diff options
| author | Dan Gohman <gohman@apple.com> | 2009-11-05 19:41:37 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-11-05 19:41:37 +0000 |
| commit | a6a4aaefeea8622e022723f27b7e845997b81f64 (patch) | |
| tree | 9aa092d044982f00e5a7c46c90e2af511f4ced6e /lib/Analysis/IVUsers.cpp | |
| parent | 6890584ab16d425865cb4b833fd809313d28e566 (diff) | |
Fix IVUsers to avoid assuming that the loop has a unique backedge.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86161 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/IVUsers.cpp')
| -rw-r--r-- | lib/Analysis/IVUsers.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Analysis/IVUsers.cpp b/lib/Analysis/IVUsers.cpp index 543e017fc9..20b69f2a7c 100644 --- a/lib/Analysis/IVUsers.cpp +++ b/lib/Analysis/IVUsers.cpp @@ -151,6 +151,8 @@ static bool IVUseShouldUsePostIncValue(Instruction *User, Instruction *IV, if (L->contains(User->getParent())) return false; BasicBlock *LatchBlock = L->getLoopLatch(); + if (!LatchBlock) + return false; // Ok, the user is outside of the loop. If it is dominated by the latch // block, use the post-inc value. |