patch: dwarf handling of values spanning > 1 register

[Zack Weinberg]

Aldy Hernandez <aldy@andrews.edu> writes:

> I do this because we also have to get the right size for DW_OP_piece,
> that we get from the mode of the regno.  So we need the mode, and the
> regno.  We could have an array of structures, of two arrays (one for
> mode and one for regno), but that's too much work, and a PARALLEL
> works peachily.

I'd much rather an array of structures than that you allocate
nontrivial amounts of RTL and throw them away immediately.

zw