Hello, Since around trunk r135033, m68k has some scheduler attributes that are computed by C functions in m68k.c. Together with Richard Sandiford's improvements to genattrtab optimizations, the run time for genattrtab for m68k is >9 minutes on a fast machine (gcc110).
With the attached patch, genattrtab goes down to less than 2 minutes. But the only thing the patch does, is remove a write-only array, sched_branch_type! This array was apparently introduced to compute the best type-attribute for four branch instructions, with a FIXME that someone should implement the actual computations for the best type. However, exactly four years have passed since this code was added, and nobody has bothered to actually implement this better type attribute assignment.To me, it makes no sense to keep this code around, given the problems it creates for genattrtab. Tested by building a cross to m68k-linux. OK for trunk? Ciao! Steven
PR52391_no_sched_branch_type.diff
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