-//===-- 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 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 AT&T format assembly
+// language. This printer is the output mechanism used by `llc'.
//
//===----------------------------------------------------------------------===//
-#include "X86ATTAsmPrinter.h"
-#include "X86IntelAsmPrinter.h"
-#include "X86Subtarget.h"
+#define DEBUG_TYPE "asm-printer"
+#include "X86AsmPrinter.h"
+#include "X86ATTInstPrinter.h"
+#include "X86IntelInstPrinter.h"
+#include "X86MCInstLower.h"
+#include "X86.h"
+#include "X86COFF.h"
+#include "X86COFFMachineModuleInfo.h"
+#include "X86MachineFunctionInfo.h"
+#include "X86TargetMachine.h"
+#include "llvm/CallingConv.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/Type.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/MC/MCContext.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/Support/ErrorHandling.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Statistic.h"
using namespace llvm;
-/// createX86CodePrinterPass - Returns a pass that prints the X86 assembly code
-/// for a MachineFunction to the given output stream, using the given target
-/// machine description.
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+//===----------------------------------------------------------------------===//
+// Primitive Helper Functions.
+//===----------------------------------------------------------------------===//
+
+void X86AsmPrinter::printMCInst(const MCInst *MI) {
+ if (MAI->getAssemblerDialect() == 0)
+ X86ATTInstPrinter(O, *MAI).printInstruction(MI);
+ else
+ X86IntelInstPrinter(O, *MAI).printInstruction(MI);
+}
+
+void X86AsmPrinter::PrintPICBaseSymbol() const {
+ // FIXME: Gross const cast hack.
+ X86AsmPrinter *AP = const_cast<X86AsmPrinter*>(this);
+ O << *X86MCInstLower(OutContext, 0, *AP).GetPICBaseSymbol();
+}
+
+void X86AsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
+ unsigned FnAlign = MF.getAlignment();
+ const Function *F = MF.getFunction();
+
+ if (Subtarget->isTargetCygMing()) {
+ X86COFFMachineModuleInfo &COFFMMI =
+ MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
+ COFFMMI.DecorateCygMingName(CurrentFnSym, OutContext, F,
+ *TM.getTargetData());
+ }
+
+ OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
+ EmitAlignment(FnAlign, F);
+
+ switch (F->getLinkage()) {
+ default: llvm_unreachable("Unknown linkage type!");
+ case Function::InternalLinkage: // Symbols default to internal.
+ case Function::PrivateLinkage:
+ break;
+ case Function::DLLExportLinkage:
+ case Function::ExternalLinkage:
+ OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_Global);
+ break;
+ case Function::LinkerPrivateLinkage:
+ case Function::LinkOnceAnyLinkage:
+ case Function::LinkOnceODRLinkage:
+ case Function::WeakAnyLinkage:
+ case Function::WeakODRLinkage:
+ if (Subtarget->isTargetDarwin()) {
+ OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_Global);
+ O << MAI->getWeakDefDirective() << *CurrentFnSym << '\n';
+ } else if (Subtarget->isTargetCygMing()) {
+ OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_Global);
+ // FIXME: linkonce should be a section attribute, handled by COFF Section
+ // assignment.
