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| author | Chris Lattner <sabre@nondot.org> | 2008-02-14 19:18:13 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-02-14 19:18:13 +0000 |
| commit | 3ff699e93c8ae7b636ddb4493a88206a72371506 (patch) | |
| tree | ba5107e2c2686f6207dbfa42ec3faa375a74571d /lib/Transforms/Utils | |
| parent | 69946fdd7428f0a1ccc7defc7c06533817bbf80e (diff) | |
| download | external_llvm-3ff699e93c8ae7b636ddb4493a88206a72371506.zip external_llvm-3ff699e93c8ae7b636ddb4493a88206a72371506.tar.gz external_llvm-3ff699e93c8ae7b636ddb4493a88206a72371506.tar.bz2 | |
Fix PR2029
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47129 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils')
| -rw-r--r-- | lib/Transforms/Utils/LowerInvoke.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/LowerInvoke.cpp b/lib/Transforms/Utils/LowerInvoke.cpp index 39738a0..920a028 100644 --- a/lib/Transforms/Utils/LowerInvoke.cpp +++ b/lib/Transforms/Utils/LowerInvoke.cpp @@ -256,6 +256,17 @@ void LowerInvoke::rewriteExpensiveInvoke(InvokeInst *II, unsigned InvokeNo, SwitchInst *CatchSwitch) { ConstantInt *InvokeNoC = ConstantInt::get(Type::Int32Ty, InvokeNo); + // If the unwind edge has phi nodes, split the edge. + if (isa<PHINode>(II->getUnwindDest()->begin())) { + SplitCriticalEdge(II, 1, this); + + // If there are any phi nodes left, they must have a single predecessor. + while (PHINode *PN = dyn_cast<PHINode>(II->getUnwindDest()->begin())) { + PN->replaceAllUsesWith(PN->getIncomingValue(0)); + PN->eraseFromParent(); + } + } + // Insert a store of the invoke num before the invoke and store zero into the // location afterward. new StoreInst(InvokeNoC, InvokeNum, true, II); // volatile |