diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index b9afcc13b3d..01364944b22 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -5395,10 +5395,12 @@ static bool FindOptimalMemOpLowering(std::vector<EVT> &MemOps, // If the new VT cannot cover all of the remaining bits, then consider // issuing a (or a pair of) unaligned and overlapping load / store. + // FIXME: Only does this for 64-bit or more since we don't have proper + // cost model for unaligned load / store. bool Fast; - if (NumMemOps && AllowOverlap && NewVTSize < Size && - TLI.allowsMisalignedMemoryAccesses(VT, DstAS, DstAlign, &Fast) && - Fast) + if (NumMemOps && AllowOverlap && + VTSize >= 8 && NewVTSize < Size && + TLI.allowsMisalignedMemoryAccesses(VT, DstAS, DstAlign, &Fast) && Fast) VTSize = Size; else { VT = NewVT; |
