#define DEBUG_TYPE "asm-printer"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/CodeGen/GCMetadataPrinter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormattedStream.h"
#include <cerrno>
using namespace llvm;
STATISTIC(EmittedInsts, "Number of machine instrs printed");
char AsmPrinter::ID = 0;
AsmPrinter::AsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
MCStreamer &Streamer)
: MachineFunctionPass(&ID), O(o),
TM(tm), MAI(tm.getMCAsmInfo()), TRI(tm.getRegisterInfo()),
OutContext(Streamer.getContext()),
OutStreamer(Streamer),
LastMI(0), LastFn(0), Counter(~0U), SetCounter(0) {
DW = 0; MMI = 0;
VerboseAsm = Streamer.isVerboseAsm();
}
AsmPrinter::~AsmPrinter() {
for (gcp_iterator I = GCMetadataPrinters.begin(),
E = GCMetadataPrinters.end(); I != E; ++I)
delete I->second;
delete &OutStreamer;
}
unsigned AsmPrinter::getFunctionNumber() const {
return MF->getFunctionNumber();
}
TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
return TM.getTargetLowering()->getObjFileLowering();
}
const MCSection *AsmPrinter::getCurrentSection() const {
return OutStreamer.getCurrentSection();
}
void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
MachineFunctionPass::getAnalysisUsage(AU);
AU.addRequired<MachineModuleInfo>();
AU.addRequired<GCModuleInfo>();
if (VerboseAsm)
AU.addRequired<MachineLoopInfo>();
}
bool AsmPrinter::doInitialization(Module &M) {
MMI = getAnalysisIfAvailable<MachineModuleInfo>();
MMI->AnalyzeModule(M);
const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
.Initialize(OutContext, TM);
Mang = new Mangler(OutContext, *TM.getTargetData());
EmitStartOfAsmFile(M);
if (MAI->hasSingleParameterDotFile()) {
OutStreamer.EmitFileDirective(M.getModuleIdentifier());
}
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
assert(MI && "AsmPrinter didn't require GCModuleInfo?");
for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
MP->beginAssembly(O, *this, *MAI);
if (!M.getModuleInlineAsm().empty())
O << MAI->getCommentString() << " Start of file scope inline assembly\n"
<< M.getModuleInlineAsm()
<< '\n' << MAI->getCommentString()
<< " End of file scope inline assembly\n";
DW = getAnalysisIfAvailable<DwarfWriter>();
if (DW)
DW->BeginModule(&M, MMI, O, this, MAI);
return false;
}
void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const {
switch ((GlobalValue::LinkageTypes)Linkage) {
case GlobalValue::CommonLinkage:
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
case GlobalValue::LinkerPrivateWeakLinkage:
if (MAI->getWeakDefDirective() != 0) {
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
} else if (const char *LinkOnce = MAI->getLinkOnceDirective()) {
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
O << LinkOnce;
} else {
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak);
}
break;
case GlobalValue::DLLExportLinkage:
case GlobalValue::AppendingLinkage:
case GlobalValue::ExternalLinkage:
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
break;
case GlobalValue::PrivateLinkage:
case GlobalValue::InternalLinkage:
case GlobalValue::LinkerPrivateLinkage:
break;
default:
llvm_unreachable("Unknown linkage type!");
}
}
void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
if (!GV->hasInitializer()) return;
if (EmitSpecialLLVMGlobal(GV))
return;
MCSymbol *GVSym = Mang->getSymbol(GV);
EmitVisibility(GVSym, GV->getVisibility());
if (MAI->hasDotTypeDotSizeDirective())
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject);
SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM);
const TargetData *TD = TM.getTargetData();
unsigned Size = TD->getTypeAllocSize(GV->getType()->getElementType());
unsigned AlignLog = TD->getPreferredAlignmentLog(GV);
if (GVKind.isCommon() || GVKind.isBSSLocal()) {
if (Size == 0) Size = 1;
if (VerboseAsm) {
WriteAsOperand(OutStreamer.GetCommentOS(), GV,
false, GV->getParent());
OutStreamer.GetCommentOS() << '\n';
}
if (GVKind.isCommon()) {
OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog);
return;
}
if (MAI->hasMachoZeroFillDirective()) {
const MCSection *TheSection =
getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM);
OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
return;
}
if (MAI->hasLCOMMDirective()) {
OutStreamer.EmitLocalCommonSymbol(GVSym, Size);
return;
}
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local);
OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog);
return;
}
const MCSection *TheSection =
getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM);
if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) {
if (Size == 0) Size = 1;
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
return;
}
OutStreamer.SwitchSection(TheSection);
EmitLinkage(GV->getLinkage(), GVSym);
EmitAlignment(AlignLog, GV);
if (VerboseAsm) {
WriteAsOperand(OutStreamer.GetCommentOS(), GV,
false, GV->getParent());
OutStreamer.GetCommentOS() << '\n';
}
OutStreamer.EmitLabel(GVSym);
EmitGlobalConstant(GV->getInitializer());
if (MAI->hasDotTypeDotSizeDirective())
OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext));
OutStreamer.AddBlankLine();
}
void AsmPrinter::EmitFunctionHeader() {
EmitConstantPool();
const Function *F = MF->getFunction();
OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
EmitVisibility(CurrentFnSym, F->getVisibility());
EmitLinkage(F->getLinkage(), CurrentFnSym);
EmitAlignment(MF->getAlignment(), F);
if (MAI->hasDotTypeDotSizeDirective())
OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction);
if (VerboseAsm) {
WriteAsOperand(OutStreamer.GetCommentOS(), F,
false, F->getParent());
OutStreamer.GetCommentOS() << '\n';
}
EmitFunctionEntryLabel();
std::vector<MCSymbol*> DeadBlockSyms;
MMI->takeDeletedSymbolsForFunction(F, DeadBlockSyms);
for (unsigned i = 0, e = DeadBlockSyms.size(); i != e; ++i) {
OutStreamer.AddComment("Address taken block that was later removed");
OutStreamer.EmitLabel(DeadBlockSyms[i]);
}
if (MAI->getLinkOnceDirective() != 0 &&
(F->hasLinkOnceLinkage() || F->hasWeakLinkage()))
O << "Lllvm$workaround$fake$stub$" << *CurrentFnSym << ":\n";
if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
DW->BeginFunction(MF);
}
void AsmPrinter::EmitFunctionEntryLabel() {
OutStreamer.EmitLabel(CurrentFnSym);
}
static void EmitComments(const MachineInstr &MI, raw_ostream &CommentOS) {
const MachineFunction *MF = MI.getParent()->getParent();
const TargetMachine &TM = MF->getTarget();
DebugLoc DL = MI.getDebugLoc();
if (!DL.isUnknown()) { DIScope Scope(DL.getScope(MF->getFunction()->getContext()));
if (Scope.Verify())
CommentOS << Scope.getFilename();
else
CommentOS << "<unknown>";
CommentOS << ':' << DL.getLine();
if (DL.getCol() != 0)
CommentOS << ':' << DL.getCol();
CommentOS << '\n';
}
int FI;
const MachineFrameInfo *FrameInfo = MF->getFrameInfo();
const MachineMemOperand *MMO;
if (TM.getInstrInfo()->isLoadFromStackSlotPostFE(&MI, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI)) {
MMO = *MI.memoperands_begin();
CommentOS << MMO->getSize() << "-byte Reload\n";
}
} else if (TM.getInstrInfo()->hasLoadFromStackSlot(&MI, MMO, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI))
CommentOS << MMO->getSize() << "-byte Folded Reload\n";
} else if (TM.getInstrInfo()->isStoreToStackSlotPostFE(&MI, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI)) {
MMO = *MI.memoperands_begin();
CommentOS << MMO->getSize() << "-byte Spill\n";
}
} else if (TM.getInstrInfo()->hasStoreToStackSlot(&MI, MMO, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI))
CommentOS << MMO->getSize() << "-byte Folded Spill\n";
}
unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
if (TM.getInstrInfo()->isMoveInstr(MI, SrcReg, DstReg,
SrcSubIdx, DstSubIdx)) {
if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse))
CommentOS << " Reload Reuse\n";
}
}
static bool EmitDebugValueComment(const MachineInstr *MI, AsmPrinter &AP) {
char buf[100];
std::string Str = "\t";
Str += AP.MAI->getCommentString();
Str += "DEBUG_VALUE: ";
if (MI->getNumOperands() != 3)
return false;
DIVariable V((MDNode*)(MI->getOperand(2).getMetadata()));
if (V.getContext().isSubprogram()) {
Str += DISubprogram(V.getContext().getNode()).getDisplayName();
Str += ":";
}
Str += V.getName();
Str += " <- ";
if (MI->getOperand(0).isFPImm()) {
APFloat APF = APFloat(MI->getOperand(0).getFPImm()->getValueAPF());
if (MI->getOperand(0).getFPImm()->getType()->isFloatTy()) {
sprintf(buf, "%e", APF.convertToFloat());
Str += buf;
} else if (MI->getOperand(0).getFPImm()->getType()->isDoubleTy()) {
sprintf(buf, "%e", APF.convertToDouble());
Str += buf;
} else {
bool ignored;
APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
&ignored);
Str += "(long double) ";
sprintf(buf, "%e", APF.convertToDouble());
Str += buf;
}
} else if (MI->getOperand(0).isImm()) {
sprintf(buf, "%lld", MI->getOperand(0).getImm());
Str += buf;
} else if (MI->getOperand(0).isReg()) {
if (MI->getOperand(0).getReg() == 0) {
Str += "undef";
AP.OutStreamer.EmitRawText(Twine(Str));
return true;
}
Str += AP.TM.getRegisterInfo()->getName(MI->getOperand(0).getReg());
} else
llvm_unreachable("Unknown operand type");
Str += '+';
sprintf(buf, "%lld", MI->getOperand(1).getImm());
Str += buf;
AP.OutStreamer.EmitRawText(Twine(Str));
return true;
}
void AsmPrinter::EmitFunctionBody() {
EmitFunctionBodyStart();
bool HasAnyRealCode = false;
const MachineInstr *LastMI = 0;
for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
I != E; ++I) {
EmitBasicBlockStart(I);
for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
II != IE; ++II) {
LastMI = II;
if (!II->isLabel() && !II->isImplicitDef() && !II->isKill() &&
!II->isDebugValue()) {
HasAnyRealCode = true;
++EmittedInsts;
}
processDebugLoc(II, true);
if (VerboseAsm)
EmitComments(*II, OutStreamer.GetCommentOS());
switch (II->getOpcode()) {
case TargetOpcode::PROLOG_LABEL:
case TargetOpcode::EH_LABEL:
case TargetOpcode::GC_LABEL:
printLabelInst(II);
break;
case TargetOpcode::INLINEASM:
printInlineAsm(II);
break;
case TargetOpcode::DBG_VALUE:
if (VerboseAsm) {
if (!EmitDebugValueComment(II, *this))
EmitInstruction(II);
}
break;
case TargetOpcode::IMPLICIT_DEF:
printImplicitDef(II);
break;
case TargetOpcode::KILL:
printKill(II);
break;
default:
EmitInstruction(II);
break;
}
processDebugLoc(II, false);
}
}
bool RequiresNoop = LastMI && LastMI->getOpcode()==TargetOpcode::PROLOG_LABEL;
if ((MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode) || RequiresNoop)
OutStreamer.EmitIntValue(0, 1, 0);
EmitFunctionBodyEnd();
if (MAI->hasDotTypeDotSizeDirective())
O << "\t.size\t" << *CurrentFnSym << ", .-" << *CurrentFnSym << '\n';
if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
DW->EndFunction(MF);
EmitJumpTableInfo();
OutStreamer.AddBlankLine();
}
MachineLocation AsmPrinter::getDebugValueLocation(const MachineInstr *MI) const {
return MachineLocation();
}
bool AsmPrinter::doFinalization(Module &M) {
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
EmitGlobalVariable(I);
if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
DW->EndModule();
if (MAI->getWeakRefDirective()) {
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
if (!I->hasExternalWeakLinkage()) continue;
OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference);
}
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
if (!I->hasExternalWeakLinkage()) continue;
OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference);
}
}
if (MAI->hasSetDirective()) {
OutStreamer.AddBlankLine();
for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
I != E; ++I) {
MCSymbol *Name = Mang->getSymbol(I);
const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
MCSymbol *Target = Mang->getSymbol(GV);
if (I->hasExternalLinkage() || !MAI->getWeakRefDirective())
OutStreamer.EmitSymbolAttribute(Name, MCSA_Global);
else if (I->hasWeakLinkage())
OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference);
else
assert(I->hasLocalLinkage() && "Invalid alias linkage");
EmitVisibility(Name, I->getVisibility());
OutStreamer.EmitAssignment(Name,
MCSymbolRefExpr::Create(Target, OutContext));
}
}
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
assert(MI && "AsmPrinter didn't require GCModuleInfo?");
for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
MP->finishAssembly(O, *this, *MAI);
Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
if (MCSection *S = MAI->getNonexecutableStackSection(OutContext))
OutStreamer.SwitchSection(S);
EmitEndOfAsmFile(M);
delete Mang; Mang = 0;
DW = 0; MMI = 0;
OutStreamer.Finish();
return false;
}
void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
this->MF = &MF;
CurrentFnSym = Mang->getSymbol(MF.getFunction());
if (VerboseAsm)
LI = &getAnalysis<MachineLoopInfo>();
}
namespace {
struct SectionCPs {
const MCSection *S;
unsigned Alignment;
SmallVector<unsigned, 4> CPEs;
SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {}
};
}
void AsmPrinter::EmitConstantPool() {
const MachineConstantPool *MCP = MF->getConstantPool();
const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
if (CP.empty()) return;
SmallVector<SectionCPs, 4> CPSections;
for (unsigned i = 0, e = CP.size(); i != e; ++i) {
const MachineConstantPoolEntry &CPE = CP[i];
unsigned Align = CPE.getAlignment();
SectionKind Kind;
switch (CPE.getRelocationInfo()) {
default: llvm_unreachable("Unknown section kind");
case 2: Kind = SectionKind::getReadOnlyWithRel(); break;
case 1:
Kind = SectionKind::getReadOnlyWithRelLocal();
break;
case 0:
switch (TM.getTargetData()->getTypeAllocSize(CPE.getType())) {
case 4: Kind = SectionKind::getMergeableConst4(); break;
case 8: Kind = SectionKind::getMergeableConst8(); break;
case 16: Kind = SectionKind::getMergeableConst16();break;
default: Kind = SectionKind::getMergeableConst(); break;
}
}
const MCSection *S = getObjFileLowering().getSectionForConstant(Kind);
bool Found = false;
unsigned SecIdx = CPSections.size();
while (SecIdx != 0) {
if (CPSections[--SecIdx].S == S) {
Found = true;
break;
}
}
if (!Found) {
SecIdx = CPSections.size();
CPSections.push_back(SectionCPs(S, Align));
}
if (Align > CPSections[SecIdx].Alignment)
CPSections[SecIdx].Alignment = Align;
CPSections[SecIdx].CPEs.push_back(i);
}
for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
OutStreamer.SwitchSection(CPSections[i].S);
EmitAlignment(Log2_32(CPSections[i].Alignment));
unsigned Offset = 0;
for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
unsigned CPI = CPSections[i].CPEs[j];
MachineConstantPoolEntry CPE = CP[CPI];
unsigned AlignMask = CPE.getAlignment() - 1;
unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
OutStreamer.EmitFill(NewOffset - Offset, 0, 0);
const Type *Ty = CPE.getType();
Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
if (VerboseAsm) {
OutStreamer.GetCommentOS() << "constant pool ";
WriteTypeSymbolic(OutStreamer.GetCommentOS(), CPE.getType(),
MF->getFunction()->getParent());
OutStreamer.GetCommentOS() << '\n';
}
OutStreamer.EmitLabel(GetCPISymbol(CPI));
if (CPE.isMachineConstantPoolEntry())
EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
else
EmitGlobalConstant(CPE.Val.ConstVal);
}
}
}
void AsmPrinter::EmitJumpTableInfo() {
const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
if (MJTI == 0) return;
if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return;
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
if (JT.empty()) return;
const Function *F = MF->getFunction();
bool JTInDiffSection = false;
if ( MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 ||
F->isWeakForLinker()) {
OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F,Mang,TM));
} else {
const MCSection *ReadOnlySection =
getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly());
