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  1. 30 Mar, 2016 4 commits
  3. 29 Mar, 2016 21 commits
    • Josh Bleecher Snyder's avatar
      cmd/compile: add typArray, typSlice, and typDDDArray · eb98e515
      Josh Bleecher Snyder authored 
      These are the first of several convenience
constructors for types.

They are part of type field encapsulation.
This removes most external writes to TARRAY Type and Bound fields.

substAny still directly fiddles with the .Type field.
substAny generally needs access to Type internals.
It will be moved to type.go in a future CL.

bimport still directly writes the .Type field.
This is hard to change.

Also of note:

* inl.go contains an (apparently irrelevant) bug fix:
  as.Right was given the wrong type.
  vararrtype was previously unused.
* I believe that aindex (subr.go) never creates slices,
  but it is safer to keep existing behavior.
  The removal of -1 as a constant there is part
  of hiding that implementation detail.
  Future CLs will finish that job.

Passes toolstash -cmp.

Change-Id: If09bf001a874d7dba08e9ad0bcd6722860af4b91
Reviewed-on: https://go-review.googlesource.com/21249Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      eb98e515
    • Josh Bleecher Snyder's avatar
      cmd/compile: make only one new Node in defaultlit · f32161da
      Josh Bleecher Snyder authored 
      defaultlit and friends sometimes create a new
OLITERAL node, only to have replace it.
Thread hints when that is unnecessary.

name       old time/op     new time/op     delta
Template       318ms ± 6%      322ms ± 4%     ~           (p=0.154 n=24+25)
Unicode        162ms ± 6%      151ms ± 7%   -6.94%        (p=0.000 n=22+23)
GoTypes        1.04s ± 1%      1.04s ± 3%     ~           (p=0.136 n=20+25)
Compiler       5.08s ± 2%      5.10s ± 4%     ~           (p=0.788 n=25+25)
MakeBash       41.4s ± 1%      41.5s ± 1%     ~           (p=0.084 n=25+25)

name       old user-ns/op  new user-ns/op  delta
Template        438M ±10%       441M ± 9%     ~           (p=0.418 n=25+25)
Unicode         272M ± 5%       219M ± 5%  -19.33%        (p=0.000 n=24+21)
GoTypes        1.51G ± 3%      1.51G ± 3%     ~           (p=0.500 n=25+25)
Compiler       7.31G ± 3%      7.32G ± 3%     ~           (p=0.572 n=25+24)

name       old alloc/op    new alloc/op    delta
Template      57.3MB ± 0%     57.2MB ± 0%   -0.16%        (p=0.000 n=25+25)
Unicode       41.1MB ± 0%     38.7MB ± 0%   -5.81%        (p=0.000 n=25+25)
GoTypes        191MB ± 0%      191MB ± 0%   -0.06%        (p=0.000 n=25+25)
Compiler       840MB ± 0%      839MB ± 0%   -0.12%        (p=0.000 n=25+25)

name       old allocs/op   new allocs/op   delta
Template        500k ± 0%       500k ± 0%   -0.12%        (p=0.000 n=24+25)
Unicode         400k ± 0%       384k ± 0%   -4.16%        (p=0.000 n=25+25)
GoTypes        1.50M ± 0%      1.49M ± 0%   -0.05%        (p=0.000 n=25+25)
Compiler       6.04M ± 0%      6.03M ± 0%   -0.11%        (p=0.000 n=25+25)

Change-Id: I2fda5e072db67ba239848bde827c7deb2ad4abae
Reviewed-on: https://go-review.googlesource.com/20813Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      f32161da
    • Aliaksandr Valialkin's avatar
      cmd/vet: improve detecting printf-like format argument · ee1b90ad
      Aliaksandr Valialkin authored 
      Previously format argument was detected via scanning func type args.
This didn't work when func type couldn't be determined if the func
is declared in the external package. Fall back to scanning for
the first string call argument in this case.

Fixes #14754

Change-Id: I571cc29684cc641bc87882002ef474cf1481e9e2
Reviewed-on: https://go-review.googlesource.com/21023
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarRob Pike <r@golang.org>
      ee1b90ad
    • Michael Munday's avatar
      debug/elf: add s390x relocations · 12fb62a5
      Michael Munday authored 
      Change-Id: I8440f69c7f99d65b2f69035c26b4a62104f22bd3
Reviewed-on: https://go-review.googlesource.com/20874Reviewed-by: default avatarMinux Ma <minux@golang.org>
      12fb62a5
    • Marvin Stenger's avatar
      all: use &^ operator if possible · d0fb6497
      Marvin Stenger authored 
      This is a change improving consistency in the source tree.
The pattern foo &= ^bar, was only used six times in src/ directory.
The usage of the supported &^ (bit clear / AND NOT) operator is way more
common, about factor 10x.

Change-Id: If26a2994fd81d23d42189bee00245eb84e672cf3
Reviewed-on: https://go-review.googlesource.com/21224Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      d0fb6497
    • Alexandre Cesaro's avatar
      mime: fix maximum length of encoded-words · d733cef7
      Alexandre Cesaro authored 
      RFC 2047 recommends a maximum length of 75 characters for
encoded-words. Due to a bug, encoded-words were limited to 77
characters instead of 75.

Change-Id: I2ff9d013ab922df6fd542464ace70b1c46dc7ae7
Reviewed-on: https://go-review.googlesource.com/20918Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      d733cef7
    • Shahar Kohanim's avatar
      cmd/link: remove some more dead fields from Pcln · 1b6402ea
      Shahar Kohanim authored 
      Change-Id: Ibb98de29d84a605fb1588c7dc11ad66e3965a137
Reviewed-on: https://go-review.googlesource.com/21223Reviewed-by: default avatarMichael Hudson-Doyle <michael.hudson@canonical.com>
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
      1b6402ea
    • Klaus Post's avatar
      compress/flate: add pure huffman deflater · 42ad1dc0
      Klaus Post authored 
      Add a "HuffmanOnly" compression level, where the input is
only entropy encoded.

The output is fully inflate compatible. Typical compression
is reduction is about 50% of typical level 1 compression, however
the compression time is very stable, and does not vary as much as
nearly as much level 1 compression (or Snappy).

This mode is useful for:
 * HTTP compression in a CPU limited environment.
 * Entropy encoding Snappy compressed data, for archiving, etc.
 * Compression where compression time needs to be predictable.
 * Fast network transfer.

Snappy "usually" performs inbetween this and level 1 compression-wise,
but at the same speed as "Huffman", so this is not a replacement,
but a good supplement for Snappy, since it usually can compress
Snappy output further.

This is implemented as level -2, since this would be too much of a
compression reduction to replace level 1.

>go test -bench=Encode -cpu=1
BenchmarkEncodeDigitsHuffman1e4            30000             52334 ns/op         191.08 MB/s
BenchmarkEncodeDigitsHuffman1e5             3000            518343 ns/op         192.92 MB/s
BenchmarkEncodeDigitsHuffman1e6              300           5356884 ns/op         186.68 MB/s
BenchmarkEncodeDigitsSpeed1e4               5000            324214 ns/op          30.84 MB/s
BenchmarkEncodeDigitsSpeed1e5                500           3952614 ns/op          25.30 MB/s
BenchmarkEncodeDigitsSpeed1e6                 30          40760350 ns/op          24.53 MB/s
BenchmarkEncodeDigitsDefault1e4             5000            387056 ns/op          25.84 MB/s
BenchmarkEncodeDigitsDefault1e5              300           5950614 ns/op          16.80 MB/s
BenchmarkEncodeDigitsDefault1e6               20          63842195 ns/op          15.66 MB/s
BenchmarkEncodeDigitsCompress1e4            5000            391859 ns/op          25.52 MB/s
BenchmarkEncodeDigitsCompress1e5             300           5707112 ns/op          17.52 MB/s
BenchmarkEncodeDigitsCompress1e6              20          59839465 ns/op          16.71 MB/s
BenchmarkEncodeTwainHuffman1e4             20000             73498 ns/op         136.06 MB/s
BenchmarkEncodeTwainHuffman1e5              2000            595892 ns/op         167.82 MB/s
BenchmarkEncodeTwainHuffman1e6               200           6059016 ns/op         165.04 MB/s
BenchmarkEncodeTwainSpeed1e4                5000            321212 ns/op          31.13 MB/s
BenchmarkEncodeTwainSpeed1e5                 500           2823873 ns/op          35.41 MB/s
BenchmarkEncodeTwainSpeed1e6                  50          27237864 ns/op          36.71 MB/s
BenchmarkEncodeTwainDefault1e4              3000            454634 ns/op          22.00 MB/s
BenchmarkEncodeTwainDefault1e5               200           6859537 ns/op          14.58 MB/s
BenchmarkEncodeTwainDefault1e6                20          71547405 ns/op          13.98 MB/s
BenchmarkEncodeTwainCompress1e4             3000            462307 ns/op          21.63 MB/s
BenchmarkEncodeTwainCompress1e5              200           7534992 ns/op          13.27 MB/s
BenchmarkEncodeTwainCompress1e6               20          80353365 ns/op          12.45 MB/s
PASS
ok      compress/flate  55.333s

Change-Id: I8e12ad13220e50d4cf7ddba6f292333efad61b0c
Reviewed-on: https://go-review.googlesource.com/20982Reviewed-by: default avatarJoe Tsai <joetsai@digital-static.net>
Reviewed-by: default avatarNigel Tao <nigeltao@golang.org>
      42ad1dc0
    • Brad Fitzpatrick's avatar
      net/http/cgi: allow CGI host to configure where child's stderr goes · 45d334ec
      Brad Fitzpatrick authored 
      Patch originally from Steven Hartland. Tweaked a bit & added a test.

Fixes #7197

Change-Id: I09012b4674e7c641dba31a24e9758cedb898d3ee
Reviewed-on: https://go-review.googlesource.com/21196Reviewed-by: default avatarAndrew Gerrand <adg@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
      45d334ec
    • Josh Bleecher Snyder's avatar
      cmd/compile: encapsulate map value type · 093a9a1f
      Josh Bleecher Snyder authored 
      Passes toolstash -cmp.

Change-Id: I83af544974e1e91e0810e13321afb3e665dcdf12
Reviewed-on: https://go-review.googlesource.com/21248
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      093a9a1f
    • Josh Bleecher Snyder's avatar
      cmd/compile: use t.Key() instead of t.Down · bf5f24b9
      Josh Bleecher Snyder authored 
      This was the only unconverted instance.

Change-Id: Ic0ba75824614fcd1e055316e62e26acd06801dd1
Reviewed-on: https://go-review.googlesource.com/21247
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      bf5f24b9
    • Alex Brainman's avatar
      path/filepath: use fsutil with TestEvalSymlinksCanonicalNames · 98047376
      Alex Brainman authored 
      TestEvalSymlinksCanonicalNames fails on system where 8dot3 name creation
is disabled. Add new test that temporarily changes 8dot3 name creation
file system setting and runs TestEvalSymlinksCanonicalNames under that
setting. New test requires administrator access and modifies important
file system setting, so don't run the test unless explicitly requested
by specifying new test flag.

Updates #13980

Change-Id: I598b5b956e6bd0ed556e79d350cb244808c89c0b
Reviewed-on: https://go-review.googlesource.com/20863Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
      98047376
    • Matthew Dempsky's avatar
      cmd/compile: fix plan9-amd64 build · da19a0cf
      Matthew Dempsky authored 
      The previous rules to combine indexed loads produced addresses like:

    From: obj.Addr{
        Type:   TYPE_MEM,
        Reg:    REG_CX,
        Name:   NAME_AUTO,
        Offset: 121,
        ...
    }

which are erroneous because NAME_AUTO implies a base register of
REG_SP, and cmd/internal/obj/x86 makes many assumptions to this
effect.  Note that previously we were also producing an extra "ADDQ
SP, CX" instruction, so indexing off of SP was already handled.

The approach taken by this CL to address the problem is to instead
produce addresses like:

    From: obj.Addr{
        Type:   TYPE_MEM,
        Reg:    REG_SP,
        Name:   NAME_AUTO,
        Offset: 121,
        Index:  REG_CX,
        Scale:  1,
    }

and to omit the "ADDQ SP, CX" instruction.

Downside to this approach is it requires adding a lot of new
MOV[WLQ]loadidx1 instructions that nearly duplicate functionality of
the existing MOV[WLQ]loadidx[248] instructions, but with a different
Scale.

Fixes #15001.

Change-Id: Iad9a1a41e5e2552f8d22e3ba975e4ea0862dffd2
Reviewed-on: https://go-review.googlesource.com/21245
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
      da19a0cf
    • Michel Lespinasse's avatar
      cmd/compile: optimize remaining convT2I calls · 859b63cc
      Michel Lespinasse authored 
      See #14874
Updates #6853

This change adds a compiler optimization for non pointer shaped convT2I.
Since itab symbols are now emitted by the compiler, the itab address can
be passed directly to convT2I instead of passing the iface type and a
cache pointer argument.

Compilebench results for the 5-commits series ending here:

name       old time/op     new time/op     delta
Template       336ms ± 4%      344ms ± 4%   +2.61%          (p=0.027 n=9+8)
Unicode        165ms ± 6%      173ms ± 7%   +5.11%          (p=0.014 n=9+9)
GoTypes        1.09s ± 1%      1.06s ± 2%   -3.29%          (p=0.000 n=9+9)
Compiler       5.09s ±10%      4.75s ±10%   -6.64%        (p=0.011 n=10+10)
MakeBash       31.1s ± 5%      30.3s ± 3%     ~           (p=0.089 n=10+10)

name       old text-bytes  new text-bytes  delta
HelloSize       558k ± 0%       558k ± 0%   +0.02%        (p=0.000 n=10+10)
CmdGoSize      6.24M ± 0%      6.11M ± 0%   -2.11%        (p=0.000 n=10+10)

name       old data-bytes  new data-bytes  delta
HelloSize      3.66k ± 0%      3.74k ± 0%   +2.41%        (p=0.000 n=10+10)
CmdGoSize       134k ± 0%       162k ± 0%  +20.76%        (p=0.000 n=10+10)

name       old bss-bytes   new bss-bytes   delta
HelloSize       126k ± 0%       126k ± 0%     ~     (all samples are equal)
CmdGoSize       149k ± 0%       146k ± 0%   -2.17%        (p=0.000 n=10+10)

name       old exe-bytes   new exe-bytes   delta
HelloSize       924k ± 0%       924k ± 0%   +0.05%        (p=0.000 n=10+10)
CmdGoSize      9.77M ± 0%      9.62M ± 0%   -1.47%        (p=0.000 n=10+10)

Change-Id: Ib230ddc04988824035c32287ae544a965fedd344
Reviewed-on: https://go-review.googlesource.com/20902Reviewed-by: default avatarKeith Randall <khr@golang.org>
Reviewed-by: default avatarDavid Crawshaw <crawshaw@golang.org>
Run-TryBot: Michel Lespinasse <walken@google.com>
      859b63cc
    • Michel Lespinasse's avatar
      cmd/compile: optimize convT2I as a two-word copy when T is pointer-shaped · 7427f2c4
      Michel Lespinasse authored 
      See #14874

This change adds a compiler optimization for pointer shaped convT2I.
Since itab symbols are now emitted by the compiler, the itab address can
be directly moved into the iface structure.

Change-Id: I311483af544519ca682c5f872960717ead772f26
Reviewed-on: https://go-review.googlesource.com/20901Reviewed-by: default avatarKeith Randall <khr@golang.org>
Reviewed-by: default avatarDavid Crawshaw <crawshaw@golang.org>
      7427f2c4
    • Michel Lespinasse's avatar
      cmd/link: collect itablinks as a slice in moduledata · 79688ca5
      Michel Lespinasse authored 
      See #14874

This change tells the linker to collect all the itablink symbols and
collect them so that moduledata can have a slice of all compiler
generated itabs.

The logic is shamelessly adapted from what is done with typelink symbols.

Change-Id: Ie93b59acf0fcba908a876d506afbf796f222dbac
Reviewed-on: https://go-review.googlesource.com/20889Reviewed-by: default avatarKeith Randall <khr@golang.org>
      79688ca5
    • Michel Lespinasse's avatar
      cmd/compile: emit itabs and itablinks · f00bbd5f
      Michel Lespinasse authored 
      See #14874

This change tells the compiler to emit itab and itablink symbols in
situations where they could be useful; however the compiled code does
not actually make use of the new symbols yet.

Change-Id: I0db3e6ec0cb1f3b7cebd4c60229e4a48372fe586
Reviewed-on: https://go-review.googlesource.com/20888Reviewed-by: default avatarDavid Crawshaw <crawshaw@golang.org>
Run-TryBot: Michel Lespinasse <walken@google.com>
      f00bbd5f
    • Michel Lespinasse's avatar
      runtime: insert itabs into hash table during init · 7043d2bb
      Michel Lespinasse authored 
      See #14874

This change makes the runtime register all compiler generated itabs
(as obtained from the moduledata) during init.

Change-Id: I9969a0985b99b8bda820a631f7fe4c78f1174cdf
Reviewed-on: https://go-review.googlesource.com/20900Reviewed-by: default avatarKeith Randall <khr@golang.org>
Run-TryBot: Michel Lespinasse <walken@google.com>
      7043d2bb
    • Matthew Dempsky's avatar
      cmd/compile: remove unused write barrier helpers · deb83d06
      Matthew Dempsky authored 
      These have been unused since CL 10316.

Passes toolstash -cmp.

Change-Id: Icc19f3fcc7275fbee1c665f704e10a110ecce2a5
Reviewed-on: https://go-review.googlesource.com/21242Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: default avatarAustin Clements <austin@google.com>
      deb83d06
    • Josh Bleecher Snyder's avatar
      cmd/compile: encapsulate Type.Argwid · 361b334c
      Josh Bleecher Snyder authored 
      Passes toolstash -cmp.

Change-Id: I72fb271052e449a83adfa9bd3b923d40781d6341
Reviewed-on: https://go-review.googlesource.com/21243
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      361b334c
    • Richard Miller's avatar
      syscall: fix accidental close of exec status pipe in StartProcess · 1f0bebcc
      Richard Miller authored 
      In syscall.forkAndExecInChild, blocks of code labelled Pass 1
and Pass 2 permute the file descriptors (if necessary) which are
passed to the child process.  If Pass 1 begins with fds = {0,2,1},
nextfd = 4 and pipe = 4, then the statement labelled "don't stomp
on pipe" is too late -- the pipe (which will be needed to pass
exec status back to the parent) will have been closed by the
preceding DUP call.

Moving the "don't stomp" test earlier ensures that the pipe is
protected.

Fixes #14979

Change-Id: I890c311527f6aa255be48b3277c1e84e2049ee22
Reviewed-on: https://go-review.googlesource.com/21184
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: default avatarDavid du Colombier <0intro@gmail.com>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      1f0bebcc
  5. 28 Mar, 2016 15 commits
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