+ 2021-01-25 063c72f06d [dev.regabi] cmd/compile: backport changes from dev.typeparams (9456804)
+ 2021-01-23 d05d6fab32 [dev.regabi] cmd/compile: replace ir.Name map with ir.NameSet for SSA 2
+ 2021-01-23 48badc5fa8 [dev.regabi] cmd/compile: fix escape analysis problem with closures
+ 2021-01-23 51e1819a8d [dev.regabi] cmd/compile: scan body of closure in tooHairy to check for disallowed nodes
Matthew Dempsky [Sun, 24 Jan 2021 18:52:00 +0000 (10:52 -0800)]
[dev.regabi] cmd/compile: backport changes from dev.typeparams (9456804)
This CL backports a bunch of changes that landed on dev.typeparams,
but are not dependent on types2 or generics. By backporting, we reduce
the divergence between development branches, hopefully improving test
coverage and reducing risk of merge conflicts.
Updates #43866.
Change-Id: I382510855c9b5fac52b17066e44a00bd07fe86f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/286172
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Robert Griesemer <gri@golang.org>
Baokun Lee [Sat, 23 Jan 2021 09:05:01 +0000 (17:05 +0800)]
[dev.regabi] cmd/compile: replace ir.Name map with ir.NameSet for SSA 2
Same as CL 284897, the last one.
Passes toolstash -cmp.
Updates #43819
Change-Id: I0bd8958b3717fb58a5a6576f1819a85f33b76e2d
Reviewed-on: https://go-review.googlesource.com/c/go/+/285913
Run-TryBot: Baokun Lee <bk@golangcn.org>
TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Trust: Baokun Lee <bk@golangcn.org>
Robert Griesemer [Sat, 23 Jan 2021 01:49:57 +0000 (17:49 -0800)]
[dev.typeparams] test: set -G=3 and enable more errorcheck tests in run.go
Change-Id: I9591f7aeab0448aca661560bf3064e057b48293e
Reviewed-on: https://go-review.googlesource.com/c/go/+/286012
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Robert Griesemer <gri@golang.org>
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Dan Scales [Sat, 23 Jan 2021 00:07:00 +0000 (16:07 -0800)]
[dev.regabi] cmd/compile: fix escape analysis problem with closures
In reflect.methodWrapper, we call escape analysis without including the
full batch of dependent functions, including the closure functions.
Because of this, we haven't created locations for the params/local
variables of a closure when we are processing a function that
inlines that closure. (Whereas in the normal compilation of the
function, we do call with the full batch.) To deal with this, I am
creating locations for the params/local variables of a closure when
needed.
Without this fix, the new test closure6.go would fail.
Updates #43818
Change-Id: I5f91cfb6f35efe2937ef88cbcc468e403e0da9ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/285677
Run-TryBot: Dan Scales <danscales@google.com>
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Robert Griesemer [Sat, 23 Jan 2021 00:49:21 +0000 (16:49 -0800)]
[dev.typeparams] cmd/compile/internal/types2: use same sort criteria for methods as compiler
Note: This invalidates the implementation of MethodSet further (it
also has not been updated to accomodate for type parameters). But
types2 doesn't make use of it. We should remove it.
Change-Id: Ia2601bdd59b3f3ee0b72bc2512153c42bf5053b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/285994
Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Matthew Dempsky [Fri, 22 Jan 2021 21:29:59 +0000 (13:29 -0800)]
[dev.typeparams] cmd/compile: refactor SelectorExpr code into helpers
This CL refactors the SelectorExpr-handling code added in CL 285373
into helper functions that can eventually be reused by iimport.
Change-Id: I15b4a96c242f63cb370d7492ed08168550724f47
Reviewed-on: https://go-review.googlesource.com/c/go/+/285953
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Matthew Dempsky [Fri, 22 Jan 2021 23:35:11 +0000 (15:35 -0800)]
[dev.typeparams] all: merge dev.regabi (7e0a81d) into dev.typeparams
As with CL 285875, this required resolving some conflicts around
handling of //go:embed directives. Still further work is needed to
reject uses of //go:embed in files that don't import "embed", so this
is left as a TODO. (When this code was written for dev.typeparams, we
were still leaning towards not requiring the "embed" import.)
Also, the recent support for inlining closures (CL 283112) interacts
poorly with -G=3 mode. There are some known issues with this code
already (#43818), so for now this CL disables inlining of closures
when in -G=3 mode with a TODO to revisit this once closure inlining is
working fully.
Dan Scales [Fri, 22 Jan 2021 22:32:06 +0000 (14:32 -0800)]
[dev.regabi] cmd/compile: scan body of closure in tooHairy to check for disallowed nodes
Several of the bugs in #43818 are because we were not scanning the body
of an possibly inlined closure in tooHairy(). I think this scanning got
lost in the rebase past some of the ir changes. This fixes the issue
related to the SELRECV2 and the bug reported from cuonglm. There is at
least one other bug related to escape analysis which I'll fix in another
change.
Change-Id: I8f38cd12a287881155403bbabbc540ed5fc2248e
Reviewed-on: https://go-review.googlesource.com/c/go/+/285676
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
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Matthew Dempsky [Fri, 22 Jan 2021 20:00:45 +0000 (12:00 -0800)]
[dev.regabi] all: merge master (dab3e5a) into dev.regabi
This merge had two conflicts to resolve:
1. The embed code on master had somewhat substantially diverged, so
this CL tediously backported the changes to dev.regabi. In particular,
I went through all of the embed changes to gc/{embed,noder,syntax}.go
and made sure the analogous code on dev.regabi in noder/noder.go and
staticdata/embed.go mirrors it.
2. The init-cycle reporting code on master was extended slightly to
track already visited declarations to avoid exponential behavior. The
same fix is applied on dev.regabi, just using ir.NameSet instead of
map[ir.Node]bool.
Matthew Dempsky [Fri, 22 Jan 2021 09:46:42 +0000 (01:46 -0800)]
[dev.typeparams] cmd/compile: refactor irgen's handling of ":="
The previous code was stylized after noder, which was written when it
was more idiomatic to simple create a gc.Node and then populate and
shuffle around its fields as appropriate.
Now with package ir, it's somewhat nicer to compute all the fields up
front and pass them to the constructor functions, rather than passing
nil and populating the fields afterwards.
Net addition of lines of code, but I think the new code is overall
still somewhat simpler, and will be easier to refactor out into code
for helpers.go.
Change-Id: I8c6f6b65e0a8317129655a0fc493d8af75527b97
Reviewed-on: https://go-review.googlesource.com/c/go/+/285732
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Michael Matloob [Sat, 16 Jan 2021 00:41:26 +0000 (19:41 -0500)]
cmd/go: add documentation for test and xtest fields output by go list
The TestEmbedPatterns, TestEmbedFiles, XTestEmbedPatterns, and
XTestEmbedFiles fields were left out of golang.org/cl/282195 which was
supposed to document the embed fields available in the go list
output. Add documentation for them in this CL.
Fixes #43081
Change-Id: Ifc256c476daec7c0f0e2c41f86b82f958b3e2b1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/284258
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org> Reviewed-by: Jay Conrod <jayconrod@google.com> Reviewed-by: Bryan C. Mills <bcmills@google.com>
Rob Findley [Tue, 19 Jan 2021 22:30:09 +0000 (17:30 -0500)]
[dev.typeparams] go/types: import api_test.go changes from dev.go2go
This CL imports tests for the go/types API from the dev.go2go branch.
Only parse type parameters for packages with a magic prefix, with the
rationale that while generics are in preview, we want existing
(non-generic) tests to exercise the default mode.
Change-Id: I8ae0d8769b997a8a93b708453a1afaecb262244d
Reviewed-on: https://go-review.googlesource.com/c/go/+/284693
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Joel Sing [Fri, 22 Jan 2021 08:32:43 +0000 (19:32 +1100)]
runtime: remove pthread_kill/pthread_self for openbsd
We're now using getthrid() and thrkill() instead.
Updates #36435
Change-Id: I1c6bcfb9b46d149e0a2a10e936a244576489a88e
Reviewed-on: https://go-review.googlesource.com/c/go/+/285692
Trust: Joel Sing <joel@sing.id.au>
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Dan Scales [Tue, 19 Jan 2021 21:54:33 +0000 (13:54 -0800)]
[dev.typeparams] cmd/compile: disambiguate OXDOT in noder using types2 Selection info
By using the types2 Selection information, we can create ODOT, ODOTPTR,
OCALLPART, ODOTMETH, ODOTINTER, and OMETHEXPR nodes directly in noder,
so we don't have to do that functionality in typecheck.go. Intermediate
nodes are created as needed for embedded fields. Don't have to typecheck
the results of g.selectorExpr(), because we set the types of all the
needed nodes.
There is one bug remaining in 'go test reflect' that will be fixed when dev.regabi is merged.
Change-Id: I4599d43197783e318610deb2f208137f9344ab63
Reviewed-on: https://go-review.googlesource.com/c/go/+/285373
Run-TryBot: Dan Scales <danscales@google.com>
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Damien Neil [Fri, 22 Jan 2021 02:24:55 +0000 (18:24 -0800)]
net/http: fix flaky TestDisableKeepAliveUpgrade
This test hijacks a connection. It was reading from the net.Conn
returned by Hijack, not the bufio.ReadWriter, causing flaky failures
when a read-ahead byte was held in the read buffer.
Fixes #43073.
Change-Id: Ic3e7f704fba9635fd851cb3c0c0c74e312b75f6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/285596
Trust: Damien Neil <dneil@google.com>
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Robert Griesemer [Fri, 22 Jan 2021 04:20:22 +0000 (20:20 -0800)]
[dev.typeparams] cmd/compile/internal/types2: adjust errors in branch checking code, fix a bug
The types2.Config.IgnoreBranches flag mistakenly excluded a
set of label-unrelated branch checks. After fixing this and
also adjusting some error messages to match the existing
compiler errors, more errorcheck tests pass now with the -G
option.
Renamed IngnoreBranches to IgnoreLabels since its controlling
label checks, not all branch statement (such as continue, etc)
checks.
Change-Id: I0819f56eb132ce76c9a9628d8942af756691065a
Reviewed-on: https://go-review.googlesource.com/c/go/+/285652
Trust: Robert Griesemer <gri@golang.org>
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Ian Lance Taylor [Thu, 21 Jan 2021 02:01:56 +0000 (18:01 -0800)]
doc/go1.16: add notes about package-specific fs.FS changes
For #40700
For #41190
Change-Id: I964d6856d5cad62c859d0f3a7afdd349a8ad87cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/285093
Trust: Ian Lance Taylor <iant@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Ian Lance Taylor [Thu, 21 Jan 2021 04:09:18 +0000 (20:09 -0800)]
doc/go1.16: mention new debug/elf constants
For #40700
Change-Id: If105d2f043539bb0893f577a984f14ee3e7ca753
Reviewed-on: https://go-review.googlesource.com/c/go/+/285212
Trust: Ian Lance Taylor <iant@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Roland Shoemaker [Fri, 15 Jan 2021 20:14:06 +0000 (12:14 -0800)]
all: introduce and use internal/execabs
Introduces a wrapper around os/exec, internal/execabs, for use in
all commands. This wrapper prevents exec.LookPath and exec.Command from
running executables in the current directory.
All imports of os/exec in non-test files in cmd/ are replaced with
imports of internal/execabs.
Russ Cox [Mon, 11 Jan 2021 14:43:08 +0000 (09:43 -0500)]
cmd/go: add test case for cgo CC setting
Change-Id: Ied986053a64447c5eac6369f6c9b69ed3d3f94d9
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/949415 Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/284782
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Russ Cox [Mon, 11 Jan 2021 15:01:24 +0000 (10:01 -0500)]
cmd/cgo: report exec errors a bit more clearly
Change-Id: I0e6bebf0e2e6efdef4be880e0c6c7451b938924b
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/949417 Reviewed-by: Katie Hockman <katiehockman@google.com> Reviewed-by: Jay Conrod <jayconrod@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/284781
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Russ Cox [Mon, 11 Jan 2021 14:41:54 +0000 (09:41 -0500)]
cmd/go: pass resolved CC, GCCGO to cgo
This makes sure the go command and cgo agree about
exactly which compiler is being used.
This issue was reported by RyotaK.
Fixes CVE-2021-3115
Fixes #43783
Change-Id: If171c5c8b2523efb5ea2d957e5ad1380a038149c
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/949416 Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/284780
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Filippo Valsorda [Fri, 8 Jan 2021 02:56:58 +0000 (03:56 +0100)]
crypto/elliptic: fix P-224 field reduction
This patch fixes two independent bugs in p224Contract, the function that
performs the final complete reduction in the P-224 field. Incorrect
outputs due to these bugs were observable from a high-level
P224().ScalarMult() call.
The first bug was in the calculation of out3GT. That mask was supposed
to be all ones if the third limb of the value is greater than the third
limb of P (out[3] > 0xffff000). Instead, it was also set if they are
equal. That meant that if the third limb was equal, the value was always
considered greater than or equal to P, even when the three bottom limbs
were all zero. There is exactly one affected value, P - 1, which would
trigger the subtraction by P even if it's lower than P already.
The second bug was more easily hit, and is the one that caused the known
high-level incorrect output: after the conditional subtraction by P, a
potential underflow of the lowest limb was not handled. Any values that
trigger the subtraction by P (values between P and 2^224-1, and P - 1
due to the bug above) but have a zero lowest limb would produce invalid
outputs. Those conditions apply to the intermediate representation
before the subtraction, so they are hard to trace to precise inputs.
This patch also adds a test suite for the P-224 field arithmetic,
including a custom fuzzer that automatically explores potential edge
cases by combining limb values that have various meanings in the code.
contractMatchesBigInt in TestP224Contract finds the second bug in less
than a second without being tailored to it, and could eventually find
the first one too by combining 0, (1 << 28) - 1, and the difference of
(1 << 28) and (1 << 12).
The incorrect P224().ScalarMult() output was found by the
elliptic-curve-differential-fuzzer project running on OSS-Fuzz and
reported by Philippe Antoine (Catena cyber).
Fixes CVE-2021-3114
Fixes #43786
Change-Id: I50176602d544de3da854270d66a293bcaca57ad7
Reviewed-on: https://go-review.googlesource.com/c/go/+/284779
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Baokun Lee [Thu, 21 Jan 2021 07:24:38 +0000 (15:24 +0800)]
[dev.regabi] cmd/compile: replace ir.Name map with ir.NameSet for dwarf
Same as CL 284897, but for dwarf.
Passes toolstash -cmp.
Fixes #43819
Change-Id: Icbe43aa2e3cb96e6a6c318523c643247da8e4c74
Reviewed-on: https://go-review.googlesource.com/c/go/+/284899
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Baokun Lee [Thu, 21 Jan 2021 06:13:36 +0000 (14:13 +0800)]
[dev.regabi] cmd/compile: replace ir.Name map with ir.NameSet in inlining
As CL 282212 mentioned, we should clean all map[*ir.Name]bool with
ir.NameSet.
Passes toolstash -cmp.
Updates #43819
Change-Id: I1ce5d2055f88539f807dc021cd8e3941b425bc4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/284897
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Robert Griesemer [Thu, 21 Jan 2021 01:03:36 +0000 (17:03 -0800)]
[dev.typeparams] cmd/compile: use nil instead of syntax.ImplicitOne
Represent x++/-- as x +=/-= with the RHS of the assignment being nil
rather than syntax.ImplicitOne.
Dependent code already had to check for syntax.ImplicitOne, but
then shared some existing code for regular assignment operations.
Now always handle this case fully explicit, which simplifies the
code.
Change-Id: I28c7918153c27cbbf97b041d0c85ff027c58687c
Reviewed-on: https://go-review.googlesource.com/c/go/+/285172
Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Cuong Manh Le [Wed, 20 Jan 2021 07:46:38 +0000 (14:46 +0700)]
[dev.regabi] cmd/compile: remove CallExpr.Rargs
Instead, push the temps assignments to init. This does not pass
toolstash, since when before this, the temps were evaluated after
function callee, now we evaluate them before.
Change-Id: Icb9cb10e036925b56c1ef3eec468416a11f4932f
Reviewed-on: https://go-review.googlesource.com/c/go/+/284894
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Matthew Dempsky [Wed, 20 Jan 2021 20:54:23 +0000 (12:54 -0800)]
[dev.typeparams] cmd/compile: directly set some simple expression types
This CL updates irgen to directly set the type for a bunch of basic
expressions that are easy to handle already. Trickier rewrites are
still handled with typecheck.Expr, but responsibility of calling that
is pushed down to the conversion of individual operations.
Change-Id: I774ac6ab4c72ad854860ab5c741867dd42a066b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/285058
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Matthew Dempsky [Thu, 21 Jan 2021 01:03:36 +0000 (17:03 -0800)]
[dev.typeparams] cmd/compile/internal/types2: convert untyped arguments to delete
For the predeclared "delete" function, types2 was checking that the
second argument was assignable to the map's key type, but not actually
updating the Types map as appropriate. So this could leave untyped
constants in the AST.
The error "cannot convert" is somewhat less precise than the previous
"not assignable" error, but it's consistent with how types2 reports
other erroneous assignments of untyped constants.
Change-Id: Ic3ca3a3611ad0e4646c050e93088cdf992234e5f
Reviewed-on: https://go-review.googlesource.com/c/go/+/285059
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Robert Griesemer [Wed, 20 Jan 2021 23:55:39 +0000 (15:55 -0800)]
[dev.typeparams] cmd/compile/internal/types2: make predeclared "any" alias for interface{}
If we ever decide to permit the use of the predeclared identifier
"any" in lieu of interface{}, it must be an alias for interface{}.
Change-Id: Ic751d7f9b61133fb57625f56ce95d99f034b32c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/285132
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Matthew Dempsky [Wed, 20 Jan 2021 22:08:53 +0000 (14:08 -0800)]
[dev.typeparams] cmd/dist: add -G=3 test coverage
Change-Id: Icb85b93f0d98df722fffd70cf9a2554ac2098c60
Reviewed-on: https://go-review.googlesource.com/c/go/+/285052
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Dan Scales [Tue, 1 Dec 2020 22:48:03 +0000 (14:48 -0800)]
[dev.regabi] cmd/compile: exporting, importing, and inlining functions with OCLOSURE
I have exporting, importing, and inlining of functions with closures
working in all cases (issue #28727). all.bash runs successfully without
errors.
Approach:
- Write out the Func type, Dcls, ClosureVars, and Body when exporting
an OCLOSURE.
- When importing an OCLOSURE, read in the type, dcls, closure vars,
and body, and then do roughly equivalent code to (*noder).funcLit
- During inlining of a closure within inlined function, create new
nodes for all params and local variables (including closure
variables), so they can have a new Curfn and some other field
values. Must substitute not only on the Nbody of the closure, but
also the Type, Cvars, and Dcl fields.
Fixes #28727
Change-Id: I4da1e2567c3fa31a5121afbe82dc4e5ee32b3170
Reviewed-on: https://go-review.googlesource.com/c/go/+/283112
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Trust: Dan Scales <danscales@google.com>
Matthew Dempsky [Wed, 20 Jan 2021 21:54:53 +0000 (13:54 -0800)]
[dev.typeparams] cmd/compile: simplify how irgen handles qualified idents
This CL moves qualified identifier handling into expr0 with other
selector expressions, rather than as a completely separate special
case handled up front. This has a few benefits:
1. It's marginally simpler/cleaner.
2. It allows extra checking for imported objects that they have the
same type that types2 thought they had.
3. For imported, untyped constants, we now instead handle them with
the "tv.Value != nil" case. In particular, this ensures that they've
always already been coerced to the appropriate concrete type by
types2.
Change-Id: Ibf44ae6901db36aa5251f70934616e9fcbd1cbc5
Reviewed-on: https://go-review.googlesource.com/c/go/+/285053
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Dmitri Shuralyov [Sat, 5 Dec 2020 20:03:27 +0000 (15:03 -0500)]
cmd/internal/moddeps: check content of all modules in GOROOT
Expand the scope of the TestAllDependenciesVendored test to check
that all modules in GOROOT are tidy, that packages are vendored,
the vendor content matches the upstream copy exactly, and that
bundled packages are re-generated (using x/tools/cmd/bundle at
the version selected in cmd module; this is deterministic and
guaranteed to be updated over time).
This is done in a conceptually simple way:
1. Make a temporary copy of the entire GOROOT tree (except .git),
one that is safe to modify.
2. Run a list of high-level commands, the same commands we expect
Go developers should be able to run in a normal complete GOROOT
tree to make it clean and tidy.
3. Diff the end result with the original GOROOT tree being tested
to catch any unexpected differences.
The current set of commands that are run require the cmd/go command,
and a functional compiler itself (because re-generating the syscall
package involves a directive like //go:generate go run [...]). As a
result, copying a large majority of the GOROOT tree is a requirement.
Instead of looking for the few files or directories that can we can
get away not copying (e.g., the testdata directories aren't strictly
needed at this time), we opt not to optimize and just do the simple
copy. This is motivated by these reasons:
• We end up having a complete, normal GOROOT tree, one that happens
to be located at another path. There's a very high likelihood that
module management/code generation commands, both the ones we run
today and any additional ones that we might want to add in the
future, will result in correct results even as the Go project
evolves over time.
• Having a completely stand-alone copy of the GOROOT tree without
symlinks minimizes the risk of some of the module management/code
generation commands, either now or in the future, from modifying
the user's original GOROOT tree, something that should not happen
during test execution. Overlays achieved with symlinks work well
when we can guarantee only new files are added, but that isn't
the case here.
• Copying the entire GOROOT (without .git), takes around 5 seconds
on a fairly modern computer with an SSD. The most we can save is
a couple of seconds.
(We make some minor exceptions: the GOROOT/.git directory isn't copied,
and GOROOT/{bin,pkg} are deemed safe to share and thus symlink instead
of copying. If these optimizations cease to be viable to make, we'll
need to remove them.)
Since this functionality is fairly expensive to execute and requires
network access, it runs only when the test is executed without -short
flag. The previous behavior of the TestAllDependenciesVendored test is
kept in -short test mode. all.bash runs package tests with -short flag,
so its behavior is unchanged. The expectation is that the new test will
run on some of the longtest builders to catch problems. Users can invoke
the test manually 'go test cmd/internal/moddeps' (and it's run as part
of 'go test cmd', again, only when -short flag isn't provided).
On a 2017 MacBook Pro, a successful long test takes under 15 seconds,
which should be within scope of all long tests that are selected by
'go test std cmd'. We may further adjust when and where the test runs
by default based on our experience.
Ian Lance Taylor [Wed, 20 Jan 2021 05:30:36 +0000 (21:30 -0800)]
runtime: don't adjust timer pp field in timerWaiting status
Before this CL, the following sequence was possible:
* GC scavenger starts and sets up scavenge.timer
* GC calls readyForScavenger, but sysmon is sleeping
* program calls runtime.GOMAXPROCS to shrink number of processors
* procresize destroys a P, the one that scavenge.timer is on
* (*pp).destroy calls moveTimers, which gets to the scavenger timer
* scavenger timer is timerWaiting, and moveTimers clears t.pp
* sysmon wakes up and calls wakeScavenger
* wakeScavengers calls stopTimer on scavenger.timer, still timerWaiting
* stopTimer calls deltimer which loads t.pp, which is still nil
* stopTimer tries to increment deletedTimers on nil t.pp, and crashes
The point of vulnerability is the time that t.pp is set to nil by
moveTimers and the time that t.pp is set to non-nil by moveTimers,
which is a few instructions at most. So it's not likely and in
particular is quite unlikely on x86. But with a more relaxed memory
model the area of vulnerability can be somewhat larger. This appears
to tbe the cause of two builder failures in a few months on linux-mips.
This CL fixes the problem by making moveTimers change the status from
timerWaiting to timerMoving while t.pp is clear. That will cause
deltimer to wait until the status is back to timerWaiting, at which
point t.pp has been set again.
Fixes #43712
Change-Id: I66838319ecfbf15be66c1fac88d9bd40e2295852
Reviewed-on: https://go-review.googlesource.com/c/go/+/284775
Trust: Ian Lance Taylor <iant@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Michael Pratt <mpratt@google.com>
Michael Matloob [Thu, 14 Jan 2021 01:58:00 +0000 (20:58 -0500)]
cmd/go: have go mod vendor copy embedded files in subdirs
If a package vendored with go mod vendor depends on embedded
files contained in subdirectories, copy them into the the
corresponding place in the module's vendor tree. (Embeds in
parent directories are disallowed by the embed pattern rules, and
embeds in the same directory are copied because go mod vendor
already copies the non-go files in the package's own directory).
Export the vendor pattern expansion code in internal/load so
internal/modcmd's vendor code can use it.
Fixes #43077
Change-Id: I61edb344d73df590574a6498ffb6069e8d72a147
Reviewed-on: https://go-review.googlesource.com/c/go/+/283641
Trust: Michael Matloob <matloob@golang.org>
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Bryan C. Mills <bcmills@google.com> Reviewed-by: Jay Conrod <jayconrod@google.com>
Rob Findley [Tue, 12 Jan 2021 14:20:22 +0000 (09:20 -0500)]
[dev.typeparams] go/types: add tests from dev.go2go
Add tests from the dev.go2go branch, modified to eliminate support for
parenthesized type embedding and method type parameters. For the most
part these tests were made to pass via the fixes from preceding CLs in
this stack.
While integrating support for type parameters with the changes to
go/types in master, a decision was made to temporarily use an error code
of 0 for new error messages. Now that these messages are actually
emitted during checking of test packages, it is a test failure for them
to have an error code of 0. To satisfy the test, create a new temporary
error code '_Todo', which represents an error code that has not yet been
assigned. _Todo is added only where it was necessary to make tests pass:
many error codes were left as 0, meaning we don't have any tests that
produce them. This marker may help us produce more comprehensive tests
in the future.
Finally, each package checked by testDir was made into a subtest, for
the ease of running individual packages while debugging test failures.
This seemed worth keeping.
Change-Id: Iba421b797e9fb11af664a73902f67d6c4f30ecad
Reviewed-on: https://go-review.googlesource.com/c/go/+/283854
Run-TryBot: Robert Findley <rfindley@google.com>
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Trust: Robert Findley <rfindley@google.com>
Rob Findley [Fri, 15 Jan 2021 16:42:10 +0000 (11:42 -0500)]
[dev.typeparams] go/types: refactor untyped conversion for typeparams
Some logic was missing in the merge from dev.go2go to deal with untyped
conversion of generic types. Part of this was due to the complexity of
the merge, as untyped conversion had been refactored on master.
Rather than back out the refactoring of untyped conversion, in this CL I
have decided to take it one step further. It was always problematic that
isRepresentable and canConvertUntyped mutated their arguments. In
retrospect the refactoring was perhaps too conservative.
This CL performs the following refactoring:
+ Replace 'isRepresentable' with 'representation': a Checker method
produces the rounded representation of an untyped constant operand as
a target type.
+ Make some functions return error codes rather than errors, and factor
out the construction of the error message for invalid conversion.
This avoided some indirect code.
+ Replace implicitType with implicitTypeAndValue, and have it handle
the case of a constant basic operand, returning the rounded value.
+ Eliminate canConvertUntyped, lifting the logic to update expr types
and values to the two callers.
+ Add handling for Sum types in implicitTypeAndValue. Here, the
decision was made to depart from dev.go2go (and types2), and produce
a Sum type as output. This seemed most correct on first principles,
and tests still passed (though some logic for recording types had to
be updated to allow for Sum types).
Change-Id: Ic93901f69e6671b83b14ee2bf185a4ed767e31ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/284256
Run-TryBot: Robert Findley <rfindley@google.com>
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Trust: Robert Griesemer <gri@golang.org>
Trust: Robert Findley <rfindley@google.com>
Joel Sing [Fri, 15 Jan 2021 17:38:50 +0000 (04:38 +1100)]
runtime: convert openbsd/amd64 locking to libc
Switch openbsd/amd64 to locking via libc, rather than performing direct
system calls.
Update #36435
Change-Id: I5e92bd70ce557b78ff385577088a9775cc468ea9
Reviewed-on: https://go-review.googlesource.com/c/go/+/270378
Trust: Joel Sing <joel@sing.id.au>
Run-TryBot: Joel Sing <joel@sing.id.au>
TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
Robert Griesemer [Sat, 16 Jan 2021 02:19:00 +0000 (18:19 -0800)]
[dev.typeparams] cmd/compile/internal/types2: report type of nil based on context
With this CL, the type reported for uses of the predeclared
identifier nil changes from untyped nil to the type of the
context within which nil is used, matching the behaviour of
types2 for other untyped types.
If an untyped nil value is assigned or converted to an
interface, the nil expression is given the interface type.
The predicate TypeAndValue.IsNil doesn't change in behavior,
it still reports whether the relevant expression is a (typed
or untyped) nil value.
Change-Id: Id766468f3f3f2a53e4c55e1e6cd521e459c4a94f
Reviewed-on: https://go-review.googlesource.com/c/go/+/284218
Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Rob Findley [Fri, 15 Jan 2021 17:45:11 +0000 (12:45 -0500)]
[dev.typeparams] go/types: fix some merge errors in call.go
Some comments were left unresolved in the merge of call.go. Resolve them
to get tests to pass (tests to be added in a later CL).
Change-Id: Icf894593e7dd5131406c4eece8d43d4cd3170d1c
Reviewed-on: https://go-review.googlesource.com/c/go/+/284255
Run-TryBot: Robert Findley <rfindley@google.com>
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Trust: Robert Findley <rfindley@google.com>
Rob Findley [Fri, 15 Jan 2021 16:30:49 +0000 (11:30 -0500)]
[dev.typeparams] go/types: don't modify Named.underlying in validType
This was fixed on dev.go2go in CL 240901, but accidentally omitted from
the merge.
Change-Id: I9020eb51dac4aa07d57c3de747d33ba84abb6386
Reviewed-on: https://go-review.googlesource.com/c/go/+/284254
Run-TryBot: Robert Findley <rfindley@google.com>
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Rob Findley [Fri, 15 Jan 2021 16:23:28 +0000 (11:23 -0500)]
[dev.typeparams] go/types: strip annotations from errors
Strip annotations from errors before emitting them. This is a partial
merge from dev.go2go: the Error.Full field is omitted for now, and
stripAnnotations is integrated with the updated error handling from
master.
Change-Id: Ia24d66b691a10d90b258b0b688d50c6b176bd629
Reviewed-on: https://go-review.googlesource.com/c/go/+/284253
Run-TryBot: Robert Findley <rfindley@google.com>
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Trust: Robert Griesemer <gri@golang.org>
Trust: Robert Findley <rfindley@google.com>
Rob Findley [Fri, 15 Jan 2021 16:19:13 +0000 (11:19 -0500)]
[dev.typeparams] go/types: unify methods in missingMethod
Unify methods in Checker.missingMethod. This code was accidentally
dropped from the merge, while dropping support for method type
parameters, but is needed for checking implementations of generic
interfaces.
Put the logic back, including checks that are only needed for method
type parameters. It makes the code no simpler to assume that method type
parameters are disallowed, and we have checks elsewhere that produce
errors for methods with type parameters.
Change-Id: I91f0c9d3e04537fdb9f7ae23a4ce4cec9f1da10e
Reviewed-on: https://go-review.googlesource.com/c/go/+/284252
Run-TryBot: Robert Findley <rfindley@google.com>
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Trust: Robert Findley <rfindley@google.com>
Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
Rob Findley [Fri, 15 Jan 2021 16:08:02 +0000 (11:08 -0500)]
[dev.typeparams] go/parser: error for type instances without ParseTypeParams
It should be an invariant that the parser does not produce ast.CallExprs
with Brackets == true unless parsing with ParseTypeParams.
Fix the one case where this invariant was violated, and add a test for
errors produced in valid generic code when ParseTypeParams is unset. We
did have some coverage of errors in short_test.go, but I find them to be
easier to read in a testdata file and would like to gradually migrate
them there.
Change-Id: If2d174377087daa1b820cabc2b5bf8bcb0b39d8e
Reviewed-on: https://go-review.googlesource.com/c/go/+/284192
Run-TryBot: Robert Findley <rfindley@google.com>
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Trust: Robert Findley <rfindley@google.com>
Matthew Dempsky [Tue, 19 Jan 2021 18:38:33 +0000 (10:38 -0800)]
[dev.typeparams] cmd/compile: cache mapped types during irgen
If we see the exact same types2.Type a second time, we can map it to
the same *types.Type instance. Not strictly necessary, but reduces
memory usage and plays better with the rest of the compiler given the
current state of things.
Change-Id: I53686d072c7c7834b0c97417bc8d5f2cd24572b2
Reviewed-on: https://go-review.googlesource.com/c/go/+/284692
Trust: Matthew Dempsky <mdempsky@google.com>
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Robert Griesemer [Fri, 15 Jan 2021 22:37:35 +0000 (14:37 -0800)]
[dev.typeparams] cmd/compile/internal/types: minor fixes/cleanups around testing
Also, implemented isConstType predicate in terms of "is" predicate.
Change-Id: Ib3b311f52196dba974802348bc6d63307530d915
Reviewed-on: https://go-review.googlesource.com/c/go/+/284217
Trust: Robert Griesemer <gri@golang.org>
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Constantin Konstantinidis [Fri, 15 Jan 2021 16:05:29 +0000 (17:05 +0100)]
cmd/go: allow go fmt to complete when embedded file is missing
Fixes #43273
Change-Id: I75fe2e608cb43c048e3c2a22fe7fbb6eb779504a
Reviewed-on: https://go-review.googlesource.com/c/go/+/280452
Trust: Jay Conrod <jayconrod@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
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Russ Cox [Fri, 8 Jan 2021 22:02:41 +0000 (17:02 -0500)]
cmd/compile: require 'go 1.16' go.mod line for //go:embed
This will produce better errors when earlier versions of
Go compile code using //go:embed. (The import will cause
a compilation error but then the go command will add to
the output that the Go toolchain in use looks too old
and maybe that's the problem.)
This CL also adds a test for disallowing embed of a var inside a func.
It's a bit too difficult to rebase down into that CL.
The build system configuration check is delayed in order to
make it possible to use errorcheck for these tests.
Change-Id: I12ece4ff2d8d53380b63f54866e8f3497657d54c
Reviewed-on: https://go-review.googlesource.com/c/go/+/282718
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
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Cherry Zhang [Tue, 19 Jan 2021 16:02:10 +0000 (11:02 -0500)]
cmd/link: exit before Asmb2 if error
If there are already errors emitted, don't run the Asmb2 pass
and just exit. At the point of Asmb2 relocations are already
resolved and errors should have been reported, if any. Asmb2 is
unlikely to emit additional useful users errors. Instead, the
invalid input may cause inconsistencies and crash the linker, or
it may emit some internal errors which are more confusing than
helpful. Exit on error before Asmb2.
Fixes #43748.
Change-Id: Icf6e27f2eef5b6259e921ec0e64bebad5dd805f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/284576
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Than McIntosh <thanm@google.com>
Joel Sing [Sun, 23 Aug 2020 17:13:54 +0000 (03:13 +1000)]
cmd/link,runtime: switch openbsd/amd64 to pthreads
This switches openbsd/amd64 to thread creation via pthreads, rather than doing
direct system calls.
