patch applied (ghc): Fix constructor-specialisation bug
Simon Peyton Jones
simonpj at microsoft.com
Thu May 4 07:55:40 EDT 2006
Thu May 4 04:21:31 PDT 2006 simonpj at microsoft.com
* Fix constructor-specialisation bug
The constructor-specialisation optimisation was not dealing with the case
(letrec ... in f) a1 a2
We need to apply constructor specialisation in the letrec; previously
we were leaving it untouched on the grounds that the function part of
an application is almost always a variable.
But in fact, float-in immediately precedes SpecConstr, so we can get
these odd-looking applications.
M ./compiler/specialise/SpecConstr.lhs -12 +17
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