[Bug target/77826] [7 Regression] ICE in decompose, at wide-int.h:928 w/ -m64 -O2 and above

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77826

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct  5 11:38:59 2016
New Revision: 240776

URL: https://gcc.gnu.org/viewcvs?rev=240776&root=gcc&view=rev
Log:
2016-10-05  Richard Biener  <rguenther@suse.de>

        PR middle-end/77826
        * genmatch.c (dt_operand::gen_match_op): Amend operand_equal_p
        with types_match for GIMPLE code gen to handle type mismatched
        constants properly.
        (dt_operand::gen): Adjust.
        * match.pd ((X /[ex] A) * A -> X): Properly handle converted
        and constant A.

        * gcc.dg/torture/pr77826.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr77826.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/genmatch.c
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog