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[[DAGCombiner][NFC] Add a comment. 

As suggested in D61846.

llvm-svn: 360755
This commit is contained in:
Clement Courbet 2019-05-15 08:21:18 +00:00
parent 041f40e5da
commit d9d0665d1c
1 changed files with 2 additions and 0 deletions
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2
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -19830,6 +19830,8 @@ bool DAGCombiner::isAlias(SDNode *Op0, SDNode *Op1) const {
return false; return false;
} }
// Try to prove that there is aliasing, or that there is no aliasing. Either
// way, we can return now. If nothing can be proved, proceed with more tests.
bool IsAlias; bool IsAlias;
if (BaseIndexOffset::computeAliasing(Op0, MUC0.NumBytes, Op1, MUC1.NumBytes, if (BaseIndexOffset::computeAliasing(Op0, MUC0.NumBytes, Op1, MUC1.NumBytes,
DAG, IsAlias)) DAG, IsAlias))