[GHC] #9125: int-to-float conversion broken on ARM

[GHC]

#9125: int-to-float conversion broken on ARM
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              Reporter:  Ansible     |            Owner:
                  Type:  bug         |           Status:  infoneeded
              Priority:  highest     |        Milestone:  7.8.4
             Component:  Compiler    |          Version:  7.8.3
  (CodeGen)                          |         Keywords:
            Resolution:              |     Architecture:  arm
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  Incorrect   |  Related Tickets:
  result at runtime                  |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by rwbarton):

 Replying to [comment:24 amurrayc]:
 > The patch didn't do anything (although I only applied it and re-`make &&
 make install`-ed it. Should I have done a full `make clean && configure
 ...`?)

 You don't need to rerun `configure`, but yeah you will need to rebuild the
 stage1 compiler so that it can rebuild the RTS correctly, and `make clean`
 is the easiest way.

 > However, LLVM 3.4 seems to work.  It at least produces
 > {{{
 > 29.0
 > }}}
 > when fed
 > {{{
 > main = print (29.0 :: Float)
 > }}}

 Well that's good to know, at least! I still think our TBAA information is
 wrong for this code, though.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9125#comment:25>
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