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Add a coercion optimiser, to reduce the size of coercion terms
author
simonpj@microsoft.com
<unknown>
Mon, 26 Oct 2009 09:47:56 +0000
(09:47 +0000)
committer
simonpj@microsoft.com
<unknown>
Mon, 26 Oct 2009 09:47:56 +0000
(09:47 +0000)
Coercion terms can get big (see Trac #2859 for example), so this
patch puts the infrastructure in place to optimise them:
* Adds Coercion.optCoercion :: Coercion -> Coercion
* Calls optCoercion in Simplify.lhs
The optimiser doesn't work right at the moment, so it is
commented out, but Tom is going to work on it.
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