1
0
mirror of https://github.com/golang/go synced 2024-11-17 17:34:46 -07:00
Commit Graph

46434 Commits

Author SHA1 Message Date
Cuong Manh Le
82b9cae700 [dev.regabi] cmd/compile: change ir.NameOffsetExpr to use *obj.LSym instead of *Name
Because NameOffsetExpr is always used with global variables, and SSA
backend only needs (*Name).Linksym() to generate value for them.

Passes toolstash -cmp.

Updates #43737

Change-Id: I17209e21383edb766070c0accd1fa4660659caef
Reviewed-on: https://go-review.googlesource.com/c/go/+/284119
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-17 06:37:42 +00:00
Cuong Manh Le
88956fc4b1 [dev.regabi] cmd/compile: stop analyze NameOffsetExpr.Name_ in escape analysis
It is always used with global variables, so we can skip analyze it, the
same as what we are doing for ONAME/PEXTERN nodes.

While at it, add a Fatalf check to ensure NewNameOffsetExpr is only
called for global variables.

For #43737

Change-Id: Iac444ed8d583baba5042bea096531301843b1e8f
Reviewed-on: https://go-review.googlesource.com/c/go/+/284118
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-17 06:37:18 +00:00
Matthew Dempsky
7ce2a8383d [dev.regabi] cmd/compile: simplify stack temp initialization
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
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>
2021-01-17 05:08:11 +00:00
Matthew Dempsky
ba0e8a92fa [dev.regabi] cmd/compile: refactor temp construction in walk
This CL adds a few new helper functions for constructing and
initializing temporary variables during walk.

Passes toolstash -cmp.

Change-Id: I54965d992cd8dfef7cb7dc92a17c88372e52a0d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/284224
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>
2021-01-17 05:08:05 +00:00
Matthew Dempsky
78e5aabcdb [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
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>
2021-01-17 05:07:59 +00:00
Matthew Dempsky
6de9423445 [dev.regabi] cmd/compile: cleanup OAS2FUNC ordering
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
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>
2021-01-16 23:19:26 +00:00
Dan Scales
a956a0e909 [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
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-16 02:31:08 +00:00
Cuong Manh Le
ab3b67abfd [dev.regabi] cmd/compile: remove ONEWOBJ
After CL 283233, SSA can now handle new(typ) without the frontend to
generate the type address, so we can remove ONEWOBJ in favor of ONEW
only.

This is also not save for toolstash, the same reason with CL 284115.

Change-Id: Ie03ea36b3b6f95fc7ce080376c6f7afc402d51a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/284117
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-16 01:36:46 +00:00
Cuong Manh Le
c9b1445ac8 [dev.regabi] cmd/compile: remove TypeAssertExpr {Src,Dst}Type fields
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
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-16 01:36:11 +00:00
Jason A. Donenfeld
682a1d2176 runtime: detect errors in DuplicateHandle
These functions rely on DuplicateHandle succeeding, but they don't check
the return value, which might be masking subtle bugs that cause other
problems down the line.

Updates #43720.

Change-Id: I77f0e6645affa534777ffc173144a52e4afa5f81
Reviewed-on: https://go-review.googlesource.com/c/go/+/284135
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Austin Clements <austin@google.com>
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
2021-01-15 23:38:58 +00:00
Dmitri Shuralyov
9f83418b83 cmd/link: remove GOROOT write in TestBuildForTvOS
Tests should avoid writing to GOROOT when possible. Such writes
would fail if GOROOT is non-writeable, and it can interfere with
other tests that don't expect GOROOT to change during test execution.

Updates #28387.

Change-Id: I7d72614f218df3375540f5c2f9c9f8c11034f602
Reviewed-on: https://go-review.googlesource.com/c/go/+/284293
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-15 21:46:25 +00:00
Russ Cox
ec9470162f cmd/compile: allow embed into any string or byte slice type
The current implementation requires saying "string" or "[]byte"
and disallows aliases, defined types, and even "[]uint8".
This was not 100% intended and mostly just fell out of when
the checks were being done in the implementation (too early,
before typechecking).

After discussion on #43217 (forked into #43602),
the consensus was to allow all string and byte slice types,
same as we do for string conversions in the language itself.
This CL does that.

It's more code than you'd expect because the decision has
to be delayed until after typechecking.

But it also more closely aligns with the version that's
already on dev.regabi.

Fixes #43602.

Change-Id: Iba919cfadfbd5d7116f2bf47e2512fb1d5c36731
Reviewed-on: https://go-review.googlesource.com/c/go/+/282715
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2021-01-15 20:37:59 +00:00
Russ Cox
54198b04db cmd/compile: disallow embed of var inside func
Allowing embedding into []byte inside a func creates an
unfortunate problem: either all calls start with the same
underlying data and can see each other's changes to the
underlying data (surprising and racy!) or all calls start
by making their own copy of the underlying data
(surprising and expensive!).

After discussion on #43216, the consensus was to remove
support for all vars embedded inside functions.

Fixes #43216.


Change-Id: I01e62b5f0dcd9e8566c6d2286218e97803f54704
Reviewed-on: https://go-review.googlesource.com/c/go/+/282714
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2021-01-15 20:37:17 +00:00
Russ Cox
b386c735e7 cmd/go: fix go generate docs
The docs were never updated for the change to the placement
of the DO NOT EDIT line.

Also, the description of the DO NOT EDIT line interrupted the
description of the //go:generate line, which made for some
confusing references in the text that followed. Move it lower.

Fixes #41196.

Change-Id: I6af2a199fa98d45f5ccac7cdf7e9e54257699e61
Reviewed-on: https://go-review.googlesource.com/c/go/+/283633
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-01-15 20:36:53 +00:00
Jason A. Donenfeld
bb5075a525 syscall: remove RtlGenRandom and move it into internal/syscall
There's on need to expose this to the frozen syscall package, and it
also doesn't need to be unsafe. So we move it into internal/syscall and
have the generator make a safer function signature.

Fixes #43704.

Change-Id: Iccae69dc273a0aa97ee6846eb537f1dc1412f2de
Reviewed-on: https://go-review.googlesource.com/c/go/+/283992
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
2021-01-15 18:42:27 +00:00
Bryan C. Mills
1deae0b597 os: invoke processKiller synchronously in testKillProcess
Previously, testKillProcess needlessly invoked processKiller in a
separate goroutine and failed to wait for that goroutine to complete,
causing the calls to t.Fatalf in that goroutine to potentially occur
after the test function had already returned.

Fixes #43722

Change-Id: I5d03cb24af51bb73f0ff96419dac57ec39776967
Reviewed-on: https://go-review.googlesource.com/c/go/+/284153
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-01-15 18:29:43 +00:00
Matthew Dempsky
03a875137f [dev.regabi] cmd/compile: unexport reflectdata.WriteType
WriteType isn't safe for direct concurrent use, and users should
instead use TypeLinksym or another higher-level API provided by
reflectdata. After the previous CL, there are no remaining uses of
WriteType elsewhere in the compiler, so unexport it to keep it that
way.

For #43701.

[git-generate]
cd src/cmd/compile/internal/reflectdata
rf '
	mv WriteType writeType
'

Change-Id: I294a78be570a47feb38a1ad4eaae7723653d5991
Reviewed-on: https://go-review.googlesource.com/c/go/+/284077
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>
2021-01-15 16:13:25 +00:00
Matthew Dempsky
14537e6e54 [dev.regabi] cmd/compile: move stkobj symbol generation to SSA
The code for allocating linksyms and recording that we need runtime
type descriptors is now concurrent-safe, so move it to where those
symbols are actually needed to reduce complexity and risk of failing
to generate all needed symbols in advance.

For #43701.

Change-Id: I759d2508213ac9a4e0b504b51a75fa10dfa37a8d
Reviewed-on: https://go-review.googlesource.com/c/go/+/284076
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Matthew Dempsky <mdempsky@google.com>
2021-01-15 16:13:14 +00:00
Matthew Dempsky
ab523fc510 [dev.regabi] cmd/compile: don't promote Byval CaptureVars if Addrtaken
We decide during escape analysis whether to pass closure variables by
value or reference. One of the factors that's considered is whether a
variable has had its address taken.

However, this analysis is based only on the user-written source code,
whereas order+walk may introduce rewrites that take the address of a
variable (e.g., passing a uint16 key by reference to the size-generic
map runtime builtins).

Typically this would be harmless, albeit suboptimal. But in #43701 it
manifested as needing a stack object for a function where we didn't
realize we needed one up front when we generate symbols.

Probably we should just generate symbols on demand, now that those
routines are all concurrent-safe, but this is a first fix.

Thanks to Alberto Donizetti for reporting the issue, and Cuong Manh Le
for initial investigation.

Fixes #43701.

Change-Id: I16d87e9150723dcb16de7b43f2a8f3cd807a9437
Reviewed-on: https://go-review.googlesource.com/c/go/+/284075
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>
2021-01-15 16:13:04 +00:00
Filippo Valsorda
ff196c3e84 crypto/x509: update iOS bundled roots to version 55188.40.9
Updates #38843

Change-Id: If76844e1caf23f98d814de89f77610de59d96a34
Reviewed-on: https://go-review.googlesource.com/c/go/+/284134
Trust: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2021-01-15 15:33:02 +00:00
David Chase
b7a698c73f [dev.regabi] test: disable test on windows because expected contains path separators.
The feature being tested is insensitive to the OS anyway.

Change-Id: Ieac9bfaafc6a54c00017afcc0b87bd8bbe80af7b
Reviewed-on: https://go-review.googlesource.com/c/go/+/284032
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-01-15 15:16:05 +00:00
Matthew Dempsky
4be7af23f9 [dev.regabi] cmd/compile: fix ICE during ir.Dump
fmt.go:dumpNodeHeader uses reflection to call all "func() bool"-typed
methods on Nodes during printing, but the OnStack method that I added
in CL 283233 isn't meant to be called on non-variables.

dumpNodeHeader does already guard against panics, as happen in some
other accessors, but not against Fatalf, as I was using in OnStack. So
simply change OnStack to use panic too.

Thanks to drchase@ for the report.

Change-Id: I0cfac84a96292193401a32fc5e7fd3c48773e008
Reviewed-on: https://go-review.googlesource.com/c/go/+/284074
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-01-15 04:08:47 +00:00
Jay Conrod
e125ccd10e cmd/go: in 'go mod edit', validate versions given to -retract and -exclude
Fixes #43280

Change-Id: Icb6c6807fe32a89202a2709d4a1c8d8af967628f
Reviewed-on: https://go-review.googlesource.com/c/go/+/283853
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-14 22:01:23 +00:00
Cherry Zhang
eb330020dc cmd/dist, cmd/go: pass -arch for C compilation on Darwin
On Apple Silicon Mac, the C compiler has an annoying default
target selection, depending on the ancestor processes'
architecture. In particular, if the shell or IDE is x86, when
running "go build" even with a native ARM64 Go toolchain, the C
compiler defaults to x86, causing build failures. We pass "-arch"
flag explicitly to avoid this situation.

Fixes #43692.
Fixes #43476.
Updates golang/vscode-go#1087.

Change-Id: I80b6a116a114e11e273c6886e377a1cc969fa3f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/283812
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-14 21:55:29 +00:00
Quim Muntal
84e8a06f62 cmd/cgo: remove unnecessary space in cgo export header
The cgo header has an unnecessary space in the exported function
definition on non-windows goos.

This was introduced in go1.16 so it would be good to fix it before
release.

Example:

// Current behavior, notice there is an unecessary space
// between extern and void
extern  void Foo();

// With this CL
extern void Foo();

Change-Id: Ic2c21f8d806fe35a7be7183dbfe35ac605b6e4f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/283892
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Katie Hockman <katie@golang.org>
2021-01-14 21:49:46 +00:00
Ian Lance Taylor
0c86b999c3 cmd/test2json: document passing -test.paniconexit0
For #29062
Fixes #43263

Change-Id: I160197c94cc4f936967cc22c82cec01663a14fe6
Reviewed-on: https://go-review.googlesource.com/c/go/+/283873
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-01-14 20:38:03 +00:00
Jay Conrod
9135795891 cmd/go/internal/load: report positions for embed errors
Fixes #43469
Fixes #43632

Change-Id: I862bb9da8bc3e4f15635bc33fd7cb5f12b917d71
Reviewed-on: https://go-review.googlesource.com/c/go/+/283638
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-14 17:42:00 +00:00
Than McIntosh
35b9c66601 [dev.regabi] cmd/compile,cmd/link: additional code review suggestions for CL 270863
This patch pulls in a few additional changes requested by code
reviewers for CL 270863 that were accidentally left out. Specifically,
guarding use of ORETJMP to insure it is not used when building dynlink
on ppc64le, and a tweaking the command line flags used to control
wrapper generation.

Change-Id: I4f96462e570180887eb8693e11badd83d142710a
Reviewed-on: https://go-review.googlesource.com/c/go/+/279527
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Trust: Than McIntosh <thanm@google.com>
2021-01-14 17:35:39 +00:00
Junchen Li
d9b79e53bb cmd/compile: fix wrong complement for arm64 floating-point comparisons
Consider the following example,

  func test(a, b float64, x uint64) uint64 {
    if a < b {
      x = 0
    }
    return x
  }

  func main() {
    fmt.Println(test(1, math.NaN(), 123))
  }

The output is 0, but the expectation is 123.

This is because the rewrite rule

  (CSEL [cc] (MOVDconst [0]) y flag) => (CSEL0 [arm64Negate(cc)] y flag)

converts

  FCMP NaN, 1
  CSEL MI, 0, 123, R0 // if 1 < NaN then R0 = 0 else R0 = 123

to

  FCMP NaN, 1
  CSEL GE, 123, 0, R0 // if 1 >= NaN then R0 = 123 else R0 = 0

But both 1 < NaN and 1 >= NaN are false. So the output is 0, not 123.

The root cause is arm64Negate not handle negation of floating comparison
correctly. According to the ARM manual, the meaning of MI, GE, and PL
are

  MI: Less than
  GE: Greater than or equal to
  PL: Greater than, equal to, or unordered

Because NaN cannot be compared with other numbers, the result of such
comparison is unordered. So when NaN is involved, unlike integer, the
result of !(a < b) is not a >= b, it is a >= b || a is NaN || b is NaN.
This is exactly what PL means. We add NotLessThanF to represent PL. Then
the negation of LessThanF is NotLessThanF rather than GreaterEqualF. The
same reason for the other floating comparison operations.

Fixes #43619

Change-Id: Ia511b0027ad067436bace9fbfd261dbeaae01bcd
Reviewed-on: https://go-review.googlesource.com/c/go/+/283572
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Keith Randall <khr@golang.org>
2021-01-14 17:23:11 +00:00
Jay Conrod
c73232d08f cmd/go/internal/load: refactor setErrorPos to PackageError.setPos
Renamed setErrorPos to setPos, made it a method of PackageError,
and removed its Package parameter and return value. This makes it
more clear that setPos modifies PackageError and does not create a new
Package.

Change-Id: I26c58d3d456c7c18a5c2598e1e8e158b1e6b4b36
Reviewed-on: https://go-review.googlesource.com/c/go/+/283637
Trust: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-14 16:50:30 +00:00
Jay Conrod
6aa28d3e06 go/build: report positions for go:embed directives
For #43469
For #43632

Change-Id: I9ac2da690344935da0e1dbe00b134dfcee65ec8a
Reviewed-on: https://go-review.googlesource.com/c/go/+/283636
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-14 16:50:23 +00:00
Cuong Manh Le
9734fd482d [dev.regabi] cmd/compile: use node walked flag to prevent double walk for walkSwitch
CL 283672 added a flag to prevent double walking, use that flag instead
of checking SwitchStmt.Compiled field.

Passes toolstash -cmp.

Change-Id: Idb8f9078412fb789f51ed4fc4206638011e38a93
Reviewed-on: https://go-review.googlesource.com/c/go/+/283733
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-14 08:31:22 +00:00
Matthew Dempsky
f97983249a [dev.regabi] cmd/compile: move more PAUTOHEAP to SSA construction
This CL moves almost all PAUTOHEAP handling code to SSA construction.
Instead of changing Names to PAUTOHEAP, escape analysis now only sets
n.Esc() to ir.EscHeap, and SSA handles creating the "&x"
pseudo-variables and associating them via Heapaddr.

This CL also gets rid of n.Stackcopy, which was used to distinguish
the heap copy of a parameter used within a function from the stack
copy used in the function calling convention. In practice, this is
always obvious from context: liveness and function prologue/epilogue
want to know about the stack copies, and everywhere else wants the
heap copy.

Hopefully moving all parameter/result handling into SSA helps with
making the register ABI stuff easier.

Also, the only remaining uses of PAUTOHEAP are now for closure
variables, so I intend to rename it to PCLOSUREVAR or get rid of those
altogether too. But this CL is already big and scary enough.

Change-Id: Ief5ef6205041b9d0ee445314310c0c5a98187e77
Reviewed-on: https://go-review.googlesource.com/c/go/+/283233
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-01-14 06:10:09 +00:00
Cuong Manh Le
4476300425 [dev.regabi] cmd/compile: use byte for CallExpr.Use
Reduce 16 byte for CallExpr, from 184 to 168 on 64-bit archs.

Passes toolstash -cmp.

Change-Id: I59c7609ccd03e8b4a7df8d2c30de8022ae312cee
Reviewed-on: https://go-review.googlesource.com/c/go/+/283732
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-01-14 05:48:36 +00:00
Cuong Manh Le
5a5ab24689 [dev.regabi] cmd/compile: do not rely on CallExpr.Rargs for detect already walked calls
Currently, there's an awkward issue with walk pass. When walking the AST
tree, the compiler generate code for runtime functions (using mkcall* variants),
add/modify the AST tree and walk new generated tree again. This causes the
double walking on some CallExpr, which is relying on checking Rargs to prevent
that. But checking Rargs has its own issue as well.

For functions that does not have arguments, this check is failed, and we
still double walk the CallExpr node.

This CL change the way that compiler detects double walking, by using
separated field instead of relying on Rargs. In perfect world, we should make
the compiler walks the AST tree just once, but it's not safe to do that at
this moment.

Passes toolstash -cmp.

Change-Id: Ifdd1e0f98940ddb1f574af2da2ac7f005b5fcadd
Reviewed-on: https://go-review.googlesource.com/c/go/+/283672
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-14 05:48:28 +00:00
Matthew Dempsky
983ac4b086 [dev.regabi] cmd/compile: fix ICE when initializing blank vars
CL 278914 introduced NameOffsetExpr to avoid copying ONAME nodes and
hacking up their offsets, but evidently staticinit subtly depended on
the prior behavior to allow dynamic initialization of blank variables.

This CL refactors the code somewhat to avoid using NameOffsetExpr with
blank variables, and to instead create dynamic assignments directly to
the global blank node. It also adds a check to NewNameOffsetExpr to
guard against misuse like this, since I suspect there could be other
cases still lurking within staticinit. (This code is overdue for an
makeover anyway.)

Thanks to thanm@ for bisect and test case minimization.

Fixes #43677.

Change-Id: Ic71cb5d6698382feb9548dc3bb9fd606b207a172
Reviewed-on: https://go-review.googlesource.com/c/go/+/283537
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-01-14 00:14:28 +00:00
Jay Conrod
7eb31d999c cmd/go: add hints to more missing sum error messages
When a command fails due to a module zip sum missing from go.sum,
if the module is in the build list, the go command will print a
'go mod download' command the user can run to fix it.

Previously, a hint was only printed if the module provided a package
in 'all'. We don't print a 'go get' hint, since we may not want to add
a new requirement to go.mod.

Fixes #43572

Change-Id: I88c61b1b42ad56c04e4482f6a1bb97ce758aaeff
Reviewed-on: https://go-review.googlesource.com/c/go/+/282712
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
2021-01-13 23:37:31 +00:00
Matthew Dempsky
d6d4673728 [dev.regabi] cmd/compile: fix GOEXPERIMENT=regabi builder
I misread the FIXME comment in InitLSym the first time. It's referring
to how InitLSym is supposed to be called exactly once per
function (see function documentation), but this is evidently not
actually the case currently in GOEXPERIMENT=regabi mode.

So just move the NeedFuncSym call below the GOEXPERIMENT=regabi
workaround.

Also, to fix the linux-arm64-{aws,packet} builders, move the call to
reflectdata.WriteFuncSyms() to after the second batch of functions are
compiled. This is necessary to make sure we catch all the funcsyms
that can be added by late function compilation.

Change-Id: I6d6396d48e2ee29c1fb007fa2b99e065b36375db
Reviewed-on: https://go-review.googlesource.com/c/go/+/283552
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Trust: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-01-13 23:07:18 +00:00
David Chase
c41b999ad4 [dev.regabi] cmd/compile: refactor abiutils from "gc" into new "abi"
Needs to be visible to ssagen, and might as well start clean to avoid
creating a lot of accidental dependencies.

Added some methods for export.

Decided to use a pointer instead of value for ABIConfig uses.

Tests ended up separate from abiutil itself; otherwise there are import cycles.

Change-Id: I5570e1e6a463e303c5e2dc84e8dd4125e7c1adcc
Reviewed-on: https://go-review.googlesource.com/c/go/+/282614
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-01-13 15:54:19 +00:00
David Chase
861707a8c8 [dev.regabi] cmd/compile: added limited //go:registerparams pragma for new ABI dev
This only works for functions; if you try it with a method, it will
fail.  It does work for both local package and imports.  For now,
it tells you when it thinks it sees either a declaration or a call of
such a function (this will normally be silent since no existing
code uses this pragma).

Note: it appears to be really darn hard to figure out if this
pragma was set for a method, and the method's call site.  Better
ir.Node wranglers than I might be able to make headway, but it
seemed unnecessary for this experiment.

Change-Id: I601c2ddd124457bf6d62f714d7ac871705743c0a
Reviewed-on: https://go-review.googlesource.com/c/go/+/279521
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-01-13 15:50:04 +00:00
David Chase
c1370e918f [dev.regabi] cmd/compile: add code to support register ABI spills around morestack calls
This is a selected copy from the register ABI experiment CL, focused
on the files and data structures that handle spilling around morestack.
Unnecessary code from the experiment was removed, other code was adapted.

Would it make sense to leave comments in the experiment as pieces are
brought over?

Experiment CL (for comparison purposes)
https://go-review.googlesource.com/c/go/+/28832

Change-Id: I92136f070351d4fcca1407b52ecf9b80898fed95
Reviewed-on: https://go-review.googlesource.com/c/go/+/279520
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-01-13 15:47:13 +00:00
David Chase
2abd24f3b7 [dev.regabi] test: make run.go error messages slightly more informative
This is intended to make it easier to write/change a test
without referring to the source code to figure out what the
error messages actually mean, or how to correct them.

Change-Id: Ie79ff7cd9f2d1fa605257fe97eace68adc8a6716
Reviewed-on: https://go-review.googlesource.com/c/go/+/281452
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-01-13 02:41:11 +00:00
David Chase
9a19481acb [dev.regabi] cmd/compile: make ordering for InvertFlags more stable
Current many architectures use a rule along the lines of

// Canonicalize the order of arguments to comparisons - helps with CSE.
((CMP|CMPW) x y) && x.ID > y.ID => (InvertFlags ((CMP|CMPW) y x))

to normalize comparisons as much as possible for CSE.  Replace the
ID comparison with something less variable across compiler changes.
This helps avoid spurious failures in some of the codegen-comparison
tests (though the current choice of comparison is sensitive to Op
ordering).

Two tests changed to accommodate modified instruction choice.

Change-Id: Ib35f450bd2bae9d4f9f7838ceaf7ec682bcf1e1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/280155
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-01-13 02:40:43 +00:00
Matthew Dempsky
d9acf6f3a3 [dev.regabi] cmd/compile: remove Func.ClosureType
The closure's type always matches the corresponding function's type,
so just use one instance rather than carrying around two. Simplifies
construction of closures, rewriting them during walk, and shrinks
memory usage.

Passes toolstash -cmp.

Change-Id: I83b8b8f435b02ab25a30fb7aa15d5ec7ad97189d
Reviewed-on: https://go-review.googlesource.com/c/go/+/283152
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2021-01-12 23:23:14 +00:00
Matthew Dempsky
41352fd401 [dev.regabi] cmd/compile: transform closures during walk
We used to transform directly called closures in a separate pass
before walk, because we couldn't guarantee whether we'd see the
closure call or the closure itself first. As of the last CL, this
ordering is always guaranteed, so we can rewrite calls and the closure
at the same time.

Change-Id: Ia6f4d504c24795e41500108589b53395d301123b
Reviewed-on: https://go-review.googlesource.com/c/go/+/283315
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2021-01-12 23:23:00 +00:00
Matthew Dempsky
d6ad88b4db [dev.regabi] cmd/compile: compile functions before closures
This CL reorders function compilation to ensure that functions are
always compiled before any enclosed function literals. The primary
goal of this is to reduce the risk of race conditions that arise due
to compilation of function literals needing to inspect data from their
closure variables. However, a pleasant side effect is that it allows
skipping the redundant, separate compilation of function literals that
were inlined into their enclosing function.

Change-Id: I03ee96212988cb578c2452162b7e99cc5e92918f
Reviewed-on: https://go-review.googlesource.com/c/go/+/282892
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
2021-01-12 23:22:41 +00:00
Matthew Dempsky
432f9ffb11 [dev.regabi] cmd/compile: unindent compileFunctions
No real code changes. Just splitting into a separate CL so the next
one is easier to review.

Change-Id: I428dc986b76370d8d3afc12cf19585f6384389d7
Reviewed-on: https://go-review.googlesource.com/c/go/+/283314
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2021-01-12 23:22:11 +00:00
Matthew Dempsky
cc90e7a51e [dev.regabi] cmd/compile: always use the compile queue
The compiler currently has two modes for compilation: one where it
compiles each function as it sees them, and another where it enqueues
them all into a work queue. A subsequent CL is going to reorder
function compilation to ensure that functions are always compiled
before any non-trivial function literals they enclose, and this will
be easier if we always use the compile work queue.

Also, fewer compilation modes makes things simpler to reason about.

Change-Id: Ie090e81f7476c49486296f2b90911fa0a466a5dd
Reviewed-on: https://go-review.googlesource.com/c/go/+/283313
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2021-01-12 23:22:04 +00:00
Matthew Dempsky
cd5b74d2df [dev.regabi] cmd/compile: call NeedFuncSym in InitLSym
InitLSym is where we're now generating ABI wrappers, so it seems as
good a place as any to make sure we're generating the degenerate
closure wrappers for declared functions and methods.

Change-Id: I097f34bbcee65dee87a97f9ed6f3f38e4cf2e2b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/283312
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2021-01-12 23:21:58 +00:00
Bryan C. Mills
ba76567bc2 cmd/go/internal/modload: delete unused *mvsReqs.next method
For #36460
Updates #36465

Change-Id: Id818dce21d39a48cf5fc9c015b30497dce9cd1ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/278596
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
2021-01-12 21:39:59 +00:00