Check in LLVM r95781.
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
new file mode 100644
index 0000000..fc08384
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -0,0 +1,1790 @@
+//===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the AsmPrinter class.
+//
+//===----------------------------------------------------------------------===//
+
+#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/TargetOptions.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,
+ MCContext &Ctx, MCStreamer &Streamer,
+ const MCAsmInfo *T)
+ : MachineFunctionPass(&ID), O(o),
+ TM(tm), MAI(T), TRI(tm.getRegisterInfo()),
+ OutContext(Ctx), OutStreamer(Streamer),
+ LastMI(0), LastFn(0), Counter(~0U), PrevDLT(NULL) {
+ 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;
+ delete &OutContext;
+}
+
+/// getFunctionNumber - Return a unique ID for the current function.
+///
+unsigned AsmPrinter::getFunctionNumber() const {
+ return MF->getFunctionNumber();
+}
+
+TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
+ return TM.getTargetLowering()->getObjFileLowering();
+}
+
+/// getCurrentSection() - Return the current section we are emitting to.
+const MCSection *AsmPrinter::getCurrentSection() const {
+ return OutStreamer.getCurrentSection();
+}
+
+
+void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ MachineFunctionPass::getAnalysisUsage(AU);
+ AU.addRequired<GCModuleInfo>();
+ if (VerboseAsm)
+ AU.addRequired<MachineLoopInfo>();
+}
+
+bool AsmPrinter::doInitialization(Module &M) {
+ // Initialize TargetLoweringObjectFile.
+ const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
+ .Initialize(OutContext, TM);
+
+ Mang = new Mangler(*MAI);
+
+ // Allow the target to emit any magic that it wants at the start of the file.
+ EmitStartOfAsmFile(M);
+
+ // Very minimal debug info. It is ignored if we emit actual debug info. If we
+ // don't, this at least helps the user find where a global came from.
+ if (MAI->hasSingleParameterDotFile()) {
+ // .file "foo.c"
+ 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";
+
+ MMI = getAnalysisIfAvailable<MachineModuleInfo>();
+ if (MMI)
+ MMI->AnalyzeModule(M);
+ 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::LinkerPrivateLinkage:
+ if (MAI->getWeakDefDirective() != 0) {
+ // .globl _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ // .weak_definition _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
+ } else if (const char *LinkOnce = MAI->getLinkOnceDirective()) {
+ // .globl _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, 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
+ // .linkonce discard
+ // FIXME: It would be nice to use .linkonce samesize for non-common
+ // globals.
+ O << LinkOnce;
+ } else {
+ // .weak _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak);
+ }
+ break;
+ case GlobalValue::DLLExportLinkage:
+ 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.
+ // .globl _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ break;
+ case GlobalValue::PrivateLinkage:
+ case GlobalValue::InternalLinkage:
+ break;
+ default:
+ llvm_unreachable("Unknown linkage type!");
+ }
+}
+
+
+/// EmitGlobalVariable - Emit the specified global variable to the .s file.
+void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
+ if (!GV->hasInitializer()) // External globals require no code.
+ return;
+
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (EmitSpecialLLVMGlobal(GV))
+ return;
+
+ MCSymbol *GVSym = GetGlobalValueSymbol(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);
+
+ // Handle common and BSS local symbols (.lcomm).
+ if (GVKind.isCommon() || GVKind.isBSSLocal()) {
+ if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
+
+ if (VerboseAsm) {
+ WriteAsOperand(OutStreamer.GetCommentOS(), GV,
+ /*PrintType=*/false, GV->getParent());
+ OutStreamer.GetCommentOS() << '\n';
+ }
+
+ // Handle common symbols.
+ if (GVKind.isCommon()) {
+ // .comm _foo, 42, 4
+ OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog);
+ return;
+ }
+
+ // Handle local BSS symbols.
+ if (MAI->hasMachoZeroFillDirective()) {
+ const MCSection *TheSection =
+ getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM);
+ // .zerofill __DATA, __bss, _foo, 400, 5
+ OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
+ return;
+ }
+
+ if (MAI->hasLCOMMDirective()) {
+ // .lcomm _foo, 42
+ OutStreamer.EmitLocalCommonSymbol(GVSym, Size);
+ return;
+ }
+
+ // .local _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local);
+ // .comm _foo, 42, 4
+ OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog);
+ return;
+ }
+
+ const MCSection *TheSection =
+ getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM);
+
+ // Handle the zerofill directive on darwin, which is a special form of BSS
+ // emission.
+ if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) {
+ // .globl _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ // .zerofill __DATA, __common, _foo, 400, 5
+ OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
+ return;
+ }
+
+ OutStreamer.SwitchSection(TheSection);
+
+ EmitLinkage(GV->getLinkage(), GVSym);
+ EmitAlignment(AlignLog, GV);
+
+ if (VerboseAsm) {
+ WriteAsOperand(OutStreamer.GetCommentOS(), GV,
+ /*PrintType=*/false, GV->getParent());
+ OutStreamer.GetCommentOS() << '\n';
+ }
+ OutStreamer.EmitLabel(GVSym);
+
+ EmitGlobalConstant(GV->getInitializer());
+
+ if (MAI->hasDotTypeDotSizeDirective())
+ // .size foo, 42
+ OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext));
+
+ OutStreamer.AddBlankLine();
+}
+
+/// EmitFunctionHeader - This method emits the header for the current
+/// function.
+void AsmPrinter::EmitFunctionHeader() {
+ // Print out constants referenced by the function
+ EmitConstantPool();
+
+ // Print the 'header' of function.
+ 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,
+ /*PrintType=*/false, F->getParent());
+ OutStreamer.GetCommentOS() << '\n';
+ }
+
+ // Emit the CurrentFnSym. This is a virtual function to allow targets to
+ // do their wild and crazy things as required.
+ EmitFunctionEntryLabel();
+
+ // Add some workaround for linkonce linkage on Cygwin\MinGW.
+ if (MAI->getLinkOnceDirective() != 0 &&
+ (F->hasLinkOnceLinkage() || F->hasWeakLinkage()))
+ // FIXME: What is this?
+ O << "Lllvm$workaround$fake$stub$" << *CurrentFnSym << ":\n";
+
+ // Emit pre-function debug and/or EH information.
+ if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
+ DW->BeginFunction(MF);
+}
+
+/// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the
+/// function. This can be overridden by targets as required to do custom stuff.
+void AsmPrinter::EmitFunctionEntryLabel() {
+ OutStreamer.EmitLabel(CurrentFnSym);
+}
+
+
+/// EmitComments - Pretty-print comments for instructions.
+static void EmitComments(const MachineInstr &MI, raw_ostream &CommentOS) {
+ const MachineFunction *MF = MI.getParent()->getParent();
+ const TargetMachine &TM = MF->getTarget();
+
+ if (!MI.getDebugLoc().isUnknown()) {
+ DILocation DLT = MF->getDILocation(MI.getDebugLoc());
+
+ // Print source line info.
+ DIScope Scope = DLT.getScope();
+ // Omit the directory, because it's likely to be long and uninteresting.
+ if (!Scope.isNull())
+ CommentOS << Scope.getFilename();
+ else
+ CommentOS << "<unknown>";
+ CommentOS << ':' << DLT.getLineNumber();
+ if (DLT.getColumnNumber() != 0)
+ CommentOS << ':' << DLT.getColumnNumber();
+ CommentOS << '\n';
+ }
+
+ // Check for spills and reloads
+ int FI;
+
+ const MachineFrameInfo *FrameInfo = MF->getFrameInfo();
+
+ // We assume a single instruction only has a spill or reload, not
+ // both.
+ 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";
+ }
+
+ // Check for spill-induced copies
+ unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
+ if (TM.getInstrInfo()->isMoveInstr(MI, SrcReg, DstReg,
+ SrcSubIdx, DstSubIdx)) {
+ if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse))
+ CommentOS << " Reload Reuse\n";
+ }
+}
+
+
+
+/// EmitFunctionBody - This method emits the body and trailer for a
+/// function.
+void AsmPrinter::EmitFunctionBody() {
+ // Emit target-specific gunk before the function body.
+ EmitFunctionBodyStart();
+
+ // 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;
+
+ ++EmittedInsts;
+
+ // FIXME: Clean up processDebugLoc.
+ processDebugLoc(II, true);
+
+ if (VerboseAsm)
+ EmitComments(*II, OutStreamer.GetCommentOS());
+
+ switch (II->getOpcode()) {
+ case TargetOpcode::DBG_LABEL:
+ case TargetOpcode::EH_LABEL:
+ case TargetOpcode::GC_LABEL:
+ printLabelInst(II);
+ break;
+ case TargetOpcode::INLINEASM:
+ printInlineAsm(II);
+ break;
+ case TargetOpcode::IMPLICIT_DEF:
+ printImplicitDef(II);
+ break;
+ case TargetOpcode::KILL:
+ printKill(II);
+ break;
+ default:
+ EmitInstruction(II);
+ break;
+ }
+
+ // FIXME: Clean up processDebugLoc.
+ processDebugLoc(II, false);
+ }
+ }
+
+ // If the function is empty and the object file uses .subsections_via_symbols,
+ // then we need to emit *something* to the function body to prevent the
+ // labels from collapsing together. Just emit a 0 byte.
+ if (MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode)
+ OutStreamer.EmitIntValue(0, 1, 0/*addrspace*/);
+
+ // Emit target-specific gunk after the function body.
+ EmitFunctionBodyEnd();
+
+ if (MAI->hasDotTypeDotSizeDirective())
+ O << "\t.size\t" << *CurrentFnSym << ", .-" << *CurrentFnSym << '\n';
+
+ // Emit post-function debug information.
