#3969: Poor performance of generated code on x86.
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Reporter: milan | Owner:
Type: bug | Status: closed
Priority: normal | Milestone:
Component: Compiler | Version: 6.12.1
Resolution: wontfix | Keywords: x86, runtime
performance
Difficulty: | Os: Unknown/Multiple
Testcase: | Architecture: x86
Failure: Runtime performance bug |
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Changes (by simonmar):
* status: new => closed
* resolution: => wontfix
Comment:
This is exactly the kind of thing that LLVM and the new backend will fix.
The problem is that the inner loop is not being treated like a loop by the
code generator. On x86_64 we have registers for argument-passing which
hides the problem to some extent, but the real fix is to do better native
code generation.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3969#comment:1>
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