[Bug middle-end/81889] [7/8 Regression] bogus warnings with -Wmaybe-uninitialized -O3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81889

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Dec 12 08:50:31 2017
New Revision: 255573

URL: https://gcc.gnu.org/viewcvs?rev=255573&root=gcc&view=rev
Log:
2017-12-12  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/81889
        * tree-ssa-loop-niter.c (infer_loop_bounds_from_signedness): Use
        range info from the non-wrapping IV instead of just the range
        of the type.

        * gfortran.dg/pr81889.f90: New testcase.
        * gcc.dg/tree-ssa/pr64183.c: Adjust.

Added:
    trunk/gcc/testsuite/gfortran.dg/pr81889.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr64183.c
    trunk/gcc/tree-ssa-loop-niter.c