#define DEBUG_TYPE "asm-printer"
#include "llvm/CodeGen/AsmPrinter.h"
+#include "DwarfDebug.h"
+#include "DwarfException.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/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetAsmInfo.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/Assembly/Writer.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
+#include "llvm/Support/Timer.h"
using namespace llvm;
+static const char *DWARFGroupName = "DWARF Emission";
+static const char *DbgTimerName = "DWARF Debug Writer";
+static const char *EHTimerName = "DWARF Exception Writer";
+
STATISTIC(EmittedInsts, "Number of machine instrs printed");
char AsmPrinter::ID = 0;
}
+/// getGVAlignmentLog2 - Return the alignment to use for the specified global
+/// value in log2 form. This rounds up to the preferred alignment if possible
+/// and legal.
+static unsigned getGVAlignmentLog2(const GlobalValue *GV, const TargetData &TD,
+ unsigned InBits = 0) {
+ unsigned NumBits = 0;
+ if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV))
+ NumBits = TD.getPreferredAlignmentLog(GVar);
+
+ // If InBits is specified, round it to it.
+ if (InBits > NumBits)
+ NumBits = InBits;
+
+ // If the GV has a specified alignment, take it into account.
+ if (GV->getAlignment() == 0)
+ return NumBits;
+
+ unsigned GVAlign = Log2_32(GV->getAlignment());
+
+ // If the GVAlign is larger than NumBits, or if we are required to obey
+ // NumBits because the GV has an assigned section, obey it.
+ if (GVAlign > NumBits || GV->hasSection())
+ NumBits = GVAlign;
+ return NumBits;
+}
+
+
+
+
AsmPrinter::AsmPrinter(TargetMachine &tm, MCStreamer &Streamer)
- : MachineFunctionPass(&ID),
+ : MachineFunctionPass(ID),
TM(tm), MAI(tm.getMCAsmInfo()),
OutContext(Streamer.getContext()),
OutStreamer(Streamer),
LastMI(0), LastFn(0), Counter(~0U), SetCounter(0) {
- DW = 0; MMI = 0; LI = 0;
+ DD = 0; DE = 0; MMI = 0; LI = 0;
GCMetadataPrinters = 0;
VerboseAsm = Streamer.isVerboseAsm();
}
AsmPrinter::~AsmPrinter() {
+ assert(DD == 0 && DE == 0 && "Debug/EH info didn't get finalized");
+
if (GCMetadataPrinters != 0) {
gcp_map_type &GCMap = getGCMap(GCMetadataPrinters);
-
+
for (gcp_map_type::iterator I = GCMap.begin(), E = GCMap.end(); I != E; ++I)
delete I->second;
delete &GCMap;
GCMetadataPrinters = 0;
}
-
+
delete &OutStreamer;
}
return MF->getFunctionNumber();
}
-TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
+const TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
return TM.getTargetLowering()->getObjFileLowering();
}
MachineFunctionPass::getAnalysisUsage(AU);
AU.addRequired<MachineModuleInfo>();
AU.addRequired<GCModuleInfo>();
- AU.addRequired<DwarfWriter>();
if (isVerbose())
AU.addRequired<MachineLoopInfo>();
}
// Initialize TargetLoweringObjectFile.
const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
.Initialize(OutContext, TM);
-
+
Mang = new Mangler(OutContext, *TM.getTargetData());
-
+
// Allow the target to emit any magic that it wants at the start of the file.
EmitStartOfAsmFile(M);
if (!M.getModuleInlineAsm().empty()) {
OutStreamer.AddComment("Start of file scope inline assembly");
OutStreamer.AddBlankLine();
- EmitInlineAsm(M.getModuleInlineAsm());
+ EmitInlineAsm(M.getModuleInlineAsm()+"\n");
OutStreamer.AddComment("End of file scope inline assembly");
OutStreamer.AddBlankLine();
}
- DW = getAnalysisIfAvailable<DwarfWriter>();
- if (DW)
- DW->BeginModule(&M, this);
+ if (MAI->doesSupportDebugInformation())
+ DD = new DwarfDebug(this, &M);
+
+ if (MAI->doesSupportExceptionHandling())
+ switch (MAI->getExceptionHandlingType()) {
+ default:
+ case ExceptionHandling::DwarfTable:
+ DE = new DwarfTableException(this);
+ break;
+ case ExceptionHandling::DwarfCFI:
+ DE = new DwarfCFIException(this);
+ break;
+ case ExceptionHandling::ARM:
+ DE = new ARMException(this);
+ break;
+ }
return false;
}
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
- case GlobalValue::LinkerPrivateLinkage:
+ case GlobalValue::LinkerPrivateWeakLinkage:
+ case GlobalValue::LinkerPrivateWeakDefAutoLinkage:
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()) {
+
+ if ((GlobalValue::LinkageTypes)Linkage !=
+ GlobalValue::LinkerPrivateWeakDefAutoLinkage)
+ // .weak_definition _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
+ else
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefAutoPrivate);
+ } else if (MAI->getLinkOnceDirective() != 0) {
// .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.
- OutStreamer.EmitRawText(StringRef(LinkOnce));
+ //NOTE: linkonce is handled by the section the symbol was assigned to.
} else {
// .weak _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak);
break;
case GlobalValue::PrivateLinkage:
case GlobalValue::InternalLinkage:
+ case GlobalValue::LinkerPrivateLinkage:
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;
+ if (GV->hasInitializer()) {
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (EmitSpecialLLVMGlobal(GV))
+ return;
+
+ if (isVerbose()) {
+ WriteAsOperand(OutStreamer.GetCommentOS(), GV,
+ /*PrintType=*/false, GV->getParent());
+ OutStreamer.GetCommentOS() << '\n';
+ }
+ }
MCSymbol *GVSym = Mang->getSymbol(GV);
EmitVisibility(GVSym, GV->getVisibility());
+ if (!GV->hasInitializer()) // External globals require no extra code.
+ return;
+
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);
-
+ uint64_t Size = TD->getTypeAllocSize(GV->getType()->getElementType());
+
+ // If the alignment is specified, we *must* obey it. Overaligning a global
+ // with a specified alignment is a prompt way to break globals emitted to
+ // sections and expected to be contiguous (e.g. ObjC metadata).
+ unsigned AlignLog = getGVAlignmentLog2(GV, *TD);
+
// 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 (isVerbose()) {
- WriteAsOperand(OutStreamer.GetCommentOS(), GV,
- /*PrintType=*/false, GV->getParent());
- OutStreamer.GetCommentOS() << '\n';
- }
-
+
// Handle common symbols.
if (GVKind.isCommon()) {
+ unsigned Align = 1 << AlignLog;
+ if (!getObjFileLowering().getCommDirectiveSupportsAlignment())
+ Align = 0;
+
// .comm _foo, 42, 4
- OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog);
+ OutStreamer.EmitCommonSymbol(GVSym, Size, Align);
return;
}
-
+
// Handle local BSS symbols.
if (MAI->hasMachoZeroFillDirective()) {
const MCSection *TheSection =
OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
return;
}
-
+
if (MAI->hasLCOMMDirective()) {
// .lcomm _foo, 42
OutStreamer.EmitLocalCommonSymbol(GVSym, Size);
return;
}
-
+
+ unsigned Align = 1 << AlignLog;
+ if (!getObjFileLowering().getCommDirectiveSupportsAlignment())
+ Align = 0;
+
// .local _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local);
// .comm _foo, 42, 4
- OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog);
+ OutStreamer.EmitCommonSymbol(GVSym, Size, Align);
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()) {
+ if (Size == 0) Size = 1; // zerofill of 0 bytes is undefined.
+
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
// .zerofill __DATA, __common, _foo, 400, 5
return;
}
+ // Handle thread local data for mach-o which requires us to output an
+ // additional structure of data and mangle the original symbol so that we
+ // can reference it later.
+ //
+ // TODO: This should become an "emit thread local global" method on TLOF.
+ // All of this macho specific stuff should be sunk down into TLOFMachO and
+ // stuff like "TLSExtraDataSection" should no longer be part of the parent
+ // TLOF class. This will also make it more obvious that stuff like
+ // MCStreamer::EmitTBSSSymbol is macho specific and only called from macho
+ // specific code.
+ if (GVKind.isThreadLocal() && MAI->hasMachoTBSSDirective()) {
+ // Emit the .tbss symbol
+ MCSymbol *MangSym =
+ OutContext.GetOrCreateSymbol(GVSym->getName() + Twine("$tlv$init"));
+
+ if (GVKind.isThreadBSS())
+ OutStreamer.EmitTBSSSymbol(TheSection, MangSym, Size, 1 << AlignLog);
+ else if (GVKind.isThreadData()) {
+ OutStreamer.SwitchSection(TheSection);
+
+ EmitAlignment(AlignLog, GV);
+ OutStreamer.EmitLabel(MangSym);
+
+ EmitGlobalConstant(GV->getInitializer());
+ }
+
+ OutStreamer.AddBlankLine();
+
+ // Emit the variable struct for the runtime.
+ const MCSection *TLVSect
+ = getObjFileLowering().getTLSExtraDataSection();
+
+ OutStreamer.SwitchSection(TLVSect);
+ // Emit the linkage here.
+ EmitLinkage(GV->getLinkage(), GVSym);
+ OutStreamer.EmitLabel(GVSym);
+
+ // Three pointers in size:
+ // - __tlv_bootstrap - used to make sure support exists
+ // - spare pointer, used when mapped by the runtime
+ // - pointer to mangled symbol above with initializer
+ unsigned PtrSize = TD->getPointerSizeInBits()/8;
+ OutStreamer.EmitSymbolValue(GetExternalSymbolSymbol("_tlv_bootstrap"),
+ PtrSize, 0);
+ OutStreamer.EmitIntValue(0, PtrSize, 0);
+ OutStreamer.EmitSymbolValue(MangSym, PtrSize, 0);
+
+ OutStreamer.AddBlankLine();
+ return;
+ }
+
OutStreamer.SwitchSection(TheSection);
EmitLinkage(GV->getLinkage(), GVSym);
EmitAlignment(AlignLog, GV);
- if (isVerbose()) {
- 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();
}
void AsmPrinter::EmitFunctionHeader() {
// Print out constants referenced by the function
EmitConstantPool();
-
+
// Print the 'header' of function.
const Function *F = MF->getFunction();
// Emit the CurrentFnSym. This is a virtual function to allow targets to
// do their wild and crazy things as required.
EmitFunctionEntryLabel();
-
+
// If the function had address-taken blocks that got deleted, then we have
// references to the dangling symbols. Emit them at the start of the function
// so that we don't get references to undefined symbols.
OutStreamer.AddComment("Address taken block that was later removed");
OutStreamer.EmitLabel(DeadBlockSyms[i]);
}
-
+
// Add some workaround for linkonce linkage on Cygwin\MinGW.
if (MAI->getLinkOnceDirective() != 0 &&
(F->hasLinkOnceLinkage() || F->hasWeakLinkage())) {
// FIXME: What is this?
- MCSymbol *FakeStub =
+ MCSymbol *FakeStub =
OutContext.GetOrCreateSymbol(Twine("Lllvm$workaround$fake$stub$")+
CurrentFnSym->getName());
OutStreamer.EmitLabel(FakeStub);
}
-
+
// Emit pre-function debug and/or EH information.
- if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
- DW->BeginFunction(MF);
+ if (DE) {
+ NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled);
+ DE->BeginFunction(MF);
+ }
+ if (DD) {
+ NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
+ DD->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);
+ // The function label could have already been emitted if two symbols end up
+ // conflicting due to asm renaming. Detect this and emit an error.
+ if (CurrentFnSym->isUndefined())
+ return OutStreamer.EmitLabel(CurrentFnSym);
+
+ report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
+ "' label emitted multiple times to assembly file");
}
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()) { // Print source line info.
- DIScope Scope(DL.getScope(MF->getFunction()->getContext()));
- // Omit the directory, because it's likely to be long and uninteresting.
- if (Scope.Verify())
- CommentOS << Scope.getFilename();
- else
- CommentOS << "<unknown>";
- CommentOS << ':' << DL.getLine();
- if (DL.getCol() != 0)
- CommentOS << ':' << DL.getCol();
- 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 (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";
- }
+ if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse))
+ CommentOS << " Reload Reuse\n";
}
/// EmitImplicitDef - This method emits the specified machine instruction
AP.OutStreamer.AddBlankLine();
}
+/// EmitDebugValueComment - This method handles the target-independent form
+/// of DBG_VALUE, returning true if it was able to do so. A false return
+/// means the target will need to handle MI in EmitInstruction.
+static bool EmitDebugValueComment(const MachineInstr *MI, AsmPrinter &AP) {
+ // This code handles only the 3-operand target-independent form.
+ if (MI->getNumOperands() != 3)
+ return false;
+
+ SmallString<128> Str;
+ raw_svector_ostream OS(Str);
+ OS << '\t' << AP.MAI->getCommentString() << "DEBUG_VALUE: ";
+
+ // cast away const; DIetc do not take const operands for some reason.
+ DIVariable V(const_cast<MDNode*>(MI->getOperand(2).getMetadata()));
+ if (V.getContext().isSubprogram())
+ OS << DISubprogram(V.getContext()).getDisplayName() << ":";
+ OS << V.getName() << " <- ";
+
+ // Register or immediate value. Register 0 means undef.
+ if (MI->getOperand(0).isFPImm()) {
+ APFloat APF = APFloat(MI->getOperand(0).getFPImm()->getValueAPF());
+ if (MI->getOperand(0).getFPImm()->getType()->isFloatTy()) {
+ OS << (double)APF.convertToFloat();
+ } else if (MI->getOperand(0).getFPImm()->getType()->isDoubleTy()) {
+ OS << APF.convertToDouble();
+ } else {
+ // There is no good way to print long double. Convert a copy to
+ // double. Ah well, it's only a comment.
+ bool ignored;
+ APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
+ &ignored);
+ OS << "(long double) " << APF.convertToDouble();
+ }
+ } else if (MI->getOperand(0).isImm()) {
+ OS << MI->getOperand(0).getImm();
+ } else {
+ assert(MI->getOperand(0).isReg() && "Unknown operand type");
+ if (MI->getOperand(0).getReg() == 0) {
+ // Suppress offset, it is not meaningful here.
+ OS << "undef";
+ // NOTE: Want this comment at start of line, don't emit with AddComment.
+ AP.OutStreamer.EmitRawText(OS.str());
+ return true;
+ }
+ OS << AP.TM.getRegisterInfo()->getName(MI->getOperand(0).getReg());
+ }
+
+ OS << '+' << MI->getOperand(1).getImm();
+ // NOTE: Want this comment at start of line, don't emit with AddComment.
+ AP.OutStreamer.EmitRawText(OS.str());
+ return true;
+}
+
+bool AsmPrinter::needsCFIMoves() {
+ if (UnwindTablesMandatory)
+ return true;
+
+ if (MMI->hasDebugInfo() && !MAI->doesDwarfRequireFrameSection())
+ return true;
+
+ if (MF->getFunction()->doesNotThrow())
+ return false;
+
+ return true;
+}
+
+void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
+ MCSymbol *Label = MI.getOperand(0).getMCSymbol();
+
+ if (MAI->doesDwarfRequireFrameSection() ||
+ MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI)
+ OutStreamer.EmitLabel(Label);
+
+ if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI)
+ return;
+
+ if (!needsCFIMoves())
+ return;
+ MachineModuleInfo &MMI = MF->getMMI();
+ std::vector<MachineMove> &Moves = MMI.getFrameMoves();
+ bool FoundOne = false;
+ (void)FoundOne;
+ for (std::vector<MachineMove>::iterator I = Moves.begin(),
+ E = Moves.end(); I != E; ++I) {
+ if (I->getLabel() == Label) {
+ EmitCFIFrameMove(*I);
+ FoundOne = true;
+ }
+ }
+ assert(FoundOne);
+}
/// EmitFunctionBody - This method emits the body and trailer for a
/// function.
void AsmPrinter::EmitFunctionBody() {
// Emit target-specific gunk before the function body.
EmitFunctionBodyStart();
-
- bool ShouldPrintDebugScopes =
- DW && MAI->doesSupportDebugInformation() &&DW->ShouldEmitDwarfDebug();
-
+
+ bool ShouldPrintDebugScopes = DD && MMI->hasDebugInfo();
+
// Print out code for the function.
bool HasAnyRealCode = false;
+ const MachineInstr *LastMI = 0;
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) {
+ LastMI = II;
+
// Print the assembly for the instruction.
- if (!II->isLabel())
+ if (!II->isLabel() && !II->isImplicitDef() && !II->isKill() &&
+ !II->isDebugValue()) {
HasAnyRealCode = true;
-
- ++EmittedInsts;
-
- if (ShouldPrintDebugScopes)
- DW->BeginScope(II);
-
+ ++EmittedInsts;
+ }
+
+ if (ShouldPrintDebugScopes) {
+ NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
+ DD->beginInstruction(II);
+ }
+
if (isVerbose())
EmitComments(*II, OutStreamer.GetCommentOS());
switch (II->getOpcode()) {
- case TargetOpcode::DBG_LABEL:
+ case TargetOpcode::PROLOG_LABEL:
+ emitPrologLabel(*II);
+ break;
+
case TargetOpcode::EH_LABEL:
case TargetOpcode::GC_LABEL:
OutStreamer.EmitLabel(II->getOperand(0).getMCSymbol());
case TargetOpcode::INLINEASM:
EmitInlineAsm(II);
break;
+ case TargetOpcode::DBG_VALUE:
+ if (isVerbose()) {
+ if (!EmitDebugValueComment(II, *this))
+ EmitInstruction(II);
+ }
+ break;
case TargetOpcode::IMPLICIT_DEF:
if (isVerbose()) EmitImplicitDef(II, *this);
break;
if (isVerbose()) EmitKill(II, *this);
break;
default:
+ if (!TM.hasMCUseLoc())
+ MCLineEntry::Make(&OutStreamer, getCurrentSection());
+
EmitInstruction(II);
break;
}
-
- if (ShouldPrintDebugScopes)
- DW->EndScope(II);
+
+ if (ShouldPrintDebugScopes) {
+ NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
+ DD->endInstruction(II);
+ }
}
}
-
+
+ // If the last instruction was a prolog label, then we have a situation where
+ // we emitted a prolog but no function body. This results in the ending prolog
+ // label equaling the end of function label and an invalid "row" in the
+ // FDE. We need to emit a noop in this situation so that the FDE's rows are
+ // valid.
+ bool RequiresNoop = LastMI && LastMI->isPrologLabel();
+
// 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*/);
-
+ // labels from collapsing together. Just emit a noop.
+ if ((MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode) || RequiresNoop) {
+ MCInst Noop;
+ TM.getInstrInfo()->getNoopForMachoTarget(Noop);
+ if (Noop.getOpcode()) {
+ OutStreamer.AddComment("avoids zero-length function");
+ OutStreamer.EmitInstruction(Noop);
+ } else // Target not mc-ized yet.
+ OutStreamer.EmitRawText(StringRef("\tnop\n"));
+ }
+
// Emit target-specific gunk after the function body.
EmitFunctionBodyEnd();
-
+
// If the target wants a .size directive for the size of the function, emit
// it.
if (MAI->hasDotTypeDotSizeDirective()) {
// difference between the function label and the temp label.
MCSymbol *FnEndLabel = OutContext.CreateTempSymbol();
OutStreamer.EmitLabel(FnEndLabel);
-
+
const MCExpr *SizeExp =
MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(FnEndLabel, OutContext),
MCSymbolRefExpr::Create(CurrentFnSym, OutContext),
OutContext);
OutStreamer.EmitELFSize(CurrentFnSym, SizeExp);
}
-
+
// Emit post-function debug information.
- if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
- DW->EndFunction(MF);
-
+ if (DD) {
+ NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
+ DD->endFunction(MF);
+ }
+ if (DE) {
+ NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled);
+ DE->EndFunction();
+ }
+ MMI->EndFunction();
+
// Print out jump tables referenced by the function.
EmitJumpTableInfo();
-
+
OutStreamer.AddBlankLine();
}
+/// getDebugValueLocation - Get location information encoded by DBG_VALUE
+/// operands.
+MachineLocation AsmPrinter::
+getDebugValueLocation(const MachineInstr *MI) const {
+ // Target specific DBG_VALUE instructions are handled by each target.
+ return MachineLocation();
+}
+
+/// getDwarfRegOpSize - get size required to emit given machine location using
+/// dwarf encoding.
+unsigned AsmPrinter::getDwarfRegOpSize(const MachineLocation &MLoc) const {
+ const TargetRegisterInfo *RI = TM.getRegisterInfo();
+ unsigned DWReg = RI->getDwarfRegNum(MLoc.getReg(), false);
+ if (int Offset = MLoc.getOffset()) {
+ // If the value is at a certain offset from frame register then
+ // use DW_OP_breg.
+ if (DWReg < 32)
+ return 1 + MCAsmInfo::getSLEB128Size(Offset);
+ else
+ return 1 + MCAsmInfo::getULEB128Size(MLoc.getReg())
+ + MCAsmInfo::getSLEB128Size(Offset);
+ }
+ if (DWReg < 32)
+ return 1;
+
+ return 1 + MCAsmInfo::getULEB128Size(DWReg);
+}
+
+/// EmitDwarfRegOp - Emit dwarf register operation.
+void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const {
+ const TargetRegisterInfo *TRI = TM.getRegisterInfo();
+ unsigned Reg = TRI->getDwarfRegNum(MLoc.getReg(), false);
+ if (int Offset = MLoc.getOffset()) {
+ if (Reg < 32) {
+ OutStreamer.AddComment(
+ dwarf::OperationEncodingString(dwarf::DW_OP_breg0 + Reg));
+ EmitInt8(dwarf::DW_OP_breg0 + Reg);
+ } else {
+ OutStreamer.AddComment("DW_OP_bregx");
+ EmitInt8(dwarf::DW_OP_bregx);
+ OutStreamer.AddComment(Twine(Reg));
+ EmitULEB128(Reg);
+ }
+ EmitSLEB128(Offset);
+ } else {
+ if (Reg < 32) {
+ OutStreamer.AddComment(
+ dwarf::OperationEncodingString(dwarf::DW_OP_reg0 + Reg));
+ EmitInt8(dwarf::DW_OP_reg0 + Reg);
+ } else {
+ OutStreamer.AddComment("DW_OP_regx");
+ EmitInt8(dwarf::DW_OP_regx);
+ OutStreamer.AddComment(Twine(Reg));
+ EmitULEB128(Reg);
+ }
+ }
+}
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();
-
+
+ // Emit visibility info for declarations
+ for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
+ const Function &F = *I;
+ if (!F.isDeclaration())
+ continue;
+ GlobalValue::VisibilityTypes V = F.getVisibility();
+ if (V == GlobalValue::DefaultVisibility)
+ continue;
+
+ MCSymbol *Name = Mang->getSymbol(&F);
+ EmitVisibility(Name, V, false);
+ }
+
+ // Finalize debug and EH information.
+ if (DE) {
+ {
+ NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled);
+ DE->EndModule();
+ }
+ delete DE; DE = 0;
+ }
+ if (DD) {
+ {
+ NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
+ DD->endModule();
+ }
+ delete DD; DD = 0;
+ }
+
// 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
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);
EmitVisibility(Name, I->getVisibility());
// Emit the directives as assignments aka .set:
- OutStreamer.EmitAssignment(Name,
+ OutStreamer.EmitAssignment(Name,
MCSymbolRefExpr::Create(Target, OutContext));
}
}
// 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))
+ if (const 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;
-
+ MMI = 0;
+
OutStreamer.Finish();
return false;
}
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");
}
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;
const Type *Ty = CPE.getType();
Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
-
- // Emit the label with a comment on it.
- if (isVerbose()) {
- OutStreamer.GetCommentOS() << "constant pool ";
- WriteTypeSymbolic(OutStreamer.GetCommentOS(), CPE.getType(),
- MF->getFunction()->getParent());
- OutStreamer.GetCommentOS() << '\n';
- }
OutStreamer.EmitLabel(GetCPISymbol(CPI));
if (CPE.isMachineConstantPoolEntry())
}
/// EmitJumpTableInfo - Print assembly representations of the jump tables used
-/// by the current function to the current output stream.
+/// by the current function to the current output stream.
///
void AsmPrinter::EmitJumpTableInfo() {
const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
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
+ // 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;
OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F,Mang,TM));
} else {
// Otherwise, drop it in the readonly section.
- const MCSection *ReadOnlySection =
+ 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 this jump table was deleted, ignore it.
if (JTBBs.empty()) continue;
// For the EK_LabelDifference32 entry, if the target supports .set, emit a
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);
OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()),
MCBinaryExpr::CreateSub(LHS, Base, OutContext));
}
- }
-
- // On some targets (e.g. Darwin) we want to emit two consequtive labels
+ }
+
+ // On some targets (e.g. Darwin) we want to emit two consecutive 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.
void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
const MachineBasicBlock *MBB,
unsigned UID) const {
+ assert(MBB && MBB->getNumber() >= 0 && "Invalid basic block");
const MCExpr *Value = 0;
switch (MJTI->getEntryKind()) {
case MachineJumpTableInfo::EK_Inline:
// 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
+
+ // 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()) {
break;
}
}
-
+
assert(Value && "Unknown entry kind!");
-
+
unsigned EntrySize = MJTI->getEntrySize(*TM.getTargetData());
OutStreamer.EmitValue(Value, EntrySize, /*addrspace*/0);
}
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);
+ EmitAlignment(Align);
EmitXXStructorList(GV->getInitializer());
-
+
if (TM.getRelocationModel() == Reloc::Static &&
MAI->hasStaticCtorDtorReferenceInStaticMode()) {
StringRef Sym(".constructors_used");
MCSA_Reference);
}
return true;
- }
-
+ }
+
if (GV->getName() == "llvm.global_dtors") {
OutStreamer.SwitchSection(getObjFileLowering().getStaticDtorSection());
- EmitAlignment(Align, 0);
+ EmitAlignment(Align);
EmitXXStructorList(GV->getInitializer());
if (TM.getRelocationModel() == Reloc::Static &&
}
return true;
}
-
+
return false;
}
// 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());
}
}
-/// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
+/// 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
void AsmPrinter::EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
unsigned Size) const {
// Get the Hi-Lo expression.
- const MCExpr *Diff =
+ const MCExpr *Diff =
MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(Hi, OutContext),
MCSymbolRefExpr::Create(Lo, OutContext),
OutContext);
-
+
if (!MAI->hasSetDirective()) {
OutStreamer.EmitValue(Diff, Size, 0/*AddrSpace*/);
return;
OutStreamer.EmitSymbolValue(SetLabel, Size, 0/*AddrSpace*/);
}
+/// EmitLabelOffsetDifference - Emit something like ".long Hi+Offset-Lo"
+/// where the size in bytes of the directive is specified by Size and Hi/Lo
+/// specify the labels. This implicitly uses .set if it is available.
+void AsmPrinter::EmitLabelOffsetDifference(const MCSymbol *Hi, uint64_t Offset,
+ const MCSymbol *Lo, unsigned Size)
+ const {
+
+ // Emit Hi+Offset - Lo
+ // Get the Hi+Offset expression.
+ const MCExpr *Plus =
+ MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(Hi, OutContext),
+ MCConstantExpr::Create(Offset, OutContext),
+ OutContext);
+
+ // Get the Hi+Offset-Lo expression.
+ const MCExpr *Diff =
+ MCBinaryExpr::CreateSub(Plus,
+ MCSymbolRefExpr::Create(Lo, OutContext),
+ OutContext);
+
+ if (!MAI->hasSetDirective())
+ OutStreamer.EmitValue(Diff, 4, 0/*AddrSpace*/);
+ else {
+ // Otherwise, emit with .set (aka assignment).
+ MCSymbol *SetLabel = GetTempSymbol("set", SetCounter++);
+ OutStreamer.EmitAssignment(SetLabel, Diff);
+ OutStreamer.EmitSymbolValue(SetLabel, 4, 0/*AddrSpace*/);
+ }
+}
+
+/// EmitLabelPlusOffset - Emit something like ".long Label+Offset"
+/// where the size in bytes of the directive is specified by Size and Label
+/// specifies the label. This implicitly uses .set if it is available.
+void AsmPrinter::EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset,
+ unsigned Size)
+ const {
+
+ // Emit Label+Offset
+ const MCExpr *Plus =
+ MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(Label, OutContext),
+ MCConstantExpr::Create(Offset, OutContext),
+ OutContext);
+
+ OutStreamer.EmitValue(Plus, 4, 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.
+// an explicit alignment requested, it will override the alignment request
+// if required for correctness.
//
-// 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.
-
+void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV) const {
+ if (GV) NumBits = getGVAlignmentLog2(GV, *TM.getTargetData(), NumBits);
+
+ if (NumBits == 0) return; // 1-byte aligned: no need to emit alignment.
+
if (getCurrentSection()->getKind().isText())
OutStreamer.EmitCodeAlignment(1 << NumBits);
else
OutStreamer.EmitValueToAlignment(1 << NumBits, 0, 1, 0);
}
+//===----------------------------------------------------------------------===//
+// Constant emission.
+//===----------------------------------------------------------------------===//
+
/// 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.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 the code isn't optimized, there may be outstanding folding
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");
+
+ // Otherwise report the problem to the user.
+ {
+ std::string S;
+ raw_string_ostream OS(S);
+ OS << "Unsupported expression in static initializer: ";
+ WriteAsOperand(OS, CE, /*PrintType=*/false,
+ !AP.MF ? 0 : AP.MF->getFunction()->getParent());
+ report_fatal_error(OS.str());
+ }
+ return MCConstantExpr::Create(0, Ctx);
case Instruction::GetElementPtr: {
const TargetData &TD = *AP.TM.getTargetData();
// Generate a symbolic expression for the byte address
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
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
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:
}
}
+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()) {
// 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);
+ EmitGlobalConstantImpl(CA->getOperand(i), AddrSpace, AP);
return;
}
-
+
// Otherwise, it can be emitted as .ascii.
SmallVector<char, 128> TmpVec;
TmpVec.reserve(CA->getNumOperands());
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);
+ EmitGlobalConstantImpl(CV->getOperand(i), AddrSpace, AP);
}
static void EmitGlobalConstantStruct(const ConstantStruct *CS,
SizeSoFar += FieldSize + PadSize;
// Now print the actual field value.
- AP.EmitGlobalConstant(Field, AddrSpace);
+ EmitGlobalConstantImpl(Field, AddrSpace, AP);
// 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
"Layout of constant struct may be incorrect!");
}
-static void EmitGlobalConstantUnion(const ConstantUnion *CU,
- unsigned AddrSpace, AsmPrinter &AP) {
- const TargetData *TD = AP.TM.getTargetData();
- unsigned Size = TD->getTypeAllocSize(CU->getType());
-
- const Constant *Contents = CU->getOperand(0);
- unsigned FilledSize = TD->getTypeAllocSize(Contents->getType());
-
- // Print the actually filled part
- AP.EmitGlobalConstant(Contents, AddrSpace);
-
- // And pad with enough zeroes
- AP.OutStreamer.EmitZeros(Size-FilledSize, AddrSpace);
-}
-
static void EmitGlobalConstantFP(const ConstantFP *CFP, unsigned AddrSpace,
AsmPrinter &AP) {
// FP Constants are printed as integer constants to avoid losing
AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace);
return;
}
-
+
if (CFP->getType()->isFloatTy()) {
if (AP.isVerbose()) {
float Val = CFP->getValueAPF().convertToFloat();
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
+ // API needed to prevent premature destruction
APInt API = CFP->getValueAPF().bitcastToAPInt();
const uint64_t *p = API.getRawData();
if (AP.isVerbose()) {
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);
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.
