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https://github.com/c64scene-ar/llvm-6502.git
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normal form of .file would fail if the filename had a weird character in it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94437 91177308-0d34-0410-b5e6-96231b3b80d8
789 lines
27 KiB
C++
789 lines
27 KiB
C++
//===-- X86AsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains a printer that converts from our internal representation
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// of machine-dependent LLVM code to AT&T format assembly
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// language. This printer is the output mechanism used by `llc'.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "asm-printer"
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#include "X86AsmPrinter.h"
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#include "X86ATTInstPrinter.h"
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#include "X86IntelInstPrinter.h"
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#include "X86MCInstLower.h"
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#include "X86.h"
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#include "X86COFF.h"
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#include "X86COFFMachineModuleInfo.h"
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#include "X86MachineFunctionInfo.h"
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#include "X86TargetMachine.h"
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#include "llvm/CallingConv.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Module.h"
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#include "llvm/Type.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCSectionMachO.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/CodeGen/MachineJumpTableInfo.h"
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#include "llvm/CodeGen/MachineModuleInfoImpls.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/Target/TargetLoweringObjectFile.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Target/TargetRegistry.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Statistic.h"
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using namespace llvm;
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STATISTIC(EmittedInsts, "Number of machine instrs printed");
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//===----------------------------------------------------------------------===//
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// Primitive Helper Functions.
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//===----------------------------------------------------------------------===//
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void X86AsmPrinter::printMCInst(const MCInst *MI) {
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if (MAI->getAssemblerDialect() == 0)
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X86ATTInstPrinter(O, *MAI).printInstruction(MI);
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else
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X86IntelInstPrinter(O, *MAI).printInstruction(MI);
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}
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void X86AsmPrinter::PrintPICBaseSymbol() const {
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// FIXME: Gross const cast hack.
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X86AsmPrinter *AP = const_cast<X86AsmPrinter*>(this);
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O << *X86MCInstLower(OutContext, 0, *AP).GetPICBaseSymbol();
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}
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void X86AsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
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unsigned FnAlign = MF.getAlignment();
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const Function *F = MF.getFunction();
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if (Subtarget->isTargetCygMing()) {
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X86COFFMachineModuleInfo &COFFMMI =
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MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
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COFFMMI.DecorateCygMingName(CurrentFnSym, OutContext, F,
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*TM.getTargetData());
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}
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OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
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EmitAlignment(FnAlign, F);
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switch (F->getLinkage()) {
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default: llvm_unreachable("Unknown linkage type!");
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case Function::InternalLinkage: // Symbols default to internal.
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case Function::PrivateLinkage:
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break;
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case Function::DLLExportLinkage:
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case Function::ExternalLinkage:
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OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_Global);
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break;
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case Function::LinkerPrivateLinkage:
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case Function::LinkOnceAnyLinkage:
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case Function::LinkOnceODRLinkage:
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case Function::WeakAnyLinkage:
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case Function::WeakODRLinkage:
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if (Subtarget->isTargetDarwin()) {
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OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_Global);
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O << MAI->getWeakDefDirective() << *CurrentFnSym << '\n';
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} else if (Subtarget->isTargetCygMing()) {
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OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_Global);
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// FIXME: linkonce should be a section attribute, handled by COFF Section
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// assignment.
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// http://sourceware.org/binutils/docs-2.20/as/Linkonce.html#Linkonce
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O << "\t.linkonce discard\n";
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} else {
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O << "\t.weak\t" << *CurrentFnSym << '\n';
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}
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break;
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}
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printVisibility(CurrentFnSym, F->getVisibility());
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if (MAI->hasDotTypeDotSizeDirective()) {
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OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction);
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} else if (Subtarget->isTargetCygMing()) {
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O << "\t.def\t " << *CurrentFnSym;
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O << ";\t.scl\t" <<
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(F->hasInternalLinkage() ? COFF::C_STAT : COFF::C_EXT)
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<< ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
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<< ";\t.endef\n";
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}
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O << *CurrentFnSym << ':';
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if (VerboseAsm) {
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O.PadToColumn(MAI->getCommentColumn());
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O << MAI->getCommentString() << ' ';
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WriteAsOperand(O, F, /*PrintType=*/false, F->getParent());
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}
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O << '\n';
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// Add some workaround for linkonce linkage on Cygwin\MinGW
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if (Subtarget->isTargetCygMing() &&
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(F->hasLinkOnceLinkage() || F->hasWeakLinkage()))
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O << "Lllvm$workaround$fake$stub$" << *CurrentFnSym << ":\n";
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}
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/// runOnMachineFunction - This uses the printMachineInstruction()
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/// method to print assembly for each instruction.
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///
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bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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const Function *F = MF.getFunction();
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this->MF = &MF;
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CallingConv::ID CC = F->getCallingConv();
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SetupMachineFunction(MF);
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O << "\n\n";
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if (Subtarget->isTargetCOFF()) {
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X86COFFMachineModuleInfo &COFFMMI =
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MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
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// Populate function information map. Don't want to populate
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// non-stdcall or non-fastcall functions' information right now.
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if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall)
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COFFMMI.AddFunctionInfo(F, *MF.getInfo<X86MachineFunctionInfo>());
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}
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// Print out constants referenced by the function
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EmitConstantPool(MF.getConstantPool());
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// Print the 'header' of function
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emitFunctionHeader(MF);
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// Emit pre-function debug and/or EH information.
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if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
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DW->BeginFunction(&MF);
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// Print out code for the function.
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bool hasAnyRealCode = false;
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for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
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I != E; ++I) {
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// Print a label for the basic block.
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EmitBasicBlockStart(I);
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for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
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II != IE; ++II) {
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// Print the assembly for the instruction.
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if (!II->isLabel())
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hasAnyRealCode = true;
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printMachineInstruction(II);
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}
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}
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if (Subtarget->isTargetDarwin() && !hasAnyRealCode) {
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// If the function is empty, then we need to emit *something*. Otherwise,
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// the function's label might be associated with something that it wasn't
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// meant to be associated with. We emit a noop in this situation.
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// We are assuming inline asms are code.
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O << "\tnop\n";
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}
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if (MAI->hasDotTypeDotSizeDirective())
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O << "\t.size\t" << *CurrentFnSym << ", .-" << *CurrentFnSym << '\n';
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// Emit post-function debug information.
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if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
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DW->EndFunction(&MF);
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// Print out jump tables referenced by the function.
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EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
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// We didn't modify anything.
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return false;
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}
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/// printSymbolOperand - Print a raw symbol reference operand. This handles
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/// jump tables, constant pools, global address and external symbols, all of
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/// which print to a label with various suffixes for relocation types etc.
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void X86AsmPrinter::printSymbolOperand(const MachineOperand &MO) {
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switch (MO.getType()) {
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default: llvm_unreachable("unknown symbol type!");
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case MachineOperand::MO_JumpTableIndex:
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O << *GetJTISymbol(MO.getIndex());
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break;
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case MachineOperand::MO_ConstantPoolIndex:
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O << *GetCPISymbol(MO.getIndex());
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printOffset(MO.getOffset());
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break;
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case MachineOperand::MO_GlobalAddress: {
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const GlobalValue *GV = MO.getGlobal();
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MCSymbol *GVSym;
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if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB)
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GVSym = GetSymbolWithGlobalValueBase(GV, "$stub");
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else if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
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MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE ||
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MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE)
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GVSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
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else
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GVSym = GetGlobalValueSymbol(GV);
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if (Subtarget->isTargetCygMing()) {
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X86COFFMachineModuleInfo &COFFMMI =
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MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
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COFFMMI.DecorateCygMingName(GVSym, OutContext, GV, *TM.getTargetData());
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}
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// Handle dllimport linkage.
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if (MO.getTargetFlags() == X86II::MO_DLLIMPORT)
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GVSym = OutContext.GetOrCreateSymbol(Twine("__imp_") + GVSym->getName());
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if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
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MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) {
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MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
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const MCSymbol *&StubSym =
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MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym);
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if (StubSym == 0)
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StubSym = GetGlobalValueSymbol(GV);
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} else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){
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MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
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const MCSymbol *&StubSym =
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MMI->getObjFileInfo<MachineModuleInfoMachO>().getHiddenGVStubEntry(Sym);
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if (StubSym == 0)
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StubSym = GetGlobalValueSymbol(GV);
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} else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
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MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$stub");
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const MCSymbol *&StubSym =
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MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
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if (StubSym == 0)
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StubSym = GetGlobalValueSymbol(GV);
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}
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// If the name begins with a dollar-sign, enclose it in parens. We do this
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// to avoid having it look like an integer immediate to the assembler.
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if (GVSym->getName()[0] != '$')
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O << *GVSym;
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else
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O << '(' << *GVSym << ')';
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printOffset(MO.getOffset());
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break;
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}
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case MachineOperand::MO_ExternalSymbol: {
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const MCSymbol *SymToPrint;
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if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
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SmallString<128> TempNameStr;
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TempNameStr += StringRef(MO.getSymbolName());
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TempNameStr += StringRef("$stub");
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const MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str());
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const MCSymbol *&StubSym =
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MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
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if (StubSym == 0) {
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TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end());
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StubSym = OutContext.GetOrCreateSymbol(TempNameStr.str());
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}
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SymToPrint = StubSym;
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} else {
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SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName());
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}
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// If the name begins with a dollar-sign, enclose it in parens. We do this
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// to avoid having it look like an integer immediate to the assembler.
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if (SymToPrint->getName()[0] != '$')
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O << *SymToPrint;
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else
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O << '(' << *SymToPrint << '(';
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break;
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}
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}
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switch (MO.getTargetFlags()) {
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default:
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llvm_unreachable("Unknown target flag on GV operand");
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case X86II::MO_NO_FLAG: // No flag.
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break;
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case X86II::MO_DARWIN_NONLAZY:
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case X86II::MO_DLLIMPORT:
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case X86II::MO_DARWIN_STUB:
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// These affect the name of the symbol, not any suffix.
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break;
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case X86II::MO_GOT_ABSOLUTE_ADDRESS:
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O << " + [.-";
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PrintPICBaseSymbol();
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O << ']';
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break;
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case X86II::MO_PIC_BASE_OFFSET:
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case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
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case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
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O << '-';
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PrintPICBaseSymbol();
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break;
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case X86II::MO_TLSGD: O << "@TLSGD"; break;
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case X86II::MO_GOTTPOFF: O << "@GOTTPOFF"; break;
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case X86II::MO_INDNTPOFF: O << "@INDNTPOFF"; break;
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case X86II::MO_TPOFF: O << "@TPOFF"; break;
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case X86II::MO_NTPOFF: O << "@NTPOFF"; break;
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case X86II::MO_GOTPCREL: O << "@GOTPCREL"; break;
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case X86II::MO_GOT: O << "@GOT"; break;
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case X86II::MO_GOTOFF: O << "@GOTOFF"; break;
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case X86II::MO_PLT: O << "@PLT"; break;
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}
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}
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/// print_pcrel_imm - This is used to print an immediate value that ends up
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/// being encoded as a pc-relative value. These print slightly differently, for
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/// example, a $ is not emitted.
