();
+
+ if (CompileUnits.empty()) {
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return;
+ }
+
+ // Create DIEs for each of the externally visible global variables.
+ bool globalDIEs = ConstructGlobalVariableDIEs();
+
+ // Create DIEs for each of the externally visible subprograms.
+ bool subprogramDIEs = ConstructSubprograms();
+
+ // If there is not any debug info available for any global variables and any
+ // subprograms then there is not any debug info to emit.
+ if (!globalDIEs && !subprogramDIEs) {
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return;
+ }
+
+ MMI = mmi;
+ shouldEmit = true;
+ MMI->setDebugInfoAvailability(true);
+
+ // Prime section data.
+ SectionMap.insert(TAI->getTextSection());
+
+ // Print out .file directives to specify files for .loc directives. These are
+ // printed out early so that they precede any .loc directives.
+ if (TAI->hasDotLocAndDotFile()) {
+ for (unsigned i = 1, e = getNumSourceIds()+1; i != e; ++i) {
+ // Remember source id starts at 1.
+ std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(i);
+ sys::Path FullPath(getSourceDirectoryName(Id.first));
+ bool AppendOk =
+ FullPath.appendComponent(getSourceFileName(Id.second));
+ assert(AppendOk && "Could not append filename to directory!");
+ AppendOk = false;
+ Asm->EmitFile(i, FullPath.toString());
+ Asm->EOL();
+ }
+ }
+
+ // Emit initial sections
+ EmitInitial();
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+/// EndModule - Emit all Dwarf sections that should come after the content.
+///
+void DwarfDebug::EndModule() {
+ if (!ShouldEmitDwarfDebug())
+ return;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ // Standard sections final addresses.
+ Asm->SwitchToSection(TAI->getTextSection());
+ EmitLabel("text_end", 0);
+ Asm->SwitchToSection(TAI->getDataSection());
+ EmitLabel("data_end", 0);
+
+ // End text sections.
+ for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
+ Asm->SwitchToSection(SectionMap[i]);
+ EmitLabel("section_end", i);
+ }
+
+ // Emit common frame information.
+ EmitCommonDebugFrame();
+
+ // Emit function debug frame information
+ for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
+ E = DebugFrames.end(); I != E; ++I)
+ EmitFunctionDebugFrame(*I);
+
+ // Compute DIE offsets and sizes.
+ SizeAndOffsets();
+
+ // Emit all the DIEs into a debug info section
+ EmitDebugInfo();
+
+ // Corresponding abbreviations into a abbrev section.
+ EmitAbbreviations();
+
+ // Emit source line correspondence into a debug line section.
+ EmitDebugLines();
+
+ // Emit info into a debug pubnames section.
+ EmitDebugPubNames();
+
+ // Emit info into a debug str section.
+ EmitDebugStr();
+
+ // Emit info into a debug loc section.
+ EmitDebugLoc();
+
+ // Emit info into a debug aranges section.
+ EmitDebugARanges();
+
+ // Emit info into a debug ranges section.
+ EmitDebugRanges();
+
+ // Emit info into a debug macinfo section.
+ EmitDebugMacInfo();
+
+ // Emit inline info.
+ EmitDebugInlineInfo();
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+/// BeginFunction - Gather pre-function debug information. Assumes being
+/// emitted immediately after the function entry point.
+void DwarfDebug::BeginFunction(MachineFunction *MF) {
+ this->MF = MF;
+
+ if (!ShouldEmitDwarfDebug()) return;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ // Begin accumulating function debug information.
+ MMI->BeginFunction(MF);
+
+ // Assumes in correct section after the entry point.
+ EmitLabel("func_begin", ++SubprogramCount);
+
+ // Emit label for the implicitly defined dbg.stoppoint at the start of the
+ // function.
+ DebugLoc FDL = MF->getDefaultDebugLoc();
+ if (!FDL.isUnknown()) {
+ DebugLocTuple DLT = MF->getDebugLocTuple(FDL);
+ unsigned LabelID = RecordSourceLine(DLT.Line, DLT.Col,
+ DICompileUnit(DLT.CompileUnit));
+ Asm->printLabel(LabelID);
+ }
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+/// EndFunction - Gather and emit post-function debug information.
+///
+void DwarfDebug::EndFunction(MachineFunction *MF) {
+ if (!ShouldEmitDwarfDebug()) return;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ // Define end label for subprogram.
+ EmitLabel("func_end", SubprogramCount);
+
+ // Get function line info.
+ if (!Lines.empty()) {
+ // Get section line info.
+ unsigned ID = SectionMap.insert(Asm->CurrentSection_);
+ if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
+ std::vector<SrcLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
+ // Append the function info to section info.
+ SectionLineInfos.insert(SectionLineInfos.end(),
+ Lines.begin(), Lines.end());
+ }
+
+ // Construct the DbgScope for abstract instances.
+ for (SmallVector<DbgScope *, 32>::iterator
+ I = AbstractInstanceRootList.begin(),
+ E = AbstractInstanceRootList.end(); I != E; ++I)
+ ConstructFunctionDbgScope(*I);
+
+ // Construct scopes for subprogram.
+ if (FunctionDbgScope)
+ ConstructFunctionDbgScope(FunctionDbgScope);
+ else
+ // FIXME: This is wrong. We are essentially getting past a problem with
+ // debug information not being able to handle unreachable blocks that have
+ // debug information in them. In particular, those unreachable blocks that
+ // have "region end" info in them. That situation results in the "root
+ // scope" not being created. If that's the case, then emit a "default"
+ // scope, i.e., one that encompasses the whole function. This isn't
+ // desirable. And a better way of handling this (and all of the debugging
+ // information) needs to be explored.
+ ConstructDefaultDbgScope(MF);
+
+ DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
+ MMI->getFrameMoves()));
+
+ // Clear debug info
+ if (FunctionDbgScope) {
+ delete FunctionDbgScope;
+ DbgScopeMap.clear();
+ DbgAbstractScopeMap.clear();
+ DbgConcreteScopeMap.clear();
+ InlinedVariableScopes.clear();
+ FunctionDbgScope = NULL;
+ LexicalScopeStack.clear();
+ AbstractInstanceRootList.clear();
+ }
+
+ Lines.clear();
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+/// RecordSourceLine - Records location information and associates it with a
+/// label. Returns a unique label ID used to generate a label and provide
+/// correspondence to the source line list.
+unsigned DwarfDebug::RecordSourceLine(Value *V, unsigned Line, unsigned Col) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ CompileUnit *Unit = CompileUnitMap[V];
+ assert(Unit && "Unable to find CompileUnit");
+ unsigned ID = MMI->NextLabelID();
+ Lines.push_back(SrcLineInfo(Line, Col, Unit->getID(), ID));
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return ID;
+}
+
+/// RecordSourceLine - Records location information and associates it with a
+/// label. Returns a unique label ID used to generate a label and provide
+/// correspondence to the source line list.
+unsigned DwarfDebug::RecordSourceLine(unsigned Line, unsigned Col,
+ DICompileUnit CU) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ std::string Dir, Fn;
+ unsigned Src = GetOrCreateSourceID(CU.getDirectory(Dir),
+ CU.getFilename(Fn));
+ unsigned ID = MMI->NextLabelID();
+ Lines.push_back(SrcLineInfo(Line, Col, Src, ID));
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return ID;
+}
+
+/// getOrCreateSourceID - Public version of GetOrCreateSourceID. This can be
+/// timed. Look up the source id with the given directory and source file
+/// names. If none currently exists, create a new id and insert it in the
+/// SourceIds map. This can update DirectoryNames and SourceFileNames maps as
+/// well.
+unsigned DwarfDebug::getOrCreateSourceID(const std::string &DirName,
+ const std::string &FileName) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ unsigned SrcId = GetOrCreateSourceID(DirName, FileName);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return SrcId;
+}
+
+/// RecordRegionStart - Indicate the start of a region.
+unsigned DwarfDebug::RecordRegionStart(GlobalVariable *V) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ DbgScope *Scope = getOrCreateScope(V);
+ unsigned ID = MMI->NextLabelID();
+ if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
+ LexicalScopeStack.push_back(Scope);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return ID;
+}
+
+/// RecordRegionEnd - Indicate the end of a region.
+unsigned DwarfDebug::RecordRegionEnd(GlobalVariable *V) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ DbgScope *Scope = getOrCreateScope(V);
+ unsigned ID = MMI->NextLabelID();
+ Scope->setEndLabelID(ID);
+ if (LexicalScopeStack.size() != 0)
+ LexicalScopeStack.pop_back();
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return ID;
+}
+
+/// RecordVariable - Indicate the declaration of a local variable.
+void DwarfDebug::RecordVariable(GlobalVariable *GV, unsigned FrameIndex,
+ const MachineInstr *MI) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ DIDescriptor Desc(GV);
+ DbgScope *Scope = NULL;
+ bool InlinedFnVar = false;
+
+ if (Desc.getTag() == dwarf::DW_TAG_variable) {
+ // GV is a global variable.
+ DIGlobalVariable DG(GV);
+ Scope = getOrCreateScope(DG.getContext().getGV());
+ } else {
+ DenseMap<const MachineInstr *, DbgScope *>::iterator
+ SI = InlinedVariableScopes.find(MI);
+
+ if (SI != InlinedVariableScopes.end()) {
+ // or GV is an inlined local variable.
+ Scope = SI->second;
+ } else {
+ DIVariable DV(GV);
+ GlobalVariable *V = DV.getContext().getGV();
+
+ // FIXME: The code that checks for the inlined local variable is a hack!
+ DenseMap<const GlobalVariable *, DbgScope *>::iterator
+ AI = AbstractInstanceRootMap.find(V);
+
+ if (AI != AbstractInstanceRootMap.end()) {
+ // This method is called each time a DECLARE node is encountered. For an
+ // inlined function, this could be many, many times. We don't want to
+ // re-add variables to that DIE for each time. We just want to add them
+ // once. Check to make sure that we haven't added them already.
+ DenseMap<const GlobalVariable *,
+ SmallSet<const GlobalVariable *, 32> >::iterator
+ IP = InlinedParamMap.find(V);
+
+ if (IP != InlinedParamMap.end() && IP->second.count(GV) > 0) {
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+ return;
+ }
+
+ // or GV is an inlined local variable.
+ Scope = AI->second;
+ InlinedParamMap[V].insert(GV);
+ InlinedFnVar = true;
+ } else {
+ // or GV is a local variable.
+ Scope = getOrCreateScope(V);
+ }
+ }
+ }
+
+ assert(Scope && "Unable to find the variable's scope");
+ DbgVariable *DV = new DbgVariable(DIVariable(GV), FrameIndex, InlinedFnVar);
+ Scope->AddVariable(DV);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+//// RecordInlinedFnStart - Indicate the start of inlined subroutine.
+unsigned DwarfDebug::RecordInlinedFnStart(DISubprogram &SP, DICompileUnit CU,
+ unsigned Line, unsigned Col) {
+ unsigned LabelID = MMI->NextLabelID();
+
+ if (!TAI->doesDwarfUsesInlineInfoSection())
+ return LabelID;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ GlobalVariable *GV = SP.getGV();
+ DenseMap<const GlobalVariable *, DbgScope *>::iterator
+ II = AbstractInstanceRootMap.find(GV);
+
+ if (II == AbstractInstanceRootMap.end()) {
+ // Create an abstract instance entry for this inlined function if it doesn't
+ // already exist.
+ DbgScope *Scope = new DbgScope(NULL, DIDescriptor(GV));
+
+ // Get the compile unit context.
+ CompileUnit *Unit = &FindCompileUnit(SP.getCompileUnit());
+ DIE *SPDie = Unit->getDieMapSlotFor(GV);
+ if (!SPDie)
+ SPDie = CreateSubprogramDIE(Unit, SP, false, true);
+
+ // Mark as being inlined. This makes this subprogram entry an abstract
+ // instance root.
+ // FIXME: Our debugger doesn't care about the value of DW_AT_inline, only
+ // that it's defined. That probably won't change in the future. However,
+ // this could be more elegant.
+ AddUInt(SPDie, dwarf::DW_AT_inline, 0, dwarf::DW_INL_declared_not_inlined);
+
+ // Keep track of the abstract scope for this function.
+ DbgAbstractScopeMap[GV] = Scope;
+
+ AbstractInstanceRootMap[GV] = Scope;
+ AbstractInstanceRootList.push_back(Scope);
+ }
+
+ // Create a concrete inlined instance for this inlined function.
+ DbgConcreteScope *ConcreteScope = new DbgConcreteScope(DIDescriptor(GV));
+ DIE *ScopeDie = new DIE(dwarf::DW_TAG_inlined_subroutine);
+ CompileUnit *Unit = &FindCompileUnit(SP.getCompileUnit());
+ ScopeDie->setAbstractCompileUnit(Unit);
+
+ DIE *Origin = Unit->getDieMapSlotFor(GV);
+ AddDIEEntry(ScopeDie, dwarf::DW_AT_abstract_origin,
+ dwarf::DW_FORM_ref4, Origin);
+ AddUInt(ScopeDie, dwarf::DW_AT_call_file, 0, Unit->getID());
+ AddUInt(ScopeDie, dwarf::DW_AT_call_line, 0, Line);
+ AddUInt(ScopeDie, dwarf::DW_AT_call_column, 0, Col);
+
+ ConcreteScope->setDie(ScopeDie);
+ ConcreteScope->setStartLabelID(LabelID);
+ MMI->RecordUsedDbgLabel(LabelID);
+
+ LexicalScopeStack.back()->AddConcreteInst(ConcreteScope);
+
+ // Keep track of the concrete scope that's inlined into this function.
+ DenseMap<GlobalVariable *, SmallVector<DbgScope *, 8> >::iterator
+ SI = DbgConcreteScopeMap.find(GV);
+
+ if (SI == DbgConcreteScopeMap.end())
+ DbgConcreteScopeMap[GV].push_back(ConcreteScope);
+ else
+ SI->second.push_back(ConcreteScope);
+
+ // Track the start label for this inlined function.
+ DenseMap<GlobalVariable *, SmallVector<unsigned, 4> >::iterator
+ I = InlineInfo.find(GV);
+
+ if (I == InlineInfo.end())
+ InlineInfo[GV].push_back(LabelID);
+ else
+ I->second.push_back(LabelID);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return LabelID;
+}
+
+/// RecordInlinedFnEnd - Indicate the end of inlined subroutine.
+unsigned DwarfDebug::RecordInlinedFnEnd(DISubprogram &SP) {
+ if (!TAI->doesDwarfUsesInlineInfoSection())
+ return 0;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ GlobalVariable *GV = SP.getGV();
+ DenseMap<GlobalVariable *, SmallVector<DbgScope *, 8> >::iterator
+ I = DbgConcreteScopeMap.find(GV);
+
+ if (I == DbgConcreteScopeMap.end()) {
+ // FIXME: Can this situation actually happen? And if so, should it?
