Change Details

Simplify cycle and generalize validity checks in ISel (HandleMergeInputChains, findNonImmUse) enabling some instruction matches. Also, we now catch loops going through indirect chain dependencies earlier in ISel matching. These two checks should be now use the DAG predecessor framework and should be mergable into a single cheaper check. As part of this propogate the NodeId-based cutoffs to narrow hasPreprocessorHelper searches.

Cleanup cycle/validity checks in ISel (IsLegalToFold, HandleMergeInputChains). Now attempt to do a full search for cycles pruning with NodeId when possible. As part of this propagate the NodeId-based cutoffs to narrow hasPreprocessorHelper searches.

Simplify cycle and generalize validity checks in ISel (HandleMergeInputChains,Cleanup cycle/validity checks in ISel (IsLegalToFold, HandleMergeInputChains). Now attempt to do a full search for cycles pruning with NodeId when possible. findNonImmUse) enabling some instruction matches. Also, we now catch loops going As part of this propagate the NodeId-based cutoffs to narrow hasPreprocessorHelper searches. through indirect chain dependencies earlier in ISel matching. These two checks should be now use the DAG predecessor framework and should be mergable into a single cheaper check. As part of this propogate the NodeId-based cutoffs to narrow hasPreprocessorHelper searches.