-//===-- 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 "X86IntelAsmPrinter.h"
-#include "X86Subtarget.h"
-#include "llvm/Constants.h"
-#include "llvm/Module.h"
-#include "llvm/Type.h"
+#include "InstPrinter/X86ATTInstPrinter.h"
+#include "X86.h"
+#include "X86COFFMachineModuleInfo.h"
+#include "X86MachineFunctionInfo.h"
+#include "X86TargetMachine.h"
+#include "llvm/ADT/SmallString.h"
#include "llvm/Assembly/Writer.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Support/CommandLine.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/DebugInfo.h"
+#include "llvm/IR/CallingConv.h"
+#include "llvm/IR/DerivedTypes.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/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"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetOptions.h"
using namespace llvm;
-Statistic<> llvm::EmittedInsts("asm-printer",
- "Number of machine instrs printed");
-
-enum AsmWriterFlavorTy { att, intel };
-cl::opt<AsmWriterFlavorTy>
-AsmWriterFlavor("x86-asm-syntax",
- cl::desc("Choose style of code to emit from X86 backend:"),
- cl::values(
- clEnumVal(att, " Emit AT&T-style assembly"),
- clEnumVal(intel, " Emit Intel-style assembly"),
- clEnumValEnd),
-#ifdef _MSC_VER
- cl::init(intel)
-#else
- cl::init(att)
-#endif
- );
-
-/// doInitialization
-bool X86SharedAsmPrinter::doInitialization(Module &M) {
- const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
-
- forDarwin = false;
- PrivateGlobalPrefix = ".L";
-
- switch (Subtarget->TargetType) {
- case X86Subtarget::isDarwin:
- AlignmentIsInBytes = false;
- GlobalPrefix = "_";
- Data64bitsDirective = 0; // we can't emit a 64-bit unit
- ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
- PrivateGlobalPrefix = "L"; // Marker for constant pool idxs
- ConstantPoolSection = "\t.const\n";
- JumpTableSection = "\t.const\n"; // FIXME: depends on PIC mode
- LCOMMDirective = "\t.lcomm\t";
- COMMDirectiveTakesAlignment = false;
- HasDotTypeDotSizeDirective = false;
- forDarwin = true;
- StaticCtorsSection = ".mod_init_func";
- StaticDtorsSection = ".mod_term_func";
- InlineAsmStart = InlineAsmEnd = ""; // Don't use #APP/#NO_APP
+//===----------------------------------------------------------------------===//
+// 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 X86Subtarget::isCygwin:
- GlobalPrefix = "_";
- COMMDirectiveTakesAlignment = false;
- HasDotTypeDotSizeDirective = false;
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << *GetCPISymbol(MO.getIndex());
+ printOffset(MO.getOffset(), O);
break;
- case X86Subtarget::isWindows:
- GlobalPrefix = "_";
- HasDotTypeDotSizeDirective = false;
+ 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: break;
}
-
- if (forDarwin) {
- // Emit initial debug information.
- DW.BeginModule(&M);
+ case MachineOperand::MO_ExternalSymbol: {
+ const MCSymbol *SymToPrint;
+ if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
+ SmallString<128> TempNameStr;
+ TempNameStr += StringRef(MO.getSymbolName());
+ TempNameStr += StringRef("$stub");
+
+ MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str());
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
+ if (StubSym.getPointer() == 0) {
+ TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end());
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(OutContext.GetOrCreateSymbol(TempNameStr.str()),
+ true);
+ }
+ SymToPrint = StubSym.getPointer();
+ } else {
+ SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName());
+ }
+
+ // If the name begins with a dollar-sign, enclose it in parens. We do this
+ // to avoid having it look like an integer immediate to the assembler.
+ if (SymToPrint->getName()[0] != '$')
+ 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 << "@SECREL32"; break;
}
+}
- return AsmPrinter::doInitialization(M);
+/// 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;
+ }
}
-bool X86SharedAsmPrinter::doFinalization(Module &M) {
- const TargetData *TD = TM.getTargetData();
-
- // 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 = getPreferredAlignmentLog(I);
-
- if (C->isNullValue() && /* FIXME: Verify correct */
- (I->hasInternalLinkage() || I->hasWeakLinkage() ||
- I->hasLinkOnceLinkage() ||
- (forDarwin && I->hasExternalLinkage() && !I->hasSection()))) {
- if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
- if (I->hasExternalLinkage()) {
- O << "\t.globl\t" << name << "\n";
- O << "\t.zerofill __DATA__, __common, " << name << ", "
- << Size << ", " << Align;
- } else {
- SwitchSection(".data", I);
- if (LCOMMDirective != NULL) {
- if (I->hasInternalLinkage()) {
- O << LCOMMDirective << name << "," << Size;
- if (forDarwin)
- O << "," << (AlignmentIsInBytes ? (1 << Align) : Align);
- } else
- O << COMMDirective << name << "," << Size;
- } else {
- if (I->hasInternalLinkage())
- O << "\t.local\t" << name << "\n";
- O << COMMDirective << name << "," << Size;
- if (COMMDirectiveTakesAlignment)
- O << "," << (AlignmentIsInBytes ? (1 << Align) : Align);
+
+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;
+ }
+
+ case MachineOperand::MO_Immediate:
+ if (AsmVariant == 0) O << '$';
+ O << MO.getImm();
+ return;
+
+ case MachineOperand::MO_JumpTableIndex:
+ case MachineOperand::MO_ConstantPoolIndex:
+ case MachineOperand::MO_GlobalAddress:
+ case MachineOperand::MO_ExternalSymbol: {
+ if (AsmVariant == 0) O << '$';
+ printSymbolOperand(MO, O);
+ break;
+ }
+ }
+}
+
+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 << ')';
+ }
+}
+
+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);
+}
+
+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);
+
+ // 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;
+ }
+
+ if (!DispSpec.isImm()) {
+ if (NeedPlus) O << " + ";
+ printOperand(MI, Op+3, 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 << "\t\t" << CommentString << " " << I->getName() << "\n";
- } else {
- switch (I->getLinkage()) {
- case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage:
- if (forDarwin) {
- O << "\t.globl " << name << "\n"
- << "\t.weak_definition " << name << "\n";
- SwitchSection(".section __DATA,__datacoal_nt,coalesced", I);
- } else {
- O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
- O << "\t.weak " << name << "\n";
- }
- 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::ExternalLinkage:
- // If external or appending, declare as a global symbol
- O << "\t.globl " << name << "\n";
- // FALL THROUGH
- case GlobalValue::InternalLinkage:
- SwitchSection(".data", I);
- break;
- default:
- assert(0 && "Unknown linkage type!");
+ 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.
+
+ 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;
+ }
+ if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) {
+ printSymbolOperand(MO, O);
+ if (Subtarget->isPICStyleRIPRel())
+ O << "(%rip)";
+ return false;
+ }
+ if (MO.isReg()) {
+ O << '(';
+ printOperand(MI, OpNo, O);
+ O << ')';
+ return false;
+ }
+ return true;
+
+ case 'c': // Don't print "$" before a global var name or constant.
+ if (MO.isImm())
+ O << MO.getImm();
+ else if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol())
+ printSymbolOperand(MO, O);
+ else
+ printOperand(MI, OpNo, O);
+ return false;
+
+ case 'A': // Print '*' before a register (it must be a register)
+ if (MO.isReg()) {
+ O << '*';
+ printOperand(MI, OpNo, O);
+ return false;
}
+ return true;
+
+ case 'b': // Print QImode register
+ case 'h': // Print QImode high register
+ case 'w': // Print HImode register
+ case 'k': // Print SImode register
+ case 'q': // Print DImode register
+ if (MO.isReg())
+ return printAsmMRegister(MO, ExtraCode[0], O);
+ printOperand(MI, OpNo, O);
+ return false;
- EmitAlignment(Align, I);
- O << name << ":\t\t\t\t" << CommentString << " " << I->getName()
- << "\n";
- if (HasDotTypeDotSizeDirective)
- O << "\t.size " << name << ", " << Size << "\n";
+ case 'P': // This is the operand of a call, treat specially.
+ printPCRelImm(MI, OpNo, O);
+ return false;
- EmitGlobalConstant(C);
- O << '\n';
+ case 'n': // Negate the immediate or print a '-' before the operand.
+ // Note: this is a temporary solution. It should be handled target
+ // independently as part of the 'MC' work.
