[clang] [Clang] Diagnose conflict between always_inline/noinline attributes (PR #215173)

[Erich Keane via cfe-commits]

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@@ -0,0 +1,37 @@
+// RUN: %clang_cc1 %s -std=c++17 -fsyntax-only -verify
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erichkeane wrote:

I would expect us to be able to do this in an existing test.  Can you look around and find a better place for this? 

https://github.com/llvm/llvm-project/pull/215173