[Bug rtl-optimization/114452] Functions invoked through compile-time table of function pointers not inlined

[xry111 at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114452

--- Comment #3 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
(In reply to Paweł Bylica from comment #2)
> I don't think this is related to lambdas. The following is also not
> optimized:
> 
> 
> using F = int (*)(int) noexcept;
> 
> inline int impl(int x) noexcept { return x; }
> 
> void test(int z[2]) noexcept {
>     static constexpr F fs[]{
>         impl,
>         impl,
>     };
> 
>     for (int i = 0; i < 2; ++i) {
>         z[i] = fs[i](z[i]);
>     }
> }
> 
> https://godbolt.org/z/9hPbzo4Px

The analysis of PR111573 says:

"So we fail to inline since ipa-prop fails to track the constant function
address.  I think this is really common in typical lambda function usage"

"fails to track the constant function address" applies for normal functions
too.