[Bug sanitizer/80875] [7/8 Regression] UBSAN: compile time crash in fold_binary_loc at fold-const.c:9817

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80875

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri May 26 09:31:36 2017
New Revision: 248485

URL: https://gcc.gnu.org/viewcvs?rev=248485&root=gcc&view=rev
Log:
        PR sanitizer/80875
        * fold-const.c (fold_binary_loc) <case MULT_EXPR>: Check if OP1
        can be negated.

        * c-c++-common/ubsan/pr80875.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/ubsan/pr80875.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog