linearscan-0.1.0.0: linearscan.cabal
name: linearscan
version: 0.1.0.0
synopsis: Linear scan register allocator, formally verified in Coq
homepage: http://github.com/jwiegley/linearscan
license: BSD3
license-file: LICENSE
author: John Wiegley
maintainer: johnw@newartisans.com
category: Development
build-type: Simple
cabal-version: >=1.10
description:
The @linearscan@ library is an implementation -- in Coq, extracted to
Haskell -- of a register allocation algorithm developed by Christian Wimmer.
It is described in detail in his Masters thesis, which can be found at
<http://www.christianwimmer.at/Publications/Wimmer04a/Wimmer04a.pdf>. A
Java implementation of this same algorithm, by that author, is used in
Oracle's Graal project.
.
This version of the algorithm was written and verified in Coq, containing
over 130 proved lemmas, at over 5K LOC. It was funded as a research project
by BAE Systems (<http://www.baesystems.com>), to be used in an in-house
compiler written in Haskell.
.
In order for the Coq code to be usable from Haskell, it is first extracted
from Coq as a Haskell library, during which many of Coq's fundamental types
are mapped directly onto counterparts in the Haskell Prelude. Thus, it
should be within the performance range of an equivalent implementation
written directly in Haskell.
.
Note that not every conceivable property of this library has been proven.
For some of the lower layers this is true, because the algebraic constraints
on these components could be exhaustively described in the context of their
use. However, higher-level components represent a great variety of use
cases, and not every one of these cases has been proven correct. This
represents an ongoing effort, with the hope that proofs will entirely
replace the necessity for ad hoc unit testing, and that at some point we can
know that any allocation produced by this library must either fail, or be
mathematically sound.
.
This library's sole entry point is the 'LinearScan.allocate' function, which
takes a list of information about basic blocks to an equivalent list, with
annotations indicating allocation choices. In order to use this function
you must first convert from your own basic block representation to that of
the @BlockInfo@, @OpInfo@ and @VarInfo@ structures used by this library.
For example of such a transformation from a Hoopl Graph, see the file
@Tempest.hs@ in the tests directory.
library
default-language: Haskell2010
exposed-modules:
LinearScan
other-modules:
LinearScan.Datatypes
LinearScan.IApplicative
LinearScan.IEndo
LinearScan.IMonad
LinearScan.IState
LinearScan.Interval
LinearScan.Lib
-- LinearScan.List0
LinearScan.Logic
LinearScan.Main
LinearScan.NonEmpty0
-- LinearScan.Peano
LinearScan.Range
LinearScan.Specif
LinearScan.Utils
LinearScan.Vector0
LinearScan.Eqtype
LinearScan.Fintype
LinearScan.Seq
LinearScan.Ssrbool
-- LinearScan.Ssreflect
LinearScan.Ssrfun
LinearScan.Ssrnat
ghc-options: -fno-warn-deprecated-flags
build-depends: base >=4.7 && <4.8
, transformers
test-suite test
default-language: Haskell2010
type: exitcode-stdio-1.0
ghc-options: -fno-warn-deprecated-flags
hs-source-dirs: test
main-is: Main.hs
build-depends:
base >=3
, linearscan
, HUnit >= 1.2.5
, hspec >= 1.4.4
, hspec-expectations >= 0.3
, hoopl >= 3.10
, containers >= 0.5.5
, transformers >= 0.3.0.0
, free