We generate MOVBLZX for byte-sized LoadReg, so
(MOVBQZX (LoadReg (Arg))) is the same as
(LoadReg (Arg)). Remove those zero extension where possible.
Triggers several times during all.bash.
Fixes#25378
Updates #15300
Change-Id: If50656e66f217832a13ee8f49c47997f4fcc093a
Reviewed-on: https://go-review.googlesource.com/115617
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Memmove can use AVX/prefetches/other optional instructions, so
only do it for small sizes, when call overhead dominates.
Change-Id: Ice5e93deb11462217f7fb5fc350b703109bb4090
Reviewed-on: https://go-review.googlesource.com/112517
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Munday <mike.munday@ibm.com>
This fixes builds in Plan 9 under /n. Since directories in /n are
automatically created, /n/go.mod always exists.
Fixes#27074
Change-Id: Ie9a1155b7c316bdc27655f5b99172550b413838d
Reviewed-on: https://go-review.googlesource.com/129804
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The updated list is taken from "src/go/build/syslist.go".
Reason: one should not do web search to know the possible values of GOOS
and GOARCH. The search result point to stackoverflow page which
reference the above source and documentation on installation page [1].
It should available offline (as in local godoc), as part of package
documentation.
[1] https://golang.org/doc/install/source#environment
Change-Id: I736804b8ef4dc11e0260fa862999212ab3f7b3fd
Reviewed-on: https://go-review.googlesource.com/129935
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This reverts commit def3280eb4.
Reason for revert: broke the vetall builder and I (Brad) forgot to run the trybots first. :(
Change-Id: I255bedeb28d13e265f357060e57561e593145275
Reviewed-on: https://go-review.googlesource.com/130015
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
netpoll is perhaps one of the most confusing uses of G lists currently
since it passes around many lists as bare *g values right now.
Switching to gList makes it much clearer what's an individual g and
what's a list.
Change-Id: I8d8993c4967c5bae049c7a094aad3a657928ba6c
Reviewed-on: https://go-review.googlesource.com/129397
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>
There are two manually managed G dequeues. Abstract these both into a
shared gQueue type. This also introduces a gList type, which we'll use
to replace several manually-managed G lists in follow-up CLs.
This makes the code more readable and maintainable. gcFlushBgCredit in
particular becomes much easier to follow. It also makes it easier to
introduce more G queues in the future. Finally, the gList type clearly
distinguishes between lists of Gs and individual Gs; currently both
are represented by a *g, which can easily lead to confusion and bugs.
Change-Id: Ic7798841b405d311fc8b6aa5a958ffa4c7993c6c
Reviewed-on: https://go-review.googlesource.com/129396
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>
TMLL, LGDR and LDGR have all been added to the Go assembler
previously, so we don't need to encode them using WORD and BYTE
directives anymore. This is purely a cosmetic change, it does not
change the contents of any object files.
Change-Id: I93f815b91be310858297d8a0dc9e6d8e3f09dd65
Reviewed-on: https://go-review.googlesource.com/129895
Run-TryBot: Michael Munday <mike.munday@ibm.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Previously Scanner would allow float literals like "1.5e" and "1e+"
that weren't actually valid Go float literals, and also not valid
when passed to ParseFloat. This commit fixes that behaviour to match
the documentation ("recognizes all literals as defined by the Go
language specification"), and Scanner emits an error in these cases.
Fixes#26374
Change-Id: I6855402ea43febb448c6dff105b9578e31803c01
Reviewed-on: https://go-review.googlesource.com/129095
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Add a CacheLinePad struct type to internal/cpu that has a size of CacheLineSize.
This can be used for padding structs in order to avoid false sharing.
Updates #25203
Change-Id: Icb95ae68d3c711f5f8217140811cad1a1d5be79a
Reviewed-on: https://go-review.googlesource.com/116276
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Only the first constant in the function and facility
constant declaration blocks were typed constants.
Make all other constants used for function codes and
named facilities also typed.
Change-Id: I1814121de3733094da699c78b7311f99ba4772e1
Reviewed-on: https://go-review.googlesource.com/126776
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Avoid using package specific variables when there is a one to one
correspondance to cpu feature support exported by internal/cpu.
This makes it clearer which cpu feature is referenced.
Another advantage is that internal/cpu variables are padded to avoid
false sharing and memory and cache usage is shared by multiple packages.
Change-Id: If18fb448a95207cfa6a3376f3b2ddc4b230dd138
Reviewed-on: https://go-review.googlesource.com/126596
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
CL 52430 added logic to skip the testZoneAbbr test in locales where
the timezone does not have a three-letter name, because the following
line
Parse(RFC1123, t1.Format(RFC1123))
failed for timezones with only numeric names (like -07).
Since Go 1.11, Parse supports the parsing of timezones with numeric
names (this was implemented in CL 98157), so we can now run the test
unconditionally.
Change-Id: I8ed40e1ba325c0c0dc79c4184a9e71209e2e9a02
Reviewed-on: https://go-review.googlesource.com/127757
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The parentheses are not required for the definitions and it brings
the declaration style in line with other architectures feature bits
defined in internal/cpu.
Change-Id: I86cc3812c1488216779e0d1f0e7481687502e592
Reviewed-on: https://go-review.googlesource.com/126775
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Those new instructions have acquire/release semantics, besides
normal atomic SWPD/SWPW/SWPH/SWPB.
Change-Id: I24821a4d21aebc342897ae52903aef612c8d8a4a
Reviewed-on: https://go-review.googlesource.com/128476
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
FLD1 pushes +1.0 to the 387 register stack, and FLDZ pushes +0.0
to the 387 regiser stack.
They can be used to simplify MOVSSconst/MOVSDconst when the
constant is +0.0, -0.0, +1.0, -1.0.
The size of the go executable reduces about 62KB and the total size
of pkg/linux_386 reduces about 7KB with this optimization.
Change-Id: Icc8213b58262e0024a277cf1103812a17dd4b05e
Reviewed-on: https://go-review.googlesource.com/119635
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Two funcs and a field were unused. Remove them.
A few statements could be made simpler.
importsym's pos parameter was unused, so remove it.
Finally, don't use printf-like funcs with constant strings that have no
formatting directives.
Change-Id: I415452249bf2168aa353ac4f3643dfc03017ee53
Reviewed-on: https://go-review.googlesource.com/117699
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
Issues #10043, #15405, and #22660 appear to have been fixed, and
whatever tests I could run locally do succeed, so remove the skips.
Issue #7237 was closed in favor of #17906, so update its skip line.
Issue #7634 was closed as it had not appeared for over three years.
Re-enable it for now. An issue should be open if the test starts being
skipped again.
Change-Id: I67daade906744ed49223291035baddaad9f56dca
Reviewed-on: https://go-review.googlesource.com/121735
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
To report the capacity of the underlying buffer. The method mirrors
bytes.Buffer.Cap.
The method can be useful to know whether or not calling write or grow
methods will result in an allocation, or to know how much memory has
been allocated so far.
Fixes#26269.
Change-Id: I391db45ae825011566b594836991e28135369a78
Reviewed-on: https://go-review.googlesource.com/122835
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This lets us simplify the code considerably. For example, unquoting the
tag is no longer necessary, and we can get the field name with a single
method call.
While at it, fix a typechecking error in testdata/structtag.go, which
hadn't been caught since vet still skips past go/types errors in most
cases.
Using go/types will also let us expand the structtag check more easily
if we want to, for example to allow it to check for duplicates in
embedded fields.
Finally, update one of the test cases to check for regressions when we
output invalid tag strings. We also checked that these two changes to
testdata/structtag.go didn't fail with the old structtag check.
For #25593.
Change-Id: Iea4906d0f30a67f36b28c21d8aa96251aae653f5
Reviewed-on: https://go-review.googlesource.com/115676
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Rob Pike <r@golang.org>
Port CL 120295 from golang.org/x/sys/unix to the syscall package.
The ustat syscall has been deprecated on Linux for a long time and the
upcoming glibc 2.28 will remove ustat.h and it can no longer be used to
to generate the Ustat_t wrapper type. Since Linux still provides the
syscall, let's not break this functionality and add a private copy of
struct ustat so Ustat_t can still be generated.
Fixesgolang/go#25990
Change-Id: I0dab2ba1cc76fbd21553b499f9256fd9d59ca409
Reviewed-on: https://go-review.googlesource.com/120563
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Combined appends lead to fewer machine code and faster performance.
Some may even say that it makes code more readable.
Running revAddrTests over reverseaddr gives measurable improvements:
name old time/op new time/op delta
ReverseAddress-8 4.10µs ± 3% 3.94µs ± 1% -3.81% (p=0.000 n=10+9)
Change-Id: I9bda7a20f802bcdffc6e948789765d04c6da04e7
Reviewed-on: https://go-review.googlesource.com/117615
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
These are all errors given by module-aware cmd/go, so they must end with
a newline. It looks like they were omitted by mistake.
Fixes#27081.
Change-Id: I19b5803bb48a6d5dd52e857f483278fe20fe246b
Reviewed-on: https://go-review.googlesource.com/129780
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Need to actually use the flag for it to take effect.
Fixes#27049.
Change-Id: I57227b45f46f9dd67ecbf87c11bb2d08124bcfa0
Reviewed-on: https://go-review.googlesource.com/129801
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
It was a bug to find that commit in the Masterminds/semver repo.
It's not part of the main repo but only part of an unmerged pull request.
The code was updated to try not to look at unmerged pull requests,
but the test was not. Worse, whether the code succeeds at not looking
at unmerged pull requests apparently depends on the git version.
Sigh.
Fixes#26754.
Fixes#27043.
Change-Id: Ib9e07f565906de4f1169244911a258396688f14d
Reviewed-on: https://go-review.googlesource.com/129800
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
In GOPATH mode the rule has always been that 'go run x.go' can
import whatever the package in x.go's directory would be able to
import. Apply the same rule here.
The bad import path was triggering other mysterious errors
during 'go run' in other circumstances. Setting it correctly fixes
those too.
Fixes#26046.
Fixes#27022.
Change-Id: I0a9b0a154a20f48add5a199da85572e7ffe0cde4
Reviewed-on: https://go-review.googlesource.com/129798
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This is an important security problem so we shouldn't disable the test.
The second half was failing on case-sensitive file systems but the
first half is still good.
Fixes#22983.
Change-Id: I437bb4c9f78eb3177aa8b619e2357b2539566ca9
Reviewed-on: https://go-review.googlesource.com/129797
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
If you run
go get -u github.com/rsc/foo/bar...
then the go get command has always worked hard to make sure
that it applies the wildcard after downloading rsc/foo.
(If it applied the wildcard only before downloading rsc/foo,
it would match nothing if you had an empty GOPATH before,
and you'd still have an empty afterward, which is clearly useless.)
The goal has always been that if you run the same go get
command twice, the second command doesn't find anything
new to do.
CL 19892 worked around an "internal error" failure but broke
the rule about the first command doing everything the second
command would. Suppose you had github.com/rsc/foo already,
with just github.com/rsc/foo/bar, and you run
go get -u github.com/rsc/...
The wildcard first matches github.com/rsc/foo/bar, but suppose
updating the repo pulls down github.com/rsc/foo/baz, which
in turn depends on the non-existent package github.com/rsc/quux.
We need to reevaluate the wildcard after the download.
The new pattern match refactoring makes this easier and happened
to have corrected the behavior, but we missed a long test that
expected the old behavior.
Fix that long test.
Change-Id: I088473e7a90925e5c0f9697da9554a11456ddd08
Reviewed-on: https://go-review.googlesource.com/129796
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
If we're looking for a module for a/b/c/d/e,
we check for a module named a/b/c/d/e,
then a/b/c/d, then a/b/c, then a/b, then a.
If we know the source repo for a/b/c and that
fails, we should report that error instead of
continuing the loop: a/b and a are useless,
and the error from a/b/c contains important
information.
The errors are now a bit more verbose than
I'd like but they will suffice for Go 1.11.
$ go get github.com/bradfitz/private/sonos
go get github.com/bradfitz/private/sonos: git ls-remote -q origin in /Users/rsc/pkg/mod/cache/vcs/61e3c76780847e514802ec6af8f940f641c6017f711444f05c59cb17ac46d456: exit status 128:
remote: Repository not found.
fatal: repository 'https://github.com/bradfitz/private/' not found
$ go list launchpad.net/gocheck
can't load package: package launchpad.net/gocheck: unknown import path "launchpad.net/gocheck": bzr branch --use-existing-dir https://launchpad.net/~niemeyer/gocheck/trunk . in /Users/rsc/pkg/mod/cache/vcs/f46ce2ae80d31f9b0a29099baa203e3b6d269dace4e5357a2cf74bd109e13339: exec: "bzr": executable file not found in $PATH
$
Fixes#26885.
Fixes#26982.
Change-Id: I2f9cf1853d2d68af18adad668c80513b6ba220d6
Reviewed-on: https://go-review.googlesource.com/129683
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
"go mod fix" does work already done by nearly every other go command.
It was also confusing why we had both "go mod fix" and "go mod tidy".
Delete "go mod fix".
The main reason we kept "go mod fix" this long was for the discussion
of automatic go.mod updates in its documentation, which is now moved
into a new "go help go.mod".
Fixes#26831.
Change-Id: Ic95ca8918449ab79791d27998e02eb3377ac7972
Reviewed-on: https://go-review.googlesource.com/129682
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
