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A lot of ports can use this code. But the code is used only for priority coloring which is not default for most ports. The code itself could result in better priority coloring.Ian, thanks for reporting this. I'll investigate this more. It
affects only ports using priority allocation (I know only one which
is m32c). DJ just recently reported a reload failure problem on
m32c. Probably that is because of this wrong code.
In checking through this code, I see that it depends on having define_constraint's in the *.md file. m32c has none, so this code is not triggered. Has any port ever used this code?
Would the lack of
define_constraints be causing problems for the m32c backend?
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