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| author | Hal Finkel <hfinkel@anl.gov> | 2014-01-25 17:32:39 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2014-01-25 17:32:39 +0000 |
| commit | 7a1fc7ad5000f4b8fc4b2968e760514f1c5f228a (patch) | |
| tree | 69b131dff860781a349274c847baf41719e8de44 /lib/CodeGen | |
| parent | f62acf3c549d586be3b89b6c4acb2f1ad7a17cf2 (diff) | |
| download | llvm-7a1fc7ad5000f4b8fc4b2968e760514f1c5f228a.tar.gz llvm-7a1fc7ad5000f4b8fc4b2968e760514f1c5f228a.tar.bz2 llvm-7a1fc7ad5000f4b8fc4b2968e760514f1c5f228a.tar.xz | |
Add combiner-aa-only-func (debug only)
This option (which is !NDEBUG only) allows restricting the use of alias
analysis in DAGCombiner to a specific function. This has proved extremely
valuable to isolating bugs related to this feature, and mirrors the
misched-only-func option provided by the new instruction scheduler.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200088 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 72628ef05c..af7519a88e 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -56,6 +56,13 @@ namespace { CombinerGlobalAA("combiner-global-alias-analysis", cl::Hidden, cl::desc("Enable DAG combiner's use of IR alias analysis")); +#ifndef NDEBUG + static cl::opt<std::string> + CombinerAAOnlyFunc("combiner-aa-only-func", cl::Hidden, + cl::desc("Only use DAG-combiner alias analysis in this" + " function")); +#endif + /// Hidden option to stress test load slicing, i.e., when this option /// is enabled, load slicing bypasses most of its profitability guards. static cl::opt<bool> @@ -7729,6 +7736,11 @@ SDValue DAGCombiner::visitLOAD(SDNode *N) { bool UseAA = CombinerAA.getNumOccurrences() > 0 ? CombinerAA : TLI.getTargetMachine().getSubtarget<TargetSubtargetInfo>().useAA(); +#ifndef NDEBUG + if (CombinerAAOnlyFunc.getNumOccurrences() && + CombinerAAOnlyFunc != DAG.getMachineFunction().getName()) + UseAA = false; +#endif if (UseAA && LD->isUnindexed()) { // Walk up chain skipping non-aliasing memory nodes. SDValue BetterChain = FindBetterChain(N, Chain); @@ -9317,6 +9329,11 @@ SDValue DAGCombiner::visitSTORE(SDNode *N) { bool UseAA = CombinerAA.getNumOccurrences() > 0 ? CombinerAA : TLI.getTargetMachine().getSubtarget<TargetSubtargetInfo>().useAA(); +#ifndef NDEBUG + if (CombinerAAOnlyFunc.getNumOccurrences() && + CombinerAAOnlyFunc != DAG.getMachineFunction().getName()) + UseAA = false; +#endif if (UseAA && ST->isUnindexed()) { // Walk up chain skipping non-aliasing memory nodes. SDValue BetterChain = FindBetterChain(N, Chain); @@ -11051,6 +11068,11 @@ bool DAGCombiner::isAlias(SDValue Ptr1, int64_t Size1, bool IsVolatile1, bool UseAA = CombinerGlobalAA.getNumOccurrences() > 0 ? CombinerGlobalAA : TLI.getTargetMachine().getSubtarget<TargetSubtargetInfo>().useAA(); +#ifndef NDEBUG + if (CombinerAAOnlyFunc.getNumOccurrences() && + CombinerAAOnlyFunc != DAG.getMachineFunction().getName()) + UseAA = false; +#endif if (UseAA && SrcValue1 && SrcValue2) { // Use alias analysis information. int64_t MinOffset = std::min(SrcValueOffset1, SrcValueOffset2); |