[llvm] [AMDGPU] Fix copy-paste in hasNon16BitAccesses OpIs16Bit check (PR #203499)

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<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Arseniy Obolenskiy (aobolensk)

<details>
<summary>Changes</summary>

OpIs16Bit tested TempOtherOp width instead of TempOp, mismatching symmetric OtherOpIs16Bit clause

No observed miscompiles or direct issues to due to that so far

---
Full diff: https://github.com/llvm/llvm-project/pull/203499.diff


1 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/SIISelLowering.cpp (+1-1) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index eb3b869990cdd..30950f8f5d9e5 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -15070,7 +15070,7 @@ static bool hasNon16BitAccesses(uint64_t PermMask, SDValue &Op,
   auto TempOtherOp = peekThroughBitcasts(OtherOp);
 
   auto OpIs16Bit =
-      TempOtherOp.getValueSizeInBits() == 16 || isExtendedFrom16Bits(TempOp);
+      TempOp.getValueSizeInBits() == 16 || isExtendedFrom16Bits(TempOp);
   if (!OpIs16Bit)
     return true;
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/203499