re PR tree-optimization/71488 (Wrong code for vector comparisons with ivybridge and westmere targets)

	PR tree-optimization/71488
	* gcc.target/i386/i386.exp (check_effective_target_sse4): Move to ...
	* lib/target-supports.exp: ... here.
	(check_sse4_hw_available): New procedure.
	(check_effective_target_sse4_runtime): Ditto.
	* g++.dg/pr71488.C (dg-additional-options): Use -msse4 instead of
	-march=westmere for sse4_runtime targets.
	* gcc.dg/vect/vect-bool-cmp.c: Include "tree-vect.h".
	(dg-additional-options): Use for sse4_runtime targets.
	(main): Call check_vect ().
	(dg-final): Perform scan only for sse4_runtime targets.

From-SVN: r237738