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-rw-r--r--lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp374
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diff --git a/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp b/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp
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+++ b/lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp
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+//===-- XCoreAsmPrinter.cpp - XCore LLVM assembly writer ------------------===//
+//
+// 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 the XAS-format XCore assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "XCore.h"
+#include "XCoreInstrInfo.h"
+#include "XCoreSubtarget.h"
+#include "XCoreMCAsmInfo.h"
+#include "XCoreTargetMachine.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MathExtras.h"
+#include <algorithm>
+#include <cctype>
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+static cl::opt<unsigned> MaxThreads("xcore-max-threads", cl::Optional,
+ cl::desc("Maximum number of threads (for emulation thread-local storage)"),
+ cl::Hidden,
+ cl::value_desc("number"),
+ cl::init(8));
+
+namespace {
+ class VISIBILITY_HIDDEN XCoreAsmPrinter : public AsmPrinter {
+ const XCoreSubtarget &Subtarget;
+ public:
+ explicit XCoreAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
+ const MCAsmInfo *T, bool V)
+ : AsmPrinter(O, TM, T, V),
+ Subtarget(TM.getSubtarget<XCoreSubtarget>()) {}
+
+ virtual const char *getPassName() const {
+ return "XCore Assembly Printer";
+ }
+
+ void printMemOperand(const MachineInstr *MI, int opNum);
+ void printOperand(const MachineInstr *MI, int opNum);
+ bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode);
+
+ void emitGlobalDirective(const std::string &name);
+ void emitExternDirective(const std::string &name);
+
+ void emitArrayBound(const std::string &name, const GlobalVariable *GV);
+ virtual void PrintGlobalVariable(const GlobalVariable *GV);
+
+ void emitFunctionStart(MachineFunction &MF);
+ void emitFunctionEnd(MachineFunction &MF);
+
+ void printInstruction(const MachineInstr *MI); // autogenerated.
+ static const char *getRegisterName(unsigned RegNo);
+
+ void printMachineInstruction(const MachineInstr *MI);
+ bool runOnMachineFunction(MachineFunction &F);
+
+ void getAnalysisUsage(AnalysisUsage &AU) const {
+ AsmPrinter::getAnalysisUsage(AU);
+ AU.setPreservesAll();
+ AU.addRequired<MachineModuleInfo>();
+ AU.addRequired<DwarfWriter>();
+ }
+ };
+} // end of anonymous namespace
+
+#include "XCoreGenAsmWriter.inc"
+
+void XCoreAsmPrinter::
+emitGlobalDirective(const std::string &name)
+{
+ O << MAI->getGlobalDirective() << name;
+ O << "\n";
+}
+
+void XCoreAsmPrinter::
+emitExternDirective(const std::string &name)
+{
+ O << "\t.extern\t" << name;
+ O << '\n';
+}
+
+void XCoreAsmPrinter::
+emitArrayBound(const std::string &name, const GlobalVariable *GV)
+{
+ assert(((GV->hasExternalLinkage() ||
+ GV->hasWeakLinkage()) ||
+ GV->hasLinkOnceLinkage()) && "Unexpected linkage");
+ if (const ArrayType *ATy = dyn_cast<ArrayType>(
+ cast<PointerType>(GV->getType())->getElementType()))
+ {
+ O << MAI->getGlobalDirective() << name << ".globound" << "\n";
+ O << MAI->getSetDirective() << name << ".globound" << ","
+ << ATy->getNumElements() << "\n";
+ if (GV->hasWeakLinkage() || GV->hasLinkOnceLinkage()) {
+ // TODO Use COMDAT groups for LinkOnceLinkage
+ O << MAI->getWeakDefDirective() << name << ".globound" << "\n";
+ }
+ }
+}
+
+void XCoreAsmPrinter::PrintGlobalVariable(const GlobalVariable *GV) {
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (!GV->hasInitializer() ||
+ EmitSpecialLLVMGlobal(GV))
+ return;
+
+ const TargetData *TD = TM.getTargetData();
+
+ OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(GV, Mang,TM));
+
+ std::string name = Mang->getMangledName(GV);
+ Constant *C = GV->getInitializer();
+ unsigned Align = (unsigned)TD->getPreferredTypeAlignmentShift(C->getType());
+
+ // Mark the start of the global
+ O << "\t.cc_top " << name << ".data," << name << "\n";
+
+ switch (GV->getLinkage()) {
+ case GlobalValue::AppendingLinkage:
+ llvm_report_error("AppendingLinkage is not supported by this target!");
+ case GlobalValue::LinkOnceAnyLinkage:
+ case GlobalValue::LinkOnceODRLinkage:
+ case GlobalValue::WeakAnyLinkage:
+ case GlobalValue::WeakODRLinkage:
+ case GlobalValue::ExternalLinkage:
+ emitArrayBound(name, GV);
+ emitGlobalDirective(name);
+ // TODO Use COMDAT groups for LinkOnceLinkage
+ if (GV->hasWeakLinkage() || GV->hasLinkOnceLinkage()) {
+ O << MAI->getWeakDefDirective() << name << "\n";
+ }
+ // FALL THROUGH
+ case GlobalValue::InternalLinkage:
+ case GlobalValue::PrivateLinkage:
+ case GlobalValue::LinkerPrivateLinkage:
+ break;
+ case GlobalValue::GhostLinkage:
+ llvm_unreachable("Should not have any unmaterialized functions!");
+ case GlobalValue::DLLImportLinkage:
+ llvm_unreachable("DLLImport linkage is not supported by this target!");
+ case GlobalValue::DLLExportLinkage:
+ llvm_unreachable("DLLExport linkage is not supported by this target!");
+ default:
+ llvm_unreachable("Unknown linkage type!");
+ }
+
+ EmitAlignment(Align, GV, 2);
+
+ unsigned Size = TD->getTypeAllocSize(C->getType());
+ if (GV->isThreadLocal()) {
+ Size *= MaxThreads;
+ }
+ if (MAI->hasDotTypeDotSizeDirective()) {
+ O << "\t.type " << name << ",@object\n";
+ O << "\t.size " << name << "," << Size << "\n";
+ }
+ O << name << ":\n";
+
+ EmitGlobalConstant(C);
+ if (GV->isThreadLocal()) {
+ for (unsigned i = 1; i < MaxThreads; ++i) {
+ EmitGlobalConstant(C);
+ }
+ }
+ if (Size < 4) {
+ // The ABI requires that unsigned scalar types smaller than 32 bits
+ // are are padded to 32 bits.
