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59635 commits

Author SHA1 Message Date
Liam Miller-Cushon 37af15b947
Fix a dead URL in a comment in writer.go 2024-04-03 15:35:16 -07:00
apocelipes 885fdfc082 expvar: use slices to simplify the code
No effect on benchmarks.

Change-Id: I7454c21b25d5e44b9c4a39922ed470522f81872d
GitHub-Last-Rev: 5801b30dac
GitHub-Pull-Request: golang/go#66660
Reviewed-on: https://go-review.googlesource.com/c/go/+/575777
Reviewed-by: Keith Randall <khr@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
2024-04-03 21:36:09 +00:00
Alan Donovan 61a3ee5441 go/types: ObjectString: remove only 1 Alias for "type A = RHS"
As we migrate towards materialized Alias types, the ObjectString
for a type A such as
   type A = B
   type B = int
should be "type A = B", removing exactly one Alias constructor
from the type of A. (The previous behavior was "type A = int".)

I suspect the existing Alias.{Unalias,Underlying} API is
inadequate and that we will need an Alias.RHS accessor that
removes exactly one Alias. Other clients such as the import/
export packages will need it, because aliases are not
isomorphic to defined types, in which, given
   type A B
   type B int
the Underlying of A is indeed int. See #66559.

Change-Id: I11a4aacbe6dbeeafc3aee31b3c096296b5970cd8
Reviewed-on: https://go-review.googlesource.com/c/go/+/574716
Auto-Submit: Alan Donovan <adonovan@google.com>
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Reviewed-by: Robert Findley <rfindley@google.com>
2024-04-03 18:49:21 +00:00
Alan Donovan 6ffbcd8249 go/types: include link to source in generated files
This makes navigation a little easier.
Also, make the "inconsistent generated files" test's
error message more explicit about which file is which.

Change-Id: Iae1fb9e496fb68325448d807469a5b0c55ceda99
Reviewed-on: https://go-review.googlesource.com/c/go/+/574715
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2024-04-03 18:48:38 +00:00
Jes Cok 170862d683 slices: simplify slice expression for Replace
A slice expression of the form:
	s[a:len(s)]
will be simplified to:
	s[a:]
This is one of the simplifications that "gofmt -s" applies.

See https://pkg.go.dev/golang.org/x/tools/gopls/internal/analysis/simplifyslice

Change-Id: Ib3c01ecf24b84333fd1993a343450fc57fb8ac84
Reviewed-on: https://go-review.googlesource.com/c/go/+/575335
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2024-04-03 17:01:23 +00:00
cui fliter d8e47e257e fmt: add available godoc link
Change-Id: Ia7eaa654b44625983d09284d906a7b67ef589696
Reviewed-on: https://go-review.googlesource.com/c/go/+/535082
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-04-02 21:56:20 +00:00
Olivier Mengué cf8010d221 text/template: more godoc links
Change-Id: Ib8ea569b3cd92bbc9fa8a54f7da61207ba978bbe
Reviewed-on: https://go-review.googlesource.com/c/go/+/574796
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2024-04-02 21:54:08 +00:00
Cuong Manh Le d08a957298 all: add reflect.SliceAt function
Fixes #61308

Change-Id: Ic17d737fda055a60779985d5da497745c80d5cfa
Reviewed-on: https://go-review.googlesource.com/c/go/+/516597
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2024-04-02 21:51:18 +00:00
Cuong Manh Le 3d61f24835 reflect: handle String kind in Value.{Pointer,UnsafePointer}
Updates #61308

Change-Id: I92d459383c520d137787ce5c8f135d205af74e5d
Reviewed-on: https://go-review.googlesource.com/c/go/+/516596
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2024-04-02 21:51:14 +00:00
Tobias Klauser e074fcc945 internal/poll, net, os: remove poll.Splice syscall name return value
The sc return value of internal/poll.Splice is always set to the same
value "splice" in the error case and then passed to wrapSyscallError.
Move that value to the wrapSyscallError calls to simplify the code a
bit.

Change-Id: I98104d755da68ff9f301fabc43c2618fda21a175
Reviewed-on: https://go-review.googlesource.com/c/go/+/575655
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2024-04-02 21:49:26 +00:00
guoguangwu b6efc3b755 cmd/go/internal/modload: close modules.txt
Change-Id: Ieb4cf76f4d7050d2f3052c2f90e47901de74d641
GitHub-Last-Rev: 1e8dcfd651
GitHub-Pull-Request: golang/go#66629
Reviewed-on: https://go-review.googlesource.com/c/go/+/575475
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2024-04-02 20:07:23 +00:00
Cuong Manh Le 5038ce82b6 cmd/compile: add missing OASOP case in mayModifyPkgVar
CL 395541 made staticopy safe, stop applying the optimization once
seeing an expression that may modify global variables. However, it
misses the case for OASOP expression, causing the static init
mis-recognizes the modification and think it's safe.

Fixing this by adding missing OASOP case.

Fixes #66585

Change-Id: I603cec018d3b5a09825c14e1f066a0e16f8bde23
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest
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2024-04-02 17:16:14 +00:00
Cuong Manh Le 973befe714 cmd/compile: check ODEREF for safe lhs in assignment during static init
For #66585

Change-Id: Iddc407e3ef4c3b6ecf5173963b66b3e65e43c92d
Reviewed-on: https://go-review.googlesource.com/c/go/+/575336
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2024-04-02 17:12:59 +00:00
Austin Clements 94dba61276 internal/abi: clean up type of Kind and Type.Kind_
Currently, Type.Kind_ is a uint8, Kind is a uint, and some of the
abi.Kind consts are not of type Kind. Clean this all up by making Kind
a uint8, then making Type.Kind a Kind, and finally making all Kind
consts actually have type Kind. This has some ripple effect, but I
think all of the changes are improvements.

Change-Id: If39be74699c2cdb52bf0ad7092d392bc8fb68d15
Reviewed-on: https://go-review.googlesource.com/c/go/+/575579
Auto-Submit: Austin Clements <austin@google.com>
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2024-04-02 16:25:18 +00:00
guoguangwu cb6d15a747 cmd/compile/internal/ssa: fix typos in comment and log
Change-Id: Ic872bac2989ea1c83f31456eb334e6d756ebd7d1
GitHub-Last-Rev: d409884979
GitHub-Pull-Request: golang/go#66612
Reviewed-on: https://go-review.googlesource.com/c/go/+/575296
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2024-04-02 16:11:47 +00:00
cui fliter e0cd90528e reflect: add available godoc link
Change-Id: Ib199ce1a781e8e3a66d3dc8bda617e6bc30b290e
Reviewed-on: https://go-review.googlesource.com/c/go/+/539578
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2024-04-02 15:20:05 +00:00
qiulaidongfeng daaf1f2220 all: use kind* of abi
For #59670

Change-Id: Id66e102f13e529dd041b68ce869026a56f0a1b9b
GitHub-Last-Rev: 43aa9376f7
GitHub-Pull-Request: golang/go#65564
Reviewed-on: https://go-review.googlesource.com/c/go/+/562298
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2024-04-02 15:10:48 +00:00
Tobias Klauser e3ec1ca17e os: define wrapSyscallError only on linux
wrapSyscallError by now is only used on linux in the methods defined in
os/zero_copy_linux.go. Move the definition there.

Change-Id: I0ca5749adaac44e8d095b8452458b647f595d3c8
Reviewed-on: https://go-review.googlesource.com/c/go/+/575595
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2024-04-02 15:01:40 +00:00
Shengyu Zhang 88b1d6115a encoding/json: prevent duplicate slicebytetostring
When storing literal to JSON number v, if s is valid number, the slicebytetostring operation will be performed twice. In fact, the operation is unavoidable on any code path, so just perform it at the very beginning.

This is not a big optimization, but better than nothing:

    $ ../bin/go test ./encoding/json/ -bench UnmarshalNumber -run NOTEST -benchtime 10000000x -count 16  > old.txt
    $ ../bin/go test ./encoding/json/ -bench UnmarshalNumber -run NOTEST -benchtime 10000000x -count 16  > new.txt
    $ benchstat old.txt new.txt
                      │   old.txt   │              new.txt               │
                      │   sec/op    │   sec/op     vs base               │
    UnmarshalNumber-8   234.5n ± 3%   228.2n ± 4%  -2.67% (p=0.033 n=16)

                      │  old.txt   │            new.txt             │
                      │    B/op    │    B/op     vs base            │
    UnmarshalNumber-8   168.0 ± 0%   168.0 ± 0%  ~ (p=1.000 n=16) ¹
    ¹ all samples are equal

                      │  old.txt   │            new.txt             │
                      │ allocs/op  │ allocs/op   vs base            │
    UnmarshalNumber-8   2.000 ± 0%   2.000 ± 0%  ~ (p=1.000 n=16) ¹
    ¹ all samples are equal

Change-Id: I1dfdb1ed0883e385f753b2046b7f047c792aa4e3
GitHub-Last-Rev: d236dd7265
GitHub-Pull-Request: golang/go#61242
Reviewed-on: https://go-review.googlesource.com/c/go/+/508556
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2024-04-02 15:00:17 +00:00
Olivier Mengué 0611816216 regexp/syntax: cleanup code generation in perl_groups.go
Cleanup code generation of perl_groups.go:
* Fix the generated code header to follow the standard https://go.dev/s/generatedcode
* Apply gofmt as last step of code generation
* Add //go:generate lines in parse.go to trigger code generation
* Adapt make_perl_groups.pl to handle writing directly to the output
  file (as we can't use shell redirection in go:generate lines)
* use strict; use warnings;

Change-Id: I675241da03dd3f6facc9eb9de00999bd9203ad70
Reviewed-on: https://go-review.googlesource.com/c/go/+/555995
Reviewed-by: Bryan Mills <bcmills@google.com>
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2024-04-02 13:59:01 +00:00
aimuz be50b58d70 internal/zstd: optimize window reset using make for buffer allocation
Optimize the zstd window's reset function to use `make` for buffer
allocation when needed. This ensures efficient memory usage by
conditionally reallocating the buffer based on its capacity, improving
performance in scenarios where the existing buffer is insufficient.

```
goos: darwin
goarch: amd64
pkg: internal/zstd
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
         │   old.out   │            new.out            │
         │   sec/op    │   sec/op     vs base          │
Large-12   7.299m ± 5%   7.235m ± 1%  ~ (p=0.353 n=10)

         │   old.out    │            new.out             │
         │     B/s      │     B/s       vs base          │
Large-12   35.56Mi ± 4%   35.87Mi ± 1%  ~ (p=0.353 n=10)

         │   old.out    │               new.out                │
         │     B/op     │     B/op      vs base                │
Large-12   68.86Ki ± 4%   15.87Ki ± 1%  -76.95% (p=0.000 n=10)

         │  old.out   │            new.out             │
         │ allocs/op  │ allocs/op   vs base            │
Large-12   0.000 ± 0%   0.000 ± 0%  ~ (p=1.000 n=10) ¹
¹ all samples are equal
```

Change-Id: Icd9c278b42ea149107a9861d006f40129c59831b
GitHub-Last-Rev: c00344cca4
GitHub-Pull-Request: golang/go#64221
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2024-04-02 13:49:23 +00:00
Alan Donovan 3b29222ffd cmd: update vendored x/tools to 904c6ba
This fixes one of the many obstacles to enabling
types.Alias by updating vet.

The 'loopclosure' checker (formerly 'rangeloop') no longer
reports any findings with go1.22, so the test needed work
to ensure that it still runs on files with go1.21 semantics.

Updates #65294

Change-Id: I987ff529d4e165b56b7241563c6003e63bf92bb1
Reviewed-on: https://go-review.googlesource.com/c/go/+/575315
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2024-04-02 02:20:05 +00:00
Mohammad Abbasi e565720e49 database/sql: refactor unused variables to use blank identifiers
Hi
I've replaced unused variables in database/sql with blank identifiers to improve code readability.

This change has no impact on the functionality of the code, but makes it easier to read and understand.

Change-Id: I701e93fd9bf86725f411085bf2e8f8e6b235af14
GitHub-Last-Rev: eb40bd5e2e
GitHub-Pull-Request: golang/go#58986
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2024-04-02 01:32:55 +00:00
Michael Matloob cd294f55ca cmd: update and vendor golang.org/x/telemetry@3640ba5
Commands run:
	go get golang.org/x/telemetry@3640ba5
	go mod vendor
	go mod tidy

This pulls in golang.org/cl/574815, fixing #66344

Fixes #66344

Change-Id: Ib5a0c4fc1e0bd44dbc13453ec1dade89a8d96f70
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2024-04-01 20:28:41 +00:00
Paul E. Murphy dfb17c126c cmd/compile: support float min/max instructions on PPC64
This enables efficient use of the builtin min/max function
for float64 and float32 types on GOPPC64 >= power9.

Extend the assembler to support xsminjdp/xsmaxjdp and use
them to implement float min/max.

Simplify the VSX xx3 opcode rules to allow FPR arguments,
if all arguments are an FPR.

Change-Id: I15882a4ce5dc46eba71d683cf1d184dc4236a328
Reviewed-on: https://go-review.googlesource.com/c/go/+/574535
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2024-04-01 18:50:29 +00:00
guoguangwu a49952445f cmd/compile: close files in the startProfile function
Change-Id: I803d625249890c88fbf35394a85e0b2952123620
GitHub-Last-Rev: 239b28e857
GitHub-Pull-Request: golang/go#66532
Reviewed-on: https://go-review.googlesource.com/c/go/+/574336
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2024-04-01 17:19:20 +00:00
qmuntal 7c89ad6a80 os: support relative paths in fixLongPath
(This CL takes the tests and some ideas from the abandoned CL 263538).

fixLongPath is used on Windows to process all path names
before syscalls to switch them to extended-length format
(with prefix \\?\) to workaround a historical limit
of 260-ish characters.

This CL updates fixLongPath to convert relative paths to absolute
paths if the working directory plus the relative path exceeds
MAX_PATH. This is necessary because the Windows API does not
support extended-length paths for relative paths.

This CL also adds support for fixing device paths (\\.\-prefixed),
which were not previously normalized.

Fixes #41734
Fixes #21782
Fixes #36375

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2024-04-01 14:34:38 +00:00
apocelipes 6bfaafd3c3 database/sql: use slices to simplify the code
Change-Id: Ia198272330626271ee7d4e1ae46afca819ab2933
GitHub-Last-Rev: e713ac3163
GitHub-Pull-Request: golang/go#66572
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2024-04-01 12:38:07 +00:00
Kévin Dunglas d49a14c609 cmd/cgo: update outdated docs about cgocheck2
Setting GODEBUG=cgocheck=2 now panics with a message
such as "fatal error: cgocheck > 1 mode is no longer supported at runtime.
Use GOEXPERIMENT=cgocheck2 at build time instead."

Change-Id: If9a5a96933973e14a1a60b8e9fb6a1f4a818cf59
GitHub-Last-Rev: 787d62454c
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2024-03-31 09:02:45 +00:00
guoguangwu ba9c445f16 cmd/go: close elf file in the readpkglist function
Change-Id: Ief08e311598152f047878fc0fe6a6e37df372ee9
GitHub-Last-Rev: daec402b39
GitHub-Pull-Request: golang/go#66588
Reviewed-on: https://go-review.googlesource.com/c/go/+/575156
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Auto-Submit: Ian Lance Taylor <iant@google.com>
2024-03-30 00:20:35 +00:00
Cuong Manh Le 0bf6071066 Revert "cmd/compile/internal: merge stack slots for selected local auto vars"
This reverts CL 553055.

Reason for revert: causes crypto/ecdsa failures on linux ppc64/s390x builders

Change-Id: I9266b030693a5b6b1e667a009de89d613755b048
Reviewed-on: https://go-review.googlesource.com/c/go/+/575236
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Than McIntosh <thanm@google.com>
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2024-03-30 00:11:00 +00:00
Than McIntosh 89f7805c2e cmd/compile/internal: merge stack slots for selected local auto vars
Preliminary compiler support for merging/overlapping stack
slots of local variables whose access patterns are disjoint.

This patch includes changes in AllocFrame to do the actual
merging/overlapping based on information returned from a new
liveness.MergeLocals helper. The MergeLocals helper identifies
candidates by looking for sets of AUTO variables that either A) have
the same size and GC shape (if types contain pointers), or B) have the
same size (but potentially different types as long as those types have
no pointers). Variables must be greater than (3*types.PtrSize) in size
to be considered for merging.

After forming candidates, MergeLocals collects variables into "can be
overlapped" equivalence classes or partitions; this process is driven
by an additional liveness analysis pass. Ideally it would be nice to
move the existing stackmap liveness pass up before AllocFrame
and "widen" it to include merge candidates so that we can do just a
single liveness as opposed to two passes, however this may be difficult
given that the merge-locals liveness has to take into account
writes corresponding to dead stores.

This patch also required a change to the way ssa.OpVarDef pseudo-ops
are generated; prior to this point they would only be created for
variables whose type included pointers; if stack slot merging is
enabled then the ssagen code creates OpVarDef ops for all auto vars
that are merge candidates.

Note that some temporaries created late in the compilation process
(e.g. during ssa backend) are difficult to reason about, especially in
cases where we take the address of a temp and pass it to the runtime.
For the time being we mark most of the vars created post-ssagen as
"not a merge candidate".

Stack slot merging for locals/autos is enabled by default if "-N" is
not in effect, and can be disabled via "-gcflags=-d=mergelocals=0".

Fixmes/todos/restrictions:
- try lowering size restrictions
- re-evaluate the various skips that happen in SSA-created autotmps

Fixes #62737.
Updates #65532.
Updates #65495.

Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest
Change-Id: Ibc22e8a76c87e47bc9fafe4959804d9ea923623d
Reviewed-on: https://go-review.googlesource.com/c/go/+/553055
Reviewed-by: Cherry Mui <cherryyz@google.com>
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2024-03-29 23:09:29 +00:00
Daniel Martí 754f870381 crypto/tls,regexp: remove always-nil error results
These were harmless, but added unnecessary verbosity to the code.
This can happen as a result of refactors: for example,
the method sessionState used to return errors in some cases.

Change-Id: I4e6dacc01ae6a49b528c672979f95cbb86795a85
Reviewed-on: https://go-review.googlesource.com/c/go/+/528995
Reviewed-by: Leo Isla <islaleo93@gmail.com>
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Reviewed-by: Olivier Mengué <olivier.mengue@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: qiulaidongfeng <2645477756@qq.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
2024-03-29 22:22:45 +00:00
Than McIntosh dcf046f021 cmd/compile/internal: refactor coverage ir.Name flags
Minor refactoring to eliminate one of the ir.Name flag values used
when building in coverage mode (no changes to functionality). This is
intended to free up a bit in the uint16 flags field to be used in a
subsequent patch.

Change-Id: I4aedb9a55fde24c808ff3f7b077ee0552aa979af
Reviewed-on: https://go-review.googlesource.com/c/go/+/572055
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-03-29 21:55:46 +00:00
Than McIntosh 7979c8f588 cmd/compile/internal/liveness: introduce "live intervals" utility
Introduce a helper type "Intervals" that contains sets of sorted
disjoint ranges corresponding to live ranges within a function.
Example: the Intervals set "{ [0,1), [4,10) }" would indicate that
something is live starting at instruction 0, then up to but not
including instruction 1, then dead from 1-3, then live again at
instruction 4 up to (but not including) instruction 10.

This patch provides APIs for constructing interval sets, testing to
see whether two sets overlap, and unioning/merging together two
intervals sets.

Updates #62737.
Updates #65532.
Updates #65495.

Change-Id: I7140a5989eba93bf3b8762d9224261f5eba0646d
Reviewed-on: https://go-review.googlesource.com/c/go/+/566177
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-03-29 21:55:27 +00:00
Than McIntosh 593daf785f cmd/compiler/internal/ssagen: refactor code to sort stack vars
Minor refactoring of the code that sorts stack variables to move
from sort.Stable to sort.SliceStable. No change in semantics; this
is intended to lay the groundwork for a future change.

Change-Id: I9eb920e3b3029a734fbe0e0e88c0d57ea3452599
Reviewed-on: https://go-review.googlesource.com/c/go/+/566176
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-03-29 21:55:16 +00:00
Than McIntosh 29fcd1569a Revert "cmd/compile: add missing OINLCAll case in mayModifyPkgVar"
This reverts CL 575175.

Reason for revert: causes crypto/ecdh failures on longtest builders.

Change-Id: Ieed326fedf91760ac73095a42ba0237cf969843b
Reviewed-on: https://go-review.googlesource.com/c/go/+/575316
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Than McIntosh <thanm@google.com>
2024-03-29 21:53:14 +00:00
Cuong Manh Le 9a028e14a5 cmd/compile: add missing OINLCAll case in mayModifyPkgVar
CL 395541 made staticopy safe, stop applying the optimization once
seeing an expression that may modify global variables.

However, if a call expression was inlined, the analyzer mis-recognizes
and think that the expression is safe. For example:

	var x = 0
	var a = f()
	var b = x

are re-written to:

	var x = 0
	var a = ~r0
	var b = 0

even though it's not safe because "f()" may modify "x".

Fixing this by recognizing OINLCALL and mark the initialization as
not safe for staticopy.

Fixes #66585

Change-Id: Id930c0b7e74274195f54a498cc4c5a91c4e6d84d
Reviewed-on: https://go-review.googlesource.com/c/go/+/575175
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-03-29 16:46:47 +00:00
Daniel Martí 27c7a3dcc3 regexp/syntax: use the Regexp.Equal static method directly
A follow-up for the recent https://go.dev/cl/573978.

Change-Id: I0e75ca0b37d9ef063bbdfb88d4d2e34647e0ee50
Reviewed-on: https://go-review.googlesource.com/c/go/+/574677
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2024-03-29 16:41:51 +00:00
Jes Cok 2830d5457e runtime: make use of builtin clear in tests
This is a follow-up to CL 574675.

Change-Id: I98c3ea968e9c7dc61472849c385a1e697568aa30
Reviewed-on: https://go-review.googlesource.com/c/go/+/574975
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Jes Cok <xigua67damn@gmail.com>
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TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
2024-03-29 16:41:12 +00:00
guoguangwu 8f59b28fb3 cmd/cgo: close the file opened in the dynimport function
Change-Id: Ic457e994b50a0e8c1769311937eede1e710a1293
GitHub-Last-Rev: a8af7b5e67
GitHub-Pull-Request: golang/go#66549
Reviewed-on: https://go-review.googlesource.com/c/go/+/574537
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Emmanuel Odeke <emmanuel@orijtech.com>
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2024-03-29 16:41:10 +00:00
Russ Cox d0051be847 runtime: simplify timers.siftDown
No effect on benchmarks, but the code is clearer.

goos: linux
goarch: amd64
pkg: time
cpu: AMD Ryzen 9 7950X 16-Core Processor
                                   │  s7base.txt  │               s7.txt                │
                                   │    sec/op    │    sec/op     vs base               │
AdjustTimers10000-32                 195.9µ ± 13%   198.1µ ±  2%       ~ (p=0.436 n=10)
AdjustTimers10000SingleThread-32     1.573m ± 13%   1.566m ± 10%       ~ (p=0.739 n=10)
AdjustTimers10000NoReset-32          170.6µ ±  1%   170.4µ ±  1%       ~ (p=0.912 n=10)
AdjustTimers10000NoSleep-32          183.9µ ±  2%   181.4µ ±  2%  -1.39% (p=0.045 n=10)
AdjustTimers10000NoResetNoSleep-32   151.3µ ±  1%   150.0µ ±  1%  -0.90% (p=0.007 n=10)

goos: darwin
goarch: arm64
pkg: time
cpu: Apple M3 Pro
                                   │ m3base.txt  │               m3.txt               │
                                   │   sec/op    │   sec/op     vs base               │
AdjustTimers10000-12                 234.2µ ± 1%   234.5µ ± 1%       ~ (p=0.796 n=10)
AdjustTimers10000SingleThread-12     1.191m ± 1%   1.272m ± 1%  +6.81% (p=0.000 n=10)
AdjustTimers10000NoReset-12          239.6µ ± 2%   236.3µ ± 9%       ~ (p=0.971 n=10)
AdjustTimers10000NoSleep-12          223.3µ ± 2%   221.4µ ± 3%       ~ (p=0.579 n=10)
AdjustTimers10000NoResetNoSleep-12   209.2µ ± 2%   209.0µ ± 4%       ~ (p=0.796 n=10)


Change-Id: Id48aa893235d652814b7fa4605037f09b0b4d73b
Reviewed-on: https://go-review.googlesource.com/c/go/+/574897
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2024-03-29 14:36:24 +00:00
Russ Cox bb7a29991c runtime: move whenHeap into heap slice
This CL changes the timer heap from a slice of timers to a slice
of {timer, when} pairs, moving timer.whenHeap into the heap
backing store itself. This makes the ownership clearer (t.whenHeap
was always protected by the heap lock, not the timer's lock)
and also avoids an indirection when doing heap operations,
which look at the when field quite a lot.

goos: linux
goarch: amd64
pkg: time
cpu: AMD Ryzen 9 7950X 16-Core Processor
                                   │  s7base.txt  │                s7.txt                │
                                   │    sec/op    │    sec/op     vs base                │
AdjustTimers10000-32                 244.1µ ±  5%   195.9µ ± 13%  -19.76% (p=0.001 n=10)
AdjustTimers10000SingleThread-32     1.674m ±  6%   1.573m ± 13%   -6.03% (p=0.001 n=10)
AdjustTimers10000NoReset-32          194.0µ ±  2%   170.6µ ±  1%  -12.06% (p=0.000 n=10)
AdjustTimers10000NoSleep-32          223.0µ ±  7%   183.9µ ±  2%  -17.54% (p=0.000 n=10)
AdjustTimers10000NoResetNoSleep-32   181.1µ ±  1%   151.3µ ±  1%  -16.45% (p=0.000 n=10)

goos: darwin
goarch: arm64
pkg: time
cpu: Apple M3 Pro
                                   │ m3base.txt  │               m3.txt                │
                                   │   sec/op    │   sec/op     vs base                │
AdjustTimers10000-12                 266.6µ ± 2%   234.2µ ± 1%  -12.16% (p=0.000 n=10)
AdjustTimers10000SingleThread-12     1.194m ± 0%   1.191m ± 1%   -0.33% (p=0.029 n=10)
AdjustTimers10000NoReset-12          260.9µ ± 2%   239.6µ ± 2%   -8.15% (p=0.000 n=10)
AdjustTimers10000NoSleep-12          247.8µ ± 2%   223.3µ ± 2%   -9.90% (p=0.000 n=10)
AdjustTimers10000NoResetNoSleep-12   231.7µ ± 2%   209.2µ ± 2%   -9.68% (p=0.000 n=10)

Change-Id: I546f077068476d7a7b855889419b292525fb2bc5
Reviewed-on: https://go-review.googlesource.com/c/go/+/574896
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2024-03-29 14:35:56 +00:00
Jes Cok bb523c9542 net/http: correct doc for ServeFileFS
The documentation of ServeFileFS was partly copied from ServeFile
in CL 513956, however it's not exact. This CL fixes some typos, also
removes obsolete comment for name param.

For consistency, also adds godoc link for ServeFile and ServeContent.

Fixes #66578

Change-Id: I87147d72c533d46284f06ef20b37fdafa8706710
Reviewed-on: https://go-review.googlesource.com/c/go/+/575016
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
2024-03-29 00:17:10 +00:00
Keith Randall 8f618c1f53 cmd/compile: put constants before variables in initialization order
Fixes #66575

Change-Id: I03f4d4577b88ad0a92b260b2efd0cb9fe5082b2f
Reviewed-on: https://go-review.googlesource.com/c/go/+/575075
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-03-28 22:06:51 +00:00
Olivier Mengué 3f90ba7f1f go/ast: more godoc links
Change-Id: I1290ad66d3c758c3b89caf0a217cb3d5358c5dd2
Reviewed-on: https://go-review.googlesource.com/c/go/+/574696
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
2024-03-28 21:32:41 +00:00
Russ Cox fae6eb5f2f runtime: fix timer race introduced in CL 573455
There is a short window when timers.adjust could miss a
timer update. Close that window. Does not change benchmark.

goos: linux
goarch: amd64
pkg: time
cpu: AMD Ryzen 9 7950X 16-Core Processor
                                   │ s7base.txt  │               s7.txt                │
                                   │   sec/op    │    sec/op     vs base               │
AdjustTimers10000-32                 239.9µ ± 5%   237.6µ ±  8%       ~ (p=0.631 n=10)
AdjustTimers10000SingleThread-32     1.686m ± 8%   1.710m ±  5%       ~ (p=0.481 n=10)
AdjustTimers10000NoReset-32          194.1µ ± 1%   190.8µ ±  2%  -1.69% (p=0.023 n=10)
AdjustTimers10000NoSleep-32          226.2µ ± 3%   222.9µ ±  3%       ~ (p=0.143 n=10)
AdjustTimers10000NoResetNoSleep-32   182.9µ ± 1%   180.9µ ±  2%       ~ (p=0.165 n=10)

goos: darwin
goarch: arm64
pkg: time
cpu: Apple M3 Pro
                                   │ m3base.txt  │               m3.txt               │
                                   │   sec/op    │   sec/op     vs base               │
AdjustTimers10000-12                 269.3µ ± 2%   267.0µ ± 2%       ~ (p=0.529 n=10)
AdjustTimers10000SingleThread-12     1.176m ± 1%   1.213m ± 1%  +3.15% (p=0.000 n=10)
AdjustTimers10000NoReset-12          262.6µ ± 2%   261.4µ ± 3%       ~ (p=0.123 n=10)
AdjustTimers10000NoSleep-12          247.8µ ± 1%   246.5µ ± 1%       ~ (p=0.393 n=10)
AdjustTimers10000NoResetNoSleep-12   231.0µ ± 1%   232.3µ ± 1%       ~ (p=0.684 n=10)

Change-Id: Ifdfcdd5a25046027912a8b306644bde7ec2d3214
Reviewed-on: https://go-review.googlesource.com/c/go/+/574741
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2024-03-28 21:25:26 +00:00
Russ Cox 77d9cb8937 runtime: adjust when timers.adjust is called
This new logic more closely mimics what we did before my CL stack.
I had reasoned that certainly

	ts.adjust(now, force=true)
	ts.run(now)

would be faster than

	ts.adjust(now, force=false)
	ts.run(now)
	ts.adjust(now, force=true)

But certainty is just an emotion, and that turns out not to be the case.

I don't really understand why the second sequence is faster,
but it definitely is, so put it back.

goos: linux
goarch: amd64
pkg: time
cpu: AMD Ryzen 9 7950X 16-Core Processor
                                   │ s7base.txt  │               s7.txt               │
                                   │   sec/op    │   sec/op     vs base               │
AdjustTimers10000-32                 263.3µ ± 4%   239.9µ ± 5%  -8.87% (p=0.000 n=10)
AdjustTimers10000SingleThread-32     1.742m ± 3%   1.686m ± 8%       ~ (p=0.105 n=10)
AdjustTimers10000NoReset-32          192.2µ ± 2%   194.1µ ± 1%  +1.00% (p=0.009 n=10)
AdjustTimers10000NoSleep-32          237.0µ ± 2%   226.2µ ± 3%  -4.55% (p=0.001 n=10)
AdjustTimers10000NoResetNoSleep-32   185.2µ ± 1%   182.9µ ± 1%  -1.23% (p=0.003 n=10)


goos: darwin
goarch: arm64
pkg: time
cpu: Apple M3 Pro
                                   │ m3base.txt  │               m3.txt               │
                                   │   sec/op    │   sec/op     vs base               │
AdjustTimers10000-12                 272.6µ ± 3%   269.3µ ± 2%       ~ (p=0.063 n=10)
AdjustTimers10000SingleThread-12     1.126m ± 1%   1.176m ± 1%  +4.42% (p=0.000 n=10)
AdjustTimers10000NoReset-12          255.1µ ± 2%   262.6µ ± 2%  +2.96% (p=0.000 n=10)
AdjustTimers10000NoSleep-12          250.2µ ± 2%   247.8µ ± 1%       ~ (p=0.063 n=10)
AdjustTimers10000NoResetNoSleep-12   230.3µ ± 1%   231.0µ ± 1%       ~ (p=0.280 n=10)

Change-Id: I67b5765f97dfca0142ee38e15a9904b520f51e83
Reviewed-on: https://go-review.googlesource.com/c/go/+/574740
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-03-28 21:25:23 +00:00
Russ Cox 97f1b76b4b runtime: optimize timers.cleanHead
goos: linux
goarch: amd64
pkg: time
cpu: AMD Ryzen 9 7950X 16-Core Processor
                                   │ s7base.txt  │               s7.txt                │
                                   │   sec/op    │   sec/op     vs base                │
AdjustTimers10000-32                 291.4µ ± 5%   263.3µ ± 4%   -9.64% (p=0.000 n=10)
AdjustTimers10000SingleThread-32     1.728m ± 5%   1.742m ± 3%        ~ (p=0.796 n=10)
AdjustTimers10000NoReset-32          253.1µ ± 6%   192.2µ ± 2%  -24.07% (p=0.000 n=10)
AdjustTimers10000NoSleep-32          277.3µ ± 3%   237.0µ ± 2%  -14.54% (p=0.000 n=10)
AdjustTimers10000NoResetNoSleep-32   241.4µ ± 2%   185.2µ ± 1%  -23.30% (p=0.000 n=10)

goos: darwin
goarch: arm64
pkg: time
cpu: Apple M3 Pro
                                   │ m3base.txt  │               m3.txt                │
                                   │   sec/op    │   sec/op     vs base                │
AdjustTimers10000-12                 288.1µ ± 1%   272.6µ ± 3%   -5.38% (p=0.000 n=10)
AdjustTimers10000SingleThread-12     1.195m ± 1%   1.126m ± 1%   -5.74% (p=0.000 n=10)
AdjustTimers10000NoReset-12          280.8µ ± 1%   255.1µ ± 2%   -9.14% (p=0.000 n=10)
AdjustTimers10000NoSleep-12          292.5µ ± 1%   250.2µ ± 2%  -14.47% (p=0.000 n=10)
AdjustTimers10000NoResetNoSleep-12   279.8µ ± 2%   230.3µ ± 1%  -17.69% (p=0.000 n=10)

Change-Id: I36edb40ee2cd11ab44d20bff045fa77609dca648
Reviewed-on: https://go-review.googlesource.com/c/go/+/574739
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-03-28 21:25:21 +00:00
Russ Cox 84b190ad3c runtime: avoid unnecessary netpoll wakeups during timer creation
goos: linux
goarch: amd64
pkg: time
cpu: AMD Ryzen 9 7950X 16-Core Processor
                                   │ s7base.txt  │               s7.txt               │
                                   │   sec/op    │   sec/op     vs base               │
AdjustTimers10000-32                 315.1µ ± 4%   291.4µ ± 5%  -7.52% (p=0.001 n=10)
AdjustTimers10000SingleThread-32     1.728m ± 6%   1.728m ± 5%       ~ (p=0.971 n=10)
AdjustTimers10000NoReset-32          263.0µ ± 3%   253.1µ ± 6%  -3.75% (p=0.023 n=10)
AdjustTimers10000NoSleep-32          306.8µ ± 5%   277.3µ ± 3%  -9.62% (p=0.000 n=10)
AdjustTimers10000NoResetNoSleep-32   245.3µ ± 3%   241.4µ ± 2%       ~ (p=0.529 n=10)

goos: darwin
goarch: arm64
pkg: time
cpu: Apple M3 Pro
                                   │ m3base.txt  │               m3.txt                │
                                   │   sec/op    │   sec/op     vs base                │
AdjustTimers10000-12                 385.5µ ± 3%   288.1µ ± 1%  -25.26% (p=0.000 n=10)
AdjustTimers10000SingleThread-12     1.213m ± 1%   1.195m ± 1%   -1.45% (p=0.001 n=10)
AdjustTimers10000NoReset-12          346.4µ ± 5%   280.8µ ± 1%  -18.94% (p=0.000 n=10)
AdjustTimers10000NoSleep-12          362.6µ ± 1%   292.5µ ± 1%  -19.33% (p=0.000 n=10)
AdjustTimers10000NoResetNoSleep-12   317.3µ ± 8%   279.8µ ± 2%  -11.79% (p=0.000 n=10)


Change-Id: Id3e10abfb1024f8e7883c8c366d941e4f1c2a894
Reviewed-on: https://go-review.googlesource.com/c/go/+/574738
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Russ Cox <rsc@golang.org>
2024-03-28 21:25:17 +00:00