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

[GHC]

#9125: int-to-float conversion broken on ARM
-------------------------------------+-------------------------------------
        Reporter:  Ansible           |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  high              |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.8.3
  (CodeGen)                          |
      Resolution:  invalid           |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  arm
 Type of failure:  Incorrect result  |            Test Case:
  at runtime                         |
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"90fae01c326bf8b0802b4e8968f84886be4e1380/ghc"
 90fae01c/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="90fae01c326bf8b0802b4e8968f84886be4e1380"
 Fix LLVM TBAA metadata

 Accesses through a Cmm local are currently reported as having the
 "other" type, which can only alias other "other" accesses.  However,
 this assumption is incorrect, which can result in silent bad LLVM
 codegen.

 Fixes #9308.
 Fixes #9504.

 Test Plan: GHC CI

 Reviewers: rwbarton, austin, bgamari

 Reviewed By: bgamari

 Subscribers: michalt, thomie

 Differential Revision: https://phabricator.haskell.org/D2758

 GHC Trac Issues: #9125, #9308, #9504
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9125#comment:47>
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