diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 26cb3a69cf6..af3d17059f0 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -4593,6 +4593,10 @@ SDValue DAGCombiner::MatchLoadCombine(SDNode *N) { assert((BigEndian != LittleEndian) && "should be either or"); assert(FirstByteProvider && "must be set"); + // Ensure that the first byte is loaded from zero offset of the first load. + // So the combined value can be loaded from the first load address. + if (MemoryByteOffset(*FirstByteProvider) != 0) + return SDValue(); LoadSDNode *FirstLoad = FirstByteProvider->Load; // The node we are looking at matches with the pattern, check if we can |
