Timeline


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May 3, 2008:

9:19 PM Ticket #2261 (Foreign.C.Error.Errno should be an instance of (Eq,Ord, Show... others?)) created by TomMD
Errno, the Haskell encapsulation of the CInt 'errno' value, should be an …
8:22 PM Ticket #2260 (Non-ideal error message for misplaced LANGUAGE pragma) created by TomMD
Placing the LANGUAGE pragma anywhere besides the top results in it not …
12:36 PM Ticket #2259 (can not make `if` look nice in a `do`) closed by igloo
invalid: Thanks for the report. However, GHC is just following the language …
9:07 AM Ticket #2259 (can not make `if` look nice in a `do`) created by jsnx
The handling of if within a do block is not consistent with …

May 2, 2008:

7:16 PM Commentary/CodingStyle edited by simonpj
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4:09 PM Ticket #2188 (TH scoping problem) closed by igloo
fixed: The 6.8 branch is already OK, so closing this bug.
4:07 PM Ticket #2238 (panic nameModule tpl_B1{v}) closed by igloo
fixed: After a manual merge the test still failed, so I've just made the test an …
4:05 PM Changeset in ghc [da3f49f]ghc-7.8wip/T8545-ghc-7.8wip/T8776wip/T8959wip/T8995-level-generalisationwip/T9023wip/T9136wip/ampwip/ermsbwip/ext-solverwip/generics-propeqwip/nested-cprwip/orfwip/pattern-synonymswip/recurs-compatwip/travis by Ian Lynagh <igloo@…>
We expect T2238 to fail with GHC 6.8
4:05 PM Changeset in testsuite [766730f]at-defaultsatomicsdata-kind-syntaxencodingghc-7.2ghc-7.4ghc-7.6ghc-deferghc-new-comonad-compno-pred-tyoverlapping-tyfamspatch-4404patch-5014patch-5084tc-untouchablesth-newtype-natstype-nats-simpleunboxed-tuple-argumentsunboxed-tuple-arguments2wip/nested-cprwip/pattern-synonymswip/th-new by Ian Lynagh <igloo@…>
We expect T2238 to fail with GHC 6.8
8:17 AM Commentary/CodingStyle edited by simonpj
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8:11 AM Commentary/CodingStyle edited by simonpj
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7:41 AM Changeset in base [bc5522e]data-proxydbcsencodingghc-7.2ghc-7.4ghc-7.6ghc-7.8imp-param-classmonad-compsupercompilertype-reasoningwindows-iocp by simonpj@…>
Add comments about why rotate has an INLINE
7:40 AM Ticket #2252 (Extreme performance degradation on minor code change) closed by simona
invalid: Ok, I think I get it. I've added a call to getArgs which makes both …

May 1, 2008:

