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| author | Mon P Wang <wangmp@apple.com> | 2009-02-07 22:19:29 +0000 |
|---|---|---|
| committer | Mon P Wang <wangmp@apple.com> | 2009-02-07 22:19:29 +0000 |
| commit | bd05ed8f30204072872fc02a416a67d5f9941451 (patch) | |
| tree | 535f6b5cd5b1cf8961f5897ba1eeb141ed15c9ff /lib | |
| parent | 2dbdb0ea777a13c6fa8e9fe708e728a84752c20a (diff) | |
| download | external_llvm-bd05ed8f30204072872fc02a416a67d5f9941451.zip external_llvm-bd05ed8f30204072872fc02a416a67d5f9941451.tar.gz external_llvm-bd05ed8f30204072872fc02a416a67d5f9941451.tar.bz2 | |
Instrcombine should not change load(cast p) to cast(load p) if the cast
changes the address space of the pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64035 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 97af83f..b426274 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -11007,8 +11007,14 @@ static Instruction *InstCombineLoadCast(InstCombiner &IC, LoadInst &LI, } } - const Type *DestPTy = cast<PointerType>(CI->getType())->getElementType(); + const PointerType *DestTy = cast<PointerType>(CI->getType()); + const Type *DestPTy = DestTy->getElementType(); if (const PointerType *SrcTy = dyn_cast<PointerType>(CastOp->getType())) { + + // If the address spaces don't match, don't eliminate the cast. + if (DestTy->getAddressSpace() != SrcTy->getAddressSpace()) + return 0; + const Type *SrcPTy = SrcTy->getElementType(); if (DestPTy->isInteger() || isa<PointerType>(DestPTy) || |