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Commit Graph

10739 Commits

Author SHA1 Message Date
Marvin Stenger
88ced02190 cmd/dist: use bytes.Buffer for code generation
This belongs to a series of clean-up changes (see below) for cmd/dist.
This is change (8).

These changes include:
(1)  apply minor fixes
(2)  restore behavior of branchtag
(3)  unleash bootstrap optimization for windows
(4)  use standard generated code header
(5)  remove trivial variables + functions
(6)  move functions for the better
(7)  simplify code segments
(8)  use bytes.Buffer for code generation
(9)  rename variables + functions
(10) remove doc.go

Change-Id: I2d5a071eb8e14690325612271432fdc5f43b108b
Reviewed-on: https://go-review.googlesource.com/61014
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-20 03:48:42 +00:00
Hiroshi Ioka
822f832d29 cmd/nm: add test case for go archives
Also, rename some test cases, check (*os.File).Close

For #21706

Change-Id: Ie60c4d345b2259736c823dc6001c08affcdd86e7
Reviewed-on: https://go-review.googlesource.com/64510
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-20 03:46:41 +00:00
Marvin Stenger
3844e707f6 cmd/dist: simplify code segments
This belongs to a series of clean-up changes (see below) for cmd/dist.
This is change (7).

These changes include:
(1)  apply minor fixes
(2)  restore behavior of branchtag
(3)  unleash bootstrap optimization for windows
(4)  use standard generated code header
(5)  remove trivial variables + functions
(6)  move functions for the better
(7)  simplify code segments
(8)  use bytes.Buffer for code generation
(9)  rename variables + functions
(10) remove doc.go

Change-Id: Ia3c33ef060b4baaef354b729ba82ed0b28e52857
Reviewed-on: https://go-review.googlesource.com/61013
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-20 01:16:36 +00:00
Sam Whited
c174e46ae9 cmd/vet: don't warn on expected space in XML tag
The change in https://golang.org/cl/43295 added warning about spaces in
struct tags. However, in XML tags it is expected that there will be a
space between the namespace and the local name.

Change-Id: Ic31c3bdae30797f406f25c737b83bbe2de1ed1db
Reviewed-on: https://go-review.googlesource.com/62570
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2017-09-20 00:51:34 +00:00
Keith Randall
1787ced894 cmd/compile: remove Symbol wrappers from Aux fields
We used to have {Arg,Auto,Extern}Symbol structs with which we wrapped
a *gc.Node or *obj.LSym before storing them in the Aux field
of an ssa.Value.  This let the SSA part of the compiler distinguish
between autos and args, for example.  We no longer need the wrappers
as we can query the underlying objects directly.

There was also some sloppy usage, where VarDef had a *gc.Node
directly in its Aux field, whereas the use of that variable had
that *gc.Node wrapped in an AutoSymbol. Thus the Aux fields didn't
match (using ==) when they probably should.
This sloppy usage cleanup is the only thing in the CL that changes the
generated code - we can get rid of some more unused auto variables if
the matching happens reliably.

Removing this wrapper also lets us get rid of the varsyms cache
(which was used to prevent wrapping the same *gc.Node twice).

Change-Id: I0dedf8f82f84bfee413d310342b777316bd1d478
Reviewed-on: https://go-review.googlesource.com/64452
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-09-19 22:03:10 +00:00
Matthew Dempsky
7c8a9615c0 cmd/compile: fix stack frame info for calls in receiver slot
Previously, after inlining a call, we made a second pass to rewrite
the AST's position information to record the inlined stack frame. The
call arguments were part of this AST, but it would be incorrect to
rewrite them too, so extra effort was made to temporarily remove them
while the position rewriting was done.

However, this extra logic was only done for regular arguments: it was
not done for receiver arguments. Consequently if m was inlined in
"f().m(g(), h())", g and h would have correct call frames, but f would
appear to be called by m.

The fix taken by this CL is to merge setpos into inlsubst and only
rewrite position information for nodes that were actually copied from
the original function AST body. As a side benefit, this eliminates an
extra AST pass and some AST walking code.

Fixes #21879.

Change-Id: I22b25c208313fc25c358d3a2eebfc9b012400084
Reviewed-on: https://go-review.googlesource.com/64470
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2017-09-19 18:35:24 +00:00
Bryan C. Mills
f2a5ed852b cmd/cgo: use a named type to indicate syntactic context
We previously used bare strings, which made it difficult to see (and
to cross-reference) the set of allowed context values.

This change is purely cosmetic, but makes it easier for me to
understand how to address #21878.

updates #21878

Change-Id: I9027d94fd5997a0fe857c0055dea8719e1511f03
Reviewed-on: https://go-review.googlesource.com/63830
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-19 18:22:10 +00:00
Matthew Dempsky
3066dbad52 cmd/compile: cleanup toolstash pacifier from OXFALL removal
Change-Id: Ide7fe6b09247b7a6befbdfc2d6ce5988aa1df323
Reviewed-on: https://go-review.googlesource.com/61131
Reviewed-by: Robert Griesemer <gri@golang.org>
2017-09-19 18:20:29 +00:00
Matthew Dempsky
4347baac7d cmd/compile: eliminate OXFALL
Previously, we used OXFALL vs OFALL to distinguish fallthrough
statements that had been validated. Because in the Node AST we flatten
statement blocks, OXCASE and OXFALL needed to keep track of their
block scopes for this purpose.

Now that we have an AST that keeps these separate, we can just perform
the validation earlier.

Passes toolstash-check.

Fixes #14540.

Change-Id: I8421eaba16c2b3b72c9c5483b5cf20b14261385e
Reviewed-on: https://go-review.googlesource.com/61130
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2017-09-19 18:08:50 +00:00
Hiroshi Ioka
c100a0f668 cmd/dist: test: use existing globals rather than environment variables
Change-Id: Ief6bad2d15461d455e7230eadd9b42b27d04ec8b
Reviewed-on: https://go-review.googlesource.com/64630
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-19 14:56:08 +00:00
Hiroshi Ioka
0bbb6665d8 cmd/go: fix file leak in TestBuildmodePIE
Change-Id: Ifeb93f6dc75fb5f90d595211fb0f97a89bf74526
Reviewed-on: https://go-review.googlesource.com/64530
Reviewed-by: Dave Cheney <dave@cheney.net>
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-19 08:58:10 +00:00
Tobias Klauser
8bdf0b72b0 cmd/compile: simplify range expression
Found by running gofmt -s on the file in question.

Change-Id: I84511bd2bc75dff196930a7a87ecf5a2aca2fbb8
Reviewed-on: https://go-review.googlesource.com/64310
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-19 00:29:58 +00:00
Matthew Dempsky
bb2f0da23a cmd/compile: fix compiler crash on recursive types
By setting both a valid size and alignment for broken recursive types,
we can appease some more safety checks and prevent compiler crashes.

Fixes #21882.

Change-Id: Ibaa137d8aa2c2a9d521462f144d7016c4abfd6e7
Reviewed-on: https://go-review.googlesource.com/64430
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2017-09-18 21:49:43 +00:00
Damien Lespiau
1e607f225e cmd/internal/obj/x86: add ADDSUBPS/PD
These are the last instructions missing to complete SSE3 support.

For reference what was missing was found by a tool [1]:

$ x86db-gogen list --extension SSE3 --not-known
ADDSUBPD xmmreg,xmmrm [rm: 66 0f d0 /r] PRESCOTT,SSE3,SO
ADDSUBPS xmmreg,xmmrm [rm: f2 0f d0 /r] PRESCOTT,SSE3,SO

[1] https://github.com/dlespiau/x86db

Fixes #20293

Change-Id: Ib5a91bf64dcc5282cdb60eae740ae52b4db16ebd
Reviewed-on: https://go-review.googlesource.com/42990
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>
2017-09-18 15:06:05 +00:00
Daniel Martí
71c9454f99 cmd/compile: remove some redundant types in decls
As per golint's suggestions.

Change-Id: Ie0c6ad9aa5dc69966a279562a341c7b095c47ede
Reviewed-on: https://go-review.googlesource.com/64192
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-17 09:51:38 +00:00
Michael Munday
a5d6b41449 cmd/compile: test constant folded integer to/from float conversions
Improves test coverage of the rules added in CL 63795 and would have
detected the bug fixed by CL 63950.

Change-Id: I107ee8d8e0b6684ce85b2446bd5018c5a03d608a
Reviewed-on: https://go-review.googlesource.com/64130
Reviewed-by: Keith Randall <khr@golang.org>
2017-09-16 09:17:58 +00:00
Ben Shi
a07176b45a cmd/compile: optimize ARM code with MULAF/MULSF/MULAD/MULSD
The go compiler can generate better ARM code with those more
efficient FP instructions. And there is little improvement
in total but big improvement in special cases.

1. The size of pkg/linux_arm/math.a shrinks by 2.4%.

2. there is neither improvement nor regression in compilecmp benchmark.
name        old time/op       new time/op       delta
Template          2.32s ± 2%        2.32s ± 1%    ~     (p=1.000 n=9+10)
Unicode           1.32s ± 4%        1.32s ± 4%    ~     (p=0.912 n=10+10)
GoTypes           7.76s ± 1%        7.79s ± 1%    ~     (p=0.447 n=9+10)
Compiler          37.4s ± 2%        37.2s ± 2%    ~     (p=0.218 n=10+10)
SSA               84.8s ± 2%        85.0s ± 1%    ~     (p=0.604 n=10+9)
Flate             1.45s ± 2%        1.44s ± 2%    ~     (p=0.075 n=10+10)
GoParser          1.82s ± 1%        1.81s ± 1%    ~     (p=0.190 n=10+10)
Reflect           5.06s ± 1%        5.05s ± 1%    ~     (p=0.315 n=10+9)
Tar               2.37s ± 1%        2.37s ± 2%    ~     (p=0.912 n=10+10)
XML               2.56s ± 1%        2.58s ± 2%    ~     (p=0.089 n=10+10)
[Geo mean]        4.77s             4.77s       -0.08%

name        old user-time/op  new user-time/op  delta
Template          2.74s ± 2%        2.75s ± 2%    ~     (p=0.856 n=9+10)
Unicode           1.61s ± 4%        1.62s ± 3%    ~     (p=0.693 n=10+10)
GoTypes           9.55s ± 1%        9.49s ± 2%    ~     (p=0.056 n=9+10)
Compiler          45.9s ± 1%        45.8s ± 1%    ~     (p=0.345 n=9+10)
SSA                110s ± 1%         110s ± 1%    ~     (p=0.763 n=9+10)
Flate             1.68s ± 2%        1.68s ± 3%    ~     (p=0.616 n=10+10)
GoParser          2.14s ± 4%        2.14s ± 1%    ~     (p=0.825 n=10+9)
Reflect           5.95s ± 1%        5.97s ± 3%    ~     (p=0.951 n=9+10)
Tar               2.94s ± 3%        2.93s ± 2%    ~     (p=0.359 n=10+10)
XML               3.03s ± 3%        3.07s ± 6%    ~     (p=0.166 n=10+10)
[Geo mean]        5.76s             5.77s       +0.12%

name        old text-bytes    new text-bytes    delta
HelloSize         588kB ± 0%        588kB ± 0%    ~     (all equal)

name        old data-bytes    new data-bytes    delta
HelloSize        5.46kB ± 0%       5.46kB ± 0%    ~     (all equal)

name        old bss-bytes     new bss-bytes     delta
HelloSize        72.9kB ± 0%       72.9kB ± 0%    ~     (all equal)

name        old exe-bytes     new exe-bytes     delta
HelloSize        1.03MB ± 0%       1.03MB ± 0%    ~     (all equal)

3. The performance of Mandelbrot200 improves 15%, though little
   improvement in total.
name                     old time/op    new time/op    delta
BinaryTree17-4              41.7s ± 1%     41.7s ± 1%     ~     (p=0.264 n=29+23)
Fannkuch11-4                24.2s ± 0%     24.1s ± 1%   -0.13%  (p=0.050 n=30+30)
FmtFprintfEmpty-4           826ns ± 1%     824ns ± 1%   -0.24%  (p=0.038 n=25+30)
FmtFprintfString-4         1.38µs ± 1%    1.38µs ± 0%   -0.42%  (p=0.000 n=27+25)
FmtFprintfInt-4            1.46µs ± 1%    1.46µs ± 0%     ~     (p=0.060 n=30+23)
FmtFprintfIntInt-4         2.11µs ± 1%    2.08µs ± 0%   -1.04%  (p=0.000 n=30+30)
FmtFprintfPrefixedInt-4    2.23µs ± 1%    2.22µs ± 1%   -0.51%  (p=0.000 n=30+30)
FmtFprintfFloat-4          4.49µs ± 1%    4.48µs ± 1%   -0.22%  (p=0.004 n=26+30)
FmtManyArgs-4              8.06µs ± 1%    8.12µs ± 1%   +0.68%  (p=0.000 n=25+30)
GobDecode-4                 104ms ± 1%     104ms ± 2%     ~     (p=0.362 n=29+29)
GobEncode-4                92.9ms ± 1%    92.8ms ± 2%     ~     (p=0.786 n=30+30)
Gzip-4                      4.12s ± 1%     4.12s ± 1%     ~     (p=0.314 n=30+30)
Gunzip-4                    602ms ± 1%     603ms ± 1%     ~     (p=0.164 n=30+30)
HTTPClientServer-4          659µs ± 1%     655µs ± 2%   -0.64%  (p=0.006 n=25+28)
JSONEncode-4                234ms ± 1%     235ms ± 1%   +0.29%  (p=0.050 n=30+30)
JSONDecode-4                912ms ± 0%     911ms ± 0%     ~     (p=0.385 n=18+24)
Mandelbrot200-4            49.2ms ± 0%    41.7ms ± 0%  -15.35%  (p=0.000 n=25+27)
GoParse-4                  46.3ms ± 1%    46.3ms ± 2%     ~     (p=0.572 n=30+30)
RegexpMatchEasy0_32-4      1.29µs ± 1%    1.27µs ± 0%   -1.59%  (p=0.000 n=30+30)
RegexpMatchEasy0_1K-4      7.62µs ± 4%    7.71µs ± 3%     ~     (p=0.074 n=30+30)
RegexpMatchEasy1_32-4      1.31µs ± 0%    1.30µs ± 1%   -0.71%  (p=0.000 n=23+30)
RegexpMatchEasy1_1K-4      10.3µs ± 3%    10.3µs ± 5%     ~     (p=0.105 n=30+30)
RegexpMatchMedium_32-4     2.06µs ± 1%    2.06µs ± 1%     ~     (p=0.100 n=30+30)
RegexpMatchMedium_1K-4      533µs ± 1%     534µs ± 1%     ~     (p=0.254 n=29+30)
RegexpMatchHard_32-4       28.9µs ± 0%    28.9µs ± 0%     ~     (p=0.154 n=30+30)
RegexpMatchHard_1K-4        868µs ± 1%     867µs ± 0%     ~     (p=0.729 n=30+23)
Revcomp-4                  66.9ms ± 1%    67.2ms ± 2%     ~     (p=0.102 n=28+29)
Template-4                  1.07s ± 1%     1.06s ± 1%   -0.53%  (p=0.000 n=30+30)
TimeParse-4                7.07µs ± 1%    7.01µs ± 0%   -0.85%  (p=0.000 n=30+25)
TimeFormat-4               13.1µs ± 0%    13.2µs ± 1%   +0.77%  (p=0.000 n=27+27)
[Geo mean]                  721µs          716µs        -0.70%

name                     old speed      new speed      delta
GobDecode-4              7.38MB/s ± 1%  7.37MB/s ± 2%     ~     (p=0.399 n=29+29)
GobEncode-4              8.26MB/s ± 1%  8.27MB/s ± 2%     ~     (p=0.790 n=30+30)
Gzip-4                   4.71MB/s ± 1%  4.71MB/s ± 1%     ~     (p=0.885 n=30+30)
Gunzip-4                 32.2MB/s ± 1%  32.2MB/s ± 1%     ~     (p=0.190 n=30+30)
JSONEncode-4             8.28MB/s ± 1%  8.25MB/s ± 1%     ~     (p=0.053 n=30+30)
JSONDecode-4             2.13MB/s ± 0%  2.12MB/s ± 1%     ~     (p=0.072 n=18+30)
GoParse-4                1.25MB/s ± 1%  1.25MB/s ± 2%     ~     (p=0.863 n=30+30)
RegexpMatchEasy0_32-4    24.8MB/s ± 0%  25.2MB/s ± 1%   +1.61%  (p=0.000 n=30+30)
RegexpMatchEasy0_1K-4     134MB/s ± 4%   133MB/s ± 3%     ~     (p=0.074 n=30+30)
RegexpMatchEasy1_32-4    24.5MB/s ± 0%  24.6MB/s ± 1%   +0.72%  (p=0.000 n=23+30)
RegexpMatchEasy1_1K-4    99.1MB/s ± 3%  99.8MB/s ± 5%     ~     (p=0.105 n=30+30)
RegexpMatchMedium_32-4    483kB/s ± 1%   487kB/s ± 1%   +0.83%  (p=0.002 n=30+30)
RegexpMatchMedium_1K-4   1.92MB/s ± 1%  1.92MB/s ± 1%     ~     (p=0.058 n=30+30)
RegexpMatchHard_32-4     1.10MB/s ± 0%  1.11MB/s ± 0%     ~     (p=0.804 n=30+30)
RegexpMatchHard_1K-4     1.18MB/s ± 0%  1.18MB/s ± 0%     ~     (all equal)
Revcomp-4                38.0MB/s ± 1%  37.8MB/s ± 2%     ~     (p=0.098 n=28+29)
Template-4               1.82MB/s ± 1%  1.83MB/s ± 1%   +0.55%  (p=0.000 n=29+29)
[Geo mean]               6.79MB/s       6.79MB/s        +0.09%

Change-Id: Ia91991c2c5c59c5df712de85a83b13a21c0a554b
Reviewed-on: https://go-review.googlesource.com/63770
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-09-15 22:30:34 +00:00
isharipo
8c67f210a1 cmd/internal/obj: change Prog.From3 to RestArgs ([]Addr)
This change makes it easier to express instructions
with arbitrary number of operands.