+ // 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()) {
}
}
-/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
-void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
+static void EmitGlobalConstantImpl(const Constant *CV, unsigned AddrSpace,
+ AsmPrinter &AP) {
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);
+ 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 = TM.getTargetData()->getTypeAllocSize(CV->getType());
+ unsigned Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType());
switch (Size) {
case 1:
case 2:
case 4:
case 8:
- if (isVerbose())
- OutStreamer.GetCommentOS() << format("0x%llx\n", CI->getZExtValue());
- OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace);
+ if (AP.isVerbose())
+ AP.OutStreamer.GetCommentOS() << format("0x%llx\n", CI->getZExtValue());
+ AP.OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace);
return;
default:
- EmitGlobalConstantLargeInt(CI, AddrSpace, *this);
+ EmitGlobalConstantLargeInt(CI, AddrSpace, AP);
return;
}
}
-
+
if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV))
- return EmitGlobalConstantArray(CVA, AddrSpace, *this);
-
+ return EmitGlobalConstantArray(CVA, AddrSpace, AP);
+
if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
- return EmitGlobalConstantStruct(CVS, AddrSpace, *this);
+ return EmitGlobalConstantStruct(CVS, AddrSpace, AP);
if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
- return EmitGlobalConstantFP(CFP, AddrSpace, *this);
+ return EmitGlobalConstantFP(CFP, AddrSpace, AP);
if (isa<ConstantPointerNull>(CV)) {
- unsigned Size = TM.getTargetData()->getTypeAllocSize(CV->getType());
- OutStreamer.EmitIntValue(0, Size, AddrSpace);
+ unsigned Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType());
+ AP.OutStreamer.EmitIntValue(0, Size, AddrSpace);
return;
}
-
- if (const ConstantUnion *CVU = dyn_cast<ConstantUnion>(CV))
- return EmitGlobalConstantUnion(CVU, AddrSpace, *this);
-
+
if (const ConstantVector *V = dyn_cast<ConstantVector>(CV))
- return EmitGlobalConstantVector(V, AddrSpace, *this);
-
+ return EmitGlobalConstantVector(V, AddrSpace, AP);
+
// 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);
+ AP.OutStreamer.EmitValue(LowerConstant(CV, AP),
+ AP.TM.getTargetData()->getTypeAllocSize(CV->getType()),
+ AddrSpace);
+}
+
+/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
+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()) {
+ // If the global has zero size, emit a single byte so that two labels don't
+ // look like they are at the same location.
+ OutStreamer.EmitIntValue(0, 1, AddrSpace);
+ }
}
void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
SmallString<60> NameStr;
Mang->getNameWithPrefix(NameStr, Sym);
return OutContext.GetOrCreateSymbol(NameStr.str());
-}
+}
// 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) {
" 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());
-
+
+ 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());
}
const BasicBlock *BB = MBB->getBasicBlock();
if (isVerbose())
OutStreamer.AddComment("Block address taken");
-
+
std::vector<MCSymbol*> Syms = MMI->getAddrLabelSymbolToEmit(BB);
for (unsigned i = 0, e = Syms.size(); i != e; ++i)
if (const BasicBlock *BB = MBB->getBasicBlock())
if (BB->hasName())
OutStreamer.AddComment("%" + BB->getName());
-
+
EmitBasicBlockLoopComments(*MBB, LI, *this);
-
+
// NOTE: Want this comment at start of line, don't emit with AddComment.
OutStreamer.EmitRawText(Twine(MAI->getCommentString()) + " BB#" +
Twine(MBB->getNumber()) + ":");
}
}
-void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility) const {
+void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility,
+ bool IsDefinition) const {
MCSymbolAttr Attr = MCSA_Invalid;
-
+
switch (Visibility) {
default: break;
case GlobalValue::HiddenVisibility:
- Attr = MAI->getHiddenVisibilityAttr();
+ if (IsDefinition)
+ Attr = MAI->getHiddenVisibilityAttr();
+ else
+ Attr = MAI->getHiddenDeclarationVisibilityAttr();
break;
case GlobalValue::ProtectedVisibility:
Attr = MAI->getProtectedVisibilityAttr();
// then nothing falls through to it.
if (MBB->isLandingPad() || MBB->pred_empty())
return false;
-
+
// If there isn't exactly one predecessor, it can't be a fall through.
MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI;
++PI2;
if (PI2 != MBB->pred_end())
return false;
-
+
// The predecessor has to be immediately before this block.
const MachineBasicBlock *Pred = *PI;
-
+
if (!Pred->isLayoutSuccessor(MBB))
return false;
-
+
// If the block is completely empty, then it definitely does fall through.
if (Pred->empty())
return true;
-
+
// Otherwise, check the last instruction.
const MachineInstr &LastInst = Pred->back();
return !LastInst.getDesc().isBarrier();
gcp_map_type::iterator GCPI = GCMap.find(S);
if (GCPI != GCMap.end())
return GCPI->second;
-
+
const char *Name = S->getName().c_str();
-
+
for (GCMetadataPrinterRegistry::iterator
I = GCMetadataPrinterRegistry::begin(),
E = GCMetadataPrinterRegistry::end(); I != E; ++I)
GCMap.insert(std::make_pair(S, GMP));
return GMP;
}
-
- llvm_report_error("no GCMetadataPrinter registered for GC: " + Twine(Name));
+
+ report_fatal_error("no GCMetadataPrinter registered for GC: " + Twine(Name));
return 0;
}
projects / oota-llvm.git / blobdiff