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Fix this regression and remove the XFAIL from this test.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18674 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos
2004-12-08 23:10:30 +00:00
parent 8690180f49
commit 54a96a2ad6
2 changed files with 5 additions and 4 deletions
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8
lib/Transforms/Scalar/InstructionCombining.cpp
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@@ -4216,9 +4216,11 @@ bool InstCombiner::runOnFunction(Function &F) {
// Instruction isn't dead, see if we can constant propagate it...
if (Constant *C = ConstantFoldInstruction(I)) {
Value* Ptr = I->getOperand(0);
if (isa<GetElementPtrInst>(I) &&
cast<Constant>(I->getOperand(0))->isNullValue() &&
!isa<ConstantPointerNull>(C)) {
cast<Constant>(Ptr)->isNullValue() &&
!isa<ConstantPointerNull>(C) &&
cast<PointerType>(Ptr->getType())->getElementType()->isSized()) {
// If this is a constant expr gep that is effectively computing an
// "offsetof", fold it into 'cast int X to T*' instead of 'gep 0, 0, 12'
bool isFoldableGEP = true;
@@ -4226,7 +4228,7 @@ bool InstCombiner::runOnFunction(Function &F) {
if (!isa<ConstantInt>(I->getOperand(i)))
isFoldableGEP = false;
if (isFoldableGEP) {
uint64_t Offset = TD->getIndexedOffset(I->getOperand(0)->getType(),
uint64_t Offset = TD->getIndexedOffset(Ptr->getType(),
std::vector<Value*>(I->op_begin()+1, I->op_end()));
C = ConstantUInt::get(Type::ULongTy, Offset);
C = ConstantExpr::getCast(C, TD->getIntPtrType());