Update #36435
Change-Id: I1105d5c392aa3e4c445d99c8cb80b927712e3529
Reviewed-on: https://go-review.googlesource.com/c/go/+/250180
Trust: Joel Sing <joel@sing.id.au>
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Joel Sing [Sat, 3 Oct 2020 15:44:41 +0000 (01:44 +1000)]
runtime: factor out usesLibcall
Rather than inline lists of GOOS values, factor out the code that checks
if a runtime makes system calls via libcall.
Change-Id: Ib19d7e63a2b4b8314f1841c0ff26e1b3a16b4b22
Reviewed-on: https://go-review.googlesource.com/c/go/+/259239
Trust: Joel Sing <joel@sing.id.au> Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
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Joel Sing [Mon, 24 Aug 2020 08:04:13 +0000 (18:04 +1000)]
runtime: factor out mStackIsSystemAllocated
Rather than repeat long lists of GOOS values, factor out the code that checks
if a runtime starts on a system allocated stack. Note that this adds aix to
one case, which appears to have been previously missed.
Change-Id: I5cecb0bb47dd79cde8d723e5a42ba541e43cbfff
Reviewed-on: https://go-review.googlesource.com/c/go/+/250179
Trust: Joel Sing <joel@sing.id.au> Reviewed-by: Cherry Zhang <cherryyz@google.com>
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Matthew Dempsky [Sun, 17 Jan 2021 10:53:18 +0000 (02:53 -0800)]
[dev.regabi] cmd/compile: directly create go.map and go.track symbols
These symbols are implementation details and don't correspond to Go
source symbols, so directly create them as linker symbols and get rid
of their pseudo packages.
Passes toolstash -cmp w/ -gcflags=all=-abiwrap.
Change-Id: I2e97374c21f3e909f6d350f15e7a5ed3574cadf4
Reviewed-on: https://go-review.googlesource.com/c/go/+/284372
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Trust: Matthew Dempsky <mdempsky@google.com>
Currently there's a lot of logic within package types for creating
Linksyms. This CL pulls it out into base, where it can be more easily
reused by other compiler code that shouldn't need to depend on package
types.
Package base probably isn't the best place for this, but it's
convenient because it's a package that types already depends on. It's
also where the Ctxt object lives, which these functions depend upon.
Passes toolstash -cmp w/ -gcflags=all=-abiwrap.
Change-Id: I50d8b7e4596955205036969eab24d7dab053b363
Reviewed-on: https://go-review.googlesource.com/c/go/+/284231
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Matthew Dempsky [Sun, 17 Jan 2021 08:46:42 +0000 (00:46 -0800)]
[dev.regabi] cmd/compile: cleanup callTargetLSym
Now that TailCallStmt carries an *ir.Name instead of a *types.Sym,
callTargetLSym can be similarly updated to take the target function as
an *ir.Name.
This inches us closer towards being able to move Linksym and other
properties from *types.Sym to *ir.Name, where they belong.
Passes toolstash -cmp w/ -gcflags=all=-abiwrap.
Change-Id: I091da290751970eba8ed0438f66d6cca88b665a8
Reviewed-on: https://go-review.googlesource.com/c/go/+/284228
Trust: Matthew Dempsky <mdempsky@google.com>
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Jason A. Donenfeld [Fri, 15 Jan 2021 12:01:37 +0000 (13:01 +0100)]
runtime: free Windows event handles after last lock is dropped
Calls to lock may need to use global members of mOS that also need to be
cleaned up before the thread exits. Before this commit, these resources
would leak. Moving them to be cleaned up in unminit, however, would race
with gstack on unix. So this creates a new helper, mdestroy, to release
resources that must be destroyed only after locks are no longer
required. We also move highResTimer lifetime to the same semantics,
since it doesn't help to constantly acquire and release the timer object
during dropm.
Updates #43720.
Change-Id: Ib3f598f3fda1b2bbcb608099616fa4f85bc1c289
Reviewed-on: https://go-review.googlesource.com/c/go/+/284137
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Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Jason A. Donenfeld [Mon, 18 Jan 2021 12:31:28 +0000 (13:31 +0100)]
os: do not close syscall.Stdin in TestReadStdin
By calling NewConsoleFile on syscall.Stdin, we wind up closing it when
the function returns, which causes errors when all the tests are run in
a loop. To fix this, we instead create a duplicate handle of stdin.
Fixes #43720.
Change-Id: Ie6426e6306c7e1e39601794f4ff48bbf2fe67502
Reviewed-on: https://go-review.googlesource.com/c/go/+/284140
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
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Matthew Dempsky [Mon, 18 Jan 2021 06:05:50 +0000 (22:05 -0800)]
[dev.regabi] cmd/compile: move stack objects to liveness
Calculating and emitting stack objects are essentially part of
liveness analysis, so move the code from ssagen to liveness. Allows
unexporting liveness.ShouldTrack.
Passes toolstash -cmp.
Change-Id: I88b5b2e75b8dfb46b8b03a2fa09a9236865cbf3e
Reviewed-on: https://go-review.googlesource.com/c/go/+/284413
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Matthew Dempsky [Mon, 18 Jan 2021 00:14:48 +0000 (16:14 -0800)]
[dev.regabi] cmd/compile: convert OPANIC argument to interface{} during typecheck
Currently, typecheck leaves arguments to OPANIC as their original
type. This CL changes it to insert implicit OCONVIFACE operations to
convert arguments to `interface{}` like how any other function call
would be handled.
No immediate benefits, other than getting to remove a tiny bit of
special-case logic in order.go's handling of OPANICs. Instead, the
generic code path for handling OCONVIFACE is used, if necessary.
Longer term, this should be marginally helpful for #43753, as it
reduces the number of cases where we need values to be addressable for
runtime calls.
However, this does require adding some hacks to appease existing
tests:
1. We need yet another kludge in inline budgeting, to ensure that
reflect.flag.mustBe stays inlinable for cmd/compile/internal/test's
TestIntendedInlining.
