-//===-- X86AsmPrinter.cpp - Convert X86 LLVM IR to X86 assembly -----------===//
+//===-- X86AsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly --------===//
//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
-// This file the shared super class printer that converts from our internal
-// representation of machine-dependent LLVM code to Intel and AT&T format
-// assembly language.
-// This printer is the output mechanism used by `llc'.
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to X86 machine code.
//
//===----------------------------------------------------------------------===//
#include "X86AsmPrinter.h"
-#include "X86ATTAsmPrinter.h"
-#include "X86COFF.h"
-#include "X86IntelAsmPrinter.h"
+#include "X86MCInstLower.h"
+#include "X86.h"
+#include "X86COFFMachineModuleInfo.h"
#include "X86MachineFunctionInfo.h"
-#include "X86Subtarget.h"
-#include "llvm/ADT/StringExtras.h"
+#include "X86TargetMachine.h"
+#include "InstPrinter/X86ATTInstPrinter.h"
#include "llvm/CallingConv.h"
-#include "llvm/Constants.h"
+#include "llvm/DebugInfo.h"
+#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/Assembly/Writer.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetOptions.h"
+#include "llvm/Support/COFF.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/ADT/SmallString.h"
using namespace llvm;
-static X86FunctionInfo calculateFunctionInfo(const Function *F,
- const TargetData *TD) {
- X86FunctionInfo Info;
- uint64_t Size = 0;
-
- switch (F->getCallingConv()) {
- case CallingConv::X86_StdCall:
- Info.setDecorationStyle(StdCall);
+//===----------------------------------------------------------------------===//
+// Primitive Helper Functions.
+//===----------------------------------------------------------------------===//
+
+/// runOnMachineFunction - Emit the function body.
+///
+bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ SetupMachineFunction(MF);
+
+ if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho()) {
+ 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();
+ }
+
+ // Have common code print out the function header with linkage info etc.
+ EmitFunctionHeader();
+
+ // 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.
+void X86AsmPrinter::printSymbolOperand(const MachineOperand &MO,
+ raw_ostream &O) {
+ switch (MO.getType()) {
+ default: llvm_unreachable("unknown symbol type!");
+ case MachineOperand::MO_JumpTableIndex:
+ O << *GetJTISymbol(MO.getIndex());
break;
- case CallingConv::X86_FastCall:
- Info.setDecorationStyle(FastCall);
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << *GetCPISymbol(MO.getIndex());
+ printOffset(MO.getOffset(), O);
+ break;
+ case MachineOperand::MO_GlobalAddress: {
+ const GlobalValue *GV = MO.getGlobal();
+
+ MCSymbol *GVSym;
+ if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB)
+ GVSym = GetSymbolWithGlobalValueBase(GV, "$stub");
+ else if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
+ MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE ||
+ MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE)
+ GVSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
+ else
+ GVSym = Mang->getSymbol(GV);
+
+ // Handle dllimport linkage.
+ if (MO.getTargetFlags() == X86II::MO_DLLIMPORT)
+ GVSym = OutContext.GetOrCreateSymbol(Twine("__imp_") + GVSym->getName());
+
+ if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
+ MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) {
+ MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym);
+ if (StubSym.getPointer() == 0)
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
+ } else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){
+ MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getHiddenGVStubEntry(Sym);
+ if (StubSym.getPointer() == 0)
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
+ } else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
+ MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$stub");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
+ if (StubSym.getPointer() == 0)
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
+ }
+
+ // If the name begins with a dollar-sign, enclose it in parens. We do this
+ // to avoid having it look like an integer immediate to the assembler.
+ if (GVSym->getName()[0] != '$')
+ O << *GVSym;
+ else
+ O << '(' << *GVSym << ')';
+ printOffset(MO.getOffset(), O);
break;
- default:
- return Info;
}
+ case MachineOperand::MO_ExternalSymbol: {
+ const MCSymbol *SymToPrint;
+ if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
+ SmallString<128> TempNameStr;
+ TempNameStr += StringRef(MO.getSymbolName());
+ TempNameStr += StringRef("$stub");
- for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
- AI != AE; ++AI)
- Size += TD->getTypeSize(AI->getType());
+ MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str());
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
+ if (StubSym.getPointer() == 0) {
+ TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end());
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(OutContext.GetOrCreateSymbol(TempNameStr.str()),
+ true);
+ }
+ SymToPrint = StubSym.getPointer();
+ } else {
+ SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName());
+ }
- // Size should be aligned to DWORD boundary
- Size = ((Size + 3)/4)*4;
-
- // We're not supporting tooooo huge arguments :)
- Info.setBytesToPopOnReturn((unsigned int)Size);
- return Info;
+ // If the name begins with a dollar-sign, enclose it in parens. We do this
+ // to avoid having it look like an integer immediate to the assembler.
+ if (SymToPrint->getName()[0] != '$')
+ O << *SymToPrint;
+ else
+ O << '(' << *SymToPrint << '(';
+ 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 << " + [.-" << *MF->getPICBaseSymbol() << ']';
+ break;
+ case X86II::MO_PIC_BASE_OFFSET:
+ case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
+ case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
+ O << '-' << *MF->getPICBaseSymbol();
+ 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" << '-' << *MF->getPICBaseSymbol();
+ break;
+ case X86II::MO_SECREL: O << "@SECREL"; break;
+ }
}
+/// 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.
+void X86AsmPrinter::printPCRelImm(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(MI, OpNo, O);
+ return;
+ case MachineOperand::MO_Immediate:
+ O << MO.getImm();
+ return;
+ case MachineOperand::MO_MachineBasicBlock:
+ O << *MO.getMBB()->getSymbol();
+ return;
+ case MachineOperand::MO_GlobalAddress:
+ case MachineOperand::MO_ExternalSymbol:
+ printSymbolOperand(MO, O);
+ return;
+ }
+}
-/// decorateName - Query FunctionInfoMap and use this information for various
-/// name decoration.
-void X86SharedAsmPrinter::decorateName(std::string &Name,
- const GlobalValue *GV) {
- const Function *F = dyn_cast<Function>(GV);
- if (!F) return;
- // We don't want to decorate non-stdcall or non-fastcall functions right now
- unsigned CC = F->getCallingConv();
- if (CC != CallingConv::X86_StdCall && CC != CallingConv::X86_FastCall)
+void X86AsmPrinter::printOperand(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) {
+ MVT::SimpleValueType VT = (strcmp(Modifier+6,"64") == 0) ?
+ MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 :
+ ((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8));
+ Reg = getX86SubSuperRegister(Reg, VT);
+ }
+ O << X86ATTInstPrinter::getRegisterName(Reg);
return;
-
- FMFInfoMap::const_iterator info_item = FunctionInfoMap.find(F);
-
- const X86FunctionInfo *Info;
- if (info_item == FunctionInfoMap.end()) {
- // Calculate apropriate function info and populate map
- FunctionInfoMap[F] = calculateFunctionInfo(F, TM.getTargetData());
- Info = &FunctionInfoMap[F];
- } else {
- Info = &info_item->second;
}
-
- switch (Info->getDecorationStyle()) {
- case None:
- break;
- case StdCall:
- if (!F->isVarArg()) // Variadic functions do not receive @0 suffix.
- Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
- break;
- case FastCall:
- if (!F->isVarArg()) // Variadic functions do not receive @0 suffix.
- Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
- if (Name[0] == '_') {
- Name[0] = '@';
- } else {
- Name = '@' + Name;
- }
+ case MachineOperand::MO_Immediate:
+ O << '$' << MO.getImm();
+ return;
+
+ case MachineOperand::MO_JumpTableIndex:
+ case MachineOperand::MO_ConstantPoolIndex:
+ case MachineOperand::MO_GlobalAddress:
+ case MachineOperand::MO_ExternalSymbol: {
+ O << '$';
+ printSymbolOperand(MO, O);
break;
- default:
- assert(0 && "Unsupported DecorationStyle");
+ }
}
}
-/// doInitialization
-bool X86SharedAsmPrinter::doInitialization(Module &M) {
- if (Subtarget->isTargetELF() ||
- Subtarget->isTargetCygMing() ||
- Subtarget->isTargetDarwin()) {
- // Emit initial debug information.
- DW.BeginModule(&M);
+void X86AsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op,
+ raw_ostream &O, const char *Modifier) {
+ const MachineOperand &BaseReg = MI->getOperand(Op);
+ const MachineOperand &IndexReg = MI->getOperand(Op+2);
+ const MachineOperand &DispSpec = MI->getOperand(Op+3);
+
+ // 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;
+
+ if (DispSpec.isImm()) {
+ int DispVal = DispSpec.getImm();
+ if (DispVal || !HasParenPart)
+ O << DispVal;
+ } else {
+ assert(DispSpec.isGlobal() || DispSpec.isCPI() ||
+ DispSpec.isJTI() || DispSpec.isSymbol());
+ printSymbolOperand(MI->getOperand(Op+3), 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(MI, Op, O, Modifier);
+
+ if (IndexReg.getReg()) {
+ O << ',';
+ printOperand(MI, Op+2, O, Modifier);
+ unsigned ScaleVal = MI->getOperand(Op+1).getImm();
+ if (ScaleVal != 1)
+ O << ',' << ScaleVal;
+ }
+ O << ')';
}
+}
- return AsmPrinter::doInitialization(M);
+void X86AsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
+ raw_ostream &O, const char *Modifier) {
+ assert(isMem(MI, Op) && "Invalid memory reference!");
+ const MachineOperand &Segment = MI->getOperand(Op+4);
+ if (Segment.getReg()) {
+ printOperand(MI, Op+4, O, Modifier);
+ O << ':';
+ }
+ printLeaMemReference(MI, Op, O, Modifier);
}
-bool X86SharedAsmPrinter::doFinalization(Module &M) {
- // Note: this code is not shared by the Intel printer as it is too different
- // from how MASM does things. When making changes here don't forget to look
- // at X86IntelAsmPrinter::doFinalization().
- const TargetData *TD = TM.getTargetData();
+void X86AsmPrinter::printIntelMemReference(const MachineInstr *MI, unsigned Op,
+ raw_ostream &O, const char *Modifier,
+ unsigned AsmVariant){
+ const MachineOperand &BaseReg = MI->getOperand(Op);
+ unsigned ScaleVal = MI->getOperand(Op+1).getImm();
+ const MachineOperand &IndexReg = MI->getOperand(Op+2);
+ const MachineOperand &DispSpec = MI->getOperand(Op+3);
+ const MachineOperand &SegReg = MI->getOperand(Op+4);
- // Print out module-level global variables here.
- for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
- I != E; ++I) {
- if (!I->hasInitializer())
- continue; // External global require no code
-
- // Check to see if this is a special global used by LLVM, if so, emit it.
- if (EmitSpecialLLVMGlobal(I))
- continue;
-
- std::string name = Mang->getValueName(I);
- Constant *C = I->getInitializer();
- unsigned Size = TD->getTypeSize(C->getType());
- unsigned Align = TD->getPreferredAlignmentLog(I);
-
- if (I->hasHiddenVisibility())
- if (const char *Directive = TAI->getHiddenDirective())
- O << Directive << name << "\n";
- if (Subtarget->isTargetELF())
- O << "\t.type " << name << ",@object\n";
-
- if (C->isNullValue()) {
- if (I->hasExternalLinkage()) {
- if (const char *Directive = TAI->getZeroFillDirective()) {
- O << "\t.globl\t" << name << "\n";
- O << Directive << "__DATA__, __common, " << name << ", "
- << Size << ", " << Align << "\n";
- continue;
- }
- }
-
- if (!I->hasSection() &&
- (I->hasInternalLinkage() || I->hasWeakLinkage() ||
- I->hasLinkOnceLinkage())) {
- if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
- if (!NoZerosInBSS && TAI->getBSSSection())
- SwitchToDataSection(TAI->getBSSSection(), I);
- else
- SwitchToDataSection(TAI->getDataSection(), I);
- if (TAI->getLCOMMDirective() != NULL) {
- if (I->hasInternalLinkage()) {
- O << TAI->getLCOMMDirective() << name << "," << Size;
- if (Subtarget->isTargetDarwin())
- O << "," << Align;
- } else
- O << TAI->getCOMMDirective() << name << "," << Size;
- } else {
- if (!Subtarget->isTargetCygMing()) {
- if (I->hasInternalLinkage())
- O << "\t.local\t" << name << "\n";
- }
- O << TAI->getCOMMDirective() << name << "," << Size;
- if (TAI->getCOMMDirectiveTakesAlignment())
- O << "," << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
- }
- O << "\t\t" << TAI->getCommentString() << " " << I->getName() << "\n";
- continue;
+ // If this has a segment register, print it.
+ if (SegReg.getReg()) {
+ printOperand(MI, Op+4, O, Modifier, AsmVariant);
+ O << ':';
+ }
+
+ O << '[';
+
+ bool NeedPlus = false;
+ if (BaseReg.getReg()) {
+ printOperand(MI, Op, O, Modifier, AsmVariant);
+ NeedPlus = true;
+ }
+
+ if (IndexReg.getReg()) {
+ if (NeedPlus) O << " + ";
+ if (ScaleVal != 1)
+ O << ScaleVal << '*';
+ printOperand(MI, Op+2, O, Modifier, AsmVariant);
+ NeedPlus = true;
+ }
+
+ assert (DispSpec.isImm() && "Displacement is not an immediate!");
+ int64_t DispVal = DispSpec.getImm();
+ if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg())) {
+ if (NeedPlus) {
+ if (DispVal > 0)
+ O << " + ";
+ else {
+ O << " - ";
+ DispVal = -DispVal;
}
}
+ O << DispVal;
+ }
+ O << ']';
+}
+
+bool X86AsmPrinter::printAsmMRegister(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, 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, 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.
- switch (I->getLinkage()) {
- case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage:
- if (Subtarget->isTargetDarwin()) {
- O << "\t.globl " << name << "\n"
- << "\t.weak_definition " << name << "\n";
- SwitchToDataSection(".section __DATA,__const_coal,coalesced", I);
- } else if (Subtarget->isTargetCygMing()) {
- std::string SectionName(".section\t.data$linkonce." +
- name +
- ",\"aw\"");
- SwitchToDataSection(SectionName.c_str(), I);
- O << "\t.globl " << name << "\n"
- << "\t.linkonce same_size\n";
- } else {
- std::string SectionName("\t.section\t.llvm.linkonce.d." +
- name +
- ",\"aw\",@progbits");
- SwitchToDataSection(SectionName.c_str(), I);
- O << "\t.weak " << name << "\n";
+ 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.
+ if (MO.isImm()) {
+ O << MO.getImm();
+ return false;
}
- break;
- case GlobalValue::AppendingLinkage:
- // FIXME: appending linkage variables should go into a section of
- // their name or something. For now, just emit them as external.
- case GlobalValue::DLLExportLinkage:
- DLLExportedGVs.insert(Mang->makeNameProper(I->getName(),""));
- // FALL THROUGH
- case GlobalValue::ExternalLinkage:
- // If external or appending, declare as a global symbol
- O << "\t.globl " << name << "\n";
- // FALL THROUGH
- case GlobalValue::InternalLinkage: {
- if (I->isConstant()) {
- const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
- if (TAI->getCStringSection() && CVA && CVA->isCString()) {
- SwitchToDataSection(TAI->getCStringSection(), I);
- break;
- }
+ if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) {
+ printSymbolOperand(MO, O);
+ if (Subtarget->isPICStyleRIPRel())
+ O << "(%rip)";
+ return false;
}
- // FIXME: special handling for ".ctors" & ".dtors" sections
- if (I->hasSection() &&
- (I->getSection() == ".ctors" ||
- I->getSection() == ".dtors")) {
- std::string SectionName = ".section " + I->getSection();
-
- if (Subtarget->isTargetCygMing()) {
- SectionName += ",\"aw\"";
- } else {
- assert(!Subtarget->isTargetDarwin());
- SectionName += ",\"aw\",@progbits";
- }
-
- SwitchToDataSection(SectionName.c_str());
- } else {
- if (C->isNullValue() && !NoZerosInBSS && TAI->getBSSSection())
- SwitchToDataSection(TAI->getBSSSection(), I);
- else
- SwitchToDataSection(TAI->getDataSection(), I);
+ if (MO.isReg()) {
+ O << '(';
+ printOperand(MI, OpNo, O);
+ O << ')';
+ return false;
}
-
- break;
- }
- default:
- assert(0 && "Unknown linkage type!");
- }
+ return true;
- EmitAlignment(Align, I);
- O << name << ":\t\t\t\t" << TAI->getCommentString() << " " << I->getName()
- << "\n";
- if (TAI->hasDotTypeDotSizeDirective())
- O << "\t.size " << name << ", " << Size << "\n";
- // If the initializer is a extern weak symbol, remember to emit the weak
- // reference!
- if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
- if (GV->hasExternalWeakLinkage())
- ExtWeakSymbols.insert(GV);
-
- EmitGlobalConstant(C);
- O << '\n';
- }
-
- // Output linker support code for dllexported globals
- if (DLLExportedGVs.begin() != DLLExportedGVs.end()) {
- SwitchToDataSection(".section .drectve");
+ 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, O);
+ else
+ printOperand(MI, OpNo, O);
+ return false;
+
+ case 'A': // Print '*' before a register (it must be a register)
+ if (MO.isReg()) {
+ O << '*';
+ printOperand(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(MO, ExtraCode[0], O);
+ printOperand(MI, OpNo, O);
+ return false;
+
+ case 'P': // This is the operand of a call, treat specially.
+ printPCRelImm(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 << '-';
+ }
}
- for (std::set<std::string>::iterator i = DLLExportedGVs.begin(),
- e = DLLExportedGVs.end();
- i != e; ++i) {
- O << "\t.ascii \" -export:" << *i << ",data\"\n";
- }
+ printOperand(MI, OpNo, O, /*Modifier*/ 0, AsmVariant);
+ return false;
+}
- if (DLLExportedFns.begin() != DLLExportedFns.end()) {
- SwitchToDataSection(".section .drectve");
+bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo, unsigned AsmVariant,
+ const char *ExtraCode,
+ raw_ostream &O) {
+ if (AsmVariant) {
+ printIntelMemReference(MI, OpNo, O);
+ return false;
}
- for (std::set<std::string>::iterator i = DLLExportedFns.begin(),
- e = DLLExportedFns.end();
- i != e; ++i) {
- O << "\t.ascii \" -export:" << *i << "\"\n";
- }
-
- if (Subtarget->isTargetDarwin()) {
- SwitchToDataSection("");
-
- // Output stubs for dynamically-linked functions
- unsigned j = 1;
- for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
- i != e; ++i, ++j) {
- SwitchToDataSection(".section __IMPORT,__jump_table,symbol_stubs,"
- "self_modifying_code+pure_instructions,5", 0);
- O << "L" << *i << "$stub:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\thlt ; hlt ; hlt ; hlt ; hlt\n";
+ if (ExtraCode && ExtraCode[0]) {
+ if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+ switch (ExtraCode[0]) {
+ default: return true; // Unknown modifier.
+ case 'b': // Print QImode register
+ case 'h': // Print QImode high register
+ case 'w': // Print HImode register
+ case 'k': // Print SImode register
+ case 'q': // Print SImode register
+ // These only apply to registers, ignore on mem.
+ break;
+ case 'H':
+ printMemReference(MI, OpNo, O, "H");
+ return false;
+ case 'P': // Don't print @PLT, but do print as memory.
+ printMemReference(MI, OpNo, O, "no-rip");
+ return false;
}
+ }
+ printMemReference(MI, OpNo, O);
+ return false;
+}
+
+void X86AsmPrinter::EmitStartOfAsmFile(Module &M) {
+ if (Subtarget->isTargetEnvMacho())
+ OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
+}
+
- O << "\n";
+void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
+ if (Subtarget->isTargetEnvMacho()) {
+ // All darwin targets use mach-o.
+ MachineModuleInfoMachO &MMIMacho =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>();
+
+ // Output stubs for dynamically-linked functions.
+ MachineModuleInfoMachO::SymbolListTy Stubs;
+
+ Stubs = MMIMacho.GetFnStubList();
+ if (!Stubs.empty()) {
+ const MCSection *TheSection =
+ OutContext.getMachOSection("__IMPORT", "__jump_table",
+ MCSectionMachO::S_SYMBOL_STUBS |
+ MCSectionMachO::S_ATTR_SELF_MODIFYING_CODE |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ 5, SectionKind::getMetadata());
+ OutStreamer.SwitchSection(TheSection);
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ // L_foo$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.
- if (GVStubs.begin() != GVStubs.end())
- SwitchToDataSection(
- ".section __IMPORT,__pointers,non_lazy_symbol_pointers");
- for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
- i != e; ++i) {
- O << "L" << *i << "$non_lazy_ptr:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\t.long\t0\n";
+ Stubs = MMIMacho.GetGVStubList();
+ if (!Stubs.empty()) {
+ const MCSection *TheSection =
+ OutContext.getMachOSection("__IMPORT", "__pointers",
+ MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+ OutStreamer.SwitchSection(TheSection);
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ // L_foo$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();
}
- // Emit final debug information.
- DW.EndModule();
+ 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.
- O << "\t.subsections_via_symbols\n";
- } else if (Subtarget->isTargetCygMing()) {
+ OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
+ }
+
+ if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing() &&
+ MMI->usesVAFloatArgument()) {
+ 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
- for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
- i != e; ++i) {
- O << "\t.def\t " << *i
- << ";\t.scl\t" << COFF::C_EXT
- << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
- << ";\t.endef\n";
+ 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);
+ }
}
-
- // Emit final debug information.
- DW.EndModule();
- } else if (Subtarget->isTargetELF()) {
- // Emit final debug information.
- DW.EndModule();
}
- AsmPrinter::doFinalization(M);
- return false; // success
+ 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 DataLayout *TD = TM.getDataLayout();
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ OutStreamer.EmitLabel(Stubs[i].first);
+ OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(),
+ TD->getPointerSize(0), 0);
+ }
+ Stubs.clear();
+ }
+ }
}
-/// createX86CodePrinterPass - Returns a pass that prints the X86 assembly code
-/// for a MachineFunction to the given output stream, using the given target
-/// machine description.
-///
-FunctionPass *llvm::createX86CodePrinterPass(std::ostream &o,
- X86TargetMachine &tm) {
- const X86Subtarget *Subtarget = &tm.getSubtarget<X86Subtarget>();
+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 (Subtarget->isFlavorIntel()) {
- return new X86IntelAsmPrinter(o, tm, tm.getTargetAsmInfo());
- } else {
- return new X86ATTAsmPrinter(o, tm, tm.getTargetAsmInfo());
+ 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);
}