[GHC] #16258: PowerPC Big-Endian: ArithInt16, ArithInt8, ArithWord16, and ArithWord8 fail

[GHC]

#16258: PowerPC Big-Endian: ArithInt16, ArithInt8, ArithWord16, and ArithWord8 fail
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        Reporter:  trommler          |                Owner:  trommler
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.10.1
       Component:  Compiler          |              Version:  8.7
      Resolution:                    |             Keywords:  Big-endian
Operating System:  Unknown/Multiple  |         Architecture:  powerpc64
 Type of failure:  Incorrect result  |            Test Case:
  at runtime                         |  primops/should_run/ArithInt16,
                                     |  primops/should_run/ArithWord16,
                                     |  primops/should_run/ArithWord8,
                                     |  primops/should_run/ArithInt8
      Blocked By:                    |             Blocking:
 Related Tickets:  #16222            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by trommler):

 In Cmm I find the following 16 bit store to the stack:
 {{{
            R1 = _s1MY::P64;   // CmmAssign
            I64[Sp] = stg_ap_n_info;   // CmmStore
            I16[Sp + 8] = _s1N6::I16;   // CmmStore
            call stg_ap_n_fast(R2, R1) args: 24, res: 8, upd: 8;   //
 CmmCall
 }}}

 This is most likely wrong, it should probably  be a 64 bit store.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16258#comment:3>
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