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-rw-r--r--contrib/llvm/lib/Target/X86/X86AsmPrinter.cpp706
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diff --git a/contrib/llvm/lib/Target/X86/X86AsmPrinter.cpp b/contrib/llvm/lib/Target/X86/X86AsmPrinter.cpp
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+++ b/contrib/llvm/lib/Target/X86/X86AsmPrinter.cpp
@@ -0,0 +1,706 @@
+//===-- X86AsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly --------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to X86 machine code.
+//
+//===----------------------------------------------------------------------===//
+
+#include "X86AsmPrinter.h"
+#include "InstPrinter/X86ATTInstPrinter.h"
+#include "MCTargetDesc/X86BaseInfo.h"
+#include "X86InstrInfo.h"
+#include "X86MachineFunctionInfo.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/CodeGen/MachineValueType.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/IR/DebugInfo.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Type.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/COFF.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/TargetRegistry.h"
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// Primitive Helper Functions.
+//===----------------------------------------------------------------------===//
+
+/// runOnMachineFunction - Emit the function body.
+///
+bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ Subtarget = &MF.getSubtarget<X86Subtarget>();
+
+ SMShadowTracker.startFunction(MF);
+
+ SetupMachineFunction(MF);
+
+ if (Subtarget->isTargetCOFF()) {
+ bool Intrn = MF.getFunction()->hasInternalLinkage();
+ OutStreamer->BeginCOFFSymbolDef(CurrentFnSym);
+ OutStreamer->EmitCOFFSymbolStorageClass(Intrn ? COFF::IMAGE_SYM_CLASS_STATIC
+ : COFF::IMAGE_SYM_CLASS_EXTERNAL);
+ OutStreamer->EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION
+ << COFF::SCT_COMPLEX_TYPE_SHIFT);
+ OutStreamer->EndCOFFSymbolDef();
+ }
+
+ // Emit the rest of the function body.
+ EmitFunctionBody();
+
+ // We didn't modify anything.
+ return false;
+}
+
+/// printSymbolOperand - Print a raw symbol reference operand. This handles
+/// jump tables, constant pools, global address and external symbols, all of
+/// which print to a label with various suffixes for relocation types etc.
+static void printSymbolOperand(X86AsmPrinter &P, const MachineOperand &MO,
+ raw_ostream &O) {
+ switch (MO.getType()) {
+ default: llvm_unreachable("unknown symbol type!");
+ case MachineOperand::MO_ConstantPoolIndex:
+ P.GetCPISymbol(MO.getIndex())->print(O, P.MAI);
+ P.printOffset(MO.getOffset(), O);
+ break;
+ case MachineOperand::MO_GlobalAddress: {
+ const GlobalValue *GV = MO.getGlobal();
+
+ MCSymbol *GVSym;
+ if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB)
+ GVSym = P.getSymbolWithGlobalValueBase(GV, "$stub");
+ else if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
+ MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE ||
+ MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE)
+ GVSym = P.getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
+ else
+ GVSym = P.getSymbol(GV);
+
+ // Handle dllimport linkage.
+ if (MO.getTargetFlags() == X86II::MO_DLLIMPORT)
+ GVSym =
+ P.OutContext.getOrCreateSymbol(Twine("__imp_") + GVSym->getName());
+
+ if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
+ MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) {
+ MCSymbol *Sym = P.getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ P.MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym);
+ if (!StubSym.getPointer())
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(P.getSymbol(GV), !GV->hasInternalLinkage());
+ } else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){
+ MCSymbol *Sym = P.getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ P.MMI->getObjFileInfo<MachineModuleInfoMachO>().getHiddenGVStubEntry(
+ Sym);
+ if (!StubSym.getPointer())
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(P.getSymbol(GV), !GV->hasInternalLinkage());
+ } else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
+ MCSymbol *Sym = P.getSymbolWithGlobalValueBase(GV, "$stub");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ P.MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
+ if (!StubSym.getPointer())
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(P.getSymbol(GV), !GV->hasInternalLinkage());
+ }
+
+ // If the name begins with a dollar-sign, enclose it in parens. We do this
+ // to avoid having it look like an integer immediate to the assembler.
+ if (GVSym->getName()[0] != '$')
+ GVSym->print(O, P.MAI);
+ else {
+ O << '(';
+ GVSym->print(O, P.MAI);
+ O << ')';
+ }
+ P.printOffset(MO.getOffset(), O);
+ break;
+ }
+ }
+
+ switch (MO.getTargetFlags()) {
+ default:
+ llvm_unreachable("Unknown target flag on GV operand");
+ case X86II::MO_NO_FLAG: // No flag.
+ break;
+ case X86II::MO_DARWIN_NONLAZY:
+ case X86II::MO_DLLIMPORT:
+ case X86II::MO_DARWIN_STUB:
+ // These affect the name of the symbol, not any suffix.
+ break;
+ case X86II::MO_GOT_ABSOLUTE_ADDRESS:
+ O << " + [.-";
+ P.MF->getPICBaseSymbol()->print(O, P.MAI);
+ O << ']';
+ break;
+ case X86II::MO_PIC_BASE_OFFSET:
+ case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
+ case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
+ O << '-';
+ P.MF->getPICBaseSymbol()->print(O, P.MAI);
+ break;
+ case X86II::MO_TLSGD: O << "@TLSGD"; break;
+ case X86II::MO_TLSLD: O << "@TLSLD"; break;
+ case X86II::MO_TLSLDM: O << "@TLSLDM"; break;
+ case X86II::MO_GOTTPOFF: O << "@GOTTPOFF"; break;
+ case X86II::MO_INDNTPOFF: O << "@INDNTPOFF"; break;
+ case X86II::MO_TPOFF: O << "@TPOFF"; break;
+ case X86II::MO_DTPOFF: O << "@DTPOFF"; break;
+ case X86II::MO_NTPOFF: O << "@NTPOFF"; break;
+ case X86II::MO_GOTNTPOFF: O << "@GOTNTPOFF"; break;
+ case X86II::MO_GOTPCREL: O << "@GOTPCREL"; break;
+ case X86II::MO_GOT: O << "@GOT"; break;
+ case X86II::MO_GOTOFF: O << "@GOTOFF"; break;
+ case X86II::MO_PLT: O << "@PLT"; break;
+ case X86II::MO_TLVP: O << "@TLVP"; break;
+ case X86II::MO_TLVP_PIC_BASE:
+ O << "@TLVP" << '-';
+ P.MF->getPICBaseSymbol()->print(O, P.MAI);
+ break;
+ case X86II::MO_SECREL: O << "@SECREL32"; break;
+ }
+}
+
+static void printOperand(X86AsmPrinter &P, const MachineInstr *MI,
+ unsigned OpNo, raw_ostream &O,
+ const char *Modifier = nullptr, unsigned AsmVariant = 0);
+
+/// printPCRelImm - This is used to print an immediate value that ends up
+/// being encoded as a pc-relative value. These print slightly differently, for
+/// example, a $ is not emitted.
+static void printPCRelImm(X86AsmPrinter &P, const MachineInstr *MI,
+ unsigned OpNo, raw_ostream &O) {
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ switch (MO.getType()) {
+ default: llvm_unreachable("Unknown pcrel immediate operand");
+ case MachineOperand::MO_Register:
+ // pc-relativeness was handled when computing the value in the reg.
+ printOperand(P, MI, OpNo, O);
+ return;
+ case MachineOperand::MO_Immediate:
+ O << MO.getImm();
+ return;
+ case MachineOperand::MO_GlobalAddress:
+ printSymbolOperand(P, MO, O);
+ return;
+ }
+}
+
+static void printOperand(X86AsmPrinter &P, const MachineInstr *MI,
+ unsigned OpNo, raw_ostream &O, const char *Modifier,
+ unsigned AsmVariant) {
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ switch (MO.getType()) {
+ default: llvm_unreachable("unknown operand type!");
+ case MachineOperand::MO_Register: {
+ // FIXME: Enumerating AsmVariant, so we can remove magic number.
