[GHC] #9430: implement more arithmetic operations natively in the LLVM backend

[GHC]

#9430: implement more arithmetic operations natively in the LLVM backend
-------------------------------------+-------------------------------------
        Reporter:  rwbarton          |                   Owner:  michalt
            Type:  feature request   |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler (LLVM)   |                 Version:  7.9
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime           |               Test Case:
  performance bug                    |  primops/should_run/T9430
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"92f5385d8b2be50848a2496199a481f299f4b53a/ghc" 92f5385/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="92f5385d8b2be50848a2496199a481f299f4b53a"
 Support MO_U_QuotRem2 in LLVM backend

 This adds support for MO_U_QuotRem2 in LLVM backend.  Similarly to
 MO_U_Mul2 we use the standard LLVM instructions (in this case 'udiv'
 and 'urem') but do the computation on double the word width (e.g., for
 64-bit we will do them on 128 registers).

 Test Plan: validate

 Reviewers: rwbarton, austin, bgamari

 Reviewed By: bgamari

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D1100

 GHC Trac Issues: #9430
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9430#comment:13>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler