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PR4662: Fix a crash introduced by the recent LLVMContext changes.

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llvm-svn: 77716
This commit is contained in:
Eli Friedman 2009-07-31 19:36:47 +00:00
parent 481c23300a
commit 7bb0485237
2 changed files with 16 additions and 1 deletions
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3
lib/Transforms/Scalar/TailDuplication.cpp
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@ -360,7 +360,8 @@ void TailDup::eliminateUnconditionalBranch(BranchInst *Branch) {
Instruction *Inst = BI++; Instruction *Inst = BI++;
if (isInstructionTriviallyDead(Inst)) if (isInstructionTriviallyDead(Inst))
Inst->eraseFromParent(); Inst->eraseFromParent();
else if (Constant *C = ConstantFoldInstruction(Inst, BI->getContext())) { else if (Constant *C = ConstantFoldInstruction(Inst,
Inst->getContext())) {
Inst->replaceAllUsesWith(C); Inst->replaceAllUsesWith(C);
Inst->eraseFromParent(); Inst->eraseFromParent();
} }

14
test/Transforms/TailDup/2009-07-31-phicrash.ll Normal file
View File

@ -0,0 +1,14 @@
; RUN: llvm-as < %s | opt -tailduplicate -disable-output
; PR4662
define void @a() {
BB:
br label %BB6
BB6:
%tmp9 = phi i64 [ 0, %BB ], [ 5, %BB34 ]
br label %BB34
BB34:
br label %BB6
}