[GHC] #9917: ddump-llvm runs opt/llc even when -fllvm isnt set

[GHC]

#9917: ddump-llvm runs opt/llc even when -fllvm isnt set
-------------------------------------+-------------------------------------
       Reporter:  carter             |                   Owner:
           Type:  bug                |                  Status:  new
       Priority:  normal             |               Milestone:
      Component:  Compiler           |                 Version:  7.8.3
       Keywords:                     |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Unknown            |         Type of failure:
     Blocked By:                     |  None/Unknown
Related Tickets:                     |               Test Case:
                                     |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
 to reproduce

 put
 {{{
 main= putStrLn "hello world"
 }}}
 in hello.hs
 and then invoke  `ghc hello.hs -O2 -v3 -fforce-recomp -ddump-llvm`

 then at some point you'll see something like

 {{{
 *** LLVM Optimiser:
 opt-3.4
 /var/folders/py/wgp_hj9d2rl3cx48yym_ynj00000gn/T/ghc88460_0/ghc88460_2.ll
 -o
 /var/folders/py/wgp_hj9d2rl3cx48yym_ynj00000gn/T/ghc88460_0/ghc88460_4.bc
 -O2 '--enable-tbaa=true'
 *** LLVM Compiler:
 llc-3.4 -O2 '-relocation-model=pic'
 /var/folders/py/wgp_hj9d2rl3cx48yym_ynj00000gn/T/ghc88460_0/ghc88460_4.bc
 -o
 /var/folders/py/wgp_hj9d2rl3cx48yym_ynj00000gn/T/ghc88460_0/ghc88460_5.lm_s
 '--enable-tbaa=true' '-mattr=+sse2'
 *** LLVM Mangler:

 }}}

 in the output

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9917>
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