https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67325
--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by hongtao Liu <liuho...@gcc.gnu.org>: https://gcc.gnu.org/g:1d6199e5f8c1c08083eeb0279f71333234fe14ad commit r15-882-g1d6199e5f8c1c08083eeb0279f71333234fe14ad Author: liuhongt <hongtao....@intel.com> Date: Mon Feb 19 13:57:24 2024 +0800 Reduce cost of MEM (A + imm). For MEM, rtx_cost iterates each subrtx, and adds up the costs, so for MEM (reg) and MEM (reg + 4), the former costs 5, the latter costs 9, it is not accurate for x86. Ideally address_cost should be used, but it reduce cost too much. So current solution is make constant disp as cheap as possible. gcc/ChangeLog: PR target/67325 * config/i386/i386.cc (ix86_rtx_costs): Reduce cost of MEM (A + imm) to "cost of MEM (A)" + 1. gcc/testsuite/ChangeLog: * gcc.target/i386/pr67325.c: New test.
