Updates #61308
Change-Id: I92d459383c520d137787ce5c8f135d205af74e5d
Reviewed-on: https://go-review.googlesource.com/c/go/+/516596
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Reviewed-by: Ian Lance Taylor <iant@google.com>
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
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
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
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For #66585
Change-Id: Iddc407e3ef4c3b6ecf5173963b66b3e65e43c92d
Reviewed-on: https://go-review.googlesource.com/c/go/+/575336
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Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
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Change-Id: Ib199ce1a781e8e3a66d3dc8bda617e6bc30b290e
Reviewed-on: https://go-review.googlesource.com/c/go/+/539578
Auto-Submit: Ian Lance Taylor <iant@google.com>
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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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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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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>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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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
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
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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
Reviewed-on: https://go-review.googlesource.com/c/go/+/475675
Commit-Queue: Ian Lance Taylor <iant@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
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Commands run:
go get golang.org/x/telemetry@3640ba5
go mod vendor
go mod tidy
This pulls in golang.org/cl/574815, fixing #66344Fixes#66344
Change-Id: Ib5a0c4fc1e0bd44dbc13453ec1dade89a8d96f70
Reviewed-on: https://go-review.googlesource.com/c/go/+/575575
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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
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
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(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#41734Fixes#21782Fixes#36375
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Co-authored-by: Giovanni Bajo <rasky@develer.com>
Change-Id: I63cfb79f3ae6b9d42e07deac435b730d97a6f492
Reviewed-on: https://go-review.googlesource.com/c/go/+/574695
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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
GitHub-Pull-Request: golang/go#65224
Reviewed-on: https://go-review.googlesource.com/c/go/+/557597
Reviewed-by: Ian Lance Taylor <iant@google.com>
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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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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
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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.
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Change-Id: Ibc22e8a76c87e47bc9fafe4959804d9ea923623d
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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
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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
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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
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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
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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
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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>
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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>
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This is a follow-up to CL 574675.
Change-Id: I98c3ea968e9c7dc61472849c385a1e697568aa30
Reviewed-on: https://go-review.googlesource.com/c/go/+/574975
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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
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Change-Id: I1290ad66d3c758c3b89caf0a217cb3d5358c5dd2
Reviewed-on: https://go-review.googlesource.com/c/go/+/574696
Reviewed-by: Robert Griesemer <gri@google.com>
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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>
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The new code does not need a for-loop and is easier to read.
Change-Id: Ic182d63c4779c2179b721fcfaec362681284cc16
GitHub-Last-Rev: b3ee265df7
GitHub-Pull-Request: golang/go#63879
Reviewed-on: https://go-review.googlesource.com/c/go/+/538721
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sysctl machdep.cpu.brand_string seems to be standard
across the BSDs. There does not seem to be a standard
way to get the CPU frequency.
Change-Id: Ic986d6c81dd54e1b84544317f2a53ce16801319b
Reviewed-on: https://go-review.googlesource.com/c/go/+/520636
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
All of these maps and slices are made up of comparable types,
so we can avoid the overhead of reflection entirely.
Change-Id: If77dbe648a336ba729c171e84c9ff3f7e160297d
Reviewed-on: https://go-review.googlesource.com/c/go/+/574597
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This helps reduce confusion with cmd/internal/pgo, which performs
compilation-independent analysis. pgoir associates that data with the
IR from the current package compilation.
For #58102.
Change-Id: I9ef1c8bc41db466d3340f41f6d071b95c09566de
Reviewed-on: https://go-review.googlesource.com/c/go/+/569338
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
The processing performed in cmd/preprofile is a simple version of the
same initial processing performed by cmd/compile/internal/pgo. Refactor
this processing into the new IR-independent cmd/internal/pgo package.
Now cmd/preprofile and cmd/compile run the same code for initial
processing of a pprof profile, guaranteeing that they always stay in
sync.
Since it is now trivial, this CL makes one change to the serialization
format: the entries are ordered by weight. This allows us to avoid
sorting ByWeight on deserialization.
Impact on PGO parsing when compiling cmd/compile with PGO:
* Without preprocessing: PGO parsing ~13.7% of CPU time
* With preprocessing (unsorted): ~2.9% of CPU time (sorting ~1.7%)
* With preprocessing (sorted): ~1.3% of CPU time
The remaining 1.3% of CPU time approximately breaks down as:
* ~0.5% parsing the preprocessed profile
* ~0.7% building weighted IR call graph
* ~0.5% walking function IR to find direct calls
* ~0.2% performing lookups for indirect calls targets
For #58102.
Change-Id: Iaba425ea30b063ca195fb2f7b29342961c8a64c2
Reviewed-on: https://go-review.googlesource.com/c/go/+/569337
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
On Windows, File.readdir currently fails if the volume information
can't be retrieved via GetVolumeInformationByHandle and if the
directory path is relative and can't be converted to an absolute
path.
This change makes readdir more robust by not failing in these cases,
as these steps are just necessary to support a potential call to
os.SameFile, but not for the actual readdir operation. os.SameFile
will still fail in these cases, but that's a separate issue tracked
in #62042.
Change-Id: I8d98d8379bdac4b2832fa433432a5f027756abaa
Reviewed-on: https://go-review.googlesource.com/c/go/+/574155
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
For https://gcc.gnu.org/PR114453
Change-Id: If41d9fca6288b18ed47b0f21ff224c74ddb34958
Reviewed-on: https://go-review.googlesource.com/c/go/+/574536
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Change-Id: I1df0685c75fc1044ba46003a69ecc7dfc53bbc2b
Reviewed-on: https://go-review.googlesource.com/c/go/+/574675
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
