[clang] nonblocking/nonallocating attributes (was: nolock/noalloc) (PR #84983)

[Aaron Ballman via cfe-commits]

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@@ -0,0 +1,14 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -x c -std=c11 %s
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AaronBallman wrote:

```suggestion
// RUN: %clang_cc1 -fsyntax-only -verify -std=c89 %s
```

https://github.com/llvm/llvm-project/pull/84983