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-rw-r--r--lib/Transforms/Scalar/GVN.cpp12
1 files changed, 7 insertions, 5 deletions
diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index 2384e59..1f3ecfa 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -726,19 +726,21 @@ Value *GVN::GetValueForBlock(BasicBlock *BB, LoadInst* orig,
bool top_level) {
// If we have already computed this value, return the previously computed val.
- Value *&V = Phis[BB];
+ Value *V = Phis[BB];
if (V && ! top_level) return V;
BasicBlock* singlePred = BB->getSinglePredecessor();
- if (singlePred)
- return V = GetValueForBlock(singlePred, orig, Phis);
-
+ if (singlePred) {
+ V = GetValueForBlock(singlePred, orig, Phis);
+ Phis[BB] = V;
+ return V;
+ }
// Otherwise, the idom is the loop, so we need to insert a PHI node. Do so
// now, then get values to fill in the incoming values for the PHI.
PHINode *PN = new PHINode(orig->getType(), orig->getName()+".rle",
BB->begin());
PN->reserveOperandSpace(std::distance(pred_begin(BB), pred_end(BB)));
- V = PN;
+ Phis[BB] = PN;
bool all_same = true;
Value* first = 0;