Proposal #40281 was initially accepted, but has now been declined.
This CL removes most of the work done to implement it.
Specifically this reverts CLs 248341, 274448, 274474, and 278392.
For #40281
For #43226
Change-Id: I5a9ebb4d9cb5fb0962434b64c59beb8343030be5
Reviewed-on: https://go-review.googlesource.com/c/go/+/281515
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Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
The documentation was copied from filepath.WalkFunc, and the copy was
not fully adjusted to the new circumstances.
Fixes#43536
Change-Id: I09687c7656e6938ebd9fc1e1643d34be88cf141d
Reviewed-on: https://go-review.googlesource.com/c/go/+/282172
Trust: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Marco Gazerro <gazerro@open2b.com>
golang.org/cl/251878 disallowed non-ASCII characters in import paths,
in module mode. They were already disallowed in module paths, so this
change just extended the restriction to the package subdirectory of
the module. Update the release notes to alert users of this change.
Fixes#43052
Change-Id: I1caf9ef978dd3ac599a3f82c5c376ad62e6fc436
Reviewed-on: https://go-review.googlesource.com/c/go/+/282194
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For the example in #43551, before late call expansion, the OpArg type is
decomposed to int64. But the late call expansion is currently decompose
it to "x.Key" instead.
This CL make expand_calls decompose further for struct { 1-field type }
and array [1]elem.
This matches the previous rules for early decompose args:
(StructSelect (StructMake1 x)) => x
(ArraySelect (ArrayMake1 x)) => x
Fixes#43551
Change-Id: I2f1ebe18cb81cb967f494331c3d237535d2859e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/282332
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Reviewed-by: David Chase <drchase@google.com>
This change the struct fields for EmbedPatterns and EmbedFiles
to the Package struct listed in the go list documentation that
specifies the fields available to the go list template.
Fixes#43081
Change-Id: I89c325a9d6292a6ce484ee588b172d2f84e2333a
Reviewed-on: https://go-review.googlesource.com/c/go/+/282195
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The text/template functions are stored in a data structure shared by
all related templates, so do the same with the original, unwrapped,
functions on the html/template side.
For #39807Fixes#43295
Change-Id: I9f64a0a601f1151c863a2833b5be2baf649b6cef
Reviewed-on: https://go-review.googlesource.com/c/go/+/279492
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This is a pure code move to simplify the diff.
Change-Id: I56ce4d17ed9f003d79f748e267c46a17feefe301
Reviewed-on: https://go-review.googlesource.com/c/go/+/282192
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In general, we don't want to encourage reading them from CSRs, and
applications that really want to can parse the Extensions field.
Note that this also fixes a bug where the error of
parseKeyUsageExtension was not handled in parseCertificateRequest.
Fixes#43477
Updates #37172
Change-Id: Ia5707b0e23cecc0aed57e419a1ca25e26eea6bbe
Reviewed-on: https://go-review.googlesource.com/c/go/+/281235
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We are trying to avoid by not automatically updating go.mod. The
suggestion should be that users actually add the dependencies they
need, and the command in an easily copy-pastable form now.
Fixes: #43430
Change-Id: I2227dab498fcd8d66184c94ebe9e776629ccadfd
Reviewed-on: https://go-review.googlesource.com/c/go/+/280713
Run-TryBot: Baokun Lee <bk@golangcn.org>
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Trust: Bryan C. Mills <bcmills@google.com>
The panic message erroneously refers to float64 values.
Change-Id: I83380f41d6c28a72bc69a94b9bcdf9d42b1503c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/281236
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This is a port of CL 281546 to go/types.
Change-Id: I6f3d6fa520672d91072f3b5d1a06201320422b57
Reviewed-on: https://go-review.googlesource.com/c/go/+/281992
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Changes from dev.go2go (compare with patchset 1):
+ Update stale comments.
+ Fix a bug in structType where check.atEnd closed over the loop
variable, resulting in incorrect error positions.
+ Fix a bug in the CallExpr clause of typInternal where it didn't check
e.Brackets before checking instantiatedType.
+ Remove support for parenthesized embedded type names.
+ Add an IndexExpr clause to embeddedFieldIdent.
+ Lift the substMap construction out of the loop in funcType when
substituting receiver type parameters.
+ Minor simplification in collectTypeConstraints.
Compare with patchset 1 to see these changes.
Change-Id: I24f10e8615a0bbcd56c86ecf3490ce6a99cfebd6
Reviewed-on: https://go-review.googlesource.com/c/go/+/278916
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Earlier (contract-based) versions of the generics design restricted the
kind of types that could be used in a type list - the current design does
not have these restrictions anymore. Remove the respective checking code.
Change-Id: Ia333f7aa8a9c31a92c08acbd5cadba3532a455b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/281546
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This code matches go/types/typexpr but for the necessary adjustments
because of the use of package syntax rather than go/ast, and for the
code being part of cmd/compile/internal/types2 rather than go/types.
Primary differences to go.types/typexpr.go:
- syntax.FuncType doesn't carry type parameters
- type instantiations are represented using syntax.IndexExpr
nodes
- there's an explicit syntax.SliceType
- *x is expressed as a unary operation, not a StarExpr
- grouped fields are identified by identical pointer types
To see the changes copied from recent go/types changes, compare Patchsets 1 and 2.
Change-Id: I8aa9452882d1f5e9529c52a30c7c8e65f3fcbb43
Reviewed-on: https://go-review.googlesource.com/c/go/+/281545
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Fix a deadlock in DumpRequestOut which can occur if the request is
cancelled between response being sent and it being processed.
Also:
* Ensure we don't get a reader leak when an error is reported by the
transport before the body is consumed.
* Add leaked goroutine retries to avoid false test failures.
Fixes#38352
Change-Id: I83710791b2985b997f61fe5b49eadee0bb51bdee
Reviewed-on: https://go-review.googlesource.com/c/go/+/232798
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modload.Init now sets the default value for -mod if it wasn't set
explicitly. This happens before go.mod is loaded, so
modload.LoadModFile sets the default value again in order to enable
automatic vendoring.
Previously, cfg.BuildMod wasn't set at all if LoadModFile wasn't
called, as is the case for commands that run outside of a module
root. This problem only affected 'go install pkg@version' since other
commands are either forbidden in module mode or run with -mod=mod
(like 'go get' and 'go mod' subcommands).
This change also suppresses "missing sum" errors when -mod=readonly is
enabled and there is no module root.
Fixes#43278
Related #40278
Change-Id: I6071cc42bc5e24d0d7e84556e5bfd8e368e0019d
Reviewed-on: https://go-review.googlesource.com/c/go/+/279490
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For #41191
Change-Id: I75d327759c3d9ef061c19a80b9b2619038dedf68
Reviewed-on: https://go-review.googlesource.com/c/go/+/281492
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Now that CaptureVars is gone, we can remove the extra code in escape
analysis that only served to appease toolstash -cmp.
Change-Id: I8c811834f3d966e76702e2d362e3de414c94bea6
Reviewed-on: https://go-review.googlesource.com/c/go/+/281544
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Capture analysis is now part of escape analysis.
Passes toolstash -cmp.
Change-Id: Ifcd3ecc342074c590e0db1ff0646dfa1ea2ff57b
Reviewed-on: https://go-review.googlesource.com/c/go/+/281543
Trust: Matthew Dempsky <mdempsky@google.com>
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Currently we rely on the type-checker to do some basic data-flow
analysis to help decide whether function literals should capture
variables by value or reference. However, this analysis isn't done by
go/types, and escape analysis already has a better framework for doing
this more precisely.
This CL extends escape analysis to recalculate the same "byval" as
CaptureVars and check that it matches. A future CL will remove
CaptureVars in favor of escape analysis's calculation.
Notably, escape analysis happens after deadcode removes obviously
unreachable code, so it sees the AST without any unreachable
assignments. (Also without unreachable addrtakens, but
ComputeAddrtaken already happens after deadcode too.) There are two
test cases where a variable is only reassigned on certain CPUs. This
CL changes them to reassign the variables unconditionally (as no-op
reassignments that avoid triggering cmd/vet's self-assignment check),
at least until we remove CaptureVars.
Passes toolstash -cmp.
Change-Id: I7162619739fedaf861b478fb8d506f96a6ac21f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/281535
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The gc implementation has had precise GC for a while now, so we can
enable these tests more broadly.
Confirmed that they still fail with gccgo 10.2.1.
Change-Id: Ic1c0394ab832024a99e34163c422941a3706e1a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/281542
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In a gccgo installation the standard library sources are not available.
Change-Id: I929f3645e3ac95a1fa7047d6a3d243159a86ba66
Reviewed-on: https://go-review.googlesource.com/c/go/+/281493
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The backend doesn't synchronize compilation of functions with their
enclosed function literals, so it's not safe to double-check that
IsClosureVar isn't set on the underlying Name. Plenty of frontend
stuff would blow-up if this was wrong anyway, so it should be fine to
omit.
Change-Id: I3e97b64051fe56d97bf316c9b5dcce61f2082428
Reviewed-on: https://go-review.googlesource.com/c/go/+/281812
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tracebackothers is called from fatal throw/panic.
A fatal throw may be taken with allglock held (notably in the allocator
when allglock is held), which would cause a deadlock in tracebackothers
when we try to take allglock again. Locking allglock here is also often
a lock order violation w.r.t. the locks held when throw was called.
Avoid the deadlock and ordering issues by skipping locking altogether.
It is OK to miss concurrently created Gs (which are generally avoided by
freezetheworld(), and which were possible previously anyways if created
after the loop).
Fatal throw/panic freezetheworld(), which should freeze other threads
that may be racing to modify allgs. However, freezetheworld() does _not_
guarantee that it stops all other threads, so we can't simply drop the
lock.
Fixes#42669
Updates #43175
Change-Id: I657aec46ed35fd5d1b3f1ba25b500128ab26b088
Reviewed-on: https://go-review.googlesource.com/c/go/+/270861
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Trust: Michael Pratt <mpratt@google.com>
There's a bunch of code that wants to map closure variables back to
their original name, so add a single Name.Canonical method that they
can all use.
Also, move the Byval flag from being stored on individual closure
variables to being stored on the canonical variable.
Passes toolstash -cmp.
Change-Id: Ia3ef81af5a15783d09f04b4e274ce33df94518e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/281541
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ir.StaticValue currently relies on CaptureVars setting Addrtaken for
variables that are assigned within nested function literals. We want
to move that logic to escape analysis, but ir.StaticValue is used in
inlining and devirtualization, which happen before escape
analysis.
The long-term solution here is to generalize escape analysis's precise
reassignment tracking for use by other optimization passes, but for
now we just generalize ir.StaticValue to not depend on Addrtaken
anymore. Instead, it now also pays attention to OADDR nodes as well as
recurses into OCLOSURE bodies.
Passes toolstash -cmp.
Change-Id: I6114e3277fb70b235f4423d2983d0433c881f79f
Reviewed-on: https://go-review.googlesource.com/c/go/+/281540
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For OINDEX expressions, ir.OuterValue depends on knowing the indexee's
type. Rather than silently acting as though it's not an array, make it
loudly fail.
The only code that needs to be fixed to support this is checkassign
during typechecking, which needs to avoid calling ir.OuterValue now if
typechecking the assigned operand already failed.
Passes toolstash -cmp.
Change-Id: I935cae0dacc837202bc6b63164dc2f0a6fde005c
Reviewed-on: https://go-review.googlesource.com/c/go/+/281539
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CaptureVars is responsible for deciding whether free variables should
be captured by value or by reference, but currently it also makes up
for some of the short-comings of the frontend symbol resolution /
type-checking algorithms. These are really separate responsibilities,
so move the latter into type-checking where it fits better.
