patch to fix constant math

[Richard Sandiford]

Richard Sandiford <rdsandiford@googlemail.com> writes:
>>>> How is CONST_WIDE_INT variable size?
>>>
>>> It's just the usual trailing variable-length array thing.
>>
>> Good.  Do you get rid of CONST_DOUBLE (for integers) at the same time?
>
> Yeah.  I initially thought it might be OK to keep them and have
> CONST_INT, integer CONST_DOUBLEs and CONST_WIDE_INT alongside
> each other.  (The way the patch is structured means that the
> choice of whether to keep integer CONST_DOUBLEs can be changed
> very easily.)  But Kenny convinced me it was a bad idea.

Sorry to follow up on myself, but to clarify: I was talking about
converted targets here.  (As in, I originally thought even converted
targets could continue to use integer CONST_DOUBLEs.)

Unconverted targets continue to use CONST_DOUBLE.

Richard