#96 sloc variables in xdata when --model-large

[Josef Pavlik]

hi all
some more complicated function uses temporary variables sloc0, sloc1 etc. These variables are always allocated in the data segment. This segment is filled up very early. The only countermeasure is using --auto-stack option.

It's possible to add an option to make all sloc variables in xdata (or make it by default in large model)?

thanx

Jet

[Frieder Ferlemann]

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Hi, I'd like to add to this: have an option which limits the
number of slocs in data segment to a user-specifiable number
of bytes per function. This would allow a relatively fine
adjustment between code-size and data-segment usage.

This limit could also be of use in the small model. If the
limit was exceeded then SDCC would start to assign slocs
within xdata memory. (If the default would be unlimited this
would correspond to SDCC's present scheme.)

[Josef Pavlik]

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Another idea - make an pragma that specify this value for every single
function. User would make critical function's slocs in the data segment and
leave another non critical parts in the xdata as specified by an global option.