[Hexagon] Improve handling of unaligned vector loads and stores
llvm-svn: 264584
diff --git a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
index 81c85c4..ac91169 100644
--- a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
@@ -1086,14 +1086,16 @@
return;
unsigned LFS = MFI->getLocalFrameSize();
- int Offset = -LFS;
for (int i = 0, e = MFI->getObjectIndexEnd(); i != e; ++i) {
if (!MFI->isSpillSlotObjectIndex(i) || MFI->isDeadObjectIndex(i))
continue;
- int S = MFI->getObjectSize(i);
- LFS += S;
- Offset -= S;
- MFI->mapLocalFrameObject(i, Offset);
+ unsigned S = MFI->getObjectSize(i);
+ // Reduce the alignment to at most 8. This will require unaligned vector
+ // stores if they happen here.
+ unsigned A = std::max(MFI->getObjectAlignment(i), 8U);
+ MFI->setObjectAlignment(i, 8);
+ LFS = alignTo(LFS+S, A);
+ MFI->mapLocalFrameObject(i, -LFS);
}
MFI->setLocalFrameSize(LFS);