[llvm] [AMDGPU] Make fneg/fabs/copysign legal for bf16 (PR #91676)

[Matt Arsenault via llvm-commits]

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@@ -1947,6 +1947,20 @@ def : GCNPat <
   (S_OR_B32 SReg_32:$src, (S_MOV_B32 (i32 0x80008000))) // Set sign bit
 >;
 
+def : GCNPat <
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arsenm wrote:

These ones are still duplicated? 

https://github.com/llvm/llvm-project/pull/91676