Passes toolstash -cmp.
Change-Id: Iffbd53e83846a9ca9dfb54b597450b8543252850
Reviewed-on: https://go-review.googlesource.com/c/go/+/281534
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Dump uses reflection to print IR nodes, and it only knew how to print
out the Nodes slice type itself. This CL adds support for printing any
slice whose element type implements Node, such as SwitchStmt and
SelectStmt's clause lists.
Change-Id: I2fd8defe11868b564d1d389ea3cd9b8abcefac62
Reviewed-on: https://go-review.googlesource.com/c/go/+/281537
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These aren't part of the Node interface anymore, so no need to keep
them around.
Passes toolstash -cmp.
[git-generate]
cd src/cmd/compile/internal/ir
: Fix one off case that causes trouble for rf.
sed -i -e 's/n.SetClass(ir.PAUTO)/n.Class_ = ir.PAUTO/' ../ssa/export_test.go
pkgs=$(go list . ../...)
rf '
ex '"$(echo $pkgs)"' {
var n *Name
var c Class
n.Class() -> n.Class_
n.SetClass(c) -> n.Class_ = c
}
rm Name.Class
rm Name.SetClass
mv Name.Class_ Name.Class
'
Change-Id: Ifb304bf4691a8c455456aabd8aa77178d4a49500
Reviewed-on: https://go-review.googlesource.com/c/go/+/281294
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When exporting signature types, we include the originating package,
because it's exposed via go/types's API. And as a consistency check,
we ensure that the parameter names came from that same package.
However, we were getting this wrong in the case of exported variables
that were initialized with a method value using an imported method. In
this case, when we created the method value wrapper function's
type (which is reused as the variable's type if none is explicitly
provided in the variable declaration), we were reusing the
original (i.e., imported) parameter names, but the newly created
signature type was associated with the current package instead.
The correct fix here is really to preserve the original signature
type's package (along with position and name for its parameters), but
that's awkward to do at the moment because the DeclFunc API requires
an ir representation of the function signature, whereas we only
provide a way to explicitly set packages via the type constructor
APIs.
As an interim fix, we associate the parameters with the current
package, to be consistent with the signature type's package.
Fixes#43479.
Change-Id: Id45a10f8cf64165c9bc7d9598f0a0ee199a5e752
Reviewed-on: https://go-review.googlesource.com/c/go/+/281292
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It's an error to call Int64Val on constants that don't fit into
int64. CL 272654 made the compiler stricter about detecting misuse,
and revealed that we were using it improperly in detecting consecutive
integer-switch cases. That particular usage actually did work in
practice, but it's easy and best to just fix it.
Fixes#43480.
Change-Id: I56f722d75e83091638ac43b80e45df0b0ad7d48d
Reviewed-on: https://go-review.googlesource.com/c/go/+/281272
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So we can remove Name.CloneName now.
Passes toolstash -cmp.
Change-Id: I63e57ba52a7031e06fe9c4ee9aee7de6dec70792
Reviewed-on: https://go-review.googlesource.com/c/go/+/281312
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In inl.go, that code path is unused, since we added ir.BasicLit to
represent unnamed OLITERALs.
In race.go, rather than cloning ir.RegFP, we can just create it from
scratch again.
Passes toolstash -cmp (incl. w/ -race).
Change-Id: I8e063e4898d2acf056ceca5bc03df6b40a14eca9
Reviewed-on: https://go-review.googlesource.com/c/go/+/281192
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After the previous cleanup/optimization CLs, ascompatee now correctly
handles map assignments too. So remove the code from order.mapAssign,
which causes us to assign to the map at the wrong point during
execution. It's not every day you get to fix an issue by only removing
code.
Thanks to Cuong Manh Le for test cases and continually following up on
this issue.
Passes toolstash -cmp. (Apparently the standard library never uses
tricky map assignments. Go figure.)
Fixes#23017.
Change-Id: Ie0728103d59d884d00c1c050251290a2a46150f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/281172
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After the previous two optimization CLs, this code path now generates
the same code as ascompatee does anyway. So just use that and remove
some redundant code.
Passes toolstash -cmp.
Change-Id: I5e2e5c6dbea64d8e91abe0f2cf51aa5bb86576d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/281154
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Instead of evaluating all result expressions up front and then
assigning them to their result destinations, we can interleave
evaluation with assignment. This reduces how much temporary
stack/register space is needed to hold the values in flight.
Doesn't pass toolstash -cmp, because it allows better return statement
code to be generated. E.g., cmd/go's text segment on linux/ppc64le
shrinks another 1kB.
Change-Id: I3fe889342c80e947e0118704ec01f1682c577e6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/281153
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
order.go has already ordered function calls, so ascompatee only needs
to worry about expressions that might access a variable after it's
already been re-assigned. It already handles this, so the safeExpr
calls simply result in unnecessarily pessimistic code.
Does not pass toolstash -cmp, because it allows more efficient code
generation. E.g., cmd/go on linux/ppc64le is about 2kB smaller.
Change-Id: Idde0588eabe7850fa13c4e281fc46bbeffb4f68c
Reviewed-on: https://go-review.googlesource.com/c/go/+/281152
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Just de-duplicating some logic and adding better comments.
Passes toolstash -cmp.
Change-Id: I15ec07070510692c6d4367880bc3d2d9847370ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/281132
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
After the previous commit, we no longer access Walkdef on anything but
ir.Names, so we can remove them from the Node interface and miniNode.
The flag bits storage should also move from miniNode.bits to
Name.flags, but the latter is already full at the moment. Leaving as a
TODO for now.
Passes toolstash -cmp.
Change-Id: I2427e4cf7bc68dc1d1529f40fb93dd9f7a9149f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/281005
Trust: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
We only actually care about ir.Names in typecheckdef, so don't bother
calling it on anything else. Allows us to get rid of some more
superfluous .Name() calls and .(*ir.Name) assertions.
Passes toolstash -cmp.
Change-Id: I78c7cb680178991ea185958b47a36f101d4d5ef7
Reviewed-on: https://go-review.googlesource.com/c/go/+/281004
Trust: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
To do closure conversion during escape analysis, we need to walk the
AST in order. So this CL makes a few changes:
1. Function literals are walked where they appear in their enclosing
function, rather than as independent functions.
2. Walking "range" and "switch" statements is reordered to visit the
X/Tag expression up front, before the body.
3. Most assignments are refactored to use a new assignList helper,
which handles 1:1, 2:1, and N:N assignments. N:1 function call
assignments are still handled directly by the OAS2FUNC case.
4. A latent missed-optimization in escape.addr is fixed: the
ONAMEOFFSET case was failing to update k with the result of calling
e.addr(n.Name_). In partice, this probably wasn't an issue because
ONAMEOFFSET is likely only used for PEXTERN variables (which are
treated as heap memory anyway) or code generated by walk (which has
already gone through escape analysis).
5. Finally, don't replace k with discardHole at the end of
escape.addr. This is already handled at the start of escape.expr, and
we'll want to be able to access the hole's location after escape.expr
returns.
Passes toolstash -cmp.
Change-Id: I2325234346b12b10056a360c489692bab8fdbd93
Reviewed-on: https://go-review.googlesource.com/c/go/+/281003
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Just "=". It's cleaner.
Passes toolstash -cmp.
[git-generate]
cd src/cmd/compile/internal/ir
pkgs=$(go list . ../...)
rf '
ex '"$(echo $pkgs)"' {
var l Nodes
var p *Nodes
p.Set(l) -> *p = l
}
ex '"$(echo $pkgs)"' {
var n InitNode
var l Nodes
*n.PtrInit() = l -> n.SetInit(l)
}
rm Nodes.Set
'
Change-Id: Ic97219792243667146a02776553942ae1189ff7d
Reviewed-on: https://go-review.googlesource.com/c/go/+/281002
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
