September 2015 - ghc-tickets

Re: [GHC] #7542: GHC doesn't optimize (strict) composition with id
by GHC 15 Sep '15

15 Sep '15

#7542: GHC doesn't optimize (strict) composition with id -------------------------------------+------------------------------------- Reporter: shachaf | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.6.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by WrenThornton): * cc: wren@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7542#comment:20> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7259: Eta expansion of products in System FC
by GHC 15 Sep '15

15 Sep '15

#7259: Eta expansion of products in System FC -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.6.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by WrenThornton): * cc: wren@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7259#comment:15> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #5692: Source code with large floating constants in exponential notation cannot be compiled
by GHC 15 Sep '15

15 Sep '15

#5692: Source code with large floating constants in exponential notation cannot be compiled -------------------------------------+------------------------------------- Reporter: gracjan | Owner: pcapriotti Type: bug | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: Blocked By: | Blocking: Related Tickets: 5688 | Differential Revisions: -------------------------------------+------------------------------------- Changes (by WrenThornton): * cc: wren@… (added) Comment: FWIW, the [http://hackage.haskell.org/package/bytestring-lexing bytestring-lexing] library has extremely efficient implementations of reading real literals for types which have limited precision (e.g., `Float` and `Double`). The functions in question are `readDecimalLimited` and `readExponentialLimited` in `Data.ByteString.Lex.Fractional`. The repo for the package also includes benchmarks. Surely GHC doesn't need to optimize lexing quite so much as bytestring- lexing has done, but in the interest of minimizing code duplication/maintenance, I would be totally fine having bytestring-lexing become one of the core libraries GHC uses. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5692#comment:7> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #5615: ghc produces poor code for `div` with constant powers of 2.
by GHC 15 Sep '15

15 Sep '15

#5615: ghc produces poor code for `div` with constant powers of 2. -------------------------------------+------------------------------------- Reporter: Lennart | Owner: | daniel.is.fischer Type: bug | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.4.1-rc1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: x86 Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by WrenThornton): * cc: wren@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5615#comment:22> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #4470: Loop optimization: identical counters
by GHC 15 Sep '15

15 Sep '15

#4470: Loop optimization: identical counters -------------------------------------+------------------------------------- Reporter: choenerzs | Owner: Type: feature request | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: Resolution: | Keywords: loop | optimization Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by WrenThornton): * cc: wren@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4470#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #4385: Type-level natural numbers
by GHC 15 Sep '15

15 Sep '15

#4385: Type-level natural numbers -------------------------------------+------------------------------------- Reporter: diatchki | Owner: diatchki Type: feature request | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler (Type | Version: checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by WrenThornton): * cc: wren@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4385#comment:75> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #4937: Remove indirections caused by sum types, such as Maybe
by GHC 15 Sep '15

15 Sep '15

#4937: Remove indirections caused by sum types, such as Maybe -------------------------------------+------------------------------------- Reporter: tibbe | Owner: Type: feature request | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by WrenThornton): * cc: winterkoninkje+ghc@… (removed) * cc: wren@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4937#comment:24> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #3242: ghci: can't load .so/.DLL for: m (addDLL: could not load DLL)
by GHC 15 Sep '15

15 Sep '15

#3242: ghci: can't load .so/.DLL for: m (addDLL: could not load DLL) ---------------------------------+-------------------------------- Reporter: jeffz1 | Owner: Type: bug | Status: new Priority: high | Milestone: 8.0.1 Component: GHCi | Version: 7.4.1 Resolution: | Keywords: Operating System: Windows | Architecture: x86 Type of failure: None/Unknown | Test Case: Blocked By: 3658 | Blocking: Related Tickets: #7097 | Differential Revisions: ---------------------------------+-------------------------------- Changes (by WrenThornton): * cc: winterkoninkje+ghc@… (removed) * cc: wren@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3242#comment:37> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #229: Integer overflow in array allocation
by GHC 15 Sep '15

15 Sep '15

#229: Integer overflow in array allocation -------------------------------------+------------------------------------- Reporter: josefs | Owner: rwbarton Type: bug | Status: new Priority: high | Milestone: 8.0.1 Component: Core Libraries | Version: 7.9 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by WrenThornton): * cc: winterkoninkje+ghc@… (removed) * cc: wren@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/229#comment:23> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #4937: Remove indirections caused by sum types, such as Maybe
by GHC 15 Sep '15

15 Sep '15

#4937: Remove indirections caused by sum types, such as Maybe -------------------------------------+------------------------------------- Reporter: tibbe | Owner: Type: feature request | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by WrenThornton): * cc: winterkoninkje+ghc@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4937#comment:23> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0