Question about 4.5.x register allocation

Ian Lance Taylor
Wed Sep 1 23:09:00 GMT 2010

William Mahoney <> writes:

> I have moved the pass so that it is immediately after pass_ira - no 
> difference, I still see register 75 (and 74). Also, df.c doesn't appear to 
> be in my source - I assume it is now df-core.c which does have quite the 
> documentation and I will take a look. Are you basically saying that after 
> the hard assignments the live sets are not necessarily valid any more? 
> That would be .. oh, the word that comes to mind is "bad"!

As far as I know the live sets should be valid provided you call
df_live_add_problem and df_analyze.


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