[llvm] [amdgpu] Add HasBufferInv AMDGPUSubtargetFeature (PR #226254)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,10 @@
+// RUN: llvm-mc -triple=amdgpu9.42 -show-encoding %s | FileCheck --check-prefix=SUPPORTED %s
+// RUN: llvm-mc -triple=amdgpu9.50 -show-encoding %s | FileCheck --check-prefix=SUPPORTED %s
+// RUN: llvm-mc -triple=amdgcn-amd-amdhsa -mcpu=gfx9-4-generic -show-encoding %s | FileCheck --check-prefix=SUPPORTED %s
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arsenm wrote:

```suggestion
// RUN: llvm-mc -triple=amdgpu9.4-amd-amdhsa -show-encoding %s | FileCheck --check-prefix=SUPPORTED %s
```

https://github.com/llvm/llvm-project/pull/226254