Cleanup prange sanity checks.

Cleanup prange sanity checks.

The pointers_handled_p() code was a temporary sanity check, and not
even a good one, since we have a cleaner way of checking type
mismatches with operand_check_p.  This patch removes all the code, and
adds an explicit type check for relational operators, which are the
main problem in PR114985.

Adding this check makes it clear where the type mismatch is happening
in IPA, even without prange.  I've added code to skip the range
folding if the types don't match what the operator expects.  In order
to reproduce the latent bug, just remove the operand_check_p calls.

Tested on x86-64 and ppc64le with and without prange support.

gcc/ChangeLog:

	PR tree-optimization/114985
	* gimple-range-op.cc: Remove pointers_handled_p.
	* ipa-cp.cc (ipa_value_range_from_jfunc): Skip range folding if
	operands don't match.
	(propagate_vr_across_jump_function): Same.
	* range-op-mixed.h: Remove pointers_handled_p and tweak
	operand_check_p.
	* range-op-ptr.cc (range_operator::pointers_handled_p): Remove.
	(pointer_plus_operator::pointers_handled_p): Remove.
	(class operator_pointer_diff): Remove pointers_handled_p.
	(operator_pointer_diff::pointers_handled_p): Remove.
	(operator_identity::pointers_handled_p): Remove.
	(operator_cst::pointers_handled_p): Remove.
	(operator_cast::pointers_handled_p): Remove.
	(operator_min::pointers_handled_p): Remove.
	(operator_max::pointers_handled_p): Remove.
	(operator_addr_expr::pointers_handled_p): Remove.
	(operator_bitwise_and::pointers_handled_p): Remove.
	(operator_bitwise_or::pointers_handled_p): Remove.
	(operator_equal::pointers_handled_p): Remove.
	(operator_not_equal::pointers_handled_p): Remove.
	(operator_lt::pointers_handled_p): Remove.
	(operator_le::pointers_handled_p): Remove.
	(operator_gt::pointers_handled_p): Remove.
	(operator_ge::pointers_handled_p): Remove.
	* range-op.cc (TRAP_ON_UNHANDLED_POINTER_OPERATORS): Remove.
	(range_op_handler::lhs_op1_relation): Remove pointers_handled_p checks.
	(range_op_handler::lhs_op2_relation): Same.
	(range_op_handler::op1_op2_relation): Same.
	* range-op.h: Remove RO_* declarations.