[GHC] #13535: vector test suite uses excessive memory on GHC 8.2

GHC ghc-devs at haskell.org
Tue Apr 18 20:11:16 UTC 2017


#13535: vector test suite uses excessive memory on GHC 8.2
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #10800            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Please excuse the nonsense in comment:13. My `trace` mislead me into
 believing that the bindings in question were join points when they were
 not (and now that I look again at this, I don't believe that such top-
 level join points could even arise).

 The problem is instead that the `not (isAlwaysActive (idInlineActivation
 id))` condition in `noCSE` fires for the bindings in question. This
 appears to be due to the `INLINE[0]` applied to these bindings by
 worker/wrapper.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13535#comment:14>
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