Scheduling and inserting NOPs

[Andrew Haley]

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.

Andrew.

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