diff options
Diffstat (limited to 'llvm/lib/CodeGen/CodeGenPrepare.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/CodeGenPrepare.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp index d6a216f9..d11d74a 100644 --- a/llvm/lib/CodeGen/CodeGenPrepare.cpp +++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp @@ -1939,12 +1939,14 @@ bool CodeGenPrepare::optimizeCallInst(CallInst *CI, bool &ModifiedDT) { // If this is a memcpy (or similar) then we may be able to improve the // alignment if (MemIntrinsic *MI = dyn_cast<MemIntrinsic>(CI)) { - unsigned DestAlign = getKnownAlignment(MI->getDest(), *DL); - if (DestAlign > MI->getDestAlignment()) + Align DestAlign = getKnownAlignment(MI->getDest(), *DL); + MaybeAlign MIDestAlign = MI->getDestAlign(); + if (!MIDestAlign || DestAlign > *MIDestAlign) MI->setDestAlignment(DestAlign); if (MemTransferInst *MTI = dyn_cast<MemTransferInst>(MI)) { - unsigned SrcAlign = getKnownAlignment(MTI->getSource(), *DL); - if (SrcAlign > MTI->getSourceAlignment()) + MaybeAlign MTISrcAlign = MTI->getSourceAlign(); + Align SrcAlign = getKnownAlignment(MTI->getSource(), *DL); + if (!MTISrcAlign || SrcAlign > *MTISrcAlign) MTI->setSourceAlignment(SrcAlign); } } |