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Generalize the transform that boosts GEP indices to the size of a pointer to

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also do it for vectors of pointers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167354 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2012-11-03 11:44:17 +00:00
parent 3c77033a90
commit c5b969a019
2 changed files with 13 additions and 2 deletions
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4
lib/Transforms/InstCombine/InstructionCombining.cpp
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@ -1055,7 +1055,7 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) {
// by multiples of a zero size type with zero.
if (TD) {
bool MadeChange = false;
Type *IntPtrTy = TD->getIntPtrType(GEP.getContext());
Type *IntPtrTy = TD->getIntPtrType(GEP.getPointerOperandType());
gep_type_iterator GTI = gep_type_begin(GEP);
for (User::op_iterator I = GEP.op_begin() + 1, E = GEP.op_end();
@ -1074,7 +1074,7 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) {
}
Type *IndexTy = (*I)->getType();
if (IndexTy != IntPtrTy && !IndexTy->isVectorTy()) {
if (IndexTy != IntPtrTy) {
// 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.