re PR middle-end/69156 (gcc.dg/pr59630.c: ICE: verify_gimple failed: non-trivial conversion at assignment with -fno-tree-ccp)

	PR tree-optimization/69156
	* gimple.c (validate_type): Removed.
	(gimple_builtin_call_types_compatible_p): Use
	useless_type_conversion_p instead of validate_type.
	* value-prof.c (gimple_stringop_fixed_value): Fold
	icall_size to correct type.

	* gcc.dg/pr69156.c: New test.

From-SVN: r232342