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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 | 1468bec06e92fa040bbb7e7443fc0daadffb7234 (patch) | |
| tree | 9d7b5747e74843fd14bb14834a217f9b0be4708a /llvm/lib/Transforms/Utils/BasicBlockUtils.cpp | |
| parent | f7faa42c6c19a1da9320cfbc759dfd3222994cc3 (diff) | |
| download | bcm5719-llvm-1468bec06e92fa040bbb7e7443fc0daadffb7234.tar.gz bcm5719-llvm-1468bec06e92fa040bbb7e7443fc0daadffb7234.zip | |
Add some checks that got lost in the shuffle. This fixes 464.h264ref.
llvm-svn: 53760
Diffstat (limited to 'llvm/lib/Transforms/Utils/BasicBlockUtils.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/BasicBlockUtils.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp index d889422992b..719bc8a34f8 100644 --- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp +++ b/llvm/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; |