+ if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
+ DW->EndFunction(MF);
+
+ // Print out jump tables referenced by the function.
+ EmitJumpTableInfo();
+
+ OutStreamer.AddBlankLine();
+}
+
+
+bool AsmPrinter::doFinalization(Module &M) {
+ // Emit global variables.
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I)
+ EmitGlobalVariable(I);
+
+ // Emit final debug information.
+ if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
+ DW->EndModule();
+
+ // If the target wants to know about weak references, print them all.
+ if (MAI->getWeakRefDirective()) {
+ // FIXME: This is not lazy, it would be nice to only print weak references
+ // to stuff that is actually used. Note that doing so would require targets
+ // to notice uses in operands (due to constant exprs etc). This should
+ // happen with the MC stuff eventually.
+
+ // 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->hasExternalWeakLinkage()) continue;
+ OutStreamer.EmitSymbolAttribute(GetGlobalValueSymbol(I),
+ MCSA_WeakReference);
+ }
+
+ for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
+ if (!I->hasExternalWeakLinkage()) continue;
+ OutStreamer.EmitSymbolAttribute(GetGlobalValueSymbol(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 = GetGlobalValueSymbol(I);
+
+ const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
+ MCSymbol *Target = GetGlobalValueSymbol(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());
+
+ // Emit the directives as assignments aka .set:
+ 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);
+
+ // If we don't have any trampolines, then we don't require stack memory
+ // to be executable. Some targets have a directive to declare this.
+ Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
+ if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
+ if (MCSection *S = MAI->getNonexecutableStackSection(OutContext))
+ OutStreamer.SwitchSection(S);
+
+ // Allow the target to emit any magic that it wants at the end of the file,
+ // after everything else has gone out.
+ EmitEndOfAsmFile(M);
+
+ delete Mang; Mang = 0;
+ DW = 0; MMI = 0;
+
+ OutStreamer.Finish();
+ return false;
+}
+
+void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
+ this->MF = &MF;
+ // Get the function symbol.
+ CurrentFnSym = GetGlobalValueSymbol(MF.getFunction());
+
+ if (VerboseAsm)
+ LI = &getAnalysis<MachineLoopInfo>();
+}
+
+namespace {
+ // SectionCPs - Keep track the alignment, constpool entries per Section.
+ struct SectionCPs {
+ const MCSection *S;
+ unsigned Alignment;
+ SmallVector<unsigned, 4> CPEs;
+ SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {}
+ };
+}
+
+/// EmitConstantPool - Print to the current output stream assembly
+/// representations of the constants in the constant pool MCP. This is
+/// used to print out constants which have been "spilled to memory" by
+/// the code generator.
+///
+void AsmPrinter::EmitConstantPool() {
+ const MachineConstantPool *MCP = MF->getConstantPool();
+ const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
+ if (CP.empty()) return;
+
+ // Calculate sections for constant pool entries. We collect entries to go into
+ // the same section together to reduce amount of section switch statements.
+ 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);
+
+ // The number of sections are small, just do a linear search from the
+ // last section to the first.
+ 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);
+ }
+
+ // Now print stuff into the calculated sections.
+ 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];
+
+ // Emit inter-object padding for alignment.
+ unsigned AlignMask = CPE.getAlignment() - 1;
+ unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
+ OutStreamer.EmitFill(NewOffset - Offset, 0/*fillval*/, 0/*addrspace*/);
+
+ const Type *Ty = CPE.getType();
+ Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
+
+ // Emit the label with a comment on it.
+ 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);
+ }
+ }
+}
+
+/// EmitJumpTableInfo - Print assembly representations of the jump tables used
+/// by the current function to the current output stream.
+///
+void AsmPrinter::EmitJumpTableInfo() {
+ const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
+ if (MJTI == 0) return;
+ const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
+ if (JT.empty()) return;
+
+ // Pick the directive to use to print the jump table entries, and switch to
+ // the appropriate section.
+ const Function *F = MF->getFunction();
+ bool JTInDiffSection = false;
+ if (// In PIC mode, we need to emit the jump table to the same section as the
+ // function body itself, otherwise the label differences won't make sense.
+ // FIXME: Need a better predicate for this: what about custom entries?
+ MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 ||
+ // We should also do if the section name is NULL or function is declared
+ // in discardable section
+ // FIXME: this isn't the right predicate, should be based on the MCSection
+ // for the function.
+ F->isWeakForLinker()) {
+ OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F,Mang,TM));
+ } else {
+ // Otherwise, drop it in the readonly section.
+ 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 this jump table was deleted, ignore it.
+ if (JTBBs.empty()) continue;
+
+ // For the EK_LabelDifference32 entry, if the target supports .set, emit a
+ // .set directive for each unique entry. This reduces the number of
+ // relocations the assembler will generate for the jump table.
+ 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;
+
+ // .set LJTSet, LBB32-base
+ const MCExpr *LHS =
+ MCSymbolRefExpr::Create(MBB->getSymbol(OutContext), OutContext);
+ OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()),
+ MCBinaryExpr::CreateSub(LHS, Base, OutContext));
+ }
+ }
+
+ // On some targets (e.g. Darwin) we want to emit two consequtive labels
+ // before each jump table. The first label is never referenced, but tells
+ // the assembler and linker the extents of the jump table object. The
+ // second label is actually referenced by the code.
+ if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0])
+ // FIXME: This doesn't have to have any specific name, just any randomly
+ // named and numbered 'l' label would work. Simplify GetJTISymbol.
+ OutStreamer.EmitLabel(GetJTISymbol(JTI, true));
+
+ OutStreamer.EmitLabel(GetJTISymbol(JTI));
+
+ for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
+ EmitJumpTableEntry(MJTI, JTBBs[ii], JTI);
+ }
+}
+
+/// EmitJumpTableEntry - Emit a jump table entry for the specified MBB to the
+/// current stream.
+void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
+ const MachineBasicBlock *MBB,
+ unsigned UID) const {
+ const MCExpr *Value = 0;
+ switch (MJTI->getEntryKind()) {
+ case MachineJumpTableInfo::EK_Custom32:
+ Value = TM.getTargetLowering()->LowerCustomJumpTableEntry(MJTI, MBB, UID,
+ OutContext);
+ break;
+ case MachineJumpTableInfo::EK_BlockAddress:
+ // EK_BlockAddress - Each entry is a plain address of block, e.g.:
+ // .word LBB123
+ Value = MCSymbolRefExpr::Create(MBB->getSymbol(OutContext), OutContext);
+ break;
+ case MachineJumpTableInfo::EK_GPRel32BlockAddress: {
+ // EK_GPRel32BlockAddress - Each entry is an address of block, encoded
+ // with a relocation as gp-relative, e.g.:
+ // .gprel32 LBB123
+ MCSymbol *MBBSym = MBB->getSymbol(OutContext);
+ OutStreamer.EmitGPRel32Value(MCSymbolRefExpr::Create(MBBSym, OutContext));
+ return;
+ }
+
+ case MachineJumpTableInfo::EK_LabelDifference32: {
+ // EK_LabelDifference32 - Each entry is the address of the block minus
+ // the address of the jump table. This is used for PIC jump tables where
+ // gprel32 is not supported. e.g.:
+ // .word LBB123 - LJTI1_2
+ // If the .set directive is supported, this is emitted as:
+ // .set L4_5_set_123, LBB123 - LJTI1_2
+ // .word L4_5_set_123
+
+ // If we have emitted set directives for the jump table entries, print
+ // them rather than the entries themselves. If we're emitting PIC, then
+ // emit the table entries as differences between two text section labels.
+ if (MAI->hasSetDirective()) {
+ // If we used .set, reference the .set's symbol.
+ Value = MCSymbolRefExpr::Create(GetJTSetSymbol(UID, MBB->getNumber()),
+ OutContext);
+ break;
+ }
+ // Otherwise, use the difference as the jump table entry.
+ Value = MCSymbolRefExpr::Create(MBB->getSymbol(OutContext), 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, /*addrspace*/0);
+}
+
+
+/// EmitSpecialLLVMGlobal - Check to see if the specified global is a
+/// special global used by LLVM. If so, emit it and return true, otherwise
+/// do nothing and return false.
+bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
+ if (GV->getName() == "llvm.used") {
+ if (MAI->hasNoDeadStrip()) // No need to emit this at all.
+ EmitLLVMUsedList(GV->getInitializer());
+ return true;
+ }
+
+ // Ignore debug and non-emitted data. This handles llvm.compiler.used.
+ 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;
+}
+
+/// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each
+/// global in the specified llvm.used list for which emitUsedDirectiveFor
+/// is true, as being used with this directive.
+void AsmPrinter::EmitLLVMUsedList(Constant *List) {
+ // Should be an array of 'i8*'.
+ 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(GetGlobalValueSymbol(GV),
+ MCSA_NoDeadStrip);
+ }
+}
+
+/// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
+/// function pointers, ignoring the init priority.
+void AsmPrinter::EmitXXStructorList(Constant *List) {
+ // Should be an array of '{ int, void ()* }' structs. The first value is the
+ // init priority, which we ignore.
+ 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; // Not array of 2-element structs.
+
+ if (CS->getOperand(1)->isNullValue())
+ return; // Found a null terminator, exit printing.
+ // Emit the function pointer.
+ EmitGlobalConstant(CS->getOperand(1));
+ }
+}
+
+//===--------------------------------------------------------------------===//
+// Emission and print routines
+//
+
+/// EmitInt8 - Emit a byte directive and value.
