[llvm] Attributor: Infer noalias.addrspace metadata for memory instructions (PR #136553)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,597 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -passes=amdgpu-attributor %s | FileCheck %s
+
+ at gptr = protected addrspace(1) externally_initialized global i32 0, align 4
+ at gptr2 = protected addrspace(4) externally_initialized global i32 0, align 4
+ at gptr3 = protected addrspace(3) externally_initialized global i32 0, align 4
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arsenm wrote:

```suggestion
@gptr = addrspace(1) externally_initialized global i32 0, align 4
@gptr2 = addrspace(4) externally_initialized global i32 0, align 4
@gptr3 = addrspace(3) externally_initialized global i32 0, align 4 
```

https://github.com/llvm/llvm-project/pull/136553