Re: [PATCH] Fix warnings building pdp11 port

[Trevor Saunders <tbsaunde@tbsaunde.org>]

On Tue, Sep 29, 2015 at 10:55:46AM -0600, Jeff Law wrote:
> The pdp11 port fails to build with the trunk because of a warning.
> Essentially VRP determines that the result of using BRANCH_COST is a
> constant with the range [0..1].  That's always less than 4, 3 and the
> various other magic constants used with BRANCH_COST and VRP issues a warning
> about that comparison.
> 
> I expect we're going to be overhauling BRANCH_COST shortly.  In the mean
> time, this just revectors BRANCH_COST for the pdp11 into a function to
> prevent VRP from collapsing the test and issuing the warning.
> 
> Yes, this means more code in the pdp11 cross compiler.  I'm not terribly
> concerned about that and I couldn't stand the idea of scattering diagnostic
> push/pop stuff all over the place to make just the pdp11 port happy.

ENOPATCH, but it seems like that's the right direction anyway since it
makes it slightly easier to convert the macro to a hook ;)

Trev

> 
> 
> Tested by building the pdp11 targets from config-all.mk.
> 
> Installed on the trunk.
> 
> Jeff