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diff --git a/lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp b/lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp
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+++ b/lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp
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+//===-- PPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly --------=//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to PowerPC assembly language. This printer is
+// the output mechanism used by `llc'.
+//
+// Documentation at http://developer.apple.com/documentation/DeveloperTools/
+// Reference/Assembler/ASMIntroduction/chapter_1_section_1.html
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asmprinter"
+#include "PPC.h"
+#include "PPCPredicates.h"
+#include "PPCTargetMachine.h"
+#include "PPCSubtarget.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringSet.h"
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+namespace {
+ class VISIBILITY_HIDDEN PPCAsmPrinter : public AsmPrinter {
+ protected:
+ StringSet<> FnStubs, GVStubs, HiddenGVStubs;
+ const PPCSubtarget &Subtarget;
+ public:
+ explicit PPCAsmPrinter(raw_ostream &O, TargetMachine &TM,
+ const TargetAsmInfo *T, CodeGenOpt::Level OL,
+ bool V)
+ : AsmPrinter(O, TM, T, OL, V),
+ Subtarget(TM.getSubtarget<PPCSubtarget>()) {}
+
+ virtual const char *getPassName() const {
+ return "PowerPC Assembly Printer";
+ }
+
+ PPCTargetMachine &getTM() {
+ return static_cast<PPCTargetMachine&>(TM);
+ }
+
+ unsigned enumRegToMachineReg(unsigned enumReg) {
+ switch (enumReg) {
+ default: assert(0 && "Unhandled register!"); break;
+ case PPC::CR0: return 0;
+ case PPC::CR1: return 1;
+ case PPC::CR2: return 2;
+ case PPC::CR3: return 3;
+ case PPC::CR4: return 4;
+ case PPC::CR5: return 5;
+ case PPC::CR6: return 6;
+ case PPC::CR7: return 7;
+ }
+ abort();
+ }
+
+ /// printInstruction - This method is automatically generated by tablegen
+ /// from the instruction set description. This method returns true if the
+ /// machine instruction was sufficiently described to print it, otherwise it
+ /// returns false.
+ bool printInstruction(const MachineInstr *MI);
+
+ void printMachineInstruction(const MachineInstr *MI);
+ void printOp(const MachineOperand &MO);
+
+ /// stripRegisterPrefix - This method strips the character prefix from a
+ /// register name so that only the number is left. Used by for linux asm.
+ const char *stripRegisterPrefix(const char *RegName) {
+ switch (RegName[0]) {
+ case 'r':
+ case 'f':
+ case 'v': return RegName + 1;
+ case 'c': if (RegName[1] == 'r') return RegName + 2;
+ }
+
+ return RegName;
+ }
+
+ /// printRegister - Print register according to target requirements.
+ ///
+ void printRegister(const MachineOperand &MO, bool R0AsZero) {
+ unsigned RegNo = MO.getReg();
+ assert(TargetRegisterInfo::isPhysicalRegister(RegNo) && "Not physreg??");
+
+ // If we should use 0 for R0.
+ if (R0AsZero && RegNo == PPC::R0) {
+ O << "0";
+ return;
+ }
+
+ const char *RegName = TM.getRegisterInfo()->get(RegNo).AsmName;
+ // Linux assembler (Others?) does not take register mnemonics.
+ // FIXME - What about special registers used in mfspr/mtspr?
+ if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
+ O << RegName;
+ }
+
+ void printOperand(const MachineInstr *MI, unsigned OpNo) {
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ if (MO.isReg()) {
+ printRegister(MO, false);
+ } else if (MO.isImm()) {
+ O << MO.getImm();
+ } else {
+ printOp(MO);
+ }
+ }
+
+ bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode);
+ bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode);
+
+
+ void printS5ImmOperand(const MachineInstr *MI, unsigned OpNo) {
+ char value = MI->getOperand(OpNo).getImm();
+ value = (value << (32-5)) >> (32-5);
+ O << (int)value;
+ }
+ void printU5ImmOperand(const MachineInstr *MI, unsigned OpNo) {
+ unsigned char value = MI->getOperand(OpNo).getImm();
+ assert(value <= 31 && "Invalid u5imm argument!");
+ O << (unsigned int)value;
+ }
+ void printU6ImmOperand(const MachineInstr *MI, unsigned OpNo) {
+ unsigned char value = MI->getOperand(OpNo).getImm();
+ assert(value <= 63 && "Invalid u6imm argument!");
+ O << (unsigned int)value;
+ }
+ void printS16ImmOperand(const MachineInstr *MI, unsigned OpNo) {
+ O << (short)MI->getOperand(OpNo).getImm();
+ }
+ void printU16ImmOperand(const MachineInstr *MI, unsigned OpNo) {
+ O << (unsigned short)MI->getOperand(OpNo).getImm();
+ }
+ void printS16X4ImmOperand(const MachineInstr *MI, unsigned OpNo) {
+ if (MI->getOperand(OpNo).isImm()) {
+ O << (short)(MI->getOperand(OpNo).getImm()*4);
+ } else {
+ O << "lo16(";
+ printOp(MI->getOperand(OpNo));
+ if (TM.getRelocationModel() == Reloc::PIC_)
+ O << "-\"L" << getFunctionNumber() << "$pb\")";
+ else
+ O << ')';
+ }
+ }
+ void printBranchOperand(const MachineInstr *MI, unsigned OpNo) {
+ // Branches can take an immediate operand. This is used by the branch
+ // selection pass to print $+8, an eight byte displacement from the PC.
+ if (MI->getOperand(OpNo).isImm()) {
+ O << "$+" << MI->getOperand(OpNo).getImm()*4;
+ } else {
+ printOp(MI->getOperand(OpNo));
+ }
+ }
+ void printCallOperand(const MachineInstr *MI, unsigned OpNo) {
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ if (TM.getRelocationModel() != Reloc::Static) {
+ if (MO.getType() == MachineOperand::MO_GlobalAddress) {
+ GlobalValue *GV = MO.getGlobal();
+ if (((GV->isDeclaration() || GV->hasWeakLinkage() ||
+ GV->hasLinkOnceLinkage() || GV->hasCommonLinkage()))) {
+ // Dynamically-resolved functions need a stub for the function.
+ std::string Name = Mang->getValueName(GV);
+ FnStubs.insert(Name);
+ printSuffixedName(Name, "$stub");
+ if (GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
+ return;
+ }
+ }
+ if (MO.getType() == MachineOperand::MO_ExternalSymbol) {
+ std::string Name(TAI->getGlobalPrefix()); Name += MO.getSymbolName();
+ FnStubs.insert(Name);
+ printSuffixedName(Name, "$stub");
+ return;
+ }
+ }
+
+ printOp(MI->getOperand(OpNo));
+ }
+ void printAbsAddrOperand(const MachineInstr *MI, unsigned OpNo) {
+ O << (int)MI->getOperand(OpNo).getImm()*4;
+ }
+ void printPICLabel(const MachineInstr *MI, unsigned OpNo) {
+ O << "\"L" << getFunctionNumber() << "$pb\"\n";
+ O << "\"L" << getFunctionNumber() << "$pb\":";
+ }
+ void printSymbolHi(const MachineInstr *MI, unsigned OpNo) {
+ if (MI->getOperand(OpNo).isImm()) {
+ printS16ImmOperand(MI, OpNo);
+ } else {
+ if (Subtarget.isDarwin()) O << "ha16(";
+ printOp(MI->getOperand(OpNo));
+ if (TM.getRelocationModel() == Reloc::PIC_)
+ O << "-\"L" << getFunctionNumber() << "$pb\"";
+ if (Subtarget.isDarwin())
+ O << ')';
+ else
+ O << "@ha";
+ }
+ }
+ void printSymbolLo(const MachineInstr *MI, unsigned OpNo) {
+ if (MI->getOperand(OpNo).isImm()) {
+ printS16ImmOperand(MI, OpNo);
+ } else {
+ if (Subtarget.isDarwin()) O << "lo16(";
+ printOp(MI->getOperand(OpNo));
+ if (TM.getRelocationModel() == Reloc::PIC_)
+ O << "-\"L" << getFunctionNumber() << "$pb\"";
+ if (Subtarget.isDarwin())
+ O << ')';
+ else
+ O << "@l";
+ }
+ }
+ void printcrbitm(const MachineInstr *MI, unsigned OpNo) {
+ unsigned CCReg = MI->getOperand(OpNo).getReg();
+ unsigned RegNo = enumRegToMachineReg(CCReg);
+ O << (0x80 >> RegNo);
+ }
+ // The new addressing mode printers.
+ void printMemRegImm(const MachineInstr *MI, unsigned OpNo) {
+ printSymbolLo(MI, OpNo);
+ O << '(';
+ if (MI->getOperand(OpNo+1).isReg() &&
+ MI->getOperand(OpNo+1).getReg() == PPC::R0)
+ O << "0";
+ else
+ printOperand(MI, OpNo+1);
+ O << ')';
+ }
+ void printMemRegImmShifted(const MachineInstr *MI, unsigned OpNo) {
+ if (MI->getOperand(OpNo).isImm())
+ printS16X4ImmOperand(MI, OpNo);
+ else
+ printSymbolLo(MI, OpNo);
+ O << '(';
+ if (MI->getOperand(OpNo+1).isReg() &&
+ MI->getOperand(OpNo+1).getReg() == PPC::R0)
+ O << "0";
+ else
+ printOperand(MI, OpNo+1);
+ O << ')';
+ }
+
+ void printMemRegReg(const MachineInstr *MI, unsigned OpNo) {
+ // When used as the base register, r0 reads constant zero rather than
+ // the value contained in the register. For this reason, the darwin
+ // assembler requires that we print r0 as 0 (no r) when used as the base.
