[GHC] #9920: Segfault in arm binary with llvm 3.5

[GHC]

#9920: Segfault in arm binary with llvm 3.5
-------------------------------------+---------------------------------
        Reporter:  erikd             |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.10.2
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:  arm
 Type of failure:  Runtime crash     |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+---------------------------------
Changes (by erikd):

 * status:  closed => new
 * version:  7.11 => 7.10.1
 * resolution:  fixed =>
 * milestone:   => 7.10.2


Comment:

 Re-opening this because it affects the 7.10 branch when used with upstream
 llvm-3.5.0 (llvm-3.5.1 works correctly).

 Debian Testing and Unstable currently ship upstream llvm-3.5.0 with some
 patches as Debian version 1:3.5-10. This Debian version is is not capable
 to compiling GHC code to run on Arm. A bug has been raised against
 Debian's llvm-3.5 as https://bugs.debian.org/cgi-
 bin/bugreport.cgi?bug=782868 along with a request to roll a new version
 with the `arm-lower-tail-calls.patch` patch applied.

 I am also working on a configure time test to detect this problem in the
 `llc` command.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9920#comment:15>
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