diff options
-rw-r--r-- | lib/Transforms/Scalar/CodeGenPrepare.cpp | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp index 37a645f..47e60cd 100644 --- a/lib/Transforms/Scalar/CodeGenPrepare.cpp +++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp @@ -930,8 +930,8 @@ bool CodeGenPrepare::OptimizeExtUses(Instruction *I) { return false; // Only safe to perform the optimization if the source is also defined in - // this block. - if (DefBB != cast<Instruction>(Src)->getParent()) + // this block. + if (!isa<Instruction>(Src) || DefBB != cast<Instruction>(Src)->getParent()) return false; bool DefIsLiveOut = false; @@ -948,6 +948,15 @@ bool CodeGenPrepare::OptimizeExtUses(Instruction *I) { if (!DefIsLiveOut) return false; + // Make sure non of the uses are PHI nodes. + for (Value::use_iterator UI = Src->use_begin(), E = Src->use_end(); + UI != E; ++UI) { + Instruction *User = cast<Instruction>(*UI); + if (User->getParent() == DefBB) continue; + if (isa<PHINode>(User)) + return false; + } + // InsertedTruncs - Only insert one trunc in each block once. DenseMap<BasicBlock*, Instruction*> InsertedTruncs; |