#7116: Missing optimisation: strength reduction of floating-point multiplication
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Reporter: simonmar | Owner: pcapriotti
Type: bug | Status: new
Priority: normal | Milestone: 7.8.1
Component: Compiler | Version: 7.4.2
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: Runtime performance bug
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Changes (by simonpj):
* owner: => pcapriotti
Comment:
Paolo: yes, please commit your patch. But could you add a comment `Note
[Strength reduction]` that explains how it works. In particular the "lit"
is always `2`, and the `op` is always `(+)`; but at either `Float` or
`Double`. Perhapas you can name the `op` parameter `add_op`? And `lit`
can be `two_lit`. But the comment as well!
Thanks
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7116#comment:3>
GHC <http://www.haskell.org/ghc/>
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