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In the case of EDInstInfo, this would actually cause a bug when -1 became 255 and was then compared >=0 in llvm-mc/Disassembler.cpp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138825 91177308-0d34-0410-b5e6-96231b3b80d8
716 lines
26 KiB
C++
716 lines
26 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 X86 machine code.
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//
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//===----------------------------------------------------------------------===//
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#include "X86AsmPrinter.h"
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#include "InstPrinter/X86ATTInstPrinter.h"
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#include "InstPrinter/X86IntelInstPrinter.h"
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#include "X86MCInstLower.h"
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#include "X86.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/Analysis/DebugInfo.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.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/CodeGen/TargetLoweringObjectFileImpl.h"
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#include "llvm/Target/Mangler.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Support/COFF.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/ADT/SmallString.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Primitive Helper Functions.
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//===----------------------------------------------------------------------===//
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/// runOnMachineFunction - Emit the function body.
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///
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bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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SetupMachineFunction(MF);
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if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho()) {
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bool Intrn = MF.getFunction()->hasInternalLinkage();
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OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
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OutStreamer.EmitCOFFSymbolStorageClass(Intrn ? COFF::IMAGE_SYM_CLASS_STATIC
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: COFF::IMAGE_SYM_CLASS_EXTERNAL);
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OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION
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<< COFF::SCT_COMPLEX_TYPE_SHIFT);
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OutStreamer.EndCOFFSymbolDef();
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}
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// Have common code print out the function header with linkage info etc.
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EmitFunctionHeader();
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// Emit the rest of the function body.
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EmitFunctionBody();
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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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raw_ostream &O) {
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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(), O);
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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 = Mang->getSymbol(GV);
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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, "$non_lazy_ptr");
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MachineModuleInfoImpl::StubValueTy &StubSym =
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MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym);
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if (StubSym.getPointer() == 0)
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StubSym = MachineModuleInfoImpl::
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StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
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} else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){
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MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
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MachineModuleInfoImpl::StubValueTy &StubSym =
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MMI->getObjFileInfo<MachineModuleInfoMachO>().getHiddenGVStubEntry(Sym);
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if (StubSym.getPointer() == 0)
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StubSym = MachineModuleInfoImpl::
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StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
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} else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
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MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$stub");
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MachineModuleInfoImpl::StubValueTy &StubSym =
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MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
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if (StubSym.getPointer() == 0)
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StubSym = MachineModuleInfoImpl::
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StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
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}
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// If the name begins with a dollar-sign, enclose it in parens. We do this
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// to avoid having it look like an integer immediate to the assembler.
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if (GVSym->getName()[0] != '$')
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O << *GVSym;
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else
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O << '(' << *GVSym << ')';
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printOffset(MO.getOffset(), O);
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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("$stub");
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MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str());
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MachineModuleInfoImpl::StubValueTy &StubSym =
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MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
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if (StubSym.getPointer() == 0) {
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TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end());
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StubSym = MachineModuleInfoImpl::
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StubValueTy(OutContext.GetOrCreateSymbol(TempNameStr.str()),
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true);
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}
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SymToPrint = StubSym.getPointer();
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} else {
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SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName());
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}
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// If the name begins with a dollar-sign, enclose it in parens. We do this
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// to avoid having it look like an integer immediate to the assembler.
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if (SymToPrint->getName()[0] != '$')
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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 << " + [.-" << *MF->getPICBaseSymbol() << ']';
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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 << '-' << *MF->getPICBaseSymbol();
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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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case X86II::MO_TLVP: O << "@TLVP"; break;
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case X86II::MO_TLVP_PIC_BASE:
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O << "@TLVP" << '-' << *MF->getPICBaseSymbol();
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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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raw_ostream &O) {
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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_Register:
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// pc-relativeness was handled when computing the value in the reg.
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printOperand(MI, OpNo, O);
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return;
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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 << *MO.getMBB()->getSymbol();
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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, O);
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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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raw_ostream &O, 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, O);
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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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raw_ostream &O) {
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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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raw_ostream &O, 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), O);
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}
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if (Modifier && strcmp(Modifier, "H") == 0)
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O << "+8";
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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, O, Modifier);
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if (IndexReg.getReg()) {
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O << ',';
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printOperand(MI, Op+2, O, 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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raw_ostream &O, const char *Modifier) {
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assert(isMem(MI, Op) && "Invalid memory reference!");
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const MachineOperand &Segment = MI->getOperand(Op+4);
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if (Segment.getReg()) {
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printOperand(MI, Op+4, O, Modifier);
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O << ':';
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}
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printLeaMemReference(MI, Op, O, Modifier);
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}
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void X86AsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op,
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raw_ostream &O) {
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O << *MF->getPICBaseSymbol() << '\n';
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O << *MF->getPICBaseSymbol() << ':';
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}
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bool X86AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode,
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raw_ostream &O) {
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unsigned Reg = MO.getReg();
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switch (Mode) {
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default: return true; // Unknown mode.
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case 'b': // Print QImode register
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Reg = getX86SubSuperRegister(Reg, MVT::i8);
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break;
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case 'h': // Print QImode high register
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Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
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break;
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case 'w': // Print HImode register
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Reg = getX86SubSuperRegister(Reg, MVT::i16);
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break;
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case 'k': // Print SImode register
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Reg = getX86SubSuperRegister(Reg, MVT::i32);
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break;
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case 'q': // Print DImode register
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Reg = getX86SubSuperRegister(Reg, MVT::i64);
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break;
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}
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O << '%' << X86ATTInstPrinter::getRegisterName(Reg);
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return false;
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}
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/// PrintAsmOperand - Print out an operand for an inline asm expression.
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///
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bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
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unsigned AsmVariant,
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const char *ExtraCode, raw_ostream &O) {
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// Does this asm operand have a single letter operand modifier?
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if (ExtraCode && ExtraCode[0]) {
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if (ExtraCode[1] != 0) return true; // Unknown modifier.
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const MachineOperand &MO = MI->getOperand(OpNo);
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switch (ExtraCode[0]) {
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default: return true; // Unknown modifier.
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case 'a': // This is an address. Currently only 'i' and 'r' are expected.
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if (MO.isImm()) {
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O << MO.getImm();
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return false;
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}
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if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) {
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printSymbolOperand(MO, O);
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if (Subtarget->isPICStyleRIPRel())
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O << "(%rip)";
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return false;
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}
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if (MO.isReg()) {
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O << '(';
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printOperand(MI, OpNo, O);
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O << ')';
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return false;
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}
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return true;
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case 'c': // Don't print "$" before a global var name or constant.
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if (MO.isImm())
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O << MO.getImm();
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else if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol())
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printSymbolOperand(MO, O);
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else
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printOperand(MI, OpNo, O);
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return false;
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case 'A': // Print '*' before a register (it must be a register)
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if (MO.isReg()) {
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O << '*';
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printOperand(MI, OpNo, O);
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return false;
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}
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return true;
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case 'b': // Print QImode register
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case 'h': // Print QImode high register
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case 'w': // Print HImode register
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case 'k': // Print SImode register
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case 'q': // Print DImode register
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if (MO.isReg())
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return printAsmMRegister(MO, ExtraCode[0], O);
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printOperand(MI, OpNo, O);
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return false;
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case 'P': // This is the operand of a call, treat specially.
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print_pcrel_imm(MI, OpNo, O);
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return false;
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case 'n': // Negate the immediate or print a '-' before the operand.
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// Note: this is a temporary solution. It should be handled target
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// independently as part of the 'MC' work.
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if (MO.isImm()) {
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O << -MO.getImm();
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return false;
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}
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O << '-';
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}
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}
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printOperand(MI, OpNo, O);
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return false;
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}
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bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
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unsigned OpNo, unsigned AsmVariant,
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const char *ExtraCode,
|
|
raw_ostream &O) {
|
|
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 'H':
|
|
printMemReference(MI, OpNo, O, "H");
|
|
return false;
|
|
case 'P': // Don't print @PLT, but do print as memory.
|
|
printMemReference(MI, OpNo, O, "no-rip");
|
|
return false;
|
|
}
|
|
}
|
|
printMemReference(MI, OpNo, O);
|
|
return false;
|
|
}
|
|
|
|
void X86AsmPrinter::EmitStartOfAsmFile(Module &M) {
|
|
if (Subtarget->isTargetEnvMacho())
|
|
OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
|
|
}
|
|
|
|
|
|
void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
|
|
if (Subtarget->isTargetEnvMacho()) {
|
|
// All darwin targets use mach-o.
|
|
MachineModuleInfoMachO &MMIMacho =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>();
|
|
|
|
// Output stubs for dynamically-linked functions.
|
|
MachineModuleInfoMachO::SymbolListTy Stubs;
|
|
|
|
Stubs = MMIMacho.GetFnStubList();
|
|
if (!Stubs.empty()) {
|
|
const MCSection *TheSection =
|
|
OutContext.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) {
|
|
// L_foo$stub:
|
|
OutStreamer.EmitLabel(Stubs[i].first);
|
|
// .indirect_symbol _foo
|
|
OutStreamer.EmitSymbolAttribute(Stubs[i].second.getPointer(),
|
|
MCSA_IndirectSymbol);
|
|
// hlt; hlt; hlt; hlt; hlt hlt = 0xf4.
|
|
const char HltInsts[] = "\xf4\xf4\xf4\xf4\xf4";
|
|
OutStreamer.EmitBytes(StringRef(HltInsts, 5), 0/*addrspace*/);
|
|
}
|
|
|
|
Stubs.clear();
|
|
OutStreamer.AddBlankLine();
|
|
}
|
|
|
|
// Output stubs for external and common global variables.
|
|
Stubs = MMIMacho.GetGVStubList();
|
|
if (!Stubs.empty()) {
|
|
const MCSection *TheSection =
|
|
OutContext.getMachOSection("__IMPORT", "__pointers",
|
|
MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
|
|
SectionKind::getMetadata());
|
|
OutStreamer.SwitchSection(TheSection);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
// L_foo$non_lazy_ptr:
|
|
OutStreamer.EmitLabel(Stubs[i].first);
|
|
// .indirect_symbol _foo
|
|
MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
|
|
OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),
|
|
MCSA_IndirectSymbol);
|
|
// .long 0
|
|
if (MCSym.getInt())
|
|
// External to current translation unit.
|
|
OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
|
|
else
|
|
// Internal to current translation unit.
|
|
//
|
|
// When we place the LSDA into the TEXT section, the type info
|
|
// pointers need to be indirect and pc-rel. We accomplish this by
|
|
// using NLPs. However, sometimes the types are local to the file. So
|
|
// we need to fill in the value for the NLP in those cases.
|
|
OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
|
|
OutContext),
|
|
4/*size*/, 0/*addrspace*/);
|
|
}
|
|
Stubs.clear();
|
|
OutStreamer.AddBlankLine();
|
|
}
|
|
|
|
Stubs = MMIMacho.GetHiddenGVStubList();
|
|
if (!Stubs.empty()) {
|
|
OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
|
|
EmitAlignment(2);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
// L_foo$non_lazy_ptr:
|
|
OutStreamer.EmitLabel(Stubs[i].first);
|
|
// .long _foo
|
|
OutStreamer.EmitValue(MCSymbolRefExpr::
|
|
Create(Stubs[i].second.getPointer(),
|
|
OutContext),
|
|
4/*size*/, 0/*addrspace*/);
|
|
}
|
|
Stubs.clear();
|
|
OutStreamer.AddBlankLine();
|
|
}
|
|
|
|
// 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->isTargetWindows() && !Subtarget->isTargetCygMing() &&
|
|
MMI->callsExternalVAFunctionWithFloatingPointArguments()) {
|
|
StringRef SymbolName = Subtarget->is64Bit() ? "_fltused" : "__fltused";
|
|
MCSymbol *S = MMI->getContext().GetOrCreateSymbol(SymbolName);
|
|
OutStreamer.EmitSymbolAttribute(S, MCSA_Global);
|
|
}
|
|
|
|
if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho()) {
|
|
X86COFFMachineModuleInfo &COFFMMI =
|
|
MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
|
|
|
|
// Emit type information for external functions
|
|
typedef X86COFFMachineModuleInfo::externals_iterator externals_iterator;
|
|
for (externals_iterator I = COFFMMI.externals_begin(),
|
|
E = COFFMMI.externals_end();
|
|
I != E; ++I) {
|
|
OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
|
|
OutStreamer.EmitCOFFSymbolStorageClass(COFF::IMAGE_SYM_CLASS_EXTERNAL);
|
|
OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION
|
|
<< COFF::SCT_COMPLEX_TYPE_SHIFT);
|
|
OutStreamer.EndCOFFSymbolDef();
|
|
}
|
|
|
|
// Necessary for dllexport support
|
|
std::vector<const MCSymbol*> DLLExportedFns, DLLExportedGlobals;
|
|
|
|
const TargetLoweringObjectFileCOFF &TLOFCOFF =
|
|
static_cast<const TargetLoweringObjectFileCOFF&>(getObjFileLowering());
|
|
|
|
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
|
|
if (I->hasDLLExportLinkage())
|
|
DLLExportedFns.push_back(Mang->getSymbol(I));
|
|
|
|
for (Module::const_global_iterator I = M.global_begin(),
|
|
E = M.global_end(); I != E; ++I)
|
|
if (I->hasDLLExportLinkage())
|
|
DLLExportedGlobals.push_back(Mang->getSymbol(I));
|
|
|
|
// Output linker support code for dllexported globals on windows.
