[clang] [clang] constexpr atomic builtins (__c11_atomic_OP and __atomic_OP) (PR #98756)

[Aaron Ballman via cfe-commits]

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In-Reply-To: <llvm.org/llvm/llvm-project/pull/98756 at github.com>


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@@ -389,6 +389,12 @@ def note_constexpr_assumption_failed : Note<
   "assumption evaluated to false">;
 def err_experimental_clang_interp_failed : Error<
   "the experimental clang interpreter failed to evaluate an expression">;
+def note_unaligned_atomic_pointer_op : Note<
+  "atomic pointer operation with argument %0 not aligned to size of pointee type (sizeof %1 is %2)">;
+def note_constexpr_atomic_ops_only_in_cpp : Note<
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AaronBallman wrote:

This note is not emitted anywhere, but also, I don't think a note's the correct way to go because that will fail at constant expression time but `__has_constexpr_builtin` will still return true.

https://github.com/llvm/llvm-project/pull/98756