fold-const.c (operand_equal_p): Consider two calls to "const" functions with identical non-volatile arguments...


	* fold-const.c (operand_equal_p): Consider two calls to "const"
	functions with identical non-volatile arguments to be equal.
	Consider the FUNCTION_DECL for the "__builtin_foo" form of a
	built-in function to be equal to the "foo" form.

Co-Authored-By: Jeff Law <law@redhat.com>

From-SVN: r68011