[llvm] [AMDGPU] Add verification for amdgcn.init.exec.from.input (PR #128172)

[Shilei Tian via llvm-commits]

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@@ -0,0 +1,27 @@
+; RUN: not llvm-as -disable-output 2>&1 %s | FileCheck %s
+
+; Function Attrs: convergent nocallback nofree nounwind willreturn
+declare void @llvm.amdgcn.init.exec.from.input(i32, i32 immarg) #0
+attributes #0 = { convergent nocallback nofree nounwind willreturn }
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shiltian wrote:

Does the attribute matter as well?

FWIW I'd prefer to keep the test as small as possible.

https://github.com/llvm/llvm-project/pull/128172