diff options
| author | Nirav Dave <niravd@google.com> | 2017-12-22 22:06:56 +0000 |
|---|---|---|
| committer | Nirav Dave <niravd@google.com> | 2017-12-22 22:06:56 +0000 |
| commit | e1b8f14c6dd0b254a547f03a5dfd6fee6249f847 (patch) | |
| tree | fa9c5aa45b62c80f852a9dde4e4fb81ec64f215f /lib/CodeGen | |
| parent | 5d9f5f40885da16ed6f4e9ee7c96a3547500d900 (diff) | |
[DAG] Add missing case check from findbaseoffset merge from r321389.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321391 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 5bab282cb09..99c450e612b 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -17453,8 +17453,10 @@ bool DAGCombiner::isAlias(LSBaseSDNode *Op0, LSBaseSDNode *Op1) const { bool IsCV0 = isa<ConstantPoolSDNode>(BasePtr0.getBase()); bool IsCV1 = isa<ConstantPoolSDNode>(BasePtr1.getBase()); - // If of mismatched base types they do not alias. - if (((IsFI0 != IsFI1) || (IsGV0 != IsGV1) || (IsCV0 != IsCV1)) && + // If of mismatched base types or checkable indices we can check + // they do not alias. + if ((BasePtr0.getIndex() == BasePtr1.getIndex() || (IsFI0 != IsFI1) || + (IsGV0 != IsGV1) || (IsCV0 != IsCV1)) && (IsFI0 || IsGV0 || IsCV0) && (IsFI1 || IsGV1 || IsCV1)) return false; |