This is subtle and the compiler and runtime be in sync.
It is easier to develop the rest of the changes (especially when using
toolstash save/restore) if this change is separated out and done first.
Preparation for proposal #61405. The actual logic in the
compiler will be guarded by a GOEXPERIMENT, but it is
easier not to have GOEXPERIMENT-specific data structures
in the runtime, so just make the field always.
Change-Id: I7ec7049b99ae98bf0db365d42966baeec56e3774
Reviewed-on: https://go-review.googlesource.com/c/go/+/510539
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Most of the code is not necessary anymore.
Before we start changing how range works,
delete this code so it won't need updating.
Preparation for proposal #61405.
Change-Id: Ia6c6cc62b156e38a871279350a2e60c189967cac
Reviewed-on: https://go-review.googlesource.com/c/go/+/510536
Run-TryBot: Russ Cox <rsc@golang.org>
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This makes the intrinsic available on 64-bit platforms,
since the runtime cannot import math/bits.
Change-Id: I5296cc6a97d1cb4756ab369d96dc9605df9f8247
Reviewed-on: https://go-review.googlesource.com/c/go/+/516861
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Russ Cox <rsc@golang.org>
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Compact the Regexp.String output. It was only ever intended for debugging,
but there are at least some uses in the wild where regexps are built up
using regexp/syntax and then formatted using the String method.
Compact the output to help that use case. Specifically:
- Compact 2-element character class ranges: [a-b] -> [ab].
- Aggregate flags: (?i:A)(?i:B)*(?i:C)|(?i:D)?(?i:E) -> (?i:AB*C|D?E).
Fixes#57950.
Change-Id: I1161d0e3aa6c3ae5a302677032bb7cd55caae5fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/507015
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This makes cmd/api no longer an importable package.
In CL 453258 I forgot that there was no direct prohibition
on importing packages from cmd - we just rely on the
fact that cmd/* is all package main and everything else
is cmd/internal.
Fixes#62069.
Change-Id: Ifed738d333b40663f85eca8f83025fcea5df89a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/520038
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
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Delete CheckNested, which was for GOPATH get.
Unexport CheckGOVCS, which was only exported for GOPATH get.
Change-Id: I6d3f772bfea70f4a3ec197d48b74c3d6d58bcdce
Reviewed-on: https://go-review.googlesource.com/c/go/+/520037
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
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For aggregate-typed arguments passed to a call, expandCalls
decomposed them into parts in the same block where the value
was created. This is not necessarily the call block, and in
the case where stores are involved, can change the memory
leaving that block, and getting that right is problematic.
Instead, do all the expanding in the same block as the call,
which avoids the problems of (1) not being able to reorder
loads/stores across a block boundary to conform to memory
order and (2) (incorrectly, not) exposing the new memory to
consumers in other blocks. Putting it all in the same block
as the call allows reordering, and the call creates its own
new memory (which is already dealt with correctly).
Fixes#61992.
Change-Id: Icc7918f0d2dd3c480cc7f496cdcd78edeca7f297
Reviewed-on: https://go-review.googlesource.com/c/go/+/519276
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: David Chase <drchase@google.com>
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Some file systems do not support file IDs. We should not use
FILE_ID_BOTH_DIR_INFO when reading directories on these file systems,
as it will fail. Instead, we should use FILE_ID_FULL_DIR_INFO,
which doesn't require file ID support.
Fixes#61907Fixes#61918
Change-Id: I83d0a898f8eb254dffe5b8fc68a4ca4ef21c0d85
Reviewed-on: https://go-review.googlesource.com/c/go/+/518195
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This kind of worked, kind of didn't, but by now no one is running into
those configs anymore during "go mod init", the code is complex,
and the tests are slow. Not worth the trouble of maintaining anymore.
Change-Id: I02d4188d531c68334d17b2462bafec4c5dd49777
Reviewed-on: https://go-review.googlesource.com/c/go/+/518776
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We've decided to keep basic GOPATH mode running
for trees that already exist, but GOPATH-mode get is
being removed. It is old and not useful and probably
full of security holes. See #60915 for more details.
Fixes#60915.
Change-Id: I9db4c445579bf0b79f6543624602652555b66c1d
Reviewed-on: https://go-review.googlesource.com/c/go/+/518775
Auto-Submit: Russ Cox <rsc@golang.org>
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Change-Id: Iaa1751c6ac0df9d5b2cb74efb16996f4eaea0503
Reviewed-on: https://go-review.googlesource.com/c/go/+/519236
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Fixes#43183.
Change-Id: I50d99ef8ed513bba47166a25ea5c7c80cd8bd799
GitHub-Last-Rev: 684d70e9a3
GitHub-Pull-Request: golang/go#61979
Reviewed-on: https://go-review.googlesource.com/c/go/+/518860
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
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For #60370.
Change-Id: Idae906ec7027be6d95f78bf43f7ce8f9d07e6c00
GitHub-Last-Rev: c645f0cf82
GitHub-Pull-Request: golang/go#62033
Reviewed-on: https://go-review.googlesource.com/c/go/+/519555
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With no error handler installed, an error leads to an (internal panic
and) immediate abort of type checking. Not all invariants hold up in
this case, but it also doesn't matter.
In Checker.infer, verify result conditions always if an error handler
is installed, but only then.
Fixes#61938.
Change-Id: I4d3d61bbccc696a75639fee5010f5d3cef17e855
Reviewed-on: https://go-review.googlesource.com/c/go/+/519775
Reviewed-by: Robert Findley <rfindley@google.com>
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The existing code was simply wrong: we cannot ever use the result
signature parameter list (rsig.params) if sigParams was adjusted
for variadic functions. If it was adjusted, we always must either
use sigParams or its separately instantiated version.
In the condition "n > 0 && adjusted", the "n > 0" should have
been in either of the respective "if statement" branches.
Simplified the code by merging with the result signature parameter
update.
Fixes#61931.
Change-Id: I5d39bc8bbc4dd85c7c985055d29532b4b176955e
Reviewed-on: https://go-review.googlesource.com/c/go/+/519456
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This CL extends ir.StaticValue to also work on closure variables.
Also, it extracts the code from escape analysis that's responsible for
determining the static callee of a function. This will be useful when
go/defer statement normalization is moved to typecheck.
Change-Id: I69e1f7fb185658dc9fbfdc69d0f511c84df1d3ac
Reviewed-on: https://go-review.googlesource.com/c/go/+/518959
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Irrespective of whether unification is exact or inexact, method
signatures of interfaces must always match exactly: a type never
satisfies/implements an interface if relevant method signatures
are different (i.e., not identical, possibly after substitution).
Fixes#61879.
Change-Id: I20c0aa28ac86e2edec615b40f2269938e4a96938
Reviewed-on: https://go-review.googlesource.com/c/go/+/519435
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The link was missing the /pkg/ prefix.
Fixes#62034.
Change-Id: I96c43f06621e30241e140948129e90f0bd5f8d13
GitHub-Last-Rev: c1e7413f76
GitHub-Pull-Request: golang/go#62040
Reviewed-on: https://go-review.googlesource.com/c/go/+/519575
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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CL 511837 added a check for go test -skip Example but it currently
doesn't verify that the example doesn't show up in the command output.
Add such a check.
For #61482
Change-Id: I3a8f82fc137739bf291f39bf7719ff92cfc74f9d
Reviewed-on: https://go-review.googlesource.com/c/go/+/519595
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Pull in the latest published version of github.com/google/pprof
as part of the continuous process of keeping Go's dependencies
up to date. Done with:
go get github.com/google/pprof
go mod tidy
go mod vendor
For #36905.
Change-Id: I2a48e912712bc916c9d749acb1550682f919477e
Reviewed-on: https://go-review.googlesource.com/c/go/+/519657
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When reading an archive, check for the presence of sentinel entries
created by the Go command. These zero-sized marker entries don't contain
any useful symbols, but rather are there to communicate info to the
linker; ignore them during symbol dumping.
