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Add a RemoveFromWorklist method to DCI. This is needed to do some complicated

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transformations in target-specific DAG combines without causing DAGCombiner to
delete the same node twice. If you know of a better way to avoid this (see my
next patch for an example), please let me know.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128758 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich 2011-04-02 02:40:26 +00:00
parent 04187ecd57
commit ed3caf9086
2 changed files with 5 additions and 0 deletions
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1
include/llvm/Target/TargetLowering.h
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@ -927,6 +927,7 @@ public:
bool isCalledByLegalizer() const { return CalledByLegalizer; }
void AddToWorklist(SDNode *N);
void RemoveFromWorklist(SDNode *N);
SDValue CombineTo(SDNode *N, const std::vector<SDValue> &To,
bool AddTo = true);
SDValue CombineTo(SDNode *N, SDValue Res, bool AddTo = true);

4
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -319,6 +319,10 @@ void TargetLowering::DAGCombinerInfo::AddToWorklist(SDNode *N) {
((DAGCombiner*)DC)->AddToWorkList(N);
}
void TargetLowering::DAGCombinerInfo::RemoveFromWorklist(SDNode *N) {
((DAGCombiner*)DC)->removeFromWorkList(N);
}
SDValue TargetLowering::DAGCombinerInfo::
CombineTo(SDNode *N, const std::vector<SDValue> &To, bool AddTo) {
return ((DAGCombiner*)DC)->CombineTo(N, &To[0], To.size(), AddTo);