[clang] nolock/noalloc attributes (PR #84983)

[via cfe-commits]

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@@ -10778,6 +10778,101 @@ def warn_imp_cast_drops_unaligned : Warning<
   "implicit cast from type %0 to type %1 drops __unaligned qualifier">,
   InGroup<DiagGroup<"unaligned-qualifier-implicit-cast">>;
 
+def warn_func_effect_allocates : Warning<
+  "'%0' function '%1' must not allocate or deallocate memory">,
+  InGroup<FunctionEffects>;
+
+def note_func_effect_allocates : Note<
+  "'%1' cannot be inferred '%0' because it allocates/deallocates memory">;
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Sirraide wrote:

`%1` before `%0` seems odd to me; normally, we just specify these in order. Is there a reason you did it this way (same thing applies to the other notes below)?

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