diff options
| author | Andrew Trick <atrick@apple.com> | 2012-05-22 17:39:59 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2012-05-22 17:39:59 +0000 |
| commit | 3de8ad8bf9081fcb7ec0600fd2a8d1ce809f556d (patch) | |
| tree | a49e2f9d56a995a8f8b37c6a4fdcfdf39d3369b3 /lib/Analysis/ScalarEvolutionExpander.cpp | |
| parent | 5c525b59d5e0036a778d278eeff4832edfd41357 (diff) | |
LSR fix: add a missing phi check during IV hoisting.
Fixes PR12898: SCEVExpander crash.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157263 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ScalarEvolutionExpander.cpp')
| -rw-r--r-- | lib/Analysis/ScalarEvolutionExpander.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp index 69507beeaa..e7fe672ad3 100644 --- a/lib/Analysis/ScalarEvolutionExpander.cpp +++ b/lib/Analysis/ScalarEvolutionExpander.cpp @@ -955,7 +955,8 @@ bool SCEVExpander::hoistIVInc(Instruction *IncV, Instruction *InsertPos) { // InsertPos must itself dominate IncV so that IncV's new position satisfies // its existing users. - if (!SE.DT->dominates(InsertPos->getParent(), IncV->getParent())) + if (isa<PHINode>(InsertPos) + || !SE.DT->dominates(InsertPos->getParent(), IncV->getParent())) return false; // Check that the chain of IV operands leading back to Phi can be hoisted. |