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void X86AsmPrinter::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo) {
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const MachineOperand &MO = MI->getOperand(OpNo);
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switch (MO.getType()) {
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default: llvm_unreachable("Unknown pcrel immediate operand");
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case MachineOperand::MO_Immediate:
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O << MO.getImm();
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return;
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case MachineOperand::MO_MachineBasicBlock:
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O << *GetMBBSymbol(MO.getMBB()->getNumber());
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return;
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case MachineOperand::MO_GlobalAddress:
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case MachineOperand::MO_ExternalSymbol:
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printSymbolOperand(MO);
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return;
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}
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}
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void X86AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
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const char *Modifier) {
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const MachineOperand &MO = MI->getOperand(OpNo);
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switch (MO.getType()) {
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default: llvm_unreachable("unknown operand type!");
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case MachineOperand::MO_Register: {
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O << '%';
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unsigned Reg = MO.getReg();
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if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
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EVT VT = (strcmp(Modifier+6,"64") == 0) ?
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MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 :
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((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8));
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Reg = getX86SubSuperRegister(Reg, VT);
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}
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O << X86ATTInstPrinter::getRegisterName(Reg);
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return;
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}
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case MachineOperand::MO_Immediate:
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O << '$' << MO.getImm();
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return;
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case MachineOperand::MO_JumpTableIndex:
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case MachineOperand::MO_ConstantPoolIndex:
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case MachineOperand::MO_GlobalAddress:
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case MachineOperand::MO_ExternalSymbol: {
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O << '$';
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printSymbolOperand(MO);
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break;
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}
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}
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}
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void X86AsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) {
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unsigned char value = MI->getOperand(Op).getImm();
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assert(value <= 7 && "Invalid ssecc argument!");
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switch (value) {
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case 0: O << "eq"; break;
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case 1: O << "lt"; break;
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case 2: O << "le"; break;
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case 3: O << "unord"; break;
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case 4: O << "neq"; break;
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case 5: O << "nlt"; break;
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case 6: O << "nle"; break;
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case 7: O << "ord"; break;
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}
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}
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void X86AsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op,
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const char *Modifier) {
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const MachineOperand &BaseReg = MI->getOperand(Op);
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const MachineOperand &IndexReg = MI->getOperand(Op+2);
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const MachineOperand &DispSpec = MI->getOperand(Op+3);
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// If we really don't want to print out (rip), don't.
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bool HasBaseReg = BaseReg.getReg() != 0;
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if (HasBaseReg && Modifier && !strcmp(Modifier, "no-rip") &&
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BaseReg.getReg() == X86::RIP)
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HasBaseReg = false;
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// HasParenPart - True if we will print out the () part of the mem ref.
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bool HasParenPart = IndexReg.getReg() || HasBaseReg;
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if (DispSpec.isImm()) {
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int DispVal = DispSpec.getImm();
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if (DispVal || !HasParenPart)
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O << DispVal;
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} else {
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assert(DispSpec.isGlobal() || DispSpec.isCPI() ||
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DispSpec.isJTI() || DispSpec.isSymbol());
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printSymbolOperand(MI->getOperand(Op+3));
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}
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if (HasParenPart) {
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assert(IndexReg.getReg() != X86::ESP &&
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"X86 doesn't allow scaling by ESP");
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O << '(';
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if (HasBaseReg)
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printOperand(MI, Op, Modifier);
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if (IndexReg.getReg()) {
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O << ',';
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printOperand(MI, Op+2, Modifier);
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unsigned ScaleVal = MI->getOperand(Op+1).getImm();
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if (ScaleVal != 1)
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O << ',' << ScaleVal;
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}
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O << ')';
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}
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}
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void X86AsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
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|
const char *Modifier) {
|
|
assert(isMem(MI, Op) && "Invalid memory reference!");
|
|
const MachineOperand &Segment = MI->getOperand(Op+4);
|
|
if (Segment.getReg()) {
|
|
printOperand(MI, Op+4, Modifier);
|
|
O << ':';
|
|
}
|
|
printLeaMemReference(MI, Op, Modifier);
|
|
}
|
|
|
|
void X86AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
|
|
const MachineBasicBlock *MBB) const {
|
|
if (!MAI->getSetDirective())
|
|
return;
|
|
|
|
// We don't need .set machinery if we have GOT-style relocations
|
|
if (Subtarget->isPICStyleGOT())
|
|
return;
|
|
|
|
O << MAI->getSetDirective() << ' ' << MAI->getPrivateGlobalPrefix()
|
|
<< getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
|
|
|
|
O << *GetMBBSymbol(MBB->getNumber());
|
|
|
|
if (Subtarget->isPICStyleRIPRel())
|
|
O << '-' << *GetJTISymbol(uid) << '\n';
|
|
else {
|
|
O << '-';
|
|
PrintPICBaseSymbol();
|
|
O << '\n';
|
|
}
|
|
}
|
|
|
|
|
|
void X86AsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
|
|
PrintPICBaseSymbol();
|
|
O << '\n';
|
|
PrintPICBaseSymbol();
|
|
O << ':';
|
|
}
|
|
|
|
void X86AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
|
|
const MachineBasicBlock *MBB,
|
|
unsigned uid) const {
|
|
const char *JTEntryDirective = MJTI->getEntrySize() == 4 ?
