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Commit Graph

26907 Commits

Author SHA1 Message Date
Josh Bleecher Snyder
194c79c163 [dev.ssa] cmd/compile: add constant cache
The cache gets a 62% hit rate while compiling
the standard library.


name      old time/op    new time/op    delta
Template     449ms ± 2%     443ms ± 4%  -1.40%  (p=0.006 n=23+25)
GoTypes      1.54s ± 1%     1.50s ± 2%  -2.53%  (p=0.000 n=22+22)
Compiler     5.51s ± 1%     5.39s ± 1%  -2.29%  (p=0.000 n=23+25)

name      old alloc/op   new alloc/op   delta
Template    90.4MB ± 0%    90.0MB ± 0%  -0.45%  (p=0.000 n=25+25)
GoTypes      334MB ± 0%     331MB ± 0%  -1.05%  (p=0.000 n=25+25)
Compiler    1.12GB ± 0%    1.10GB ± 0%  -1.57%  (p=0.000 n=25+24)

name      old allocs/op  new allocs/op  delta
Template      681k ± 0%      682k ± 0%  +0.26%  (p=0.000 n=25+25)
GoTypes      2.23M ± 0%     2.23M ± 0%  +0.05%  (p=0.000 n=23+24)
Compiler     6.46M ± 0%     6.46M ± 0%  +0.02%  (p=0.000 n=24+25)


Change-Id: I2629c291892827493d7b55ec4d83f6973a2ab133
Reviewed-on: https://go-review.googlesource.com/20026
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Alexandru Moșoi <alexandru@mosoi.ro>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-29 22:40:43 +00:00
Keith Randall
4fffd4569d [dev.ssa] Merge remote-tracking branch 'origin/master' into ssamerge
(Last?) Semi-regular merge from tip to dev.ssa.

Conflicts:
	src/cmd/compile/internal/gc/closure.go
	src/cmd/compile/internal/gc/gsubr.go
	src/cmd/compile/internal/gc/lex.go
	src/cmd/compile/internal/gc/pgen.go
	src/cmd/compile/internal/gc/syntax.go
	src/cmd/compile/internal/gc/walk.go
	src/cmd/internal/obj/pass.go

Change-Id: Ib5ea8bf74d420f4902a9c6208761be9f22371ae7
2016-02-29 13:32:20 -08:00
Keith Randall
f1f366c1e7 [dev.ssa] cmd/compile: MOVBconst might also clobber flags
It gets rewritten to an xor by the linker also.

Change-Id: Iae35130325d41bd1a09b7e971190cae6f4e17fac
Reviewed-on: https://go-review.googlesource.com/20058
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-29 19:39:15 +00:00
David Crawshaw
07ccc21295 cmd/link: skip allocation when reading symbol name
The object file reader in cmd/link reads the symbol name into a scratch
[]byte, converts it to a string, and then does a substring replacement.
Instead, this CL does the replacement on the []byte into the scratch
space and then creates the final string.

Linking godoc without DWARF, best of ten, shows a ~10% improvement.

tip:           real 0m1.099s user 0m1.541s
this:          real 0m0.990s user 0m1.280s

This is part of an attempt to make suffixarray string deduping
come out as a wash, but it's not there yet:

cl/19987:      real 0m1.335s user 0m1.794s
cl/19987+this: real 0m1.225s user 0m1.540s

Change-Id: Idf061fdfbd7f08aa3a1f5933d3f111fdd1659210
Reviewed-on: https://go-review.googlesource.com/20025
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-29 19:30:48 +00:00
David Crawshaw
6d0b551931 cmd/link: track offset instead of using seek
The Cpos function is used frequently (at least once per symbol) and
it is implemented with the seek syscall. Instead, track current
output offset and use it.

Building the godoc binary with DWARF, best of ten:

tip:  real 0m1.287s user 0m1.573s
this: real 0m1.208s user 0m1.555s

Change-Id: I068148695cd6b4d32cd145db25e59e6f6bae6945
Reviewed-on: https://go-review.googlesource.com/20055
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-29 19:14:20 +00:00
Robert Griesemer
ed1a5e5da6 cmd/compile: cleanup number lexing
Change-Id: Ib0dd458d4ab1c58a2baf36491e288ac32e2ff99e
Reviewed-on: https://go-review.googlesource.com/19962
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-29 19:00:10 +00:00
David Crawshaw
36f25a7e7b cmd/link: allocate small []byte reads together
Reduces number of memory allocations by 12%:

Before: 1816664
After:  1581591

Small speed improvement.

Change-Id: I61281fb852e8e31851a350e3ae756676705024a4
Reviewed-on: https://go-review.googlesource.com/20027
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-29 18:45:35 +00:00
Ian Lance Taylor
f4717a902e misc/cgo/testsanitizers: test that tsan links
Update #14559.

Change-Id: I92603602e5d0a5fcae43f3084f234ff606447190
Reviewed-on: https://go-review.googlesource.com/20056
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-29 17:56:28 +00:00
Shahar Kohanim
8096881927 cmd/link: batch allocations of Lsym
Reduces best of 10 linking of cmd/go by ~5%

Change-Id: If673b877ee12595dae517d7eb48430451e5cadba
Reviewed-on: https://go-review.googlesource.com/20060
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-29 17:32:11 +00:00
Shahar Kohanim
e0b04fa508 cmd/link: Preallocate Lsym map
Preallocate ~2MB for Lsym map (size calculation from http://play.golang.org/p/9L7F5naXRr).
Reduces best of 10 link time of cmd/go by ~4%.
On cmd/go max resident size unaffected, on println hello world max resident size grows by 4mb from 18mb->22mb. Performance improves in both cases.

tip:  real  0m1.283s user  0m1.502s sys 0m0.144s
this: real  0m1.341s user  0m1.598s sys 0m0.136s

Change-Id: I4a95e45fe552f1f64f53e868421b9f45a34f8b96
Reviewed-on: https://go-review.googlesource.com/19979
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2016-02-29 17:30:13 +00:00
Benoit Sigoure
21f2cb60ea syscall: Fix generator for Linux syscalls.
In golang.org/cl/14449 the `getdents' system call got changed to use
_SYS_getdents as a layer of indirection instead of SYS_GETDENTS64 for
compatibility with mips64, but this broke mksyscall.pl, which then
died with with:
  syscall_linux.go:840: malformed //sys declaration

Change-Id: Icb61965d8730f6e81f9fb0fa28c7bab635470f09
Reviewed-on: https://go-review.googlesource.com/20051
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-29 17:28:00 +00:00
Ian Lance Taylor
1df5183f4c misc/cgo/testsanitizers: report stderr if go run tsan*.go fails
Update #14559.

Change-Id: I8894f8e16902685f55a21d902199fbe0905f0558
Reviewed-on: https://go-review.googlesource.com/20050
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
2016-02-29 14:58:15 +00:00
Ilya Tocar
5c5fa3628c [dev.ssa] cmd/compile/internal/ssa: replace load of store with a copy
This is a AMD64 version of CL19743.
Saves additional 1574 bytes in go binary.
This also speeds up bzip2 by 1-4%

Change-Id: I031ba423663c4e83fdefe44e5296f24143e303da
Reviewed-on: https://go-review.googlesource.com/19939
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2016-02-29 14:29:28 +00:00
Ilya Tocar
1b1d0a9a80 [dev.ssa] cmd/compile: Use movups for xmm->xmm mov
Movups is 1 byte smaller than movapd that we currently use.

Change-Id: I22f771f066529352722a28543535ec43497cb9c5
Reviewed-on: https://go-review.googlesource.com/19938
Reviewed-by: David Chase <drchase@google.com>
2016-02-29 14:23:44 +00:00
Brad Fitzpatrick
351c15f1ce all: remove public named return values when useless
Named returned values should only be used on public funcs and methods
when it contributes to the documentation.

Named return values should not be used if they're only saving the
programmer a few lines of code inside the body of the function,
especially if that means there's stutter in the documentation or it
was only there so the programmer could use a naked return
statement. (Naked returns should not be used except in very small
functions)

This change is a manual audit & cleanup of public func signatures.

Signatures were not changed if:

* the func was private (wouldn't be in public godoc)
* the documentation referenced it
* the named return value was an interesting name. (i.e. it wasn't
  simply stutter, repeating the name of the type)

There should be no changes in behavior. (At least: none intended)

Change-Id: I3472ef49619678fe786e5e0994bdf2d9de76d109
Reviewed-on: https://go-review.googlesource.com/20024
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
2016-02-29 03:31:19 +00:00
Shenghou Ma
28ce6f3600 time: document Tick will return nil if d <= 0
Fixes #14557.

Change-Id: I9610b79aafe9c15f9c998739b586fd0b41b90d70
Reviewed-on: https://go-review.googlesource.com/20031
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-29 02:33:26 +00:00
Josh Bleecher Snyder
1b417e20ff cmd/compile: superficial cleanup in maplit
Mostly renaming variables for clarity.

Passes toolstash -cmp.

Change-Id: I9867137c34c14985cbbbdb2d34fbbe4cc65cb6fb
Reviewed-on: https://go-review.googlesource.com/20023
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2016-02-29 02:17:58 +00:00
Ian Lance Taylor
1d5001afef cmd/compile: change Node.Nbody, Func.Inl from *NodeList to Nodes
Passes toolstash -cmp.

Casual timings show about a 3% improvement in compile times.

Update #14473.

Change-Id: I584add2e8f1a52486ba418b25ba6122b7347b643
Reviewed-on: https://go-review.googlesource.com/19989
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-29 00:33:32 +00:00
Martin Möhrmann
75cc05fa55 fmt: fix formatting of numbers with f.space and f.plus specified
Do not replace the sign in front of a number with a space if both
f.space and f.plus are both specified for number formatting.
This was already the case for integers but not for floats
and complex numbers.

Updates: #14543.

Change-Id: I07ddeb505003db84a8a7d2c743dc19fc427a00bd
Reviewed-on: https://go-review.googlesource.com/19974
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2016-02-29 00:17:07 +00:00
Ian Lance Taylor
f5ab890c18 cmd/go: only check SWIG intsize once per build
Besides being more efficient in a large build, this avoids a possible
race when creating the input file.

Change-Id: Ifc2cb055925a76be9c90eac56d84ebd9e14f2bbc
Reviewed-on: https://go-review.googlesource.com/19392
Reviewed-by: Michael Hudson-Doyle <michael.hudson@canonical.com>
2016-02-29 00:08:51 +00:00
David Chase
8107b0012f [dev.ssa] cmd/compile: use 32-bit load to read writebarrier
Avoid targeting a partial register with load;
ensure source of load (writebarrier) is aligned.

Better yet would be "CMPB $1,writebarrier" but that requires
wrestling with flagalloc (mem operand complicates moving
instruction around).

Didn't see a change in time for
   benchcmd -n 10 Build go build net/http

Verified that we clean the code up properly:
   0x20a8 <main.main+104>:	mov    0xc30a2(%rip),%eax
                            # 0xc5150 <runtime.writeBarrier>
   0x20ae <main.main+110>:	test   %al,%al

Change-Id: Id5fb8c260eaec27bd727cb0ae1476c60343b0986
Reviewed-on: https://go-review.googlesource.com/19998
Reviewed-by: Keith Randall <khr@golang.org>
2016-02-28 22:29:23 +00:00
David Chase
34f048c9d9 [dev.ssa] cmd/compile: small optimization to prove using sdom tweak
Exposed data already in sdom to avoid recreating it in prove.

Change-Id: I834c9c03ed8faeaee013e5a1b3f955908f0e0915
Reviewed-on: https://go-review.googlesource.com/19999
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alexandru Moșoi <alexandru@mosoi.ro>
2016-02-28 22:28:24 +00:00
Tamir Duberstein
622780b1c1 crypto/tls: don't log expected errors in test
This is minor cleanup that reduces test output noise.

Change-Id: Ib6db4daf8cb67b7784b2d5b222fa37c7f78a6a04
Reviewed-on: https://go-review.googlesource.com/19997
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-28 20:36:38 +00:00
Alexandru Moșoi
bdea1d58cf [dev.ssa] cmd/compile/internal/ssa: remove proven redundant controls.
* It does very simple bounds checking elimination. E.g.
removes the second check in for i := range a { a[i]++; a[i++]; }
* Improves on the following redundant expression:
return a6 || (a6 || (a6 || a4)) || (a6 || (a4 || a6 || (false || a6)))
* Linear in the number of block edges.

I patched in CL 12960 that does bounds, nil and constant propagation
to make sure this CL is not just redundant. Size of pkg/tool/linux_amd64/*
(excluding compile which is affected by this change):

With IsInBounds and IsSliceInBounds
-this -12960 92285080
+this -12960 91947416
-this +12960 91978976
+this +12960 91923088

Gain is ~110% of 12960.

Without IsInBounds and IsSliceInBounds (older run)
-this -12960 95515512
+this -12960 95492536
-this +12960 95216920
+this +12960 95204440

Shaves 22k on its own.

* Can we handle IsInBounds better with this? In
for i := range a { a[i]++; } the bounds checking at a[i]
is not eliminated.

Change-Id: I98957427399145fb33693173fd4d5a8d71c7cc20
Reviewed-on: https://go-review.googlesource.com/19710
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-28 19:48:20 +00:00
Tamir Duberstein
186d3e30be crypto/tls: tests prefer constants to opaque literals
This is minor cleanup that makes the tests more readable.

Change-Id: I9f1f98f0f035096c284bdf3501e7520517a3e4d9
Reviewed-on: https://go-review.googlesource.com/19993
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-28 19:31:48 +00:00
Justin Nuß
92408107dc mime: Fix BenchmarkQDecodeHeader to call DecodeHeader
Found this while reading through the code. The benchmark
accidently called the wrong function.

Change-Id: Idb88aa71e7098a4e29e7f5f39e64f8c5f8936a2a
Reviewed-on: https://go-review.googlesource.com/19977
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-28 17:24:01 +00:00
Todd Neal
4e95dfed01 [dev.ssa] cmd/compile: add max arg length to opcodes
Add the max arg length to opcodes and use it in zcse.  Doesn't affect
speed, but allows better checking in checkFunc and removes the need
to keep a list of zero arg opcodes up to date.

Change-Id: I157c6587154604119720ec6228b767b6e52bb5c7
Reviewed-on: https://go-review.googlesource.com/19994
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Todd Neal <todd@tneal.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-28 14:50:19 +00:00
Joe Tsai
ff27421067 compress/bzip2: fix benchmark to actually measure decompression rate
Motivation:
* Previously, the size of the compressed data was used for metrics,
rather than the uncompressed size. This causes the library to appear
to perform poorly relative to C or other implementation. Switch it
to use the uncompressed size so that it matches how decompression
benchmarks are usually done (like in compress/flate). This also makes
it easier to compare bzip2 rates to other algorithms since they measure
performance in this way.
* Also, reset the timer after doing initialization work.

Change-Id: I32112c2ee8e7391e658c9cf31039f70a689d9b9d
Reviewed-on: https://go-review.googlesource.com/17611
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-28 11:06:40 +00:00
Joe Tsai
47379929f1 compress/bzip2: use correct block size
The bzip2 block size is a multiple of 100*1000 not 100*1024.
Thus, the bzip2 decoder would incorrectly decode files with larger
block sizes when it should have otherwise failed.
Fortunately, we can correct this in a backwards compatible way since
Go has no implementation of a bzip2 encoder to produce bad blocks :)

To confirm that the C bzip2 utlity chokes on this data:
	$ echo "425a683131415926535936dc55330063ffc0006000200020a40830008b00
	08b8bb9229c28481b6e2a998" | xxd -r -p | bzip2 -d

	bzip2: Data integrity error when decompressing.

Fixes #13941

Change-Id: I2402e8829a8027ef94dd4fac050b200440a3d4e4
Reviewed-on: https://go-review.googlesource.com/20011
Run-TryBot: Joe Tsai <joetsai@digital-static.net>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-28 10:54:03 +00:00
Joe Tsai
5fc4decd10 compress/flate: extract LZ77 dictionary logic into seperate struct
The LZ77 portion of DEFLATE is relatively self-contained. For the
decompression side of things, we extract this logic out for the
following reasons:
* It is easier to test just the LZ77 portion of the logic.
* It reduces the noise in the inflate.go

Also, we adjust the way that callbacks are handled in the inflate.
Instead of using functions to abstract the logical componets of
huffmanBlock(), use goto statements to jump between the necessary
sections. This is faster since it avoids a function call and is
arguably more readable.

benchmark                              old MB/s     new MB/s     speedup
BenchmarkDecodeDigitsSpeed1e4-4        53.62        60.11        1.12x
BenchmarkDecodeDigitsSpeed1e5-4        61.90        69.07        1.12x
BenchmarkDecodeDigitsSpeed1e6-4        63.24        70.58        1.12x
BenchmarkDecodeDigitsDefault1e4-4      54.10        59.00        1.09x
BenchmarkDecodeDigitsDefault1e5-4      69.50        74.07        1.07x
BenchmarkDecodeDigitsDefault1e6-4      71.54        75.85        1.06x
BenchmarkDecodeDigitsCompress1e4-4     54.39        58.94        1.08x
BenchmarkDecodeDigitsCompress1e5-4     69.21        73.96        1.07x
BenchmarkDecodeDigitsCompress1e6-4     71.14        75.75        1.06x
BenchmarkDecodeTwainSpeed1e4-4         53.15        58.13        1.09x
BenchmarkDecodeTwainSpeed1e5-4         66.56        72.29        1.09x
BenchmarkDecodeTwainSpeed1e6-4         69.13        75.11        1.09x
BenchmarkDecodeTwainDefault1e4-4       56.00        60.23        1.08x
BenchmarkDecodeTwainDefault1e5-4       77.84        82.27        1.06x
BenchmarkDecodeTwainDefault1e6-4       82.07        86.85        1.06x
BenchmarkDecodeTwainCompress1e4-4      56.13        60.38        1.08x
BenchmarkDecodeTwainCompress1e5-4      78.23        82.62        1.06x
BenchmarkDecodeTwainCompress1e6-4      82.38        86.73        1.05x

Change-Id: I8c6ae0e6bed652dd0570fc113c999977f5e71636
Reviewed-on: https://go-review.googlesource.com/16528
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-28 10:36:01 +00:00
Caio Marcelo de Oliveira Filho
3cb870d47b testing: make failure in benchmark cause non-zero exit status
Moves the implementation of RunBenchmarks to a non-exported function
that returns whether the execution was OK, and uses that to identify
failure in benchmarks.The exported function is kept for compatibility.

Like before, benchmarks will only be executed if tests and examples
pass. The PASS message will not be printed if there was a failure in
a benchmark.

Example output

	BenchmarkThatCallsFatal-8	--- FAIL: BenchmarkThatCallsFatal-8
		x_test.go:6: called by benchmark
	FAIL
	exit status 1
	FAIL	_/.../src/cmd/go/testdata/src/benchfatal	0.009s

Fixes #14307.

Change-Id: I6f3ddadc7da8a250763168cc099ae8b325a79602
Reviewed-on: https://go-review.googlesource.com/19889
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2016-02-28 05:19:05 +00:00
Ian Lance Taylor
c8ef0df06c cmd/cgo: add hooks for thread sanitizer
When Go code is used with C code compiled with -fsanitize=thread, adds
thread sanitizer calls so that correctly synchronized Go code does not
cause spurious failure reports from the thread sanitizer.  This may
cause some false negatives, but for the thread sanitizer what is most
important is avoiding false positives.

Change-Id: If670e4a6f2874c7a2be2ff7db8728c6036340a52
Reviewed-on: https://go-review.googlesource.com/17421
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
2016-02-28 04:56:17 +00:00
kortschak
c86dbbe1b9 misc/cgo/fortran: clean up after successful helloworld.90 build
Change-Id: If03185a21e088c9b383a82c14d649805f00c8042
Reviewed-on: https://go-review.googlesource.com/20000
Reviewed-by: Minux Ma <minux@golang.org>
2016-02-28 04:30:41 +00:00
Austin Clements
d62d831882 runtime: clean up adjustpointer and eliminate write barrier
Commit a5c3bbe modified adjustpointers to use *uintptrs instead of
*unsafe.Pointers for manipulating stack pointers for clarity and to
eliminate the unnecessary write barrier when writing the updated stack
pointer.

This commit makes the equivalent change to adjustpointer.

Change-Id: I6dc309590b298bdd86ecdc9737db848d6786c3f7
Reviewed-on: https://go-review.googlesource.com/17148
Reviewed-by: Rick Hudson <rlh@golang.org>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-28 04:19:01 +00:00
Ian Lance Taylor
71cc445cf9 cmd/cgo: recognize known C typedefs as types
Fixes #14483.

Change-Id: I0cddfe27fd8d00ba85659d0b618410e39ebf45cb
Reviewed-on: https://go-review.googlesource.com/19860
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-27 22:51:51 +00:00
Ian Lance Taylor
922ce58de0 cmd/compile: change Func.Cvars to the new Nodes type
Update #14473.

Change-Id: Iba1ecf42d9ab5a93144941439d5cc6b0b4f4a3ac
Reviewed-on: https://go-review.googlesource.com/19992
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-27 22:43:26 +00:00
Martin Möhrmann
7da4ceddd0 fmt: simplify buffer write methods and adjust calls to them
Once upon a time fmt did use bytes.Buffer for its buffer.
The buffer write methods still mimic the bytes.Buffer signatures.
The current code depends on manipulating the buffer []bytes array directly
which makes going back to bytes.Buffer by only changing the type of buffer
impossible. Since type buffer is not exported the methods can be simplified
to the needs of fmt. This saves space and avoids unnecessary overhead.

Use WriteString instead of Write for known inputs since
WriteString is faster than Write to append the same data.
This also saves space in the binary.

Remove the add method from Printer and depending on the data to be written
use WriteRune or WriteByte directly instead.

In total makes the go binary around 4 kilobyte smaller.

name                  old time/op  new time/op  delta
SprintfEmpty-2        24.1ns ± 3%  23.8ns ± 1%  -1.14%  (p=0.000 n=20+20)
SprintfString-2        114ns ± 2%   114ns ± 4%    ~     (p=0.558 n=20+19)
SprintfInt-2           116ns ± 9%   118ns ± 7%    ~     (p=0.086 n=20+20)
SprintfIntInt-2        195ns ± 6%   193ns ± 5%    ~     (p=0.345 n=20+19)
SprintfPrefixedInt-2   251ns ±16%   241ns ± 9%  -3.69%  (p=0.024 n=20+19)
SprintfFloat-2         203ns ± 4%   205ns ± 5%    ~     (p=0.153 n=20+20)
SprintfBoolean-2       101ns ± 7%    96ns ±11%  -5.23%  (p=0.005 n=19+20)
ManyArgs-2             651ns ± 7%   628ns ± 7%  -3.44%  (p=0.002 n=20+20)
FprintInt-2            164ns ± 2%   158ns ± 2%  -3.62%  (p=0.000 n=20+18)
FprintfBytes-2         215ns ± 1%   216ns ± 1%  +0.58%  (p=0.000 n=20+20)
FprintIntNoAlloc-2     115ns ± 0%   112ns ± 0%  -2.61%  (p=0.000 n=20+20)
ScanInts-2             700µs ± 0%   702µs ± 1%  +0.38%  (p=0.000 n=18+20)
ScanRecursiveInt-2    82.7ms ± 0%  82.7ms ± 0%    ~     (p=0.820 n=20+20)

Change-Id: I0409eb170b8a26d9f4eb271f6292e5d39faf2d8b
Reviewed-on: https://go-review.googlesource.com/19955
Reviewed-by: Rob Pike <r@golang.org>
2016-02-27 21:12:19 +00:00
Justin Nuß
9d73a6dcad strconv: Avoid allocation in AppendQuote*
The current implementations of the AppendQuote functions use quoteWith
(through Quote) for quoting the given value and appends the returned
string to the dst byte slice. quoteWith internally creates a byte slice
on each call which gets converted to a string in Quote.

This means the AppendQuote functions always allocates a new byte slice
and a string only to append them to an existing byte slice. In the case
of (Append)QuoteRune the string passed to quoteWith will also needs to
be allocated from a rune first.

Split quoteWith into two functions (quoteWith and appendQuotedWith) and
replace the call to Quote inside AppendQuote with appendQuotedWith,
which appends directly to the byte slice passed to AppendQuote and also
avoids the []byte->string conversion.

Also introduce the 2 functions quoteRuneWith and appendQuotedRuneWith
that work the same way as quoteWith and appendQuotedWith, but take a
single rune instead of a string, to avoid allocating a new string when
appending a single rune, and use them in (Append)QuoteRune.

Also update the ToASCII and ToGraphic variants to use the new functions.

Benchmark results:

benchmark                      old ns/op     new ns/op     delta
BenchmarkQuote-8               428           503           +17.52%
BenchmarkQuoteRune-8           148           105           -29.05%
BenchmarkAppendQuote-8         435           307           -29.43%
BenchmarkAppendQuoteRune-8     158           23.5          -85.13%

benchmark                      old allocs     new allocs     delta
BenchmarkQuote-8               3              3              +0.00%
BenchmarkQuoteRune-8           3              2              -33.33%
BenchmarkAppendQuote-8         3              0              -100.00%
BenchmarkAppendQuoteRune-8     3              0              -100.00%

benchmark                      old bytes     new bytes     delta
BenchmarkQuote-8               144           144           +0.00%
BenchmarkQuoteRune-8           16            16            +0.00%
BenchmarkAppendQuote-8         144           0             -100.00%
BenchmarkAppendQuoteRune-8     16            0             -100.00%

Change-Id: I77c148d5c7242f1b0edbbeeea184878abb51a522
Reviewed-on: https://go-review.googlesource.com/18962
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-27 17:15:01 +00:00
Mikio Hara
f3f920ff8d crypto/tls: don't send IPv6 literals and absolute FQDNs as SNI values
This is a followup change to #13111 for filtering out IPv6 literals and
absolute FQDNs from being as the SNI values.

Updates #13111.
Fixes #14404.

Change-Id: I09ab8d2a9153d9a92147e57ca141f2e97ddcef6e
Reviewed-on: https://go-review.googlesource.com/19704
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-27 10:05:53 +00:00
Martin Möhrmann
abcad1e59d fmt: change padding functions to avoid package init
Move the decision if zero padding is allowed to doPrintf
where the other formatting decisions are made.

Removes some dead code for negative f.wid that was never used
due to f.wid always being positive and f.minus deciding if left
or right padding should be used.

New padding code writes directly into the buffer and is as fast
as the old version but avoids the cost of needing package init.

name              old time/op  new time/op  delta
SprintfPadding-2   246ns ± 5%   245ns ± 4%   ~     (p=0.345 n=50+47)

Change-Id: I7dfddbac8e328f4ef0cdee8fafc0d06c784b2711
Reviewed-on: https://go-review.googlesource.com/19957
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2016-02-27 06:59:39 +00:00
Matthew Dempsky
8b96bc6818 cmd/compile: remove unneeded test binary
Accidentally added in https://golang.org/cl/19968.

Change-Id: Id70917c4d1f69db149688d797c90a19557d16f72
Reviewed-on: https://go-review.googlesource.com/19985
Reviewed-by: Minux Ma <minux@golang.org>
2016-02-27 06:17:36 +00:00
David du Colombier
ccf39a23b1 debug/gosym: fix TestPCLine on Plan 9
Plan 9 doesn't define main, so the INITENTRY
symbol remains with the SXREF type, which leads
Entryvalue to fail on "entry not text: main".

Fixes #14536.

Change-Id: Id9b7d61e5c2202aba3ec9cd52f5b56e0a38f7c47
Reviewed-on: https://go-review.googlesource.com/19973
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2016-02-27 05:13:33 +00:00
Keith Randall
91f69c675d [dev.ssa] cmd/compile: with -N, don't put JMPs after calls
plive doesn't like the fact that we put JMPs right
after CALL ops to select{send,recv}.

Fixes SSA -N build.

Change-Id: I9b3c9e5293196094fd5a6206dd2f99784951f7a9
Reviewed-on: https://go-review.googlesource.com/19982
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2016-02-27 02:42:19 +00:00
Brad Fitzpatrick
31f2ed2cae doc: go1.7.txt updates
Change-Id: I6ac3d11ee8896f636235fe10c2556f93584019b5
Reviewed-on: https://go-review.googlesource.com/19984
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-27 01:23:21 +00:00
Matthew Dempsky
52f099c426 cmd/compile: simplify lexinit and lexfini
Split the syms array into separate basicTypes and builtinFuncs arrays.

Also, in lexfini, instead of duplicating the code from lexinit to
declare the builtin identifiers in the user package, just import them
from builtinpkg like how importdot works.

Change-Id: Ic3b3b454627a46f7bd5f290d0e31443e659d431f
Reviewed-on: https://go-review.googlesource.com/19936
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2016-02-27 01:02:25 +00:00
Ian Lance Taylor
188e3d2515 cmd/compile: change Func.{Enter,Exit} from NodeList to slice
Introduces a new types Nodes that can be used to replace NodeList.

Update #14473.

Change-Id: Id77c5dcae0cbeb898ba12dd46bd400aad408871c
Reviewed-on: https://go-review.googlesource.com/19969
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-27 00:59:47 +00:00
Martin Möhrmann
6520da6ed5 fmt: use public io.RuneScanner interface for ScanState reader
All io.Reader that are passed to newScanState in all the standard
library tests that implement io.RuneReader also implement io.RuneScanner.

Do not check on each call ScanState's UnreadRune that the used RuneReader
also implements the UnreadRune method by using a private interface.
Instead require the used Reader to implement the public RuneScanner
interface.

The extra implementation logic for UnreadRune is removed from ScanState.
Instead the readRune wrapper is extended to implement UnreadRune for the
RuneScanner interface. If the Reader passed to newScanstate does not
implement RuneScanner the readRune wrapper is used to implement the
missing functionality.

Note that a RuneReader that does not implement RuneScanner will also
be wrapped by runeRead which was not the case before.
Performance with the readRune wrapper is better than without before.

Add benchmark to compare performance with and without using the
readRune wrapper.

name                             old time/op  new time/op  delta
ScanInts-2                        704µs ± 0%   615µs ± 1%  -12.73%  (p=0.000 n=20+20)
ScanRecursiveInt-2               82.6ms ± 0%  51.4ms ± 0%  -37.71%  (p=0.000 n=20+20)
ScanRecursiveIntReaderWrapper-2  85.1ms ± 0%  52.4ms ± 0%  -38.36%  (p=0.000 n=20+20)

Change-Id: I8c6e85db9b87a8171caab12f020b6e256b498e81
Reviewed-on: https://go-review.googlesource.com/19895
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2016-02-26 23:46:51 +00:00
Josh Bleecher Snyder
b30e1d728c cmd/compile: consolidate alg code
Pull all alg-related code into its own file.
subr.go is a Hobbesian Leviathan.

100% code movement. Cleanup and improvements to follow.

Change-Id: Ib9c8f66563fdda90c6e8cf646d366a9487a4648d
Reviewed-on: https://go-review.googlesource.com/19980
Reviewed-by: Dave Cheney <dave@cheney.net>
Run-TryBot: Dave Cheney <dave@cheney.net>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-26 23:39:01 +00:00
Matthew Dempsky
f5f8b38462 cmd/compile: eliminate prectab
While here, merge LINC and LDEC into LINCOP.

Fixes #13244.

Change-Id: I8ea426f986d60d35c3b1a80c056a7aa49d22d802
Reviewed-on: https://go-review.googlesource.com/19928
Reviewed-by: Robert Griesemer <gri@golang.org>
2016-02-26 23:12:43 +00:00
Ian Lance Taylor
6abc8c9a88 cmd/compile: change Func.Inldcl from []*Node to *[]*Node
Save a few bytes in Func.

Passes toolstash -cmp.

Update #14473.

Change-Id: I824fa7d5cb2d93f6f59938ccd86114abcbea0043
Reviewed-on: https://go-review.googlesource.com/19968
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-02-26 22:45:21 +00:00