[GHC] #11717: Way to dump cmm only once

[GHC]

#11717: Way to dump cmm only once
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        Reporter:  nomeata           |                Owner:  tvv
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
  (CodeGen)                          |
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2393
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"1ba79fa4d0e13e61a805fa458bcf2e690710d88b/ghc" 1ba79fa/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="1ba79fa4d0e13e61a805fa458bcf2e690710d88b"
 CodeGen: Way to dump cmm only once (#11717)

 The `-ddump-cmm` put all stages of Cmm processing into one output.
 This patch changes its behavior and adds two more options to make
 Cmm dumping flexible.

 - `-ddump-cmm-from-stg` dumps only initial version of  Cmm right after
    STG->Cmm codegen
 - `-ddump-cmm` dumps the final result of the Cmm pipeline processing
 - `-ddump-cmm-verbose` dumps intermediate output of each Cmm pipeline
    step
 - `-ddump-cmm-proc` and `-ddump-cmm-caf` seems were lost. Now enabled

 Test Plan: ./validate

 Reviewers: thomie, simonmar, austin, bgamari

 Reviewed By: thomie, simonmar

 Subscribers: simonpj, thomie

 Differential Revision: https://phabricator.haskell.org/D2393

 GHC Trac Issues: #11717
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11717#comment:5>
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