|
|
MAI->getData32bitsDirective() : MAI->getData64bitsDirective();
|
|
|
|
O << JTEntryDirective << ' ';
|
|
|
|
if (Subtarget->isPICStyleRIPRel() || Subtarget->isPICStyleStubPIC()) {
|
|
O << MAI->getPrivateGlobalPrefix() << getFunctionNumber()
|
|
<< '_' << uid << "_set_" << MBB->getNumber();
|
|
} else if (Subtarget->isPICStyleGOT())
|
|
O << *GetMBBSymbol(MBB->getNumber()) << "@GOTOFF";
|
|
else
|
|
O << *GetMBBSymbol(MBB->getNumber());
|
|
}
|
|
|
|
bool X86AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode) {
|
|
unsigned Reg = MO.getReg();
|
|
switch (Mode) {
|
|
default: return true; // Unknown mode.
|
|
case 'b': // Print QImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i8);
|
|
break;
|
|
case 'h': // Print QImode high register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
|
|
break;
|
|
case 'w': // Print HImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i16);
|
|
break;
|
|
case 'k': // Print SImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i32);
|
|
break;
|
|
case 'q': // Print DImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i64);
|
|
break;
|
|
}
|
|
|
|
O << '%' << X86ATTInstPrinter::getRegisterName(Reg);
|
|
return false;
|
|
}
|
|
|
|
/// PrintAsmOperand - Print out an operand for an inline asm expression.
|
|
///
|
|
bool X86AsmPrinter::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.
|
|
|
|
const MachineOperand &MO = MI->getOperand(OpNo);
|
|
|
|
switch (ExtraCode[0]) {
|
|
default: return true; // Unknown modifier.
|
|
case 'a': // This is an address. Currently only 'i' and 'r' are expected.
|
|
if (MO.isImm()) {
|
|
O << MO.getImm();
|
|
return false;
|
|
}
|
|
if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) {
|
|
printSymbolOperand(MO);
|
|
return false;
|
|
}
|
|
if (MO.isReg()) {
|
|
O << '(';
|
|
printOperand(MI, OpNo);
|
|
O << ')';
|
|
return false;
|
|
}
|
|
return true;
|
|
|
|
case 'c': // Don't print "$" before a global var name or constant.
|
|
if (MO.isImm())
|
|
O << MO.getImm();
|
|
else if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol())
|
|
printSymbolOperand(MO);
|
|
else
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
|
|
case 'A': // Print '*' before a register (it must be a register)
|
|
if (MO.isReg()) {
|
|
O << '*';
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
}
|
|
return true;
|
|
|
|
case 'b': // Print QImode register
|
|
case 'h': // Print QImode high register
|
|
case 'w': // Print HImode register
|
|
case 'k': // Print SImode register
|
|
case 'q': // Print DImode register
|
|
if (MO.isReg())
|
|
return printAsmMRegister(MO, ExtraCode[0]);
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
|
|
case 'P': // This is the operand of a call, treat specially.
|
|
print_pcrel_imm(MI, OpNo);
|
|
return false;
|
|
|
|
case 'n': // Negate the immediate or print a '-' before the operand.
|
|
// Note: this is a temporary solution. It should be handled target
|
|
// independently as part of the 'MC' work.
|
|
if (MO.isImm()) {
|
|
O << -MO.getImm();
|
|
return false;
|
|
}
|
|
O << '-';
|
|
}
|
|
}
|
|
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
}
|
|
|
|
bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
|
|
unsigned OpNo, unsigned AsmVariant,
|
|
const char *ExtraCode) {
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
if (ExtraCode[1] != 0) return true; // Unknown modifier.
|
|
|
|
switch (ExtraCode[0]) {
|
|
default: return true; // Unknown modifier.
|
|
case 'b': // Print QImode register
|
|
case 'h': // Print QImode high register
|
|
case 'w': // Print HImode register
|
|
case 'k': // Print SImode register
|
|
case 'q': // Print SImode register
|
|
// These only apply to registers, ignore on mem.
|
|
break;
|
|
case 'P': // Don't print @PLT, but do print as memory.
|
|
printMemReference(MI, OpNo, "no-rip");
|
|
return false;
|
|
}
|
|
}
|
|
printMemReference(MI, OpNo);
|
|
return false;
|
|
}
|
|
|
|
|
|
|
|
/// printMachineInstruction -- Print out a single X86 LLVM instruction MI in
|
|
/// AT&T syntax to the current output stream.
|
|
///
|
|
void X86AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
|
|
++EmittedInsts;
|
|
|
|
processDebugLoc(MI, true);
|
|
|
|
printInstructionThroughMCStreamer(MI);
|
|
|
|
if (VerboseAsm)
|
|
EmitComments(*MI);
|
|
O << '\n';
|
|
|
|
processDebugLoc(MI, false);
|
|
}
|
|
|
|
void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
|
|
if (Subtarget->isTargetDarwin()) {
|
|
// All darwin targets use mach-o.
|
|
TargetLoweringObjectFileMachO &TLOFMacho =
|
|
static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
|
|
|
|
MachineModuleInfoMachO &MMIMacho =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>();
|
|
|
|
// Output stubs for dynamically-linked functions.
|
|
MachineModuleInfoMachO::SymbolListTy Stubs;
|
|
|
|
Stubs = MMIMacho.GetFnStubList();
|
|
if (!Stubs.empty()) {
|
|
const MCSection *TheSection =
|
|
TLOFMacho.getMachOSection("__IMPORT", "__jump_table",
|
|
MCSectionMachO::S_SYMBOL_STUBS |
|
|
MCSectionMachO::S_ATTR_SELF_MODIFYING_CODE |
|
|
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
|
|
5, SectionKind::getMetadata());
|
|
OutStreamer.SwitchSection(TheSection);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
O << *Stubs[i].first << ":\n";
|
|
// Get the MCSymbol without the $stub suffix.
|
|
O << "\t.indirect_symbol " << *Stubs[i].second;
|
|
O << "\n\thlt ; hlt ; hlt ; hlt ; hlt\n";
|
|
}
|
|
O << '\n';
|
|
|
|
Stubs.clear();
|
|
}
|
|
|
|
// Output stubs for external and common global variables.
