Here begins a pretty major rewrite of the prove pass. The fundamental
observation is that although keeping facts about relations between
two SSA values could use O(n^2) space, keeping facts about relations
between an SSA value and constants needs only O(n) space. We can just
keep track of min/max for every SSA value at little cost.
Redo the limit table to just keep track of limits for all SSA values.
Use just a slice instead of a map. It may use more space (but still
just O(n) space), but accesses are a lot faster. And with the cache
in the compiler, that space will be reused quickly.
This is part of my planning to add lots more constant limits in the
prove pass.
Change-Id: Ie36819fad5631a8b79c3630fe0e819521796551a
Reviewed-on: https://go-review.googlesource.com/c/go/+/599255
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On linux/loong64, the sc_extcontext member in the sigcontext structure is
required to be 16-byte aligned [1], although sc_extcontext is not currently
used anywhere, it still needs to be padded to the specified alignment.
[1] https://github.com/torvalds/linux/blob/master/arch/loongarch/include/uapi/asm/sigcontext.h
Change-Id: I98d30e921730314835c9469a6f28e186c9808e34
Reviewed-on: https://go-review.googlesource.com/c/go/+/591855
Reviewed-by: Qiqi Huang <huangqiqi@loongson.cn>
Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
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The syntax parser complains about invalid identifiers.
Don't report a typechecker error when such an identifier
cannot be found in the current scope.
For now add a local test for types2 only because the
go/parser behaves differently than the syntax parser
which leads to slightly different error positions.
Fixes#68183.
Change-Id: Idbfe62fafcd704886069182744ec5e6b37ffc4e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/602476
Auto-Submit: Robert Griesemer <gri@google.com>
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When producing an ImportPathError from ImportErrorf, we check to see
whether the error string contains the path for the error. The issue is
that we were checking for the exact path string when sometimes the
string is quoted when the error is constructed, and the escaping in the
quote may not match the path string. Check for both the path string, and
the quoted path string.
Fixes#68737
Change-Id: I01bf4e495056e929570bc11bc1f2000ce6d2802b
Reviewed-on: https://go-review.googlesource.com/c/go/+/603475
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This CL does some minor refactoring of the code handling
wasmimport.
- Put the WasmImport aux reading and writing code together for
symmetry.
- Define WasmFuncType, embedded in WasmImport. WasmFuncType could
also be used (later) for wasmexport.
- Move code generation code to a separate function. The containing
function is already pretty large.
- Simplify linker code a little bit. The loader convention is to
return the 0 Sym for nonexistent symbol, instead of a separate
boolean.
No change in generated code. Passes toolstash -cmp
(GOARCH=wasm GOOS=wasip1 go build -toolexec "toolstash -cmp" -a std cmd).
Change-Id: Idc2514f84a08621333841ae4034b81130e0ce411
Reviewed-on: https://go-review.googlesource.com/c/go/+/603135
Reviewed-by: Than McIntosh <thanm@golang.org>
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Change-Id: I4ee61bea9997b822aa1ec2cc3d01b4db5f101e4c
GitHub-Last-Rev: d88282a92e
GitHub-Pull-Request: golang/go#68696
Reviewed-on: https://go-review.googlesource.com/c/go/+/602315
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Apparently people don't tend to pass untyped constant expressions
to panic.
For #68734
Change-Id: I6fff8137a0f001391de9e61860b67026a9db08c2
Reviewed-on: https://go-review.googlesource.com/c/go/+/603096
Reviewed-by: David Chase <drchase@google.com>
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Change-Id: I016672af79d49a00ddc2d0449cdaac61e98b4ba0
GitHub-Last-Rev: 38d15d9a03
GitHub-Pull-Request: golang/go#68730
Reviewed-on: https://go-review.googlesource.com/c/go/+/602698
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Fixes#68548
Add GOENV=off, GOFLAGS= to the build of the stdlib, so that it matches
what runcmd does. This ensures that the runtime and the test are built
with the same flags. As opposed to before this CL, where flags were used
in the stdlib build but not the runcmd build.
(Part of the problem here is that cmd/internal/testdir/testdir_test.go
plays fast and loose with the build cache to make the tests run faster.
Maybe some of that fast-and-loose mechanism can be removed now that we
have a better build cache? I'm not sure.)
Change-Id: I449d4ff517c69311d0aa4411e7fb96c0cca49269
Reviewed-on: https://go-review.googlesource.com/c/go/+/600276
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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CL 586257 converted days to uint32 which is usually fine but fails for
negative days close to cycle boundaries.
Fixes#68718
Change-Id: I8dc5b8fe0c7c1921beb204da1913b9a1ab39280d
Reviewed-on: https://go-review.googlesource.com/c/go/+/602815
Reviewed-by: Rob Pike <r@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Use strings to simplify the code.
This is a follow-up for the CL 586715.
Change-Id: I9e5470ec271e8af1ad4ddbb5f01f43a8a4879557
GitHub-Last-Rev: b95d617978
GitHub-Pull-Request: golang/go#68713
Reviewed-on: https://go-review.googlesource.com/c/go/+/602697
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Change-Id: Ic5454758c87e9f84a829aed8a72b5ad977878585
GitHub-Last-Rev: 2eb8ced712
GitHub-Pull-Request: golang/go#68605
Reviewed-on: https://go-review.googlesource.com/c/go/+/601295
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
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The speed of handing off a mutex to a waiting thread is sensitive to the
configuration of the spinning section of lock2. Measure that latency
directly, to complement our existing benchmarks of mutex throughput.
For #68578
Change-Id: I7637684bcff62eb05cc008491f095f653d13af4b
Reviewed-on: https://go-review.googlesource.com/c/go/+/602176
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Rhys Hiltner <rhys.hiltner@gmail.com>
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The flakes were introduced by me in CL 586655. It's unclear why only
FreeBSD seems affected, maybe other TCP stacks handle sending on a
half-closed connection differently, or aren't as quick to propagate the
RST over localhost.
Fixes#68155
Change-Id: I32a1b474a7d6531dbab93910c23568b867629e8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/602615
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
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Fixes#68690
Change-Id: Iebc27d5f385d787e568550a863f59f16c7a79fd7
Reviewed-on: https://go-review.googlesource.com/c/go/+/602178
Auto-Submit: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Rob Pike <r@golang.org>
Temporary measure to reduce the required MVP code.
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest-swissmap
Change-Id: I44dc8acd0dc8280c6beb40451998e84bc85c238a
Reviewed-on: https://go-review.googlesource.com/c/go/+/580915
Reviewed-by: Keith Randall <khr@golang.org>
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The two map implementations are still identical, but now the compiler
targets the appropriate ABI depending on GOEXPERIMENT.
For #54766.
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Change-Id: I8438f64f044ba9de30ddbf2b8ceb9b4edd2d5614
Reviewed-on: https://go-review.googlesource.com/c/go/+/580779
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
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The _swiss.go files are identical to the originals (except build tag).
Later CLs will change them.
For #54766.
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Change-Id: I9943e2d6f1cfa227ffbf27c9ddc9ce853695d225
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This CL creates tests for the cipher.Stream interface in the new
cryptotest package. This set of tests is called from the tests of
implementations of the Stream interface e.g. ctr_test.go, ofb_test.go,
rc4_test.go, etc.
Updates #25309
Change-Id: I57204ef9f4c0ec09b94e88466deb03c6715e411d
Reviewed-on: https://go-review.googlesource.com/c/go/+/595564
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Reviewed-by: Russell Webb <russell.webb@protonmail.com>
Change-Id: Id0fb180a2d7910cdff7f4ab7154d9ceeb2f1cb71
GitHub-Last-Rev: 03658dd974
GitHub-Pull-Request: golang/go#68709
Reviewed-on: https://go-review.googlesource.com/c/go/+/602675
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Go asm syntax example:
MOVV R4, FCSR0
MOVV FCSR1, R5
MOVV F4, FCC0
MOVV FCC1, F5
Equivalent platform assembler syntax:
movgr2fcsr fcsr0, r4
movfcsr2gr r5, fcsr1
movfr2cf fcc0, f4
movcf2fr f5, fcc1
Ref: https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html
This change also merges the case of floating point move instructions
and add checks for the range of special registers.
Change-Id: Ib08fbce83e7a31dc0ab4857bf9ba959855241d1c
Reviewed-on: https://go-review.googlesource.com/c/go/+/580279
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Like slices.Repeat, use math/bits.Mul to detect overflow in order to
avoid a divide which is slow.
While here, also use builtin min/max to simplify code.
Change-Id: I4a6d8cd5df97fa75f4e324d4be1405ce53c03d31
GitHub-Last-Rev: 54ba5c7126
GitHub-Pull-Request: golang/go#68704
Reviewed-on: https://go-review.googlesource.com/c/go/+/602475
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During the GC mark phase, one of the first behaviors of findRunnable is
to check if it should execute a GC mark worker. Mark workers often run
for many milliseconds in a row, so programs that invoke the scheduler
more frequently will see that condition trigger only a tiny fraction of
the time.
Obtaining a mark worker from the gcBgMarkWorkerPool involves a CAS on a
single memory location that's shared across the process. When GOMAXPROCS
is large, the resulting contention can waste a significant amount of CPU
time. But a sufficiently large GOMAXPROCS also means there's no need for
fractional mark workers, making it easier to check ahead of time if we
need to run a worker.
Check, without committing to a particular worker, whether we would even
want to run one.
For #68399
Change-Id: I5d8578c2101ee20a8a4156a029584356095ea118
Reviewed-on: https://go-review.googlesource.com/c/go/+/602477
Reviewed-by: Michael Pratt <mpratt@google.com>
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notes are used in sensitive locations in the runtime, such as those with
write barriers forbidden. Maps aren't designed for this sort of internal
use.
Notably, newm -> notewakeup doesn't allow write barriers, but mapaccess1
-> panic contains write barriers. The js runtime only builds right now
because the map access is optimized to mapaccess1_fast64, which happens
to not have a panic call.
The initial swisstable map implementation doesn't have a fast64 variant.
While we could add one, it is a bad idea in general to use a map in such
a fragile location. Simplify the implementation by storing the metadata
directly in the note, and using a linked list for checkTimeouts.
For #54766.
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Change-Id: Ib9d39f064ae4ad32dcc873f799428717eb6c2d5a
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If the length does not fit in int, saferio.ReadDataAt returns
io.ErrUnexpectedEOF. Treat is as an invalid format.
Fixes#68692.
For #68592.
Cq-Include-Trybots: luci.golang.try:gotip-linux-386-longtest
Change-Id: Ie856f29c907fd10e6d9b7dfbb6f0d8008a75a1c6
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For #62384
Change-Id: I6fc7a7b8b85e02c880f1d16e0467f5076d477f0f
GitHub-Last-Rev: 90ba7bae6a
GitHub-Pull-Request: golang/go#68651
Reviewed-on: https://go-review.googlesource.com/c/go/+/601776
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So the racy usage could be detected after re-writing "==" to
runtime.memequal call.
Updates #61204
Change-Id: Idb4ac37e55813cc87f9d16aa656fb447edf69ea1
Reviewed-on: https://go-review.googlesource.com/c/go/+/601117
Reviewed-by: Egon Elbre <egonelbre@gmail.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Change-Id: Ic0ea0f0de3f94e2d89bf76176c51f42e87b1bad7
GitHub-Last-Rev: 29517a07f9
GitHub-Pull-Request: golang/go#68695
Reviewed-on: https://go-review.googlesource.com/c/go/+/602177
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These are delay primitives for lock2. If a mutex isn't immediately
available, we can use procyield to tell the processor to wait for a
moment, or osyield to allow the OS to run a different process or thread
if one is waiting. We expect a processor-level yield to be faster than
an os-level yield, and for both of them to be fast relative to entering
a full sleep (via futexsleep or semasleep).
Each architecture has its own way of hinting to the processor that it's
in a spin-wait loop, so procyield presents an architecture-independent
interface for use in lock_futex.go and lock_sema.go.
Measure the (single-threaded) speed of these to confirm.
For #68578
Change-Id: I90cd46ea553f2990395aceb048206285558c877e
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There is no need to check whether the symbol is empty, since we have already
checked it before. In addition, it is enough to use C_ADDR to represent memory
access, C_LEXT and C_SEXT are not needed.
Change-Id: I7158d6b549482b35cd9ac5fba781648fb3f21922
Reviewed-on: https://go-review.googlesource.com/c/go/+/565615
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Reviewed-by: Qiqi Huang <huangqiqi@loongson.cn>
If p.To.Sym is nil, that means we can get the target offset from
p.To.Target().pc - c.pc，only when p.To.Sym is not nil, we need relocation
to get the true address of target symbol.
Change-Id: Ied52f675c6aa6e8fb8d972b7699f5cadd1ecb268
Reviewed-on: https://go-review.googlesource.com/c/go/+/565627
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Reviewed-by: Meidan Li <limeidan@loongson.cn>
When the kind of the operand is TYPE_BRANCH, we cannot determine
whether it is a long branch or a short branch, so we merge these
two classes into one.
Change-Id: I7d7fa8f62ff02791ec3de4e3e3f7610bc9cb1743
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The instructions belonging to case 32 have the same structure as the
instructions in case 2.
The instructions in case 33 are actually two-register operation
instructions. We move their definitions from function oprrr to oprr and
merge their implementation into case 9.
Change-Id: Id04aaa497e78d8198a58f8d406876d16b3f393a7
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Change-Id: I530df137bcb5094a828f97ecbe204265b50c8546
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This CL creates tests for the cipher.BlockMode interface in the new
cryptotest package. This set of tests is called from the tests of
implementations of the BlockMode interface e.g. cbc_test.go
Updates #25309
Change-Id: I3685bbee24d08d66f5bb4b7f001cbf520c844881
Reviewed-on: https://go-review.googlesource.com/c/go/+/595120
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Russell Webb <russell.webb@protonmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
