diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopUnswitch.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopUnswitch.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp index 61a043596d..b0be443c11 100644 --- a/lib/Transforms/Scalar/LoopUnswitch.cpp +++ b/lib/Transforms/Scalar/LoopUnswitch.cpp @@ -325,7 +325,9 @@ static bool IsTrivialUnswitchCondition(Loop *L, Value *Cond, Constant **Val = 0, } } - if (!LoopExitBB) + // If we didn't find a single unique LoopExit block, or if the loop exit block + // contains phi nodes, this isn't trivial. + if (!LoopExitBB || isa<PHINode>(LoopExitBB->begin())) return false; // Can't handle this. if (LoopExit) *LoopExit = LoopExitBB; |