PHI nodes undefined

[Paulo J. Matos]

Hello,

With my current pass moving things around and creating new BBs in some
test cases, I find that I get the error:
,----
| fnmatch.i: In function 'fnmatch':
| fnmatch.i:3: error: missing PHI def
| p_27 = PHI <(20)>
`----

Is there a way I can rebuild PHI nodes info or what's the best way to
keep track of this each time I change the CFG by adding/removing edges
and adding new basic blocks?

Cheers,

-- 
PMatos