[gcc r16-610] Add std::to_underlying to the set of stdlib functions that are always folded

https://gcc.gnu.org/g:3ecca8f3ad7e7fe3da0e600fb66fca3dc6bae006 commit r16-610-g3ecca8f3ad7e7fe3da0e600fb66fca3dc6bae006 Author: Ville Voutilainen Date: Mon May 12 23:16:46 2025 +0300 Add std::to_underlying to the set of stdlib functions that are always folded gcc/cp/ChangeLog:

[gcc r16-621] Remove a sanity check comment now that the sanity check has been removed

https://gcc.gnu.org/g:871099ae65a4f528496c7550331364866f9806bb commit r16-621-g871099ae65a4f528496c7550331364866f9806bb Author: Ville Voutilainen Date: Wed May 14 16:39:09 2025 +0300 Remove a sanity check comment now that the sanity check has been removed gcc/cp/ChangeLog:

[gcc r16-695] Further simplify the stdlib inline folding

https://gcc.gnu.org/g:fa365450352ae5cc7c0078e37e641341fb48e6b6 commit r16-695-gfa365450352ae5cc7c0078e37e641341fb48e6b6 Author: Ville Voutilainen Date: Thu May 15 16:26:52 2025 +0300 Further simplify the stdlib inline folding gcc/cp/ChangeLog: * cp-gimplify.cc (cp_fold