[clang] [llvm] AMDGPU: Add builtin/intrinsic global_(load|store)_b128 (PR #172090)

[Matt Arsenault via cfe-commits]

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@@ -0,0 +1,66 @@
+; RUN: not llvm-as < %s 2>&1 | FileCheck %s
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arsenm wrote:

```suggestion
; RUN: not llvm-as -disable-output < %s 2>&1 | FileCheck %s
```

https://github.com/llvm/llvm-project/pull/172090