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Fix 4366: store to null in non-default addr space should not be

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turned into unreachable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73195 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-06-11 17:54:56 +00:00
parent 6396329d52
commit 3590abfda0
2 changed files with 9 additions and 1 deletions
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3
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -11824,7 +11824,8 @@ Instruction *InstCombiner::visitStoreInst(StoreInst &SI) {
if (SI.isVolatile()) return 0; // Don't hack volatile stores.
// store X, null -> turns into 'unreachable' in SimplifyCFG
if (isa<ConstantPointerNull>(Ptr)) {
if (isa<ConstantPointerNull>(Ptr) &&
cast<PointerType>(Ptr->getType())->getAddressSpace() == 0) {
if (!isa<UndefValue>(Val)) {
SI.setOperand(0, UndefValue::get(Val->getType()));
if (Instruction *U = dyn_cast<Instruction>(Val))

7
test/Transforms/InstCombine/2009-06-11-StoreAddrSpace.ll Normal file
View File

@ -0,0 +1,7 @@
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep store
; PR4366
define void @a() {
store i32 0, i32 addrspace(1)* null
ret void
}