[Bug target/93002] while(i--) optimization

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93002

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 20 08:22:46 2019
New Revision: 279632

URL: https://gcc.gnu.org/viewcvs?rev=279632&root=gcc&view=rev
Log:
        PR target/93002
        * config/i386/i386.md (dec reg; cmp $-1, reg; jne lab): New
        define_peephole2.

        * gcc.target/i386/pr93002.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr93002.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.md
    trunk/gcc/testsuite/ChangeLog