https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14840
--- Comment #16 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Andrew Pinski <pins...@gcc.gnu.org>: https://gcc.gnu.org/g:5c021f17e7d09a0eae2d6fb875c9a5484bd4e043 commit r13-4170-g5c021f17e7d09a0eae2d6fb875c9a5484bd4e043 Author: Andrew Pinski <apin...@marvell.com> Date: Fri Nov 18 05:05:03 2022 +0000 constexprify some tree variables Since we use C++11 by default now, we can use constexpr for some const decls in tree-core.h. This patch does that and it allows for better optimizations of GCC code with checking enabled and without LTO. For an example generic-match.cc compiling is speed up due to the less number of basic blocks and less debugging info produced. I did not check the speed of compiling the same source but rather the speed of compiling the old vs new sources here (but with the same compiler base). The small slow down in the parsing of the arrays in each TU is migrated by a speed up in how much code/debugging info is produced in the end. Note I looked at generic-match.cc since it is one of the compiling sources which causes parallel building to stall and I wanted to speed it up. OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions. gcc/ChangeLog: PR middle-end/14840 * tree-core.h (tree_code_type): Constexprify by including all-tree.def. (tree_code_length): Likewise. * tree.cc (tree_code_type): Remove. (tree_code_length): Remove.