Fixes#62036.
Change-Id: Ied017b0c5b92a3cf6fd13bb9c9f3a9664e4f20f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/519635
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Change-Id: I3302cc2f0e03014e9497976e36d1c7a381a2f962
Reviewed-on: https://go-review.googlesource.com/c/go/+/518623
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When recovering from a panic, restore the caller's frame pointer before
returning control to the caller. Otherwise, if the function proceeds to
run more deferred calls before returning, the deferred functions will
get invalid frame pointers pointing to an address lower in the stack.
This can cause frame pointer unwinding to crash, such as if an execution
trace event is recorded during the deferred call on architectures which
support frame pointer unwinding.
Fixes#61766
Change-Id: I45f41aedcc397133560164ab520ca638bbd93c4e
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When a goroutine stack is reused on arm64, the spot on the stack where
the "caller's" frame pointer goes for the topmost frame should be
explicitly zeroed. Otherwise, the frame pointer check in adjustframe
with debugCheckBP enabled will fail on the topmost frame of a call stack
the first time a reused stack is grown.
Updates #39524, #58432
Change-Id: Ic1210dc005e3ecdbf9cd5d7b98846566e56df8f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/481636
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All openbsd architectures now use the same code, deduplicate accordingly.
Change-Id: I65f1d9bd78c97dbdf552ec95ebba7ec4d04c8d2d
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All netbsd architectures now use the same code, deduplicate accordingly.
Change-Id: Ieb179fd76885b7af6d388d7f2aee0f9fac6f1264
Reviewed-on: https://go-review.googlesource.com/c/go/+/518621
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Much of the gcc_linux_*.c code is identical and duplicated across
architectures. Consolidate code for 386, arm, loong64, mips* and
riscv64, where the only difference is the build tags (386 also
has some non-functional ordering differences).
Change-Id: I14ee9a4cc6b72e165239d196b68b6343efaddf0a
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Most freebsd architectures now use the same code, deduplicate accordingly.
The arm code differs slightly in that it has a compile time check for
ARM_TP_ADDRESS, however this is written in a way that it can be included
for all architectures.
Change-Id: I7f6032b63521d24d0c3b5e0e08d57e32b4f9ddc4
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This reduces inconsistency with other architectures and will allow
for further code deduplication.
Change-Id: Icf0d02f765546c3193cccaa22c79e632e12d6bba
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Use fatalf consistently on freebsd. Also use it on dragonfly, netbsd
and openbsd.
Change-Id: I8643c0b7bc13c3cb5173209d311d6d297913955b
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For 32 bit equality (Eq32), rather than always zero extending to 64 bits,
sign extend for signed types and zero extend for unsigned types. This makes
no difference to the equality test (via SUB), however it increases the
likelihood of avoiding unnecessary sign or zero extension simply for the
purpose of equality testing.
While here, replace the Neq* rules with (Not (Eq*)) - this makes no
difference to the generated code (as the intermediates get expanded and
eliminated), however it means that changes to the equality rules also
reflect in the inequality rules.
As an example, the following:
lw t0,956(t0)
slli t0,t0,0x20
srli t0,t0,0x20
li t1,1
bne t1,t0,278fc
Becomes:
lw t0,1024(t0)
li t1,1
bne t1,t0,278b0
Removes almost 1000 instructions from the Go binary on riscv64.
Change-Id: Iac60635f494f6db87faa47752bd1cc16e6b5967f
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This fixes a regression from CL 494181.
The traceEnabled function splits the stack and is being
called by reentersyscall that shouldn't call anything
that splits the stack. Same with traceShuttingDown.
Fixes#61975
Change-Id: I5eca0ba74cfa6acb0259e8400b03c2093cd59dd1
GitHub-Last-Rev: 9e55ae9d7c
GitHub-Pull-Request: golang/go#61981
Reviewed-on: https://go-review.googlesource.com/c/go/+/519055
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hex is in fact immutable, declare it as a const to avoid accidental
modification, also for consistency with other packages.
Change-Id: I99f292e98c82d4c4526e46c9897d154d0c073da5
GitHub-Last-Rev: d2f06965e7
GitHub-Pull-Request: golang/go#62011
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Change-Id: I26be9a9faa27c6c03cf8b9dec5908d8617d61312
Reviewed-on: https://go-review.googlesource.com/c/go/+/518276
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This is encoded similarly to RLDICL, but can clear the least
significant bits.
Likewise, update the auxint encoding of RLDICL to match those
used by the rotate and mask word ssa opcodes for easier usage
within lowering rules. The RLDICL ssa opcode is not used yet.
Change-Id: I42486dd95714a3e8e2f19ab237a6cf3af520c905
Reviewed-on: https://go-review.googlesource.com/c/go/+/515575
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The documentation of io.EOF: Read must return EOF itself, not an error
wrapping EOF, because callers will test for EOF using ==.
encoding/json package provides an example "ExampleDecoder" which uses
"err == io.EOF" as well, so I think it's more idiomatic to use == to test for io.EOF.
Change-Id: I8a9f06d655ca63b3ec3e7dbbdfc519a2686980e1
GitHub-Last-Rev: 665929e2a2
GitHub-Pull-Request: golang/go#62012
Reviewed-on: https://go-review.googlesource.com/c/go/+/519156
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This never belonged in escape analysis, but the non-unified generics
frontend didn't use typecheck. That frontend is gone, so now we can
desugar it earlier.
Change-Id: I70f34a851f27fce1133777c5eeca0f549fc60ede
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Keeps the top-level loop in Main slightly cleaner.
Change-Id: I9c8d38d4bbb34d53edc0796893534763e9eef2f1
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Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Remove these in favor of the explicit *At variants that take a
src.XPos.
Change-Id: I2c095b75e43b58fe31e3e1b15c811a66ac5a0f83
Reviewed-on: https://go-review.googlesource.com/c/go/+/518956
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Instead of having the inliner specially recognize that eq/hash
functions can't be inlined, change the geneq and genhash to mark them
as //go:noinline.
This is a prereq for a subsequent CL that will move more logic for
handling rtypes from package types to package reflectdata.
Change-Id: I091a9ededcc083fe8305cf5443a9af7d3a9053b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/518955
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Skip the gotoolchain_net script test if any new-ish GOEXPERIMENT is
set, since it will fail under these circumstances.
Updates #62106.
Change-Id: Idfef8af7246a3fbe6481347872a94fe64bbaed7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/519195
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
On Darwin (and assume also on iOS but not sure), notetsleepg
cannot be called in a signal-handling context. Avoid this
by disabling block reads on Darwin.
An alternate approach was to add "sigNote" with a pipe-based
implementation on Darwin, but that ultimately would have required
at least one more linkname between runtime and syscall to avoid
racing with fork and opening the pipe, so, not.
Fixes#61768.
Change-Id: I0e8dd4abf9a606a3ff73fc37c3bd75f55924e07e
Reviewed-on: https://go-review.googlesource.com/c/go/+/518836
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Relocate the definitions in cmddefs.go (used by the compiler and
the cover tool) to a separate package "covcmd". No change
in functionality, this is a pure refactoring, in preparation
for a subsequent change that will require updating the
imports for the package.
Change-Id: Ic1d277c94d9a574de0a11ec5ed77e892302b9a47
Reviewed-on: https://go-review.googlesource.com/c/go/+/517696
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
Most architectures have a crosscall1 function that takes a function
pointer, a setg_gcc function pointer and a g pointer. However,
crosscall_386 only takes a function pointer and the call to setg_gcc
is performed in the thread entry function.
Rename crosscall_386 to crosscall1 for consistency with other
architectures, as well as standardising the API - while not strictly
necessary, it will allow for further deduplication as the calling
code becomes more consistent.
Change-Id: I77cf42e1e15e0a4c5802359849a849c32cebd92f
Reviewed-on: https://go-review.googlesource.com/c/go/+/518618
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
Reviewed-by: Ian Lance Taylor <iant@google.com>
