re PR middle-end/71734 (FAIL: libgomp.fortran/simd4.f90 -O3 -g execution test)

re PR middle-end/71734 (FAIL: libgomp.fortran/simd4.f90   -O3 -g  execution test)

gcc/

2016-07-28  Yuri Rumyantsev  <ysrumyan@gmail.com>

	PR tree-optimization/71734
	* tree-ssa-loop-im.c (ref_indep_loop_p_1): Pass value of safelen
	attribute instead of REF_LOOP and use it.
	(ref_indep_loop_p_2): Use SAFELEN argument instead of REF_LOOP and
	set it for Loops having non-zero safelen attribute.
	(ref_indep_loop_p): Pass zero as initial value for safelen.

gcc/testsuite/

2016-07-28  Yuri Rumyantsev  <ysrumyan@gmail.com>

	PR tree-optimization/71734
        * g++.dg/vect/pr70729-nest.cc: New test.

From-SVN: r238817