Wed Jan 23 05:40:12 PST 2008 [EMAIL PROTECTED]
* Attach the INLINE Activation pragma to any automatically-generated
specialisations
Another idea suggested by Roman, happily involving a one-line change. Here's
the new Note in Specialise:
Note [Auto-specialisation and RULES]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Consider:
g :: Num a => a -> a
g = ...
f :: (Int -> Int) -> Int
f w = ...
{-# RULE f g = 0 #-}
Suppose that auto-specialisation makes a specialised version of
g::Int->Int That version won't appear in the LHS of the RULE for f.
So if the specialisation rule fires too early, the rule for f may
never fire.
It might be possible to add new rules, to "complete" the rewrite system.
Thus when adding
RULE forall d. g Int d = g_spec
also add
RULE f g_spec = 0
But that's a bit complicated. For now we ask the programmer's help,
by *copying the INLINE activation pragma* to the auto-specialised rule.
So if g says {-# NOINLINE[2] g #-}, then the auto-spec rule will also
not be active until phase 2.
M ./compiler/specialise/Specialise.lhs -1 +29
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