Uros Bizjak <ubiz...@gmail.com> writes: > The solution is, to transform operands of PLUS and MINUS RTX in the > form of (subreg:M (op:N A C) 0) to (op:M (subreg:N (A 0)) C), as is > done for standalone subreg operation in 32bit case.
I agree (subreg:M (op:N A C) 0) to (op:M (subreg:N (A 0)) C) is a good transformation, but why do we need to handle as special the case where the subreg is itself the operand of a plus or minus? I think it should happen regardless of where the subreg occurs. On the face of it, this feels like something that could legimately go in simplify_subreg. Richard
