[llvm] [AMDGPU] Fix uniform fcopysign pattern (PR #218644)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,122 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1101 -stop-after=amdgpu-isel -o - %s | FileCheck %s
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1101 -verify-machineinstrs -o - %s | FileCheck --check-prefix=ASM %s
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arsenm wrote:

```suggestion
; RUN: llc -mtriple=amdgpu11.01-amd-amdhsa -stop-after=amdgpu-isel -o - %s | FileCheck %s
; RUN: llc -mtriple=amdgpu11.01-amd-amdhsa -o - %s | FileCheck --check-prefix=ASM %s
```

https://github.com/llvm/llvm-project/pull/218644