r268179 - in /trunk/gcc: ChangeLog gimple-loop-...

[jakub@gcc.gnu.org]

Author: jakub
Date: Wed Jan 23 08:35:38 2019
New Revision: 268179

URL: https://gcc.gnu.org/viewcvs?rev=268179&root=gcc&view=rev
Log:
	PR tree-optimization/88964
	* gimple-loop-interchange.cc (loop_cand::analyze_induction_var): Use
	build_zero_cst instead of build_int_cst.  Return false for loop
	invariants which honor signed zeros.

	* gfortran.dg/pr88964.f90: New test.

Added:
    trunk/gcc/testsuite/gfortran.dg/pr88964.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-loop-interchange.cc
    trunk/gcc/testsuite/ChangeLog