If the LHS does not contain zero, neither do multiply operands.

If the LHS does not contain zero, neither do multiply operands.

Given ~[0,0] = op1 * op2, range-ops should determine that neither op1 nor
op2 is zero.  Add this to the operator_mult for op1_range.  op2_range
simply invokes op1_range, so both will be covered.

	PR tree-optimzation/110992.c
	PR tree-optimzation/119471.c
	gcc/
	* range-op.cc (operator_mult::op1_range): If the LHS does not
	contain zero, return non-zero.

	gcc/testsuite/
	* gcc.dg/pr110992.c: New.
	* gcc.dg/pr119471.c: New.