|
|
Stubs = MMIMacho.GetGVStubList();
|
|
if (!Stubs.empty()) {
|
|
const MCSection *TheSection =
|
|
TLOFMacho.getMachOSection("__IMPORT", "__pointers",
|
|
MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
|
|
SectionKind::getMetadata());
|
|
OutStreamer.SwitchSection(TheSection);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
O << *Stubs[i].first << ":\n\t.indirect_symbol " << *Stubs[i].second;
|
|
O << "\n\t.long\t0\n";
|
|
}
|
|
Stubs.clear();
|
|
}
|
|
|
|
Stubs = MMIMacho.GetHiddenGVStubList();
|
|
if (!Stubs.empty()) {
|
|
OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
|
|
EmitAlignment(2);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
O << *Stubs[i].first << ":\n" << MAI->getData32bitsDirective();
|
|
O << *Stubs[i].second << '\n';
|
|
}
|
|
Stubs.clear();
|
|
}
|
|
|
|
// 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.
|
|
OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
|
|
}
|
|
|
|
if (Subtarget->isTargetCOFF()) {
|
|
X86COFFMachineModuleInfo &COFFMMI =
|
|
MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
|
|
|
|
// Emit type information for external functions
|
|
for (X86COFFMachineModuleInfo::stub_iterator I = COFFMMI.stub_begin(),
|
|
E = COFFMMI.stub_end(); I != E; ++I) {
|
|
O << "\t.def\t " << I->getKeyData()
|
|
<< ";\t.scl\t" << COFF::C_EXT
|
|
<< ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
|
|
<< ";\t.endef\n";
|
|
}
|
|
|
|
if (Subtarget->isTargetCygMing()) {
|
|
// Necessary for dllexport support
|
|
std::vector<const MCSymbol*> DLLExportedFns, DLLExportedGlobals;
|
|
|
|
TargetLoweringObjectFileCOFF &TLOFCOFF =
|
|
static_cast<TargetLoweringObjectFileCOFF&>(getObjFileLowering());
|
|
|
|
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
|
|
if (I->hasDLLExportLinkage()) {
|
|
MCSymbol *Sym = GetGlobalValueSymbol(I);
|
|
COFFMMI.DecorateCygMingName(Sym, OutContext, I, *TM.getTargetData());
|
|
DLLExportedFns.push_back(Sym);
|
|
}
|
|
|
|
for (Module::const_global_iterator I = M.global_begin(),
|
|
E = M.global_end(); I != E; ++I)
|
|
if (I->hasDLLExportLinkage())
|
|
DLLExportedGlobals.push_back(GetGlobalValueSymbol(I));
|
|
|
|
// Output linker support code for dllexported globals on windows.
|
|
if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) {
|
|
OutStreamer.SwitchSection(TLOFCOFF.getCOFFSection(".section .drectve",
|
|
true,
|
|
SectionKind::getMetadata()));
|
|
for (unsigned i = 0, e = DLLExportedGlobals.size(); i != e; ++i)
|
|
O << "\t.ascii \" -export:" << *DLLExportedGlobals[i] << ",data\"\n";
|
|
|
|
for (unsigned i = 0, e = DLLExportedFns.size(); i != e; ++i)
|
|
O << "\t.ascii \" -export:" << *DLLExportedFns[i] << "\"\n";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Target Registry Stuff
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static MCInstPrinter *createX86MCInstPrinter(const Target &T,
|
|
unsigned SyntaxVariant,
|
|
const MCAsmInfo &MAI,
|
|
raw_ostream &O) {
|
|
if (SyntaxVariant == 0)
|
|
return new X86ATTInstPrinter(O, MAI);
|
|
if (SyntaxVariant == 1)
|
|
return new X86IntelInstPrinter(O, MAI);
|
|
return 0;
|
|
}
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializeX86AsmPrinter() {
|
|
RegisterAsmPrinter<X86AsmPrinter> X(TheX86_32Target);
|
|
RegisterAsmPrinter<X86AsmPrinter> Y(TheX86_64Target);
|
|
|
|
TargetRegistry::RegisterMCInstPrinter(TheX86_32Target,createX86MCInstPrinter);
|
|
TargetRegistry::RegisterMCInstPrinter(TheX86_64Target,createX86MCInstPrinter);
|
|
}
|