[Bug middle-end/52478] -ftrapv calls the wrong functions in libgcc

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52478

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Jul 28 08:47:38 2014
New Revision: 213117

URL: https://gcc.gnu.org/viewcvs?rev=213117&root=gcc&view=rev
Log:
2014-07-28  Richard Biener  <rguent...@suse.de>

    PR middle-end/52478
    * optabs.c (gen_int_libfunc): For -ftrapv libfuncs make
    sure to register SImode ones, not only >= word_mode ones.
    * expr.c (expand_expr_real_2): When expanding -ftrapv
    binops do not use OPTAB_LIB_WIDEN.

    * gcc.dg/torture/ftrapv-1.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/ftrapv-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expr.c
    trunk/gcc/optabs.c
    trunk/gcc/testsuite/ChangeLog