https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104800
uecker at gcc dot gnu.org changed:
What |Removed |Added
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See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=119060
--- Comment #24 from uecker at gcc dot gnu.org ---
For C++ a builtin was added that acts as a barrier for std::observable. This
could potentially be emitted by the C frontend after each volatile access.
https://gcc.gnu.org/cgit/gcc/commit/?id=9056b5faa87df59fb8eb2f92096a8e6e7d246757
I do not understand the test case though, as the addition is not volatile, so
it may have stronger semantics than what is needed here.
(IIRC, in C the function without return would also not have UB as long as the
return value is not used.).
