Scheduling and inserting NOPs

[Andrew Haley]

Andrew Haley writes:
 > Boris Boesler writes:
 >  > Am 21.11.2007 um 18:07 schrieb Andrew Haley:
 >  > 
 >  > > Is there some special reason you can't do this in machine dependent
 >  > > reorg?  That seems like the obvious place.  Just walk every basic
 >  > > block stuffing NOPs.
 >  > 
 >  >   The problem isn't where, it's how. The insn-list after scheduling  
 >  > doesn't provide any information about cycles or delays, does it? How  
 >  > do I find out before which insn I have to insert a NOP, if the  
 >  > scheduler doesn't pass any info to me?
 > 
 > Walk the instructions in each BB, and if you see a violation stuff a NOP.
 > 
 > 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?

Andrew.

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