Rationale: previous approach with operand "hiding" does
not scale well, AVX and especially AVX512 have many
instructions with 3+ operands.

x86 asm backend is updated to handle up to 6 explicit operands.
It also fixes issue with 4-th immediate operand type checks.
All `ytab` tables are updated accordingly.

Changes to non-x86 backends only include these patterns:
`p.From3 = X` => `p.SetFrom3(X)`
`p.From3.X = Y` => `p.GetFrom3().X = Y`

Over time, other backends can adapt Prog.RestArgs
and reduce the amount of workarounds.

-- Performance --

x/benchmark/build:

$ benchstat upstream.bench patched.bench
name      old time/op                 new time/op                 delta
Build-48                  21.7s ± 2%                  21.8s ± 2%   ~     (p=0.218 n=10+10)

name      old binary-size             new binary-size             delta
Build-48                  10.3M ± 0%                  10.3M ± 0%   ~     (all equal)

name      old build-time/op           new build-time/op           delta
Build-48                  21.7s ± 2%                  21.8s ± 2%   ~     (p=0.218 n=10+10)

name      old build-peak-RSS-bytes    new build-peak-RSS-bytes    delta
Build-48                  145MB ± 5%                  148MB ± 5%   ~     (p=0.218 n=10+10)

name      old build-user+sys-time/op  new build-user+sys-time/op  delta
Build-48                  21.0s ± 2%                  21.2s ± 2%   ~     (p=0.075 n=10+10)

Microbenchmark shows a slight slowdown.

name        old time/op  new time/op  delta
AMD64asm-4  49.5ms ± 1%  49.9ms ± 1%  +0.67%  (p=0.001 n=23+15)

func BenchmarkAMD64asm(b *testing.B) {
  for i := 0; i < b.N; i++ {
    TestAMD64EndToEnd(nil)
    TestAMD64Encoder(nil)
  }
}

Change-Id: I4f1d37b5c2c966da3f2127705ccac9bff0038183
Reviewed-on: https://go-review.googlesource.com/63490
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-09-15 21:05:03 +00:00
Alessandro Arzilli
e1cf2be7a8 cmd/compile: fix lexical block of captured variables
Variables captured by a closure were always assigned to the root scope
in their declaration function. Using decl.Name.Defn.Pos will result in
the correct scope for both the declaration function and the capturing
function.

Fixes #21515

Change-Id: I3960aface3c4fc97e15b36191a74a7bed5b5ebc1
Reviewed-on: https://go-review.googlesource.com/56830
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-09-15 21:02:59 +00:00
Matthew Dempsky
37fc70bac3 cmd/internal/objabi: remove unused flag funcs
Change-Id: I728c5606882ece949d58e86f9558fc16ae4ffd85
Reviewed-on: https://go-review.googlesource.com/64052
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-09-15 19:30:37 +00:00
Matthew Dempsky
f84a1db19f cmd/link: replace unrolled Cput loops with Cwrite/Cwritestring
Passes toolstash-check -all.

Change-Id: I1c85a2c0390517f4e9cdbddddbf3c353edca65b3
Reviewed-on: https://go-review.googlesource.com/64051
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-15 19:09:39 +00:00
David Crawshaw
27e80f7c4d cmd/compile: replace GOROOT in //line directives
The compiler replaces any path of the form /path/to/goroot/src/net/port.go
with GOROOT/src/net/port.go so that the same object file is
produced if the GOROOT is moved. It was skipping this transformation
for any absolute path into the GOROOT that came from //line directives,
such as those generated by cmd/cgo.

Fixes #21373
Fixes #21720
Fixes #21825

Change-Id: I2784c701b4391cfb92e23efbcb091a84957d61dd
Reviewed-on: https://go-review.googlesource.com/63693
Run-TryBot: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-09-15 17:18:43 +00:00
Todd Neal
af86083812 cmd/compile: fix typo in floating point rule
Change-Id: Idfb64fcb26f48d5b70bab872f9a3d96a036be681
Reviewed-on: https://go-review.googlesource.com/63950
Run-TryBot: Todd Neal <todd@tneal.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2017-09-15 03:07:43 +00:00
Kunpei Sakai
5a986eca86 all: fix article typos
a -> an

Change-Id: I7362bdc199e83073a712be657f5d9ba16df3077e
Reviewed-on: https://go-review.googlesource.com/63850
Reviewed-by: Rob Pike <r@golang.org>
2017-09-15 02:39:16 +00:00
Emmanuel Odeke
33cb1481f2 cmd/go: correctly report that -msan needs CGO_ENABLED=1
Previously, if CGO_ENABLED=0 was set when building
with -msan, the error message printed was:

  -race requires cgo; enable cgo by setting CGO_ENABLED=1

yet the instrumentation flag passed in was -msan. This CL
fixes that message to correctly report that -msan needed
CGO_ENABLED=1, and likewise if -race, report -race needed it.

Fixes #21895

Change-Id: If423d520daae7847fb38cc97c3192ada5d960f9d
Reviewed-on: https://go-review.googlesource.com/63930
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2017-09-15 00:11:18 +00:00
Michael Munday
95b146e8eb cmd/compile: improve floating point constant propagation
Add generic rules to propagate floating point constants through
comparisons and integer conversions. These new rules seldom trigger
in the standard library so there is no performance change, however
I think it is worth adding them anyway for completeness.

