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The lower invoke pass needs to have unreachable code elimination run after it

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because it could create such things. This fixes a MingW buildbot test failure.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110279 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2010-08-04 23:36:02 +00:00
parent f66514ad3a
commit af33b7b4a7
2 changed files with 43 additions and 2 deletions
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6
lib/CodeGen/LLVMTargetMachine.cpp
View File

@ -288,13 +288,15 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
// pad is shared by multiple invokes and is also a target of a normal // pad is shared by multiple invokes and is also a target of a normal
// edge from elsewhere. // edge from elsewhere.
PM.add(createSjLjEHPass(getTargetLowering())); PM.add(createSjLjEHPass(getTargetLowering()));
PM.add(createDwarfEHPass(this, OptLevel==CodeGenOpt::None)); // FALLTHROUGH
break;
case ExceptionHandling::Dwarf: case ExceptionHandling::Dwarf:
PM.add(createDwarfEHPass(this, OptLevel==CodeGenOpt::None)); PM.add(createDwarfEHPass(this, OptLevel==CodeGenOpt::None));
break; break;
case ExceptionHandling::None: case ExceptionHandling::None:
PM.add(createLowerInvokePass(getTargetLowering())); PM.add(createLowerInvokePass(getTargetLowering()));
// The lower invoke pass may create unreachable code. Remove it.
PM.add(createUnreachableBlockEliminationPass());
break; break;
} }

39
test/CodeGen/X86/2010-08-04-MingWCrash.ll Normal file
View File

@ -0,0 +1,39 @@
; RUN: llc < %s -mtriple=i386-pc-mingw32
define void @func() nounwind {
invoke.cont:
%call = tail call i8* @malloc()
%a = invoke i32 @bar()
to label %bb1 unwind label %lpad
bb1:
ret void
lpad:
%exn = tail call i8* @llvm.eh.exception() nounwind
%eh.selector = tail call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %exn, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i32 1, i8* null) nounwind
%ehspec.fails = icmp slt i32 %eh.selector, 0
br i1 %ehspec.fails, label %ehspec.unexpected, label %cleanup
cleanup:
tail call void @_Unwind_Resume_or_Rethrow(i8* %exn) noreturn nounwind
unreachable
ehspec.unexpected:
tail call void @__cxa_call_unexpected(i8* %exn) noreturn nounwind
unreachable
}
declare noalias i8* @malloc()
declare i8* @llvm.eh.exception() nounwind readonly
declare i32 @__gxx_personality_v0(...)
declare i32 @llvm.eh.selector(i8*, i8*, ...) nounwind
declare void @_Unwind_Resume_or_Rethrow(i8*)
declare void @__cxa_call_unexpected(i8*)
declare i32 @bar()