+ // http://sourceware.org/binutils/docs-2.20/as/Linkonce.html#Linkonce
+ O << "\t.linkonce discard\n";
+ } else {
+ O << "\t.weak\t" << *CurrentFnSym << '\n';
+ }
+ break;
+ }
+
+ printVisibility(CurrentFnSym, F->getVisibility());
+
+ if (MAI->hasDotTypeDotSizeDirective()) {
+ OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction);
+ } else if (Subtarget->isTargetCygMing()) {
+ O << "\t.def\t " << *CurrentFnSym;
+ O << ";\t.scl\t" <<
+ (F->hasInternalLinkage() ? COFF::C_STAT : COFF::C_EXT)
+ << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
+ << ";\t.endef\n";
+ }
+
+ O << *CurrentFnSym << ':';
+ if (VerboseAsm) {
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << ' ';
+ WriteAsOperand(O, F, /*PrintType=*/false, F->getParent());
+ }
+ O << '\n';
+
+ // Add some workaround for linkonce linkage on Cygwin\MinGW
+ if (Subtarget->isTargetCygMing() &&
+ (F->hasLinkOnceLinkage() || F->hasWeakLinkage()))
+ O << "Lllvm$workaround$fake$stub$" << *CurrentFnSym << ":\n";
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
///
-FunctionPass *llvm::createX86CodePrinterPass(raw_ostream &o,
- X86TargetMachine &tm,
- CodeGenOpt::Level OptLevel,
- bool verbose) {
- const X86Subtarget *Subtarget = &tm.getSubtarget<X86Subtarget>();
+bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ const Function *F = MF.getFunction();
+ this->MF = &MF;
+ CallingConv::ID CC = F->getCallingConv();
+
+ SetupMachineFunction(MF);
+ O << "\n\n";
+
+ if (Subtarget->isTargetCOFF()) {
+ X86COFFMachineModuleInfo &COFFMMI =
+ MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
+
+ // Populate function information map. Don't want to populate
+ // non-stdcall or non-fastcall functions' information right now.
+ if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall)
+ COFFMMI.AddFunctionInfo(F, *MF.getInfo<X86MachineFunctionInfo>());
+ }
+
+ // Print out constants referenced by the function
+ EmitConstantPool(MF.getConstantPool());
+
+ // Print the 'header' of function
+ emitFunctionHeader(MF);
+
+ // Emit pre-function debug and/or EH information.
+ if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
+ DW->BeginFunction(&MF);
+
+ // Print out code for the function.
+ bool hasAnyRealCode = false;
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+ // Print a label for the basic block.
+ EmitBasicBlockStart(I);
+ for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
+ II != IE; ++II) {
+ // Print the assembly for the instruction.
+ if (!II->isLabel())
+ hasAnyRealCode = true;
+ printMachineInstruction(II);
+ }
+ }
+
+ if (Subtarget->isTargetDarwin() && !hasAnyRealCode) {
+ // If the function is empty, then we need to emit *something*. Otherwise,
+ // the function's label might be associated with something that it wasn't
+ // meant to be associated with. We emit a noop in this situation.
+ // We are assuming inline asms are code.
+ O << "\tnop\n";
+ }
+
+ if (MAI->hasDotTypeDotSizeDirective())
+ O << "\t.size\t" << *CurrentFnSym << ", .-" << *CurrentFnSym << '\n';
+
+ // Emit post-function debug information.
+ if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
+ DW->EndFunction(&MF);
- if (Subtarget->isFlavorIntel())
- return new X86IntelAsmPrinter(o, tm, tm.getTargetAsmInfo(),
- OptLevel, verbose);
- return new X86ATTAsmPrinter(o, tm, tm.getTargetAsmInfo(),
- OptLevel, verbose);
+ // Print out jump tables referenced by the function.
+ EmitJumpTableInfo(MF);
+
+ // We didn't modify anything.
+ return false;
}
-namespace {
- static struct Register {
- Register() {
- X86TargetMachine::registerAsmPrinter(createX86CodePrinterPass);
+/// 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) {
+ switch (MO.getType()) {
+ default: llvm_unreachable("unknown symbol type!");
+ case MachineOperand::MO_JumpTableIndex:
+ O << *GetJTISymbol(MO.getIndex());
+ break;
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << *GetCPISymbol(MO.getIndex());
+ printOffset(MO.getOffset());
+ 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 = GetGlobalValueSymbol(GV);
+
+ if (Subtarget->isTargetCygMing()) {
+ X86COFFMachineModuleInfo &COFFMMI =
+ MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
+ COFFMMI.DecorateCygMingName(GVSym, OutContext, GV, *TM.getTargetData());
+ }
+
+ // 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, "$non_lazy_ptr");
+
+ const MCSymbol *&StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym);
+ if (StubSym == 0)
+ StubSym = GetGlobalValueSymbol(GV);
+
+ } else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){
+ MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
+ const MCSymbol *&StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getHiddenGVStubEntry(Sym);
+ if (StubSym == 0)
+ StubSym = GetGlobalValueSymbol(GV);
+ } else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
+ MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$stub");
+ const MCSymbol *&StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
+ if (StubSym == 0)
+ StubSym = GetGlobalValueSymbol(GV);
+ }
+
+ // If the name begins with a dollar-sign, enclose it in parens. We do this
+ // to avoid having it look like an integer immediate to the assembler.
+ if (GVSym->getName()[0] != '$')
+ O << *GVSym;
+ else
+ O << '(' << *GVSym << ')';
+ printOffset(MO.getOffset());
+ break;
+ }
+ case MachineOperand::MO_ExternalSymbol: {
+ const MCSymbol *SymToPrint;
+ if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
+ SmallString<128> TempNameStr;
+ TempNameStr += StringRef(MO.getSymbolName());
+ TempNameStr += StringRef("$stub");
+
+ const MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str());
+ const MCSymbol *&StubSym =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
+ if (StubSym == 0) {
+ TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end());
+ StubSym = OutContext.GetOrCreateSymbol(TempNameStr.str());
+ }
+ SymToPrint = StubSym;
+ } else {
+ SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName());
}
- } Registrator;
+
+ // If the name begins with a dollar-sign, enclose it in parens. We do this
+ // to avoid having it look like an integer immediate to the assembler.
+ if (SymToPrint->getName()[0] != '$')
+ 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 << " + [.-";
+ PrintPICBaseSymbol();
+ O << ']';
+ break;
+ case X86II::MO_PIC_BASE_OFFSET:
+ case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
+ case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
+ O << '-';
+ PrintPICBaseSymbol();
+ break;
+ case X86II::MO_TLSGD: O << "@TLSGD"; 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_NTPOFF: O << "@NTPOFF"; 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;
+ }
}
-extern "C" int X86AsmPrinterForceLink;
-int X86AsmPrinterForceLink = 0;
+/// print_pcrel_imm - 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::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo) {
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ switch (MO.getType()) {
+ default: llvm_unreachable("Unknown pcrel immediate operand");
+ case MachineOperand::MO_Immediate:
+ O << MO.getImm();
+ return;
+ case MachineOperand::MO_MachineBasicBlock:
+ O << *GetMBBSymbol(MO.getMBB()->getNumber());
+ return;
+ case MachineOperand::MO_GlobalAddress:
+ case MachineOperand::MO_ExternalSymbol:
+ printSymbolOperand(MO);
+ return;
+ }
+}
+
+
+void X86AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
+ const char *Modifier) {
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ switch (MO.getType()) {
+ default: llvm_unreachable("unknown operand type!");
+ case MachineOperand::MO_Register: {
+ O << '%';
+ unsigned Reg = MO.getReg();
+ if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
+ EVT 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:
+ O << '$' << MO.getImm();
+ return;
+
+ case MachineOperand::MO_JumpTableIndex:
+ case MachineOperand::MO_ConstantPoolIndex:
+ case MachineOperand::MO_GlobalAddress:
+ case MachineOperand::MO_ExternalSymbol: {
+ O << '$';
+ printSymbolOperand(MO);
+ break;
+ }
+ }
+}
+
+void X86AsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) {
+ unsigned char value = MI->getOperand(Op).getImm();
+ assert(value <= 7 && "Invalid ssecc argument!");
+ switch (value) {
+ case 0: O << "eq"; break;
+ case 1: O << "lt"; break;
+ case 2: O << "le"; break;
+ case 3: O << "unord"; break;
+ case 4: O << "neq"; break;
+ case 5: O << "nlt"; break;
+ case 6: O << "nle"; break;
+ case 7: O << "ord"; break;
+ }
+}
+
+void X86AsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op,
+ 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));
+ }
+
+ if (HasParenPart) {
+ assert(IndexReg.getReg() != X86::ESP &&
+ "X86 doesn't allow scaling by ESP");
+
+ O << '(';
+ if (HasBaseReg)
+ printOperand(MI, Op, Modifier);
+
+ if (IndexReg.getReg()) {
+ O << ',';
+ printOperand(MI, Op+2, Modifier);
+ unsigned ScaleVal = MI->getOperand(Op+1).getImm();
+ if (ScaleVal != 1)
+ O << ',' << ScaleVal;
+ }
+ O << ')';
+ }
+}
+
+void X86AsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
+ const char *Modifier) {
+ assert(isMem(MI, Op) && "Invalid memory reference!");
+ const MachineOperand &Segment = MI->getOperand(Op+4);
+ if (Segment.getReg()) {
+ printOperand(MI, Op+4, Modifier);
+ O << ':';
+ }
+ printLeaMemReference(MI, Op, Modifier);
+}
+
+void X86AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
+ const MachineBasicBlock *MBB) const {
+ if (!MAI->getSetDirective())
+ return;
+
+ // We don't need .set machinery if we have GOT-style relocations
+ if (Subtarget->isPICStyleGOT()) // X86-32 on ELF.