+ EmitZeros(4 - Size);
+ }
+
+ // Mark the end of the global
+ O << "\t.cc_bottom " << name << ".data\n";
+}
+
+/// Emit the directives on the start of functions
+void XCoreAsmPrinter::emitFunctionStart(MachineFunction &MF) {
+ // Print out the label for the function.
+ const Function *F = MF.getFunction();
+
+ OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
+
+ // Mark the start of the function
+ O << "\t.cc_top " << CurrentFnName << ".function," << CurrentFnName << "\n";
+
+ switch (F->getLinkage()) {
+ default: llvm_unreachable("Unknown linkage type!");
+ case Function::InternalLinkage: // Symbols default to internal.
+ case Function::PrivateLinkage:
+ case Function::LinkerPrivateLinkage:
+ break;
+ case Function::ExternalLinkage:
+ emitGlobalDirective(CurrentFnName);
+ break;
+ case Function::LinkOnceAnyLinkage:
+ case Function::LinkOnceODRLinkage:
+ case Function::WeakAnyLinkage:
+ case Function::WeakODRLinkage:
+ // TODO Use COMDAT groups for LinkOnceLinkage
+ O << MAI->getGlobalDirective() << CurrentFnName << "\n";
+ O << MAI->getWeakDefDirective() << CurrentFnName << "\n";
+ break;
+ }
+ // (1 << 1) byte aligned
+ EmitAlignment(MF.getAlignment(), F, 1);
+ if (MAI->hasDotTypeDotSizeDirective()) {
+ O << "\t.type " << CurrentFnName << ",@function\n";
+ }
+ O << CurrentFnName << ":\n";
+}
+
+/// Emit the directives on the end of functions
+void XCoreAsmPrinter::
+emitFunctionEnd(MachineFunction &MF)
+{
+ // Mark the end of the function
+ O << "\t.cc_bottom " << CurrentFnName << ".function\n";
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool XCoreAsmPrinter::runOnMachineFunction(MachineFunction &MF)
+{
+ this->MF = &MF;
+
+ SetupMachineFunction(MF);
+
+ // Print out constants referenced by the function
+ EmitConstantPool(MF.getConstantPool());
+
+ // Print out jump tables referenced by the function
+ EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
+ // Emit the function start directives
+ emitFunctionStart(MF);
+
+ // 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()) {
+ EmitBasicBlockStart(I);
+ }
+
+ for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+ II != E; ++II) {
+ // Print the assembly for the instruction.
+ printMachineInstruction(II);
+ }
+
+ // Each Basic Block is separated by a newline
+ O << '\n';
+ }
+
+ // Emit function end directives
+ emitFunctionEnd(MF);
+
+ // Emit post-function debug information.
+ DW->EndFunction(&MF);
+
+ // We didn't modify anything.
+ return false;
+}
+
+void XCoreAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum)
+{
+ printOperand(MI, opNum);
+
+ if (MI->getOperand(opNum+1).isImm()
+ && MI->getOperand(opNum+1).getImm() == 0)
+ return;
+
+ O << "+";
+ printOperand(MI, opNum+1);
+}
+
+void XCoreAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
+ const MachineOperand &MO = MI->getOperand(opNum);
+ switch (MO.getType()) {
+ case MachineOperand::MO_Register:
+ O << getRegisterName(MO.getReg());
+ break;
+ case MachineOperand::MO_Immediate:
+ O << MO.getImm();
+ break;
+ case MachineOperand::MO_MachineBasicBlock:
+ GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
+ break;
+ case MachineOperand::MO_GlobalAddress:
+ O << Mang->getMangledName(MO.getGlobal());
+ break;
+ case MachineOperand::MO_ExternalSymbol:
+ O << MO.getSymbolName();
+ break;
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
+ << '_' << MO.getIndex();
+ break;
+ case MachineOperand::MO_JumpTableIndex:
+ O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << MO.getIndex();
+ break;
+ default:
+ llvm_unreachable("not implemented");
+ }
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool XCoreAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ printOperand(MI, OpNo);
+ return false;
+}
+
+void XCoreAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
+ ++EmittedInsts;
+
+ processDebugLoc(MI, true);
+
+ // Check for mov mnemonic
+ unsigned src, dst, srcSR, dstSR;
+ if (TM.getInstrInfo()->isMoveInstr(*MI, src, dst, srcSR, dstSR)) {
+ O << "\tmov " << getRegisterName(dst) << ", ";
+ O << getRegisterName(src) << '\n';
+ return;
+ }
+ printInstruction(MI);
+ if (VerboseAsm && !MI->getDebugLoc().isUnknown())
+ EmitComments(*MI);
+ O << '\n';
+
+ processDebugLoc(MI, false);
+}
+
+// Force static initialization.
+extern "C" void LLVMInitializeXCoreAsmPrinter() {
+ RegisterAsmPrinter<XCoreAsmPrinter> X(TheXCoreTarget);
+}
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