[C++] Mixed scalar-vector operations

[Jason Merrill]

On 10/05/2012 07:09 PM, Marc Glisse wrote:
> [LR]SHIFT_EXPR are special and also accept to have a vector as first
> argument and a scalar as second argument (but not the reverse).

Fair enough.

> These 2 lines are in a switch in the case where scalar_to_vector
> returned stv_firstarg, meaning that the first arg (op0) is a scalar that
> needs to be converted to a vector of the same type as op1.

Ah, I see.  I just wasn't reading closely enough.

> I think I should at least change the comment on scalar_to_vector from:
>
> /* Convert scalar to vector for the range of operations.  */
>
> to something like:
>
> /* Determine which of the operands, if any, is a scalar that needs to be
>     converted to a vector for the range of operations.  */

> And add something in scalar_to_vector about the SHIFT_EXPRs.

Makes sense.

Jason