11:01 PM Changeset in base [6ddafc8]data-proxydbcsencodingghc-7.2ghc-7.4ghc-7.6ghc-7.8imp-param-classmonad-compsupercompilertype-reasoningwindows-iocp by Don Stewart <dons@…>
Inline Data.Bits.rotate@Int, enables rotate to be constant folded All other Bits instances seem to inline well enough on their own to enable constant folding, e.g. sumU . mapU (`shift` 3) . replicateU 10000000 $ (7 :: Int) goes to: Main.$wfold = \ (ww_sOb :: Int#) (ww1_sOf :: Int#) -> case ww1_sOf of wild_XM { __DEFAULT -> Main.$wfold (+# ww_sOb 56) (+# wild_XM 1); 10000000 -> ww_sOb } With this patch, rotate gets inlined and folded too, sumU . mapU (`rotate` 3) . replicateU 10000000 $ (7 :: Int) to: Main.$wfold = \ (ww_sO7 :: Int#) (ww1_sOb :: Int#) -> case ww1_sOb of wild_XM { __DEFAULT -> Main.$wfold (+# ww_sO7 56) (+# wild_XM 1); 10000000 -> ww_sO7 Whereas it was left as a call to $wrotate before.
10:51 PM Ticket #2258 (ghc --cleanup) created by claus
calling ghc --make generates a lot of files, .o, .hi, .exe, …
9:25 PM Ticket #2257 (validate hangs in configure) created by nr
Running ./validate on a freshly updated HEAD results in the script hanging …
8:52 PM Changeset in ghc [92049cd6]coerciblecoloured-coredata-kind-syntaxghc-7.2ghc-7.4ghc-7.6ghc-7.8ghc-lwc2ghc-new-flavorghc-spjlate-lam-liftlocal-gcmonad-compno-pred-tysdocsupercompilertc-untouchablesth-new-7.6wip/T4404wip/T5084wip/T7704wip/T8545-ghc-7.8wip/T8592wip/T8776wip/T8959wip/T8995-level-generalisationwip/T9023wip/T9136wip/ampwip/cbv-conv-thunkwip/common-contextwip/ermsbwip/exprAritywip/ext-solverwip/generics-propeqwip/nested-cprwip/orfwip/pattern-synonymswip/recurs-compatwip/simdwip/th-newwip/travis by claus.reinke@…>
document :source command for GHCi, point to Haskell wiki as discussed in this thread: http://www.haskell.org/pipermail/glasgow-haskell-users/2008-April/014614.html
3:27 PM Changeset in ghc [29edb8f8]coerciblecoloured-coredata-kind-syntaxghc-7.2ghc-7.4ghc-7.6ghc-7.8ghc-lwc2ghc-new-flavorghc-spjlate-lam-liftlocal-gcmonad-compno-pred-tysdocsupercompilertc-untouchablesth-new-7.6wip/T4404wip/T5084wip/T7704wip/T8545-ghc-7.8wip/T8592wip/T8776wip/T8959wip/T8995-level-generalisationwip/T9023wip/T9136wip/ampwip/cbv-conv-thunkwip/common-contextwip/ermsbwip/exprAritywip/ext-solverwip/generics-propeqwip/nested-cprwip/orfwip/pattern-synonymswip/recurs-compatwip/simdwip/th-newwip/travis by claus.reinke@…>
Document ghc-pkg find-module, substring matching, and multi-field selection Documentation and examples taken from - ghc-pkg/Main.hs usageHeader - patch: FIX 1463 (implement 'ghc-pkg find-module') - patch: FIX #1839, #1463, by supporting ghc-pkg bulk queries with substring matching
1:59 PM Ticket #2256 (Incompleteness of type inference: must quantify over implication ...) created by simonpj
Consider this program (from Iavor) […] This example is rejected by both …
1:33 PM Ticket #2247 (GHC accepts FD violations, unless the conflicing instances are used) reopened by claus
Replying to simonpj: > I assume you are using some flags? …
11:04 AM Ticket #2247 (GHC accepts FD violations, unless the conflicing instances are used) closed by simonpj
duplicate: I assume you are using some flags? […] Adding -XFlexibleInstances
7:43 AM Ticket #2255 (Improve SpecConstr for free variables) created by simonpj
This ticket records a suggestion for improving SpecConstr, so we don't …
7:16 AM DataParallel/BenchmarkStatus edited by gckeller
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7:15 AM DataParallel/BenchmarkStatus edited by gckeller
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6:19 AM DataParallel/BenchmarkStatus created by chak
6:18 AM DataParallel edited by chak
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6:16 AM DataParallel/Benchmarks edited by chak
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6:14 AM DataParallel/Benchmarks edited by chak
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6:13 AM DataParallel edited by chak
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2:42 AM Changeset in base [56e2ad7]data-proxydbcsencodingghc-7.2ghc-7.4ghc-7.6ghc-7.8imp-param-classmonad-compsupercompilertype-reasoningwindows-iocp by keller@…>
Moved def. of emptyP
1:25 AM Changeset in base [29187a3]data-proxydbcsencodingghc-7.2ghc-7.4ghc-7.6ghc-7.8imp-param-classmonad-compsupercompilertype-reasoningwindows-iocp by keller@…>
emptyP def to gHC.PArr

Apr 30, 2008:

11:50 PM Ticket #2254 (have Control.Arrow re-export (>>>) and (<<<)) created by ross
#1773 split the Arrow class, making (>>>) and (<<<) functions in …
11:10 PM Changeset in base [c63b766]data-proxydbcsencodingghc-7.2ghc-7.4ghc-7.6ghc-7.8imp-param-classmonad-compsupercompilertype-reasoningwindows-iocp by Don Stewart <dons@…>
Reexport (>>>) and (<<<) from Control.Arrow. Preserves API compatibility
9:56 PM TypeFunctionsStatus edited by simonpj
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9:50 PM Commentary/Compiler/NewCodeGen edited by simonpj
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9:43 PM Changeset in base [f3cb768]data-proxydbcsencodingghc-7.2ghc-7.4ghc-7.6ghc-7.8imp-param-classmonad-compsupercompilertype-reasoningwindows-iocp by simonpj@…>
Add realToFrac RULE comments from patch message into the source code
9:13 PM Ticket #1933 (Zero times in profiling with GHC-6.8.1) closed by igloo
fixed: Merged, and looks good: […]
9:10 PM Ticket #1780 (runInteractiveProcess broken with >2 processes on POSIX) closed by igloo
fixed: Both merged
8:46 PM Changeset in ghc [a94d60a]ghc-7.8wip/T8545-ghc-7.8wip/T8776wip/T8959wip/T8995-level-generalisationwip/T9023wip/T9136wip/ampwip/ermsbwip/ext-solverwip/generics-propeqwip/nested-cprwip/orfwip/pattern-synonymswip/recurs-compatwip/travis by Simon Marlow <simonmarhaskell@…>
add test for #2228
8:46 PM Changeset in testsuite [a9c49e6]at-defaultsatomicsdata-kind-syntaxencodingghc-7.2ghc-7.4ghc-7.6ghc-deferghc-new-comonad-compno-pred-tyoverlapping-tyfamspatch-4404patch-5014patch-5084tc-untouchablesth-newtype-natstype-nats-simpleunboxed-tuple-argumentsunboxed-tuple-arguments2wip/nested-cprwip/pattern-synonymswip/th-new by Simon Marlow <simonmarhaskell@…>
add test for #2228
7:34 PM Ticket #2137 (Location of shadowed binding is wrong in warning) closed by igloo
fixed: Test now passes correctly.
7:30 PM Ticket #2136 (Not warned about unused recursive bindings) closed by igloo
fixed: This doesn't merge cleanly, and I (the reporter) don't think it's very …
7:19 PM Ticket #2253 (Native code generator could do better) created by dons
An example set of programs that came up in the ndp library, where the C …[…]
6:00 PM Ticket #2251 (Missing conversion rules for realToFrac causing slowdowns in Int->Double ...) closed by dons
fixed: I've pushed a patch adding the rules for Int->Double and Int->Float. See: …
5:41 PM Changeset in base [4353908]data-proxydbcsencodingghc-7.2ghc-7.4ghc-7.6ghc-7.8imp-param-classmonad-compsupercompilertype-reasoningwindows-iocp by Don Stewart <dons@…>
Add RULES for realToFrac from Int. {-# RULES "realToFrac/Int->Double" realToFrac = int2Double "realToFrac/Int->Float" realToFrac = int2Float #-} Note that this only matters for realToFrac. If you've been using fromIntegral to promote Int to Doubles, things should be fine as they are. The following program, using stream fusion to eliminate arrays: import Data.Array.Vector n = 40000000 main = do let c = replicateU n (2::Double) a = mapU realToFrac (enumFromToU 0 (n-1) ) :: UArr Double print (sumU (zipWithU (*) c a)) Yields this loop body without the RULE: case $wtoRational sc_sY4 of ww_aM7 { (# ww1_aM9, ww2_aMa #) -> case $wfromRat ww1_aM9 ww2_aMa of tpl_X1P { D# ipv_sW3 -> Main.$s$wfold (+# sc_sY4 1) (+# wild_X1i 1) (+## sc2_sY6 (*## 2.0 ipv_sW3)) And with the rule: Main.$s$wfold (+# sc_sXT 1) (+# wild_X1h 1) (+## sc2_sXV (*## 2.0 (int2Double# sc_sXT))) The running time of the program goes from 120 seconds to 0.198 seconds with the native backend, and 0.143 seconds with the C backend. And just so I don't forget, here's the difference in resulting assembly (x86_64), between the native code generator, and the C backend. -fasm Main_zdszdwfold_info: movq %rdi,%rax cmpq $40000000,%rax jne .LcZK jmp *(%rbp) .LcZK: cmpq $39999999,%rsi jg .LcZN cvtsi2sdq %rsi,%xmm0 mulsd .LnZP(%rip),%xmm0 movsd %xmm5,%xmm7 addsd %xmm0,%xmm7 incq %rax incq %rsi movq %rax,%rdi movsd %xmm7,%xmm5 jmp Main_zdszdwfold_info With the C backend we get the even better assembly, (-fvia-C -optc-O3) Main_zdszdwfold_info: cmpq $40000000, %rdi je .L9 .L5: cmpq $39999999, %rsi jg .L9 cvtsi2sdq %rsi, %xmm0 leaq 1(%rdi), %rdi addq $1, %rsi addsd %xmm0, %xmm0 addsd %xmm0, %xmm5 jmp Main_zdszdwfold_info .L9: jmp *(%rbp) So might make a useful test once the native codegen project starts up.
4:58 PM Internships edited by simonpj
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3:41 PM ExplicitCallStack edited by igloo
Add another alternative (diff)
8:55 AM Ticket #2252 (Extreme performance degradation on minor code change) created by simona
The attached code runs two similar calculations (call them a and …
12:29 AM Ticket #2251 (Missing conversion rules for realToFrac causing slowdowns in Int->Double ...) created by dons
GHC.Real and GHC.Float currently have: […] But these avoid some …

Apr 29, 2008:

10:42 PM Ticket #2250 (unpackFamily on Windows fails match) created by larsv
In the HostEntry returned by Network.BSD.getHostByName, evaluating the …
10:09 PM Ticket #2249 (Undeclared variable in cmm reports as panic) created by millenix
In CMM code, if one makes an assignment to a variable that's not been …
4:36 PM Ticket #2248 (.exe extension missing when compiling a file ending in dot + digits + dot ...) created by oboudry
Hi all, I just encountered this very minor bug on Windows/GHC 6.8.2 When …
2:06 PM Ticket #2117 (ppc "./Setup build" seg-faults on Mac OS leopard) closed by igloo
duplicate: I'm closing this as a duplicate of #1958. Please reopen if you think that …
8:23 AM Building/Windows edited by dias
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Apr 28, 2008:

11:25 PM Ticket #2155 (More deadlock issues with concurrent I/O) closed by simonmar
duplicate: Now fixed, it was indeed a duplicate of #1780.
11:11 PM Ticket #2247 (GHC accepts FD violations, unless the conflicing instances are used) created by claus
consider […] the class instance for FD is odd, because there is no …
10:53 PM Changeset in process [a49b60e]encodingghc-7.2ghc-7.4ghc-7.6ghc-7.8 by Simon Marlow <simonmarhaskell@…>
move process tests here from the main testsuite
9:59 PM Changeset in process [4993245]encodingghc-7.2ghc-7.4ghc-7.6ghc-7.8 by Simon Marlow <simonmarhaskell@…>
FIX #1780: set pipe descriptors FD_CLOEXEC in the parent
8:07 PM Ticket #2246 (Numeric literal very badly optimized) created by guest
Compile the following program with -ddump-simpl […] Note how there's …
8:01 PM Ticket #2245 (Numeric literal printed wrong in error message) created by guest
Compile the following with -Wall […] The error message says […] …
2:12 AM Status/May08 edited by chak
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2:11 AM Status/May08 created by chak
2:10 AM Status edited by chak
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