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Use TargetSubtargetInfo::useAA() in DAGCombine 

This uses the TargetSubtargetInfo::useAA() function to control the defaults of
the -combiner-alias-analysis and -combiner-global-alias-analysis options.

llvm-svn: 189564
This commit is contained in:
Hal Finkel 2013-08-29 03:29:55 +00:00
parent b350ffd1b1
commit 5ef4dccdce
1 changed files with 10 additions and 3 deletions
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13
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -35,6 +35,7 @@
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetSubtargetInfo.h"
#include <algorithm>
using namespace llvm;
@ -7488,7 +7489,9 @@ SDValue DAGCombiner::visitLOAD(SDNode *N) {
}
}
if (CombinerAA) {
bool UseAA = CombinerAA.getNumOccurrences() > 0 ? CombinerAA :
TLI.getTargetMachine().getSubtarget<TargetSubtargetInfo>().useAA();
if (UseAA) {
// Walk up chain skipping non-aliasing memory nodes.
SDValue BetterChain = FindBetterChain(N, Chain);
@ -8519,7 +8522,9 @@ SDValue DAGCombiner::visitSTORE(SDNode *N) {
if (NewST.getNode())
return NewST;
if (CombinerAA) {
bool UseAA = CombinerAA.getNumOccurrences() > 0 ? CombinerAA :
TLI.getTargetMachine().getSubtarget<TargetSubtargetInfo>().useAA();
if (UseAA) {
// Walk up chain skipping non-aliasing memory nodes.
SDValue BetterChain = FindBetterChain(N, Chain);
@ -10229,7 +10234,9 @@ bool DAGCombiner::isAlias(SDValue Ptr1, int64_t Size1,
return false;
}
if (CombinerGlobalAA) {
bool UseAA = CombinerGlobalAA.getNumOccurrences() > 0 ? CombinerGlobalAA :
TLI.getTargetMachine().getSubtarget<TargetSubtargetInfo>().useAA();
if (UseAA) {
// Use alias analysis information.
int64_t MinOffset = std::min(SrcValueOffset1, SrcValueOffset2);
int64_t Overlap1 = Size1 + SrcValueOffset1 - MinOffset;