-//===-- 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 X86 machine code.
//
//===----------------------------------------------------------------------===//
#include "X86AsmPrinter.h"
-#include "X86ATTAsmPrinter.h"
-#include "X86COFF.h"
-#include "X86IntelAsmPrinter.h"
+#include "InstPrinter/X86ATTInstPrinter.h"
+#include "MCTargetDesc/X86BaseInfo.h"
+#include "X86InstrInfo.h"
#include "X86MachineFunctionInfo.h"
-#include "X86Subtarget.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/CallingConv.h"
-#include "llvm/Constants.h"
-#include "llvm/Module.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/ParameterAttributes.h"
-#include "llvm/Type.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetOptions.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;
-static X86MachineFunctionInfo calculateFunctionInfo(const Function *F,
- const TargetData *TD) {
- X86MachineFunctionInfo Info;
- uint64_t Size = 0;
-
- switch (F->getCallingConv()) {
- case CallingConv::X86_StdCall:
- Info.setDecorationStyle(StdCall);
- break;
- case CallingConv::X86_FastCall:
- Info.setDecorationStyle(FastCall);
- break;
- default:
- return Info;
- }
+//===----------------------------------------------------------------------===//
+// Primitive Helper Functions.
+//===----------------------------------------------------------------------===//
- unsigned argNum = 1;
- for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
- AI != AE; ++AI, ++argNum) {
- const Type* Ty = AI->getType();
+/// runOnMachineFunction - Emit the function body.
+///
+bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ 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();
+ }
- // 'Dereference' type in case of byval parameter attribute
- if (F->paramHasAttr(argNum, ParamAttr::ByVal))
- Ty = cast<PointerType>(Ty)->getElementType();
+ // Have common code print out the function header with linkage info etc.
+ EmitFunctionHeader();
- // Size should be aligned to DWORD boundary
- Size += ((TD->getABITypeSize(Ty) + 3)/4)*4;
- }
+ // Emit the rest of the function body.
+ EmitFunctionBody();
- // We're not supporting tooooo huge arguments :)
- Info.setBytesToPopOnReturn((unsigned int)Size);
- return Info;
+ // 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:
+ O << *P.GetCPISymbol(MO.getIndex());
+ 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, "$stub");
+ MachineModuleInfoImpl::StubValueTy &StubSym =
+ P.MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
+ if (!StubSym.getPointer())
+ StubSym = MachineModuleInfoImpl::
+ StubValueTy(P.getSymbol(GV), !GV->hasInternalLinkage());
+ }
-/// decorateName - Query FunctionInfoMap and use this information for various
-/// name decoration.
-void X86SharedAsmPrinter::decorateName(std::string &Name,
- const GlobalValue *GV) {
- const Function *F = dyn_cast<Function>(GV);
- if (!F) return;
+ // If the name begins with a dollar-sign, enclose it in parens. We do this
+ // to avoid having it look like an integer immediate to the assembler.
+ if (GVSym->getName()[0] != '$')
+ O << *GVSym;
+ else
+ O << '(' << *GVSym << ')';
+ P.printOffset(MO.getOffset(), O);
+ break;
+ }
+ }
- // 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)
+ 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() << ']';
+ 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();
+ 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();
+ 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;
+ }
+}
- // Decorate names only when we're targeting Cygwin/Mingw32 targets
- if (!Subtarget->isTargetCygMing())
+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) {
+ 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 X86MachineFunctionInfo *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;
}
-
- const FunctionType *FT = F->getFunctionType();
- switch (Info->getDecorationStyle()) {
- case None:
- break;
- case StdCall:
- // "Pure" variadic functions do not receive @0 suffix.
- if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
- (FT->getNumParams() == 1 && F->hasStructRetAttr()))
- Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
- break;
- case FastCall:
- // "Pure" variadic functions do not receive @0 suffix.
- if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
- (FT->getNumParams() == 1 && F->hasStructRetAttr()))
- Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
-
- if (Name[0] == '_') {
- Name[0] = '@';
- } else {
- Name = '@' + Name;
- }
+
+ 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;
- default:
- assert(0 && "Unsupported DecorationStyle");
+ }
}
}
-/// doInitialization
-bool X86SharedAsmPrinter::doInitialization(Module &M) {
- if (TAI->doesSupportDebugInformation()) {
- // Emit initial debug information.
- DW.BeginModule(&M);
+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);
}
- bool Result = AsmPrinter::doInitialization(M);
+ if (Modifier && strcmp(Modifier, "H") == 0)
+ O << "+8";
- // Darwin wants symbols to be quoted if they have complex names.
- if (Subtarget->isTargetDarwin())
- Mang->setUseQuotes(true);
+ if (HasParenPart) {
+ assert(IndexReg.getReg() != X86::ESP &&
+ "X86 doesn't allow scaling by ESP");
- return Result;
+ 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 << ')';
+ }
}
-/// PrintUnmangledNameSafely - Print out the printable characters in the name.
-/// Don't print things like \n or \0.
-static void PrintUnmangledNameSafely(const Value *V, std::ostream &OS) {
- for (const char *Name = V->getNameStart(), *E = Name+V->getNameLen();
- Name != E; ++Name)
- if (isprint(*Name))
- OS << *Name;
+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);
}
-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();
-
- // 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)) {
- if (Subtarget->isTargetDarwin() &&
- TM.getRelocationModel() == Reloc::Static) {
- if (I->getName() == "llvm.global_ctors")
- O << ".reference .constructors_used\n";
- else if (I->getName() == "llvm.global_dtors")
- O << ".reference .destructors_used\n";
- }
- continue;
- }
-
- std::string name = Mang->getValueName(I);
- Constant *C = I->getInitializer();
- const Type *Type = C->getType();
- unsigned Size = TD->getABITypeSize(Type);
- unsigned Align = TD->getPreferredAlignmentLog(I);
-
- if (I->hasHiddenVisibility()) {
- if (const char *Directive = TAI->getHiddenDirective())
- O << Directive << name << "\n";
- } else if (I->hasProtectedVisibility()) {
- if (const char *Directive = TAI->getProtectedDirective())
- O << Directive << name << "\n";
- }
-
- if (Subtarget->isTargetELF())
- O << "\t.type\t" << name << ",@object\n";
-
- if (C->isNullValue() && !I->hasSection()) {
- if (I->hasExternalLinkage()) {
- if (const char *Directive = TAI->getZeroFillDirective()) {
- O << "\t.globl " << name << "\n";
- O << Directive << "__DATA, __common, " << name << ", "
- << Size << ", " << Align << "\n";
- continue;
- }
- }
-
- if (!I->isThreadLocal() &&
- (I->hasInternalLinkage() || I->hasWeakLinkage() ||
- I->hasLinkOnceLinkage() || I->hasCommonLinkage())) {
- 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;
-
- // Leopard and above support aligned common symbols.
- if (Subtarget->getDarwinVers() >= 9)
- O << "," << Align;
- }
- } 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);
+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 << "\t\t" << TAI->getCommentString() << " ";
- PrintUnmangledNameSafely(I, O);
- O << "\n";
- continue;
}
+ 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, 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 64-bit register names if 64-bit integer registers are available.
+ // Otherwise, print 32-bit register names.
+ MVT::SimpleValueType Ty = P.getSubtarget().is64Bit() ? MVT::i64 : MVT::i32;
+ Reg = getX86SubSuperRegister(Reg, Ty);
+ break;
+ }
- switch (I->getLinkage()) {
- case GlobalValue::CommonLinkage:
- case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage:
- if (Subtarget->isTargetDarwin()) {
- O << "\t.globl " << name << "\n"
- << TAI->getWeakDefDirective() << name << "\n";
- SwitchToDataSection("\t.section __DATA,__datacoal_nt,coalesced", I);
- } else if (Subtarget->isTargetCygMing()) {
- std::string SectionName(".section\t.data$linkonce." +
- name +
- ",\"aw\"");
- SwitchToDataSection(SectionName.c_str(), I);
- O << "\t.globl\t" << 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\t" << name << "\n";
+ 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;
}
- break;
- case GlobalValue::DLLExportLinkage:
- DLLExportedGVs.insert(Mang->makeNameProper(I->getName(),""));
- // FALL THROUGH
- 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: {
- if (I->isConstant()) {
- const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
- if (TAI->getCStringSection() && CVA && CVA->isCString()) {
- SwitchToDataSection(TAI->getCStringSection(), I);
- break;
- }
+
+ 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;
}
- // 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 (I->hasSection() && Subtarget->isTargetDarwin()) {
- // Honor all section names on Darwin; ObjC uses this
- std::string SectionName = ".section " + I->getSection();
- SwitchToDataSection(SectionName.c_str());
- } else {
- if (C->isNullValue() && !NoZerosInBSS && TAI->getBSSSection())
- SwitchToDataSection(I->isThreadLocal() ? TAI->getTLSBSSSection() :
- TAI->getBSSSection(), I);
- else if (!I->isConstant())
- SwitchToDataSection(I->isThreadLocal() ? TAI->getTLSDataSection() :
- TAI->getDataSection(), I);
- else if (I->isThreadLocal())
- SwitchToDataSection(TAI->getTLSDataSection());
- else {
- // Read-only data.
- bool HasReloc = C->ContainsRelocations();
- if (HasReloc &&
- Subtarget->isTargetDarwin() &&
- TM.getRelocationModel() != Reloc::Static)
- SwitchToDataSection("\t.const_data\n");
- else if (!HasReloc && Size == 4 &&
- TAI->getFourByteConstantSection())
- SwitchToDataSection(TAI->getFourByteConstantSection(), I);
- else if (!HasReloc && Size == 8 &&
- TAI->getEightByteConstantSection())
- SwitchToDataSection(TAI->getEightByteConstantSection(), I);
- else if (!HasReloc && Size == 16 &&
- TAI->getSixteenByteConstantSection())
- SwitchToDataSection(TAI->getSixteenByteConstantSection(), I);
- else if (TAI->getReadOnlySection())
- SwitchToDataSection(TAI->getReadOnlySection(), I);
- else
- SwitchToDataSection(TAI->getDataSection(), I);
- }
+ return false;
+
+ case 'A': // Print '*' before a register (it must be a register)
+ if (MO.isReg()) {
+ O << '*';
+ printOperand(*this, MI, OpNo, O);
+ return false;
}
-
- break;
- }
- default:
- assert(0 && "Unknown linkage type!");
+ 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 << '-';
}
-
- EmitAlignment(Align, I);
- O << name << ":\t\t\t\t" << TAI->getCommentString() << " ";
- PrintUnmangledNameSafely(I, O);
- O << "\n";
- if (TAI->hasDotTypeDotSizeDirective())
- O << "\t.size\t" << 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);
}
-
- // Output linker support code for dllexported globals
- if (!DLLExportedGVs.empty()) {
- SwitchToDataSection(".section .drectve");
+
+ 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;
}
- for (std::set<std::string>::iterator i = DLLExportedGVs.begin(),
- e = DLLExportedGVs.end();
- i != e; ++i) {
- O << "\t.ascii \" -export:" << *i << ",data\"\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(*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;
+}
- if (!DLLExportedFns.empty()) {
- SwitchToDataSection(".section .drectve");
+void X86AsmPrinter::EmitStartOfAsmFile(Module &M) {
+ if (Subtarget->isTargetMacho())
+ OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
+
+ if (Subtarget->isTargetCOFF()) {
+ // Emit an absolute @feat.00 symbol. This appears to be some kind of
+ // compiler features bitfield read by link.exe.
+ if (!Subtarget->is64Bit()) {
+ 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.
+ S->setAbsolute();
+ OutStreamer.EmitSymbolAttribute(S, MCSA_Global);
+ OutStreamer.EmitAssignment(
+ S, MCConstantExpr::Create(int64_t(1), MMI->getContext()));
+ }
}
+}
- 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("\t.section __IMPORT,__jump_table,symbol_stubs,"
- "self_modifying_code+pure_instructions,5", 0);
- O << "L" << *i << "$stub:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\thlt ; hlt ; hlt ; hlt ; hlt\n";
+static void
+emitNonLazySymbolPointer(MCStreamer &OutStreamer, MCSymbol *StubLabel,
+ MachineModuleInfoImpl::StubValueTy &MCSym) {
+ // L_foo$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()) {
+ SectionKind Kind = CPE.getSectionKind(TM.getDataLayout());
+ const Constant *C = CPE.Val.ConstVal;
+ const MCSectionCOFF *S = cast<MCSectionCOFF>(
+ getObjFileLowering().getSectionForConstant(Kind, C));
+ if (MCSymbol *Sym = S->getCOMDATSymbol()) {
+ if (Sym->isUndefined())
+ OutStreamer.EmitSymbolAttribute(Sym, MCSA_Global);
+ return Sym;
+ }
}
+ }
+
+ return AsmPrinter::GetCPISymbol(CPID);
+}
+
+void X86AsmPrinter::GenerateExportDirective(const MCSymbol *Sym, bool IsData) {
+ SmallString<128> Directive;
+ raw_svector_ostream OS(Directive);
+ StringRef Name = Sym->getName();
+
+ if (Subtarget->isTargetKnownWindowsMSVC())
+ OS << " /EXPORT:";
+ else
+ OS << " -export:";
- O << "\n";
+ if ((Subtarget->isTargetWindowsGNU() || Subtarget->isTargetWindowsCygwin()) &&
+ (Name[0] == getDataLayout().getGlobalPrefix()))
+ Name = Name.drop_front();
- if (TAI->doesSupportExceptionHandling() && MMI && !Subtarget->is64Bit()) {
- // Add the (possibly multiple) personalities to the set of global values.
- // Only referenced functions get into the Personalities list.
- const std::vector<Function *>& Personalities = MMI->getPersonalities();
+ OS << Name;
- for (std::vector<Function *>::const_iterator I = Personalities.begin(),
- E = Personalities.end(); I != E; ++I)
- if (*I) GVStubs.insert("_" + (*I)->getName());
+ if (IsData) {
+ if (Subtarget->isTargetKnownWindowsMSVC())
+ OS << ",DATA";
+ else
+ OS << ",data";
+ }
+
+ OS.flush();
+ OutStreamer.EmitBytes(Directive);
+}
+
+void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
+ if (Subtarget->isTargetMacho()) {
+ // 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",
+ 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$stub:
+ OutStreamer.EmitLabel(Stub.first);
+ // .indirect_symbol _foo
+ OutStreamer.EmitSymbolAttribute(Stub.second.getPointer(),
+ MCSA_IndirectSymbol);
+ // hlt; hlt; hlt; hlt; hlt hlt = 0xf4.
+ const char HltInsts[] = "\xf4\xf4\xf4\xf4\xf4";
+ OutStreamer.EmitBytes(StringRef(HltInsts, 5));
+ }
+
+ Stubs.clear();
+ OutStreamer.AddBlankLine();
}
// Output stubs for external and common global variables.
- if (!GVStubs.empty())
- SwitchToDataSection(
- "\t.section __IMPORT,__pointers,non_lazy_symbol_pointers");
- for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
- i != e; ++i) {
- O << "L" << *i << "$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",
+ 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();
}
- // Emit final debug information.
- DW.EndModule();
+ Stubs = MMIMacho.GetHiddenGVStubList();
+ if (!Stubs.empty()) {
+ const 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();
// 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()) {
- // 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";
+ OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
+ }
+
+ if (Subtarget->isTargetKnownWindowsMSVC() && MMI->usesVAFloatArgument()) {
+ StringRef SymbolName = Subtarget->is64Bit() ? "_fltused" : "__fltused";
+ MCSymbol *S = MMI->getContext().GetOrCreateSymbol(SymbolName);
+ OutStreamer.EmitSymbolAttribute(S, MCSA_Global);
+ }
+
+ if (Subtarget->isTargetCOFF()) {
+ // Necessary for dllexport support
+ std::vector<const MCSymbol*> DLLExportedFns, DLLExportedGlobals;
+
+ for (const auto &Function : M)
+ if (Function.hasDLLExportStorageClass())
+ DLLExportedFns.push_back(getSymbol(&Function));
+
+ for (const auto &Global : M.globals())
+ if (Global.hasDLLExportStorageClass())
+ DLLExportedGlobals.push_back(getSymbol(&Global));
+
+ for (const auto &Alias : M.aliases()) {
+ if (!Alias.hasDLLExportStorageClass())
+ continue;
+
+ if (Alias.getType()->getElementType()->isFunctionTy())
+ DLLExportedFns.push_back(getSymbol(&Alias));
+ else
+ DLLExportedGlobals.push_back(getSymbol(&Alias));
+ }
+
+ // Output linker support code for dllexported globals on windows.
+ if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) {
+ const TargetLoweringObjectFileCOFF &TLOFCOFF =
+ static_cast<const TargetLoweringObjectFileCOFF&>(getObjFileLowering());
+
+ OutStreamer.SwitchSection(TLOFCOFF.getDrectveSection());
+
+ for (auto & Symbol : DLLExportedGlobals)
+ GenerateExportDirective(Symbol, /*IsData=*/true);
+ for (auto & Symbol : DLLExportedFns)
+ GenerateExportDirective(Symbol, /*IsData=*/false);
}
-
- // Emit final debug information.
- DW.EndModule();
- } else if (Subtarget->isTargetELF()) {
- // Emit final debug information.
- DW.EndModule();
}
- return AsmPrinter::doFinalization(M);
-}
+ if (Subtarget->isTargetELF()) {
+ const TargetLoweringObjectFileELF &TLOFELF =
+ static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
-/// 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>();
+ MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
- if (Subtarget->isFlavorIntel()) {
- return new X86IntelAsmPrinter(o, tm, tm.getTargetAsmInfo());
- } else {
- return new X86ATTAsmPrinter(o, tm, tm.getTargetAsmInfo());
+ // 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 (const auto &Stub : Stubs) {
+ OutStreamer.EmitLabel(Stub.first);
+ OutStreamer.EmitSymbolValue(Stub.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);
+}
projects / oota-llvm.git / blobdiff