July 2013 - ghc-tickets

Re: [GHC] #7116: Missing optimisation: strength reduction of floating-point multiplication
by GHC 31 Jul '13

31 Jul '13

#7116: Missing optimisation: strength reduction of floating-point multiplication --------------------------------------------+------------------------------ Reporter: simonmar | Owner: Type: bug | Status: closed Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.4.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime performance bug | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Changes (by jstolarek): * status: patch => closed * resolution: => fixed Comment: I pushed fix into HEAD. Really sorry about the merge commit - the moment I pushed I realized that I didn't pull with `--rebase`. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7116#comment:10> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7116: Missing optimisation: strength reduction of floating-point multiplication
by GHC 31 Jul '13

31 Jul '13

#7116: Missing optimisation: strength reduction of floating-point multiplication --------------------------------------------+------------------------------ Reporter: simonmar | Owner: Type: bug | Status: patch Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.4.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime performance bug | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Comment (by jan.stolarek@…): commit 838e2fda9892e61da85187803cce45b3f815b86e {{{ Author: Jan Stolarek <jan.stolarek(a)p.lodz.pl> Date: Mon Jul 8 16:20:43 2013 +0100 Add strength reduction rules (Fixes #7116) This patch adds rules for converting floating point multiplication of the form 2.0 * x and x * 2.0 into addition x + x. compiler/prelude/PrelRules.lhs | 33 +++++++++++++++++++++++++++------ 1 file changed, 27 insertions(+), 6 deletions(-) }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7116#comment:9> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7116: Missing optimisation: strength reduction of floating-point multiplication
by GHC 31 Jul '13

31 Jul '13

#7116: Missing optimisation: strength reduction of floating-point multiplication --------------------------------------------+------------------------------ Reporter: simonmar | Owner: Type: bug | Status: patch Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.4.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime performance bug | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Changes (by jstolarek): * cc: jan.stolarek@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7116#comment:8> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7835: ghc --make: allow passign .cmm, .c and .hs files in one command line
by GHC 30 Jul '13

30 Jul '13

#7835: ghc --make: allow passign .cmm, .c and .hs files in one command line -------------------------------------+------------------------------------ Reporter: slyfox | Owner: Type: feature request | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.6.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by igloo): * status: new => closed * difficulty: => Unknown * resolution: => fixed Comment: Thanks for the report. Fixed by: commit a10e1990edc8104640738e5209e7a70f464fca38 {{{ Author: Ian Lynagh <ian(a)well-typed.com> Date: Tue Jul 30 22:11:41 2013 +0100 Change which files --make mode thinks are 'Haskellish' It thought that .cmm files were Haskellish, but then didn't know how to compile them. Now they aren't treated as Haskellish, and it can compile and link them. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7835#comment:1> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7017: Rethink need for tarballs under "friendly" environment
by GHC 30 Jul '13

30 Jul '13

#7017: Rethink need for tarballs under "friendly" environment -------------------------------------+------------------------------------ Reporter: FUZxxl | Owner: Type: task | Status: closed Priority: high | Milestone: 7.8.1 Component: Build System | Version: 7.4.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: Other | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by nomeata): > The Windows tarballs are now in a separate repository, and end up in a separate tarball. Thanks, very much appreciated! -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7017#comment:7> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7855: Use optimizer for more information about incomplete pattern matches
by GHC 30 Jul '13

30 Jul '13

#7855: Use optimizer for more information about incomplete pattern matches --------------------------------------------+------------------------------ Reporter: ezyang | Owner: Type: feature request | Status: closed Priority: normal | Milestone: Component: Compiler (Type checker) | Version: 7.7 Resolution: wontfix | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Changes (by igloo): * status: new => closed * resolution: => wontfix Comment: No-one's spoken up in favour of the proposal, so I'm closing this ticket. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7855#comment:2> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7017: Rethink need for tarballs under "friendly" environment
by GHC 30 Jul '13

30 Jul '13

#7017: Rethink need for tarballs under "friendly" environment -------------------------------------+------------------------------------ Reporter: FUZxxl | Owner: Type: task | Status: closed Priority: high | Milestone: 7.8.1 Component: Build System | Version: 7.4.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: Other | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by igloo): * status: new => closed * resolution: => fixed Comment: The Windows tarballs are now in a separate repository, and end up in a separate tarball. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7017#comment:6> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #3649: inconsistent exception between unix/windows for running non-existant program
by GHC 30 Jul '13

30 Jul '13

#3649: inconsistent exception between unix/windows for running non-existant program --------------------------------------+------------------------------------ Reporter: duncan | Owner: Type: bug | Status: new Priority: low | Milestone: 7.6.2 Component: libraries/process | Version: 6.10.4 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: --------------------------------------+------------------------------------ Changes (by duncan): * status: closed => new * resolution: fixed => Comment: Note that the C code still says (roughly): {{{ if (close_fds) { int i; // XXX Not the pipe for (i = 3; i < max_fd; i++) { close(i); } } }}} Which means that this nice new error handling will (I think) go wrong in the `CreateProcess { close_fds = True }` case. Should be easy to fix, just something like... {{{ for (i = 3; i < max_fd; i++) { if (i != forkCommunicationFds[1]) { close(i); } } }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3649#comment:10> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7978: Profiling broken
by GHC 30 Jul '13

30 Jul '13

#7978: Profiling broken --------------------------------------------+------------------------------ Reporter: gmainland | Owner: Type: bug | Status: new Priority: highest | Milestone: 7.8.1 Component: Compiler | Version: 7.7 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC doesn't work at all | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Comment (by parcs): Looks like GHC itself is broken when built with `BuildFlavour=prof`: {{{ ===--- building phase 0 make -r --no-print-directory -f ghc.mk phase=0 phase_0_builds make[1]: Nothing to be done for `phase_0_builds'. ===--- building phase 1 make -r --no-print-directory -f ghc.mk phase=1 phase_1_builds make[1]: Nothing to be done for `phase_1_builds'. ===--- building final phase make -r --no-print-directory -f ghc.mk phase=final all "inplace/bin/ghc-stage2" -hisuf hi -osuf o -hcsuf hc -static -H64m -O0 -fasm -package-name old-time-1.1.0.1 -hide-all-packages -i -ilibraries /old-time/. -ilibraries/old-time/dist-install/build -ilibraries/old-time /dist-install/build/autogen -Ilibraries/old-time/dist-install/build -Ilibraries/old-time/dist-install/build/autogen -Ilibraries/old- time/include -optP-include -optPlibraries/old-time/dist- install/build/autogen/cabal_macros.h -package base-4.7.0.0 -package old- locale-1.0.0.5 -XHaskell98 -XCPP -XForeignFunctionInterface -O -fasm -no- user-package-db -rtsopts -odir libraries/old-time/dist-install/build -hidir libraries/old-time/dist-install/build -stubdir libraries/old-time /dist-install/build -dynamic-too -c libraries/old-time/dist- install/build/System/Time.hs -o libraries/old-time/dist- install/build/System/Time.o -dyno libraries/old-time/dist- install/build/System/Time.dyn_o Segmentation fault make[1]: *** [libraries/old-time/dist-install/build/System/Time.o] Error 139 make: *** [all] Error 2 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7978#comment:10> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

[GHC] #8104: By default GHC API looks for .dyn_o but only creates .o
by GHC 30 Jul '13

30 Jul '13

#8104: By default GHC API looks for .dyn_o but only creates .o ------------------------------------+------------------------------------- Reporter: edsko | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- See the example program for http://ghc.haskell.org/trac/ghc/ticket/7918 . If we change {{{ dynFlags <- getSessionDynFlags void $ setSessionDynFlags (doDynamicToo dynFlags) }}} to {{{ dynFlags <- getSessionDynFlags void $ setSessionDynFlags dynFlags }}} so that we get the default `DynFlags`, the program fails. The program loads two modules A and B, and tries to typecheck B. B uses a quasi-quoter defined in A. With the default `DynFlags` it will fail with {{{ cannot find normal object file ‛./T7918A.dyn_o’ while linking an interpreted expression }}} i.e., it is looking for the `.dyn_o` file but only creates the `.o` file. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8104> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 3