#7374: rule not firing
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Reporter: igloo | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 7.8.1
Component: Compiler | Version: 7.6.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by simonpj):
The rule doesn't fire for the usual reason: `(==)` lacks a `NOINLINE [1]`
pragma (or suchlike) and as a result it inlines before the rule has a
chance to fire.
This is a bit of a problem with all library-defined operations, where it
hard to go back and add a `NOINLINE` pragma.
Would be be possible to use an intermediate function here, like this
{{{
(===) = (==)
{-# INLINE [1] (===) #-}
}}}
and now the rule can mention `(===)`?
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7374#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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