Help : Instruction Scheduling

[James E Wilson]

Sachin Sonawane wrote:
>  But I want to see the Assembly code with no-ops. How do I go for it? 
> Which construct in .md file or any other file do I need to set for it?

We have no support for emitting padding nops.  You would have to modify 
the x86 backend to emit them, and this would be a non-trivial change. 
Try looking at the documentation for scheduler hooks, and try to figure 
out how to emit a padding nop if we need to increment the cycle count 
without scheduling any instructions.

An alternative would be to look at the scheduler dumps.  Try compiling 
with  -O2 -da -fsched-verbose=2 and look at the .sched2 dump.  It will 
list every instruction scheduled and an estimate of which cycle the 
compiler expects it to execute in.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com