f6431f0c52
Support fastMath and other non-supported mathOp which only require float operands and call libdevice function directly to nvvm. 1. lowering mathOp with fastMath attribute to correct libdevice intrinsic. 2. some mathOp in math dialect has been lowered to libdevice now, but it doesn't cover all mathOp. so this mr lowers all the remaining mathOp which only require float operands.