[commit: ghc] master: Add tracing infrastructure to pattern match checker (25c8e80)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/25c8e80eccc512d05c0ca8df401271db65b5987b/ghc

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commit 25c8e80eccc512d05c0ca8df401271db65b5987b
Author: Matthew Pickering <matthewtpickering at gmail.com>
Date:   Sun Nov 6 12:47:48 2016 +0000

    Add tracing infrastructure to pattern match checker
    
    Summary:
    This is the start of some tracing infrastructure which I found useful
    when working through how the pattern match checker worked.
    
    It adds the flag -ddump-ec-trace in order to turn on the trace.
    
    Reviewers: austin, bgamari
    
    Reviewed By: bgamari
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D2658


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25c8e80eccc512d05c0ca8df401271db65b5987b
 compiler/deSugar/Check.hs      | 60 +++++++++++++++++++++++++++++++++++++++---
 compiler/deSugar/DsMonad.hs    |  6 ++++-
 compiler/hsSyn/HsExpr.hs       |  4 +++
 compiler/main/DynFlags.hs      |  4 +++
 docs/users_guide/debugging.rst |  5 ++++
 5 files changed, 75 insertions(+), 4 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 25c8e80eccc512d05c0ca8df401271db65b5987b