[Bug target/54589] struct offset add should be folded into address calculation

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54589

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec  1 07:27:58 2018
New Revision: 266707

URL: https://gcc.gnu.org/viewcvs?rev=266707&root=gcc&view=rev
Log:
        PR target/54589
        * combine.c (find_split_point): For invalid memory address
        nonobj + obj + const, if reg + obj + const is valid addressing
        mode, split at nonobj.  Use if rather than else if for the
        fallback.  Comment fixes.

        * gcc.target/i386/pr54589.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr54589.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog