[GHC] #8960: SpecConstr usage explodes beyond 4GB with GHC 7.8.1 rc 2

[GHC]

#8960: SpecConstr usage explodes beyond 4GB with GHC 7.8.1 rc 2
---------------------------------------+-----------------------------------
        Reporter:  MichalGajda         |            Owner:
            Type:  bug                 |           Status:  new
        Priority:  normal              |        Milestone:  7.8.1
       Component:  Compiler            |          Version:  7.8.1-rc2
      Resolution:                      |         Keywords:
Operating System:  Unknown/Multiple    |     Architecture:
 Type of failure:  Compile-time crash  |  Unknown/Multiple
       Test Case:  cabal install hPDB  |       Difficulty:  Unknown
        Blocking:                      |       Blocked By:
                                       |  Related Tickets:  7068, 7898
---------------------------------------+-----------------------------------
Changes (by quantheory):

 * related:   => 7068, 7898


Comment:

 I guess SpecConstr seems to cause this sort of problem at times, so adding
 related bugs.

 I'm confused about -O2 vs. -O3, though. I thought that -O2 was the
 maximum, so -O3 and -O2 should be exactly the same?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8960#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler