[Bug sanitizer/80404] UBSAN: compile time crash with "non-trivial conversion at assignment" error

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80404

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 12 18:08:29 2017
New Revision: 246881

URL: https://gcc.gnu.org/viewcvs?rev=246881&root=gcc&view=rev
Log:
        PR sanitizer/80403
        PR sanitizer/80404
        PR sanitizer/80405
        * fold-const.c (fold_ternary_loc): Use op1 instead of arg1 as argument
        to fold_build2_loc.  Convert TREE_OPERAND (tem, 0) to type.  Use
        op0 instead of fold_convert_loc (loc, type, arg0).

        * g++.dg/ubsan/pr80403.C: New test.
        * g++.dg/ubsan/pr80404.C: New test.
        * g++.dg/ubsan/pr80405.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/ubsan/pr80403.C
    trunk/gcc/testsuite/g++.dg/ubsan/pr80404.C
    trunk/gcc/testsuite/g++.dg/ubsan/pr80405.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog