Fixed GEP visitor in the InstCombine pass.

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

diff --git a/lib/Transforms/InstCombine/InstructionCombining.cpp b/lib/Transforms/InstCombine/InstructionCombining.cpp
index f024ab1795ee25422da79832686220a35fb20b52..3ae7f08238b20f9137d44748cbe6953676b374fc 100644 (file)
--- a/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -1355,7 +1355,8 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) {
   // Eliminate unneeded casts for indices, and replace indices which displace
   // by multiples of a zero size type with zero.
   bool MadeChange = false;
-  Type *IntPtrTy = DL.getIntPtrType(GEP.getPointerOperandType());
+  Type *IntPtrTy =
+    DL.getIntPtrType(GEP.getPointerOperandType()->getScalarType());
 
   gep_type_iterator GTI = gep_type_begin(GEP);
   for (User::op_iterator I = GEP.op_begin() + 1, E = GEP.op_end(); I != E;
@@ -1365,21 +1366,25 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) {
     if (!SeqTy)
       continue;
 
+    // Index type should have the same width as IntPtr
+    Type *IndexTy = (*I)->getType();
+    Type *NewIndexType = IndexTy->isVectorTy() ?
+      VectorType::get(IntPtrTy, IndexTy->getVectorNumElements()) : IntPtrTy;
+ 
     // If the element type has zero size then any index over it is equivalent
     // to an index of zero, so replace it with zero if it is not zero already.
     if (SeqTy->getElementType()->isSized() &&
         DL.getTypeAllocSize(SeqTy->getElementType()) == 0)
       if (!isa<Constant>(*I) || !cast<Constant>(*I)->isNullValue()) {
-        *I = Constant::getNullValue(IntPtrTy);
+        *I = Constant::getNullValue(NewIndexType);
         MadeChange = true;
       }
 
-    Type *IndexTy = (*I)->getType();
-    if (IndexTy != IntPtrTy) {
+    if (IndexTy != NewIndexType) {
       // If we are using a wider index than needed for this platform, shrink
       // it to what we need.  If narrower, sign-extend it to what we need.
       // This explicit cast can make subsequent optimizations more obvious.
-      *I = Builder->CreateIntCast(*I, IntPtrTy, true);
+      *I = Builder->CreateIntCast(*I, NewIndexType, true);
       MadeChange = true;
     }
   }