Change-Id: I9db5222746508a2996f1cafb72f4e0cf2541de07
Reviewed-on: https://go-review.googlesource.com/63795
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2017-09-14 23:08:33 +00:00
Lynn Boger
40e25895e3 cmd/compile,math: improve int<->float conversions on ppc64x
The functions Float64bits and Float64frombits perform
poorly on ppc64x because the int<->float conversions
often result in load and store sequences to handle the
type change. This patch adds more rules to recognize
those sequences and use register to register moves
and avoid unnecessary loads and stores where possible.

There were some existing rules to improve these conversions,
but this provides additional improvements. Included here:

- New instruction FCFIDS to improve on conversion to 32 bit
- Rename Xf2i64 and Xi2f64 as MTVSRD, MFVSRD, to match the asm
- Add rules to lower some of the load/store sequences for
- Added new go asm to ppc64.s testcase.
conversions

Improvements:

BenchmarkAbs-16                2.16          0.93          -56.94%
BenchmarkCopysign-16           2.66          1.18          -55.64%
BenchmarkRound-16              4.82          2.69          -44.19%
BenchmarkSignbit-16            1.71          1.14          -33.33%
BenchmarkFrexp-16              11.4          7.94          -30.35%
BenchmarkLogb-16               10.4          7.34          -29.42%
BenchmarkLdexp-16              15.7          11.2          -28.66%
BenchmarkIlogb-16              10.2          7.32          -28.24%
BenchmarkPowInt-16             69.6          55.9          -19.68%
BenchmarkModf-16               10.1          8.19          -18.91%
BenchmarkLog2-16               17.4          14.3          -17.82%
BenchmarkCbrt-16               45.0          37.3          -17.11%
BenchmarkAtanh-16              57.6          48.3          -16.15%
BenchmarkRemainder-16          76.6          65.4          -14.62%
BenchmarkGamma-16              26.0          22.5          -13.46%
BenchmarkPowFrac-16            197           174           -11.68%
BenchmarkMod-16                112           99.8          -10.89%
BenchmarkAsinh-16              59.9          53.7          -10.35%
BenchmarkAcosh-16              44.8          40.3          -10.04%

Updates #21390

Change-Id: I56cc991fc2e55249d69518d4e1ba76cc23904e35
Reviewed-on: https://go-review.googlesource.com/63290
Reviewed-by: Michael Munday <mike.munday@ibm.com>
2017-09-14 12:14:00 +00:00
Daniel Martí
f351dbfa4d cmd/compile: expand inlining test to multiple pkgs
Rework the test to work with any number of std packages. This was done
to include a few funcs from unicode/utf8. Adding more will be much
simpler too.

While at it, add more runtime funcs by searching for "inlined" or
"inlining" in the git log of its directory. These are: addb, subtractb,
fastrand and noescape.

Updates #21851.

Change-Id: I4fb2bd8aa6a5054218f9b36cb19d897ac533710e
Reviewed-on: https://go-review.googlesource.com/63611
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-14 04:49:58 +00:00
zhongtao.chen
99414a5b1d cmd/compile: limit the number of simultaneously opened files to avoid EMFILE/ENFILE errors
If the Go packages with enough source files,it will cause EMFILE/ENFILE error,
Fix this by limiting the number of simultaneously opened files.

Fixes #21621

Change-Id: I8555d79242d2f90771e37e073b7540fc7194a64a
Reviewed-on: https://go-review.googlesource.com/57751
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-14 04:02:44 +00:00
Matthew Dempsky
c64e793850 cmd/compile: simplify exporting ONAME nodes
These two special cases are unnecessary:

1) "~b%d" references only appear during walk, to handle "return"
statements implicitly assigning to blank result parameters. Even if
they could appear, the "inlined and customized version" accidentally
diverged from p.sym in golang.org/cl/33911.

2) The Vargen case is already identical to the default case, and it
never overlaps with the remaining "T.method" case.

Passes toolstash-check.

Change-Id: I03f7e5b75b707b43afc8ed6eb90f43ba93ed17ae
Reviewed-on: https://go-review.googlesource.com/63272
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2017-09-13 22:07:35 +00:00
Matthew Dempsky
577967799c cmd/compile: simplify exporting OTYPE nodes
We only export packages that typechecked successfully, and OTYPE nodes
will always have their Type field set.

Changes the package export format, but only in the compiler-specific
section. No version bump necessary.

Change-Id: I722f5827e73948fceb0432bc8b3b22471fea8f61
Reviewed-on: https://go-review.googlesource.com/63273
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2017-09-13 18:31:16 +00:00
Daniel Martí
0d8a3b208c cmd/compile: add TestIntendedInlining from runtime
Move it from the runtime package, as we will soon add more packages and
functions for it to check.

The test used the testEnv func, which cleaned certain environment
variables from a command, so it was moved to internal/testenv under a
more descriptive (and less ambiguous) name. Add a simple godoc to it
too.

For #21851.

Change-Id: I6f39c1f23b45377718355fafe66ffd87047d8ab6
Reviewed-on: https://go-review.googlesource.com/63550
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>
2017-09-13 18:10:31 +00:00
Bryan C. Mills
d02477e994 misc/cgo/errors: port test.bash to Go
This makes the test easier to run in isolation and easier to change,
and simplifies the code to run the tests in parallel.

updates #13467

Change-Id: I5622b5cc98276970347da18e95d071dbca3c5cc1
Reviewed-on: https://go-review.googlesource.com/63276
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-13 17:45:52 +00:00
Martin Möhrmann
1d3ad6733e runtime: refactor hmap.extra.overflow array into two separate fields
This makes it easier to deduce from the field names which overflow
field corresponds to h.buckets and which to h.oldbuckets by aligning
the naming with the buckets fields in hmap.

