[GHC] #13999: Simple function not inlined within declaration marked NOINLINE

GHC ghc-devs at haskell.org
Thu Jul 20 01:05:15 UTC 2017


#13999: Simple function not inlined within declaration marked NOINLINE
-------------------------------------+-------------------------------------
           Reporter:  srb            |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  lowest         |         Milestone:
          Component:  Compiler       |           Version:  8.0.2
           Keywords:  Inlining       |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Runtime
  Unknown/Multiple                   |  performance bug
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 This seems so shallow that I feel like I must be missing something, but if
 I implement a function like

 {{{#!hs
 eq :: Bool -> Bool -> Bool
 eq x y = x == y
 {-# NOINLINE eq #-}
 }}}

 the boolean equality operator is not inlined in eq, even at -O2. The
 generated core is instead

 {{{#!hs
 eq = $fEqBool_$c==
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13999>
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