[llvm-commits] [llvm] r170279 - in /llvm/trunk: include/llvm/MC/ lib/CodeGen/AsmPrinter/ lib/MC/ lib/Target/Mips/MCTargetDesc/ test/CodeGen/Mips/ tools/lto/
Reed Kotler
rkotler at mips.com
Sat Dec 15 21:52:39 PST 2012
On 12/15/2012 09:04 PM, NAKAMURA Takumi wrote:
> AFAIU, it would be specific on asmstreamer for mips16 as. I didn't
> understand why you made each EmitDebugLabel() defined in each
> subclass. Would it be sufficient to define default action of
> EmitDebugLabel() in MCStreamer as alias of EmitLabel()?
I did this patch a month and a half ago now and I don't remember exactly
why I organized the patch exactly as I did.
If you can see a way to simplify it, please make the change. I have a
test case so if you
regress it, you will know on the next "make check" most likely. I was
uncomfortable touching
all those subclasses but at the time I did not see a way around that.
Maybe I was just not wearing
my thinking cap that day.
I had it out for review this whole period of time and nobody complained
about the structure so i didn't give it any more thought.
Reed
> ...Takumi
>
> 2012/12/16 Reed Kotler <rkotler at mips.com>:
>> Author: rkotler
>> Date: Sat Dec 15 22:00:45 2012
>> New Revision: 170279
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=170279&view=rev
>> Log:
>> This patch is needed to make c++ exceptions work for mips16.
>>
>> Mips16 is really a processor decoding mode (ala thumb 1) and in the same
>> program, mips16 and mips32 functions can exist and can call each other.
>>
>> If a jal type instruction encounters an address with the lower bit set, then
>> the processor switches to mips16 mode (if it is not already in it). If the
>> lower bit is not set, then it switches to mips32 mode.
>>
>> The linker knows which functions are mips16 and which are mips32.
>> When relocation is performed on code labels, this lower order bit is
>> set if the code label is a mips16 code label.
>>
>> In general this works just fine, however when creating exception handling
>> tables and dwarf, there are cases where you don't want this lower order
>> bit added in.
>>
>> This has been traditionally distinguished in gas assembly source by using a
>> different syntax for the label.
>>
>> lab1: ; this will cause the lower order bit to be added
>> lab2=. ; this will not cause the lower order bit to be added
>>
>> In some cases, it does not matter because in dwarf and debug tables
>> the difference of two labels is used and in that case the lower order
>> bits subtract each other out.
>>
>> To fix this, I have added to mcstreamer the notion of a debuglabel.
>> The default is for label and debug label to be the same. So calling
>> EmitLabel and EmitDebugLabel produce the same result.
>>
>> For various reasons, there is only one set of labels that needs to be
>> modified for the mips exceptions to work. These are the "$eh_func_beginXXX"
>> labels.
>>
>> Mips overrides the debug label suffix from ":" to "=." .
>>
>> This initial patch fixes exceptions. More changes most likely
>> will be needed to DwarfCFException to make all of this work
>> for actual debugging. These changes will be to emit debug labels in some
>> places where a simple label is emitted now.
>>
>> Some historical discussion on this from gcc can be found at:
>> http://gcc.gnu.org/ml/gcc-patches/2008-08/msg00623.html
>> http://gcc.gnu.org/ml/gcc-patches/2008-11/msg01273.html
>>
>>
>> Added:
>> llvm/trunk/test/CodeGen/Mips/mips16ex.ll
>> Modified:
>> llvm/trunk/include/llvm/MC/MCAsmInfo.h
>> llvm/trunk/include/llvm/MC/MCELFStreamer.h
>> llvm/trunk/include/llvm/MC/MCObjectStreamer.h
>> llvm/trunk/include/llvm/MC/MCStreamer.h
>> llvm/trunk/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp
>> llvm/trunk/lib/MC/MCAsmInfo.cpp
>> llvm/trunk/lib/MC/MCAsmStreamer.cpp
>> llvm/trunk/lib/MC/MCELFStreamer.cpp
>> llvm/trunk/lib/MC/MCMachOStreamer.cpp
>> llvm/trunk/lib/MC/MCNullStreamer.cpp
>> llvm/trunk/lib/MC/MCObjectStreamer.cpp
>> llvm/trunk/lib/MC/MCPureStreamer.cpp
>> llvm/trunk/lib/MC/MCStreamer.cpp
>> llvm/trunk/lib/MC/WinCOFFStreamer.cpp
>> llvm/trunk/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp
>> llvm/trunk/tools/lto/LTOModule.cpp
>>
>> Modified: llvm/trunk/include/llvm/MC/MCAsmInfo.h
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCAsmInfo.h?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/include/llvm/MC/MCAsmInfo.h (original)
>> +++ llvm/trunk/include/llvm/MC/MCAsmInfo.h Sat Dec 15 22:00:45 2012
>> @@ -102,6 +102,9 @@
>> /// LabelSuffix - This is appended to emitted labels.
>> const char *LabelSuffix; // Defaults to ":"
>>
>> + /// LabelSuffix - This is appended to emitted labels.
>> + const char *DebugLabelSuffix; // Defaults to ":"
>> +
>> /// GlobalPrefix - If this is set to a non-empty string, it is prepended
>> /// onto all global symbols. This is often used for "_" or ".".
>> const char *GlobalPrefix; // Defaults to ""
>> @@ -426,6 +429,11 @@
>> const char *getLabelSuffix() const {
>> return LabelSuffix;
>> }
>> +
>> + const char *getDebugLabelSuffix() const {
>> + return DebugLabelSuffix;
>> + }
>> +
>> const char *getGlobalPrefix() const {
>> return GlobalPrefix;
>> }
>>
>> Modified: llvm/trunk/include/llvm/MC/MCELFStreamer.h
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCELFStreamer.h?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/include/llvm/MC/MCELFStreamer.h (original)
>> +++ llvm/trunk/include/llvm/MC/MCELFStreamer.h Sat Dec 15 22:00:45 2012
>> @@ -47,6 +47,7 @@
>> virtual void InitSections();
>> virtual void ChangeSection(const MCSection *Section);
>> virtual void EmitLabel(MCSymbol *Symbol);
>> + virtual void EmitDebugLabel(MCSymbol *Symbol);
>> virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
>> virtual void EmitThumbFunc(MCSymbol *Func);
>> virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
>>
>> Modified: llvm/trunk/include/llvm/MC/MCObjectStreamer.h
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCObjectStreamer.h?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/include/llvm/MC/MCObjectStreamer.h (original)
>> +++ llvm/trunk/include/llvm/MC/MCObjectStreamer.h Sat Dec 15 22:00:45 2012
>> @@ -69,6 +69,7 @@
>> /// @{
>>
>> virtual void EmitLabel(MCSymbol *Symbol);
>> + virtual void EmitDebugLabel(MCSymbol *Symbol);
>> virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
>> virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
>> unsigned AddrSpace);
>>
>> Modified: llvm/trunk/include/llvm/MC/MCStreamer.h
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCStreamer.h?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/include/llvm/MC/MCStreamer.h (original)
>> +++ llvm/trunk/include/llvm/MC/MCStreamer.h Sat Dec 15 22:00:45 2012
>> @@ -244,6 +244,8 @@
>> /// used in an assignment.
>> virtual void EmitLabel(MCSymbol *Symbol);
>>
>> + virtual void EmitDebugLabel(MCSymbol *Symbol);
>> +
>> virtual void EmitEHSymAttributes(const MCSymbol *Symbol,
>> MCSymbol *EHSymbol);
>>
>>
>> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp (original)
>> +++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp Sat Dec 15 22:00:45 2012
>> @@ -122,8 +122,9 @@
>> const MCSymbol *Sym = TLOF.getCFIPersonalitySymbol(Per, Asm->Mang, MMI);
>> Asm->OutStreamer.EmitCFIPersonality(Sym, PerEncoding);
>>
>> - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
>> - Asm->getFunctionNumber()));
>> + Asm->OutStreamer.EmitDebugLabel
>> + (Asm->GetTempSymbol("eh_func_begin",
>> + Asm->getFunctionNumber()));
>>
>> // Provide LSDA information.
>> if (!shouldEmitLSDA)
>>
>> Modified: llvm/trunk/lib/MC/MCAsmInfo.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCAsmInfo.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/MCAsmInfo.cpp (original)
>> +++ llvm/trunk/lib/MC/MCAsmInfo.cpp Sat Dec 15 22:00:45 2012
>> @@ -37,6 +37,7 @@
>> CommentColumn = 40;
>> CommentString = "#";
>> LabelSuffix = ":";
>> + DebugLabelSuffix = ":";
>> GlobalPrefix = "";
>> PrivateGlobalPrefix = ".";
>> LinkerPrivateGlobalPrefix = "";
>>
>> Modified: llvm/trunk/lib/MC/MCAsmStreamer.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCAsmStreamer.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/MCAsmStreamer.cpp (original)
>> +++ llvm/trunk/lib/MC/MCAsmStreamer.cpp Sat Dec 15 22:00:45 2012
>> @@ -135,6 +135,8 @@
>> }
>>
>> virtual void EmitLabel(MCSymbol *Symbol);
>> + virtual void EmitDebugLabel(MCSymbol *Symbol);
>> +
>> virtual void EmitEHSymAttributes(const MCSymbol *Symbol,
>> MCSymbol *EHSymbol);
>> virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
>> @@ -345,6 +347,14 @@
>> EmitEOL();
>> }
>>
>> +void MCAsmStreamer::EmitDebugLabel(MCSymbol *Symbol) {
>> + assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
>> + MCStreamer::EmitDebugLabel(Symbol);
>> +
>> + OS << *Symbol << MAI.getDebugLabelSuffix();
>> + EmitEOL();
>> +}
>> +
>> void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
>> switch (Flag) {
>> case MCAF_SyntaxUnified: OS << "\t.syntax unified"; break;
>>
>> Modified: llvm/trunk/lib/MC/MCELFStreamer.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCELFStreamer.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/MCELFStreamer.cpp (original)
>> +++ llvm/trunk/lib/MC/MCELFStreamer.cpp Sat Dec 15 22:00:45 2012
>> @@ -86,6 +86,10 @@
>> MCELF::SetType(SD, ELF::STT_TLS);
>> }
>>
>> +void MCELFStreamer::EmitDebugLabel(MCSymbol *Symbol) {
>> + EmitLabel(Symbol);
>> +}
>> +
>> void MCELFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
>> switch (Flag) {
>> case MCAF_SyntaxUnified: return; // no-op here.
>>
>> Modified: llvm/trunk/lib/MC/MCMachOStreamer.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCMachOStreamer.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/MCMachOStreamer.cpp (original)
>> +++ llvm/trunk/lib/MC/MCMachOStreamer.cpp Sat Dec 15 22:00:45 2012
>> @@ -43,6 +43,7 @@
>>
>> virtual void InitSections();
>> virtual void EmitLabel(MCSymbol *Symbol);
>> + virtual void EmitDebugLabel(MCSymbol *Symbol);
>> virtual void EmitEHSymAttributes(const MCSymbol *Symbol,
>> MCSymbol *EHSymbol);
>> virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
>> @@ -130,6 +131,9 @@
>> SD.setFlags(SD.getFlags() & ~SF_ReferenceTypeMask);
>> }
>>
>> +void MCMachOStreamer::EmitDebugLabel(MCSymbol *Symbol) {
>> + EmitLabel(Symbol);
>> +}
>> void MCMachOStreamer::EmitDataRegion(DataRegionData::KindTy Kind) {
>> if (!getAssembler().getBackend().hasDataInCodeSupport())
>> return;
>>
>> Modified: llvm/trunk/lib/MC/MCNullStreamer.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCNullStreamer.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/MCNullStreamer.cpp (original)
>> +++ llvm/trunk/lib/MC/MCNullStreamer.cpp Sat Dec 15 22:00:45 2012
>> @@ -35,7 +35,9 @@
>> assert(getCurrentSection() && "Cannot emit before setting section!");
>> Symbol->setSection(*getCurrentSection());
>> }
>> -
>> + virtual void EmitDebugLabel(MCSymbol *Symbol) {
>> + EmitLabel(Symbol);
>> + }
>> virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {}
>> virtual void EmitThumbFunc(MCSymbol *Func) {}
>>
>>
>> Modified: llvm/trunk/lib/MC/MCObjectStreamer.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCObjectStreamer.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/MCObjectStreamer.cpp (original)
>> +++ llvm/trunk/lib/MC/MCObjectStreamer.cpp Sat Dec 15 22:00:45 2012