+///
+void AsmPrinter::EmitInt8(int Value) const {
+ OutStreamer.EmitIntValue(Value, 1, 0/*addrspace*/);
+}
+
+/// EmitInt16 - Emit a short directive and value.
+///
+void AsmPrinter::EmitInt16(int Value) const {
+ OutStreamer.EmitIntValue(Value, 2, 0/*addrspace*/);
+}
+
+/// EmitInt32 - Emit a long directive and value.
+///
+void AsmPrinter::EmitInt32(int Value) const {
+ OutStreamer.EmitIntValue(Value, 4, 0/*addrspace*/);
+}
+
+/// EmitInt64 - Emit a long long directive and value.
+///
+void AsmPrinter::EmitInt64(uint64_t Value) const {
+ OutStreamer.EmitIntValue(Value, 8, 0/*addrspace*/);
+}
+
+//===----------------------------------------------------------------------===//
+
+// EmitAlignment - Emit an alignment directive to the specified power of
+// two boundary. For example, if you pass in 3 here, you will get an 8
+// byte alignment. If a global value is specified, and if that global has
+// an explicit alignment requested, it will unconditionally override the
+// alignment request. However, if ForcedAlignBits is specified, this value
+// has final say: the ultimate alignment will be the max of ForcedAlignBits
+// and the alignment computed with NumBits and the global.
+//
+// The algorithm is:
+// Align = NumBits;
+// if (GV && GV->hasalignment) Align = GV->getalignment();
+// Align = std::max(Align, ForcedAlignBits);
+//
+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; // No need to emit alignment.
+
+ unsigned FillValue = 0;
+ if (getCurrentSection()->getKind().isText())
+ FillValue = MAI->getTextAlignFillValue();
+
+ OutStreamer.EmitValueToAlignment(1 << NumBits, FillValue, 1, 0);
+}
+
+/// LowerConstant - Lower the specified LLVM Constant to an MCExpr.
+///
+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.GetGlobalValueSymbol(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 the code isn't optimized, there may be outstanding folding
+ // opportunities. Attempt to fold the expression using TargetData as a
+ // last resort before giving up.
+ 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();
+ // Generate a symbolic expression for the byte address
+ 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;
+
+ // Truncate/sext the offset to the pointer size.
+ 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:
+ // We emit the value and depend on the assembler to truncate the generated
+ // expression properly. This is important for differences between
+ // blockaddress labels. Since the two labels are in the same function, it
+ // is reasonable to treat their delta as a 32-bit value.
+ // FALL THROUGH.
+ case Instruction::BitCast:
+ return LowerConstant(CE->getOperand(0), AP);
+
+ case Instruction::IntToPtr: {
+ const TargetData &TD = *AP.TM.getTargetData();
+ // Handle casts to pointers by changing them into casts to the appropriate
+ // integer type. This promotes constant folding and simplifies this code.
+ Constant *Op = CE->getOperand(0);
+ Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()),
+ false/*ZExt*/);
+ return LowerConstant(Op, AP);
+ }
+
+ case Instruction::PtrToInt: {
+ const TargetData &TD = *AP.TM.getTargetData();
+ // Support only foldable casts to/from pointers that can be eliminated by
+ // changing the pointer to the appropriately sized integer type.
+ Constant *Op = CE->getOperand(0);
+ const Type *Ty = CE->getType();
+
+ const MCExpr *OpExpr = LowerConstant(Op, AP);
+
+ // We can emit the pointer value into this slot if the slot is an
+ // integer slot equal to the size of the pointer.
+ if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType()))
+ return OpExpr;
+
+ // Otherwise the pointer is smaller than the resultant integer, mask off
+ // the high bits so we are sure to get a proper truncation if the input is
+ // a constant expr.
+ unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType());
+ const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx);
+ return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx);
+ }
+
+ // The MC library also has a right-shift operator, but it isn't consistently
+ // signed or unsigned between different targets.
+ 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 EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace,
+ AsmPrinter &AP) {
+ if (AddrSpace != 0 || !CA->isString()) {
+ // Not a string. Print the values in successive locations
+ for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
+ AP.EmitGlobalConstant(CA->getOperand(i), AddrSpace);
+ return;
+ }
+
+ // Otherwise, it can be emitted as .ascii.
+ 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)
+ AP.EmitGlobalConstant(CV->getOperand(i), AddrSpace);
+}
+
+static void EmitGlobalConstantStruct(const ConstantStruct *CS,
+ unsigned AddrSpace, AsmPrinter &AP) {
+ // Print the fields in successive locations. Pad to align if needed!
+ 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);
+
+ // Check if padding is needed and insert one or more 0s.
+ 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;
+
+ // Now print the actual field value.
+ AP.EmitGlobalConstant(Field, AddrSpace);
+
+ // Insert padding - this may include padding to increase the size of the
+ // current field up to the ABI size (if the struct is not packed) as well
+ // as padding to ensure that the next field starts at the right offset.
+ 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) {
+ // FP Constants are printed as integer constants to avoid losing
+ // precision.
+ 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()) {
+ // all long double variants are printed as hex
+ // api needed to prevent premature destruction
+ APInt API = CFP->getValueAPF().bitcastToAPInt();
+ const uint64_t *p = API.getRawData();
+ if (AP.VerboseAsm) {
+ // Convert to double so we can print the approximate val as a comment.
+ 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);
+ }
+
+ // Emit the tail padding for the long double.
+ 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");
+ // All long double variants are printed as hex api needed to prevent
+ // premature destruction.
+ 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");
+
+ // We don't expect assemblers to support integer data directives
+ // for more than 64 bits, so we emit the data in at most 64-bit
+ // quantities at a time.
+ 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);
+ }
+}
+
+/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
+void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
+ if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV)) {
+ uint64_t Size = TM.getTargetData()->getTypeAllocSize(CV->getType());
+ if (Size == 0) Size = 1; // An empty "_foo:" followed by a section is undef.
+ return OutStreamer.EmitZeros(Size, AddrSpace);
+ }
+
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
+ unsigned Size = TM.getTargetData()->getTypeAllocSize(CV->getType());
+ switch (Size) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ if (VerboseAsm)
+ OutStreamer.GetCommentOS() << format("0x%llx\n", CI->getZExtValue());
+ OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace);
+ return;
+ default:
+ EmitGlobalConstantLargeInt(CI, AddrSpace, *this);
+ return;
+ }
+ }
+
+ if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV))
+ return EmitGlobalConstantArray(CVA, AddrSpace, *this);
+
+ if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
+ return EmitGlobalConstantStruct(CVS, AddrSpace, *this);
+
+ if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
+ return EmitGlobalConstantFP(CFP, AddrSpace, *this);
+
+ if (const ConstantVector *V = dyn_cast<ConstantVector>(CV))
+ return EmitGlobalConstantVector(V, AddrSpace, *this);
+
+ if (isa<ConstantPointerNull>(CV)) {
+ unsigned Size = TM.getTargetData()->getTypeAllocSize(CV->getType());
+ OutStreamer.EmitIntValue(0, Size, AddrSpace);
+ return;
+ }
+
+ // Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it
+ // thread the streamer with EmitValue.
+ OutStreamer.EmitValue(LowerConstant(CV, *this),
+ TM.getTargetData()->getTypeAllocSize(CV->getType()),
+ AddrSpace);
+}
+
+void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
+ // Target doesn't support this yet!
+ llvm_unreachable("Target does not support EmitMachineConstantPoolValue");
+}
+
+/// PrintSpecial - Print information related to the specified machine instr
+/// that is independent of the operand, and may be independent of the instr
+/// itself. This can be useful for portably encoding the comment character
+/// or other bits of target-specific knowledge into the asmstrings. The
+/// syntax used is ${:comment}. Targets can override this to add support
+/// for their own strange codes.
+void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
+ if (!strcmp(Code, "private")) {
+ O << MAI->getPrivateGlobalPrefix();
+ } else if (!strcmp(Code, "comment")) {
+ if (VerboseAsm)
+ O << MAI->getCommentString();
+ } else if (!strcmp(Code, "uid")) {
+ // Comparing the address of MI isn't sufficient, because machineinstrs may
+ // be allocated to the same address across functions.
+ const Function *ThisF = MI->getParent()->getParent()->getFunction();
+
+ // If this is a new LastFn instruction, bump the counter.
+ 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());
+ }
+}
+
+/// processDebugLoc - Processes the debug information of each machine
+/// instruction's DebugLoc.
+void AsmPrinter::processDebugLoc(const MachineInstr *MI,
+ bool BeforePrintingInsn) {
+ if (!MAI || !DW || !MAI->doesSupportDebugInformation()
+ || !DW->ShouldEmitDwarfDebug())
+ return;
+ DebugLoc DL = MI->getDebugLoc();
+ if (DL.isUnknown())
+ return;
+ DILocation CurDLT = MF->getDILocation(DL);
+ if (CurDLT.getScope().isNull())
+ return;
+
+ if (!BeforePrintingInsn) {
+ // After printing instruction
+ DW->EndScope(MI);
+ } else if (CurDLT.getNode() != PrevDLT) {
+ unsigned L = DW->RecordSourceLine(CurDLT.getLineNumber(),
+ CurDLT.getColumnNumber(),
+ CurDLT.getScope().getNode());
+ printLabel(L);
+ O << '\n';
+ DW->BeginScope(MI, L);
+ PrevDLT = CurDLT.getNode();
+ }
+}
+
+
+/// printInlineAsm - This method formats and prints the specified machine
+/// instruction that is an inline asm.
+void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
+ unsigned NumOperands = MI->getNumOperands();
+
+ // Count the number of register definitions.
+ 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?");
+
+ // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
+ const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
+
+ O << '\t';
+
+ // If this asmstr is empty, just print the #APP/#NOAPP markers.
+ // These are useful to see where empty asm's wound up.
+ 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";
+
+ // The variant of the current asmprinter.
+ int AsmPrinterVariant = MAI->getAssemblerDialect();
+
+ int CurVariant = -1; // The number of the {.|.|.} region we are in.
+ const char *LastEmitted = AsmStr; // One past the last character emitted.
+
+ while (*LastEmitted) {
+ switch (*LastEmitted) {
+ default: {
+ // Not a special case, emit the string section literally.
+ 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; // Consume newline character.
+ O << '\n'; // Indent code with newline.
+ break;
+ case '$': {
+ ++LastEmitted; // Consume '$' character.
+ bool Done = true;
+
+ // Handle escapes.
+ switch (*LastEmitted) {
+ default: Done = false; break;
+ case '$': // $$ -> $
+ if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
+ O << '$';
+ ++LastEmitted; // Consume second '$' character.
+ break;
+ case '(': // $( -> same as GCC's { character.
+ ++LastEmitted; // Consume '(' character.
+ if (CurVariant != -1) {
+ llvm_report_error("Nested variants found in inline asm string: '"
+ + std::string(AsmStr) + "'");
+ }
+ CurVariant = 0; // We're in the first variant now.
+ break;
+ case '|':
+ ++LastEmitted; // consume '|' character.
+ if (CurVariant == -1)
+ O << '|'; // this is gcc's behavior for | outside a variant
+ else
+ ++CurVariant; // We're in the next variant.
+ break;
+ case ')': // $) -> same as GCC's } char.
+ ++LastEmitted; // consume ')' character.
+ if (CurVariant == -1)
+ O << '}'; // this is gcc's behavior for } outside a variant
+ else
+ CurVariant = -1;
+ break;
+ }
+ if (Done) break;
+
+ bool HasCurlyBraces = false;
+ if (*LastEmitted == '{') { // ${variable}
+ ++LastEmitted; // Consume '{' character.
+ HasCurlyBraces = true;
+ }
+
+ // If we have ${:foo}, then this is not a real operand reference, it is a
+ // "magic" string reference, just like in .td files. Arrange to call
+ // PrintSpecial.
+ 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); // We only accept numbers for IDs.
+ 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 we have curly braces, check for a modifier character. This
+ // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
+ if (*LastEmitted == ':') {
+ ++LastEmitted; // Consume ':' character.
+ if (*LastEmitted == 0) {
+ llvm_report_error("Bad ${:} expression in inline asm string: '"
+ + std::string(AsmStr) + "'");
+ }
+
+ Modifier[0] = *LastEmitted;
+ ++LastEmitted; // Consume modifier character.
+ }
+
+ if (*LastEmitted != '}') {
+ llvm_report_error("Bad ${} expression in inline asm string: '"
+ + std::string(AsmStr) + "'");
+ }
+ ++LastEmitted; // Consume '}' character.
+ }
+
+ if ((unsigned)Val >= NumOperands-1) {
+ llvm_report_error("Invalid $ operand number in inline asm string: '"
+ + std::string(AsmStr) + "'");
+ }
+
+ // Okay, we finally have a value number. Ask the target to print this
+ // operand!
+ if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
+ unsigned OpNo = 1;
+
+ bool Error = false;
+
+ // Scan to find the machine operand number for the operand.
+ 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; // Skip over the ID number.
+
+ if (Modifier[0] == 'l') // labels are target independent
+ O << *MI->getOperand(OpNo).getMBB()->getSymbol(OutContext);
+ 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();
+}
+
+/// printImplicitDef - This method prints the specified machine instruction
+/// that is an implicit def.
+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();
+}
+
+/// printLabel - This method prints a local label used by debug and
+/// exception handling tables.
+void AsmPrinter::printLabelInst(const MachineInstr *MI) const {
+ printLabel(MI->getOperand(0).getImm());
+ OutStreamer.AddBlankLine();
+}
+
+void AsmPrinter::printLabel(unsigned Id) const {
+ O << MAI->getPrivateGlobalPrefix() << "label" << Id << ':';
+}
+
+/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
+/// instruction, using the specified assembler variant. Targets should
+/// override this to format as appropriate.
+bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode) {
+ // Target doesn't support this yet!
+ return true;
+}
+
+bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ // Target doesn't support this yet!
+ return true;
+}
+
+MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const {
+ return GetBlockAddressSymbol(BA->getFunction(), BA->getBasicBlock());
+}
+
+MCSymbol *AsmPrinter::GetBlockAddressSymbol(const Function *F,
+ const BasicBlock *BB) const {
+ assert(BB->hasName() &&
+ "Address of anonymous basic block not supported yet!");
+
+ // This code must use the function name itself, and not the function number,
+ // since it must be possible to generate the label name from within other
+ // functions.