+ if (AsmVariant == 0) O << '%';
+ unsigned Reg = MO.getReg();
+ if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
+ unsigned Size = (strcmp(Modifier+6,"64") == 0) ? 64 :
+ (strcmp(Modifier+6,"32") == 0) ? 32 :
+ (strcmp(Modifier+6,"16") == 0) ? 16 : 8;
+ Reg = getX86SubSuperRegister(Reg, Size);
+ }
+ O << X86ATTInstPrinter::getRegisterName(Reg);
+ return;
+ }
+
+ case MachineOperand::MO_Immediate:
+ if (AsmVariant == 0) O << '$';
+ O << MO.getImm();
+ return;
+
+ case MachineOperand::MO_GlobalAddress: {
+ if (AsmVariant == 0) O << '$';
+ printSymbolOperand(P, MO, O);
+ break;
+ }
+ }
+}
+
+static void printLeaMemReference(X86AsmPrinter &P, const MachineInstr *MI,
+ unsigned Op, raw_ostream &O,
+ const char *Modifier = nullptr) {
+ const MachineOperand &BaseReg = MI->getOperand(Op+X86::AddrBaseReg);
+ const MachineOperand &IndexReg = MI->getOperand(Op+X86::AddrIndexReg);
+ const MachineOperand &DispSpec = MI->getOperand(Op+X86::AddrDisp);
+
+ // If we really don't want to print out (rip), don't.
+ bool HasBaseReg = BaseReg.getReg() != 0;
+ if (HasBaseReg && Modifier && !strcmp(Modifier, "no-rip") &&
+ BaseReg.getReg() == X86::RIP)
+ HasBaseReg = false;
+
+ // HasParenPart - True if we will print out the () part of the mem ref.
+ bool HasParenPart = IndexReg.getReg() || HasBaseReg;
+
+ switch (DispSpec.getType()) {
+ default:
+ llvm_unreachable("unknown operand type!");
+ case MachineOperand::MO_Immediate: {
+ int DispVal = DispSpec.getImm();
+ if (DispVal || !HasParenPart)
+ O << DispVal;
+ break;
+ }
+ case MachineOperand::MO_GlobalAddress:
+ case MachineOperand::MO_ConstantPoolIndex:
+ printSymbolOperand(P, DispSpec, O);
+ }
+
+ if (Modifier && strcmp(Modifier, "H") == 0)
+ O << "+8";
+
+ if (HasParenPart) {
+ assert(IndexReg.getReg() != X86::ESP &&
+ "X86 doesn't allow scaling by ESP");
+
+ O << '(';
+ if (HasBaseReg)
+ printOperand(P, MI, Op+X86::AddrBaseReg, O, Modifier);
+
+ if (IndexReg.getReg()) {
+ O << ',';
+ printOperand(P, MI, Op+X86::AddrIndexReg, O, Modifier);
+ unsigned ScaleVal = MI->getOperand(Op+X86::AddrScaleAmt).getImm();
+ if (ScaleVal != 1)
+ O << ',' << ScaleVal;
+ }
+ O << ')';
+ }
+}
+
+static void printMemReference(X86AsmPrinter &P, const MachineInstr *MI,
+ unsigned Op, raw_ostream &O,
+ const char *Modifier = nullptr) {
+ assert(isMem(MI, Op) && "Invalid memory reference!");
+ const MachineOperand &Segment = MI->getOperand(Op+X86::AddrSegmentReg);
+ if (Segment.getReg()) {
+ printOperand(P, MI, Op+X86::AddrSegmentReg, O, Modifier);
+ O << ':';
+ }
+ printLeaMemReference(P, MI, Op, O, Modifier);
+}
+
+static void printIntelMemReference(X86AsmPrinter &P, const MachineInstr *MI,
+ unsigned Op, raw_ostream &O,
+ const char *Modifier = nullptr,
+ unsigned AsmVariant = 1) {
+ const MachineOperand &BaseReg = MI->getOperand(Op+X86::AddrBaseReg);
+ unsigned ScaleVal = MI->getOperand(Op+X86::AddrScaleAmt).getImm();
+ const MachineOperand &IndexReg = MI->getOperand(Op+X86::AddrIndexReg);
+ const MachineOperand &DispSpec = MI->getOperand(Op+X86::AddrDisp);
+ const MachineOperand &SegReg = MI->getOperand(Op+X86::AddrSegmentReg);
+
+ // If this has a segment register, print it.
+ if (SegReg.getReg()) {
+ printOperand(P, MI, Op+X86::AddrSegmentReg, O, Modifier, AsmVariant);
+ O << ':';
+ }
+
+ O << '[';
+
+ bool NeedPlus = false;
+ if (BaseReg.getReg()) {
+ printOperand(P, MI, Op+X86::AddrBaseReg, O, Modifier, AsmVariant);
+ NeedPlus = true;
+ }
+
+ if (IndexReg.getReg()) {
+ if (NeedPlus) O << " + ";
+ if (ScaleVal != 1)
+ O << ScaleVal << '*';
+ printOperand(P, MI, Op+X86::AddrIndexReg, O, Modifier, AsmVariant);
+ NeedPlus = true;
+ }
+
+ if (!DispSpec.isImm()) {
+ if (NeedPlus) O << " + ";
+ printOperand(P, MI, Op+X86::AddrDisp, O, Modifier, AsmVariant);
+ } else {
+ int64_t DispVal = DispSpec.getImm();
+ if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg())) {
+ if (NeedPlus) {
+ if (DispVal > 0)
+ O << " + ";
+ else {
+ O << " - ";
+ DispVal = -DispVal;
+ }
+ }
+ O << DispVal;
+ }
+ }
+ O << ']';
+}
+
+static bool printAsmMRegister(X86AsmPrinter &P, const MachineOperand &MO,
+ char Mode, raw_ostream &O) {
+ unsigned Reg = MO.getReg();
+ switch (Mode) {
+ default: return true; // Unknown mode.
+ case 'b': // Print QImode register
+ Reg = getX86SubSuperRegister(Reg, 8);
+ break;
+ case 'h': // Print QImode high register
+ Reg = getX86SubSuperRegister(Reg, 8, true);
+ break;
+ case 'w': // Print HImode register
+ Reg = getX86SubSuperRegister(Reg, 16);
+ break;
+ case 'k': // Print SImode register
+ Reg = getX86SubSuperRegister(Reg, 32);
+ break;
+ case 'q':
+ // Print 64-bit register names if 64-bit integer registers are available.
+ // Otherwise, print 32-bit register names.
+ Reg = getX86SubSuperRegister(Reg, P.getSubtarget().is64Bit() ? 64 : 32);
+ 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, raw_ostream &O) {
+ // 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:
+ // See if this is a generic print operand
+ return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
+ case 'a': // This is an address. Currently only 'i' and 'r' are expected.
+ switch (MO.getType()) {
+ default:
+ return true;
+ case MachineOperand::MO_Immediate:
+ O << MO.getImm();
+ return false;
+ case MachineOperand::MO_ConstantPoolIndex:
+ case MachineOperand::MO_JumpTableIndex:
+ case MachineOperand::MO_ExternalSymbol:
+ llvm_unreachable("unexpected operand type!");
+ case MachineOperand::MO_GlobalAddress:
+ printSymbolOperand(*this, MO, O);
+ if (Subtarget->isPICStyleRIPRel())
+ O << "(%rip)";
+ return false;
+ case MachineOperand::MO_Register:
+ O << '(';
+ printOperand(*this, MI, OpNo, O);
+ O << ')';
+ return false;
+ }
+
+ case 'c': // Don't print "$" before a global var name or constant.
+ switch (MO.getType()) {
+ default:
+ printOperand(*this, MI, OpNo, O);
+ break;
+ case MachineOperand::MO_Immediate:
+ O << MO.getImm();
+ break;
+ case MachineOperand::MO_ConstantPoolIndex:
+ case MachineOperand::MO_JumpTableIndex:
+ case MachineOperand::MO_ExternalSymbol:
+ llvm_unreachable("unexpected operand type!");
+ case MachineOperand::MO_GlobalAddress:
+ printSymbolOperand(*this, MO, O);
+ break;
+ }
+ return false;
+
+ case 'A': // Print '*' before a register (it must be a register)
+ if (MO.isReg()) {
+ O << '*';
+ printOperand(*this, MI, OpNo, O);
+ 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(*this, MO, ExtraCode[0], O);
+ printOperand(*this, MI, OpNo, O);
+ return false;
+
+ case 'P': // This is the operand of a call, treat specially.
+ printPCRelImm(*this, MI, OpNo, O);
+ 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(*this, MI, OpNo, O, /*Modifier*/ nullptr, AsmVariant);
+ return false;
+}
+
+bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo, unsigned AsmVariant,
+ const char *ExtraCode,
+ raw_ostream &O) {
+ if (AsmVariant) {
+ printIntelMemReference(*this, MI, OpNo, O);
+ return false;
+ }
+
+ 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(*this, MI, OpNo, O, "H");
+ return false;
+ case 'P': // Don't print @PLT, but do print as memory.
+ printMemReference(*this, MI, OpNo, O, "no-rip");
+ return false;
+ }
+ }
+ printMemReference(*this, MI, OpNo, O);
+ return false;
+}
+
+void X86AsmPrinter::EmitStartOfAsmFile(Module &M) {
+ const Triple &TT = TM.getTargetTriple();
+
+ if (TT.isOSBinFormatMachO())
+ OutStreamer->SwitchSection(getObjFileLowering().getTextSection());
+
+ if (TT.isOSBinFormatCOFF()) {
+ // Emit an absolute @feat.00 symbol. This appears to be some kind of
+ // compiler features bitfield read by link.exe.
+ if (TT.getArch() == Triple::x86) {
+ MCSymbol *S = MMI->getContext().getOrCreateSymbol(StringRef("@feat.00"));
+ OutStreamer->BeginCOFFSymbolDef(S);
+ OutStreamer->EmitCOFFSymbolStorageClass(COFF::IMAGE_SYM_CLASS_STATIC);
+ OutStreamer->EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_NULL);
+ OutStreamer->EndCOFFSymbolDef();
+ // According to the PE-COFF spec, the LSB of this value marks the object
+ // for "registered SEH". This means that all SEH handler entry points
+ // must be registered in .sxdata. Use of any unregistered handlers will
+ // cause the process to terminate immediately. LLVM does not know how to
+ // register any SEH handlers, so its object files should be safe.
+ OutStreamer->EmitSymbolAttribute(S, MCSA_Global);
+ OutStreamer->EmitAssignment(
+ S, MCConstantExpr::create(int64_t(1), MMI->getContext()));
+ }
+ }
+ OutStreamer->EmitSyntaxDirective();
+}
+
+static void
+emitNonLazySymbolPointer(MCStreamer &OutStreamer, MCSymbol *StubLabel,
+ MachineModuleInfoImpl::StubValueTy &MCSym) {
+ // L_foo$stub:
+ OutStreamer.EmitLabel(StubLabel);
+ // .indirect_symbol _foo
+ OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol);
+
+ if (MCSym.getInt())
+ // External to current translation unit.
+ OutStreamer.EmitIntValue(0, 4/*size*/);
+ 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.
+ // We need to fill in the value for the NLP in those cases.
+ OutStreamer.EmitValue(
+ MCSymbolRefExpr::create(MCSym.getPointer(), OutStreamer.getContext()),
+ 4 /*size*/);
+}
+
+MCSymbol *X86AsmPrinter::GetCPISymbol(unsigned CPID) const {
+ if (Subtarget->isTargetKnownWindowsMSVC()) {
+ const MachineConstantPoolEntry &CPE =
+ MF->getConstantPool()->getConstants()[CPID];
+ if (!CPE.isMachineConstantPoolEntry()) {
+ const DataLayout &DL = MF->getDataLayout();
+ SectionKind Kind = CPE.getSectionKind(&DL);
+ const Constant *C = CPE.Val.ConstVal;
+ if (const MCSectionCOFF *S = dyn_cast<MCSectionCOFF>(
+ getObjFileLowering().getSectionForConstant(DL, Kind, C))) {
+ if (MCSymbol *Sym = S->getCOMDATSymbol()) {
+ if (Sym->isUndefined())
+ OutStreamer->EmitSymbolAttribute(Sym, MCSA_Global);
+ return Sym;
+ }
+ }
+ }
+ }
+
+ return AsmPrinter::GetCPISymbol(CPID);
+}
+
+void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
+ const Triple &TT = TM.getTargetTriple();
+
+ if (TT.isOSBinFormatMachO()) {
+ // 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()) {
+ MCSection *TheSection = OutContext.getMachOSection(
+ "__IMPORT", "__jump_table",
+ MachO::S_SYMBOL_STUBS | MachO::S_ATTR_SELF_MODIFYING_CODE |
+ MachO::S_ATTR_PURE_INSTRUCTIONS,
+ 5, SectionKind::getMetadata());
+ OutStreamer->SwitchSection(TheSection);
+
+ for (const auto &Stub : Stubs) {
+ // L_foo$stub:
+ OutStreamer->EmitLabel(Stub.first);
+ // .indirect_symbol _foo
+ OutStreamer->EmitSymbolAttribute(Stub.second.getPointer(),
+ MCSA_IndirectSymbol);
+ // hlt; hlt; hlt; hlt; hlt hlt = 0xf4.
+ const char HltInsts[] = "\xf4\xf4\xf4\xf4\xf4";
+ OutStreamer->EmitBytes(StringRef(HltInsts, 5));
+ }
+
+ Stubs.clear();
+ OutStreamer->AddBlankLine();
+ }
+
+ // Output stubs for external and common global variables.
+ Stubs = MMIMacho.GetGVStubList();
+ if (!Stubs.empty()) {
+ MCSection *TheSection = OutContext.getMachOSection(
+ "__IMPORT", "__pointers", MachO::S_NON_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+ OutStreamer->SwitchSection(TheSection);
+
+ for (auto &Stub : Stubs)
+ emitNonLazySymbolPointer(*OutStreamer, Stub.first, Stub.second);
+
+ Stubs.clear();
+ OutStreamer->AddBlankLine();
+ }
+
+ Stubs = MMIMacho.GetHiddenGVStubList();
+ if (!Stubs.empty()) {
+ MCSection *TheSection = OutContext.getMachOSection(
+ "__IMPORT", "__pointers", MachO::S_NON_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+ OutStreamer->SwitchSection(TheSection);
+
+ for (auto &Stub : Stubs)
+ emitNonLazySymbolPointer(*OutStreamer, Stub.first, Stub.second);
+
+ Stubs.clear();
+ OutStreamer->AddBlankLine();
+ }
+
+ SM.serializeToStackMapSection();
+ FM.serializeToFaultMapSection();
+
+ // 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 (TT.isKnownWindowsMSVCEnvironment() && MMI->usesVAFloatArgument()) {
+ StringRef SymbolName =
+ (TT.getArch() == Triple::x86_64) ? "_fltused" : "__fltused";
+ MCSymbol *S = MMI->getContext().getOrCreateSymbol(SymbolName);
+ OutStreamer->EmitSymbolAttribute(S, MCSA_Global);
+ }
+
+ if (TT.isOSBinFormatCOFF()) {
+ const TargetLoweringObjectFileCOFF &TLOFCOFF =
+ static_cast<const TargetLoweringObjectFileCOFF&>(getObjFileLowering());
+
+ std::string Flags;
+ raw_string_ostream FlagsOS(Flags);
+
+ for (const auto &Function : M)
+ TLOFCOFF.emitLinkerFlagsForGlobal(FlagsOS, &Function, *Mang);
+ for (const auto &Global : M.globals())
+ TLOFCOFF.emitLinkerFlagsForGlobal(FlagsOS, &Global, *Mang);
+ for (const auto &Alias : M.aliases())
+ TLOFCOFF.emitLinkerFlagsForGlobal(FlagsOS, &Alias, *Mang);
+
+ FlagsOS.flush();
+
+ // Output collected flags.
+ if (!Flags.empty()) {
+ OutStreamer->SwitchSection(TLOFCOFF.getDrectveSection());
+ OutStreamer->EmitBytes(Flags);
+ }
+
+ SM.serializeToStackMapSection();
+ }
+
+ if (TT.isOSBinFormatELF()) {
+ SM.serializeToStackMapSection();
+ FM.serializeToFaultMapSection();
+ }
+}
+
+//===----------------------------------------------------------------------===//
+// Target Registry Stuff
+//===----------------------------------------------------------------------===//
+
+// Force static initialization.
+extern "C" void LLVMInitializeX86AsmPrinter() {
+ RegisterAsmPrinter<X86AsmPrinter> X(TheX86_32Target);
+ RegisterAsmPrinter<X86AsmPrinter> Y(TheX86_64Target);
+}
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