[GHC] #12736: Calling a complex Haskell function (obtained via FFI wrapper function) from MSVC 64-bit C code (passed in as FunPtr) can leave SSE2 registers in the XMM6-XMM15 range modified

[GHC]

#12736: Calling a complex Haskell function (obtained via FFI wrapper function) from
MSVC 64-bit C code (passed in as FunPtr) can leave SSE2 registers in the
XMM6-XMM15 range modified
-------------------------------------+-------------------------------------
        Reporter:  bavism            |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler (FFI)    |              Version:  7.10.3
      Resolution:  fixed             |             Keywords:
                                     |  ffi,registers,sse2,clobber,xmm
Operating System:  Windows           |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  Incorrect result  |            Test Case:
  at runtime                         |  https://github.com/bavis-m/raycast
      Blocked By:                    |             Blocking:
 Related Tickets:  #14619            |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by AndreasK):

 * status:  new => closed
 * resolution:   => fixed
 * related:   => #14619


Comment:

 Fixed with #14619.

 GHC did not respect callee saved XMM registers on windows. Leading to them
 being clobbered.

 I do not have VS2015 to confirm the repro case is fixed. But it's exactly
 what I would expect to happen without the fix so I'm closing this as
 fixed.

 Feel free to reopen if the issue persists.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12736#comment:4>
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