+ if (MO.isImm()) {
+ O << -MO.getImm();
+ return false;
+ }
+ O << '-';
}
}
-
- if (forDarwin) {
- SwitchSection("", 0);
-
- // Output stubs for dynamically-linked functions
- unsigned j = 1;
- for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
- i != e; ++i, ++j) {
- SwitchSection(".section __IMPORT,__jump_table,symbol_stubs,"
- "self_modifying_code+pure_instructions,5", 0);
- O << "L" << *i << "$stub:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\thlt ; hlt ; hlt ; hlt ; hlt\n";
+
+ printOperand(MI, OpNo, O, /*Modifier*/ 0, AsmVariant);
+ return false;
+}
+
+bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo, unsigned AsmVariant,
+ const char *ExtraCode,
+ raw_ostream &O) {
+ if (AsmVariant) {
+ printIntelMemReference(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(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);
- O << "\n";
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ // L_foo$stub:
+ OutStreamer.EmitLabel(Stubs[i].first);
+ // .indirect_symbol _foo
+ OutStreamer.EmitSymbolAttribute(Stubs[i].second.getPointer(),
+ MCSA_IndirectSymbol);
+ // hlt; hlt; hlt; hlt; hlt hlt = 0xf4.
+ const char HltInsts[] = "\xf4\xf4\xf4\xf4\xf4";
+ OutStreamer.EmitBytes(StringRef(HltInsts, 5));
+ }
+
+ Stubs.clear();
+ OutStreamer.AddBlankLine();
+ }
// Output stubs for external and common global variables.
- if (GVStubs.begin() != GVStubs.end())
- SwitchSection(".section __IMPORT,__pointers,non_lazy_symbol_pointers", 0);
- for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
- i != e; ++i) {
- O << "L" << *i << "$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$non_lazy_ptr:
+ OutStreamer.EmitLabel(Stubs[i].first);
+ // .indirect_symbol _foo
+ MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
+ OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),
+ MCSA_IndirectSymbol);
+ // .long 0
+ if (MCSym.getInt())
+ // External to current translation unit.
+ OutStreamer.EmitIntValue(0, 4/*size*/);
+ else
+ // Internal to current translation unit.
+ //
+ // When we place the LSDA into the TEXT section, the type info
+ // pointers need to be indirect and pc-rel. We accomplish this by
+ // using NLPs. However, sometimes the types are local to the file. So
+ // we need to fill in the value for the NLP in those cases.
+ OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
+ OutContext), 4/*size*/);
+ }
+ Stubs.clear();
+ OutStreamer.AddBlankLine();
}
- // Emit initial debug information.
- DW.EndModule();
+ Stubs = MMIMacho.GetHiddenGVStubList();
+ if (!Stubs.empty()) {
+ OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
+ EmitAlignment(2);
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ // L_foo$non_lazy_ptr:
+ OutStreamer.EmitLabel(Stubs[i].first);
+ // .long _foo
+ OutStreamer.EmitValue(MCSymbolRefExpr::
+ Create(Stubs[i].second.getPointer(),
+ OutContext), 4/*size*/);
+ }
+ 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";
+ OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
}
- AsmPrinter::doFinalization(M);
- return false; // success
-}
+ if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing() &&
+ MMI->usesVAFloatArgument()) {
+ StringRef SymbolName = Subtarget->is64Bit() ? "_fltused" : "__fltused";
+ MCSymbol *S = MMI->getContext().GetOrCreateSymbol(SymbolName);
+ OutStreamer.EmitSymbolAttribute(S, MCSA_Global);
+ }
-/// 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){
- switch (AsmWriterFlavor) {
- default:
- assert(0 && "Unknown asm flavor!");
- case intel:
- return new X86IntelAsmPrinter(o, tm);
- case att:
- return new X86ATTAsmPrinter(o, tm);
+ 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);
+ }
+
+ 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);
+ }
+ }
+ }
+
+ 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());
+ }
+ Stubs.clear();
+ }
}
}
+
+//===----------------------------------------------------------------------===//
+// Target Registry Stuff
+//===----------------------------------------------------------------------===//
+
+// Force static initialization.
+extern "C" void LLVMInitializeX86AsmPrinter() {
+ RegisterAsmPrinter<X86AsmPrinter> X(TheX86_32Target);
+ RegisterAsmPrinter<X86AsmPrinter> Y(TheX86_64Target);
+}