+ return;
+
+ O << MAI->getSetDirective() << ' ' << MAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
+
+ O << *GetMBBSymbol(MBB->getNumber());
+
+ if (Subtarget->isPICStyleRIPRel())
+ O << '-' << *GetJTISymbol(uid) << '\n';
+ else {
+ O << '-';
+ PrintPICBaseSymbol();
+ O << '\n';
+ }
+}
+
+
+void X86AsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
+ PrintPICBaseSymbol();
+ O << '\n';
+ PrintPICBaseSymbol();
+ O << ':';
+}
+
+void X86AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
+ const MachineBasicBlock *MBB,
+ unsigned uid) const {
+ const char *JTEntryDirective = MJTI->getEntrySize(*TM.getTargetData()) == 4 ?
+ MAI->getData32bitsDirective() : MAI->getData64bitsDirective();
+
+ O << JTEntryDirective << ' ';
+
+ if (Subtarget->isPICStyleRIPRel() || Subtarget->isPICStyleStubPIC()) {
+ O << *GetJTSetSymbol(uid, MBB->getNumber());
+ } else if (Subtarget->isPICStyleGOT())
+ O << *GetMBBSymbol(MBB->getNumber()) << "@GOTOFF";
+ else // mdynamic-no-pic
+ O << *GetMBBSymbol(MBB->getNumber());
+ O << '\n';
+}
+
+bool X86AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode) {
+ unsigned Reg = MO.getReg();
+ switch (Mode) {
+ default: return true; // Unknown mode.
+ case 'b': // Print QImode register
+ Reg = getX86SubSuperRegister(Reg, MVT::i8);
+ break;
+ case 'h': // Print QImode high register
+ Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
+ break;
+ case 'w': // Print HImode register
+ Reg = getX86SubSuperRegister(Reg, MVT::i16);
+ break;
+ case 'k': // Print SImode register
+ Reg = getX86SubSuperRegister(Reg, MVT::i32);
+ break;
+ case 'q': // Print DImode register
+ Reg = getX86SubSuperRegister(Reg, MVT::i64);
+ break;
+ }
+
+ O << '%' << X86ATTInstPrinter::getRegisterName(Reg);
+ return false;
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ // Does this asm operand have a single letter operand modifier?
+ if (ExtraCode && ExtraCode[0]) {
+ if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+ const MachineOperand &MO = MI->getOperand(OpNo);
+
+ switch (ExtraCode[0]) {
+ default: return true; // Unknown modifier.
+ case 'a': // This is an address. Currently only 'i' and 'r' are expected.
+ if (MO.isImm()) {
+ O << MO.getImm();
+ return false;
+ }
+ if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) {
+ printSymbolOperand(MO);
+ return false;
+ }
+ if (MO.isReg()) {
+ O << '(';
+ printOperand(MI, OpNo);
+ O << ')';
+ return false;
+ }
+ return true;
+
+ case 'c': // Don't print "$" before a global var name or constant.
