[commit: ghc] master: Deduplicate one-shot/make compile paths. (427f8a1)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/427f8a15c385de486d479989ecfbb6f82699f405/ghc

>---------------------------------------------------------------

commit 427f8a15c385de486d479989ecfbb6f82699f405
Author: Edward Z. Yang <ezyang at cs.stanford.edu>
Date:   Fri Oct 2 22:05:24 2015 -0700

    Deduplicate one-shot/make compile paths.
    
    Summary:
    We had a duplicate copy of the code for --make and for -c
    which was a pain.  The call graph looked something like this:
    
        compileOne -> genericHscCompileGetFrontendResult -> genericHscFrontend
                                       hscCompileOneShot ---^
    
    with genericHscCompileGetFrontendResult and hscCompileOneShot
    duplicating logic for deciding whether or not recompilation
    was needed.
    
    This patchset fixes it, so now everything goes through this call-chain:
    
        compileOne (--make entry point)
            Calls hscIncrementCompile, invokes the pipeline to do codegen
            and sets up linkables.
        hscIncrementalCompile (-c entry point)
            Calls hscIncrementalFrontend, and then simplifying,
            desugaring, and writing out the interface.
        hscIncrementalFrontend
            Performs recompilation avoidance, if recompilation needed,
            does parses typechecking.
    
    I also cleaned up some of the MergeBoot nonsense by introducing
    a FrontendResult type.
    
    NB: this BREAKS #8101 again, because I can't unconditionally desugar
    due to Haddock barfing on lint, see #10600
    
    Signed-off-by: Edward Z. Yang <ezyang at cs.stanford.edu>
    
    Test Plan: validate
    
    Reviewers: simonpj, bgamari, simonmar, austin
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D1302


>---------------------------------------------------------------

427f8a15c385de486d479989ecfbb6f82699f405
 compiler/main/DriverPipeline.hs | 257 ++++++++++++---------------------
 compiler/main/Hooks.hs          |   5 +-
 compiler/main/HscMain.hs        | 310 +++++++++++++++++++++-------------------
 compiler/typecheck/TcRnTypes.hs |   7 +
 testsuite/tests/driver/all.T    |   2 +-
 5 files changed, 261 insertions(+), 320 deletions(-)

Diff suppressed because of size. To see it, use:

    git diff-tree --root --patch-with-stat --no-color --find-copies-harder --ignore-space-at-eol --cc 427f8a15c385de486d479989ecfbb6f82699f405