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| author | Owen Anderson <resistor@mac.com> | 2008-07-18 17:46:41 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2008-07-18 17:46:41 +0000 |
| commit | ddf4d8ef3afc0334e29351730748cda0ab92f9d0 (patch) | |
| tree | 78d126f0e3bb29da0bd5f4738640b9a303ecf06c /lib/Transforms/Utils | |
| parent | 40c70bb1f6b69fa1ac615387584d338442017e2e (diff) | |
| download | external_llvm-ddf4d8ef3afc0334e29351730748cda0ab92f9d0.zip external_llvm-ddf4d8ef3afc0334e29351730748cda0ab92f9d0.tar.gz external_llvm-ddf4d8ef3afc0334e29351730748cda0ab92f9d0.tar.bz2 | |
Add some checks that got lost in the shuffle. This fixes 464.h264ref.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53760 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils')
| -rw-r--r-- | lib/Transforms/Utils/BasicBlockUtils.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/BasicBlockUtils.cpp b/lib/Transforms/Utils/BasicBlockUtils.cpp index d889422..719bc8a 100644 --- a/lib/Transforms/Utils/BasicBlockUtils.cpp +++ b/lib/Transforms/Utils/BasicBlockUtils.cpp @@ -39,6 +39,10 @@ bool llvm::MergeBlockIntoPredecessor(BasicBlock* BB, Pass* P) { // Can't merge if there are multiple predecessors. if (!PredBB) return false; + // Don't break self-loops. + if (PredBB == BB) return false; + // Don't break invokes. + if (isa<InvokeInst>(PredBB->getTerminator())) return false; succ_iterator SI(succ_begin(PredBB)), SE(succ_end(PredBB)); BasicBlock* OnlySucc = BB; |