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Re: Scheduling and inserting NOPs
Am 21.11.2007 um 18:39 schrieb Andrew Haley:
Walk the instructions in each BB, and if you see a violation stuff
This is so simple that I'm wondering if there's something important
that I'm failing to understand.
Ah, hold on. Is it that you don't know where sched inserted the empty
cycles, and there's no easy way to find out?
To solve this someone simply stored cycle and insn (recorded in
TARGET_SCHED_REORDER) in a hash-table and reused this info in
TARGET_MACHINE_DEPENDENT_REORG. But I read that there passes which
might reorder or insert additional code. In that case the info in the
hash-table might be incorrect or not valid.