#2325: Compile-time computations
--------------------------------------+-------------------------------------
Reporter: ajd | Owner:
Type: run-time performance bug | Status: new
Priority: normal | Milestone: 6.10 branch
Component: Compiler | Version: 6.8.2
Severity: normal | Resolution:
Keywords: constant folding | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
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Changes (by igloo):
* milestone: => 6.10 branch
Comment:
Can we do the rule at an earlier point, i.e.
{{{
(fromInteger <numeric literal x>) + (fromInteger <numeric literal y>)
==>
(fromInteger <numeric literal (x + y)>)
}}}
where we have inferred that the type is `Integer`? Then we don't have to
worry about any checking that we don't already do.
Re word size differences, we already have that problem when we transform
{{{
(fromInteger 3)
}}}
into
{{{
S# 3
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2325#comment:3>
GHC <http://www.haskell.org/ghc/>
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