Don't duplicate the work done by a gep into a "bitcast" if the gep has

[oota-llvm.git] / lib / Transforms / InstCombine / InstCombineLoadStoreAlloca.cpp

diff --git a/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp b/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
index 35c1d91d501663566a2feea3492df8f17c08bb6c..f499290fe87618781148d806b421d76b4e50aed4 100644 (file)
--- a/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
+++ b/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
@@ -57,12 +57,14 @@ Instruction *InstCombiner::visitAllocaInst(AllocaInst &AI) {
       Value *Idx[2];
       Idx[0] = NullIdx;
       Idx[1] = NullIdx;
-      Value *V = GetElementPtrInst::CreateInBounds(New, Idx, Idx + 2,
-                                                   New->getName()+".sub", It);
+      Instruction *GEP =
+           GetElementPtrInst::CreateInBounds(New, Idx, Idx + 2,
+                                             New->getName()+".sub");
+      InsertNewInstBefore(GEP, *It);
 
       // Now make everything use the getelementptr instead of the original
       // allocation.
-      return ReplaceInstUsesWith(AI, V);
+      return ReplaceInstUsesWith(AI, GEP);
     } else if (isa<UndefValue>(AI.getArraySize())) {
       return ReplaceInstUsesWith(AI, Constant::getNullValue(AI.getType()));
     }
@@ -591,8 +593,7 @@ bool InstCombiner::SimplifyStoreAtEndOfBlock(StoreInst &SI) {
   // Insert a PHI node now if we need it.
   Value *MergedVal = OtherStore->getOperand(0);
   if (MergedVal != SI.getOperand(0)) {
-    PHINode *PN = PHINode::Create(MergedVal->getType(), "storemerge");
-    PN->reserveOperandSpace(2);
+    PHINode *PN = PHINode::Create(MergedVal->getType(), 2, "storemerge");
     PN->addIncoming(SI.getOperand(0), SI.getParent());
     PN->addIncoming(OtherStore->getOperand(0), OtherBB);
     MergedVal = InsertNewInstBefore(PN, DestBB->front());
@@ -601,10 +602,12 @@ bool InstCombiner::SimplifyStoreAtEndOfBlock(StoreInst &SI) {
   // Advance to a place where it is safe to insert the new store and
   // insert it.
   BBI = DestBB->getFirstNonPHI();
-  InsertNewInstBefore(new StoreInst(MergedVal, SI.getOperand(1),
-                                    OtherStore->isVolatile(),
-                                    SI.getAlignment()), *BBI);
-  
+  StoreInst *NewSI = new StoreInst(MergedVal, SI.getOperand(1),
+                                   OtherStore->isVolatile(),
+                                   SI.getAlignment());
+  InsertNewInstBefore(NewSI, *BBI);
+  NewSI->setDebugLoc(OtherStore->getDebugLoc()); 
+
   // Nuke the old stores.
   EraseInstFromFunction(SI);
   EraseInstFromFunction(*OtherStore);