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
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 @@
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 @@
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());