[llvm] [AMDGPU] Fix typo in v_dot4 combine (PR #115224)

[Jeffrey Byrnes via llvm-commits]

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@@ -3450,4 +3450,850 @@ entry:
 }
 
 
+define amdgpu_kernel void @ByteOffsetCorrectness(ptr addrspace(1) noalias readonly align 16 %inptr0, ptr addrspace(1) noalias readonly align 16 %inptr1, ptr addrspace(1) noalias align 16 %inptr2) local_unnamed_addr {
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jrbyrnes wrote:

The behavior is actually a bit difficult to reproduce with a small concise example -- optimizations / DAG building consistently transform the code in a way which hides the issue. 

https://github.com/llvm/llvm-project/pull/115224