[GHC] #10926: wrong signature of atomic builtins

[GHC]

#10926: wrong signature of atomic builtins
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        Reporter:  schwab               |                Owner:
            Type:  bug                  |               Status:  patch
        Priority:  normal               |            Milestone:
       Component:  Compiler             |              Version:  7.10.2
      Resolution:                       |             Keywords:
Operating System:  Linux                |         Architecture:  aarch64
 Type of failure:  Building GHC failed  |            Test Case:
      Blocked By:                       |             Blocking:
 Related Tickets:                       |  Differential Rev(s):  Phab:D1300
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"e3d2bab86fc89113f8ee65800fdfac81d8d54851/ghc"
 e3d2bab8/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="e3d2bab86fc89113f8ee65800fdfac81d8d54851"
 Fix signature of atomic builtins

 This patch is due to Andreas Schwab.

 This fixes #10926, which reports (on AArch64) errors of the form,

 ```
 /tmp/ghc1492_0/ghc_1.hc:2844:25: warning: passing argument 1 of
 'hs_atomic_xor64' makes pointer from integer without a cast
 [-Wint-conversion]
      _c1Ho = hs_atomic_xor64((*Sp) + (((Sp[1]) << 0x3UL) + 0x10UL),
 Sp[2]);
                              ^

 In file included from
 /home/abuild/rpmbuild/BUILD/ghc-7.10.2/includes/Stg.h:273:0: 0,
                  from /tmp/ghc1492_0/ghc_1.hc:3:

 /home/abuild/rpmbuild/BUILD/ghc-7.10.2/includes/stg/Prim.h:41:11:
      note: expected 'volatile StgWord64 *
            {aka volatile long unsigned int *}'
            but argument is of type 'long unsigned int'
      StgWord64 hs_atomic_xor64(volatile StgWord64 *x, StgWord64 val);
                ^
 ```

 Test Plan: Validate

 Reviewers: austin, simonmar

 Reviewed By: simonmar

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D1300

 GHC Trac Issues: #10926
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10926#comment:3>
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