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An option to selectively enable part of ARM EHABI support.
This change adds an new option --arm-enable-ehabi-descriptors that enables emitting unwinding descriptors. This provides a mode with a working backtrace() without the (currently broken) exception support. llvm-svn: 148800
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@ -29,6 +29,7 @@
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/ADT/SmallString.h"
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@ -36,6 +37,12 @@
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#include "llvm/ADT/Twine.h"
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using namespace llvm;
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cl::opt<bool>
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EnableARMEHABIDescriptors("arm-enable-ehabi-descriptors", cl::Hidden,
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cl::desc("Generate ARM EHABI tables with unwinding descriptors"),
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cl::init(false));
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ARMException::ARMException(AsmPrinter *A)
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: DwarfException(A),
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shouldEmitTable(false), shouldEmitMoves(false), shouldEmitTableModule(false)
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@ -72,13 +79,15 @@ void ARMException::EndFunction() {
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Asm->OutStreamer.EmitPersonality(PerSym);
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}
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// Map all labels and get rid of any dead landing pads.
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MMI->TidyLandingPads();
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if (EnableARMEHABIDescriptors) {
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// Map all labels and get rid of any dead landing pads.
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MMI->TidyLandingPads();
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Asm->OutStreamer.EmitHandlerData();
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Asm->OutStreamer.EmitHandlerData();
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// Emit actual exception table
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EmitExceptionTable();
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// Emit actual exception table
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EmitExceptionTable();
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}
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}
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Asm->OutStreamer.EmitFnEnd();
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@ -2,6 +2,7 @@
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; unfamiliar instructions.
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; RUN: llc < %s -mtriple=thumbv7 -arm-enable-ehabi -disable-fp-elim
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; RUN: llc < %s -mtriple=thumbv7 -arm-enable-ehabi
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; RUN: llc < %s -mtriple=thumbv7 -arm-enable-ehabi -arm-enable-ehabi-descriptors
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define void @_Z1fv() nounwind {
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entry:
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