>> @@ -134,6 +134,10 @@
>> SD.setOffset(F->getContents().size());
>> }
>>
>> +void MCObjectStreamer::EmitDebugLabel(MCSymbol *Symbol) {
>> + EmitLabel(Symbol);
>> +}
>> +
>> void MCObjectStreamer::EmitULEB128Value(const MCExpr *Value) {
>> int64_t IntValue;
>> if (Value->EvaluateAsAbsolute(IntValue, getAssembler())) {
>>
>> Modified: llvm/trunk/lib/MC/MCPureStreamer.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCPureStreamer.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/MCPureStreamer.cpp (original)
>> +++ llvm/trunk/lib/MC/MCPureStreamer.cpp Sat Dec 15 22:00:45 2012
>> @@ -37,6 +37,7 @@
>>
>> virtual void InitSections();
>> virtual void EmitLabel(MCSymbol *Symbol);
>> + virtual void EmitDebugLabel(MCSymbol *Symbol);
>> virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
>> uint64_t Size = 0, unsigned ByteAlignment = 0);
>> virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
>> @@ -134,6 +135,7 @@
>> SD.setOffset(F->getContents().size());
>> }
>>
>> +
>> void MCPureStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
>> uint64_t Size, unsigned ByteAlignment) {
>> report_fatal_error("not yet implemented in pure streamer");
>>
>> Modified: llvm/trunk/lib/MC/MCStreamer.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCStreamer.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/MCStreamer.cpp (original)
>> +++ llvm/trunk/lib/MC/MCStreamer.cpp Sat Dec 15 22:00:45 2012
>> @@ -195,6 +195,13 @@
>> LastSymbol = Symbol;
>> }
>>
>> +void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
>> + assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
>> + assert(getCurrentSection() && "Cannot emit before setting section!");
>> + Symbol->setSection(*getCurrentSection());
>> + LastSymbol = Symbol;
>> +}
>> +
>> void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
>> EnsureValidFrame();
>> MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
>>
>> Modified: llvm/trunk/lib/MC/WinCOFFStreamer.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/WinCOFFStreamer.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/WinCOFFStreamer.cpp (original)
>> +++ llvm/trunk/lib/MC/WinCOFFStreamer.cpp Sat Dec 15 22:00:45 2012
>> @@ -51,6 +51,7 @@
>>
>> virtual void InitSections();
>> virtual void EmitLabel(MCSymbol *Symbol);
>> + virtual void EmitDebugLabel(MCSymbol *Symbol);
>> virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
>> virtual void EmitThumbFunc(MCSymbol *Func);
>> virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
>> @@ -176,6 +177,9 @@
>> MCObjectStreamer::EmitLabel(Symbol);
>> }
>>
>> +void WinCOFFStreamer::EmitDebugLabel(MCSymbol *Symbol) {
>> + EmitLabel(Symbol);
>> +}
>> void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
>> llvm_unreachable("not implemented");
>> }
>>
>> Modified: llvm/trunk/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp (original)
>> +++ llvm/trunk/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp Sat Dec 15 22:00:45 2012
>> @@ -34,7 +34,7 @@
>> GPRel32Directive = "\t.gpword\t";
>> GPRel64Directive = "\t.gpdword\t";
>> WeakRefDirective = "\t.weak\t";
>> -
>> + DebugLabelSuffix = "=.";
>> SupportsDebugInformation = true;
>> ExceptionsType = ExceptionHandling::DwarfCFI;
>> HasLEB128 = true;
>>
>> Added: llvm/trunk/test/CodeGen/Mips/mips16ex.ll
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/mips16ex.ll?rev=170279&view=auto
>> ==============================================================================
>> --- llvm/trunk/test/CodeGen/Mips/mips16ex.ll (added)
>> +++ llvm/trunk/test/CodeGen/Mips/mips16ex.ll Sat Dec 15 22:00:45 2012
>> @@ -0,0 +1,87 @@
>> +; RUN: llc -march=mipsel -mcpu=mips16 -relocation-model=pic -O3 < %s | FileCheck %s -check-prefix=16
>> +
>> +;16: $eh_func_begin0=.
>> + at .str = private unnamed_addr constant [7 x i8] c"hello\0A\00", align 1
>> + at _ZTIi = external constant i8*
>> + at .str1 = private unnamed_addr constant [15 x i8] c"exception %i \0A\00", align 1
>> +
>> +define i32 @main() {
>> +entry:
>> + %retval = alloca i32, align 4
>> + %exn.slot = alloca i8*
>> + %ehselector.slot = alloca i32
>> + %e = alloca i32, align 4
>> + store i32 0, i32* %retval
>> + %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([7 x i8]* @.str, i32 0, i32 0))
>> + %exception = call i8* @__cxa_allocate_exception(i32 4) nounwind
>> + %0 = bitcast i8* %exception to i32*
>> + store i32 20, i32* %0
>> + invoke void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null) noreturn
>> + to label %unreachable unwind label %lpad
>> +
>> +lpad: ; preds = %entry
>> + %1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
>> + catch i8* bitcast (i8** @_ZTIi to i8*)
>> + %2 = extractvalue { i8*, i32 } %1, 0
>> + store i8* %2, i8** %exn.slot
>> + %3 = extractvalue { i8*, i32 } %1, 1
>> + store i32 %3, i32* %ehselector.slot
>> + br label %catch.dispatch
>> +
>> +catch.dispatch: ; preds = %lpad
>> + %sel = load i32* %ehselector.slot
>> + %4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) nounwind
>> + %matches = icmp eq i32 %sel, %4
>> + br i1 %matches, label %catch, label %eh.resume
>> +
>> +catch: ; preds = %catch.dispatch
>> + %exn = load i8** %exn.slot
>> + %5 = call i8* @__cxa_begin_catch(i8* %exn) nounwind
>> + %6 = bitcast i8* %5 to i32*
>> + %exn.scalar = load i32* %6
>> + store i32 %exn.scalar, i32* %e, align 4
>> + %7 = load i32* %e, align 4
>> + %call2 = invoke i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([15 x i8]* @.str1, i32 0, i32 0), i32 %7)
>> + to label %invoke.cont unwind label %lpad1
>> +
>> +invoke.cont: ; preds = %catch
>> + call void @__cxa_end_catch() nounwind
>> + br label %try.cont
>> +
>> +try.cont: ; preds = %invoke.cont
>> + ret i32 0
>> +
>> +lpad1: ; preds = %catch
>> + %8 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
>> + cleanup
>> + %9 = extractvalue { i8*, i32 } %8, 0
>> + store i8* %9, i8** %exn.slot
>> + %10 = extractvalue { i8*, i32 } %8, 1
>> + store i32 %10, i32* %ehselector.slot
>> + call void @__cxa_end_catch() nounwind
>> + br label %eh.resume
>> +
>> +eh.resume: ; preds = %lpad1, %catch.dispatch
>> + %exn3 = load i8** %exn.slot
>> + %sel4 = load i32* %ehselector.slot
>> + %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn3, 0
>> + %lpad.val5 = insertvalue { i8*, i32 } %lpad.val, i32 %sel4, 1
>> + resume { i8*, i32 } %lpad.val5
>> +
>> +unreachable: ; preds = %entry
>> + unreachable
>> +}
>> +
>> +declare i32 @printf(i8*, ...)
>> +
>> +declare i8* @__cxa_allocate_exception(i32)
>> +
>> +declare i32 @__gxx_personality_v0(...)
>> +
>> +declare void @__cxa_throw(i8*, i8*, i8*)
>> +
>> +declare i32 @llvm.eh.typeid.for(i8*) nounwind readnone
>> +
>> +declare i8* @__cxa_begin_catch(i8*)
>> +
>> +declare void @__cxa_end_catch()
>>
>> Modified: llvm/trunk/tools/lto/LTOModule.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/lto/LTOModule.cpp?rev=170279&r1=170278&r2=170279&view=diff
>> ==============================================================================
>> --- llvm/trunk/tools/lto/LTOModule.cpp (original)
>> +++ llvm/trunk/tools/lto/LTOModule.cpp Sat Dec 15 22:00:45 2012
>> @@ -745,6 +745,9 @@
>> Symbol->setSection(*getCurrentSection());
>> markDefined(*Symbol);
>> }
>> + virtual void EmitDebugLabel(MCSymbol *Symbol) {
>> + EmitLabel(Symbol);
>> + }
>> virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
>> // FIXME: should we handle aliases?
>> markDefined(*Symbol);
>>
>>
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