diff options
| -rw-r--r-- | lib/Transforms/Scalar/LoopUnroll.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/LoopUnroll.cpp b/lib/Transforms/Scalar/LoopUnroll.cpp index eff35e4f14..63696025cb 100644 --- a/lib/Transforms/Scalar/LoopUnroll.cpp +++ b/lib/Transforms/Scalar/LoopUnroll.cpp @@ -304,6 +304,12 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) { (*SI)->removeIncomingValue(LatchBlock, false); if (InVal) (*SI)->addIncoming(InVal, cast<BasicBlock>(LastValueMap[LatchBlock])); + if ((*SI)->getNumIncomingValues() == 0) { + // Remove this phi node. + // If anyone is using this PHI, make them use a dummy value instead... + (*SI)->replaceAllUsesWith(UndefValue::get((*SI)->getType())); + (*SI)->eraseFromParent(); + } } } |