+ if (MO.isImm())
+ O << MO.getImm();
+ else if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol())
+ printSymbolOperand(MO);
+ else
+ printOperand(MI, OpNo);
+ return false;
+
+ case 'A': // Print '*' before a register (it must be a register)
+ if (MO.isReg()) {
+ O << '*';
+ printOperand(MI, OpNo);
+ return false;
+ }
+ return true;
+
+ case 'b': // Print QImode register
+ case 'h': // Print QImode high register
+ case 'w': // Print HImode register
+ case 'k': // Print SImode register
+ case 'q': // Print DImode register
+ if (MO.isReg())
+ return printAsmMRegister(MO, ExtraCode[0]);
+ printOperand(MI, OpNo);
+ return false;
+
+ case 'P': // This is the operand of a call, treat specially.
+ print_pcrel_imm(MI, OpNo);
+ return false;
+
+ case 'n': // Negate the immediate or print a '-' before the operand.
+ // Note: this is a temporary solution. It should be handled target
+ // independently as part of the 'MC' work.
+ if (MO.isImm()) {
+ O << -MO.getImm();
+ return false;
+ }
+ O << '-';
+ }
+ }
+
+ printOperand(MI, OpNo);
+ return false;
+}
+
+bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo, unsigned AsmVariant,
+ const char *ExtraCode) {
+ if (ExtraCode && ExtraCode[0]) {
+ if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+ switch (ExtraCode[0]) {
+ default: return true; // Unknown modifier.
+ case 'b': // Print QImode register
+ case 'h': // Print QImode high register
+ case 'w': // Print HImode register
+ case 'k': // Print SImode register
+ case 'q': // Print SImode register
+ // These only apply to registers, ignore on mem.
+ break;
+ case 'P': // Don't print @PLT, but do print as memory.
+ printMemReference(MI, OpNo, "no-rip");
+ return false;
+ }
+ }
+ printMemReference(MI, OpNo);
+ return false;
+}
+
+
+
+/// printMachineInstruction -- Print out a single X86 LLVM instruction MI in
+/// AT&T syntax to the current output stream.
+///
+void X86AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
+ ++EmittedInsts;
+
+ processDebugLoc(MI, true);
+
+ printInstructionThroughMCStreamer(MI);
+
+ if (VerboseAsm)
+ EmitComments(*MI);
+ O << '\n';
+
+ processDebugLoc(MI, false);
+}
+
+void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
+ if (Subtarget->isTargetDarwin()) {
+ // All darwin targets use mach-o.
+ TargetLoweringObjectFileMachO &TLOFMacho =
+ static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
+
+ MachineModuleInfoMachO &MMIMacho =
+ MMI->getObjFileInfo<MachineModuleInfoMachO>();
+
+ // Output stubs for dynamically-linked functions.
+ MachineModuleInfoMachO::SymbolListTy Stubs;
+
+ Stubs = MMIMacho.GetFnStubList();
+ if (!Stubs.empty()) {
+ const MCSection *TheSection =
+ TLOFMacho.getMachOSection("__IMPORT", "__jump_table",
+ MCSectionMachO::S_SYMBOL_STUBS |
+ MCSectionMachO::S_ATTR_SELF_MODIFYING_CODE |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ 5, SectionKind::getMetadata());
+ OutStreamer.SwitchSection(TheSection);
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ O << *Stubs[i].first << ":\n";
+ // Get the MCSymbol without the $stub suffix.
+ O << "\t.indirect_symbol " << *Stubs[i].second;
+ O << "\n\thlt ; hlt ; hlt ; hlt ; hlt\n";
+ }
+ O << '\n';
+
+ Stubs.clear();
+ }
+
+ // Output stubs for external and common global variables.
+ Stubs = MMIMacho.GetGVStubList();
+ if (!Stubs.empty()) {
+ const MCSection *TheSection =
+ TLOFMacho.getMachOSection("__IMPORT", "__pointers",
+ MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+ OutStreamer.SwitchSection(TheSection);
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ O << *Stubs[i].first << ":\n\t.indirect_symbol " << *Stubs[i].second;
+ O << "\n\t.long\t0\n";
+ }
+ Stubs.clear();
+ }
+
+ Stubs = MMIMacho.GetHiddenGVStubList();
+ if (!Stubs.empty()) {
+ OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
+ EmitAlignment(2);
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ O << *Stubs[i].first << ":\n" << MAI->getData32bitsDirective();
+ O << *Stubs[i].second << '\n';
+ }
+ Stubs.clear();
+ }
+
+ // Funny Darwin hack: This flag tells the linker that no global symbols
+ // contain code that falls through to other global symbols (e.g. the obvious
+ // implementation of multiple entry points). If this doesn't occur, the
+ // linker can safely perform dead code stripping. Since LLVM never
+ // generates code that does this, it is always safe to set.
+ OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
+ }
+
+ if (Subtarget->isTargetCOFF()) {
+ X86COFFMachineModuleInfo &COFFMMI =
+ MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
+
+ // Emit type information for external functions
+ for (X86COFFMachineModuleInfo::stub_iterator I = COFFMMI.stub_begin(),
+ E = COFFMMI.stub_end(); I != E; ++I) {
+ O << "\t.def\t " << I->getKeyData()
+ << ";\t.scl\t" << COFF::C_EXT
+ << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
+ << ";\t.endef\n";
+ }
+
+ if (Subtarget->isTargetCygMing()) {
+ // Necessary for dllexport support
+ std::vector<const MCSymbol*> DLLExportedFns, DLLExportedGlobals;
+
+ TargetLoweringObjectFileCOFF &TLOFCOFF =
+ static_cast<TargetLoweringObjectFileCOFF&>(getObjFileLowering());
+
+ for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
+ if (I->hasDLLExportLinkage()) {
+ MCSymbol *Sym = GetGlobalValueSymbol(I);
+ COFFMMI.DecorateCygMingName(Sym, OutContext, I, *TM.getTargetData());
+ DLLExportedFns.push_back(Sym);
+ }
+
+ for (Module::const_global_iterator I = M.global_begin(),
+ E = M.global_end(); I != E; ++I)
+ if (I->hasDLLExportLinkage())
+ DLLExportedGlobals.push_back(GetGlobalValueSymbol(I));
+
+ // Output linker support code for dllexported globals on windows.
+ if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) {
+ OutStreamer.SwitchSection(TLOFCOFF.getCOFFSection(".section .drectve",
+ true,
+ SectionKind::getMetadata()));
+ for (unsigned i = 0, e = DLLExportedGlobals.size(); i != e; ++i)
+ O << "\t.ascii \" -export:" << *DLLExportedGlobals[i] << ",data\"\n";
+
+ for (unsigned i = 0, e = DLLExportedFns.size(); i != e; ++i)
+ O << "\t.ascii \" -export:" << *DLLExportedFns[i] << "\"\n";
+ }
+ }
+ }
+}
+
+
+//===----------------------------------------------------------------------===//
+// Target Registry Stuff
+//===----------------------------------------------------------------------===//
+
+static MCInstPrinter *createX86MCInstPrinter(const Target &T,
+ unsigned SyntaxVariant,
+ const MCAsmInfo &MAI,
+ raw_ostream &O) {
+ if (SyntaxVariant == 0)
+ return new X86ATTInstPrinter(O, MAI);
+ if (SyntaxVariant == 1)
+ return new X86IntelInstPrinter(O, MAI);
+ return 0;
+}
-// Force static initialization when called from
-// llvm/InitializeAllAsmPrinters.h
-namespace llvm {
- void InitializeX86AsmPrinter() { }
+// Force static initialization.
+extern "C" void LLVMInitializeX86AsmPrinter() {
+ RegisterAsmPrinter<X86AsmPrinter> X(TheX86_32Target);
+ RegisterAsmPrinter<X86AsmPrinter> Y(TheX86_64Target);
+
+ TargetRegistry::RegisterMCInstPrinter(TheX86_32Target,createX86MCInstPrinter);
+ TargetRegistry::RegisterMCInstPrinter(TheX86_64Target,createX86MCInstPrinter);
}
projects / oota-llvm.git / blobdiff