./:	PR tree-optimization/31953
	* tree-vrp.c (set_value_range_to_value): Add equiv parameter.
	Change all callers.
	(set_value_range_to_null): Call set_value_range_to_value.
	(extract_range_from_comparison): Likewise.
testsuite/:
	PR tree-optimization/31953
	* gcc.c-torture/compile/pr31953.c: New test.

From-SVN: r124823