r255573 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.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  <rguenther@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