[GHC] #9387: LLVM backend: redundant code for functions calling themselves

[GHC]

#9387: LLVM backend: redundant code for functions calling themselves
-------------------------------------+-------------------------------------
              Reporter:  jmoy        |            Owner:
                  Type:  feature     |           Status:  closed
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.6.3
             Component:  Compiler    |         Keywords:
  (LLVM)                             |     Architecture:  x86_64 (amd64)
            Resolution:  invalid     |       Difficulty:  Unknown
      Operating System:  Linux       |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by rwbarton):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 [http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-June/051355.html This
 mailing list thread] has more information on `opt` vs `llc`, with a
 similar example.

 Use `ghc -v` to see the steps GHC goes through to compile your file. It
 runs `opt` before `llc`, and you can see from inspecting `Fib.o` that the
 stack spilling is not present. (You can also inspect the actual
 intermediate files with `ghc -v -keep-tmp-files`.)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9387#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler