nios2.c (nios2_simple_const_p): Returns false if the argument isn't a CONST_INT.

nios2.c (nios2_simple_const_p): Returns false if the argument isn't a CONST_INT.

2017-02-24  Segher Boessenkool  <segher@kernel.crashing.org>
	    Sandra Loosemore  <sandra@codesourcery.com>

	gcc/
	* config/nios2/nios2.c (nios2_simple_const_p): Returns false if the
	argument isn't a CONST_INT.
	(nios2_alternate_compare_const): Assert op is a CONST_INT.
	(nios2_valid_compare_const_p): Assert op is a CONST_INT.
	(nios2_validate_compare): Bypass alternate compare logic if *op2
	is not a CONST_INT.
	(ldstwm_operation_p): Return false if first_base is not a REG or
	if first_offset is not a CONST_INT.

Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>
From-SVN: r245724