https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113907
--- Comment #79 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Martin Jambor <jamb...@gcc.gnu.org>: https://gcc.gnu.org/g:72f6b7ec3915f0b5b3517dffa19e3b34c8af687d commit r12-10475-g72f6b7ec3915f0b5b3517dffa19e3b34c8af687d Author: Martin Jambor <mjam...@suse.cz> Date: Tue May 28 13:33:02 2024 +0200 ipa: Compare jump functions in ICF (PR 113907) This is a manual backport of r14-9840-g1162861439fd3c from master. Manual because the bits and value range representation in jump functions have changes during the gcc 14 development cycle. In PR 113907 comment #58, Honza found a case where ICF thinks bodies of functions are equivalent but becaise of difference in aliases in a memory access, different aggregate jump functions are associated with supposedly equivalent call statements. This patch adds a way to compare jump functions and plugs it into ICF to avoid the issue. gcc/ChangeLog: 2024-05-14 Martin Jambor <mjam...@suse.cz> PR ipa/113907 * ipa-prop.h (ipa_jump_functions_equivalent_p): Declare. (values_equal_for_ipcp_p): Likewise. * ipa-prop.cc (ipa_agg_pass_through_jf_equivalent_p): New function. (ipa_agg_jump_functions_equivalent_p): Likewise. (ipa_jump_functions_equivalent_p): Likewise. * ipa-cp.cc (values_equal_for_ipcp_p): Make function public. * ipa-icf-gimple.cc: Include alloc-pool.h, symbol-summary.h, sreal.h, ipa-cp.h and ipa-prop.h. (func_checker::compare_gimple_call): Comapre jump functions. gcc/testsuite/ChangeLog: 2024-05-10 Martin Jambor <mjam...@suse.cz> PR ipa/113907 * gcc.dg/lto/pr113907_0.c: New. * gcc.dg/lto/pr113907_1.c: Likewise. * gcc.dg/lto/pr113907_2.c: Likewise. (cherry picked from commit 1db45e83021a8a87f41e22053910fcce6e8e2c2c)
