These regexes are all related to commands like get and build, so they're
unnecessary for simpler commands like env. In particular, we need env to
be fast, since libraries like go/packages call it early and often. Some
external Go tools are interactive, so milliseconds matter.
lazyregexp eagerly compiles the patterns when running from within a test
binary, so there's no longer any need to do that as part of non-test
binaries.
Picking up the low-hanging fruit spotted by 'perf record' shaves off
well over a full millisecond off the benchmark on my laptop:
name old time/op new time/op delta
ExecGoEnv-8 4.92ms ± 1% 3.81ms ± 0% -22.52% (p=0.004 n=6+5)
This CL required adding a few more methods to the lazy regexp wrapper.
Updates #29382.
Change-Id: I22417ab6258f7437a2feea0d25ceb2bb4d735a15
Reviewed-on: https://go-review.googlesource.com/c/155540
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Unwrap, Is and As are as defined in proposal
Issue #29934.
Also add Opaque for enforcing an error cannot
be unwrapped.
Change-Id: I4f3feaa42e3ee7477b588164ac622ba4d5e77cad
Reviewed-on: https://go-review.googlesource.com/c/163558
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
errors.New now implements Formatter and includes Frame
information that is reported when detail is requested.
Partly implements proposal Issue #29934.
Change-Id: Id76888d246d7d862595b5e92d517b9c03f23a7a6
Reviewed-on: https://go-review.googlesource.com/c/163557
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
The proposed change introduces a better initial guess which is closer to the final value and therefore converges in fewer steps. Consider for example sqrt(8): previously the guess was 8, whereas now it is 4 (and the result is 2). All this change does is it computes the division by two more accurately while it keeps the guess ≥ √x.
Change-Id: I917248d734a7b0488d14a647a063f674e56c4e30
GitHub-Last-Rev: c06d9d4876
GitHub-Pull-Request: golang/go#28981
Reviewed-on: https://go-review.googlesource.com/c/163866
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
to be used by errors package for checking assignability
and setting error values in As.
Updates #29934.
Change-Id: I8c1d02a2c6efa0919d54b286cfe8b4edc26da059
Reviewed-on: https://go-review.googlesource.com/c/161759
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Comparing errors using DeepEqual breaks if frame information
is added as proposed in Issue #29934.
Updates #29934.
Change-Id: Ib430c9ddbe588dd1dd51314c408c74c07285e1ff
Reviewed-on: https://go-review.googlesource.com/c/162179
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
Comparing errors using DeepEqual breaks if frame information
is added as proposed in Issue #29934.
Updates #29934.
Change-Id: I4ef076e262109a9d6f5b18846129df2535611d71
Reviewed-on: https://go-review.googlesource.com/c/162178
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Comparing errors using DeepEqual breaks if frame information
is added as proposed in Issue #29934.
Updates #29934.
Change-Id: I0372883288f974998138f95f6c7c79a60f922a3e
Reviewed-on: https://go-review.googlesource.com/c/162177
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
Now that these tests are written in Go, they must be run in host mode
in order to be able to exec `go run` as a subprocess.
Updates #30228
Change-Id: Ibedf86a8e18ae1b6f583c1bbdcb99d19c8e01744
Reviewed-on: https://go-review.googlesource.com/c/164137
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The specialized conversion functions care only
about a type's layout in memory, so e.g.
[1]string is equivalent to string.
Add types.SoleComponent to assist with such use cases,
and use it for the specialized conversion functions.
Increases the number of convTstring calls by ~1%.
Change-Id: I09a392909f2037387b30642781e65f707a048af5
Reviewed-on: https://go-review.googlesource.com/c/148577
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Noticed by Bryan after CL 163618 went in.
Change-Id: Ia33c80dca60321f6a8329097ff55118e5d2634ab
Reviewed-on: https://go-review.googlesource.com/c/164042
Run-TryBot: Elias Naur <mail@eliasnaur.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
These tests use runtime.GOOS and runtime.GOARCH to determine whether
to run, so must be built and run using the destination's — not the
host's — GOOS and GOARCH.
Updates #30228
Change-Id: I6774dacd01c68b395fca8ca61f70d5879270af8a
Reviewed-on: https://go-review.googlesource.com/c/164117
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
This test currently fails in the Android builders, with the message
pkg_test.go:64: go test -short: exec: "go": executable file not found in $PATH
(https://build.golang.org/log/39ec0da5bfb7793359e199cc8e358ca5a8257840)
I was not able to test this change, because I can't get 'gomote
create' to return an instance of anything Android. However, I will
watch the build dashboard after submitting to verify that the fix
works.
Updates #30228
Android appears to lack a 'go' command in the.
Change-Id: Ieacac7f50d19e2cfef2f5d60e79a159e55b5cfa8
Reviewed-on: https://go-review.googlesource.com/c/164097
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Elias Naur <mail@eliasnaur.com>
This should help to catch any regressions in the course of implementing #26924.
Updates #26924
Change-Id: Ide28a9aa0235867e0ce72f855fbed51c50e2c2f2
Reviewed-on: https://go-review.googlesource.com/c/163520
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
'go env' is used for many quick operations, such as in go/packages to
query GOARCH and GOMOD. It often is a bottleneck; for example,
go/packages doesn't know whether or not to use Go modules until it has
queried GOMOD.
As such, this go command should be fast. Right now it's slower than it
should be. This commit adds a simple benchmark with os/exec, since we're
particularly interested in the cost of cmd/go's large init function.
Updates #29382.
Change-Id: Ifee6fb9997b9b89565fbfc2739a00c86117b1d37
Reviewed-on: https://go-review.googlesource.com/c/155961
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
This was implemented as part of go/doc, but it's going to be useful in
other packages. In particular, many packages under cmd/go like web and
vcs make somewhat heavy use of global regexes, which add a non-trivial
amount of init work to the cmd/go program.
A lazy wrapper around regexp.Regexp will make it trivial to get rid of
the extra cost with a trivial refactor, so make it possible for other
packages in the repository to make use of it. While naming the package,
give the members better names, such as lazyregexp.New and
lazyregexp.Regexp.
We're also considering adding some form of a lazy API to the public
regexp package, so this internal package will allow us to get some
initial experience across std and cmd.
For #29382.
Change-Id: I30b0e72871d5267c309786f95f4cb15c68b2393d
Reviewed-on: https://go-review.googlesource.com/c/164040
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
--whole-archive doesn't exist on AIX. It was already removed most of
the time but was still added with c-archive or c-shared buildmodes.
Change-Id: Ia7360638509d4a4d91674b0281ed4b112508a2c9
Reviewed-on: https://go-review.googlesource.com/c/164037
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This reverts commit ec521467e3.
Reson for revert: The test cases using slowDst4 and slowDst6 are
fragile. We need to find out a better approach to the trick on the IP
routeability.
Change-Id: I544453886e809d1c7b339673d8f1d5bdef357147
Reviewed-on: https://go-review.googlesource.com/c/163919
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commits adds a missing syscall and a missing structure in syscall
package.
Change-Id: I9d630454c56337267f7bbb023e601246e14fc929
Reviewed-on: https://go-review.googlesource.com/c/163978
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
If a type switch case expression has failed typechecking, the case body is
likely to also fail with confusing or spurious errors. Suppress
typechecking the case body when this happens.
Fixes#28926
Change-Id: Idfdb9d5627994f2fd90154af1659e9a92bf692c4
Reviewed-on: https://go-review.googlesource.com/c/158617
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
If a PE file with invalid optional header size (neither
sizeofOptionalHeader32 nor sizeofOptionalHeader64) is passed to NewFile,
the File.OptionalHeader will be nil which leads to a panic in
(*File).ImportedSymbols().
Fixes#30250
Change-Id: Ie97306de4a0e2dcfdc7b1b599891f574aa63adca
Reviewed-on: https://go-review.googlesource.com/c/162858
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
In Go 1.13 we will enable RSA-PSS in TLS 1.2 at the same time as we make
TLS 1.3 enabled by default.
This reverts commit 7ccd3583ed.
Updates #30055
Change-Id: I6f2ddf7652d1172a6b29f4e335ff3a71a89974bc
Reviewed-on: https://go-review.googlesource.com/c/163080
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
Prior to this change, DATA instructions accepted
the values 1, 2, 4, and 8 as sizes.
The acceptable sizes were further restricted
to 4 and 8 for float constants.
This was both too restrictive and not restrictive enough:
string constants may reasonably have any length,
and address constants should really only accept pointer-length sizes.
Fixes#30269
Change-Id: I06e44ecdf5909eca7b19553861aec1fa39655c2b
Reviewed-on: https://go-review.googlesource.com/c/163747
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
These are required when testing gccgo.
Change-Id: I6a81d7f4d48292c32a8b3b15ef44d859ab3aa26e
Reviewed-on: https://go-review.googlesource.com/c/163861
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Fix the punctuation and use the proper units for microseconds,
while explaining the incorrect but common variant 'us'.
Change-Id: I9e96694ef27ab4761efccd8616ac7b6700f60d39
Reviewed-on: https://go-review.googlesource.com/c/163917
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Consistent logic for handling both duplicate map keys and case values,
and eliminates ad hoc value hashing code.
Also makes cmd/compile consistent with go/types's handling of
duplicate constants (see #28085), which is at least an improvement
over the status quo even if we settle on something different for the
spec.
As a side effect, this also suppresses cmd/compile's warnings about
duplicate nils in (non-interface expression) switch statements, which
was technically never allowed by the spec anyway.
Updates #28085.
Updates #28378.
Change-Id: I176a251e770c3c5bc11c2bf8d1d862db8f252a17
Reviewed-on: https://go-review.googlesource.com/c/152544
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
CL 142497 renamed "statictmp_N" to ".stmp_N", but missed an instance
that was added by CL 151498 (submitted between the window that CL
142497 was reviewed/tested and later rebased/merged).
Change-Id: I597ee59dfa40821c7af2881b47e06f84a8140ec8
Reviewed-on: https://go-review.googlesource.com/c/163877
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
If the variables passed in to the cofactor arguments of GCD (x, y)
aliased the input arguments (a, b), the previous implementation would
result in incorrect results for y. This change reorganizes the calculation
so that the only case that need to be handled is when y aliases b, which
can be handled with a simple check.
Tests were added for all of the alias cases for input arguments and and
and irrelevant test case for a previous binary GCD calculation was dropped.
Fixes#30217
Change-Id: Ibe6137f09b3e1ae3c29e3c97aba85b67f33dc169
Reviewed-on: https://go-review.googlesource.com/c/162517
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The current ExampleCommentMap might panic if there are more satisfied
comments in the parsed program.
Change-Id: Ibe6943470aa0cfb450dae9fc07c1199acaabef73
GitHub-Last-Rev: c79e98c286
GitHub-Pull-Request: golang/go#28587
Reviewed-on: https://go-review.googlesource.com/c/147359
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
This change limits the capacity of the slices of bytes returned by:
- Find
- FindAll
- FindAllSubmatch
to be the same as their length.
Fixes#30169
Change-Id: I07b632757d2bfeab42fce0d42364e2a16c597360
Reviewed-on: https://go-review.googlesource.com/c/161877
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This will need to be updated from time to time as new targets are
added to gccgo. But that is better than always returning nil.
Change-Id: I04b8c4d0f8efa38e2a148eb2e38b16b09f0351c3
Reviewed-on: https://go-review.googlesource.com/c/158844
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Set element in slice to nil avoiding memory leak.
Change-Id: I9dbef9a0466407011e326725d3a0b681cd815389
GitHub-Last-Rev: 1bae5d3758
GitHub-Pull-Request: golang/go#30386
Reviewed-on: https://go-review.googlesource.com/c/163601
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This makes the tests slightly faster, though the bulk of the time is
still spent building the test programs.
Also run some tests in parallel.
Updates #26470
Change-Id: Ia5ec2b99831d69c426b43dbab80613aa03e705f5
Reviewed-on: https://go-review.googlesource.com/c/153258
Reviewed-by: Austin Clements <austin@google.com>
