[llvm] [AMDGPU][GlobalISel] Allow selecting buffer_load/store of pointers (PR #110714)

[Krzysztof Drewniak via llvm-commits]

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@@ -5805,6 +5806,10 @@ Register AMDGPULegalizerInfo::fixStoreSourceType(
   if (hasBufferRsrcWorkaround(Ty))
     return castBufferRsrcToV4I32(VData, B);
 
+  if (shouldBitcastLoadStoreType(ST, Ty, MemTy) || Ty.isPointerVector()) {
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krzysz00 wrote:

Except that a regular G_LOAD or G_STORE can handle vectors of pointers just fine, and moving the condition changes a bunch of tests 

https://github.com/llvm/llvm-project/pull/110714