#683: RULES for recursive functions don't work properly
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Reporter: simonpj | Owner: simonpj
Type: bug | Status: closed
Priority: low | Milestone: _|_
Component: Compiler | Version: 6.4.1
Severity: normal | Resolution: fixed
Keywords: | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
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Changes (by simonpj):
* status: new => closed
* resolution: => fixed
Comment:
The HEAD contains a much better treatment of recursion involving rewrite
rules; see `Note [Loop breaking and RULES]` in `OccAnal`.
I just checked that `mapM_ action [n..m]` fuses nicely (it does), and
Roman's example above has the inlining for `bar`.
So this one seems to be done. As is often the case with performance bugs,
we don't have a good way to add a regression test. So I'm just closing
it.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/683#comment:9>
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