|
|
if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) {
|
|
OutStreamer.SwitchSection(TLOFCOFF.getDrectveSection());
|
|
SmallString<128> name;
|
|
for (unsigned i = 0, e = DLLExportedGlobals.size(); i != e; ++i) {
|
|
if (Subtarget->isTargetWindows())
|
|
name = " /EXPORT:";
|
|
else
|
|
name = " -export:";
|
|
name += DLLExportedGlobals[i]->getName();
|
|
if (Subtarget->isTargetWindows())
|
|
name += ",DATA";
|
|
else
|
|
name += ",data";
|
|
OutStreamer.EmitBytes(name, 0);
|
|
}
|
|
|
|
for (unsigned i = 0, e = DLLExportedFns.size(); i != e; ++i) {
|
|
if (Subtarget->isTargetWindows())
|
|
name = " /EXPORT:";
|
|
else
|
|
name = " -export:";
|
|
name += DLLExportedFns[i]->getName();
|
|
OutStreamer.EmitBytes(name, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Subtarget->isTargetELF()) {
|
|
const TargetLoweringObjectFileELF &TLOFELF =
|
|
static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
|
|
|
|
MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
|
|
|
|
// Output stubs for external and common global variables.
|
|
MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
|
|
if (!Stubs.empty()) {
|
|
OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
|
|
const TargetData *TD = TM.getTargetData();
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
OutStreamer.EmitLabel(Stubs[i].first);
|
|
OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(),
|
|
TD->getPointerSize(), 0);
|
|
}
|
|
Stubs.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
MachineLocation
|
|
X86AsmPrinter::getDebugValueLocation(const MachineInstr *MI) const {
|
|
MachineLocation Location;
|
|
assert (MI->getNumOperands() == 7 && "Invalid no. of machine operands!");
|
|
// Frame address. Currently handles register +- offset only.
|
|
|
|
if (MI->getOperand(0).isReg() && MI->getOperand(3).isImm())
|
|
Location.set(MI->getOperand(0).getReg(), MI->getOperand(3).getImm());
|
|
else {
|
|
DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
|
|
}
|
|
return Location;
|
|
}
|
|
|
|
void X86AsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
|
|
raw_ostream &O) {
|
|
// Only the target-dependent form of DBG_VALUE should get here.
|
|
// Referencing the offset and metadata as NOps-2 and NOps-1 is
|
|
// probably portable to other targets; frame pointer location is not.
|
|
unsigned NOps = MI->getNumOperands();
|
|
assert(NOps==7);
|
|
O << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
|
|
// cast away const; DIetc do not take const operands for some reason.
|
|
DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps-1).getMetadata()));
|
|
if (V.getContext().isSubprogram())
|
|
O << DISubprogram(V.getContext()).getDisplayName() << ":";
|
|
O << V.getName();
|
|
O << " <- ";
|
|
// Frame address. Currently handles register +- offset only.
|
|
O << '[';
|
|
if (MI->getOperand(0).isReg() && MI->getOperand(0).getReg())
|
|
printOperand(MI, 0, O);
|
|
else
|
|
O << "undef";
|
|
O << '+'; printOperand(MI, 3, O);
|
|
O << ']';
|
|
O << "+";
|
|
printOperand(MI, NOps-2, O);
|
|
}
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Target Registry Stuff
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializeX86AsmPrinter() {
|
|
RegisterAsmPrinter<X86AsmPrinter> X(TheX86_32Target);
|
|
RegisterAsmPrinter<X86AsmPrinter> Y(TheX86_64Target);
|
|
}
|