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return 0;
+ }
+
+ SmallVector<DbgScope *, 8> &Scopes = I->second;
+ assert(!Scopes.empty() && "We should have at least one debug scope!");
+ DbgScope *Scope = Scopes.back(); Scopes.pop_back();
+ unsigned ID = MMI->NextLabelID();
+ MMI->RecordUsedDbgLabel(ID);
+ Scope->setEndLabelID(ID);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return ID;
+}
+
+/// RecordVariableScope - Record scope for the variable declared by
+/// DeclareMI. DeclareMI must describe TargetInstrInfo::DECLARE. Record scopes
+/// for only inlined subroutine variables. Other variables's scopes are
+/// determined during RecordVariable().
+void DwarfDebug::RecordVariableScope(DIVariable &DV,
+ const MachineInstr *DeclareMI) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ DISubprogram SP(DV.getContext().getGV());
+
+ if (SP.isNull()) {
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return;
+ }
+
+ DenseMap<GlobalVariable *, DbgScope *>::iterator
+ I = DbgAbstractScopeMap.find(SP.getGV());
+ if (I != DbgAbstractScopeMap.end())
+ InlinedVariableScopes[DeclareMI] = I->second;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+//===----------------------------------------------------------------------===//
+// Emit Methods
+//===----------------------------------------------------------------------===//
+
+/// SizeAndOffsetDie - Compute the size and offset of a DIE.
+///
+unsigned DwarfDebug::SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
+ // Get the children.
+ const std::vector<DIE *> &Children = Die->getChildren();
+
+ // If not last sibling and has children then add sibling offset attribute.
+ if (!Last && !Children.empty()) Die->AddSiblingOffset();
+
+ // Record the abbreviation.
+ AssignAbbrevNumber(Die->getAbbrev());
+
+ // Get the abbreviation for this DIE.
+ unsigned AbbrevNumber = Die->getAbbrevNumber();
+ const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
+
+ // Set DIE offset
+ Die->setOffset(Offset);
+
+ // Start the size with the size of abbreviation code.
+ Offset += TargetAsmInfo::getULEB128Size(AbbrevNumber);
+
+ const SmallVector<DIEValue*, 32> &Values = Die->getValues();
+ const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
+
+ // Size the DIE attribute values.
+ for (unsigned i = 0, N = Values.size(); i < N; ++i)
+ // Size attribute value.
+ Offset += Values[i]->SizeOf(TD, AbbrevData[i].getForm());
+
+ // Size the DIE children if any.
+ if (!Children.empty()) {
+ assert(Abbrev->getChildrenFlag() == dwarf::DW_CHILDREN_yes &&
+ "Children flag not set");
+
+ for (unsigned j = 0, M = Children.size(); j < M; ++j)
+ Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
+
+ // End of children marker.
+ Offset += sizeof(int8_t);
+ }
+
+ Die->setSize(Offset - Die->getOffset());
+ return Offset;
+}
+
+/// SizeAndOffsets - Compute the size and offset of all the DIEs.
+///
+void DwarfDebug::SizeAndOffsets() {
+ // Compute size of compile unit header.
+ static unsigned Offset =
+ sizeof(int32_t) + // Length of Compilation Unit Info
+ sizeof(int16_t) + // DWARF version number
+ sizeof(int32_t) + // Offset Into Abbrev. Section
+ sizeof(int8_t); // Pointer Size (in bytes)
+
+ // Process base compile unit.
+ if (MainCU) {
+ SizeAndOffsetDie(MainCU->getDie(), Offset, true);
+ CompileUnitOffsets[MainCU] = 0;
+ return;
+ }
+
+ // Process all compile units.
+ unsigned PrevOffset = 0;
+
+ for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
+ CompileUnit *Unit = CompileUnits[i];
+ CompileUnitOffsets[Unit] = PrevOffset;
+ PrevOffset += SizeAndOffsetDie(Unit->getDie(), Offset, true)
+ + sizeof(int32_t); // FIXME - extra pad for gdb bug.
+ }
+}
+
+/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
+/// tools to recognize the object file contains Dwarf information.
+void DwarfDebug::EmitInitial() {
+ // Check to see if we already emitted intial headers.
+ if (didInitial) return;
+ didInitial = true;
+
+ // Dwarf sections base addresses.
+ if (TAI->doesDwarfRequireFrameSection()) {
+ Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
+ EmitLabel("section_debug_frame", 0);
+ }
+
+ Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
+ EmitLabel("section_info", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
+ EmitLabel("section_abbrev", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
+ EmitLabel("section_aranges", 0);
+
+ if (TAI->doesSupportMacInfoSection()) {
+ Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
+ EmitLabel("section_macinfo", 0);
+ }
+
+ Asm->SwitchToDataSection(TAI->getDwarfLineSection());
+ EmitLabel("section_line", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfLocSection());
+ EmitLabel("section_loc", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
+ EmitLabel("section_pubnames", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfStrSection());
+ EmitLabel("section_str", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
+ EmitLabel("section_ranges", 0);
+
+ Asm->SwitchToSection(TAI->getTextSection());
+ EmitLabel("text_begin", 0);
+ Asm->SwitchToSection(TAI->getDataSection());
+ EmitLabel("data_begin", 0);
+}
+
+/// EmitDIE - Recusively Emits a debug information entry.
+///
+void DwarfDebug::EmitDIE(DIE *Die) {
+ // Get the abbreviation for this DIE.
+ unsigned AbbrevNumber = Die->getAbbrevNumber();
+ const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
+
+ Asm->EOL();
+
+ // Emit the code (index) for the abbreviation.
+ Asm->EmitULEB128Bytes(AbbrevNumber);
+
+ if (Asm->isVerbose())
+ Asm->EOL(std::string("Abbrev [" +
+ utostr(AbbrevNumber) +
+ "] 0x" + utohexstr(Die->getOffset()) +
+ ":0x" + utohexstr(Die->getSize()) + " " +
+ dwarf::TagString(Abbrev->getTag())));
+ else
+ Asm->EOL();
+
+ SmallVector<DIEValue*, 32> &Values = Die->getValues();
+ const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
+
+ // Emit the DIE attribute values.
+ for (unsigned i = 0, N = Values.size(); i < N; ++i) {
+ unsigned Attr = AbbrevData[i].getAttribute();
+ unsigned Form = AbbrevData[i].getForm();
+ assert(Form && "Too many attributes for DIE (check abbreviation)");
+
+ switch (Attr) {
+ case dwarf::DW_AT_sibling:
+ Asm->EmitInt32(Die->SiblingOffset());
+ break;
+ case dwarf::DW_AT_abstract_origin: {
+ DIEEntry *E = cast<DIEEntry>(Values[i]);
+ DIE *Origin = E->getEntry();
+ unsigned Addr =
+ CompileUnitOffsets[Die->getAbstractCompileUnit()] +
+ Origin->getOffset();
+
+ Asm->EmitInt32(Addr);
+ break;
+ }
+ default:
+ // Emit an attribute using the defined form.
+ Values[i]->EmitValue(this, Form);
+ break;
+ }
+
+ Asm->EOL(dwarf::AttributeString(Attr));
+ }
+
+ // Emit the DIE children if any.
+ if (Abbrev->getChildrenFlag() == dwarf::DW_CHILDREN_yes) {
+ const std::vector<DIE *> &Children = Die->getChildren();
+
+ for (unsigned j = 0, M = Children.size(); j < M; ++j)
+ EmitDIE(Children[j]);
+
+ Asm->EmitInt8(0); Asm->EOL("End Of Children Mark");
+ }
+}
+
+/// EmitDebugInfo / EmitDebugInfoPerCU - Emit the debug info section.
+///
+void DwarfDebug::EmitDebugInfoPerCU(CompileUnit *Unit) {
+ DIE *Die = Unit->getDie();
+
+ // Emit the compile units header.
+ EmitLabel("info_begin", Unit->getID());
+
+ // Emit size of content not including length itself
+ unsigned ContentSize = Die->getSize() +
+ sizeof(int16_t) + // DWARF version number
+ sizeof(int32_t) + // Offset Into Abbrev. Section
+ sizeof(int8_t) + // Pointer Size (in bytes)
+ sizeof(int32_t); // FIXME - extra pad for gdb bug.
+
+ Asm->EmitInt32(ContentSize); Asm->EOL("Length of Compilation Unit Info");
+ Asm->EmitInt16(dwarf::DWARF_VERSION); Asm->EOL("DWARF version number");
+ EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
+ Asm->EOL("Offset Into Abbrev. Section");
+ Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
+
+ EmitDIE(Die);
+ // FIXME - extra padding for gdb bug.
+ Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
+ Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
+ Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
+ Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
+ EmitLabel("info_end", Unit->getID());
+
+ Asm->EOL();
+}
+
+void DwarfDebug::EmitDebugInfo() {
+ // Start debug info section.
+ Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
+
+ if (MainCU) {
+ EmitDebugInfoPerCU(MainCU);
+ return;
+ }
+
+ for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
+ EmitDebugInfoPerCU(CompileUnits[i]);
+}
+
+/// EmitAbbreviations - Emit the abbreviation section.
+///
+void DwarfDebug::EmitAbbreviations() const {
+ // Check to see if it is worth the effort.
+ if (!Abbreviations.empty()) {
+ // Start the debug abbrev section.
+ Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
+
+ EmitLabel("abbrev_begin", 0);
+
+ // For each abbrevation.
+ for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
+ // Get abbreviation data
+ const DIEAbbrev *Abbrev = Abbreviations[i];
+
+ // Emit the abbrevations code (base 1 index.)
+ Asm->EmitULEB128Bytes(Abbrev->getNumber());
+ Asm->EOL("Abbreviation Code");
+
+ // Emit the abbreviations data.
+ Abbrev->Emit(Asm);
+
+ Asm->EOL();
+ }
+
+ // Mark end of abbreviations.
+ Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)");
+
+ EmitLabel("abbrev_end", 0);
+ Asm->EOL();
+ }
+}
+
+/// EmitEndOfLineMatrix - Emit the last address of the section and the end of
+/// the line matrix.
+///
+void DwarfDebug::EmitEndOfLineMatrix(unsigned SectionEnd) {
+ // Define last address of section.
+ Asm->EmitInt8(0); Asm->EOL("Extended Op");
+ Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
+ Asm->EmitInt8(dwarf::DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
+ EmitReference("section_end", SectionEnd); Asm->EOL("Section end label");
+
+ // Mark end of matrix.
+ Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence");
+ Asm->EmitULEB128Bytes(1); Asm->EOL();
+ Asm->EmitInt8(1); Asm->EOL();
+}
+
+/// EmitDebugLines - Emit source line information.
+///
+void DwarfDebug::EmitDebugLines() {
+ // If the target is using .loc/.file, the assembler will be emitting the
+ // .debug_line table automatically.
+ if (TAI->hasDotLocAndDotFile())
+ return;
+
+ // Minimum line delta, thus ranging from -10..(255-10).
+ const int MinLineDelta = -(dwarf::DW_LNS_fixed_advance_pc + 1);
+ // Maximum line delta, thus ranging from -10..(255-10).
+ const int MaxLineDelta = 255 + MinLineDelta;
+
+ // Start the dwarf line section.
+ Asm->SwitchToDataSection(TAI->getDwarfLineSection());
+
+ // Construct the section header.
+ EmitDifference("line_end", 0, "line_begin", 0, true);
+ Asm->EOL("Length of Source Line Info");
+ EmitLabel("line_begin", 0);
+
+ Asm->EmitInt16(dwarf::DWARF_VERSION); Asm->EOL("DWARF version number");
+
+ EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true);
+ Asm->EOL("Prolog Length");
+ EmitLabel("line_prolog_begin", 0);
+
+ Asm->EmitInt8(1); Asm->EOL("Minimum Instruction Length");
+
+ Asm->EmitInt8(1); Asm->EOL("Default is_stmt_start flag");
+
+ Asm->EmitInt8(MinLineDelta); Asm->EOL("Line Base Value (Special Opcodes)");
+
+ Asm->EmitInt8(MaxLineDelta); Asm->EOL("Line Range Value (Special Opcodes)");
+
+ Asm->EmitInt8(-MinLineDelta); Asm->EOL("Special Opcode Base");
+
+ // Line number standard opcode encodings argument count
+ Asm->EmitInt8(0); Asm->EOL("DW_LNS_copy arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_pc arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_line arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_file arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_column arg count");
+ Asm->EmitInt8(0); Asm->EOL("DW_LNS_negate_stmt arg count");
+ Asm->EmitInt8(0); Asm->EOL("DW_LNS_set_basic_block arg count");
+ Asm->EmitInt8(0); Asm->EOL("DW_LNS_const_add_pc arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_fixed_advance_pc arg count");
+
+ // Emit directories.
+ for (unsigned DI = 1, DE = getNumSourceDirectories()+1; DI != DE; ++DI) {
+ Asm->EmitString(getSourceDirectoryName(DI));
+ Asm->EOL("Directory");
+ }
+
+ Asm->EmitInt8(0); Asm->EOL("End of directories");
+
+ // Emit files.
+ for (unsigned SI = 1, SE = getNumSourceIds()+1; SI != SE; ++SI) {
+ // Remember source id starts at 1.
+ std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(SI);
+ Asm->EmitString(getSourceFileName(Id.second));
+ Asm->EOL("Source");
+ Asm->EmitULEB128Bytes(Id.first);
+ Asm->EOL("Directory #");
+ Asm->EmitULEB128Bytes(0);
+ Asm->EOL("Mod date");
+ Asm->EmitULEB128Bytes(0);
+ Asm->EOL("File size");
+ }
+
+ Asm->EmitInt8(0); Asm->EOL("End of files");
+
+ EmitLabel("line_prolog_end", 0);
+
+ // A sequence for each text section.
+ unsigned SecSrcLinesSize = SectionSourceLines.size();
+
+ for (unsigned j = 0; j < SecSrcLinesSize; ++j) {
+ // Isolate current sections line info.
+ const std::vector<SrcLineInfo> &LineInfos = SectionSourceLines[j];
+
+ if (Asm->isVerbose()) {
+ const Section* S = SectionMap[j + 1];
+ O << '\t' << TAI->getCommentString() << " Section"
+ << S->getName() << '\n';
+ } else {
+ Asm->EOL();
+ }
+
+ // Dwarf assumes we start with first line of first source file.
+ unsigned Source = 1;
+ unsigned Line = 1;
+
+ // Construct rows of the address, source, line, column matrix.
+ for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
+ const SrcLineInfo &LineInfo = LineInfos[i];
+ unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
+ if (!LabelID) continue;
+
+ if (!Asm->isVerbose())
+ Asm->EOL();
+ else {
+ std::pair<unsigned, unsigned> SourceID =
+ getSourceDirectoryAndFileIds(LineInfo.getSourceID());
+ O << '\t' << TAI->getCommentString() << ' '
+ << getSourceDirectoryName(SourceID.first) << ' '
+ << getSourceFileName(SourceID.second)
+ <<" :" << utostr_32(LineInfo.getLine()) << '\n';
+ }
+
+ // Define the line address.
+ Asm->EmitInt8(0); Asm->EOL("Extended Op");
+ Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
+ Asm->EmitInt8(dwarf::DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
+ EmitReference("label", LabelID); Asm->EOL("Location label");
+
+ // If change of source, then switch to the new source.
+ if (Source != LineInfo.getSourceID()) {
+ Source = LineInfo.getSourceID();
+ Asm->EmitInt8(dwarf::DW_LNS_set_file); Asm->EOL("DW_LNS_set_file");
+ Asm->EmitULEB128Bytes(Source); Asm->EOL("New Source");
+ }
+
+ // If change of line.
+ if (Line != LineInfo.getLine()) {
+ // Determine offset.
+ int Offset = LineInfo.getLine() - Line;
+ int Delta = Offset - MinLineDelta;
+
+ // Update line.
+ Line = LineInfo.getLine();
+
+ // If delta is small enough and in range...
+ if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
+ // ... then use fast opcode.
+ Asm->EmitInt8(Delta - MinLineDelta); Asm->EOL("Line Delta");
+ } else {
+ // ... otherwise use long hand.
+ Asm->EmitInt8(dwarf::DW_LNS_advance_line);
+ Asm->EOL("DW_LNS_advance_line");
+ Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
+ Asm->EmitInt8(dwarf::DW_LNS_copy); Asm->EOL("DW_LNS_copy");
+ }
+ } else {
+ // Copy the previous row (different address or source)
+ Asm->EmitInt8(dwarf::DW_LNS_copy); Asm->EOL("DW_LNS_copy");
+ }
+ }
+
+ EmitEndOfLineMatrix(j + 1);
+ }
+
+ if (SecSrcLinesSize == 0)
+ // Because we're emitting a debug_line section, we still need a line
+ // table. The linker and friends expect it to exist. If there's nothing to
+ // put into it, emit an empty table.
+ EmitEndOfLineMatrix(1);
+
+ EmitLabel("line_end", 0);
+ Asm->EOL();
+}
+
+/// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
+///
+void DwarfDebug::EmitCommonDebugFrame() {
+ if (!TAI->doesDwarfRequireFrameSection())
+ return;
+
+ int stackGrowth =
+ Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
+ TargetFrameInfo::StackGrowsUp ?
+ TD->getPointerSize() : -TD->getPointerSize();
+
+ // Start the dwarf frame section.
+ Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
+
+ EmitLabel("debug_frame_common", 0);
+ EmitDifference("debug_frame_common_end", 0,
+ "debug_frame_common_begin", 0, true);
+ Asm->EOL("Length of Common Information Entry");
+
+ EmitLabel("debug_frame_common_begin", 0);
+ Asm->EmitInt32((int)dwarf::DW_CIE_ID);
+ Asm->EOL("CIE Identifier Tag");
+ Asm->EmitInt8(dwarf::DW_CIE_VERSION);
+ Asm->EOL("CIE Version");
+ Asm->EmitString("");
+ Asm->EOL("CIE Augmentation");
+ Asm->EmitULEB128Bytes(1);
+ Asm->EOL("CIE Code Alignment Factor");
+ Asm->EmitSLEB128Bytes(stackGrowth);
+ Asm->EOL("CIE Data Alignment Factor");
+ Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
+ Asm->EOL("CIE RA Column");
+
+ std::vector<MachineMove> Moves;
+ RI->getInitialFrameState(Moves);
+
+ EmitFrameMoves(NULL, 0, Moves, false);
+
+ Asm->EmitAlignment(2, 0, 0, false);
+ EmitLabel("debug_frame_common_end", 0);
+
+ Asm->EOL();
+}
+
+/// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
+/// section.
+void
+DwarfDebug::EmitFunctionDebugFrame(const FunctionDebugFrameInfo&DebugFrameInfo){
+ if (!TAI->doesDwarfRequireFrameSection())
+ return;
+
+ // Start the dwarf frame section.
+ Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
+
+ EmitDifference("debug_frame_end", DebugFrameInfo.Number,
+ "debug_frame_begin", DebugFrameInfo.Number, true);
+ Asm->EOL("Length of Frame Information Entry");
+
+ EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
+
+ EmitSectionOffset("debug_frame_common", "section_debug_frame",
+ 0, 0, true, false);
+ Asm->EOL("FDE CIE offset");
+
+ EmitReference("func_begin", DebugFrameInfo.Number);
+ Asm->EOL("FDE initial location");
+ EmitDifference("func_end", DebugFrameInfo.Number,
+ "func_begin", DebugFrameInfo.Number);
+ Asm->EOL("FDE address range");
+
+ EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves,
+ false);
+
+ Asm->EmitAlignment(2, 0, 0, false);
+ EmitLabel("debug_frame_end", DebugFrameInfo.Number);
+
+ Asm->EOL();
+}
+
+void DwarfDebug::EmitDebugPubNamesPerCU(CompileUnit *Unit) {
+ EmitDifference("pubnames_end", Unit->getID(),
+ "pubnames_begin", Unit->getID(), true);
+ Asm->EOL("Length of Public Names Info");
+
+ EmitLabel("pubnames_begin", Unit->getID());
+
+ Asm->EmitInt16(dwarf::DWARF_VERSION); Asm->EOL("DWARF Version");
+
+ EmitSectionOffset("info_begin", "section_info",
+ Unit->getID(), 0, true, false);
+ Asm->EOL("Offset of Compilation Unit Info");
+
+ EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),
+ true);
+ Asm->EOL("Compilation Unit Length");
+
+ StringMap<DIE*> &Globals = Unit->getGlobals();
+ for (StringMap<DIE*>::const_iterator
+ GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
+ const char *Name = GI->getKeyData();
+ DIE * Entity = GI->second;
+
+ Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
+ Asm->EmitString(Name, strlen(Name)); Asm->EOL("External Name");
+ }
+
+ Asm->EmitInt32(0); Asm->EOL("End Mark");
+ EmitLabel("pubnames_end", Unit->getID());
+
+ Asm->EOL();
+}
+
+/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
+///
+void DwarfDebug::EmitDebugPubNames() {
+ // Start the dwarf pubnames section.
+ Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
+
+ if (MainCU) {
+ EmitDebugPubNamesPerCU(MainCU);
+ return;
+ }
+
+ for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
+ EmitDebugPubNamesPerCU(CompileUnits[i]);
+}
+
+/// EmitDebugStr - Emit visible names into a debug str section.
+///
+void DwarfDebug::EmitDebugStr() {
+ // Check to see if it is worth the effort.
+ if (!StringPool.empty()) {
+ // Start the dwarf str section.
+ Asm->SwitchToDataSection(TAI->getDwarfStrSection());
+
+ // For each of strings in the string pool.
+ for (unsigned StringID = 1, N = StringPool.size();
+ StringID <= N; ++StringID) {
+ // Emit a label for reference from debug information entries.
+ EmitLabel("string", StringID);
+
+ // Emit the string itself.
+ const std::string &String = StringPool[StringID];
+ Asm->EmitString(String); Asm->EOL();
+ }
+
+ Asm->EOL();
+ }
+}
+
+/// EmitDebugLoc - Emit visible names into a debug loc section.
+///
+void DwarfDebug::EmitDebugLoc() {
+ // Start the dwarf loc section.
+ Asm->SwitchToDataSection(TAI->getDwarfLocSection());
+ Asm->EOL();
+}
+
+/// EmitDebugARanges - Emit visible names into a debug aranges section.
+///
+void DwarfDebug::EmitDebugARanges() {
+ // Start the dwarf aranges section.
+ Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
+
+ // FIXME - Mock up
+#if 0
+ CompileUnit *Unit = GetBaseCompileUnit();
+
+ // Don't include size of length
+ Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info");
+
+ Asm->EmitInt16(dwarf::DWARF_VERSION); Asm->EOL("Dwarf Version");
+
+ EmitReference("info_begin", Unit->getID());
+ Asm->EOL("Offset of Compilation Unit Info");
+
+ Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Size of Address");
+
+ Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
+
+ Asm->EmitInt16(0); Asm->EOL("Pad (1)");
+ Asm->EmitInt16(0); Asm->EOL("Pad (2)");
+
+ // Range 1
+ EmitReference("text_begin", 0); Asm->EOL("Address");
+ EmitDifference("text_end", 0, "text_begin", 0, true); Asm->EOL("Length");
+
+ Asm->EmitInt32(0); Asm->EOL("EOM (1)");
+ Asm->EmitInt32(0); Asm->EOL("EOM (2)");
+#endif
+
+ Asm->EOL();
+}
+
+/// EmitDebugRanges - Emit visible names into a debug ranges section.
+///
+void DwarfDebug::EmitDebugRanges() {
+ // Start the dwarf ranges section.
+ Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
+ Asm->EOL();
+}
+
+/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
+///
+void DwarfDebug::EmitDebugMacInfo() {
+ if (TAI->doesSupportMacInfoSection()) {
+ // Start the dwarf macinfo section.
+ Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
+ Asm->EOL();
+ }
+}
+
+/// EmitDebugInlineInfo - Emit inline info using following format.
+/// Section Header:
+/// 1. length of section
+/// 2. Dwarf version number
+/// 3. address size.
+///
+/// Entries (one "entry" for each function that was inlined):
+///
+/// 1. offset into __debug_str section for MIPS linkage name, if exists;
+/// otherwise offset into __debug_str for regular function name.
+/// 2. offset into __debug_str section for regular function name.
+/// 3. an unsigned LEB128 number indicating the number of distinct inlining
+/// instances for the function.
+///
+/// The rest of the entry consists of a {die_offset, low_pc} pair for each
+/// inlined instance; the die_offset points to the inlined_subroutine die in the
+/// __debug_info section, and the low_pc is the starting address for the
+/// inlining instance.
+void DwarfDebug::EmitDebugInlineInfo() {
+ if (!TAI->doesDwarfUsesInlineInfoSection())
+ return;
+
+ if (!MainCU)
+ return;
+
+ Asm->SwitchToDataSection(TAI->getDwarfDebugInlineSection());
+ Asm->EOL();
+ EmitDifference("debug_inlined_end", 1,
+ "debug_inlined_begin", 1, true);
+ Asm->EOL("Length of Debug Inlined Information Entry");
+
+ EmitLabel("debug_inlined_begin", 1);
+
+ Asm->EmitInt16(dwarf::DWARF_VERSION); Asm->EOL("Dwarf Version");
+ Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
+
+ for (DenseMap<GlobalVariable *, SmallVector<unsigned, 4> >::iterator
+ I = InlineInfo.begin(), E = InlineInfo.end(); I != E; ++I) {
+ GlobalVariable *GV = I->first;
+ SmallVector<unsigned, 4> &Labels = I->second;
+ DISubprogram SP(GV);
+ std::string Name;
+ std::string LName;
+
+ SP.getLinkageName(LName);
+ SP.getName(Name);
+
+ Asm->EmitString(LName.empty() ? Name : LName);
+ Asm->EOL("MIPS linkage name");
+
+ Asm->EmitString(Name); Asm->EOL("Function name");
+
+ Asm->EmitULEB128Bytes(Labels.size()); Asm->EOL("Inline count");
+
+ for (SmallVector<unsigned, 4>::iterator LI = Labels.begin(),
+ LE = Labels.end(); LI != LE; ++LI) {
+ DIE *SP = MainCU->getDieMapSlotFor(GV);
+ Asm->EmitInt32(SP->getOffset()); Asm->EOL("DIE offset");
+
+ if (TD->getPointerSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName("label", *LI); Asm->EOL("low_pc");
+ }
+ }
+
+ EmitLabel("debug_inlined_end", 1);
+ Asm->EOL();
+}
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
new file mode 100644
index 0000000..9824566
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -0,0 +1,561 @@
+//===-- llvm/CodeGen/DwarfDebug.h - Dwarf Debug Framework ------*- C++ -*--===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing dwarf debug info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_ASMPRINTER_DWARFDEBUG_H__
+#define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
+
+#include "DIE.h"
+#include "DwarfPrinter.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/SmallSet.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/UniqueVector.h"
+#include <string>
+
+namespace llvm {
+
+class CompileUnit;
+class DbgVariable;
+class DbgScope;
+class DbgConcreteScope;
+class MachineFrameInfo;
+class MachineModuleInfo;
+class TargetAsmInfo;
+class Timer;
+
+//===----------------------------------------------------------------------===//
+/// SrcLineInfo - This class is used to record source line correspondence.
+///
+class VISIBILITY_HIDDEN SrcLineInfo {
+ unsigned Line; // Source line number.
+ unsigned Column; // Source column.
+ unsigned SourceID; // Source ID number.
+ unsigned LabelID; // Label in code ID number.
+public:
+ SrcLineInfo(unsigned L, unsigned C, unsigned S, unsigned I)
+ : Line(L), Column(C), SourceID(S), LabelID(I) {}
+
+ // Accessors
+ unsigned getLine() const { return Line; }
+ unsigned getColumn() const { return Column; }
+ unsigned getSourceID() const { return SourceID; }
+ unsigned getLabelID() const { return LabelID; }
+};
+
+class VISIBILITY_HIDDEN DwarfDebug : public Dwarf {
+ //===--------------------------------------------------------------------===//
+ // Attributes used to construct specific Dwarf sections.
+ //
+
+ /// CompileUnitMap - A map of global variables representing compile units to
+ /// compile units.
+ DenseMap<Value *, CompileUnit *> CompileUnitMap;
+
+ /// CompileUnits - All the compile units in this module.
+ ///
+ SmallVector<CompileUnit *, 8> CompileUnits;
+
+ /// MainCU - Some platform prefers one compile unit per .o file. In such
+ /// cases, all dies are inserted in MainCU.
+ CompileUnit *MainCU;
+
+ /// AbbreviationsSet - Used to uniquely define abbreviations.
+ ///
+ FoldingSet<DIEAbbrev> AbbreviationsSet;
+
+ /// Abbreviations - A list of all the unique abbreviations in use.
+ ///
+ std::vector<DIEAbbrev *> Abbreviations;
+
+ /// DirectoryIdMap - Directory name to directory id map.
+ ///
+ StringMap<unsigned> DirectoryIdMap;
+
+ /// DirectoryNames - A list of directory names.
+ SmallVector<std::string, 8> DirectoryNames;
+
+ /// SourceFileIdMap - Source file name to source file id map.
+ ///
+ StringMap<unsigned> SourceFileIdMap;
+
+ /// SourceFileNames - A list of source file names.
