re PR libgomp/84086 ([8 Regresssion] segfault in instantiate_scev_r for libgomp.fortran/examples-4/simd-2.f90 -O1)

2018-01-29  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/84086
	* tree-ssanames.c: Include cfgloop.h and tree-scalar-evolution.h.
	(flush_ssaname_freelist): When SSA names were released reset
	the SCEV hash table.

From-SVN: r257152