Only return a pointer p to the new slices backing array from makeslice.
Makeslice callers then construct sliceheader{p, len, cap} explictly
instead of makeslice returning the slice.

Reduces go binary size by ~0.2%.
Removes 92 (~3.5%) panicindex calls from go binary.

Change-Id: I29b7c3b5fe8b9dcec96e2c43730575071cfe8a94
Reviewed-on: https://go-review.googlesource.com/c/141822
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Fixes #28423.

Change-Id: Ie57ade565d0407a4bffaa86fb4475ff083168e79
Reviewed-on: https://go-review.googlesource.com/c/145537Reviewed-by: Ian Lance Taylor <iant@golang.org>

This way, once the constant declarations are typechecked, all named
types are fully typechecked and have all of their methods added.

Usually this isn't important, as methods and interfaces cannot be used
in constant declarations. However, it can lead to confusing and
incorrect errors, such as:

	$ cat f.go
	package p

	type I interface{ F() }
	type T struct{}

	const _ = I(T{})

	func (T) F() {}
	$ go build f.go
	./f.go:6:12: cannot convert T literal (type T) to type I:
		T does not implement I (missing F method)

The error is clearly wrong, as T does have an F method. If we ensure
that all funcs are typechecked before all constant declarations, we get
the correct error:

	$ go build f2.go
	# command-line-arguments
	./f.go:6:7: const initializer I(T literal) is not a constant

Fixes #24755.

Change-Id: I182b60397b9cac521d9a9ffadb11b42fd42e42fe
Reviewed-on: https://go-review.googlesource.com/c/115096
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

This will be used to test fixes for bugs in concurrent 'go' command
invocations, such as #26794.

See the README changes for a description of the semantics.

Updates #26794

Change-Id: I897e7b2d11ff4549a4711002eadd6a54f033ce0b
Reviewed-on: https://go-review.googlesource.com/c/141218
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

As a first round, rewrite those handshake message types which can be
reused in TLS 1.3 with golang.org/x/crypto/cryptobyte. All other types
changed significantly in TLS 1.3 and will require separate
implementations. They will be ported to cryptobyte in a later CL.

The only semantic changes should be enforcing the random length on the
marshaling side, enforcing a couple more "must not be empty" on the
unmarshaling side, and checking the rest of the SNI list even if we only
take the first.

Change-Id: Idd2ced60c558fafcf02ee489195b6f3b4735fe22
Reviewed-on: https://go-review.googlesource.com/c/144115
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>

Fixes #25829

Change-Id: I400fdaf0ef3a23bc0d61c4873ffa298e0cf0fc6a
Reviewed-on: https://go-review.googlesource.com/c/145204Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The pipeline parsing code was unnecessarily complex. It used a for loop
with a trailing break, a complex switch, and up to seven levels of
indentation.

Instead, drop the loop in favor of a single named goto with a comment,
and flatten out the complex switch to be easier to follow. Two lines of
code are now duplicated, but they're simple and only three lines apart.

While at it, move the pipe initialization further up to remove the need
for three variables.

Change-Id: I07b29de195f4000336219aadeadeacaaa4285c58
Reviewed-on: https://go-review.googlesource.com/c/145285Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

VMSLG has three variants on z14 and later machines. These variants are used in "limbified" squaring:
VMSLEG: Even Shift Indication -- the even-indexed intermediate result is doubled
VMSLOG: Odd Shift Indication -- the odd-indexed intermediate result is doubled
VMSLEOG: Even and Odd Shift Indication -- both intermediate results are doubled
Limbified squaring is very useful for high performance cryptographic algorithms, such as
elliptic curve. This change allows these instructions to be used in Go assembly.

Change-Id: Iaad577b07320205539f99b3cb37a2a984882721b
Reviewed-on: https://go-review.googlesource.com/c/145180Reviewed-by: Michael Munday <mike.munday@ibm.com>

The wait was there, because we discovered that we could not remove
finished process executable without the wait on Windows XP. But
Windows XP is not supported by Go. Maybe we do not need the wait
with modern Windows versions. Remove the sleep.

Fixes #25965

Change-Id: I02094abee3592ce4fea98eaff9d15137dc54dc81
Reviewed-on: https://go-review.googlesource.com/c/145221
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The package used to accept invalid range pipelines, such as:

	{{range $k, .}}
	{{range $k, 123 := .}}

This is because the logic that allowed a range pipeline to declare
multiple variables was broken. When encountering a single comma inside a
range pipeline, it would happily continue parsing a second variable,
even if we didn't have a variable token at all.

Then, the loop would immediately break, and we'd parse the pipeline we'd
be ranging over. That is, we'd parse {{range $k, .}} as if it were
{{range $k = .}}.

To fix this, only allow the loop to continue if we know we're going to
parse another variable or a token that would end the pipeline. Also add
a few test cases for these error edge cases.

While at it, make use of T.Run, which was useful in debugging
Tree.pipeline via print statements.

Fixes #28437.

Change-Id: Idc9966bf643f0f3bc1b052620357e5b0aa2022ea
Reviewed-on: https://go-review.googlesource.com/c/145282
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
Reviewed-by: Rob Pike <r@golang.org>

We achieve this by always running all tests that create files in a
fresh temporary directory, rather than just on darwin/{arm,arm64}.
As a bonus, this lets us simplify the cleanup code for these tests
and assume their working directory starts out empty.

Updates #28387

Change-Id: I952007ae390a2451c9a368da26c7f9f5af64b2ba
Reviewed-on: https://go-review.googlesource.com/c/145283Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I411483d76a2ca91cd15ff42ae1adb9134486d183
Reviewed-on: https://go-review.googlesource.com/c/145278Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

During development and debugging, I often want to
write noteRule(fmt.Sprintf(...)), and end up
manually adding the import to the generated code.
Let's just make it always available instead.

Change-Id: I1e2d47c98ba056e1b5da42e35fb6ad26f1d9cc3d
Reviewed-on: https://go-review.googlesource.com/c/145207
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>

CL 114797 reworked how arguments get written to the stack.
Some type conversions got lost in the process. Restore them.

Fixes #28390
Updates #28430

Change-Id: Ia0d37428d7d615c865500bbd1a7a4167554ee34f
Reviewed-on: https://go-review.googlesource.com/c/144598
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Adds AIX, DragonFly BSD, FreeBSD, NetBSD, OpenBSD and Solaris
to the list of operating systems where the GODEBUGCPU environment
variable will be parsed and interal/cpu features can be enabled
and disabled.

Updates #27218

Change-Id: I9cd99142e2a5147cb00ca57b581f049ea6ce8508
Reviewed-on: https://go-review.googlesource.com/c/145281Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Martin Möhrmann <martisch@uos.de>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: Ib9f621e380dd9a6beace27ec5ff62780012f8274
Reviewed-on: https://go-review.googlesource.com/c/144600
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

The function documentation was wrong, it was using a wrong parameter. This change
replaces it with the right parameter.

The wrong formula was: q = (u1<<_W + u0 - r)/y
The function has got a parameter "v" (of type Word), not a parameter "y".
So, the right formula is: q = (u1<<_W + u0 - r)/v

Fixes #28444

Change-Id: I82e57ba014735a9fdb6262874ddf498754d30d33
Reviewed-on: https://go-review.googlesource.com/c/145280Reviewed-by: Robert Griesemer <gri@golang.org>

Use information about required CPU features stored in the CPU feature
options slice to test if minimal CPU requirements are met instead
of hard coding this information in the tests directly.

Change-Id: I72d89b1cff305b8e751995d4230a2217e32f4236
Reviewed-on: https://go-review.googlesource.com/c/145118Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Martin Möhrmann <martisch@uos.de>
TryBot-Result: Gobot Gobot <gobot@golang.org>

The arm5 and mips builders are can't-send-a-packet-to-localhost-in-1s
slow apparently. 1m is less useful, but still better than an obscure
test timeout panic.

Fixes #28405

Change-Id: I2feeae6ea1b095114caccaab4f6709f405faebad
Reviewed-on: https://go-review.googlesource.com/c/145037
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I221f77075a25e934e20b41307758a89c19169e05
Reviewed-on: https://go-review.googlesource.com/c/145201Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Avoids allocating an ONAME for OLABEL, OGOTO, and named OBREAK and
OCONTINUE nodes.

Passes toolstash-check.

Change-Id: I359142cd48e8987b5bf29ac100752f8c497261c1
Reviewed-on: https://go-review.googlesource.com/c/145200
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

This is supposed to print out function stack frames, but it's been
broken since golang.org/cl/38593, and no one has noticed.

Change-Id: Iad428a9097d452b878b1f8c5df22afd6f671ac2e
Reviewed-on: https://go-review.googlesource.com/c/145199
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

The proposal to add a DNS cache was rejected, so there is no longer a
need for the associated TODO.

Updates #24796

Change-Id: Ifcedcff72c75a70b2143de0bd3f7bf85ac3528f6
Reviewed-on: https://go-review.googlesource.com/c/145197
Run-TryBot: Ian Gudger <igudger@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Mikio Hara <mikioh.public.networking@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Unlike normal load+op opcodes, the load+compare opcode does
not clobber its non-load argument. Allow the load+compare merge
to happen even if the non-load argument is used elsewhere.

Noticed when investigating issue #28417.

Change-Id: Ibc48d1f2e06ae76034c59f453815d263e8ec7288
Reviewed-on: https://go-review.googlesource.com/c/145097Reviewed-by: Ainar Garipov <gugl.zadolbal@gmail.com>
Reviewed-by: Ben Shi <powerman1st@163.com>

Named constants are represented as OLITERAL with n.Sym != nil.

Change-Id: If6bc8c507ef8c3e4e47f586d86fd1d0f20bf8974
Reviewed-on: https://go-review.googlesource.com/c/145198Reviewed-by: Robert Griesemer <gri@golang.org>

Fixes #27747

Change-Id: I843e9e121d33440648b364650ee8a8a1639a0144
GitHub-Last-Rev: c614e91e23d4d3dea80bc78886a1b7e96456596b
GitHub-Pull-Request: golang/go#28413
Reviewed-on: https://go-review.googlesource.com/c/144998Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This instruction was linked with a new stack layout which might be
needed for AIX. This change might not be taken finally. So, this
instruction must be removed.

See https://go-review.googlesource.com/c/go/+/138733

Change-Id: Ic4a2566e2882696b437eb817d980b7c4bfc03b18
Reviewed-on: https://go-review.googlesource.com/c/144957
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Updates #28102

Change-Id: Iee1ff64c7720108d6d26bfbff60ea51877093960
Reviewed-on: https://go-review.googlesource.com/c/140862
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

The build list is very incomplete in vendor mode,
so we can't rely on it in general.
findModule may be called in modload.PackageModuleInfo, which
load.LoadImport invokes relatively early during a build.

Before this change, the accompanying test failed at 'go build
-mod=vendor' with the message:

	build diamondpoint: cannot find module for path diamondpoint

Change-Id: I5e667d8e406872be703510afeb079f6cbfdbd3c8
Reviewed-on: https://go-review.googlesource.com/c/140861
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #27859

Change-Id: Ibb459cf41c3a8fe41bb008f60ef6cdd3437a37b1
Reviewed-on: https://go-review.googlesource.com/c/140860
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

The existing mod_tidy test uses replacements, but doesn't replace
modules that can also be resolved by fetching from GOPROXY, and
doesn't check the differences between the internal and external views.

This new test clarifies that interaction with a more realistic example.

Change-Id: I2bb2028148f4b7b95c3bfcc54b3976a49515379a
Reviewed-on: https://go-review.googlesource.com/c/140859
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

These files were already ignored via a hard-coded list of excluded files.
Instead of trying to interpret the build tags for these (few) files,
recognize the tags automatically and continue to exclude them.

Fixes #10370.

Change-Id: If7a112ede02e3fa90afe303473d9ea51c5c6609d
Reviewed-on: https://go-review.googlesource.com/c/144457Reviewed-by: Alan Donovan <adonovan@google.com>

Truthy returns the JavaScript "truthiness" of the given value.  In
JavaScript, false, 0, "", null, undefined, and NaN are "falsy", and
everything else is "truthy".

Fixes #28264

Change-Id: I4586f98646c05a4147d06a7c4a5d9c61d956fc83
GitHub-Last-Rev: 649b353ebc23b09d840faf927a2eeca41ee164bf
GitHub-Pull-Request: golang/go#28358
Reviewed-on: https://go-review.googlesource.com/c/144384Reviewed-by: Richard Musiol <neelance@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Richard Musiol <neelance@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This commit adapts TestStmtLines for AIX operating system.

Update #25893

Change-Id: I1c76bbd8fc679a66b65ecfbd1ed7745518064eae
Reviewed-on: https://go-review.googlesource.com/c/144958Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This commits fixes tests for AIX inside os package.

"hostname" command on AIX returns "name.domain" and not only "name".
So, "hostname -s" must be called.

Change-Id: I75e193bcb6ad607ce54ad99aabbed9839012f707
Reviewed-on: https://go-review.googlesource.com/c/144537Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

With https://golang.org/cl/135455, gccgo now uses a different mangling
scheme for package paths; add code to use this new scheme for function
and variable symbols. Since users sometimes use older versions of
gccgo with newer versions of go, perform a test at runtime to see
which mangling scheme is in effect for the version of 'gccgo' in the
path.

Updates #27534.

Change-Id: If7ecab06a72e1361129fe40ca6582070a3e8e737
Reviewed-on: https://go-review.googlesource.com/c/144418Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I7e109470e27eb978f920a99f858dbaffa4872eb5
GitHub-Last-Rev: dd684c2481b234f556a1c84c1771f2d8eb8b5ea2
GitHub-Pull-Request: golang/go#28401
Reviewed-on: https://go-review.googlesource.com/c/144837Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Writer method returns the underlying io.Writer used by the given Logger
object.

Fixes #28327

Change-Id: I6347913d8be8d3222b98967b136cf03d00f446d1
GitHub-Last-Rev: 2db0c5c7416436f99852592d2f258ca93da96712
GitHub-Pull-Request: golang/go#28399
Reviewed-on: https://go-review.googlesource.com/c/144757Reviewed-by: Rob Pike <r@golang.org>

The alias declaration needs to come after the function it is aliasing.

It isn't a big deal in this case, as bits.Mul inlines and has as its
body bits.Mul64, so the desired code gets generated regardless.
The alias should only have an effect on inlining cost estimates
(for functions that call bits.Mul).

Change-Id: I0d814899ce7049a0fb36e8ce1ad5ababbaf6265f
Reviewed-on: https://go-review.googlesource.com/c/144597
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Giovanni Bajo <rasky@develer.com>

This commit adds a check of "process.title" to detect Node.js.

The web app bundler Parcel sets "process" to an empty object. This
incorrectly got detected as Node.js, even though the script was
running in a browser.

Fixes #28364.

Change-Id: Iecac7f8fc3cc4ac7ddb42dd43c5385681a3282de
Reviewed-on: https://go-review.googlesource.com/c/144658Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>