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reimplement getPICLabelString as PrintPICBaseSymbol to eliminate std::string heap thrashing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74105 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -43,20 +43,17 @@ STATISTIC(EmittedInsts, "Number of machine instrs printed");
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static cl::opt<bool> NewAsmPrinter("experimental-asm-printer",
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cl::Hidden);
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static std::string getPICLabelString(unsigned FnNum,
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const TargetAsmInfo *TAI,
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const X86Subtarget* Subtarget) {
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std::string label;
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void X86ATTAsmPrinter::PrintPICBaseSymbol() const {
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if (Subtarget->isTargetDarwin())
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label = "\"L" + utostr_32(FnNum) + "$pb\"";
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O << "\"L" << getFunctionNumber() << "$pb\"";
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else if (Subtarget->isTargetELF())
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label = ".Lllvm$" + utostr_32(FnNum) + "." "$piclabel";
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O << ".Lllvm$" << getFunctionNumber() << "." "$piclabel";
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else
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assert(0 && "Don't know how to print PIC label!\n");
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return label;
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}
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static X86MachineFunctionInfo calculateFunctionInfo(const Function *F,
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const TargetData *TD) {
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X86MachineFunctionInfo Info;
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@ -403,7 +400,7 @@ void X86ATTAsmPrinter::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo) {
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if (shouldPrintPLT(TM, Subtarget)) {
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std::string GOTName(TAI->getGlobalPrefix());
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GOTName+="_GLOBAL_OFFSET_TABLE_";
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if (Name == GOTName)
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if (Name == GOTName) {
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// HACK! Emit extra offset to PC during printing GOT offset to
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// compensate for the size of popl instruction. The resulting code
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// should look like:
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@ -411,8 +408,10 @@ void X86ATTAsmPrinter::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo) {
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// piclabel:
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// popl %some_register
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// addl $_GLOBAL_ADDRESS_TABLE_ + [.-piclabel], %some_register
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O << " + [.-"
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<< getPICLabelString(getFunctionNumber(), TAI, Subtarget) << ']';
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O << " + [.-";
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PrintPICBaseSymbol();
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O << ']';
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}
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O << "@PLT";
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}
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@ -538,8 +537,10 @@ void X86ATTAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
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O << Name;
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}
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if (TM.getRelocationModel() == Reloc::PIC_)
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O << '-' << getPICLabelString(getFunctionNumber(), TAI, Subtarget);
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if (TM.getRelocationModel() == Reloc::PIC_) {
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O << '-';
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PrintPICBaseSymbol();
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}
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} else {
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if (GV->hasDLLImportLinkage())
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O << "__imp_";
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@ -626,7 +627,7 @@ void X86ATTAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
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if (shouldPrintPLT(TM, Subtarget)) {
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std::string GOTName(TAI->getGlobalPrefix());
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GOTName+="_GLOBAL_OFFSET_TABLE_";
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if (Name == GOTName)
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if (Name == GOTName) {
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// HACK! Emit extra offset to PC during printing GOT offset to
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// compensate for the size of popl instruction. The resulting code
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// should look like:
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@ -634,8 +635,10 @@ void X86ATTAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
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// piclabel:
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// popl %some_register
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// addl $_GLOBAL_ADDRESS_TABLE_ + [.-piclabel], %some_register
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O << " + [.-"
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<< getPICLabelString(getFunctionNumber(), TAI, Subtarget) << ']';
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O << " + [.-";
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PrintPICBaseSymbol();
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O << ']';
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}
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}
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if (needCloseParen)
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@ -737,13 +740,19 @@ void X86ATTAsmPrinter::printPICJumpTableSetLabel(unsigned uid,
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if (Subtarget->isPICStyleRIPRel())
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O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
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<< '_' << uid << '\n';
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else
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O << '-' << getPICLabelString(getFunctionNumber(), TAI, Subtarget) << '\n';
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else {
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O << '-';
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PrintPICBaseSymbol();
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O << '\n';
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}
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}
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void X86ATTAsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
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std::string label = getPICLabelString(getFunctionNumber(), TAI, Subtarget);
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O << label << '\n' << label << ':';
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PrintPICBaseSymbol();
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O << '\n';
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PrintPICBaseSymbol();
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O << ':';
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}
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@ -187,6 +187,8 @@ class VISIBILITY_HIDDEN X86ATTAsmPrinter : public AsmPrinter {
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void printPICLabel(const MachineInstr *MI, unsigned Op);
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void printModuleLevelGV(const GlobalVariable* GVar);
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void PrintPICBaseSymbol() const;
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bool runOnMachineFunction(MachineFunction &F);
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void emitFunctionHeader(const MachineFunction &MF);
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