AMDGPU: Fix introducing stack access on unaligned v16i8

llvm-svn: 280298

1 files changed, 8 insertions, 1 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
index 32e40a2c7a7..682157bc4ca 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -2012,6 +2012,9 @@ SDValue AMDGPUTargetLowering::performLoadCombine(SDNode *N,
     // problems during legalization, the emitted instructions to pack and unpack
     // the bytes again are not eliminated in the case of an unaligned copy.
     if (!allowsMisalignedMemoryAccesses(VT, AS, Align, &IsFast)) {
+      if (VT.isVector())
+        return scalarizeVectorLoad(LN, DAG);
+
       SDValue Ops[2];
       std::tie(Ops[0], Ops[1]) = expandUnalignedLoad(LN, DAG);
       return DAG.getMergeValues(Ops, SDLoc(N));
@@ -2060,8 +2063,12 @@ SDValue AMDGPUTargetLowering::performStoreCombine(SDNode *N,
     // order problems during legalization, the emitted instructions to pack and
     // unpack the bytes again are not eliminated in the case of an unaligned
     // copy.
-    if (!allowsMisalignedMemoryAccesses(VT, AS, Align, &IsFast))
+    if (!allowsMisalignedMemoryAccesses(VT, AS, Align, &IsFast)) {
+      if (VT.isVector())
+        return scalarizeVectorStore(SN, DAG);
+
       return expandUnalignedStore(SN, DAG);
+    }
 
     if (!IsFast)
       return SDValue();