[Bug tree-optimization/69097] [6 Regression] wrong code at -O1 and above on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69097

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Jan  9 07:37:04 2016
New Revision: 232188

URL: https://gcc.gnu.org/viewcvs?rev=232188&root=gcc&view=rev
Log:
        PR middle-end/50865
        PR tree-optimization/69097
        * fold-const.h (expr_not_equal_to): New prototype.
        * fold-const.c: Include stringpool.h and tree-ssanames.h.
        (expr_not_equal_to): New function.
        * match.pd (X % -Y is the same as X % Y): Don't optimize
        unless X is known not to be equal to minimum or Y is known
        not to be equal to -1.
        * tree-vrp.c (simplify_div_or_mod_using_ranges): Add GSI argument.
        fold TRUNC_MOD_EXPR if the second argument is not a power of two.
        (simplify_stmt_using_ranges): Adjust caller.
        (vrp_finalize): Call set_value_range on SSA_NAMEs before calling
        substitute_and_fold.

        * gcc.c-torture/execute/pr50865.c: New test.
        * gcc.c-torture/execute/pr69097-1.c: New test.
        * gcc.c-torture/execute/pr69097-2.c: New test.
        * gcc.dg/pr69097-1.c: New test.
        * gcc.dg/pr69097-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr50865.c
    trunk/gcc/testsuite/gcc.c-torture/execute/pr69097-1.c
    trunk/gcc/testsuite/gcc.c-torture/execute/pr69097-2.c
    trunk/gcc/testsuite/gcc.dg/pr69097-1.c
    trunk/gcc/testsuite/gcc.dg/pr69097-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/fold-const.h
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c