OutStreamer.SwitchSection(ReadOnlySection);
JTInDiffSection = true;
}
EmitAlignment(Log2_32(MJTI->getEntryAlignment(*TM.getTargetData())));
for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) {
const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
if (JTBBs.empty()) continue;
if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 &&
MAI->hasSetDirective()) {
SmallPtrSet<const MachineBasicBlock*, 16> EmittedSets;
const TargetLowering *TLI = TM.getTargetLowering();
const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF,JTI,OutContext);
for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
const MachineBasicBlock *MBB = JTBBs[ii];
if (!EmittedSets.insert(MBB)) continue;
const MCExpr *LHS =
MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()),
MCBinaryExpr::CreateSub(LHS, Base, OutContext));
}
}
if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0])
OutStreamer.EmitLabel(GetJTISymbol(JTI, true));
OutStreamer.EmitLabel(GetJTISymbol(JTI));
for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
EmitJumpTableEntry(MJTI, JTBBs[ii], JTI);
}
}
void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
const MachineBasicBlock *MBB,
unsigned UID) const {
const MCExpr *Value = 0;
switch (MJTI->getEntryKind()) {
case MachineJumpTableInfo::EK_Inline:
llvm_unreachable("Cannot emit EK_Inline jump table entry"); break;
case MachineJumpTableInfo::EK_Custom32:
Value = TM.getTargetLowering()->LowerCustomJumpTableEntry(MJTI, MBB, UID,
OutContext);
break;
case MachineJumpTableInfo::EK_BlockAddress:
Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
break;
case MachineJumpTableInfo::EK_GPRel32BlockAddress: {
MCSymbol *MBBSym = MBB->getSymbol();
OutStreamer.EmitGPRel32Value(MCSymbolRefExpr::Create(MBBSym, OutContext));
return;
}
case MachineJumpTableInfo::EK_LabelDifference32: {
if (MAI->hasSetDirective()) {
Value = MCSymbolRefExpr::Create(GetJTSetSymbol(UID, MBB->getNumber()),
OutContext);
break;
}
Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
const MCExpr *JTI = MCSymbolRefExpr::Create(GetJTISymbol(UID), OutContext);
Value = MCBinaryExpr::CreateSub(Value, JTI, OutContext);
break;
}
}
assert(Value && "Unknown entry kind!");
unsigned EntrySize = MJTI->getEntrySize(*TM.getTargetData());
OutStreamer.EmitValue(Value, EntrySize, 0);
}
bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
if (GV->getName() == "llvm.used") {
if (MAI->hasNoDeadStrip()) EmitLLVMUsedList(GV->getInitializer());
return true;
}
if (GV->getSection() == "llvm.metadata" ||
GV->hasAvailableExternallyLinkage())
return true;
if (!GV->hasAppendingLinkage()) return false;
assert(GV->hasInitializer() && "Not a special LLVM global!");
const TargetData *TD = TM.getTargetData();
unsigned Align = Log2_32(TD->getPointerPrefAlignment());
if (GV->getName() == "llvm.global_ctors") {
OutStreamer.SwitchSection(getObjFileLowering().getStaticCtorSection());
EmitAlignment(Align, 0);
EmitXXStructorList(GV->getInitializer());
if (TM.getRelocationModel() == Reloc::Static &&
MAI->hasStaticCtorDtorReferenceInStaticMode()) {
StringRef Sym(".constructors_used");
OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym),
MCSA_Reference);
}
return true;
}
if (GV->getName() == "llvm.global_dtors") {
OutStreamer.SwitchSection(getObjFileLowering().getStaticDtorSection());
EmitAlignment(Align, 0);
EmitXXStructorList(GV->getInitializer());
if (TM.getRelocationModel() == Reloc::Static &&
MAI->hasStaticCtorDtorReferenceInStaticMode()) {
StringRef Sym(".destructors_used");
OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym),
MCSA_Reference);
}
return true;
}
return false;
}
void AsmPrinter::EmitLLVMUsedList(Constant *List) {
ConstantArray *InitList = dyn_cast<ConstantArray>(List);
if (InitList == 0) return;
for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
const GlobalValue *GV =
dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang))
OutStreamer.EmitSymbolAttribute(Mang->getSymbol(GV), MCSA_NoDeadStrip);
}
}
void AsmPrinter::EmitXXStructorList(Constant *List) {
if (!isa<ConstantArray>(List)) return;
ConstantArray *InitList = cast<ConstantArray>(List);
for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
if (CS->getNumOperands() != 2) return;
if (CS->getOperand(1)->isNullValue())
return; EmitGlobalConstant(CS->getOperand(1));
}
}
void AsmPrinter::EmitInt8(int Value) const {
OutStreamer.EmitIntValue(Value, 1, 0);
}
void AsmPrinter::EmitInt16(int Value) const {
OutStreamer.EmitIntValue(Value, 2, 0);
}
void AsmPrinter::EmitInt32(int Value) const {
OutStreamer.EmitIntValue(Value, 4, 0);
}
void AsmPrinter::EmitInt64(uint64_t Value) const {
OutStreamer.EmitIntValue(Value, 8, 0);
}
void AsmPrinter::EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
unsigned Size) const {
const MCExpr *Diff =
MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(Hi, OutContext),
MCSymbolRefExpr::Create(Lo, OutContext),
OutContext);
if (!MAI->hasSetDirective()) {
OutStreamer.EmitValue(Diff, Size, 0);
return;
}
MCSymbol *SetLabel =
OutContext.GetOrCreateTemporarySymbol(Twine(MAI->getPrivateGlobalPrefix()) +
"set" + Twine(SetCounter++));
OutStreamer.EmitAssignment(SetLabel, Diff);
OutStreamer.EmitSymbolValue(SetLabel, Size, 0);
}
void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
unsigned ForcedAlignBits,
bool UseFillExpr) const {
if (GV && GV->getAlignment())
NumBits = Log2_32(GV->getAlignment());
NumBits = std::max(NumBits, ForcedAlignBits);
if (NumBits == 0) return;
if (getCurrentSection()->getKind().isText())
OutStreamer.EmitCodeAlignment(1 << NumBits);
else
OutStreamer.EmitValueToAlignment(1 << NumBits, 0, 1, 0);
}
static const MCExpr *LowerConstant(const Constant *CV, AsmPrinter &AP) {
MCContext &Ctx = AP.OutContext;
if (CV->isNullValue() || isa<UndefValue>(CV))
return MCConstantExpr::Create(0, Ctx);
if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV))
return MCConstantExpr::Create(CI->getZExtValue(), Ctx);
if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
return MCSymbolRefExpr::Create(AP.Mang->getSymbol(GV), Ctx);
if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV))
return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx);
const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV);
if (CE == 0) {
llvm_unreachable("Unknown constant value to lower!");
return MCConstantExpr::Create(0, Ctx);
}
switch (CE->getOpcode()) {
default:
if (Constant *C =
ConstantFoldConstantExpression(CE, AP.TM.getTargetData()))
if (C != CE)
return LowerConstant(C, AP);
#ifndef NDEBUG
CE->dump();
#endif
llvm_unreachable("FIXME: Don't support this constant expr");
case Instruction::GetElementPtr: {
const TargetData &TD = *AP.TM.getTargetData();
const Constant *PtrVal = CE->getOperand(0);
SmallVector<Value*, 8> IdxVec(CE->op_begin()+1, CE->op_end());
int64_t Offset = TD.getIndexedOffset(PtrVal->getType(), &IdxVec[0],
IdxVec.size());
const MCExpr *Base = LowerConstant(CE->getOperand(0), AP);
if (Offset == 0)
return Base;
if (TD.getPointerSizeInBits() != 64) {
int SExtAmount = 64-TD.getPointerSizeInBits();
Offset = (Offset << SExtAmount) >> SExtAmount;
}
return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx),
Ctx);
}
case Instruction::Trunc:
case Instruction::BitCast:
return LowerConstant(CE->getOperand(0), AP);
case Instruction::IntToPtr: {
const TargetData &TD = *AP.TM.getTargetData();
Constant *Op = CE->getOperand(0);
Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()),
false);
return LowerConstant(Op, AP);
}
case Instruction::PtrToInt: {
const TargetData &TD = *AP.TM.getTargetData();
Constant *Op = CE->getOperand(0);
const Type *Ty = CE->getType();
const MCExpr *OpExpr = LowerConstant(Op, AP);
if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType()))
return OpExpr;
unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType());
const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx);
return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx);
}
case Instruction::Add:
case Instruction::Sub:
case Instruction::Mul:
case Instruction::SDiv:
case Instruction::SRem:
case Instruction::Shl:
case Instruction::And:
case Instruction::Or:
case Instruction::Xor: {
const MCExpr *LHS = LowerConstant(CE->getOperand(0), AP);
const MCExpr *RHS = LowerConstant(CE->getOperand(1), AP);
switch (CE->getOpcode()) {
default: llvm_unreachable("Unknown binary operator constant cast expr");
case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx);
case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx);
case Instruction::Mul: return MCBinaryExpr::CreateMul(LHS, RHS, Ctx);
case Instruction::SDiv: return MCBinaryExpr::CreateDiv(LHS, RHS, Ctx);
case Instruction::SRem: return MCBinaryExpr::CreateMod(LHS, RHS, Ctx);
case Instruction::Shl: return MCBinaryExpr::CreateShl(LHS, RHS, Ctx);
case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx);
case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx);
case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx);
}
}
}
}
static void EmitGlobalConstantImpl(const Constant *C, unsigned AddrSpace,
AsmPrinter &AP);
static void EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace,
AsmPrinter &AP) {
if (AddrSpace != 0 || !CA->isString()) {
for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
EmitGlobalConstantImpl(CA->getOperand(i), AddrSpace, AP);
return;
}
SmallVector<char, 128> TmpVec;
TmpVec.reserve(CA->getNumOperands());
for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
TmpVec.push_back(cast<ConstantInt>(CA->getOperand(i))->getZExtValue());
AP.OutStreamer.EmitBytes(StringRef(TmpVec.data(), TmpVec.size()), AddrSpace);
}
static void EmitGlobalConstantVector(const ConstantVector *CV,
unsigned AddrSpace, AsmPrinter &AP) {
for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
EmitGlobalConstantImpl(CV->getOperand(i), AddrSpace, AP);
}
static void EmitGlobalConstantStruct(const ConstantStruct *CS,
unsigned AddrSpace, AsmPrinter &AP) {
const TargetData *TD = AP.TM.getTargetData();
unsigned Size = TD->getTypeAllocSize(CS->getType());
const StructLayout *Layout = TD->getStructLayout(CS->getType());
uint64_t SizeSoFar = 0;
for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) {
const Constant *Field = CS->getOperand(i);
uint64_t FieldSize = TD->getTypeAllocSize(Field->getType());
uint64_t PadSize = ((i == e-1 ? Size : Layout->getElementOffset(i+1))
- Layout->getElementOffset(i)) - FieldSize;
SizeSoFar += FieldSize + PadSize;
