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| author | Chris Lattner <sabre@nondot.org> | 2009-11-02 04:37:17 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-11-02 04:37:17 +0000 |
| commit | c9661b6764715959f2b35c795af1dfbe5a92bbb6 (patch) | |
| tree | db89468b37aeb8857472b25c6a0b977cab71eb56 /lib/Transforms/Utils | |
| parent | aae7a3d378ed2f64bb369ad672439f08fb8e685c (diff) | |
| download | external_llvm-c9661b6764715959f2b35c795af1dfbe5a92bbb6.zip external_llvm-c9661b6764715959f2b35c795af1dfbe5a92bbb6.tar.gz external_llvm-c9661b6764715959f2b35c795af1dfbe5a92bbb6.tar.bz2 | |
fix a bug exposed by moving SRoA earlier which caused a crash building kc++
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85786 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils')
| -rw-r--r-- | lib/Transforms/Utils/PromoteMemoryToRegister.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp index b70276e..de6ad1d 100644 --- a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp +++ b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp @@ -749,7 +749,12 @@ void PromoteMem2Reg::RewriteSingleStoreAlloca(AllocaInst *AI, } // Otherwise, we *can* safely rewrite this load. - LI->replaceAllUsesWith(OnlyStore->getOperand(0)); + Value *ReplVal = OnlyStore->getOperand(0); + // If the replacement value is the load, this must occur in unreachable + // code. + if (ReplVal == LI) + ReplVal = UndefValue::get(LI->getType()); + LI->replaceAllUsesWith(ReplVal); if (AST && isa<PointerType>(LI->getType())) AST->deleteValue(LI); LI->eraseFromParent(); |