+ SmallVector<std::string, 8> SourceFileNames;
+
+ /// SourceIdMap - Source id map, i.e. pair of directory id and source file
+ /// id mapped to a unique id.
+ DenseMap<std::pair<unsigned, unsigned>, unsigned> SourceIdMap;
+
+ /// SourceIds - Reverse map from source id to directory id + file id pair.
+ ///
+ SmallVector<std::pair<unsigned, unsigned>, 8> SourceIds;
+
+ /// Lines - List of of source line correspondence.
+ std::vector<SrcLineInfo> Lines;
+
+ /// ValuesSet - Used to uniquely define values.
+ ///
+ FoldingSet<DIEValue> ValuesSet;
+
+ /// Values - A list of all the unique values in use.
+ ///
+ std::vector<DIEValue *> Values;
+
+ /// StringPool - A UniqueVector of strings used by indirect references.
+ ///
+ UniqueVector<std::string> StringPool;
+
+ /// SectionMap - Provides a unique id per text section.
+ ///
+ UniqueVector<const Section*> SectionMap;
+
+ /// SectionSourceLines - Tracks line numbers per text section.
+ ///
+ std::vector<std::vector<SrcLineInfo> > SectionSourceLines;
+
+ /// didInitial - Flag to indicate if initial emission has been done.
+ ///
+ bool didInitial;
+
+ /// shouldEmit - Flag to indicate if debug information should be emitted.
+ ///
+ bool shouldEmit;
+
+ // FunctionDbgScope - Top level scope for the current function.
+ //
+ DbgScope *FunctionDbgScope;
+
+ /// DbgScopeMap - Tracks the scopes in the current function.
+ DenseMap<GlobalVariable *, DbgScope *> DbgScopeMap;
+
+ /// DbgAbstractScopeMap - Tracks abstract instance scopes in the current
+ /// function.
+ DenseMap<GlobalVariable *, DbgScope *> DbgAbstractScopeMap;
+
+ /// DbgConcreteScopeMap - Tracks concrete instance scopes in the current
+ /// function.
+ DenseMap<GlobalVariable *,
+ SmallVector<DbgScope *, 8> > DbgConcreteScopeMap;
+
+ /// InlineInfo - Keep track of inlined functions and their location. This
+ /// information is used to populate debug_inlined section.
+ DenseMap<GlobalVariable *, SmallVector<unsigned, 4> > InlineInfo;
+
+ /// InlinedVariableScopes - Scopes information for the inlined subroutine
+ /// variables.
+ DenseMap<const MachineInstr *, DbgScope *> InlinedVariableScopes;
+
+ /// AbstractInstanceRootMap - Map of abstract instance roots of inlined
+ /// functions. These are subroutine entries that contain a DW_AT_inline
+ /// attribute.
+ DenseMap<const GlobalVariable *, DbgScope *> AbstractInstanceRootMap;
+
+ /// InlinedParamMap - A map keeping track of which parameters are assigned to
+ /// which abstract instance.
+ DenseMap<const GlobalVariable *,
+ SmallSet<const GlobalVariable *, 32> > InlinedParamMap;
+
+ /// AbstractInstanceRootList - List of abstract instance roots of inlined
+ /// functions. These are subroutine entries that contain a DW_AT_inline
+ /// attribute.
+ SmallVector<DbgScope *, 32> AbstractInstanceRootList;
+
+ /// LexicalScopeStack - A stack of lexical scopes. The top one is the current
+ /// scope.
+ SmallVector<DbgScope *, 16> LexicalScopeStack;
+
+ /// CompileUnitOffsets - A vector of the offsets of the compile units. This is
+ /// used when calculating the "origin" of a concrete instance of an inlined
+ /// function.
+ DenseMap<CompileUnit *, unsigned> CompileUnitOffsets;
+
+ /// DebugTimer - Timer for the Dwarf debug writer.
+ Timer *DebugTimer;
+
+ struct FunctionDebugFrameInfo {
+ unsigned Number;
+ std::vector<MachineMove> Moves;
+
+ FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M)
+ : Number(Num), Moves(M) {}
+ };
+
+ std::vector<FunctionDebugFrameInfo> DebugFrames;
+
+ /// getSourceDirectoryAndFileIds - Return the directory and file ids that
+ /// maps to the source id. Source id starts at 1.
+ std::pair<unsigned, unsigned>
+ getSourceDirectoryAndFileIds(unsigned SId) const {
+ return SourceIds[SId-1];
+ }
+
+ /// getNumSourceDirectories - Return the number of source directories in the
+ /// debug info.
+ unsigned getNumSourceDirectories() const {
+ return DirectoryNames.size();
+ }
+
+ /// getSourceDirectoryName - Return the name of the directory corresponding
+ /// to the id.
+ const std::string &getSourceDirectoryName(unsigned Id) const {
+ return DirectoryNames[Id - 1];
+ }
+
+ /// getSourceFileName - Return the name of the source file corresponding
+ /// to the id.
+ const std::string &getSourceFileName(unsigned Id) const {
+ return SourceFileNames[Id - 1];
+ }
+
+ /// getNumSourceIds - Return the number of unique source ids.
+ unsigned getNumSourceIds() const {
+ return SourceIds.size();
+ }
+
+ /// AssignAbbrevNumber - Define a unique number for the abbreviation.
+ ///
+ void AssignAbbrevNumber(DIEAbbrev &Abbrev);
+
+ /// CreateDIEEntry - Creates a new DIEEntry to be a proxy for a debug
+ /// information entry.
+ DIEEntry *CreateDIEEntry(DIE *Entry = NULL);
+
+ /// SetDIEEntry - Set a DIEEntry once the debug information entry is defined.
+ ///
+ void SetDIEEntry(DIEEntry *Value, DIE *Entry);
+
+ /// AddUInt - Add an unsigned integer attribute data and value.
+ ///
+ void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer);
+
+ /// AddSInt - Add an signed integer attribute data and value.
+ ///
+ void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer);
+
+ /// AddString - Add a string attribute data and value.
+ ///
+ void AddString(DIE *Die, unsigned Attribute, unsigned Form,
+ const std::string &String);
+
+ /// AddLabel - Add a Dwarf label attribute data and value.
+ ///
+ void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Label);
+
+ /// AddObjectLabel - Add an non-Dwarf label attribute data and value.
+ ///
+ void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
+ const std::string &Label);
+
+ /// AddSectionOffset - Add a section offset label attribute data and value.
+ ///
+ void AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Label, const DWLabel &Section,
+ bool isEH = false, bool useSet = true);
+
+ /// AddDelta - Add a label delta attribute data and value.
+ ///
+ void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Hi, const DWLabel &Lo);
+
+ /// AddDIEEntry - Add a DIE attribute data and value.
+ ///
+ void AddDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
+ Die->AddValue(Attribute, Form, CreateDIEEntry(Entry));
+ }
+
+ /// AddBlock - Add block data.
+ ///
+ void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block);
+
+ /// AddSourceLine - Add location information to specified debug information
+ /// entry.
+ void AddSourceLine(DIE *Die, const DIVariable *V);
+
+ /// AddSourceLine - Add location information to specified debug information
+ /// entry.
+ void AddSourceLine(DIE *Die, const DIGlobal *G);
+
+ void AddSourceLine(DIE *Die, const DIType *Ty);
+
+ /// AddAddress - Add an address attribute to a die based on the location
+ /// provided.
+ void AddAddress(DIE *Die, unsigned Attribute,
+ const MachineLocation &Location);
+
+ /// AddType - Add a new type attribute to the specified entity.
+ void AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty);
+
+ /// ConstructTypeDIE - Construct basic type die from DIBasicType.
+ void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DIBasicType BTy);
+
+ /// ConstructTypeDIE - Construct derived type die from DIDerivedType.
+ void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DIDerivedType DTy);
+
+ /// ConstructTypeDIE - Construct type DIE from DICompositeType.
+ void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DICompositeType CTy);
+
+ /// ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
+ void ConstructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy);
+
+ /// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
+ void ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DICompositeType *CTy);
+
+ /// ConstructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
+ DIE *ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy);
+
+ /// CreateGlobalVariableDIE - Create new DIE using GV.
+ DIE *CreateGlobalVariableDIE(CompileUnit *DW_Unit,
+ const DIGlobalVariable &GV);
+
+ /// CreateMemberDIE - Create new member DIE.
+ DIE *CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT);
+
+ /// CreateSubprogramDIE - Create new DIE using SP.
+ DIE *CreateSubprogramDIE(CompileUnit *DW_Unit,
+ const DISubprogram &SP,
+ bool IsConstructor = false,
+ bool IsInlined = false);
+
+ /// FindCompileUnit - Get the compile unit for the given descriptor.
+ ///
+ CompileUnit &FindCompileUnit(DICompileUnit Unit) const;
+
+ /// CreateDbgScopeVariable - Create a new scope variable.
+ ///
+ DIE *CreateDbgScopeVariable(DbgVariable *DV, CompileUnit *Unit);
+
+ /// getOrCreateScope - Returns the scope associated with the given descriptor.
+ ///
+ DbgScope *getOrCreateScope(GlobalVariable *V);
+
+ /// ConstructDbgScope - Construct the components of a scope.
+ ///
+ void ConstructDbgScope(DbgScope *ParentScope,
+ unsigned ParentStartID, unsigned ParentEndID,
+ DIE *ParentDie, CompileUnit *Unit);
+
+ /// ConstructFunctionDbgScope - Construct the scope for the subprogram.
+ ///
+ void ConstructFunctionDbgScope(DbgScope *RootScope,
+ bool AbstractScope = false);
+
+ /// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
+ ///
+ void ConstructDefaultDbgScope(MachineFunction *MF);
+
+ /// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
+ /// tools to recognize the object file contains Dwarf information.
+ void EmitInitial();
+
+ /// EmitDIE - Recusively Emits a debug information entry.
+ ///
+ void EmitDIE(DIE *Die);
+
+ /// SizeAndOffsetDie - Compute the size and offset of a DIE.
+ ///
+ unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last);
+
+ /// SizeAndOffsets - Compute the size and offset of all the DIEs.
+ ///
+ void SizeAndOffsets();
+
+ /// EmitDebugInfo / EmitDebugInfoPerCU - Emit the debug info section.
+ ///
+ void EmitDebugInfoPerCU(CompileUnit *Unit);
+
+ void EmitDebugInfo();
+
+ /// EmitAbbreviations - Emit the abbreviation section.
+ ///
+ void EmitAbbreviations() const;
+
+ /// EmitEndOfLineMatrix - Emit the last address of the section and the end of
+ /// the line matrix.
+ ///
+ void EmitEndOfLineMatrix(unsigned SectionEnd);
+
+ /// EmitDebugLines - Emit source line information.
+ ///
+ void EmitDebugLines();
+
+ /// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
+ ///
+ void EmitCommonDebugFrame();
+
+ /// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
+ /// section.
+ void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo);
+
+ void EmitDebugPubNamesPerCU(CompileUnit *Unit);
+
+ /// EmitDebugPubNames - Emit visible names into a debug pubnames section.
+ ///
+ void EmitDebugPubNames();
+
+ /// EmitDebugStr - Emit visible names into a debug str section.
+ ///
+ void EmitDebugStr();
+
+ /// EmitDebugLoc - Emit visible names into a debug loc section.
+ ///
+ void EmitDebugLoc();
+
+ /// EmitDebugARanges - Emit visible names into a debug aranges section.
+ ///
+ void EmitDebugARanges();
+
+ /// EmitDebugRanges - Emit visible names into a debug ranges section.
+ ///
+ void EmitDebugRanges();
+
+ /// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
+ ///
+ void EmitDebugMacInfo();
+
+ /// EmitDebugInlineInfo - Emit inline info using following format.
+ /// Section Header:
+ /// 1. length of section
+ /// 2. Dwarf version number
+ /// 3. address size.
+ ///
+ /// Entries (one "entry" for each function that was inlined):
+ ///
+ /// 1. offset into __debug_str section for MIPS linkage name, if exists;
+ /// otherwise offset into __debug_str for regular function name.
+ /// 2. offset into __debug_str section for regular function name.
+ /// 3. an unsigned LEB128 number indicating the number of distinct inlining
+ /// instances for the function.
+ ///
+ /// The rest of the entry consists of a {die_offset, low_pc} pair for each
+ /// inlined instance; the die_offset points to the inlined_subroutine die in
+ /// the __debug_info section, and the low_pc is the starting address for the
+ /// inlining instance.
+ void EmitDebugInlineInfo();
+
+ /// GetOrCreateSourceID - Look up the source id with the given directory and
+ /// source file names. If none currently exists, create a new id and insert it
+ /// in the SourceIds map. This can update DirectoryNames and SourceFileNames maps
+ /// as well.
+ unsigned GetOrCreateSourceID(const std::string &DirName,
+ const std::string &FileName);
+
+ void ConstructCompileUnit(GlobalVariable *GV);
+
+ /// ConstructCompileUnits - Create a compile unit DIEs.
+ void ConstructCompileUnits();
+
+ bool ConstructGlobalVariableDIE(GlobalVariable *GV);
+
+ /// ConstructGlobalVariableDIEs - Create DIEs for each of the externally
+ /// visible global variables. Return true if at least one global DIE is
+ /// created.
+ bool ConstructGlobalVariableDIEs();
+
+ bool ConstructSubprogram(GlobalVariable *GV);
+
+ /// ConstructSubprograms - Create DIEs for each of the externally visible
+ /// subprograms. Return true if at least one subprogram DIE is created.
+ bool ConstructSubprograms();
+public:
+ //===--------------------------------------------------------------------===//
+ // Main entry points.
+ //
+ DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T);
+ virtual ~DwarfDebug();
+
+ /// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
+ /// be emitted.
+ bool ShouldEmitDwarfDebug() const { return shouldEmit; }
+
+ /// SetDebugInfo - Create global DIEs and emit initial debug info sections.
+ /// This is inovked by the target AsmPrinter.
+ void SetDebugInfo(MachineModuleInfo *mmi);
+
+ /// BeginModule - Emit all Dwarf sections that should come prior to the
+ /// content.
+ void BeginModule(Module *M) {
+ this->M = M;
+ }
+
+ /// EndModule - Emit all Dwarf sections that should come after the content.
+ ///
+ void EndModule();
+
+ /// BeginFunction - Gather pre-function debug information. Assumes being
+ /// emitted immediately after the function entry point.
+ void BeginFunction(MachineFunction *MF);
+
+ /// EndFunction - Gather and emit post-function debug information.
+ ///
+ void EndFunction(MachineFunction *MF);
+
+ /// RecordSourceLine - Records location information and associates it with a
+ /// label. Returns a unique label ID used to generate a label and provide
+ /// correspondence to the source line list.
+ unsigned RecordSourceLine(Value *V, unsigned Line, unsigned Col);
+
+ /// RecordSourceLine - Records location information and associates it with a
+ /// label. Returns a unique label ID used to generate a label and provide
+ /// correspondence to the source line list.
+ unsigned RecordSourceLine(unsigned Line, unsigned Col, DICompileUnit CU);
+
+ /// getRecordSourceLineCount - Return the number of source lines in the debug
+ /// info.
+ unsigned getRecordSourceLineCount() const {
+ return Lines.size();
+ }
+
+ /// getOrCreateSourceID - Public version of GetOrCreateSourceID. This can be
+ /// timed. Look up the source id with the given directory and source file
+ /// names. If none currently exists, create a new id and insert it in the
+ /// SourceIds map. This can update DirectoryNames and SourceFileNames maps as
+ /// well.
+ unsigned getOrCreateSourceID(const std::string &DirName,
+ const std::string &FileName);
+
+ /// RecordRegionStart - Indicate the start of a region.
+ unsigned RecordRegionStart(GlobalVariable *V);
+
+ /// RecordRegionEnd - Indicate the end of a region.
+ unsigned RecordRegionEnd(GlobalVariable *V);
+
+ /// RecordVariable - Indicate the declaration of a local variable.
+ void RecordVariable(GlobalVariable *GV, unsigned FrameIndex,
+ const MachineInstr *MI);
+
+ //// RecordInlinedFnStart - Indicate the start of inlined subroutine.
+ unsigned RecordInlinedFnStart(DISubprogram &SP, DICompileUnit CU,
+ unsigned Line, unsigned Col);
+
+ /// RecordInlinedFnEnd - Indicate the end of inlined subroutine.
+ unsigned RecordInlinedFnEnd(DISubprogram &SP);
+
+ /// RecordVariableScope - Record scope for the variable declared by
+ /// DeclareMI. DeclareMI must describe TargetInstrInfo::DECLARE. Record scopes
+ /// for only inlined subroutine variables. Other variables's scopes are
+ /// determined during RecordVariable().
+ void RecordVariableScope(DIVariable &DV, const MachineInstr *DeclareMI);
+};
+
+} // End of namespace llvm
+
+#endif
diff --git a/lib/CodeGen/AsmPrinter/DwarfException.cpp b/lib/CodeGen/AsmPrinter/DwarfException.cpp
new file mode 100644
index 0000000..37466ab
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DwarfException.cpp
@@ -0,0 +1,706 @@
+//===-- CodeGen/AsmPrinter/DwarfException.cpp - Dwarf Exception Impl ------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing dwarf exception info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DwarfException.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/Timer.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/ADT/StringExtras.h"
+using namespace llvm;
+
+static TimerGroup &getDwarfTimerGroup() {
+ static TimerGroup DwarfTimerGroup("Dwarf Exception");
+ return DwarfTimerGroup;
+}
+
+DwarfException::DwarfException(raw_ostream &OS, AsmPrinter *A,
+ const TargetAsmInfo *T)
+ : Dwarf(OS, A, T, "eh"), shouldEmitTable(false), shouldEmitMoves(false),
+ shouldEmitTableModule(false), shouldEmitMovesModule(false),
+ ExceptionTimer(0) {
+ if (TimePassesIsEnabled)
+ ExceptionTimer = new Timer("Dwarf Exception Writer",
+ getDwarfTimerGroup());
+}
+
+DwarfException::~DwarfException() {
+ delete ExceptionTimer;
+}
+
+void DwarfException::EmitCommonEHFrame(const Function *Personality,
+ unsigned Index) {
+ // Size and sign of stack growth.
+ int stackGrowth =
+ Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
+ TargetFrameInfo::StackGrowsUp ?
+ TD->getPointerSize() : -TD->getPointerSize();
+
+ // Begin eh frame section.
+ Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
+
+ if (!TAI->doesRequireNonLocalEHFrameLabel())
+ O << TAI->getEHGlobalPrefix();
+
+ O << "EH_frame" << Index << ":\n";
+ EmitLabel("section_eh_frame", Index);
+
+ // Define base labels.
+ EmitLabel("eh_frame_common", Index);
+
+ // Define the eh frame length.
+ EmitDifference("eh_frame_common_end", Index,
+ "eh_frame_common_begin", Index, true);
+ Asm->EOL("Length of Common Information Entry");
+
+ // EH frame header.
+ EmitLabel("eh_frame_common_begin", Index);
+ Asm->EmitInt32((int)0);
+ Asm->EOL("CIE Identifier Tag");
+ Asm->EmitInt8(dwarf::DW_CIE_VERSION);
+ Asm->EOL("CIE Version");
+
+ // The personality presence indicates that language specific information will
+ // show up in the eh frame.
+ Asm->EmitString(Personality ? "zPLR" : "zR");
+ Asm->EOL("CIE Augmentation");
+
+ // Round out reader.
+ Asm->EmitULEB128Bytes(1);
+ Asm->EOL("CIE Code Alignment Factor");
+ Asm->EmitSLEB128Bytes(stackGrowth);
+ Asm->EOL("CIE Data Alignment Factor");
+ Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
+ Asm->EOL("CIE Return Address Column");
+
+ // If there is a personality, we need to indicate the functions location.
+ if (Personality) {
+ Asm->EmitULEB128Bytes(7);
+ Asm->EOL("Augmentation Size");
+
+ if (TAI->getNeedsIndirectEncoding()) {
+ Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4 |
+ dwarf::DW_EH_PE_indirect);
+ Asm->EOL("Personality (pcrel sdata4 indirect)");
+ } else {
+ Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
+ Asm->EOL("Personality (pcrel sdata4)");
+ }
+
+ PrintRelDirective(true);
+ O << TAI->getPersonalityPrefix();
+ Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
+ O << TAI->getPersonalitySuffix();
+ if (strcmp(TAI->getPersonalitySuffix(), "+4@GOTPCREL"))
+ O << "-" << TAI->getPCSymbol();
+ Asm->EOL("Personality");
+
+ Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
+ Asm->EOL("LSDA Encoding (pcrel sdata4)");
+
+ Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
+ Asm->EOL("FDE Encoding (pcrel sdata4)");
+ } else {
+ Asm->EmitULEB128Bytes(1);
+ Asm->EOL("Augmentation Size");
+
+ Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
+ Asm->EOL("FDE Encoding (pcrel sdata4)");
+ }
+
+ // Indicate locations of general callee saved registers in frame.
+ std::vector<MachineMove> Moves;
+ RI->getInitialFrameState(Moves);
+ EmitFrameMoves(NULL, 0, Moves, true);
+
+ // On Darwin the linker honors the alignment of eh_frame, which means it must
+ // be 8-byte on 64-bit targets to match what gcc does. Otherwise you get
+ // holes which confuse readers of eh_frame.
+ Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
+ 0, 0, false);
+ EmitLabel("eh_frame_common_end", Index);
+
+ Asm->EOL();
+}
+
+/// EmitEHFrame - Emit function exception frame information.
+///
+void DwarfException::EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
+ assert(!EHFrameInfo.function->hasAvailableExternallyLinkage() &&
+ "Should not emit 'available externally' functions at all");
+
+ Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage();
+ Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
+
+ // Externally visible entry into the functions eh frame info. If the
+ // corresponding function is static, this should not be externally visible.
+ if (linkage != Function::InternalLinkage &&
+ linkage != Function::PrivateLinkage) {
+ if (const char *GlobalEHDirective = TAI->getGlobalEHDirective())
+ O << GlobalEHDirective << EHFrameInfo.FnName << "\n";
+ }
+
+ // If corresponding function is weak definition, this should be too.
+ if ((linkage == Function::WeakAnyLinkage ||
+ linkage == Function::WeakODRLinkage ||
+ linkage == Function::LinkOnceAnyLinkage ||
+ linkage == Function::LinkOnceODRLinkage) &&
+ TAI->getWeakDefDirective())
+ O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n";
+
+ // If there are no calls then you can't unwind. This may mean we can omit the
+ // EH Frame, but some environments do not handle weak absolute symbols. If
+ // UnwindTablesMandatory is set we cannot do this optimization; the unwind
+ // info is to be available for non-EH uses.
+ if (!EHFrameInfo.hasCalls &&
+ !UnwindTablesMandatory &&
+ ((linkage != Function::WeakAnyLinkage &&
+ linkage != Function::WeakODRLinkage &&
+ linkage != Function::LinkOnceAnyLinkage &&
+ linkage != Function::LinkOnceODRLinkage) ||
+ !TAI->getWeakDefDirective() ||
+ TAI->getSupportsWeakOmittedEHFrame())) {
+ O << EHFrameInfo.FnName << " = 0\n";
+ // This name has no connection to the function, so it might get
+ // dead-stripped when the function is not, erroneously. Prohibit
+ // dead-stripping unconditionally.
+ if (const char *UsedDirective = TAI->getUsedDirective())
+ O << UsedDirective << EHFrameInfo.FnName << "\n\n";
+ } else {
+ O << EHFrameInfo.FnName << ":\n";
+
+ // EH frame header.
+ EmitDifference("eh_frame_end", EHFrameInfo.Number,
+ "eh_frame_begin", EHFrameInfo.Number, true);
+ Asm->EOL("Length of Frame Information Entry");
+
+ EmitLabel("eh_frame_begin", EHFrameInfo.Number);
+
+ if (TAI->doesRequireNonLocalEHFrameLabel()) {
+ PrintRelDirective(true, true);
+ PrintLabelName("eh_frame_begin", EHFrameInfo.Number);
+
+ if (!TAI->isAbsoluteEHSectionOffsets())
+ O << "-EH_frame" << EHFrameInfo.PersonalityIndex;
+ } else {
+ EmitSectionOffset("eh_frame_begin", "eh_frame_common",
+ EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
+ true, true, false);
+ }
+
+ Asm->EOL("FDE CIE offset");
+
+ EmitReference("eh_func_begin", EHFrameInfo.Number, true, true);
+ Asm->EOL("FDE initial location");
+ EmitDifference("eh_func_end", EHFrameInfo.Number,
+ "eh_func_begin", EHFrameInfo.Number, true);
+ Asm->EOL("FDE address range");
+
+ // If there is a personality and landing pads then point to the language
+ // specific data area in the exception table.
+ if (EHFrameInfo.PersonalityIndex) {
+ Asm->EmitULEB128Bytes(4);
+ Asm->EOL("Augmentation size");
+
+ if (EHFrameInfo.hasLandingPads)
+ EmitReference("exception", EHFrameInfo.Number, true, true);
+ else
+ Asm->EmitInt32((int)0);
+ Asm->EOL("Language Specific Data Area");
+ } else {
+ Asm->EmitULEB128Bytes(0);
+ Asm->EOL("Augmentation size");
+ }
+
+ // Indicate locations of function specific callee saved registers in frame.
+ EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves,
+ true);
+
+ // On Darwin the linker honors the alignment of eh_frame, which means it
+ // must be 8-byte on 64-bit targets to match what gcc does. Otherwise you
+ // get holes which confuse readers of eh_frame.
+ Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
+ 0, 0, false);
+ EmitLabel("eh_frame_end", EHFrameInfo.Number);
+
+ // If the function is marked used, this table should be also. We cannot
+ // make the mark unconditional in this case, since retaining the table also
+ // retains the function in this case, and there is code around that depends
+ // on unused functions (calling undefined externals) being dead-stripped to
+ // link correctly. Yes, there really is.
+ if (MMI->getUsedFunctions().count(EHFrameInfo.function))
+ if (const char *UsedDirective = TAI->getUsedDirective())
+ O << UsedDirective << EHFrameInfo.FnName << "\n\n";
+ }
+}
+
+/// EmitExceptionTable - Emit landing pads and actions.
+///
+/// The general organization of the table is complex, but the basic concepts are
+/// easy. First there is a header which describes the location and organization
+/// of the three components that follow.
+///
+/// 1. The landing pad site information describes the range of code covered by
+/// the try. In our case it's an accumulation of the ranges covered by the
+/// invokes in the try. There is also a reference to the landing pad that
+/// handles the exception once processed. Finally an index into the actions
+/// table.
+/// 2. The action table, in our case, is composed of pairs of type ids and next
+/// action offset. Starting with the action index from the landing pad
+/// site, each type Id is checked for a match to the current exception. If
+/// it matches then the exception and type id are passed on to the landing
+/// pad. Otherwise the next action is looked up. This chain is terminated
+/// with a next action of zero. If no type id is found the the frame is
+/// unwound and handling continues.
+/// 3. Type id table contains references to all the C++ typeinfo for all
+/// catches in the function. This tables is reversed indexed base 1.
+
+/// SharedTypeIds - How many leading type ids two landing pads have in common.
+unsigned DwarfException::SharedTypeIds(const LandingPadInfo *L,
+ const LandingPadInfo *R) {
+ const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
+ unsigned LSize = LIds.size(), RSize = RIds.size();
+ unsigned MinSize = LSize < RSize ? LSize : RSize;
+ unsigned Count = 0;
+
+ for (; Count != MinSize; ++Count)
+ if (LIds[Count] != RIds[Count])
+ return Count;
+
+ return Count;
+}
+
+/// PadLT - Order landing pads lexicographically by type id.
+bool DwarfException::PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
+ const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
+ unsigned LSize = LIds.size(), RSize = RIds.size();
+ unsigned MinSize = LSize < RSize ? LSize : RSize;
+
+ for (unsigned i = 0; i != MinSize; ++i)
+ if (LIds[i] != RIds[i])
+ return LIds[i] < RIds[i];
+
+ return LSize < RSize;
+}
+
+void DwarfException::EmitExceptionTable() {
+ const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
+ const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
+ const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
+ if (PadInfos.empty()) return;
+
+ // Sort the landing pads in order of their type ids. This is used to fold
+ // duplicate actions.
+ SmallVector<const LandingPadInfo *, 64> LandingPads;
+ LandingPads.reserve(PadInfos.size());
+ for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
+ LandingPads.push_back(&PadInfos[i]);
+ std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
+
+ // Negative type ids index into FilterIds, positive type ids index into
+ // TypeInfos. The value written for a positive type id is just the type id
+ // itself. For a negative type id, however, the value written is the
+ // (negative) byte offset of the corresponding FilterIds entry. The byte
+ // offset is usually equal to the type id, because the FilterIds entries are
+ // written using a variable width encoding which outputs one byte per entry as
+ // long as the value written is not too large, but can differ. This kind of
+ // complication does not occur for positive type ids because type infos are
+ // output using a fixed width encoding. FilterOffsets[i] holds the byte
+ // offset corresponding to FilterIds[i].
+ SmallVector<int, 16> FilterOffsets;
+ FilterOffsets.reserve(FilterIds.size());
+ int Offset = -1;
+ for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
+ E = FilterIds.end(); I != E; ++I) {
+ FilterOffsets.push_back(Offset);
+ Offset -= TargetAsmInfo::getULEB128Size(*I);
+ }
+
+ // Compute the actions table and gather the first action index for each
+ // landing pad site.
+ SmallVector<ActionEntry, 32> Actions;
+ SmallVector<unsigned, 64> FirstActions;
+ FirstActions.reserve(LandingPads.size());
+
+ int FirstAction = 0;
+ unsigned SizeActions = 0;
+ for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
+ const LandingPadInfo *LP = LandingPads[i];
+ const std::vector<int> &TypeIds = LP->TypeIds;
+ const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
+ unsigned SizeSiteActions = 0;
+
+ if (NumShared < TypeIds.size()) {
+ unsigned SizeAction = 0;
+ ActionEntry *PrevAction = 0;
+
+ if (NumShared) {
+ const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
+ assert(Actions.size());
+ PrevAction = &Actions.back();
+ SizeAction = TargetAsmInfo::getSLEB128Size(PrevAction->NextAction) +
+ TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
+
+ for (unsigned j = NumShared; j != SizePrevIds; ++j) {
+ SizeAction -=
+ TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
+ SizeAction += -PrevAction->NextAction;
+ PrevAction = PrevAction->Previous;
+ }
+ }
+
+ // Compute the actions.
+ for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
+ int TypeID = TypeIds[I];
+ assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
+ int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
+ unsigned SizeTypeID = TargetAsmInfo::getSLEB128Size(ValueForTypeID);
+
+ int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
+ SizeAction = SizeTypeID + TargetAsmInfo::getSLEB128Size(NextAction);
+ SizeSiteActions += SizeAction;
+
+ ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
+ Actions.push_back(Action);
+
+ PrevAction = &Actions.back();
+ }
+
+ // Record the first action of the landing pad site.
+ FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
+ } // else identical - re-use previous FirstAction
+
+ FirstActions.push_back(FirstAction);
+
+ // Compute this sites contribution to size.
+ SizeActions += SizeSiteActions;
+ }
+
+ // Compute the call-site table. The entry for an invoke has a try-range
+ // containing the call, a non-zero landing pad and an appropriate action. The
+ // entry for an ordinary call has a try-range containing the call and zero for
+ // the landing pad and the action. Calls marked 'nounwind' have no entry and
+ // must not be contained in the try-range of any entry - they form gaps in the
+ // table. Entries must be ordered by try-range address.
+ SmallVector<CallSiteEntry, 64> CallSites;
+
+ RangeMapType PadMap;
+
+ // Invokes and nounwind calls have entries in PadMap (due to being bracketed
+ // by try-range labels when lowered). Ordinary calls do not, so appropriate
+ // try-ranges for them need be deduced.
+ for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
+ const LandingPadInfo *LandingPad = LandingPads[i];
+ for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
+ unsigned BeginLabel = LandingPad->BeginLabels[j];
+ assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
+ PadRange P = { i, j };
+ PadMap[BeginLabel] = P;
+ }
+ }
+
+ // The end label of the previous invoke or nounwind try-range.
+ unsigned LastLabel = 0;
+
+ // Whether there is a potentially throwing instruction (currently this means
+ // an ordinary call) between the end of the previous try-range and now.
+ bool SawPotentiallyThrowing = false;
+
+ // Whether the last callsite entry was for an invoke.
+ bool PreviousIsInvoke = false;
+
+ // Visit all instructions in order of address.
+ for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
+ I != E; ++I) {
+ for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
+ MI != E; ++MI) {
+ if (!MI->isLabel()) {
+ SawPotentiallyThrowing |= MI->getDesc().isCall();
+ continue;
+ }
+
+ unsigned BeginLabel = MI->getOperand(0).getImm();
+ assert(BeginLabel && "Invalid label!");
+
+ // End of the previous try-range?
+ if (BeginLabel == LastLabel)
+ SawPotentiallyThrowing = false;
+
+ // Beginning of a new try-range?
+ RangeMapType::iterator L = PadMap.find(BeginLabel);
+ if (L == PadMap.end())
+ // Nope, it was just some random label.
+ continue;
+
+ PadRange P = L->second;
+ const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
+
+ assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
+ "Inconsistent landing pad map!");
+
+ // If some instruction between the previous try-range and this one may
+ // throw, create a call-site entry with no landing pad for the region
+ // between the try-ranges.
+ if (SawPotentiallyThrowing) {
+ CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
+ CallSites.push_back(Site);
+ PreviousIsInvoke = false;
+ }
+
+ LastLabel = LandingPad->EndLabels[P.RangeIndex];
+ assert(BeginLabel && LastLabel && "Invalid landing pad!");
+
+ if (LandingPad->LandingPadLabel) {
+ // This try-range is for an invoke.
+ CallSiteEntry Site = {BeginLabel, LastLabel,
+ LandingPad->LandingPadLabel,
+ FirstActions[P.PadIndex]};
+
+ // Try to merge with the previous call-site.
+ if (PreviousIsInvoke) {
+ CallSiteEntry &Prev = CallSites.back();
+ if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
+ // Extend the range of the previous entry.
+ Prev.EndLabel = Site.EndLabel;
+ continue;
+ }
+ }
+
+ // Otherwise, create a new call-site.
+ CallSites.push_back(Site);
+ PreviousIsInvoke = true;
+ } else {
+ // Create a gap.
+ PreviousIsInvoke = false;
+ }
+ }
+ }
+
+ // If some instruction between the previous try-range and the end of the
+ // function may throw, create a call-site entry with no landing pad for the
+ // region following the try-range.
+ if (SawPotentiallyThrowing) {
+ CallSiteEntry Site = {LastLabel, 0, 0, 0};
+ CallSites.push_back(Site);
+ }
+
+ // Final tallies.
+
+ // Call sites.
+ const unsigned SiteStartSize = sizeof(int32_t); // DW_EH_PE_udata4
+ const unsigned SiteLengthSize = sizeof(int32_t); // DW_EH_PE_udata4
+ const unsigned LandingPadSize = sizeof(int32_t); // DW_EH_PE_udata4
+ unsigned SizeSites = CallSites.size() * (SiteStartSize +
+ SiteLengthSize +
+ LandingPadSize);
+ for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
+ SizeSites += TargetAsmInfo::getULEB128Size(CallSites[i].Action);
+
+ // Type infos.
+ const unsigned TypeInfoSize = TD->getPointerSize(); // DW_EH_PE_absptr
+ unsigned SizeTypes = TypeInfos.size() * TypeInfoSize;
+
+ unsigned TypeOffset = sizeof(int8_t) + // Call site format
+ TargetAsmInfo::getULEB128Size(SizeSites) + // Call-site table length
+ SizeSites + SizeActions + SizeTypes;
+
+ unsigned TotalSize = sizeof(int8_t) + // LPStart format
+ sizeof(int8_t) + // TType format
+ TargetAsmInfo::getULEB128Size(TypeOffset) + // TType base offset
+ TypeOffset;
+
+ unsigned SizeAlign = (4 - TotalSize) & 3;
+
+ // Begin the exception table.
+ Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
+ Asm->EmitAlignment(2, 0, 0, false);
+ O << "GCC_except_table" << SubprogramCount << ":\n";
+
+ for (unsigned i = 0; i != SizeAlign; ++i) {
+ Asm->EmitInt8(0);
+ Asm->EOL("Padding");
+ }
+
+ EmitLabel("exception", SubprogramCount);
+
+ // Emit the header.
+ Asm->EmitInt8(dwarf::DW_EH_PE_omit);
+ Asm->EOL("LPStart format (DW_EH_PE_omit)");
+ Asm->EmitInt8(dwarf::DW_EH_PE_absptr);
+ Asm->EOL("TType format (DW_EH_PE_absptr)");
+ Asm->EmitULEB128Bytes(TypeOffset);
+ Asm->EOL("TType base offset");
+ Asm->EmitInt8(dwarf::DW_EH_PE_udata4);
+ Asm->EOL("Call site format (DW_EH_PE_udata4)");
+ Asm->EmitULEB128Bytes(SizeSites);
+ Asm->EOL("Call-site table length");
+
+ // Emit the landing pad site information.
+ for (unsigned i = 0; i < CallSites.size(); ++i) {
+ CallSiteEntry &S = CallSites[i];
+ const char *BeginTag;
+ unsigned BeginNumber;
+
+ if (!S.BeginLabel) {
+ BeginTag = "eh_func_begin";
+ BeginNumber = SubprogramCount;
+ } else {
+ BeginTag = "label";
+ BeginNumber = S.BeginLabel;
+ }
+
+ EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount,
+ true, true);
+ Asm->EOL("Region start");
+
+ if (!S.EndLabel)
+ EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber,
+ true);
+ else
+ EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true);
+
+ Asm->EOL("Region length");
+
+ if (!S.PadLabel)
+ Asm->EmitInt32(0);
+ else
+ EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
+ true, true);
+
+ Asm->EOL("Landing pad");
+
+ Asm->EmitULEB128Bytes(S.Action);
+ Asm->EOL("Action");
+ }
+
+ // Emit the actions.
+ for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
+ ActionEntry &Action = Actions[I];
+
+ Asm->EmitSLEB128Bytes(Action.ValueForTypeID);
+ Asm->EOL("TypeInfo index");
+ Asm->EmitSLEB128Bytes(Action.NextAction);
+ Asm->EOL("Next action");
+ }
+
+ // Emit the type ids.
+ for (unsigned M = TypeInfos.size(); M; --M) {
+ GlobalVariable *GV = TypeInfos[M - 1];
+ PrintRelDirective();
+
+ if (GV) {
+ std::string GLN;
+ O << Asm->getGlobalLinkName(GV, GLN);
+ } else {
+ O << "0";
+ }
+
+ Asm->EOL("TypeInfo");
+ }
+
+ // Emit the filter typeids.
+ for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
+ unsigned TypeID = FilterIds[j];
+ Asm->EmitULEB128Bytes(TypeID);
+ Asm->EOL("Filter TypeInfo index");
+ }
+
+ Asm->EmitAlignment(2, 0, 0, false);
+}
+
+/// EndModule - Emit all exception information that should come after the
+/// content.
+void DwarfException::EndModule() {
+ if (TimePassesIsEnabled)
+ ExceptionTimer->startTimer();
+
+ if (shouldEmitMovesModule || shouldEmitTableModule) {
+ const std::vector<Function *> Personalities = MMI->getPersonalities();
+ for (unsigned i = 0; i < Personalities.size(); ++i)
+ EmitCommonEHFrame(Personalities[i], i);
+
+ for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
+ E = EHFrames.end(); I != E; ++I)
+ EmitEHFrame(*I);
+ }
+
+ if (TimePassesIsEnabled)
+ ExceptionTimer->stopTimer();
+}
+
+/// BeginFunction - Gather pre-function exception information. Assumes being
+/// emitted immediately after the function entry point.
+void DwarfException::BeginFunction(MachineFunction *MF) {
+ if (TimePassesIsEnabled)
+ ExceptionTimer->startTimer();
+
+ this->MF = MF;
+ shouldEmitTable = shouldEmitMoves = false;
+
+ if (MMI && TAI->doesSupportExceptionHandling()) {
+ // Map all labels and get rid of any dead landing pads.
+ MMI->TidyLandingPads();
+
+ // If any landing pads survive, we need an EH table.
+ if (MMI->getLandingPads().size())
+ shouldEmitTable = true;
+
+ // See if we need frame move info.
+ if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory)
+ shouldEmitMoves = true;
+
+ if (shouldEmitMoves || shouldEmitTable)
+ // Assumes in correct section after the entry point.
+ EmitLabel("eh_func_begin", ++SubprogramCount);
+ }
+
+ shouldEmitTableModule |= shouldEmitTable;
+ shouldEmitMovesModule |= shouldEmitMoves;
+
+ if (TimePassesIsEnabled)
+ ExceptionTimer->stopTimer();
+}
+
+/// EndFunction - Gather and emit post-function exception information.
+///
+void DwarfException::EndFunction() {
+ if (TimePassesIsEnabled)
+ ExceptionTimer->startTimer();
+
+ if (shouldEmitMoves || shouldEmitTable) {
+ EmitLabel("eh_func_end", SubprogramCount);
+ EmitExceptionTable();
+
+ // Save EH frame information
+ std::string Name;
+ EHFrames.push_back(
+ FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF, Name),
+ SubprogramCount,
+ MMI->getPersonalityIndex(),
+ MF->getFrameInfo()->hasCalls(),
+ !MMI->getLandingPads().empty(),
+ MMI->getFrameMoves(),
+ MF->getFunction()));
+ }
+
+ if (TimePassesIsEnabled)
+ ExceptionTimer->stopTimer();
+}
diff --git a/lib/CodeGen/AsmPrinter/DwarfException.h b/lib/CodeGen/AsmPrinter/DwarfException.h
new file mode 100644
index 0000000..4479af2
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DwarfException.h
@@ -0,0 +1,178 @@
+//===-- DwarfException.h - Dwarf Exception Framework -----------*- C++ -*--===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing dwarf exception info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_ASMPRINTER_DWARFEXCEPTION_H__
+#define CODEGEN_ASMPRINTER_DWARFEXCEPTION_H__
+
+#include "DIE.h"
+#include "DwarfPrinter.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/ADT/DenseMap.h"
+#include <string>
+
+namespace llvm {
+
+struct LandingPadInfo;
+class MachineModuleInfo;
+class TargetAsmInfo;
+class Timer;
+class raw_ostream;
+
+//===----------------------------------------------------------------------===//
+/// DwarfException - Emits Dwarf exception handling directives.
+///
+class VISIBILITY_HIDDEN DwarfException : public Dwarf {
+ struct FunctionEHFrameInfo {
+ std::string FnName;
+ unsigned Number;
+ unsigned PersonalityIndex;
+ bool hasCalls;
+ bool hasLandingPads;
+ std::vector<MachineMove> Moves;
+ const Function * function;
+
+ FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
+ bool hC, bool hL,
+ const std::vector<MachineMove> &M,
+ const Function *f):
+ FnName(FN), Number(Num), PersonalityIndex(P),
+ hasCalls(hC), hasLandingPads(hL), Moves(M), function (f) { }
+ };
+
+ std::vector<FunctionEHFrameInfo> EHFrames;
+
+ /// shouldEmitTable - Per-function flag to indicate if EH tables should
+ /// be emitted.
+ bool shouldEmitTable;
+
+ /// shouldEmitMoves - Per-function flag to indicate if frame moves info
+ /// should be emitted.
+ bool shouldEmitMoves;
+
+ /// shouldEmitTableModule - Per-module flag to indicate if EH tables
+ /// should be emitted.
+ bool shouldEmitTableModule;
+
+ /// shouldEmitFrameModule - Per-module flag to indicate if frame moves
+ /// should be emitted.
+ bool shouldEmitMovesModule;
+
+ /// ExceptionTimer - Timer for the Dwarf exception writer.
+ Timer *ExceptionTimer;
+
+ /// EmitCommonEHFrame - Emit the common eh unwind frame.
+ ///
+ void EmitCommonEHFrame(const Function *Personality, unsigned Index);
+
+ /// EmitEHFrame - Emit function exception frame information.
+ ///
+ void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo);
+
+ /// EmitExceptionTable - Emit landing pads and actions.
+ ///
+ /// The general organization of the table is complex, but the basic concepts
+ /// are easy. First there is a header which describes the location and
+ /// organization of the three components that follow.
+ /// 1. The landing pad site information describes the range of code covered
+ /// by the try. In our case it's an accumulation of the ranges covered
+ /// by the invokes in the try. There is also a reference to the landing
+ /// pad that handles the exception once processed. Finally an index into
+ /// the actions table.
+ /// 2. The action table, in our case, is composed of pairs of type ids
+ /// and next action offset. Starting with the action index from the
+ /// landing pad site, each type Id is checked for a match to the current
+ /// exception. If it matches then the exception and type id are passed
+ /// on to the landing pad. Otherwise the next action is looked up. This
+ /// chain is terminated with a next action of zero. If no type id is
+ /// found the the frame is unwound and handling continues.
+ /// 3. Type id table contains references to all the C++ typeinfo for all
+ /// catches in the function. This tables is reversed indexed base 1.
+
+ /// SharedTypeIds - How many leading type ids two landing pads have in common.
+ static unsigned SharedTypeIds(const LandingPadInfo *L,
+ const LandingPadInfo *R);
+
+ /// PadLT - Order landing pads lexicographically by type id.
+ static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R);
+
+ struct KeyInfo {
+ static inline unsigned getEmptyKey() { return -1U; }
+ static inline unsigned getTombstoneKey() { return -2U; }
+ static unsigned getHashValue(const unsigned &Key) { return Key; }
+ static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
+ static bool isPod() { return true; }
+ };
+
+ /// ActionEntry - Structure describing an entry in the actions table.
+ struct ActionEntry {
+ int ValueForTypeID; // The value to write - may not be equal to the type id.
+ int NextAction;
+ struct ActionEntry *Previous;
+ };
+
+ /// PadRange - Structure holding a try-range and the associated landing pad.
+ struct PadRange {
+ // The index of the landing pad.
+ unsigned PadIndex;
+ // The index of the begin and end labels in the landing pad's label lists.
+ unsigned RangeIndex;
+ };
+
+ typedef DenseMap<unsigned, PadRange, KeyInfo> RangeMapType;
+
+ /// CallSiteEntry - Structure describing an entry in the call-site table.
+ struct CallSiteEntry {
+ // The 'try-range' is BeginLabel .. EndLabel.
+ unsigned BeginLabel; // zero indicates the start of the function.
+ unsigned EndLabel; // zero indicates the end of the function.
+ // The landing pad starts at PadLabel.
+ unsigned PadLabel; // zero indicates that there is no landing pad.
+ unsigned Action;
+ };
+
+ void EmitExceptionTable();
+
+public:
+ //===--------------------------------------------------------------------===//
+ // Main entry points.
+ //
+ DwarfException(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T);
+ virtual ~DwarfException();
+
+ /// SetModuleInfo - Set machine module information when it's known that pass
+ /// manager has created it. Set by the target AsmPrinter.
+ void SetModuleInfo(MachineModuleInfo *mmi) {
+ MMI = mmi;
+ }
+
+ /// BeginModule - Emit all exception information that should come prior to the
+ /// content.
+ void BeginModule(Module *M) {
+ this->M = M;
+ }
+
+ /// EndModule - Emit all exception information that should come after the
+ /// content.
+ void EndModule();
+
+ /// BeginFunction - Gather pre-function exception information. Assumes being
+ /// emitted immediately after the function entry point.
+ void BeginFunction(MachineFunction *MF);
+
+ /// EndFunction - Gather and emit post-function exception information.
+ void EndFunction();
+};
+
+} // End of namespace llvm
+
+#endif
diff --git a/lib/CodeGen/AsmPrinter/DwarfLabel.cpp b/lib/CodeGen/AsmPrinter/DwarfLabel.cpp
new file mode 100644
index 0000000..8021b7c
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DwarfLabel.cpp
@@ -0,0 +1,35 @@
+//===--- lib/CodeGen/DwarfLabel.cpp - Dwarf Label -------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// DWARF Labels
+//
+//===----------------------------------------------------------------------===//
+
+#include "DwarfLabel.h"
+#include "llvm/ADT/FoldingSet.h"
+#include <ostream>
+
+using namespace llvm;
+
+/// Profile - Used to gather unique data for the folding set.
+///
+void DWLabel::Profile(FoldingSetNodeID &ID) const {
+ ID.AddString(Tag);
+ ID.AddInteger(Number);
+}
+
+#ifndef NDEBUG
+void DWLabel::print(std::ostream *O) const {
+ if (O) print(*O);
+}
+void DWLabel::print(std::ostream &O) const {
+ O << "." << Tag;
+ if (Number) O << Number;
+}
+#endif
diff --git a/lib/CodeGen/AsmPrinter/DwarfLabel.h b/lib/CodeGen/AsmPrinter/DwarfLabel.h
new file mode 100644
index 0000000..b493903
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DwarfLabel.h
@@ -0,0 +1,56 @@
+//===--- lib/CodeGen/DwarfLabel.h - Dwarf Label -----------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// DWARF Labels.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_ASMPRINTER_DWARFLABEL_H__
+#define CODEGEN_ASMPRINTER_DWARFLABEL_H__
+
+#include "llvm/Support/Compiler.h"
+#include <iosfwd>
+#include <vector>
+
+namespace llvm {
+ class FoldingSetNodeID;
+
+ //===--------------------------------------------------------------------===//
+ /// DWLabel - Labels are used to track locations in the assembler file.
+ /// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
+ /// where the tag is a category of label (Ex. location) and number is a value
+ /// unique in that category.
+ class VISIBILITY_HIDDEN DWLabel {
+ /// Tag - Label category tag. Should always be a statically declared C
+ /// string.
+ ///
+ const char *Tag;
+
+ /// Number - Value to make label unique.
+ ///
+ unsigned Number;
+ public:
+ DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
+
+ // Accessors.
+ const char *getTag() const { return Tag; }
+ unsigned getNumber() const { return Number; }
+
+ /// Profile - Used to gather unique data for the folding set.
+ ///
+ void Profile(FoldingSetNodeID &ID) const;
+
+#ifndef NDEBUG
+ void print(std::ostream *O) const;
+ void print(std::ostream &O) const;
+#endif
+ };
+} // end llvm namespace
+
+#endif
diff --git a/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp b/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
new file mode 100644
index 0000000..45e7dd3
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
@@ -0,0 +1,235 @@
+//===--- lib/CodeGen/DwarfPrinter.cpp - Dwarf Printer ---------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Emit general DWARF directives.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DwarfPrinter.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include <ostream>
+
+using namespace llvm;
+
+Dwarf::Dwarf(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
+ const char *flavor)
+: O(OS), Asm(A), TAI(T), TD(Asm->TM.getTargetData()),
+ RI(Asm->TM.getRegisterInfo()), M(NULL), MF(NULL), MMI(NULL),
+ SubprogramCount(0), Flavor(flavor), SetCounter(1) {}
+
+void Dwarf::PrintRelDirective(bool Force32Bit, bool isInSection) const {
+ if (isInSection && TAI->getDwarfSectionOffsetDirective())
+ O << TAI->getDwarfSectionOffsetDirective();
+ else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+}
+
+/// PrintLabelName - Print label name in form used by Dwarf writer.
+///
+void Dwarf::PrintLabelName(const char *Tag, unsigned Number) const {
+ O << TAI->getPrivateGlobalPrefix() << Tag;
+ if (Number) O << Number;
+}
+void Dwarf::PrintLabelName(const char *Tag, unsigned Number,
+ const char *Suffix) const {
+ O << TAI->getPrivateGlobalPrefix() << Tag;
+ if (Number) O << Number;
+ O << Suffix;
+}
+
+/// EmitLabel - Emit location label for internal use by Dwarf.
+///
+void Dwarf::EmitLabel(const char *Tag, unsigned Number) const {
+ PrintLabelName(Tag, Number);
+ O << ":\n";
+}
+
+/// EmitReference - Emit a reference to a label.
+///
+void Dwarf::EmitReference(const char *Tag, unsigned Number,
+ bool IsPCRelative, bool Force32Bit) const {
+ PrintRelDirective(Force32Bit);
+ PrintLabelName(Tag, Number);
+ if (IsPCRelative) O << "-" << TAI->getPCSymbol();
+}
+void Dwarf::EmitReference(const std::string &Name, bool IsPCRelative,
+ bool Force32Bit) const {
+ PrintRelDirective(Force32Bit);
+ O << Name;
+ if (IsPCRelative) O << "-" << TAI->getPCSymbol();
+}
+
+/// EmitDifference - Emit the difference between two labels. Some assemblers do
+/// not behave with absolute expressions with data directives, so there is an
+/// option (needsSet) to use an intermediary set expression.
+void Dwarf::EmitDifference(const char *TagHi, unsigned NumberHi,
+ const char *TagLo, unsigned NumberLo,
+ bool IsSmall) {
+ if (TAI->needsSet()) {
+ O << "\t.set\t";
+ PrintLabelName("set", SetCounter, Flavor);
+ O << ",";
+ PrintLabelName(TagHi, NumberHi);
+ O << "-";
+ PrintLabelName(TagLo, NumberLo);
+ O << "\n";
+
+ PrintRelDirective(IsSmall);
+ PrintLabelName("set", SetCounter, Flavor);
+ ++SetCounter;
+ } else {
+ PrintRelDirective(IsSmall);
+ PrintLabelName(TagHi, NumberHi);
+ O << "-";
+ PrintLabelName(TagLo, NumberLo);
+ }
+}
+
+void Dwarf::EmitSectionOffset(const char* Label, const char* Section,
+ unsigned LabelNumber, unsigned SectionNumber,
+ bool IsSmall, bool isEH,
+ bool useSet) {
+ bool printAbsolute = false;
+ if (isEH)
+ printAbsolute = TAI->isAbsoluteEHSectionOffsets();
+ else
+ printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
+
+ if (TAI->needsSet() && useSet) {
+ O << "\t.set\t";
+ PrintLabelName("set", SetCounter, Flavor);
+ O << ",";
+ PrintLabelName(Label, LabelNumber);
+
+ if (!printAbsolute) {
+ O << "-";
+ PrintLabelName(Section, SectionNumber);
+ }
+
+ O << "\n";
+ PrintRelDirective(IsSmall);
+ PrintLabelName("set", SetCounter, Flavor);
+ ++SetCounter;
+ } else {
+ PrintRelDirective(IsSmall, true);
+ PrintLabelName(Label, LabelNumber);
+
+ if (!printAbsolute) {
+ O << "-";
+ PrintLabelName(Section, SectionNumber);
+ }
+ }
+}
+
+/// EmitFrameMoves - Emit frame instructions to describe the layout of the
+/// frame.
+void Dwarf::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
+ const std::vector<MachineMove> &Moves, bool isEH) {
+ int stackGrowth =
+ Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
+ TargetFrameInfo::StackGrowsUp ?
+ TD->getPointerSize() : -TD->getPointerSize();
+ bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
+
+ for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
+ const MachineMove &Move = Moves[i];
+ unsigned LabelID = Move.getLabelID();
+
+ if (LabelID) {
+ LabelID = MMI->MappedLabel(LabelID);
+
+ // Throw out move if the label is invalid.
+ if (!LabelID) continue;
+ }
+
+ const MachineLocation &Dst = Move.getDestination();
+ const MachineLocation &Src = Move.getSource();
+
+ // Advance row if new location.
+ if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
+ Asm->EmitInt8(dwarf::DW_CFA_advance_loc4);
+ Asm->EOL("DW_CFA_advance_loc4");
+ EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
+ Asm->EOL();
+
+ BaseLabelID = LabelID;
+ BaseLabel = "label";
+ IsLocal = true;
+ }
+
+ // If advancing cfa.
+ if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
+ if (!Src.isReg()) {
+ if (Src.getReg() == MachineLocation::VirtualFP) {
+ Asm->EmitInt8(dwarf::DW_CFA_def_cfa_offset);
+ Asm->EOL("DW_CFA_def_cfa_offset");
+ } else {
+ Asm->EmitInt8(dwarf::DW_CFA_def_cfa);
+ Asm->EOL("DW_CFA_def_cfa");
+ Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getReg(), isEH));
+ Asm->EOL("Register");
+ }
+
+ int Offset = -Src.getOffset();
+
+ Asm->EmitULEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ } else {
+ assert(0 && "Machine move no supported yet.");
+ }
+ } else if (Src.isReg() &&
+ Src.getReg() == MachineLocation::VirtualFP) {
+ if (Dst.isReg()) {
+ Asm->EmitInt8(dwarf::DW_CFA_def_cfa_register);
+ Asm->EOL("DW_CFA_def_cfa_register");
+ Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getReg(), isEH));
+ Asm->EOL("Register");
+ } else {
+ assert(0 && "Machine move no supported yet.");
+ }
+ } else {
+ unsigned Reg = RI->getDwarfRegNum(Src.getReg(), isEH);
+ int Offset = Dst.getOffset() / stackGrowth;
+
+ if (Offset < 0) {
+ Asm->EmitInt8(dwarf::DW_CFA_offset_extended_sf);
+ Asm->EOL("DW_CFA_offset_extended_sf");
+ Asm->EmitULEB128Bytes(Reg);
+ Asm->EOL("Reg");
+ Asm->EmitSLEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ } else if (Reg < 64) {
+ Asm->EmitInt8(dwarf::DW_CFA_offset + Reg);
+ if (Asm->isVerbose())
+ Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")");
+ else
+ Asm->EOL();
+ Asm->EmitULEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ } else {
+ Asm->EmitInt8(dwarf::DW_CFA_offset_extended);
+ Asm->EOL("DW_CFA_offset_extended");
+ Asm->EmitULEB128Bytes(Reg);
+ Asm->EOL("Reg");
+ Asm->EmitULEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ }
+ }
+ }
+}
diff --git a/lib/CodeGen/AsmPrinter/DwarfPrinter.h b/lib/CodeGen/AsmPrinter/DwarfPrinter.h
new file mode 100644
index 0000000..6e75992
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DwarfPrinter.h
@@ -0,0 +1,153 @@
+//===--- lib/CodeGen/DwarfPrinter.h - Dwarf Printer -------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Emit general DWARF directives.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_ASMPRINTER_DWARFPRINTER_H__
+#define CODEGEN_ASMPRINTER_DWARFPRINTER_H__
+
+#include "DwarfLabel.h"
+#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/raw_ostream.h"
+#include <vector>
+
+namespace llvm {
+ class AsmPrinter;
+ class MachineFunction;
+ class MachineModuleInfo;
+ class Module;
+ class TargetAsmInfo;
+ class TargetData;
+ class TargetRegisterInfo;
+
+ class VISIBILITY_HIDDEN Dwarf {
+ protected:
+ //===-------------------------------------------------------------==---===//
+ // Core attributes used by the DWARF printer.
+ //
+
+ /// O - Stream to .s file.
+ ///
+ raw_ostream &O;
+
+ /// Asm - Target of Dwarf emission.
+ ///
+ AsmPrinter *Asm;
+
+ /// TAI - Target asm information.
+ ///
+ const TargetAsmInfo *TAI;
+
+ /// TD - Target data.
+ ///
+ const TargetData *TD;
+
+ /// RI - Register Information.
+ ///
+ const TargetRegisterInfo *RI;
+
+ /// M - Current module.
+ ///
+ Module *M;
+
+ /// MF - Current machine function.
+ ///
+ MachineFunction *MF;
+
+ /// MMI - Collected machine module information.
+ ///
+ MachineModuleInfo *MMI;
+
+ /// SubprogramCount - The running count of functions being compiled.
+ ///
+ unsigned SubprogramCount;
+
+ /// Flavor - A unique string indicating what dwarf producer this is, used to
+ /// unique labels.
+ ///
+ const char * const Flavor;
+
+ /// SetCounter - A unique number for each '.set' directive.
+ ///
+ unsigned SetCounter;
+
+ Dwarf(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
+ const char *flavor);
+ public:
+ //===------------------------------------------------------------------===//
+ // Accessors.
+ //
+ const AsmPrinter *getAsm() const { return Asm; }
+ MachineModuleInfo *getMMI() const { return MMI; }
+ const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
+ const TargetData *getTargetData() const { return TD; }
+
+ void PrintRelDirective(bool Force32Bit = false,
+ bool isInSection = false) const;
+
+
+ /// PrintLabelName - Print label name in form used by Dwarf writer.
+ ///
+ void PrintLabelName(const DWLabel &Label) const {
+ PrintLabelName(Label.getTag(), Label.getNumber());
+ }
+ void PrintLabelName(const char *Tag, unsigned Number) const;
+ void PrintLabelName(const char *Tag, unsigned Number,
+ const char *Suffix) const;
+
+ /// EmitLabel - Emit location label for internal use by Dwarf.
+ ///
+ void EmitLabel(const DWLabel &Label) const {
+ EmitLabel(Label.getTag(), Label.getNumber());
+ }
+ void EmitLabel(const char *Tag, unsigned Number) const;
+
+ /// EmitReference - Emit a reference to a label.
+ ///
+ void EmitReference(const DWLabel &Label, bool IsPCRelative = false,
+ bool Force32Bit = false) const {
+ EmitReference(Label.getTag(), Label.getNumber(),
+ IsPCRelative, Force32Bit);
+ }
+ void EmitReference(const char *Tag, unsigned Number,
+ bool IsPCRelative = false,
+ bool Force32Bit = false) const;
+ void EmitReference(const std::string &Name, bool IsPCRelative = false,
+ bool Force32Bit = false) const;
+
+ /// EmitDifference - Emit the difference between two labels. Some
+ /// assemblers do not behave with absolute expressions with data directives,
+ /// so there is an option (needsSet) to use an intermediary set expression.
+ void EmitDifference(const DWLabel &LabelHi, const DWLabel &LabelLo,
+ bool IsSmall = false) {
+ EmitDifference(LabelHi.getTag(), LabelHi.getNumber(),
+ LabelLo.getTag(), LabelLo.getNumber(),
+ IsSmall);
+ }
+ void EmitDifference(const char *TagHi, unsigned NumberHi,
+ const char *TagLo, unsigned NumberLo,
+ bool IsSmall = false);
+
+ void EmitSectionOffset(const char* Label, const char* Section,
+ unsigned LabelNumber, unsigned SectionNumber,
+ bool IsSmall = false, bool isEH = false,
+ bool useSet = true);
+
+ /// EmitFrameMoves - Emit frame instructions to describe the layout of the
+ /// frame.
+ void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
+ const std::vector<MachineMove> &Moves, bool isEH);
+};
+
+} // end llvm namespace
+
+#endif
diff --git a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
new file mode 100644
index 0000000..483ee559
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
@@ -0,0 +1,129 @@
+//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework --------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing dwarf info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "DwarfDebug.h"
+#include "DwarfException.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+
+using namespace llvm;
+
+static RegisterPass<DwarfWriter>
+X("dwarfwriter", "DWARF Information Writer");
+char DwarfWriter::ID = 0;
+
+//===----------------------------------------------------------------------===//
+/// DwarfWriter Implementation
+///
+
+DwarfWriter::DwarfWriter()
+ : ImmutablePass(&ID), DD(0), DE(0) {}
+
+DwarfWriter::~DwarfWriter() {
+ delete DE;
+ delete DD;
+}
+
+/// BeginModule - Emit all Dwarf sections that should come prior to the
+/// content.
+void DwarfWriter::BeginModule(Module *M,
+ MachineModuleInfo *MMI,
+ raw_ostream &OS, AsmPrinter *A,
+ const TargetAsmInfo *T) {
+ DE = new DwarfException(OS, A, T);
+ DD = new DwarfDebug(OS, A, T);
+ DE->BeginModule(M);
+ DD->BeginModule(M);
+ DD->SetDebugInfo(MMI);
+ DE->SetModuleInfo(MMI);
+}
+
+/// EndModule - Emit all Dwarf sections that should come after the content.
+///
+void DwarfWriter::EndModule() {
+ DE->EndModule();
+ DD->EndModule();
+}
+
+/// BeginFunction - Gather pre-function debug information. Assumes being
+/// emitted immediately after the function entry point.
+void DwarfWriter::BeginFunction(MachineFunction *MF) {
+ DE->BeginFunction(MF);
+ DD->BeginFunction(MF);
+}
+
+/// EndFunction - Gather and emit post-function debug information.
+///
+void DwarfWriter::EndFunction(MachineFunction *MF) {
+ DD->EndFunction(MF);
+ DE->EndFunction();
+
+ if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI())
+ // Clear function debug information.
+ MMI->EndFunction();
+}
+
+/// RecordSourceLine - Records location information and associates it with a
+/// label. Returns a unique label ID used to generate a label and provide
+/// correspondence to the source line list.
+unsigned DwarfWriter::RecordSourceLine(unsigned Line, unsigned Col,
+ DICompileUnit CU) {
+ return DD->RecordSourceLine(Line, Col, CU);
+}
+
+/// RecordRegionStart - Indicate the start of a region.
+unsigned DwarfWriter::RecordRegionStart(GlobalVariable *V) {
+ return DD->RecordRegionStart(V);
+}
+
+/// RecordRegionEnd - Indicate the end of a region.
+unsigned DwarfWriter::RecordRegionEnd(GlobalVariable *V) {
+ return DD->RecordRegionEnd(V);
+}
+
+/// getRecordSourceLineCount - Count source lines.
+unsigned DwarfWriter::getRecordSourceLineCount() {
+ return DD->getRecordSourceLineCount();
+}
+
+/// RecordVariable - Indicate the declaration of a local variable.
+///
+void DwarfWriter::RecordVariable(GlobalVariable *GV, unsigned FrameIndex,
+ const MachineInstr *MI) {
+ DD->RecordVariable(GV, FrameIndex, MI);
+}
+
+/// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
+/// be emitted.
+bool DwarfWriter::ShouldEmitDwarfDebug() const {
+ return DD && DD->ShouldEmitDwarfDebug();
+}
+
+//// RecordInlinedFnStart - Global variable GV is inlined at the location marked
+//// by LabelID label.
+unsigned DwarfWriter::RecordInlinedFnStart(DISubprogram SP, DICompileUnit CU,
+ unsigned Line, unsigned Col) {
+ return DD->RecordInlinedFnStart(SP, CU, Line, Col);
+}
+
+/// RecordInlinedFnEnd - Indicate the end of inlined subroutine.
+unsigned DwarfWriter::RecordInlinedFnEnd(DISubprogram SP) {
+ return DD->RecordInlinedFnEnd(SP);
+}
+
+/// RecordVariableScope - Record scope for the variable declared by
+/// DeclareMI. DeclareMI must describe TargetInstrInfo::DECLARE.
+void DwarfWriter::RecordVariableScope(DIVariable &DV,
+ const MachineInstr *DeclareMI) {
+ DD->RecordVariableScope(DV, DeclareMI);
+}
diff --git a/lib/CodeGen/AsmPrinter/Makefile b/lib/CodeGen/AsmPrinter/Makefile
new file mode 100644
index 0000000..cb5b3f6
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/Makefile
@@ -0,0 +1,15 @@
+##===- lib/CodeGen/SelectionDAG/Makefile -------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+LEVEL = ../../..
+LIBRARYNAME = LLVMAsmPrinter
+PARALLEL_DIRS =
+BUILD_ARCHIVE = 1
+DONT_BUILD_RELINKED = 1
+
+include $(LEVEL)/Makefile.common
diff --git a/lib/CodeGen/AsmPrinter/OcamlGCPrinter.cpp b/lib/CodeGen/AsmPrinter/OcamlGCPrinter.cpp
new file mode 100644
index 0000000..8ba903a
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/OcamlGCPrinter.cpp
@@ -0,0 +1,160 @@
+//===-- OcamlGCPrinter.cpp - Ocaml frametable emitter ---------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements printing the assembly code for an Ocaml frametable.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/GCs.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/GCMetadataPrinter.h"
+#include "llvm/Module.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+
+using namespace llvm;
+
+namespace {
+
+ class VISIBILITY_HIDDEN OcamlGCMetadataPrinter : public GCMetadataPrinter {
+ public:
+ void beginAssembly(raw_ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI);
+
+ void finishAssembly(raw_ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI);
+ };
+
+}
+
+static GCMetadataPrinterRegistry::Add<OcamlGCMetadataPrinter>
+Y("ocaml", "ocaml 3.10-compatible collector");
+
+void llvm::linkOcamlGCPrinter() { }
+
+static void EmitCamlGlobal(const Module &M, raw_ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI, const char *Id) {
+ const std::string &MId = M.getModuleIdentifier();
+
+ std::string Mangled;
+ Mangled += TAI.getGlobalPrefix();
+ Mangled += "caml";
+ size_t Letter = Mangled.size();
+ Mangled.append(MId.begin(), std::find(MId.begin(), MId.end(), '.'));
+ Mangled += "__";
+ Mangled += Id;
+
+ // Capitalize the first letter of the module name.
+ Mangled[Letter] = toupper(Mangled[Letter]);
+
+ if (const char *GlobalDirective = TAI.getGlobalDirective())
+ OS << GlobalDirective << Mangled << "\n";
+ OS << Mangled << ":\n";
+}
+
+void OcamlGCMetadataPrinter::beginAssembly(raw_ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI) {
+ AP.SwitchToSection(TAI.getTextSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "code_begin");
+
+ AP.SwitchToSection(TAI.getDataSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "data_begin");
+}
+
+/// emitAssembly - Print the frametable. The ocaml frametable format is thus:
+///
+/// extern "C" struct align(sizeof(intptr_t)) {
+/// uint16_t NumDescriptors;
+/// struct align(sizeof(intptr_t)) {
+/// void *ReturnAddress;
+/// uint16_t FrameSize;
+/// uint16_t NumLiveOffsets;
+/// uint16_t LiveOffsets[NumLiveOffsets];
+/// } Descriptors[NumDescriptors];
+/// } caml${module}__frametable;
+///
+/// Note that this precludes programs from stack frames larger than 64K
+/// (FrameSize and LiveOffsets would overflow). FrameTablePrinter will abort if
+/// either condition is detected in a function which uses the GC.
+///
+void OcamlGCMetadataPrinter::finishAssembly(raw_ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI) {
+ const char *AddressDirective;
+ int AddressAlignLog;
+ if (AP.TM.getTargetData()->getPointerSize() == sizeof(int32_t)) {
+ AddressDirective = TAI.getData32bitsDirective();
+ AddressAlignLog = 2;
+ } else {
+ AddressDirective = TAI.getData64bitsDirective();
+ AddressAlignLog = 3;
+ }
+
+ AP.SwitchToSection(TAI.getTextSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "code_end");
+
+ AP.SwitchToSection(TAI.getDataSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "data_end");
+
+ OS << AddressDirective << 0; // FIXME: Why does ocaml emit this??
+ AP.EOL();
+
+ AP.SwitchToSection(TAI.getDataSection());
+ EmitCamlGlobal(getModule(), OS, AP, TAI, "frametable");
+
+ for (iterator I = begin(), IE = end(); I != IE; ++I) {
+ GCFunctionInfo &FI = **I;
+
+ uint64_t FrameSize = FI.getFrameSize();
+ if (FrameSize >= 1<<16) {
+ cerr << "Function '" << FI.getFunction().getNameStart()
+ << "' is too large for the ocaml GC! "
+ << "Frame size " << FrameSize << " >= 65536.\n";
+ cerr << "(" << uintptr_t(&FI) << ")\n";
+ abort(); // Very rude!
+ }
+
+ OS << "\t" << TAI.getCommentString() << " live roots for "
+ << FI.getFunction().getNameStart() << "\n";
+
+ for (GCFunctionInfo::iterator J = FI.begin(), JE = FI.end(); J != JE; ++J) {
+ size_t LiveCount = FI.live_size(J);
+ if (LiveCount >= 1<<16) {
+ cerr << "Function '" << FI.getFunction().getNameStart()
+ << "' is too large for the ocaml GC! "
+ << "Live root count " << LiveCount << " >= 65536.\n";
+ abort(); // Very rude!
+ }
+
+ OS << AddressDirective
+ << TAI.getPrivateGlobalPrefix() << "label" << J->Num;
+ AP.EOL("call return address");
+
+ AP.EmitInt16(FrameSize);
+ AP.EOL("stack frame size");
+
+ AP.EmitInt16(LiveCount);
+ AP.EOL("live root count");
+
+ for (GCFunctionInfo::live_iterator K = FI.live_begin(J),
+ KE = FI.live_end(J); K != KE; ++K) {
+ assert(K->StackOffset < 1<<16 &&
+ "GC root stack offset is outside of fixed stack frame and out "
+ "of range for ocaml GC!");
+
+ OS << "\t.word\t" << K->StackOffset;
+ AP.EOL("stack offset");
+ }
+
+ AP.EmitAlignment(AddressAlignLog);
+ }
+ }
+}
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