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| author | Evan Cheng <evan.cheng@apple.com> | 2009-12-09 01:53:58 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-12-09 01:53:58 +0000 |
| commit | 7bd6478cd6a1264f884b46f3694af3a68a6fab0a (patch) | |
| tree | 26d107e2bd6e67dd5d7d9ffae1e180be6740f907 /lib/Target/X86 | |
| parent | a963306eede2aaa90d70661e85895d99eb80327e (diff) | |
| download | external_llvm-7bd6478cd6a1264f884b46f3694af3a68a6fab0a.zip external_llvm-7bd6478cd6a1264f884b46f3694af3a68a6fab0a.tar.gz external_llvm-7bd6478cd6a1264f884b46f3694af3a68a6fab0a.tar.bz2 | |
Teach InferPtrAlignment to infer GV+cst alignment and use it to simplify x86 isl lowering code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90925 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 12 |
1 files changed, 1 insertions, 11 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index d66f754..38e1ffe 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -8327,16 +8327,6 @@ bool X86TargetLowering::isGAPlusOffset(SDNode *N, return TargetLowering::isGAPlusOffset(N, GA, Offset); } -static bool isBaseAlignmentOfN(unsigned N, SDNode *Base, - const TargetLowering &TLI) { - GlobalValue *GV; - int64_t Offset = 0; - if (TLI.isGAPlusOffset(Base, GV, Offset)) - return (GV->getAlignment() >= N && (Offset % N) == 0); - // DAG combine handles the stack object case. - return false; -} - static bool EltsFromConsecutiveLoads(ShuffleVectorSDNode *N, unsigned NumElems, EVT EltVT, LoadSDNode *&LDBase, unsigned &LastLoadedElt, @@ -8399,7 +8389,7 @@ static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG, return SDValue(); if (LastLoadedElt == NumElems - 1) { - if (isBaseAlignmentOfN(16, LD->getBasePtr().getNode(), TLI)) + if (DAG.InferPtrAlignment(LD->getBasePtr()) >= 16) return DAG.getLoad(VT, dl, LD->getChain(), LD->getBasePtr(), LD->getSrcValue(), LD->getSrcValueOffset(), LD->isVolatile()); |