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ printRegister(MO, true);
+ O << ", ";
+ printOperand(MI, OpNo+1);
+ }
+
+ void printPredicateOperand(const MachineInstr *MI, unsigned OpNo,
+ const char *Modifier);
+
+ virtual bool runOnMachineFunction(MachineFunction &F) = 0;
+ virtual bool doFinalization(Module &M) = 0;
+
+ virtual void EmitExternalGlobal(const GlobalVariable *GV);
+ };
+
+ /// PPCLinuxAsmPrinter - PowerPC assembly printer, customized for Linux
+ class VISIBILITY_HIDDEN PPCLinuxAsmPrinter : public PPCAsmPrinter {
+ DwarfWriter *DW;
+ MachineModuleInfo *MMI;
+ public:
+ explicit PPCLinuxAsmPrinter(raw_ostream &O, PPCTargetMachine &TM,
+ const TargetAsmInfo *T, CodeGenOpt::Level OL,
+ bool V)
+ : PPCAsmPrinter(O, TM, T, OL, V), DW(0), MMI(0) {}
+
+ virtual const char *getPassName() const {
+ return "Linux PPC Assembly Printer";
+ }
+
+ bool runOnMachineFunction(MachineFunction &F);
+ bool doInitialization(Module &M);
+ bool doFinalization(Module &M);
+
+ void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ AU.addRequired<MachineModuleInfo>();
+ AU.addRequired<DwarfWriter>();
+ PPCAsmPrinter::getAnalysisUsage(AU);
+ }
+
+ void printModuleLevelGV(const GlobalVariable* GVar);
+ };
+
+ /// PPCDarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac
+ /// OS X
+ class VISIBILITY_HIDDEN PPCDarwinAsmPrinter : public PPCAsmPrinter {
+ DwarfWriter *DW;
+ MachineModuleInfo *MMI;
+ raw_ostream &OS;
+ public:
+ explicit PPCDarwinAsmPrinter(raw_ostream &O, PPCTargetMachine &TM,
+ const TargetAsmInfo *T, CodeGenOpt::Level OL,
+ bool V)
+ : PPCAsmPrinter(O, TM, T, OL, V), DW(0), MMI(0), OS(O) {}
+
+ virtual const char *getPassName() const {
+ return "Darwin PPC Assembly Printer";
+ }
+
+ bool runOnMachineFunction(MachineFunction &F);
+ bool doInitialization(Module &M);
+ bool doFinalization(Module &M);
+
+ void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ AU.addRequired<MachineModuleInfo>();
+ AU.addRequired<DwarfWriter>();
+ PPCAsmPrinter::getAnalysisUsage(AU);
+ }
+
+ void printModuleLevelGV(const GlobalVariable* GVar);
+ };
+} // end of anonymous namespace
+
+// Include the auto-generated portion of the assembly writer
+#include "PPCGenAsmWriter.inc"
+
+void PPCAsmPrinter::printOp(const MachineOperand &MO) {
+ switch (MO.getType()) {
+ case MachineOperand::MO_Immediate:
+ cerr << "printOp() does not handle immediate values\n";
+ abort();
+ return;
+
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMBB());
+ return;
+ case MachineOperand::MO_JumpTableIndex:
+ O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << MO.getIndex();
+ // FIXME: PIC relocation model
+ return;
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
+ << '_' << MO.getIndex();
+ return;
+ case MachineOperand::MO_ExternalSymbol:
+ // Computing the address of an external symbol, not calling it.
+ if (TM.getRelocationModel() != Reloc::Static) {
+ std::string Name(TAI->getGlobalPrefix()); Name += MO.getSymbolName();
+ GVStubs.insert(Name);
+ printSuffixedName(Name, "$non_lazy_ptr");
+ return;
+ }
+ O << TAI->getGlobalPrefix() << MO.getSymbolName();
+ return;
+ case MachineOperand::MO_GlobalAddress: {
+ // Computing the address of a global symbol, not calling it.
+ GlobalValue *GV = MO.getGlobal();
+ std::string Name = Mang->getValueName(GV);
+
+ // External or weakly linked global variables need non-lazily-resolved stubs
+ if (TM.getRelocationModel() != Reloc::Static) {
+ if (GV->isDeclaration() || GV->isWeakForLinker()) {
+ if (GV->hasHiddenVisibility()) {
+ if (!GV->isDeclaration() && !GV->hasCommonLinkage())
+ O << Name;
+ else {
+ HiddenGVStubs.insert(Name);
+ printSuffixedName(Name, "$non_lazy_ptr");
+ }
+ } else {
+ GVStubs.insert(Name);
+ printSuffixedName(Name, "$non_lazy_ptr");
+ }
+ if (GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
+ return;
+ }
+ }
+ O << Name;
+
+ printOffset(MO.getOffset());
+
+ if (GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
+ return;
+ }
+
+ default:
+ O << "<unknown operand type: " << MO.getType() << ">";
+ return;
+ }
+}
+
+/// EmitExternalGlobal - In this case we need to use the indirect symbol.
+///
+void PPCAsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
+ std::string Name;
+ getGlobalLinkName(GV, Name);
+ if (TM.getRelocationModel() != Reloc::Static) {
+ if (GV->hasHiddenVisibility())
+ HiddenGVStubs.insert(Name);
+ else
+ GVStubs.insert(Name);
+ printSuffixedName(Name, "$non_lazy_ptr");
+ return;
+ }
+ O << Name;
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool PPCAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ // Does this asm operand have a single letter operand modifier?
+ if (ExtraCode && ExtraCode[0]) {
+ if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+ switch (ExtraCode[0]) {
+ default: return true; // Unknown modifier.
+ case 'c': // Don't print "$" before a global var name or constant.
+ // PPC never has a prefix.
+ printOperand(MI, OpNo);
+ return false;
+ case 'L': // Write second word of DImode reference.
+ // Verify that this operand has two consecutive registers.
+ if (!MI->getOperand(OpNo).isReg() ||
+ OpNo+1 == MI->getNumOperands() ||
+ !MI->getOperand(OpNo+1).isReg())
+ return true;
+ ++OpNo; // Return the high-part.
+ break;
+ case 'I':
+ // Write 'i' if an integer constant, otherwise nothing. Used to print
+ // addi vs add, etc.
+ if (MI->getOperand(OpNo).isImm())
+ O << "i";
+ return false;
+ }
+ }
+
+ printOperand(MI, OpNo);
+ return false;
+}
+
+bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ if (ExtraCode && ExtraCode[0])
+ return true; // Unknown modifier.
+ if (MI->getOperand(OpNo).isReg())
+ printMemRegReg(MI, OpNo);
+ else
+ printMemRegImm(MI, OpNo);
+ return false;
+}
+
+void PPCAsmPrinter::printPredicateOperand(const MachineInstr *MI, unsigned OpNo,
+ const char *Modifier) {
+ assert(Modifier && "Must specify 'cc' or 'reg' as predicate op modifier!");
+ unsigned Code = MI->getOperand(OpNo).getImm();
+ if (!strcmp(Modifier, "cc")) {
+ switch ((PPC::Predicate)Code) {
+ case PPC::PRED_ALWAYS: return; // Don't print anything for always.
+ case PPC::PRED_LT: O << "lt"; return;
+ case PPC::PRED_LE: O << "le"; return;
+ case PPC::PRED_EQ: O << "eq"; return;
+ case PPC::PRED_GE: O << "ge"; return;
+ case PPC::PRED_GT: O << "gt"; return;
+ case PPC::PRED_NE: O << "ne"; return;
+ case PPC::PRED_UN: O << "un"; return;
+ case PPC::PRED_NU: O << "nu"; return;
+ }
+
+ } else {
+ assert(!strcmp(Modifier, "reg") &&
+ "Need to specify 'cc' or 'reg' as predicate op modifier!");
+ // Don't print the register for 'always'.
+ if (Code == PPC::PRED_ALWAYS) return;
+ printOperand(MI, OpNo+1);
+ }
+}
+
+
+/// printMachineInstruction -- Print out a single PowerPC MI in Darwin syntax to
+/// the current output stream.
+///
+void PPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
+ ++EmittedInsts;
+
+ // Check for slwi/srwi mnemonics.
+ if (MI->getOpcode() == PPC::RLWINM) {
+ bool FoundMnemonic = false;
+ unsigned char SH = MI->getOperand(2).getImm();
+ unsigned char MB = MI->getOperand(3).getImm();
+ unsigned char ME = MI->getOperand(4).getImm();
+ if (SH <= 31 && MB == 0 && ME == (31-SH)) {
+ O << "\tslwi "; FoundMnemonic = true;
+ }
+ if (SH <= 31 && MB == (32-SH) && ME == 31) {
+ O << "\tsrwi "; FoundMnemonic = true;
+ SH = 32-SH;
+ }
+ if (FoundMnemonic) {
+ printOperand(MI, 0);
+ O << ", ";
+ printOperand(MI, 1);
+ O << ", " << (unsigned int)SH << '\n';
+ return;
+ }
+ } else if (MI->getOpcode() == PPC::OR || MI->getOpcode() == PPC::OR8) {
+ if (MI->getOperand(1).getReg() == MI->getOperand(2).getReg()) {
+ O << "\tmr ";
+ printOperand(MI, 0);
+ O << ", ";
+ printOperand(MI, 1);
+ O << '\n';
+ return;
+ }
+ } else if (MI->getOpcode() == PPC::RLDICR) {
+ unsigned char SH = MI->getOperand(2).getImm();
+ unsigned char ME = MI->getOperand(3).getImm();
+ // rldicr RA, RS, SH, 63-SH == sldi RA, RS, SH
+ if (63-SH == ME) {
+ O << "\tsldi ";
+ printOperand(MI, 0);
+ O << ", ";
+ printOperand(MI, 1);
+ O << ", " << (unsigned int)SH << '\n';
+ return;
+ }
+ }
+
+ if (printInstruction(MI))
+ return; // Printer was automatically generated
+
+ assert(0 && "Unhandled instruction in asm writer!");
+ abort();
+ return;
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool PPCLinuxAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ this->MF = &MF;
+
+ SetupMachineFunction(MF);
+ O << "\n\n";
+
+ // Print out constants referenced by the function
+ EmitConstantPool(MF.getConstantPool());
+
+ // Print out labels for the function.
+ const Function *F = MF.getFunction();
+ SwitchToSection(TAI->SectionForGlobal(F));
+
+ switch (F->getLinkage()) {
+ default: assert(0 && "Unknown linkage type!");
+ case Function::PrivateLinkage:
+ case Function::InternalLinkage: // Symbols default to internal.
+ break;
+ case Function::ExternalLinkage:
+ O << "\t.global\t" << CurrentFnName << '\n'
+ << "\t.type\t" << CurrentFnName << ", @function\n";
+ break;
+ case Function::WeakAnyLinkage:
+ case Function::WeakODRLinkage:
+ case Function::LinkOnceAnyLinkage:
+ case Function::LinkOnceODRLinkage:
+ O << "\t.global\t" << CurrentFnName << '\n';
+ O << "\t.weak\t" << CurrentFnName << '\n';
+ break;
+ }
+
+ printVisibility(CurrentFnName, F->getVisibility());
+
+ EmitAlignment(2, F);
+ O << CurrentFnName << ":\n";
+
+ // Emit pre-function debug information.
+ DW->BeginFunction(&MF);
+
+ // Print out code for the function.
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+ // Print a label for the basic block.
+ if (I != MF.begin()) {
+ printBasicBlockLabel(I, true, true);
+ O << '\n';
+ }
+ for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+ II != E; ++II) {
+ // Print the assembly for the instruction.
+ printMachineInstruction(II);
+ }
+ }
+
+ O << "\t.size\t" << CurrentFnName << ",.-" << CurrentFnName << '\n';
+
+ // Print out jump tables referenced by the function.
+ EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
+ SwitchToSection(TAI->SectionForGlobal(F));
+
+ // Emit post-function debug information.
+ DW->EndFunction(&MF);
+
+ O.flush();
+
+ // We didn't modify anything.
+ return false;
+}
+
+bool PPCLinuxAsmPrinter::doInitialization(Module &M) {
+ bool Result = AsmPrinter::doInitialization(M);
+
+ // Emit initial debug information.
+ MMI = getAnalysisIfAvailable<MachineModuleInfo>();
+ assert(MMI);
+ DW = getAnalysisIfAvailable<DwarfWriter>();
+ assert(DW && "DwarfWriter is not available");
+ DW->BeginModule(&M, MMI, O, this, TAI);
+
+ // GNU as handles section names wrapped in quotes
+ Mang->setUseQuotes(true);
+
+ SwitchToSection(TAI->getTextSection());
+
+ return Result;
+}
+
+/// PrintUnmangledNameSafely - Print out the printable characters in the name.
+/// Don't print things like \\n or \\0.
+static void PrintUnmangledNameSafely(const Value *V, raw_ostream &OS) {
+ for (const char *Name = V->getNameStart(), *E = Name+V->getNameLen();
+ Name != E; ++Name)
+ if (isprint(*Name))
+ OS << *Name;
+}
+
+void PPCLinuxAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
+ const TargetData *TD = TM.getTargetData();
+
+ if (!GVar->hasInitializer())
+ return; // External global require no code
+
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (EmitSpecialLLVMGlobal(GVar))
+ return;
+
+ std::string name = Mang->getValueName(GVar);
+
+ printVisibility(name, GVar->getVisibility());
+
+ Constant *C = GVar->getInitializer();
+ const Type *Type = C->getType();
+ unsigned Size = TD->getTypeAllocSize(Type);
+ unsigned Align = TD->getPreferredAlignmentLog(GVar);
+
+ SwitchToSection(TAI->SectionForGlobal(GVar));
+
+ if (C->isNullValue() && /* FIXME: Verify correct */
+ !GVar->hasSection() &&
+ (GVar->hasLocalLinkage() || GVar->hasExternalLinkage() ||
+ GVar->isWeakForLinker())) {
+ if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
+
+ if (GVar->hasExternalLinkage()) {
+ O << "\t.global " << name << '\n';
+ O << "\t.type " << name << ", @object\n";
+ O << name << ":\n";
+ O << "\t.zero " << Size << '\n';
+ } else if (GVar->hasLocalLinkage()) {
+ O << TAI->getLCOMMDirective() << name << ',' << Size;
+ } else {
+ O << ".comm " << name << ',' << Size;
+ }
+ if (VerboseAsm) {
+ O << "\t\t" << TAI->getCommentString() << " '";
+ PrintUnmangledNameSafely(GVar, O);
+ O << "'";
+ }
+ O << '\n';
+ return;
+ }
+
+ switch (GVar->getLinkage()) {
+ case GlobalValue::LinkOnceAnyLinkage:
+ case GlobalValue::LinkOnceODRLinkage:
+ case GlobalValue::WeakAnyLinkage:
+ case GlobalValue::WeakODRLinkage:
+ case GlobalValue::CommonLinkage:
+ O << "\t.global " << name << '\n'
+ << "\t.type " << name << ", @object\n"
+ << "\t.weak " << name << '\n';
+ break;
+ case GlobalValue::AppendingLinkage:
+ // FIXME: appending linkage variables should go into a section of
+ // their name or something. For now, just emit them as external.
+ case GlobalValue::ExternalLinkage:
+ // If external or appending, declare as a global symbol
+ O << "\t.global " << name << '\n'
+ << "\t.type " << name << ", @object\n";
+ // FALL THROUGH
+ case GlobalValue::InternalLinkage:
+ case GlobalValue::PrivateLinkage:
+ break;
+ default:
+ cerr << "Unknown linkage type!";
+ abort();
+ }
+
+ EmitAlignment(Align, GVar);
+ O << name << ":";
+ if (VerboseAsm) {
+ O << "\t\t\t\t" << TAI->getCommentString() << " '";
+ PrintUnmangledNameSafely(GVar, O);
+ O << "'";
+ }
+ O << '\n';
+
+ // If the initializer is a extern weak symbol, remember to emit the weak
+ // reference!
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
+ if (GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
+
+ EmitGlobalConstant(C);
+ O << '\n';
+}
+
+bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
+ // Print out module-level global variables here.
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I)
+ printModuleLevelGV(I);
+
+ // TODO
+
+ // Emit initial debug information.
+ DW->EndModule();
+
+ return AsmPrinter::doFinalization(M);
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool PPCDarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ this->MF = &MF;
+
+ SetupMachineFunction(MF);
+ O << "\n\n";
+
+ // Print out constants referenced by the function
+ EmitConstantPool(MF.getConstantPool());
+
+ // Print out labels for the function.
+ const Function *F = MF.getFunction();
+ SwitchToSection(TAI->SectionForGlobal(F));
+
+ switch (F->getLinkage()) {
+ default: assert(0 && "Unknown linkage type!");
+ case Function::PrivateLinkage:
+ case Function::InternalLinkage: // Symbols default to internal.
+ break;
+ case Function::ExternalLinkage:
+ O << "\t.globl\t" << CurrentFnName << '\n';
+ break;
+ case Function::WeakAnyLinkage:
+ case Function::WeakODRLinkage:
+ case Function::LinkOnceAnyLinkage:
+ case Function::LinkOnceODRLinkage:
+ O << "\t.globl\t" << CurrentFnName << '\n';
+ O << "\t.weak_definition\t" << CurrentFnName << '\n';
+ break;
+ }
+
+ printVisibility(CurrentFnName, F->getVisibility());
+
+ EmitAlignment(F->hasFnAttr(Attribute::OptimizeForSize) ? 2 : 4, F);
+ O << CurrentFnName << ":\n";
+
+ // Emit pre-function debug information.
+ DW->BeginFunction(&MF);
+
+ // If the function is empty, then we need to emit *something*. Otherwise, the
+ // function's label might be associated with something that it wasn't meant to
+ // be associated with. We emit a noop in this situation.
+ MachineFunction::iterator I = MF.begin();
+
+ if (++I == MF.end() && MF.front().empty())
+ O << "\tnop\n";
+
+ // Print out code for the function.
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+ // Print a label for the basic block.
+ if (I != MF.begin()) {
+ printBasicBlockLabel(I, true, true, VerboseAsm);
+ O << '\n';
+ }
+ for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
+ II != IE; ++II) {
+ // Print the assembly for the instruction.
+ printMachineInstruction(II);
+ }
+ }
+
+ // Print out jump tables referenced by the function.
+ EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
+ // Emit post-function debug information.
+ DW->EndFunction(&MF);
+
+ // We didn't modify anything.
+ return false;
+}
+
+
+bool PPCDarwinAsmPrinter::doInitialization(Module &M) {
+ static const char *const CPUDirectives[] = {
+ "",
+ "ppc",
+ "ppc601",
+ "ppc602",
+ "ppc603",
+ "ppc7400",
+ "ppc750",
+ "ppc970",
+ "ppc64"
+ };
+
+ unsigned Directive = Subtarget.getDarwinDirective();
+ if (Subtarget.isGigaProcessor() && Directive < PPC::DIR_970)
+ Directive = PPC::DIR_970;
+ if (Subtarget.hasAltivec() && Directive < PPC::DIR_7400)
+ Directive = PPC::DIR_7400;
+ if (Subtarget.isPPC64() && Directive < PPC::DIR_970)
+ Directive = PPC::DIR_64;
+ assert(Directive <= PPC::DIR_64 && "Directive out of range.");
+ O << "\t.machine " << CPUDirectives[Directive] << '\n';
+
+ bool Result = AsmPrinter::doInitialization(M);
+
+ // Emit initial debug information.
+ // We need this for Personality functions.
+ // AsmPrinter::doInitialization should have done this analysis.
+ MMI = getAnalysisIfAvailable<MachineModuleInfo>();
+ assert(MMI);
+ DW = getAnalysisIfAvailable<DwarfWriter>();
+ assert(DW && "DwarfWriter is not available");
+ DW->BeginModule(&M, MMI, O, this, TAI);
+
+ // Darwin wants symbols to be quoted if they have complex names.
+ Mang->setUseQuotes(true);
+
+ // Prime text sections so they are adjacent. This reduces the likelihood a
+ // large data or debug section causes a branch to exceed 16M limit.
+ SwitchToTextSection("\t.section __TEXT,__textcoal_nt,coalesced,"
+ "pure_instructions");
+ if (TM.getRelocationModel() == Reloc::PIC_) {
+ SwitchToTextSection("\t.section __TEXT,__picsymbolstub1,symbol_stubs,"
+ "pure_instructions,32");
+ } else if (TM.getRelocationModel() == Reloc::DynamicNoPIC) {
+ SwitchToTextSection("\t.section __TEXT,__symbol_stub1,symbol_stubs,"
+ "pure_instructions,16");
+ }
+ SwitchToSection(TAI->getTextSection());
+
+ return Result;
+}
+
+void PPCDarwinAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
+ const TargetData *TD = TM.getTargetData();
+
+ if (!GVar->hasInitializer())
+ return; // External global require no code
+
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (EmitSpecialLLVMGlobal(GVar)) {
+ if (TM.getRelocationModel() == Reloc::Static) {
+ if (GVar->getName() == "llvm.global_ctors")
+ O << ".reference .constructors_used\n";
+ else if (GVar->getName() == "llvm.global_dtors")
+ O << ".reference .destructors_used\n";
+ }
+ return;
+ }
+
+ std::string name = Mang->getValueName(GVar);
+
+ printVisibility(name, GVar->getVisibility());
+
+ Constant *C = GVar->getInitializer();
+ const Type *Type = C->getType();
+ unsigned Size = TD->getTypeAllocSize(Type);
+ unsigned Align = TD->getPreferredAlignmentLog(GVar);
+
+ SwitchToSection(TAI->SectionForGlobal(GVar));
+
+ if (C->isNullValue() && /* FIXME: Verify correct */
+ !GVar->hasSection() &&
+ (GVar->hasLocalLinkage() || GVar->hasExternalLinkage() ||
+ GVar->isWeakForLinker()) &&
+ TAI->SectionKindForGlobal(GVar) != SectionKind::RODataMergeStr) {
+ if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
+
+ if (GVar->hasExternalLinkage()) {
+ O << "\t.globl " << name << '\n';
+ O << "\t.zerofill __DATA, __common, " << name << ", "
+ << Size << ", " << Align;
+ } else if (GVar->hasLocalLinkage()) {
+ O << TAI->getLCOMMDirective() << name << ',' << Size << ',' << Align;
+ } else if (!GVar->hasCommonLinkage()) {
+ O << "\t.globl " << name << '\n'
+ << TAI->getWeakDefDirective() << name << '\n';
+ EmitAlignment(Align, GVar);
+ O << name << ":";
+ if (VerboseAsm) {
+ O << "\t\t\t\t" << TAI->getCommentString() << " ";
+ PrintUnmangledNameSafely(GVar, O);
+ }
+ O << '\n';
+ EmitGlobalConstant(C);
+ return;
+ } else {
+ O << ".comm " << name << ',' << Size;
+ // Darwin 9 and above support aligned common data.
+ if (Subtarget.isDarwin9())
+ O << ',' << Align;
+ }
+ if (VerboseAsm) {
+ O << "\t\t" << TAI->getCommentString() << " '";
+ PrintUnmangledNameSafely(GVar, O);
+ O << "'";
+ }
+ O << '\n';
+ return;
+ }
+
+ switch (GVar->getLinkage()) {
+ case GlobalValue::LinkOnceAnyLinkage:
+ case GlobalValue::LinkOnceODRLinkage:
+ case GlobalValue::WeakAnyLinkage:
+ case GlobalValue::WeakODRLinkage:
+ case GlobalValue::CommonLinkage:
+ O << "\t.globl " << name << '\n'
+ << "\t.weak_definition " << name << '\n';
+ break;
+ case GlobalValue::AppendingLinkage:
+ // FIXME: appending linkage variables should go into a section of
+ // their name or something. For now, just emit them as external.
+ case GlobalValue::ExternalLinkage:
+ // If external or appending, declare as a global symbol
+ O << "\t.globl " << name << '\n';
+ // FALL THROUGH
+ case GlobalValue::InternalLinkage:
+ case GlobalValue::PrivateLinkage:
+ break;
+ default:
+ cerr << "Unknown linkage type!";
+ abort();
+ }
+
+ EmitAlignment(Align, GVar);
+ O << name << ":";
+ if (VerboseAsm) {
+ O << "\t\t\t\t" << TAI->getCommentString() << " '";
+ PrintUnmangledNameSafely(GVar, O);
+ O << "'";
+ }
+ O << '\n';
+
+ // If the initializer is a extern weak symbol, remember to emit the weak
+ // reference!
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
+ if (GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
+
+ EmitGlobalConstant(C);
+ O << '\n';
+}
+
+bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
+ const TargetData *TD = TM.getTargetData();
+
+ // Print out module-level global variables here.
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I)
+ printModuleLevelGV(I);
+
+ bool isPPC64 = TD->getPointerSizeInBits() == 64;
+
+ // Output stubs for dynamically-linked functions
+ if (TM.getRelocationModel() == Reloc::PIC_) {
+ for (StringSet<>::iterator i = FnStubs.begin(), e = FnStubs.end();
+ i != e; ++i) {
+ SwitchToTextSection("\t.section __TEXT,__picsymbolstub1,symbol_stubs,"
+ "pure_instructions,32");
+ EmitAlignment(4);
+ const char *p = i->getKeyData();
+ bool hasQuote = p[0]=='\"';
+ printSuffixedName(p, "$stub");
+ O << ":\n";
+ O << "\t.indirect_symbol " << p << '\n';
+ O << "\tmflr r0\n";
+ O << "\tbcl 20,31,";
+ if (hasQuote)
+ O << "\"L0$" << &p[1];
+ else
+ O << "L0$" << p;
+ O << '\n';
+ if (hasQuote)
+ O << "\"L0$" << &p[1];
+ else
+ O << "L0$" << p;
+ O << ":\n";
+ O << "\tmflr r11\n";
+ O << "\taddis r11,r11,ha16(";
+ printSuffixedName(p, "$lazy_ptr");
+ O << "-";
+ if (hasQuote)
+ O << "\"L0$" << &p[1];
+ else
+ O << "L0$" << p;
+ O << ")\n";
+ O << "\tmtlr r0\n";
+ if (isPPC64)
+ O << "\tldu r12,lo16(";
+ else
+ O << "\tlwzu r12,lo16(";
+ printSuffixedName(p, "$lazy_ptr");
+ O << "-";
+ if (hasQuote)
+ O << "\"L0$" << &p[1];
+ else
+ O << "L0$" << p;
+ O << ")(r11)\n";
+ O << "\tmtctr r12\n";
+ O << "\tbctr\n";
+ SwitchToDataSection(".lazy_symbol_pointer");
+ printSuffixedName(p, "$lazy_ptr");
+ O << ":\n";
+ O << "\t.indirect_symbol " << p << '\n';
+ if (isPPC64)
+ O << "\t.quad dyld_stub_binding_helper\n";
+ else
+ O << "\t.long dyld_stub_binding_helper\n";
+ }
+ } else {
+ for (StringSet<>::iterator i = FnStubs.begin(), e = FnStubs.end();
+ i != e; ++i) {
+ SwitchToTextSection("\t.section __TEXT,__symbol_stub1,symbol_stubs,"
+ "pure_instructions,16");
+ EmitAlignment(4);
+ const char *p = i->getKeyData();
+ printSuffixedName(p, "$stub");
+ O << ":\n";
+ O << "\t.indirect_symbol " << p << '\n';
+ O << "\tlis r11,ha16(";
+ printSuffixedName(p, "$lazy_ptr");
+ O << ")\n";
+ if (isPPC64)
+ O << "\tldu r12,lo16(";
+ else
+ O << "\tlwzu r12,lo16(";
+ printSuffixedName(p, "$lazy_ptr");
+ O << ")(r11)\n";
+ O << "\tmtctr r12\n";
+ O << "\tbctr\n";
+ SwitchToDataSection(".lazy_symbol_pointer");
+ printSuffixedName(p, "$lazy_ptr");
+ O << ":\n";
+ O << "\t.indirect_symbol " << p << '\n';
+ if (isPPC64)
+ O << "\t.quad dyld_stub_binding_helper\n";
+ else
+ O << "\t.long dyld_stub_binding_helper\n";
+ }
+ }
+
+ O << '\n';
+
+ if (TAI->doesSupportExceptionHandling() && MMI) {
+ // Add the (possibly multiple) personalities to the set of global values.
+ // Only referenced functions get into the Personalities list.
+ const std::vector<Function *>& Personalities = MMI->getPersonalities();
+
+ for (std::vector<Function *>::const_iterator I = Personalities.begin(),
+ E = Personalities.end(); I != E; ++I)
+ if (*I) GVStubs.insert("_" + (*I)->getName());
+ }
+
+ // Output stubs for external and common global variables.
+ if (!GVStubs.empty()) {
+ SwitchToDataSection(".non_lazy_symbol_pointer");
+ for (StringSet<>::iterator i = GVStubs.begin(), e = GVStubs.end();
+ i != e; ++i) {
+ std::string p = i->getKeyData();
+ printSuffixedName(p, "$non_lazy_ptr");
+ O << ":\n";
+ O << "\t.indirect_symbol " << p << '\n';
+ if (isPPC64)
+ O << "\t.quad\t0\n";
+ else
+ O << "\t.long\t0\n";
+ }
+ }
+
+ if (!HiddenGVStubs.empty()) {
+ SwitchToSection(TAI->getDataSection());
+ for (StringSet<>::iterator i = HiddenGVStubs.begin(), e = HiddenGVStubs.end();
+ i != e; ++i) {
+ std::string p = i->getKeyData();
+ EmitAlignment(isPPC64 ? 3 : 2);
+ printSuffixedName(p, "$non_lazy_ptr");
+ O << ":\n";
+ if (isPPC64)
+ O << "\t.quad\t";
+ else
+ O << "\t.long\t";
+ O << p << '\n';
+ }
+ }
+
+
+ // Emit initial debug information.
+ DW->EndModule();
+
+ // Funny Darwin hack: This flag tells the linker that no global symbols
+ // contain code that falls through to other global symbols (e.g. the obvious
+ // implementation of multiple entry points). If this doesn't occur, the
+ // linker can safely perform dead code stripping. Since LLVM never generates
+ // code that does this, it is always safe to set.
+ O << "\t.subsections_via_symbols\n";
+
+ return AsmPrinter::doFinalization(M);
+}
+
+
+
+/// createPPCAsmPrinterPass - Returns a pass that prints the PPC assembly code
+/// for a MachineFunction to the given output stream, in a format that the
+/// Darwin assembler can deal with.
+///
+FunctionPass *llvm::createPPCAsmPrinterPass(raw_ostream &o,
+ PPCTargetMachine &tm,
+ CodeGenOpt::Level OptLevel,
+ bool verbose) {
+ const PPCSubtarget *Subtarget = &tm.getSubtarget<PPCSubtarget>();
+
+ if (Subtarget->isDarwin()) {
+ return new PPCDarwinAsmPrinter(o, tm, tm.getTargetAsmInfo(),
+ OptLevel, verbose);
+ } else {
+ return new PPCLinuxAsmPrinter(o, tm, tm.getTargetAsmInfo(),
+ OptLevel, verbose);
+ }
+}
+
+namespace {
+ static struct Register {
+ Register() {
+ PPCTargetMachine::registerAsmPrinter(createPPCAsmPrinterPass);
+ }
+ } Registrator;
+}
+
+extern "C" int PowerPCAsmPrinterForceLink;
+int PowerPCAsmPrinterForceLink = 0;
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