https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118032
--- Comment #33 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Mark Wielaard <m...@gcc.gnu.org>: https://gcc.gnu.org/g:668cad04b16fc044142474232ac072fcc5f94433 commit r15-6598-g668cad04b16fc044142474232ac072fcc5f94433 Author: Mark Wielaard <m...@klomp.org> Date: Sun Jan 5 18:00:36 2025 +0100 tree-switch-conversion: don't apply switch size limit on jump tables commit 56946c801a7c ("gimple: Add limit after which slower switchlower algs are used [PR117091] [PR117352]") introduced a limit on the number of cases of a switch. It also bails out on finding jump tables if the switch is too large. This introduces a compile time regression during bootstrap. A riscv bootstrap takes hours longer. Particularly insn-attrtab.cc will take hours instead of minutes. Fix this by not applying the switch size limit on jump tables. An alternative would be to implement greedy switch clustering for jump tables as is done for switch bitmap clustering. gcc/ChangeLog: PR tree-optimization/118032 * tree-switch-conversion.cc (jump_table_cluster::find_jump_tables): Remove param_switch_lower_slow_alg_max_cases check.
