[buildrobot] pdp11-aout

[Joern Rennecke]

On 26 November 2013 15:55, Paul Koning <paulkoning@comcast.net> wrote:

> Is there a requirement that all targets must have branch cost that it, at least some of the time, 4 or greater?

Not by design, although there seem to be a number of issues with
supporting targets with a lower branch cost.  E.g. consider
LOGICAL_OP_NON_SHORT_CIRCUIT - the default of which also seems to
assume superscalarity and a cheap flag-set operation - and its impact
on/treatment by the test suite.

>  If so, why?  If not, then I suppose cfgexpand.c could be changed to defeat this message

I agree.

, but how, or why?

Changing this target macro into a target hook should do the trick.