Change-Id: I8d6a729229a190db0212bac012ead1a3c13cf5d0
Reviewed-on: https://go-review.googlesource.com/62411
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2017-09-13 06:43:01 +00:00
Wei Xiao
701d49245f cmd/vet: fix go vet on parentheses of assembly function flag
Current implementation doesn't recognize parentheses that may appear in flags
of assembly function as shown below:

	TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$24

It results in vet reporting false positives and a lot of whitelists are added
for suppressing the false alarms.

This CL fixes the issue and eliminates the redundant whitelists.

Change-Id: Idbc1b42965b31cea8ee7c23d1a6f62feb68e844c
Reviewed-on: https://go-review.googlesource.com/62850
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2017-09-13 03:18:07 +00:00
Bryan C. Mills
9f1a7192dc misc/cgo/test: set the traceback level instead of failing the test
Previously, test7978 failed if the user did not invoke it with
GOTRACEBACK=2 already set in their environment. Environment-sensitive
test are awkward, and in this case there is a very simple workaround:
set the traceback level to the necessary value explicitly.

Change-Id: I7d576f24138aa8a41392148eae11bbeaef558573
Reviewed-on: https://go-review.googlesource.com/63275
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-13 02:53:11 +00:00
Daniel Martí
6d33df1d65 cmd/compile: remove redundant switch label
This label was added automatically by grind to remove gotos. As of
today, it's completely useless, as none of its uses need a label to
begin with.

While at it, remove all the redundant breaks too. Leave those that are
the single statement in a case clause body, as that's the style used
throughout std and cmd to clarify when cases are empty.

Change-Id: I3e20068b66b759614e903beab1cc9b2709b31063
Reviewed-on: https://go-review.googlesource.com/62950
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-12 19:39:46 +00:00
Martin Möhrmann
137e4a6c63 cmd/compile: improve single blank variable handling in walkrange
Refactor walkrange to treat "for _ = range a" as "for range a".

This avoids generating some later discarded nodes in the compiler.

Passes toolstash -cmp.

Change-Id: Ifb2e1ca3b8519cbb67e8ad5aad514af9d18f1ec4
Reviewed-on: https://go-review.googlesource.com/61017
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2017-09-12 05:50:54 +00:00
Lynn Boger
e9cbabb334 cmd/link: enable -buildmode=plugin for ppc64le
This enables support for the buildmode plugin on
ppc64le.

Fixes #20756

Change-Id: I83241ff63f9b5c366fe0496cf46a3f67d75d08ac
Reviewed-on: https://go-review.googlesource.com/55850
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2017-09-11 21:20:38 +00:00
Daniel Martí
27a70ea560 cmd/compile: simplify a few early var declarations
These were likely written in C or added by an automated tool. Either
way, they're unnecessary now. Clean up the code.

Change-Id: I56de2c7bb60ebab8c500803a8b6586bdf4bf75c7
Reviewed-on: https://go-review.googlesource.com/62951
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 21:16:39 +00:00
Lynn Boger
fa3fe2e3c6 cmd/compile, math/bits: add rotate rules to PPC64.rules
This adds rules to match the code in math/bits RotateLeft,
RotateLeft32, and RotateLef64 to allow them to be inlined.

The rules are complicated because the code in these function
use different types, and the non-const version of these
shifts generate Mask and Carry instructions that become
subexpressions during the match process.

Also adds a testcase to asm_test.go.

Improvement in math/bits:

BenchmarkRotateLeft-16       1.57     1.32      -15.92%
BenchmarkRotateLeft32-16     1.60     1.37      -14.37%
BenchmarkRotateLeft64-16     1.57     1.32      -15.92%

Updates #21390

Change-Id: Ib6f17669ecc9cab54f18d690be27e2225ca654a4
Reviewed-on: https://go-review.googlesource.com/59932
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2017-09-11 20:44:22 +00:00
Joe Tsai
4768408e5f cmd/go: fix regexp
The regular expression "A-za-z" is most likely a typo and
the intent seems to be "A-Za-z" instead.

Using "A-z" matches certain characters like: [\]^_`

Updates #10010

Change-Id: If2d064c56ef613f2e46285d8d4e5998e83aed43a
Reviewed-on: https://go-review.googlesource.com/62910
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Run-TryBot: Matt Layher <mdlayher@gmail.com>
2017-09-11 19:59:43 +00:00
Alan Donovan
7159ab4871 cmd/vet: print: permit '#' flag in %e, %f, and %g
+ Test

Change-Id: I7b42ff70f26a58e1cf58cbbc53d02a65623456ae
Reviewed-on: https://go-review.googlesource.com/62371
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 18:11:48 +00:00
Lynn Boger
b74b43de68 cmd/compile: request r12 for indirect calls on ppc64le
On ppc64le, functions compiled with -shared expect r12 to
hold the function's address for indirect calls. Previously
this was enforced by generating a move instruction if the
address wasn't already in r12. This change avoids that extra
move by requesting r12 in the CALL ops that do indirect calls.

As a result of adding support for plugins on ppc64le, it was
discovered that there would be more cases where this extra
move was needed, so this seemed like a better solution.

Updates #20756

Change-Id: I6770885a46990f78c6d2902a715dcdaa822192a1
Reviewed-on: https://go-review.googlesource.com/62890
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-09-11 18:02:33 +00:00
Ben Shi
f727fa7939 cmd/internal/obj/arm: support more ARM VFP instructions
Add support of more ARM VFP instructions in the assembler.
They were introduced in ARM VFPv4.

"FMULAF/FMULAD   Fm, Fn, Fd": Fd = Fd + Fn*Fm
"FNMULAF/FNMULAD Fm, Fn, Fd": Fd = -(Fd + Fn*Fm)
"FMULSF/FMULSD   Fm, Fn, Fd": Fd = Fd - Fn*Fm
"FNMULSF/FNMULSD Fm, Fn, Fd": Fd = -(Fd - Fn*Fm)

The multiplication results are not rounded.

Change-Id: Id9cc52fd8e1b9a708103cd1e514c85a9e1cb3f47
Reviewed-on: https://go-review.googlesource.com/62550
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 13:10:50 +00:00
Ben Shi
2899c3e8cb cmd/compile: optimize ARM code with NMULF/NMULD
NMULF and NMULD are efficient FP instructions, and the go compiler can
use them to generate better code.

The benchmark tests of my patch did not show general change, but big
improvement in special cases.

1.A special test case improved 12.6%.
https://github.com/benshi001/ugo1/blob/master/fpmul_test.go
name                     old time/op    new time/op    delta
FPMul-4                     398µs ± 1%     348µs ± 1%  -12.64%  (p=0.000 n=40+40)

2. the compilecmp test showed little change.
name        old time/op       new time/op       delta
Template          2.30s ± 1%        2.31s ± 1%    ~     (p=0.754 n=17+19)
Unicode           1.31s ± 3%        1.32s ± 5%    ~     (p=0.265 n=20+20)
GoTypes           7.73s ± 2%        7.73s ± 1%    ~     (p=0.925 n=20+20)
Compiler          37.0s ± 1%        37.3s ± 2%  +0.79%  (p=0.002 n=19+20)
SSA               83.8s ± 4%        83.5s ± 2%    ~     (p=0.964 n=20+17)
Flate             1.43s ± 2%        1.44s ± 1%    ~     (p=0.602 n=20+20)
GoParser          1.82s ± 2%        1.81s ± 2%    ~     (p=0.141 n=19+20)
Reflect           5.08s ± 2%        5.08s ± 3%    ~     (p=0.835 n=20+19)
Tar               2.36s ± 1%        2.35s ± 1%    ~     (p=0.195 n=18+17)
XML               2.57s ± 2%        2.56s ± 1%    ~     (p=0.283 n=20+17)
[Geo mean]        4.74s             4.75s       +0.05%

name        old user-time/op  new user-time/op  delta
Template          2.75s ± 2%        2.75s ± 0%    ~     (p=0.620 n=20+15)
Unicode           1.59s ± 4%        1.60s ± 4%    ~     (p=0.479 n=20+19)
GoTypes           9.48s ± 1%        9.47s ± 1%    ~     (p=0.743 n=20+20)
Compiler          45.7s ± 1%        45.7s ± 1%    ~     (p=0.482 n=19+20)
SSA                109s ± 1%         109s ± 2%    ~     (p=0.800 n=18+20)
Flate             1.67s ± 3%        1.67s ± 3%    ~     (p=0.598 n=19+18)
GoParser          2.15s ± 4%        2.13s ± 3%    ~     (p=0.153 n=20+20)
Reflect           5.95s ± 2%        5.95s ± 2%    ~     (p=0.961 n=19+20)
Tar               2.93s ± 2%        2.92s ± 3%    ~     (p=0.242 n=20+19)
XML               3.02s ± 3%        3.04s ± 3%    ~     (p=0.233 n=19+18)
[Geo mean]        5.74s             5.74s       -0.04%

name        old text-bytes    new text-bytes    delta
HelloSize         588kB ± 0%        588kB ± 0%    ~     (all equal)

name        old data-bytes    new data-bytes    delta
HelloSize        5.46kB ± 0%       5.46kB ± 0%    ~     (all equal)

name        old bss-bytes     new bss-bytes     delta
HelloSize        72.9kB ± 0%       72.9kB ± 0%    ~     (all equal)

name        old exe-bytes     new exe-bytes     delta
HelloSize        1.03MB ± 0%       1.03MB ± 0%    ~     (all equal)

3. The go1 benchmark showed little change in total.
name                     old time/op    new time/op    delta
BinaryTree17-4              41.8s ± 1%     41.8s ± 1%    ~     (p=0.388 n=40+39)
Fannkuch11-4                24.1s ± 1%     24.1s ± 1%    ~     (p=0.077 n=40+40)
FmtFprintfEmpty-4           834ns ± 1%     831ns ± 1%  -0.31%  (p=0.002 n=40+37)
FmtFprintfString-4         1.34µs ± 1%    1.34µs ± 0%    ~     (p=0.387 n=40+40)
FmtFprintfInt-4            1.44µs ± 1%    1.44µs ± 1%    ~     (p=0.421 n=40+40)
FmtFprintfIntInt-4         2.09µs ± 0%    2.09µs ± 1%    ~     (p=0.589 n=40+39)
FmtFprintfPrefixedInt-4    2.32µs ± 1%    2.33µs ± 1%  +0.15%  (p=0.001 n=40+40)
FmtFprintfFloat-4          4.51µs ± 0%    4.44µs ± 1%  -1.50%  (p=0.000 n=40+40)
FmtManyArgs-4              7.94µs ± 0%    7.97µs ± 0%  +0.36%  (p=0.001 n=32+40)
GobDecode-4                 104ms ± 1%     102ms ± 2%  -1.27%  (p=0.000 n=39+37)
GobEncode-4                90.5ms ± 1%    90.9ms ± 2%  +0.40%  (p=0.006 n=37+40)
Gzip-4                      4.10s ± 2%     4.08s ± 1%  -0.30%  (p=0.004 n=40+40)
Gunzip-4                    603ms ± 0%     602ms ± 1%    ~     (p=0.303 n=37+40)
HTTPClientServer-4          672µs ± 3%     658µs ± 2%  -2.08%  (p=0.000 n=39+37)
JSONEncode-4                238ms ± 1%     239ms ± 0%  +0.26%  (p=0.001 n=40+25)
JSONDecode-4                884ms ± 1%     885ms ± 1%  +0.16%  (p=0.012 n=40+40)
Mandelbrot200-4            49.3ms ± 0%    49.3ms ± 0%    ~     (p=0.588 n=40+38)
GoParse-4                  46.3ms ± 1%    46.4ms ± 2%    ~     (p=0.487 n=40+40)
RegexpMatchEasy0_32-4      1.28µs ± 1%    1.28µs ± 0%  +0.12%  (p=0.003 n=40+40)
RegexpMatchEasy0_1K-4      7.78µs ± 5%    7.78µs ± 4%    ~     (p=0.825 n=40+40)
RegexpMatchEasy1_32-4      1.29µs ± 1%    1.29µs ± 0%    ~     (p=0.659 n=40+40)
RegexpMatchEasy1_1K-4      10.3µs ± 3%    10.4µs ± 2%    ~     (p=0.266 n=40+40)
RegexpMatchMedium_32-4     2.05µs ± 1%    2.05µs ± 0%  -0.18%  (p=0.002 n=40+28)
RegexpMatchMedium_1K-4      533µs ± 1%     534µs ± 1%    ~     (p=0.397 n=37+40)
RegexpMatchHard_32-4       28.9µs ± 1%    28.9µs ± 1%  -0.22%  (p=0.002 n=40+40)
RegexpMatchHard_1K-4        868µs ± 1%     870µs ± 1%  +0.21%  (p=0.015 n=40+40)
Revcomp-4                  67.3ms ± 1%    67.2ms ± 2%    ~     (p=0.262 n=38+39)
Template-4                  1.07s ± 1%     1.07s ± 1%    ~     (p=0.276 n=40+40)
TimeParse-4                7.16µs ± 1%    7.16µs ± 1%    ~     (p=0.610 n=39+40)
TimeFormat-4               13.3µs ± 1%    13.3µs ± 1%    ~     (p=0.617 n=38+40)
[Geo mean]                  720µs          719µs       -0.13%

