#include "llvm/CodeGen/AsmPrinter.h"
#include "DwarfDebug.h"
#include "DwarfException.h"
+#include "WinCodeViewLineTables.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/DebugInfo.h"
#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
using namespace llvm;
static const char *const DWARFGroupName = "DWARF Emission";
-static const char *const DbgTimerName = "DWARF Debug Writer";
+static const char *const DbgTimerName = "Debug Info Emission";
static const char *const EHTimerName = "DWARF Exception Writer";
+static const char *const CodeViewLineTablesGroupName = "CodeView Line Tables";
STATISTIC(EmittedInsts, "Number of machine instrs printed");
const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
.Initialize(OutContext, TM);
- OutStreamer.InitSections(false);
+ OutStreamer.InitSections();
Mang = new Mangler(TM.getDataLayout());
+ // Emit the version-min deplyment target directive if needed.
+ //
+ // FIXME: If we end up with a collection of these sorts of Darwin-specific
+ // or ELF-specific things, it may make sense to have a platform helper class
+ // that will work with the target helper class. For now keep it here, as the
+ // alternative is duplicated code in each of the target asm printers that
+ // use the directive, where it would need the same conditionalization
+ // anyway.
+ Triple TT(getTargetTriple());
+ if (TT.isOSDarwin()) {
+ unsigned Major, Minor, Update;
+ TT.getOSVersion(Major, Minor, Update);
+ // If there is a version specified, Major will be non-zero.
+ if (Major)
+ OutStreamer.EmitVersionMin((TT.isMacOSX() ?
+ MCVM_OSXVersionMin : MCVM_IOSVersionMin),
+ Major, Minor, Update);
+ }
+
// Allow the target to emit any magic that it wants at the start of the file.
EmitStartOfAsmFile(M);
}
if (MAI->doesSupportDebugInformation()) {
- DD = new DwarfDebug(this, &M);
- Handlers.push_back(HandlerInfo(DD, DbgTimerName, DWARFGroupName));
+ if (Triple(TM.getTargetTriple()).isKnownWindowsMSVCEnvironment()) {
+ Handlers.push_back(HandlerInfo(new WinCodeViewLineTables(this),
+ DbgTimerName,
+ CodeViewLineTablesGroupName));
+ } else {
+ DD = new DwarfDebug(this, &M);
+ Handlers.push_back(HandlerInfo(DD, DbgTimerName, DWARFGroupName));
+ }
}
DwarfException *DE = 0;
return false;
}
+static bool canBeHidden(const GlobalValue *GV, const MCAsmInfo &MAI) {
+ GlobalValue::LinkageTypes Linkage = GV->getLinkage();
+ if (Linkage != GlobalValue::LinkOnceODRLinkage)
+ return false;
+
+ if (!MAI.hasWeakDefCanBeHiddenDirective())
+ return false;
+
+ if (GV->hasUnnamedAddr())
+ return true;
+
+ // This is only used for MachO, so right now it doesn't really matter how
+ // we handle alias. Revisit this once the MachO linker implements aliases.
+ if (isa<GlobalAlias>(GV))
+ return false;
+
+ // If it is a non constant variable, it needs to be uniqued across shared
+ // objects.
+ if (const GlobalVariable *Var = dyn_cast<GlobalVariable>(GV)) {
+ if (!Var->isConstant())
+ return false;
+ }
+
+ GlobalStatus GS;
+ if (!GlobalStatus::analyzeGlobal(GV, GS) && !GS.IsCompared)
+ return true;
+
+ return false;
+}
+
void AsmPrinter::EmitLinkage(const GlobalValue *GV, MCSymbol *GVSym) const {
GlobalValue::LinkageTypes Linkage = GV->getLinkage();
switch (Linkage) {
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
- case GlobalValue::LinkerPrivateWeakLinkage:
if (MAI->hasWeakDefDirective()) {
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
- bool CanBeHidden = false;
-
- if (Linkage == GlobalValue::LinkOnceODRLinkage &&
- MAI->hasWeakDefCanBeHiddenDirective()) {
- if (GV->hasUnnamedAddr()) {
- CanBeHidden = true;
- } else {
- GlobalStatus GS;
- if (!GlobalStatus::analyzeGlobal(GV, GS) && !GS.IsCompared)
- CanBeHidden = true;
- }
- }
-
- if (!CanBeHidden)
+ if (!canBeHidden(GV, *MAI))
// .weak_definition _foo
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
else
return;
case GlobalValue::PrivateLinkage:
case GlobalValue::InternalLinkage:
- case GlobalValue::LinkerPrivateLinkage:
return;
case GlobalValue::AvailableExternallyLinkage:
llvm_unreachable("Should never emit this");
llvm_unreachable("Unknown linkage type!");
}
+void AsmPrinter::getNameWithPrefix(SmallVectorImpl<char> &Name,
+ const GlobalValue *GV) const {
+ TM.getNameWithPrefix(Name, GV, *Mang);
+}
+
MCSymbol *AsmPrinter::getSymbol(const GlobalValue *GV) const {
- return getObjFileLowering().getSymbol(*Mang, GV);
+ return TM.getSymbol(GV, *Mang);
}
/// EmitGlobalVariable - Emit the specified global variable to the .s file.
// Handle local BSS symbols.
if (MAI->hasMachoZeroFillDirective()) {
const MCSection *TheSection =
- getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM);
+ getObjFileLowering().SectionForGlobal(GV, GVKind, *Mang, TM);
// .zerofill __DATA, __bss, _foo, 400, 5
OutStreamer.EmitZerofill(TheSection, GVSym, Size, Align);
return;
}
const MCSection *TheSection =
- getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM);
+ getObjFileLowering().SectionForGlobal(GV, GVKind, *Mang, TM);
// Handle the zerofill directive on darwin, which is a special form of BSS
// emission.
// Print the 'header' of function.
const Function *F = MF->getFunction();
- OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
+ OutStreamer.SwitchSection(
+ getObjFileLowering().SectionForGlobal(F, *Mang, TM));
EmitVisibility(CurrentFnSym, F->getVisibility());
EmitLinkage(F, CurrentFnSym);
MF->getFunction()->needsUnwindTableEntry();
}
-void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
- const MCSymbol *Label = MI.getOperand(0).getMCSymbol();
-
- if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI)
+void AsmPrinter::emitCFIInstruction(const MachineInstr &MI) {
+ ExceptionHandling::ExceptionsType ExceptionHandlingType =
+ MAI->getExceptionHandlingType();
+ if (ExceptionHandlingType != ExceptionHandling::DwarfCFI &&
+ ExceptionHandlingType != ExceptionHandling::ARM)
return;
if (needsCFIMoves() == CFI_M_None)
const MachineModuleInfo &MMI = MF->getMMI();
const std::vector<MCCFIInstruction> &Instrs = MMI.getFrameInstructions();
- bool FoundOne = false;
- (void)FoundOne;
- for (std::vector<MCCFIInstruction>::const_iterator I = Instrs.begin(),
- E = Instrs.end(); I != E; ++I) {
- if (I->getLabel() == Label) {
- emitCFIInstruction(*I);
- FoundOne = true;
- }
- }
- assert(FoundOne);
+ unsigned CFIIndex = MI.getOperand(0).getCFIIndex();
+ const MCCFIInstruction &CFI = Instrs[CFIIndex];
+ emitCFIInstruction(CFI);
}
/// EmitFunctionBody - This method emits the body and trailer for a
LastMI = II;
// Print the assembly for the instruction.
- if (!II->isLabel() && !II->isImplicitDef() && !II->isKill() &&
+ if (!II->isPosition() && !II->isImplicitDef() && !II->isKill() &&
!II->isDebugValue()) {
HasAnyRealCode = true;
++EmittedInsts;
emitComments(*II, OutStreamer.GetCommentOS());
switch (II->getOpcode()) {
- case TargetOpcode::PROLOG_LABEL:
- emitPrologLabel(*II);
+ case TargetOpcode::CFI_INSTRUCTION:
+ emitCFIInstruction(*II);
break;
case TargetOpcode::EH_LABEL:
if (isVerbose()) emitKill(II, *this);
break;
default:
- if (!TM.hasMCUseLoc())
- MCLineEntry::Make(&OutStreamer, getCurrentSection());
-
EmitInstruction(II);
break;
}
// 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();
+ bool RequiresNoop = LastMI && LastMI->isCFIInstruction();
// 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
OutStreamer.AddBlankLine();
}
-/// EmitDwarfRegOp - Emit dwarf register operation.
-void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc,
- bool Indirect) const {
- const TargetRegisterInfo *TRI = TM.getRegisterInfo();
- int Reg = TRI->getDwarfRegNum(MLoc.getReg(), false);
-
- for (MCSuperRegIterator SR(MLoc.getReg(), TRI); SR.isValid() && Reg < 0;
- ++SR) {
- Reg = TRI->getDwarfRegNum(*SR, false);
- // FIXME: Get the bit range this register uses of the superregister
- // so that we can produce a DW_OP_bit_piece
- }
-
- // FIXME: Handle cases like a super register being encoded as
- // DW_OP_reg 32 DW_OP_piece 4 DW_OP_reg 33
-
- // FIXME: We have no reasonable way of handling errors in here. The
- // caller might be in the middle of an dwarf expression. We should
- // probably assert that Reg >= 0 once debug info generation is more mature.
-
- if (MLoc.isIndirect() || Indirect) {
- 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(!MLoc.isIndirect() ? 0 : MLoc.getOffset());
- if (MLoc.isIndirect() && Indirect)
- EmitInt8(dwarf::DW_OP_deref);
- } 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);
- }
- }
-
- // FIXME: Produce a DW_OP_bit_piece if we used a superregister
-}
-
bool AsmPrinter::doFinalization(Module &M) {
// Emit global variables.
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
SmallVector<Module::ModuleFlagEntry, 8> ModuleFlags;
M.getModuleFlagsMetadata(ModuleFlags);
if (!ModuleFlags.empty())
- getObjFileLowering().emitModuleFlags(OutStreamer, ModuleFlags, Mang, TM);
+ getObjFileLowering().emitModuleFlags(OutStreamer, ModuleFlags, *Mang, TM);
// Make sure we wrote out everything we need.
OutStreamer.Flush();
MCSymbol *Name = getSymbol(I);
const GlobalValue *GV = I->getAliasedGlobal();
- if (GV->isDeclaration()) {
- report_fatal_error(Name->getName() +
- ": Target doesn't support aliases to declarations");
- }
-
+ assert(!GV->isDeclaration());
MCSymbol *Target = getSymbol(GV);
if (I->hasExternalLinkage() || !MAI->getWeakRefDirective())
// 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));
+ OutStreamer.SwitchSection(
+ getObjFileLowering().SectionForGlobal(F, *Mang, TM));
} else {
// Otherwise, drop it in the readonly section.
const MCSection *ReadOnlySection =
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))
+ if (GV)
OutStreamer.EmitSymbolAttribute(getSymbol(GV), MCSA_NoDeadStrip);
}
}
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 &&
+ 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());
if (getCurrentSection()->getKind().isText())
OutStreamer.EmitCodeAlignment(1 << NumBits);
else
- OutStreamer.EmitValueToAlignment(1 << NumBits, 0, 1, 0);
+ OutStreamer.EmitValueToAlignment(1 << NumBits);
}
//===----------------------------------------------------------------------===//
}
if (const MCExpr *RelocExpr =
- AP.getObjFileLowering().getExecutableRelativeSymbol(CE, AP.Mang))
+ AP.getObjFileLowering().getExecutableRelativeSymbol(CE, *AP.Mang,
+ AP.TM))
return RelocExpr;
switch (CE->getOpcode()) {
/// GetTempSymbol - Return the MCSymbol corresponding to the assembler
/// temporary label with the specified stem and unique ID.
-MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name, unsigned ID) const {
+MCSymbol *AsmPrinter::GetTempSymbol(Twine Name, unsigned ID) const {
const DataLayout *DL = TM.getDataLayout();
return OutContext.GetOrCreateSymbol(Twine(DL->getPrivateGlobalPrefix()) +
Name + Twine(ID));
/// GetTempSymbol - Return an assembler temporary label with the specified
/// stem.
-MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name) const {
+MCSymbol *AsmPrinter::GetTempSymbol(Twine Name) const {
const DataLayout *DL = TM.getDataLayout();
return OutContext.GetOrCreateSymbol(Twine(DL->getPrivateGlobalPrefix())+
Name);
MCSymbol *AsmPrinter::getSymbolWithGlobalValueBase(const GlobalValue *GV,
StringRef Suffix) const {
- return getObjFileLowering().getSymbolWithGlobalValueBase(*Mang, GV, Suffix);
+ return getObjFileLowering().getSymbolWithGlobalValueBase(GV, Suffix, *Mang,
+ TM);
}
/// GetExternalSymbolSymbol - Return the MCSymbol for the specified
// Print the main label for the block.
if (MBB->pred_empty() || isBlockOnlyReachableByFallthrough(MBB)) {
- if (isVerbose() && OutStreamer.hasRawTextSupport()) {
+ if (isVerbose()) {
// NOTE: Want this comment at start of line, don't emit with AddComment.
OutStreamer.emitRawComment(" BB#" + Twine(MBB->getNumber()) + ":", false);
}
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