+ SmallString<60> FnName;
+ Mang->getNameWithPrefix(FnName, F, false);
+
+ // FIXME: THIS IS BROKEN IF THE LLVM BASIC BLOCK DOESN'T HAVE A NAME!
+ SmallString<60> NameResult;
+ Mang->getNameWithPrefix(NameResult,
+ StringRef("BA") + Twine((unsigned)FnName.size()) +
+ "_" + FnName.str() + "_" + BB->getName(),
+ Mangler::Private);
+
+ return OutContext.GetOrCreateSymbol(NameResult.str());
+}
+
+/// GetCPISymbol - Return the symbol for the specified constant pool entry.
+MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const {
+ SmallString<60> Name;
+ raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "CPI"
+ << getFunctionNumber() << '_' << CPID;
+ return OutContext.GetOrCreateSymbol(Name.str());
+}
+
+/// GetJTISymbol - Return the symbol for the specified jump table entry.
+MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const {
+ return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate);
+}
+
+/// GetJTSetSymbol - Return the symbol for the specified jump table .set
+/// FIXME: privatize to AsmPrinter.
+MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const {
+ SmallString<60> Name;
+ raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << UID << "_set_" << MBBID;
+ return OutContext.GetOrCreateSymbol(Name.str());
+}
+
+/// GetGlobalValueSymbol - Return the MCSymbol for the specified global
+/// value.
+MCSymbol *AsmPrinter::GetGlobalValueSymbol(const GlobalValue *GV) const {
+ SmallString<60> NameStr;
+ Mang->getNameWithPrefix(NameStr, GV, false);
+ return OutContext.GetOrCreateSymbol(NameStr.str());
+}
+
+/// GetSymbolWithGlobalValueBase - Return the MCSymbol for a symbol with
+/// global value name as its base, with the specified suffix, and where the
+/// symbol is forced to have private linkage if ForcePrivate is true.
+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());
+ return OutContext.GetOrCreateSymbol(NameStr.str());
+}
+
+/// GetExternalSymbolSymbol - Return the MCSymbol for the specified
+/// ExternalSymbol.
+MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const {
+ SmallString<60> NameStr;
+ Mang->getNameWithPrefix(NameStr, Sym);
+ return OutContext.GetOrCreateSymbol(NameStr.str());
+}
+
+
+
+/// PrintParentLoopComment - Print comments about parent loops of this one.
+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';
+}
+
+
+/// PrintChildLoopComment - Print comments about child loops within
+/// the loop for this basic block, with nesting.
+static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop,
+ unsigned FunctionNumber) {
+ // Add child loop information
+ 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);
+ }
+}
+
+/// PrintBasicBlockLoopComments - Pretty-print comments for basic blocks.
+static void PrintBasicBlockLoopComments(const MachineBasicBlock &MBB,
+ const MachineLoopInfo *LI,
+ const AsmPrinter &AP) {
+ // Add loop depth information
+ const MachineLoop *Loop = LI->getLoopFor(&MBB);
+ if (Loop == 0) return;
+
+ MachineBasicBlock *Header = Loop->getHeader();
+ assert(Header && "No header for loop");
+
+ // If this block is not a loop header, just print out what is the loop header
+ // and return.
+ if (Header != &MBB) {
+ AP.OutStreamer.AddComment(" in Loop: Header=BB" +
+ Twine(AP.getFunctionNumber())+"_" +
+ Twine(Loop->getHeader()->getNumber())+
+ " Depth="+Twine(Loop->getLoopDepth()));
+ return;
+ }
+
+ // Otherwise, it is a loop header. Print out information about child and
+ // parent loops.
+ 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());
+}
+
+
+/// EmitBasicBlockStart - This method prints the label for the specified
+/// MachineBasicBlock, an alignment (if present) and a comment describing
+/// it if appropriate.
+void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock *MBB) const {
+ // Emit an alignment directive for this block, if needed.
+ if (unsigned Align = MBB->getAlignment())
+ EmitAlignment(Log2_32(Align));
+
+ // If the block has its address taken, emit a special label to satisfy
+ // references to the block. This is done so that we don't need to
+ // remember the number of this label, and so that we can make
+ // forward references to labels without knowing what their numbers
+ // will be.
+ if (MBB->hasAddressTaken()) {
+ const BasicBlock *BB = MBB->getBasicBlock();
+ if (VerboseAsm)
+ OutStreamer.AddComment("Address Taken");
+ OutStreamer.EmitLabel(GetBlockAddressSymbol(BB->getParent(), BB));
+ }
+
+ // Print the main label for the block.
+ if (MBB->pred_empty() || MBB->isOnlyReachableByFallthrough()) {
+ if (VerboseAsm) {
+ // NOTE: Want this comment at start of line.
+ 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(OutContext));
+ }
+}
+
+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;
+}
+
+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;
+}
+