[GHC] #13279: Check known-key lists
GHC
ghc-devs at haskell.org
Mon Feb 13 06:13:37 UTC 2017
#13279: Check known-key lists
-------------------------------------+-------------------------------------
Reporter: dfeuer | Owner: (none)
Type: bug | Status: new
Priority: normal | Milestone: 8.4.1
Component: Compiler | Version: 8.1
Keywords: | Operating System: Unknown/Multiple
Architecture: | Type of failure: Compile-time
Unknown/Multiple | performance bug
Test Case: | Blocked By:
Blocking: | Related Tickets:
Differential Rev(s): | Wiki Page:
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I noticed that `fmap` (for example) has a known key
{{{#!hs
fmapName = varQual gHC_BASE (fsLit "fmap") fmapClassOpKey
fmapClassOpKey = mkPreludeMiscIdUnique 173
}}}
but its `RdrName` doesn't refer to it.
{{{#!hs
fmap_RDR = varQual_RDR gHC_BASE (fsLit "fmap")
}}}
Is there a reason for this? If not, it seems likely that we could get a
bit of a speed-up by using `fmapName` here. We may also consider making
`liftA2` known-key for `Traversable` deriving.
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13279>
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