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Add all the plumbing needed for MC to expand cfi to the old tables in

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the final assembly. It is the same technique used when targeting
assemblers that don't support .loc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130587 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2011-04-30 03:44:37 +00:00
parent a37bd1d02c
commit f1a5c7ec04
10 changed files with 69 additions and 9 deletions
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1
include/llvm/MC/MCStreamer.h
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@ -510,6 +510,7 @@ namespace llvm {
MCStreamer *createAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
bool isVerboseAsm,
bool useLoc,
bool useCFI,
MCInstPrinter *InstPrint = 0,
MCCodeEmitter *CE = 0,
TargetAsmBackend *TAB = 0,

7
include/llvm/Target/TargetMachine.h
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@ -108,6 +108,7 @@ protected: // Can only create subclasses.
unsigned MCNoExecStack : 1;
unsigned MCSaveTempLabels : 1;
unsigned MCUseLoc : 1;
unsigned MCUseCFI : 1;
public:
virtual ~TargetMachine();
@ -193,6 +194,12 @@ public:
/// setMCUseLoc - Set whether all we should use dwarf's .loc directive.
void setMCUseLoc(bool Value) { MCUseLoc = Value; }
/// hasMCUseCFI - Check whether we should use dwarf's .cfi_* directives.
bool hasMCUseCFI() const { return MCUseCFI; }
/// setMCUseCFI - Set whether all we should use dwarf's .cfi_* directives.
void setMCUseCFI(bool Value) { MCUseCFI = Value; }
/// getRelocationModel - Returns the code generation relocation model. The
/// choices are static, PIC, and dynamic-no-pic, and target default.
static Reloc::Model getRelocationModel();

6
include/llvm/Target/TargetRegistry.h
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@ -43,7 +43,7 @@ namespace llvm {
MCStreamer *createAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
bool isVerboseAsm,
bool useLoc,
bool useLoc, bool useCFI,
MCInstPrinter *InstPrint,
MCCodeEmitter *CE,
TargetAsmBackend *TAB,
@ -96,6 +96,7 @@ namespace llvm {
formatted_raw_ostream &OS,
bool isVerboseAsm,
bool useLoc,
bool useCFI,
MCInstPrinter *InstPrint,
MCCodeEmitter *CE,
TargetAsmBackend *TAB,
@ -329,12 +330,13 @@ namespace llvm {
formatted_raw_ostream &OS,
bool isVerboseAsm,
bool useLoc,
bool useCFI,
MCInstPrinter *InstPrint,
MCCodeEmitter *CE,
TargetAsmBackend *TAB,
bool ShowInst) const {
// AsmStreamerCtorFn is default to llvm::createAsmStreamer
return AsmStreamerCtorFn(Ctx, OS, isVerboseAsm, useLoc,
return AsmStreamerCtorFn(Ctx, OS, isVerboseAsm, useLoc, useCFI,
InstPrint, CE, TAB, ShowInst);
}

1
lib/CodeGen/LLVMTargetMachine.cpp
View File

@ -149,6 +149,7 @@ bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
MCStreamer *S = getTarget().createAsmStreamer(*Context, Out,
getVerboseAsm(),
hasMCUseLoc(),
hasMCUseCFI(),
InstPrinter,
MCE, TAB,
ShowMCInst);

48
lib/MC/MCAsmStreamer.cpp
View File

@ -45,20 +45,20 @@ class MCAsmStreamer : public MCStreamer {
unsigned IsVerboseAsm : 1;
unsigned ShowInst : 1;
unsigned UseLoc : 1;
unsigned UseCFI : 1;
bool needsSet(const MCExpr *Value);
public:
MCAsmStreamer(MCContext &Context, formatted_raw_ostream &os,
bool isVerboseAsm,
bool useLoc,
bool isVerboseAsm, bool useLoc, bool useCFI,
MCInstPrinter *printer, MCCodeEmitter *emitter,
TargetAsmBackend *asmbackend,
bool showInst)
: MCStreamer(Context), OS(os), MAI(Context.getAsmInfo()),
InstPrinter(printer), Emitter(emitter), AsmBackend(asmbackend),
CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm),
ShowInst(showInst), UseLoc(useLoc) {
ShowInst(showInst), UseLoc(useLoc), UseCFI(useCFI) {
if (InstPrinter && IsVerboseAsm)
InstPrinter->setCommentStream(CommentStream);
}
@ -740,6 +740,9 @@ void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
void MCAsmStreamer::EmitCFIStartProc() {
MCStreamer::EmitCFIStartProc();
if (!UseCFI)
return;
OS << "\t.cfi_startproc";
EmitEOL();
}
@ -747,6 +750,9 @@ void MCAsmStreamer::EmitCFIStartProc() {
void MCAsmStreamer::EmitCFIEndProc() {
MCStreamer::EmitCFIEndProc();
if (!UseCFI)
return;
OS << "\t.cfi_endproc";
EmitEOL();
}
@ -754,6 +760,9 @@ void MCAsmStreamer::EmitCFIEndProc() {
void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
MCStreamer::EmitCFIDefCfa(Register, Offset);
if (!UseCFI)
return;
OS << ".cfi_def_cfa " << Register << ", " << Offset;
EmitEOL();
}
@ -761,6 +770,9 @@ void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
void MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
MCStreamer::EmitCFIDefCfaOffset(Offset);
if (!UseCFI)
return;
OS << "\t.cfi_def_cfa_offset " << Offset;
EmitEOL();
}
@ -768,6 +780,9 @@ void MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
void MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) {
MCStreamer::EmitCFIDefCfaRegister(Register);
if (!UseCFI)
return;
OS << "\t.cfi_def_cfa_register " << Register;
EmitEOL();
}
@ -775,6 +790,9 @@ void MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) {
void MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
this->MCStreamer::EmitCFIOffset(Register, Offset);
if (!UseCFI)
return;
OS << "\t.cfi_offset " << Register << ", " << Offset;
EmitEOL();
}
@ -783,6 +801,9 @@ void MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym,
unsigned Encoding) {
MCStreamer::EmitCFIPersonality(Sym, Encoding);
if (!UseCFI)
return;
OS << "\t.cfi_personality " << Encoding << ", " << *Sym;
EmitEOL();
}
@ -790,6 +811,9 @@ void MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym,
void MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
MCStreamer::EmitCFILsda(Sym, Encoding);
if (!UseCFI)
return;
OS << "\t.cfi_lsda " << Encoding << ", " << *Sym;
EmitEOL();
}
@ -797,6 +821,9 @@ void MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
void MCAsmStreamer::EmitCFIRememberState() {
MCStreamer::EmitCFIRememberState();
if (!UseCFI)
return;
OS << "\t.cfi_remember_state";
EmitEOL();
}
@ -804,6 +831,9 @@ void MCAsmStreamer::EmitCFIRememberState() {
void MCAsmStreamer::EmitCFIRestoreState() {
MCStreamer::EmitCFIRestoreState();
if (!UseCFI)
return;
OS << "\t.cfi_restore_state";
EmitEOL();
}
@ -811,6 +841,9 @@ void MCAsmStreamer::EmitCFIRestoreState() {
void MCAsmStreamer::EmitCFISameValue(int64_t Register) {
MCStreamer::EmitCFISameValue(Register);
if (!UseCFI)
return;
OS << "\t.cfi_same_value " << Register;
EmitEOL();
}
@ -818,6 +851,9 @@ void MCAsmStreamer::EmitCFISameValue(int64_t Register) {
void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
MCStreamer::EmitCFIRelOffset(Register, Offset);
if (!UseCFI)
return;
OS << "\t.cfi_rel_offset " << Register << ", " << Offset;
EmitEOL();
}
@ -825,6 +861,9 @@ void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
void MCAsmStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
MCStreamer::EmitCFIAdjustCfaOffset(Adjustment);
if (!UseCFI)
return;
OS << "\t.cfi_adjust_cfa_offset " << Adjustment;
EmitEOL();
}
@ -1008,8 +1047,9 @@ void MCAsmStreamer::Finish() {
MCStreamer *llvm::createAsmStreamer(MCContext &Context,
formatted_raw_ostream &OS,
bool isVerboseAsm, bool useLoc,
bool useCFI,
MCInstPrinter *IP, MCCodeEmitter *CE,
TargetAsmBackend *TAB, bool ShowInst) {
return new MCAsmStreamer(Context, OS, isVerboseAsm, useLoc,
return new MCAsmStreamer(Context, OS, isVerboseAsm, useLoc, useCFI,
IP, CE, TAB, ShowInst);
}

2
lib/Target/PTX/PTXMCAsmStreamer.cpp
View File

@ -531,7 +531,7 @@ void PTXMCAsmStreamer::Finish() {}
namespace llvm {
MCStreamer *createPTXAsmStreamer(MCContext &Context,
formatted_raw_ostream &OS,
bool isVerboseAsm, bool useLoc,
bool isVerboseAsm, bool useLoc, bool useCFI,
MCInstPrinter *IP,
MCCodeEmitter *CE, TargetAsmBackend *TAB,
bool ShowInst) {

1
lib/Target/PTX/PTXTargetMachine.cpp
View File

@ -23,6 +23,7 @@ using namespace llvm;
namespace llvm {
MCStreamer *createPTXAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
bool isVerboseAsm, bool useLoc,
bool useCFI,
MCInstPrinter *InstPrint,
MCCodeEmitter *CE,
TargetAsmBackend *TAB,

3
lib/Target/TargetMachine.cpp
View File

@ -227,7 +227,8 @@ TargetMachine::TargetMachine(const Target &T)
MCRelaxAll(false),
MCNoExecStack(false),
MCSaveTempLabels(false),
MCUseLoc(true) {
MCUseLoc(true),
MCUseCFI(true) {
// Typically it will be subtargets that will adjust FloatABIType from Default
// to Soft or Hard.
if (UseSoftFloat)

6
tools/llc/llc.cpp
View File

@ -99,6 +99,9 @@ cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
cl::opt<bool> DisableDotLoc("disable-dot-loc", cl::Hidden,
cl::desc("Do not use .loc entries"));
cl::opt<bool> DisableCFI("disable-cfi", cl::Hidden,
cl::desc("Do not use .cfi_* directives"));
static cl::opt<bool>
DisableRedZone("disable-red-zone",
cl::desc("Do not emit code that uses the red zone."),
@ -279,6 +282,9 @@ int main(int argc, char **argv) {
if (DisableDotLoc)
Target.setMCUseLoc(false);
if (DisableCFI)
Target.setMCUseCFI(false);
// Disable .loc support for older OS X versions.
if (TheTriple.isMacOSX() &&
TheTriple.isMacOSXVersionLT(10, 6))

3
tools/llvm-mc/llvm-mc.cpp
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@ -356,7 +356,8 @@ static int AssembleInput(const char *ProgName) {
TAB = TheTarget->createAsmBackend(TripleName);
}
Str.reset(TheTarget->createAsmStreamer(Ctx, FOS, /*asmverbose*/true,
/*useLoc*/ true, IP, CE, TAB,
/*useLoc*/ true,
/*useCFI*/ true, IP, CE, TAB,
ShowInst));
} else if (FileType == OFT_Null) {
Str.reset(createNullStreamer(Ctx));