[llvm] [AMDGPU] Skip handling of non-byte types in promote alloca. (PR #128769)

[Matt Arsenault via llvm-commits]

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@@ -759,6 +759,14 @@ bool AMDGPUPromoteAllocaImpl::tryPromoteAllocaToVector(AllocaInst &Alloca) {
     return false;
   }
 
+  Type *VecEltTy = VectorTy->getElementType();
+  constexpr unsigned SIZE_OF_BYTE = 8;
+  unsigned ElementSizeInBits = DL->getTypeSizeInBits(VecEltTy);
+  // FIXME: The non-byte type like i1 can be packed and be supported, but
+  // currently we do not handle them.
+  if (ElementSizeInBits % SIZE_OF_BYTE != 0)
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arsenm wrote:

Best to replicate typeSizeEqualsStoreSize 

https://github.com/llvm/llvm-project/pull/128769