[clang] [llvm] [NVPTX] Support i256 load/store with 256-bit vector load (PR #155198)

[Drew Kersnar via llvm-commits]

================
@@ -3085,9 +3089,114 @@ SDValue NVPTXTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
                       MachinePointerInfo(SV));
 }
 
+/// ReplaceVectorLoad - Convert vector loads into multi-output scalar loads.
----------------
dakersnar wrote:

Nit: now would be a good time to fix this comment, something like
```suggestion
/// replaceLoadVector - Convert vector loads into multi-output scalar loads.
```

https://github.com/llvm/llvm-project/pull/155198