https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94485
--- Comment #3 from Dimitri Gorokhovik <dimitri.gorokhovik at free dot fr> ---
(In reply to Andrew Pinski from comment #2)
> Also c++20 changes constexpr is handled which is why inline asm is accepted
> now IIRC.
This code:
constexpr auto f()
{
asm("before:");
constexpr auto r = 129;
asm("after:");
return r;
};
produces:
bug-2.cpp: In function ‘constexpr auto f()’:
bug-2.cpp:3:3: error: inline assembly is not a constant expression
3 | asm("before:");
| ^~~
bug-2.cpp:3:3: note: only unevaluated inline assembly is allowed in a
‘constexpr’ function in C++2a
