[GHC] #9356: scanl does not participate in list fusion
GHC
ghc-devs at haskell.org
Tue Oct 7 18:52:44 UTC 2014
#9356: scanl does not participate in list fusion
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Reporter: dfeuer | Owner:
Type: bug | Status: patch
Priority: normal | Milestone:
Component: Compiler | Version: 7.8.3
Resolution: | Keywords:
Operating System: | Architecture: Unknown/Multiple
Unknown/Multiple | Difficulty: Unknown
Type of failure: Runtime | Blocked By:
performance bug | Related Tickets:
Test Case: |
Blocking: |
Differential Revisions: |
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Comment (by Joachim Breitner <mail@…>):
In [changeset:"d45693a5384460d22a6437b9cda463b4ec4b6a37/ghc"]:
{{{
#!CommitTicketReference repository="ghc"
revision="d45693a5384460d22a6437b9cda463b4ec4b6a37"
Make scanl fuse; add scanl'
Summary:
Make scanl a good producer and a good consumer for fold/build
fusion. Add strictly-accumulating scanl', which is required for
Data.List.inits.
Reviewers: nomeata, austin
Reviewed By: austin
Subscribers: spacekitteh, thomie, carter, ezyang, simonmar
Differential Revision: https://phabricator.haskell.org/D314
GHC Trac Issues: #9356
}}}
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9356#comment:8>
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