EmitGlobalConstantImpl(Field, AddrSpace, AP);
AP.OutStreamer.EmitZeros(PadSize, AddrSpace);
}
assert(SizeSoFar == Layout->getSizeInBytes() &&
"Layout of constant struct may be incorrect!");
}
static void EmitGlobalConstantFP(const ConstantFP *CFP, unsigned AddrSpace,
AsmPrinter &AP) {
if (CFP->getType()->isDoubleTy()) {
if (AP.VerboseAsm) {
double Val = CFP->getValueAPF().convertToDouble();
AP.OutStreamer.GetCommentOS() << "double " << Val << '\n';
}
uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace);
return;
}
if (CFP->getType()->isFloatTy()) {
if (AP.VerboseAsm) {
float Val = CFP->getValueAPF().convertToFloat();
AP.OutStreamer.GetCommentOS() << "float " << Val << '\n';
}
uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
AP.OutStreamer.EmitIntValue(Val, 4, AddrSpace);
return;
}
if (CFP->getType()->isX86_FP80Ty()) {
APInt API = CFP->getValueAPF().bitcastToAPInt();
const uint64_t *p = API.getRawData();
if (AP.VerboseAsm) {
APFloat DoubleVal = CFP->getValueAPF();
bool ignored;
DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
&ignored);
AP.OutStreamer.GetCommentOS() << "x86_fp80 ~= "
<< DoubleVal.convertToDouble() << '\n';
}
if (AP.TM.getTargetData()->isBigEndian()) {
AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace);
AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace);
} else {
AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace);
AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace);
}
const TargetData &TD = *AP.TM.getTargetData();
AP.OutStreamer.EmitZeros(TD.getTypeAllocSize(CFP->getType()) -
TD.getTypeStoreSize(CFP->getType()), AddrSpace);
return;
}
assert(CFP->getType()->isPPC_FP128Ty() &&
"Floating point constant type not handled");
APInt API = CFP->getValueAPF().bitcastToAPInt();
const uint64_t *p = API.getRawData();
if (AP.TM.getTargetData()->isBigEndian()) {
AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace);
AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace);
} else {
AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace);
AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace);
}
}
static void EmitGlobalConstantLargeInt(const ConstantInt *CI,
unsigned AddrSpace, AsmPrinter &AP) {
const TargetData *TD = AP.TM.getTargetData();
unsigned BitWidth = CI->getBitWidth();
assert((BitWidth & 63) == 0 && "only support multiples of 64-bits");
const uint64_t *RawData = CI->getValue().getRawData();
for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
uint64_t Val = TD->isBigEndian() ? RawData[e - i - 1] : RawData[i];
AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace);
}
}
void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
uint64_t Size = TM.getTargetData()->getTypeAllocSize(CV->getType());
if (Size)
EmitGlobalConstantImpl(CV, AddrSpace, *this);
else if (MAI->hasSubsectionsViaSymbols()) {
OutStreamer.EmitIntValue(0, 1, AddrSpace);
}
}
static void EmitGlobalConstantImpl(const Constant *CV, unsigned AddrSpace,
AsmPrinter &AP) {
if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV)) {
uint64_t Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType());
return AP.OutStreamer.EmitZeros(Size, AddrSpace);
}
if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
unsigned Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType());
switch (Size) {
case 1:
case 2:
case 4:
case 8:
if (AP.isVerbose())
AP.OutStreamer.GetCommentOS() << format("0x%llx\n", CI->getZExtValue());
AP.OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace);
return;
default:
EmitGlobalConstantLargeInt(CI, AddrSpace, AP);
return;
}
}
if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV))
return EmitGlobalConstantArray(CVA, AddrSpace, AP);
if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
return EmitGlobalConstantStruct(CVS, AddrSpace, AP);
if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
return EmitGlobalConstantFP(CFP, AddrSpace, AP);
if (const ConstantVector *V = dyn_cast<ConstantVector>(CV))
return EmitGlobalConstantVector(V, AddrSpace, AP);
if (isa<ConstantPointerNull>(CV)) {
unsigned Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType());
AP.OutStreamer.EmitIntValue(0, Size, AddrSpace);
return;
}
AP.OutStreamer.EmitValue(LowerConstant(CV, AP),
AP.TM.getTargetData()->getTypeAllocSize(CV->getType()),
AddrSpace);
}
void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
llvm_unreachable("Target does not support EmitMachineConstantPoolValue");
}
void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
if (!strcmp(Code, "private")) {
O << MAI->getPrivateGlobalPrefix();
} else if (!strcmp(Code, "comment")) {
O << MAI->getCommentString();
} else if (!strcmp(Code, "uid")) {
const Function *ThisF = MI->getParent()->getParent()->getFunction();
if (LastMI != MI || LastFn != ThisF) {
++Counter;
LastMI = MI;
LastFn = ThisF;
}
O << Counter;
} else {
std::string msg;
raw_string_ostream Msg(msg);
Msg << "Unknown special formatter '" << Code
<< "' for machine instr: " << *MI;
llvm_report_error(Msg.str());
}
}
void AsmPrinter::processDebugLoc(const MachineInstr *MI,
bool BeforePrintingInsn) {
if (!MAI || !DW || !MAI->doesSupportDebugInformation()
|| !DW->ShouldEmitDwarfDebug())
return;
if (!BeforePrintingInsn)
DW->EndScope(MI);
else
DW->BeginScope(MI);
}
void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
unsigned NumOperands = MI->getNumOperands();
unsigned NumDefs = 0;
for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
++NumDefs)
assert(NumDefs != NumOperands-1 && "No asm string?");
assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
O << '\t';
if (AsmStr[0] == 0) {
O << MAI->getCommentString() << MAI->getInlineAsmStart() << "\n\t";
O << MAI->getCommentString() << MAI->getInlineAsmEnd() << '\n';
return;
}
O << MAI->getCommentString() << MAI->getInlineAsmStart() << "\n\t";
int AsmPrinterVariant = MAI->getAssemblerDialect();
int CurVariant = -1; const char *LastEmitted = AsmStr;
while (*LastEmitted) {
switch (*LastEmitted) {
default: {
const char *LiteralEnd = LastEmitted+1;
while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
*LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
++LiteralEnd;
if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
O.write(LastEmitted, LiteralEnd-LastEmitted);
LastEmitted = LiteralEnd;
break;
}
case '\n':
++LastEmitted; O << '\n'; break;
case '$': {
++LastEmitted; bool Done = true;
switch (*LastEmitted) {
default: Done = false; break;
case '$': if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
O << '$';
++LastEmitted; break;
case '(': ++LastEmitted; if (CurVariant != -1) {
llvm_report_error("Nested variants found in inline asm string: '"
+ std::string(AsmStr) + "'");
}
CurVariant = 0; break;
case '|':
++LastEmitted; if (CurVariant == -1)
O << '|'; else
++CurVariant; break;
case ')': ++LastEmitted; if (CurVariant == -1)
O << '}'; else
CurVariant = -1;
break;
}
if (Done) break;
bool HasCurlyBraces = false;
if (*LastEmitted == '{') { ++LastEmitted; HasCurlyBraces = true;
}
if (HasCurlyBraces && *LastEmitted == ':') {
++LastEmitted;
const char *StrStart = LastEmitted;
const char *StrEnd = strchr(StrStart, '}');
if (StrEnd == 0) {
llvm_report_error("Unterminated ${:foo} operand in inline asm string: '"
+ std::string(AsmStr) + "'");
}
std::string Val(StrStart, StrEnd);
PrintSpecial(MI, Val.c_str());
LastEmitted = StrEnd+1;
break;
}
const char *IDStart = LastEmitted;
char *IDEnd;
errno = 0;
long Val = strtol(IDStart, &IDEnd, 10); if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
llvm_report_error("Bad $ operand number in inline asm string: '"
+ std::string(AsmStr) + "'");
}
LastEmitted = IDEnd;
char Modifier[2] = { 0, 0 };
if (HasCurlyBraces) {
if (*LastEmitted == ':') {
++LastEmitted; if (*LastEmitted == 0) {
llvm_report_error("Bad ${:} expression in inline asm string: '"
+ std::string(AsmStr) + "'");
}
Modifier[0] = *LastEmitted;
++LastEmitted; }
if (*LastEmitted != '}') {
llvm_report_error("Bad ${} expression in inline asm string: '"
+ std::string(AsmStr) + "'");
}
++LastEmitted; }
if ((unsigned)Val >= NumOperands-1) {
llvm_report_error("Invalid $ operand number in inline asm string: '"
+ std::string(AsmStr) + "'");
}
if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
unsigned OpNo = 2;
bool Error = false;
for (; Val; --Val) {
if (OpNo >= MI->getNumOperands()) break;
unsigned OpFlags = MI->getOperand(OpNo).getImm();
OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
}
if (OpNo >= MI->getNumOperands()) {
Error = true;
} else {
unsigned OpFlags = MI->getOperand(OpNo).getImm();
++OpNo;
if (Modifier[0] == 'l') O << *MI->getOperand(OpNo).getMBB()->getSymbol();
else {
AsmPrinter *AP = const_cast<AsmPrinter*>(this);
if ((OpFlags & 7) == 4) {
Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
Modifier[0] ? Modifier : 0);
} else {
Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
Modifier[0] ? Modifier : 0);
}
}
}
if (Error) {
std::string msg;
raw_string_ostream Msg(msg);
Msg << "Invalid operand found in inline asm: '" << AsmStr << "'\n";
MI->print(Msg);
llvm_report_error(Msg.str());
}
}
break;
}
}
}
O << "\n\t" << MAI->getCommentString() << MAI->getInlineAsmEnd();
OutStreamer.AddBlankLine();
}
void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
if (!VerboseAsm) return;
O.PadToColumn(MAI->getCommentColumn());
O << MAI->getCommentString() << " implicit-def: "
<< TRI->getName(MI->getOperand(0).getReg());
OutStreamer.AddBlankLine();
}
void AsmPrinter::printKill(const MachineInstr *MI) const {
if (!VerboseAsm) return;
O.PadToColumn(MAI->getCommentColumn());
O << MAI->getCommentString() << " kill:";
for (unsigned n = 0, e = MI->getNumOperands(); n != e; ++n) {
const MachineOperand &op = MI->getOperand(n);
assert(op.isReg() && "KILL instruction must have only register operands");
O << ' ' << TRI->getName(op.getReg()) << (op.isDef() ? "<def>" : "<kill>");
}
OutStreamer.AddBlankLine();
}
void AsmPrinter::printLabelInst(const MachineInstr *MI) const {
OutStreamer.EmitLabel(MI->getOperand(0).getMCSymbol());
}
bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode) {
return true;
}
bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode) {
return true;
}
MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const {
return MMI->getAddrLabelSymbol(BA->getBasicBlock());
}
MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BasicBlock *BB) const {
return MMI->getAddrLabelSymbol(BB);
}
MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const {
