#5341: signals004(profasm) core lint error
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Reporter: igloo | Owner: simonpj
Type: bug | Status: new
Priority: highest | Milestone: 7.2.1
Component: Compiler | Version: 7.0.3
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Comment(by simonpj@…):
commit 4e72e09348c11b44103ee29990262d44ee86df50
{{{
Author: Simon Peyton Jones <[email protected]>
Date: Wed Jul 27 06:25:45 2011 +0100
Fix let-floating out of Rec blocks
This fixes Trac #5341 and #5342. The question is about
what to do when floating out of the RHS of a Rec-bound
function, when there's a FloatCase involved. For FloatLets
they can join the Rec block, but FloatCases can't. But
we don't want to mess with the arity (that was the bug).
So in this (rather exotic case) we push the FloatCase
back inside any lambdas.
See Note [Floating out of Rec rhss]. It's a slightly ugly fix, but I
can't think of anything better, and I don't think it has any practical
impact.
compiler/simplCore/FloatOut.lhs | 49
++++++++++++++++++++++++++++++++++++--
1 files changed, 46 insertions(+), 3 deletions(-)
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5341#comment:2>
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