[GHC] #14452: `-optc-O3` getting shadowed by automatically injected -O flags

[GHC]

#14452: `-optc-O3` getting shadowed by automatically injected -O flags
-------------------------------------+-------------------------------------
        Reporter:  hvr               |                Owner:  RolandSenn
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:  make test
                                     |  TEST=T14452
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5318
       Wiki Page:                    |  Phab:D5398
-------------------------------------+-------------------------------------
Changes (by RolandSenn):

 * status:  new => patch
 * differential:  Phab:D5318 => Phab:D5318 Phab:D5398


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14452#comment:8>
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