#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Transforms/Utils/GlobalStatus.h"
using namespace llvm;
static const char *const DWARFGroupName = "DWARF Emission";
OutStreamer.InitStreamer();
- Mang = new Mangler(OutContext, &TM);
+ Mang = new Mangler(&TM);
// Allow the target to emit any magic that it wants at the start of the file.
EmitStartOfAsmFile(M);
llvm_unreachable("Unknown exception type.");
}
-void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const {
- switch ((GlobalValue::LinkageTypes)Linkage) {
+void AsmPrinter::EmitLinkage(const GlobalValue *GV, MCSymbol *GVSym) const {
+ GlobalValue::LinkageTypes Linkage = GV->getLinkage();
+ switch (Linkage) {
case GlobalValue::CommonLinkage:
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
- if ((GlobalValue::LinkageTypes)Linkage !=
- GlobalValue::LinkOnceODRAutoHideLinkage)
+
+ bool CanBeHidden = Linkage == GlobalValue::LinkOnceODRAutoHideLinkage;
+
+ if (!CanBeHidden && Linkage == GlobalValue::LinkOnceODRLinkage) {
+ if (GV->hasUnnamedAddr()) {
+ CanBeHidden = true;
+ } else {
+ GlobalStatus GS;
+ if (!GlobalStatus::analyzeGlobal(GV, GS) && !GS.IsCompared)
+ CanBeHidden = true;
+ }
+ }
+
+ if (!CanBeHidden)
// .weak_definition _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
else
// .weak _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak);
}
- break;
+ return;
case GlobalValue::DLLExportLinkage:
case GlobalValue::AppendingLinkage:
// FIXME: appending linkage variables should go into a section of
// If external or appending, declare as a global symbol.
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
- break;
+ return;
case GlobalValue::PrivateLinkage:
case GlobalValue::InternalLinkage:
case GlobalValue::LinkerPrivateLinkage:
- break;
- default:
- llvm_unreachable("Unknown linkage type!");
+ return;
+ case GlobalValue::AvailableExternallyLinkage:
+ llvm_unreachable("Should never emit this");
+ case GlobalValue::DLLImportLinkage:
+ case GlobalValue::ExternalWeakLinkage:
+ llvm_unreachable("Don't know how to emit these");
}
+ llvm_unreachable("Unknown linkage type!");
}
+MCSymbol *AsmPrinter::getSymbol(const GlobalValue *GV) const {
+ return getObjFileLowering().getSymbol(*Mang, GV);
+}
/// EmitGlobalVariable - Emit the specified global variable to the .s file.
void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
}
}
- MCSymbol *GVSym = Mang->getSymbol(GV);
+ MCSymbol *GVSym = getSymbol(GV);
EmitVisibility(GVSym, GV->getVisibility(), !GV->isDeclaration());
if (!GV->hasInitializer()) // External globals require no extra code.
OutStreamer.SwitchSection(TLVSect);
// Emit the linkage here.
- EmitLinkage(GV->getLinkage(), GVSym);
+ EmitLinkage(GV, GVSym);
OutStreamer.EmitLabel(GVSym);
// Three pointers in size:
OutStreamer.SwitchSection(TheSection);
- EmitLinkage(GV->getLinkage(), GVSym);
+ EmitLinkage(GV, GVSym);
EmitAlignment(AlignLog, GV);
OutStreamer.EmitLabel(GVSym);
OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
EmitVisibility(CurrentFnSym, F->getVisibility());
- EmitLinkage(F->getLinkage(), CurrentFnSym);
+ EmitLinkage(F, CurrentFnSym);
EmitAlignment(MF->getAlignment(), F);
if (MAI->hasDotTypeDotSizeDirective())
OutStreamer.EmitLabel(DeadBlockSyms[i]);
}
- // Emit the prefix data.
- if (F->hasPrefixData())
- EmitGlobalConstant(F->getPrefixData());
-
// Emit pre-function debug and/or EH information.
if (DE) {
NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled);
NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
DD->beginFunction(MF);
}
+
+ // Emit the prefix data.
+ if (F->hasPrefixData())
+ EmitGlobalConstant(F->getPrefixData());
}
/// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the
/// emitImplicitDef - This method emits the specified machine instruction
/// that is an implicit def.
-static void emitImplicitDef(const MachineInstr *MI, AsmPrinter &AP) {
+void AsmPrinter::emitImplicitDef(const MachineInstr *MI) const {
unsigned RegNo = MI->getOperand(0).getReg();
- AP.OutStreamer.AddComment(Twine("implicit-def: ") +
- AP.TM.getRegisterInfo()->getName(RegNo));
- AP.OutStreamer.AddBlankLine();
+ OutStreamer.AddComment(Twine("implicit-def: ") +
+ TM.getRegisterInfo()->getName(RegNo));
+ OutStreamer.AddBlankLine();
}
static void emitKill(const MachineInstr *MI, AsmPrinter &AP) {
}
break;
case TargetOpcode::IMPLICIT_DEF:
- if (isVerbose()) emitImplicitDef(II, *this);
+ if (isVerbose()) emitImplicitDef(II);
break;
case TargetOpcode::KILL:
if (isVerbose()) emitKill(II, *this);
if (V == GlobalValue::DefaultVisibility)
continue;
- MCSymbol *Name = Mang->getSymbol(&F);
+ MCSymbol *Name = getSymbol(&F);
EmitVisibility(Name, V, false);
}
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
if (!I->hasExternalWeakLinkage()) continue;
- OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference);
+ OutStreamer.EmitSymbolAttribute(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);
+ OutStreamer.EmitSymbolAttribute(getSymbol(I), MCSA_WeakReference);
}
}
OutStreamer.AddBlankLine();
for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
I != E; ++I) {
- MCSymbol *Name = Mang->getSymbol(I);
+ MCSymbol *Name = getSymbol(I);
const GlobalValue *GV = I->getAliasedGlobal();
- MCSymbol *Target = Mang->getSymbol(GV);
+ MCSymbol *Target = getSymbol(GV);
if (I->hasExternalLinkage() || !MAI->getWeakRefDirective())
OutStreamer.EmitSymbolAttribute(Name, MCSA_Global);
- else if (I->hasWeakLinkage())
+ else if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference);
else
assert(I->hasLocalLinkage() && "Invalid alias linkage");
if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
MP->finishAssembly(*this);
+ // Emit llvm.ident metadata in an '.ident' directive.
+ EmitModuleIdents(M);
+
// 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");
void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
this->MF = &MF;
// Get the function symbol.
- CurrentFnSym = Mang->getSymbol(MF.getFunction());
+ CurrentFnSym = getSymbol(MF.getFunction());
CurrentFnSymForSize = CurrentFnSym;
if (isVerbose())
const GlobalValue *GV =
dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang))
- OutStreamer.EmitSymbolAttribute(Mang->getSymbol(GV), MCSA_NoDeadStrip);
+ OutStreamer.EmitSymbolAttribute(getSymbol(GV), MCSA_NoDeadStrip);
}
}
}
}
+void AsmPrinter::EmitModuleIdents(Module &M) {
+ if (!MAI->hasIdentDirective())
+ return;
+
+ if (const NamedMDNode *NMD = M.getNamedMetadata("llvm.ident")) {
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+ const MDNode *N = NMD->getOperand(i);
+ assert(N->getNumOperands() == 1 &&
+ "llvm.ident metadata entry can have only one operand");
+ const MDString *S = cast<MDString>(N->getOperand(0));
+ OutStreamer.EmitIdent(S->getString());
+ }
+ }
+}
+
//===--------------------------------------------------------------------===//
// Emission and print routines
//
OutContext);
if (!MAI->hasSetDirective())
- OutStreamer.EmitValue(Diff, 4);
+ OutStreamer.EmitValue(Diff, Size);
else {
// Otherwise, emit with .set (aka assignment).
MCSymbol *SetLabel = GetTempSymbol("set", SetCounter++);
OutStreamer.EmitAssignment(SetLabel, Diff);
- OutStreamer.EmitSymbolValue(SetLabel, 4);
+ OutStreamer.EmitSymbolValue(SetLabel, Size);
}
}
return MCConstantExpr::Create(CI->getZExtValue(), Ctx);
if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
- return MCSymbolRefExpr::Create(AP.Mang->getSymbol(GV), Ctx);
+ return MCSymbolRefExpr::Create(AP.getSymbol(GV), Ctx);
if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV))
return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx);
case Instruction::GetElementPtr: {
const DataLayout &DL = *AP.TM.getDataLayout();
// Generate a symbolic expression for the byte address
- APInt OffsetAI(DL.getPointerSizeInBits(), 0);
+ APInt OffsetAI(DL.getPointerTypeSizeInBits(CE->getType()), 0);
cast<GEPOperator>(CE)->accumulateConstantOffset(DL, OffsetAI);
const MCExpr *Base = lowerConstant(CE->getOperand(0), AP);
// 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, DL.getIntPtrType(CV->getContext()),
+ Op = ConstantExpr::getIntegerCast(Op, DL.getIntPtrType(CV->getType()),
false/*ZExt*/);
return lowerConstant(Op, AP);
}
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