return OutContext.GetOrCreateTemporarySymbol
(Twine(MAI->getPrivateGlobalPrefix()) + "CPI" + Twine(getFunctionNumber())
+ "_" + Twine(CPID));
}
MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const {
return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate);
}
MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const {
return OutContext.GetOrCreateTemporarySymbol
(Twine(MAI->getPrivateGlobalPrefix()) + Twine(getFunctionNumber()) + "_" +
Twine(UID) + "_set_" + Twine(MBBID));
}
MCSymbol *AsmPrinter::GetSymbolWithGlobalValueBase(const GlobalValue *GV,
StringRef Suffix,
bool ForcePrivate) const {
SmallString<60> NameStr;
Mang->getNameWithPrefix(NameStr, GV, ForcePrivate);
NameStr.append(Suffix.begin(), Suffix.end());
if (!GV->hasPrivateLinkage() && !ForcePrivate)
return OutContext.GetOrCreateSymbol(NameStr.str());
return OutContext.GetOrCreateTemporarySymbol(NameStr.str());
}
MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const {
SmallString<60> NameStr;
Mang->getNameWithPrefix(NameStr, Sym);
return OutContext.GetOrCreateSymbol(NameStr.str());
}
static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop,
unsigned FunctionNumber) {
if (Loop == 0) return;
PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber);
OS.indent(Loop->getLoopDepth()*2)
<< "Parent Loop BB" << FunctionNumber << "_"
<< Loop->getHeader()->getNumber()
<< " Depth=" << Loop->getLoopDepth() << '\n';
}
static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop,
unsigned FunctionNumber) {
for (MachineLoop::iterator CL = Loop->begin(), E = Loop->end();CL != E; ++CL){
OS.indent((*CL)->getLoopDepth()*2)
<< "Child Loop BB" << FunctionNumber << "_"
<< (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth()
<< '\n';
PrintChildLoopComment(OS, *CL, FunctionNumber);
}
}
static void PrintBasicBlockLoopComments(const MachineBasicBlock &MBB,
const MachineLoopInfo *LI,
const AsmPrinter &AP) {
const MachineLoop *Loop = LI->getLoopFor(&MBB);
if (Loop == 0) return;
MachineBasicBlock *Header = Loop->getHeader();
assert(Header && "No header for loop");
if (Header != &MBB) {
AP.OutStreamer.AddComment(" in Loop: Header=BB" +
Twine(AP.getFunctionNumber())+"_" +
Twine(Loop->getHeader()->getNumber())+
" Depth="+Twine(Loop->getLoopDepth()));
return;
}
raw_ostream &OS = AP.OutStreamer.GetCommentOS();
PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber());
OS << "=>";
OS.indent(Loop->getLoopDepth()*2-2);
OS << "This ";
if (Loop->empty())
OS << "Inner ";
OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n';
PrintChildLoopComment(OS, Loop, AP.getFunctionNumber());
}
void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock *MBB) const {
if (unsigned Align = MBB->getAlignment())
EmitAlignment(Log2_32(Align));
if (MBB->hasAddressTaken()) {
const BasicBlock *BB = MBB->getBasicBlock();
if (VerboseAsm)
OutStreamer.AddComment("Block address taken");
std::vector<MCSymbol*> Syms = MMI->getAddrLabelSymbolToEmit(BB);
for (unsigned i = 0, e = Syms.size(); i != e; ++i)
OutStreamer.EmitLabel(Syms[i]);
}
if (MBB->pred_empty() || isBlockOnlyReachableByFallthrough(MBB)) {
if (VerboseAsm) {
O << MAI->getCommentString() << " BB#" << MBB->getNumber() << ':';
if (const BasicBlock *BB = MBB->getBasicBlock())
if (BB->hasName())
OutStreamer.AddComment("%" + BB->getName());
PrintBasicBlockLoopComments(*MBB, LI, *this);
OutStreamer.AddBlankLine();
}
} else {
if (VerboseAsm) {
if (const BasicBlock *BB = MBB->getBasicBlock())
if (BB->hasName())
OutStreamer.AddComment("%" + BB->getName());
PrintBasicBlockLoopComments(*MBB, LI, *this);
}
OutStreamer.EmitLabel(MBB->getSymbol());
}
}
void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility) const {
MCSymbolAttr Attr = MCSA_Invalid;
switch (Visibility) {
default: break;
case GlobalValue::HiddenVisibility:
Attr = MAI->getHiddenVisibilityAttr();
break;
case GlobalValue::ProtectedVisibility:
Attr = MAI->getProtectedVisibilityAttr();
break;
}
if (Attr != MCSA_Invalid)
OutStreamer.EmitSymbolAttribute(Sym, Attr);
}
void AsmPrinter::printOffset(int64_t Offset) const {
if (Offset > 0)
O << '+' << Offset;
else if (Offset < 0)
O << Offset;
}
bool AsmPrinter::isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB)
const {
if (MBB->isLandingPad() || MBB->pred_empty())
return false;
MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI;
++PI2;
if (PI2 != MBB->pred_end())
return false;
const MachineBasicBlock *Pred = *PI;
if (!Pred->isLayoutSuccessor(MBB))
return false;
if (Pred->empty())
return true;
const MachineInstr &LastInst = Pred->back();
return !LastInst.getDesc().isBarrier();
}
GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
if (!S->usesMetadata())
return 0;
gcp_iterator GCPI = GCMetadataPrinters.find(S);
if (GCPI != GCMetadataPrinters.end())
return GCPI->second;
const char *Name = S->getName().c_str();
for (GCMetadataPrinterRegistry::iterator
I = GCMetadataPrinterRegistry::begin(),
E = GCMetadataPrinterRegistry::end(); I != E; ++I)
if (strcmp(Name, I->getName()) == 0) {
GCMetadataPrinter *GMP = I->instantiate();
GMP->S = S;
GCMetadataPrinters.insert(std::make_pair(S, GMP));
return GMP;
}
llvm_report_error("no GCMetadataPrinter registered for GC: " + Twine(Name));
return 0;
}