2. Since the OCONVIFACE expressions are now being introduced during
typecheck, they're now visible to escape analysis. So expressions like
"panic(1)" are now seen as "panic(interface{}(1))", and escape
analysis warns that the "interface{}(1)" escapes to the heap. These
have always escaped to heap, just now we're accurately reporting about
it.
(Also, unfortunately fmt.go hides implicit conversions by default in
diagnostics messages, so instead of reporting "interface{}(1) escapes
to heap", it actually reports "1 escapes to heap", which is
confusing. However, this confusing messaging also isn't new.)
Change-Id: Icedf60e1d2e464e219441b8d1233a313770272af
Reviewed-on: https://go-review.googlesource.com/c/go/+/284412
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Cuong Manh Le [Sun, 17 Jan 2021 09:41:19 +0000 (16:41 +0700)]
[dev.regabi] cmd/compile: use *obj.LSym instead of *ir.Name for staticdata functions
Those functions only use (*ir.Name).Linksym(), so just change them to
get an *obj.LSym directly. This helps get rid of un-necessary
validations that their callers have already done.
Passes toolstash -cmp.
For #43737.
Change-Id: Ifd6c2525e472f8e790940bc167665f9d74dd1bc5
Reviewed-on: https://go-review.googlesource.com/c/go/+/284121
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Matthew Dempsky [Sun, 17 Jan 2021 10:16:58 +0000 (02:16 -0800)]
[dev.regabi] cmd/compile: remove unneeded packages from ir.Pkgs
ir.Pkgs.Itablink isn't used anymore. (I don't recall what it was ever
used for.)
ir.Pkgs.Race and ir.Pkgs.Msan are only needed in exactly only place,
so just create them on demand there, the same way that we create
"main" on demand.
Change-Id: I3474bb949f71cd40c7a462b9f4a369adeacde0d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/284230
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Matthew Dempsky [Sun, 17 Jan 2021 08:30:32 +0000 (00:30 -0800)]
[dev.regabi] cmd/compile: add ir.TailCallStmt
This CL splits out ORETJMP as a new TailCallStmt node, separate from
the other BranchStmt nodes. In doing so, this allows us to change it
from identifying a function by *types.Sym to identifying one by
directly pointing to the *ir.Func.
While here, also rename the operation to OTAILCALL.
Passes toolstash -cmp.
Change-Id: I273e6ea5d92bf3005ae02fb59b3240a190a6cf1b
Reviewed-on: https://go-review.googlesource.com/c/go/+/284227
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CL 284223 tightened down the allowed expressions in mayCall, but
evidently a little too tight. The linux-amd64-noopt builder does in
fact see expressions with non-empty Init lists in arguments list.
Since I believe these can only appear on the RHS of LogicalExpr
expressions, this CL relaxes that one case.
Change-Id: I1e6bbd0449778c40ed2610b3e1ef6a825a84ada7
Reviewed-on: https://go-review.googlesource.com/c/go/+/284226
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This CL simplifies the previous one a little bit further, by combining
reordering stack-temporary initialization and getting rid of an
unneeded temporary variable. (Does not pass toolstash -cmp.)
Change-Id: I17799dfe368484f33a8ddd0ab4f68647d6262147
Reviewed-on: https://go-review.googlesource.com/c/go/+/284225
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Matthew Dempsky [Sun, 17 Jan 2021 00:59:19 +0000 (16:59 -0800)]
[dev.regabi] cmd/compile: replace Node.HasCall with walk.mayCall
After CL 284220, we now only need to detect expressions that contain
function calls in the arguments list of further function calls. So we
can simplify Node.HasCall/fncall/etc a lot.
Instead of incrementally tracking whether an expression contains
function calls all throughout walk, simply check once at the point of
using an expression as a function call argument. Since any expression
checked here will itself become a function call argument, it won't be
checked again because we'll short circuit at the enclosing function
call.
Also, restructure the recursive walk code to use mayCall, and trim
down the list of acceptable expressions. It should be okay to be
stricter, since we'll now only see function call arguments and after
they've already been walked.
It's possible I was overly aggressive removing Ops here. But if so,
we'll get an ICE, and it'll be easy to re-add them. I think this is
better than the alternative of accidentally allowing expressions
through that risk silently clobbering the stack.
Passes toolstash -cmp.
Change-Id: I585ef35dcccd9f4018e4bf2c3f9ccb1514a826f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/284223
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Currently, to ensure OAS2FUNC results are assigned in the correct
order, they're always assigned to temporary variables. However, these
temporary variables are typed based on the destination type, which may
require an interface conversion. This means walk may have to then
introduce a second set of temporaries to ensure result parameters are
all copied out of the results area, before it emits calls to runtime
conversion functions.
That's just silly. Instead, this CL changes order to allocate the
result temporaries with the same type as the function returns in the
first place, and then assign them one at a time to their destinations,
with conversions as needed.
While here, also fix an order-of-evaluation issue with has-ok
assignments that I almost added to multi-value function call
assignments, and add tests for each.
Change-Id: I9f4e962425fe3c5e3305adbbfeae2c7f253ec365
Reviewed-on: https://go-review.googlesource.com/c/go/+/284220
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Dan Scales [Fri, 15 Jan 2021 22:12:35 +0000 (14:12 -0800)]
[dev.regabi] cmd/compile, runtime: fix up comments/error messages from recent renames
Went in a semi-automated way through the clearest renames of functions,
and updated comments and error messages where it made sense.
Change-Id: Ied8e152b562b705da7f52f715991a77dab60da35
Reviewed-on: https://go-review.googlesource.com/c/go/+/284216
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CL 283233 added reflectType method to ssagen.state, which we can use to
setup type address in the SSA backend in favor of the frontend. However,
this will change the order of symbols generation, so not safe for toolstash.
Change-Id: Ib6932ec42a9d28c3fd7a1c055596e75494c29843
Reviewed-on: https://go-review.googlesource.com/c/go/+/284115
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