[Bug sanitizer/89869] -fsanitize=undefined miscompilation

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89869

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 30 20:56:40 2019
New Revision: 270744

URL: https://gcc.gnu.org/viewcvs?rev=270744&root=gcc&view=rev
Log:
        Backported from mainline
        2019-03-29  Jakub Jelinek  <ja...@redhat.com>

        PR sanitizer/89869
        * typeck.c: Include gimplify.h.
        (cp_build_modify_expr) <case COND_EXPR>: Unshare rhs before using it
        for second time.  Formatting fixes.

        * g++.dg/ubsan/vptr-14.C: New test.

Added:
    branches/gcc-8-branch/gcc/testsuite/g++.dg/ubsan/vptr-14.C
Modified:
    branches/gcc-8-branch/gcc/cp/ChangeLog
    branches/gcc-8-branch/gcc/cp/typeck.c
    branches/gcc-8-branch/gcc/testsuite/ChangeLog