name                     old speed      new speed      delta
GobDecode-4              7.39MB/s ± 1%  7.49MB/s ± 2%  +1.25%  (p=0.000 n=39+38)
GobEncode-4              8.48MB/s ± 1%  8.45MB/s ± 2%  -0.40%  (p=0.005 n=37+40)
Gzip-4                   4.74MB/s ± 2%  4.75MB/s ± 1%  +0.30%  (p=0.018 n=40+40)
Gunzip-4                 32.2MB/s ± 0%  32.2MB/s ± 1%    ~     (p=0.272 n=36+40)
JSONEncode-4             8.15MB/s ± 1%  8.13MB/s ± 0%  -0.26%  (p=0.003 n=40+25)
JSONDecode-4             2.19MB/s ± 1%  2.19MB/s ± 1%    ~     (p=0.676 n=40+40)
GoParse-4                1.25MB/s ± 2%  1.25MB/s ± 2%    ~     (p=0.823 n=40+40)
RegexpMatchEasy0_32-4    25.1MB/s ± 1%  25.1MB/s ± 0%  -0.12%  (p=0.006 n=40+40)
RegexpMatchEasy0_1K-4     132MB/s ± 5%   132MB/s ± 5%    ~     (p=0.821 n=40+40)
RegexpMatchEasy1_32-4    24.7MB/s ± 1%  24.7MB/s ± 0%    ~     (p=0.630 n=40+40)
RegexpMatchEasy1_1K-4    99.1MB/s ± 3%  98.8MB/s ± 2%    ~     (p=0.268 n=40+40)
RegexpMatchMedium_32-4    487kB/s ± 2%   490kB/s ± 0%  +0.51%  (p=0.001 n=40+40)
RegexpMatchMedium_1K-4   1.92MB/s ± 1%  1.92MB/s ± 1%    ~     (p=0.208 n=39+40)
RegexpMatchHard_32-4     1.11MB/s ± 1%  1.11MB/s ± 0%  +0.36%  (p=0.000 n=40+33)
RegexpMatchHard_1K-4     1.18MB/s ± 1%  1.18MB/s ± 1%    ~     (p=0.207 n=40+37)
Revcomp-4                37.8MB/s ± 1%  37.8MB/s ± 2%    ~     (p=0.276 n=38+39)
Template-4               1.82MB/s ± 1%  1.81MB/s ± 1%    ~     (p=0.122 n=38+40)
[Geo mean]               6.81MB/s       6.81MB/s       +0.06%

fixes #19843

Change-Id: Ief3a0c2b15f59d40c7b40f2784eeb71196685b59
Reviewed-on: https://go-review.googlesource.com/61150
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 13:10:33 +00:00
Anthony Sottile
57fa1c7c94 cmd/cgo: treat simple C typedefs as go aliases
Fixes #21809

Change-Id: Ic43077c6bea3c7cdc9611e74abf07b6deab70433
Reviewed-on: https://go-review.googlesource.com/62670
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-11 06:24:15 +00:00
Martin Möhrmann
098126103e cmd/compile: preserve escape information for map literals
While some map literals were marked non-escaping that information
was lost when creating the corresponding OMAKE node which made map
literals always heap allocated.

Copying the escape information to the corresponding OMAKE node allows
stack allocation of hmap and a map bucket for non escaping map literals.

Fixes #21830

Change-Id: Ife0b020fffbc513f1ac009352f2ecb110d6889c9
Reviewed-on: https://go-review.googlesource.com/62790
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 05:54:46 +00:00
Hiroshi Ioka
f797e485e0 cmd/link: don't generate runtime.text twice for buildmode=plugin on darwin
https://golang.org/cl/29394 changed to include runtime.text and
runtime.etext in ctxt.Textp as a work around.
But it seems that the CL forgot to change genasmsym.
As a result, we are generating runtime.text and runtime.etext twice.

Change-Id: If7f8faf496c1c489ffa4804da712f91a3d3f4be4
Reviewed-on: https://go-review.googlesource.com/62810
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-09-11 02:30:05 +00:00
Hiroshi Ioka
410b73728f cmd/link: remove windows-specific kludges from Adddynrel
Adddynrel does nothing on windows. We can make code don't call Adddynrel
on windows in the first place.

Change-Id: I376cc36d44a5df18bda13be57e3916ca3062f181
Reviewed-on: https://go-review.googlesource.com/62611
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
2017-09-10 23:19:52 +00:00