Re: [GHC] #13367: CSE not working for top-level literal strings

15 Aug 2017

      #13367: CSE not working for top-level literal strings
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:  strings
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  simplCore/should_compile/T13367
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * keywords:   => strings

Old description:
...
Consider
{{{
{-# LANGUAGE MagicHash #-}
module S( z ) where
import GHC.Exts
data T = MkT Addr#
x = MkT "foo"#
y = MkT "foo"#
z = (x,y)
}}}
You'd expect those literal strings to get CSE'd but currently they are
not.
New description:

 Consider
 {{{#!hs
 {-# LANGUAGE MagicHash #-}
 module S( z ) where
 import GHC.Exts

 data T = MkT Addr#

 x = MkT "foo"#
 y = MkT "foo"#

 z = (x,y)
 }}}
 You'd expect those literal strings to get CSE'd but currently they are
 not.

--

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13367#comment:3
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