#6135: Unboxed Booleans ---------------------------------+------------------------------------------ Reporter: benl | Owner: jstolarek Type: feature request | Status: patch Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.4.1 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: #605 | ---------------------------------+------------------------------------------ Comment(by jstolarek): I'm having some problems and I admit I could use some hint on what to do. I'm able to build the stage1 compiler, but every program compiled with it segfaults immediately. Looks like the approach I used to add the new prototype primops does not extend easily to modifying the existing primops. Here's the summary of what I did: * I changed primop definitions to return Int# ([[GhcFile(compiler/prelude/primops.txt.pp)]]) and modified genprimopcode accordingly ([[GhcFile(utils/genprimopcode/Syntax.hs)]]) * I modified Compare primop info to return Int# instead of Bool ([[GhcFile(compiler/prelude/PrimOp.lhs)]]) * I fixed the automatic deriving of Eq and Ord typeclasses ([[GhcFile(compiler/typecheck/TcGenDeriv.lhs)]]) * I removed all the comparison primop Core rules, so they wouldn't get in the way ([[GhcFile( compiler/prelude/PrelRules.lhs)]]). Once I get things working I will create new rules. * Once I realized that I'm getting segfaults I commented out some !MachOp rules in ([[GhcFile(compiler/cmm/CmmMachOp.hs)]]) (namely functions isComparisonMachOp and maybeInvertComparison) to make sure that problems are not caused by them. * I added primop wrappers in ghc-prim library and I modified base, ghc- prim and integer-gmp libraries to use those wrappers. I pushed these changes to github. The diffs are here: [https://github.com/jstolarek/ghc/commit/b5be2fb1083d16239024849b60a4b3009e67... GHC], [https://github.com/jstolarek/packages- base/commit/c484bcee5898257ceceecd9c354eadc376075e9c base], [https://github.com/jstolarek/packages-ghc- prim/commit/26096ff8875d8a6b1158078799cf394c654bdc50 ghc-prim], [https://github.com/jstolarek/packages-integer- gmp/commit/101bbc83ae632c8d2a1cd08bc9b68532f8e50a6a integer-gmp]. If anyone would be willing to look at them and suggest me where I went wrong I would be grateful. I know I need to make some more changes in ghc-prim library in GHC.!IntWord64 module and cbits, but I'm leaving that for now. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/6135#comment:45 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler