[GHC] #8971: Native Code Generator for 7.8 is not as optimized as 7.6.3...

[GHC]

#8971: Native Code Generator for 7.8 is not as optimized as 7.6.3...
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        Reporter:  GordonBGood              |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:  7.10.1
       Component:  Compiler (NCG)           |          Version:  7.8.1-rc2
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  Runtime performance bug  |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by GordonBGood):

 Replying to [comment:17 simonmar]:
 > The short version is that this isn't going to be easy to fix, and I
 recommend using LLVM.

 In fact, I prefer LLVM because it is more consistent for timing, but of
 course that brings us to that other bug for 64-bit Windows where 64-bit
 GHC 7.8.2 still doesn't work with LLVM (3.4/3.5) at least for mingw as per
 the distrubuted binary, although it does under 64-bit Linux.  The above
 test program runs under LLVM for a 32-bit compile but crashes on run for
 64-bit, both on Windows.

 Or perhaps there is something wrong with my compile of 64-bit LLVM even
 though I followed the exact same procedure as generating the 32-bit
 version from trunk.  Don Stewart's entry that working LLVM should really
 be distributed with GHC is a very good one.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8971#comment:19>
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