[Bug tree-optimization/89518] missed optimisation for array address calculations

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89518

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri May  3 10:46:13 2019
New Revision: 270846

URL: https://gcc.gnu.org/viewcvs?rev=270846&root=gcc&view=rev
Log:
2019-05-03  Richard Biener  <rguent...@suse.de>

        PR middle-end/89518
        * match.pd: Add pattern to optimize (A / B) * B + (A % B) to A.

        * gcc.dg/pr89518.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr89518.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog