[GHC] #13904: LLVM does not need to trash caller-saved registers.

[GHC]

#13904: LLVM does not need to trash caller-saved registers.
-------------------------------------+-------------------------------------
        Reporter:  kavon             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  llvm, codegen
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #4992, #4308      |  Differential Rev(s):  Phab:D5190
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * owner:  kavon => (none)
 * status:  closed => new
 * resolution:  fixed =>
 * milestone:  8.6.2 => 8.8.1


Comment:

 This was reverted in `ghc-8.6` due to regressions.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13904#comment:13>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler