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3 years ago[dev.typeparams] cmd/compile: implement clobberdead mode on ARM64
Cherry Mui [Thu, 3 Jun 2021 16:23:14 +0000 (12:23 -0400)]
[dev.typeparams] cmd/compile: implement clobberdead mode on ARM64

For debugging.

Change-Id: I5875ccd2413b8ffd2ec97a0ace66b5cae7893b24
Reviewed-on: https://go-review.googlesource.com/c/go/+/324765
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

3 years ago[dev.typeparams] cmd/compile: properly copy tilde value for unions in types2-to-types...
Dan Scales [Thu, 3 Jun 2021 17:59:35 +0000 (10:59 -0700)]
[dev.typeparams] cmd/compile: properly copy tilde value for unions in types2-to-types1 conversion

Change-Id: I2211020141886b348cddf9e33ab31b71c8478987
Reviewed-on: https://go-review.googlesource.com/c/go/+/324811
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>

3 years ago[dev.typeparams] reflect: guard abi_test.go with regabiargs build tag
Cherry Mui [Thu, 3 Jun 2021 19:23:22 +0000 (15:23 -0400)]
[dev.typeparams] reflect: guard abi_test.go with regabiargs build tag

The test in abi_test.go relies on the compiler to generate
register-ABI calls using a magic name. As of CL 300150 the name
loses its magic. Guard it with regabiargs for the use of
register-ABI calls.

Change-Id: Ib8b3c24f71ea5161d607c9becfb3027ceee40ac1
Reviewed-on: https://go-review.googlesource.com/c/go/+/324767
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

3 years ago[dev.typeparams] runtime: use ABIInternal callbackWrap in callbackasm1 on ARM64
Cherry Mui [Wed, 2 Jun 2021 23:52:39 +0000 (19:52 -0400)]
[dev.typeparams] runtime: use ABIInternal callbackWrap in callbackasm1 on ARM64

On Windows/ARM64, callbackasm1 calls callbackWrap via cgocallback.
cgocallback uses ABIInternal calling convention to call the
function. Pass the ABIInternal entry point to cgocallback.

Change-Id: I79d21b77525f6ac8dd50d34f4f304749419b2ad4
Reviewed-on: https://go-review.googlesource.com/c/go/+/324735
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
3 years ago[dev.typeparams] runtime: call cgocallbackg indirectly on ARM64
Cherry Mui [Wed, 2 Jun 2021 23:43:28 +0000 (19:43 -0400)]
[dev.typeparams] runtime: call cgocallbackg indirectly on ARM64

This is CL 312669, for ARM64.

cgocallback calls cgocallbackg after switching the stack. Call it
indirectly to bypass the linker's nosplit check. In particular,
this avoids a nosplit stack overflow on Windows when register ABI
is enabled.

Change-Id: I7054a750fb0ec2579d46004f94b46b6f7b9e3a21
Reviewed-on: https://go-review.googlesource.com/c/go/+/324734
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
3 years ago[dev.typeparams] runtime, internal/bytealg: port performance-critical functions to...
Cherry Mui [Wed, 2 Jun 2021 21:30:58 +0000 (17:30 -0400)]
[dev.typeparams] runtime, internal/bytealg: port performance-critical functions to register ABI on ARM64

This CL ports a few performance-critical assembly functions to use
register arguments directly. This is similar to CL 308931 and
CL 310184.

Change-Id: I6e30dfff17f76b8578ce8cfd51de21b66610fdb0
Reviewed-on: https://go-review.googlesource.com/c/go/+/324400
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

3 years ago[dev.typeparams] test: update all the typeparam tests to use the new union/tilde...
Dan Scales [Thu, 3 Jun 2021 01:12:14 +0000 (18:12 -0700)]
[dev.typeparams] test: update all the typeparam tests to use the new union/tilde syntax

Did a mix of tilde and non-tilde usage. Tilde notation is not quite
fully functional, so no tests are currently trying to distinguish
(fail/not fail) based on tilde usage.

Change-Id: Ib50cec2fc0684f9d9f3561c889fd44c7a7af458c
Reviewed-on: https://go-review.googlesource.com/c/go/+/324572
Trust: Dan Scales <danscales@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years ago[dev.typeparams] internal/bytealg: call memeqbody directly in memequal_varlen on...
Cherry Mui [Wed, 2 Jun 2021 22:00:12 +0000 (18:00 -0400)]
[dev.typeparams] internal/bytealg: call memeqbody directly in memequal_varlen on ARM64

Currently, memequal_varlen opens up a frame and call memequal,
which then tail-calls memeqbody. This CL changes memequal_varlen
tail-calls memeqbody directly.

This makes it simpler to switch to the register ABI in the next
CL.

Change-Id: Ia1367c0abb7f4755fe736c404411793fb9e5c04f
Reviewed-on: https://go-review.googlesource.com/c/go/+/324399
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
3 years ago[dev.typeparams] test: adjust codegen test for register ABI on ARM64
Cherry Mui [Tue, 1 Jun 2021 23:29:24 +0000 (19:29 -0400)]
[dev.typeparams] test: adjust codegen test for register ABI on ARM64

In codegen/arithmetic.go, previously there are MOVD's that match
for loads of arguments. With register ABI there are no more such
loads. Remove the MOVD matches.

Change-Id: I920ee2629c8c04d454f13a0c08e283d3528d9a64
Reviewed-on: https://go-review.googlesource.com/c/go/+/324251
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
3 years ago[dev.typeparams] cmd/internal/goobj: add duffzero/duffcopy to builtin list
Cherry Mui [Tue, 1 Jun 2021 23:18:25 +0000 (19:18 -0400)]
[dev.typeparams] cmd/internal/goobj: add duffzero/duffcopy to builtin list

duffzero and duffcopy are commonly referenced functions. Add them
to builtin list, so they are referenced by index, not by name.

Also change gcWriteBarrier to ABIInternal, which is changed in
CL 266638.

Regenerate the file.

Change-Id: If8550d9ed300ac2be930a7c58657a9cf1933ac1d
Reviewed-on: https://go-review.googlesource.com/c/go/+/324250
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
3 years ago[dev.typeparams] cmd/link: take function address in assembly in TestFuncAlign
Cherry Mui [Tue, 1 Jun 2021 23:16:33 +0000 (19:16 -0400)]
[dev.typeparams] cmd/link: take function address in assembly in TestFuncAlign

In TestFuncAlign we want to get the address of an assembly
function. Take the address in assembly, so we get the actual
function's address, not the wrapper's.

Change-Id: Idc1fe2c8426562c70f8f7d6e489584ef059bc556
Reviewed-on: https://go-review.googlesource.com/c/go/+/324249
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/types2: add Config.AllowTypeLists to control...
Robert Griesemer [Thu, 3 Jun 2021 00:50:47 +0000 (17:50 -0700)]
[dev.typeparams] cmd/compile/internal/types2: add Config.AllowTypeLists to control type list handling

Eventually the flag should not be set anymore, but we set it in the
compiler until all tests have been converted.

Also, convert some more types2 tests to use the type set notation.

Change-Id: I616599a3473451ab75d67272016b2bd3de6835af
Reviewed-on: https://go-review.googlesource.com/c/go/+/324571
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/types2: disallow ~T where T is a defined type...
Robert Griesemer [Thu, 3 Jun 2021 00:05:37 +0000 (17:05 -0700)]
[dev.typeparams] cmd/compile/internal/types2: disallow ~T where T is a defined type or an interface

Change-Id: I35f6f43db00d56847da48320308f2fcfff924738
Reviewed-on: https://go-review.googlesource.com/c/go/+/324570
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/types2: convert testdata/check tests to type...
Robert Griesemer [Wed, 2 Jun 2021 23:12:25 +0000 (16:12 -0700)]
[dev.typeparams] cmd/compile/internal/types2: convert testdata/check tests to type set sytax

Change-Id: I0c2dda10ba7cb40330545fd10fbacb8c84f66a2d
Reviewed-on: https://go-review.googlesource.com/c/go/+/324569
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/types2: convert testdata/fixedbugs tests to...
Robert Griesemer [Wed, 2 Jun 2021 22:45:43 +0000 (15:45 -0700)]
[dev.typeparams] cmd/compile/internal/types2: convert testdata/fixedbugs tests to type set sytax

Change-Id: I2ad94c71bebb93e0e3f4eba9d5199a3b3e9fa63d
Reviewed-on: https://go-review.googlesource.com/c/go/+/324530
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/types2: convert testdata/examples tests to...
Robert Griesemer [Wed, 2 Jun 2021 22:36:11 +0000 (15:36 -0700)]
[dev.typeparams] cmd/compile/internal/types2: convert testdata/examples tests to type set sytax

Change-Id: Ida3837c9cbb970a2b49cd1598c6e6e9de8aa9690
Reviewed-on: https://go-review.googlesource.com/c/go/+/324529
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

3 years ago[dev.typeparams] cmd/compile/internal/importer: review of gcimporter_test.go
Robert Griesemer [Wed, 2 Jun 2021 05:56:01 +0000 (22:56 -0700)]
[dev.typeparams] cmd/compile/internal/importer: review of gcimporter_test.go

This CL removes the // UNREVIEWED disclaimer at the top of the
file. This file is essentially a copy of its reviewed version
at src/go/internal/gcimporter/gcimporter_test.go with adjustments
to make it work for the compiler and types2. To see the changes
made with respect to the original, compare patchset 2 against
patchset 3.

Change-Id: Iaeb9a56a6a56f4c1d93e7bfedc5b1f1968fa6792
Reviewed-on: https://go-review.googlesource.com/c/go/+/324131
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

3 years ago[dev.typeparams] cmd/compile/internal/types2: eliminate need for unpack and asUnion...
Robert Griesemer [Fri, 28 May 2021 05:09:58 +0000 (22:09 -0700)]
[dev.typeparams] cmd/compile/internal/types2: eliminate need for unpack and asUnion functions

Change-Id: Iaa75b091d52f44939330e5945305aea323ba58f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/323355
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/types2: clean up type set/union intersection
Robert Griesemer [Fri, 28 May 2021 02:03:16 +0000 (19:03 -0700)]
[dev.typeparams] cmd/compile/internal/types2: clean up type set/union intersection

- Eliminate the need for bottom type: This is now represented by
  an empty union (denoting the set of no types).

- Clean up type set intersection and incorporate tilde information
  in intersection operation and satisfaction tests.

- Minor cleanups along the way.

- Note: The intersection algorithm does not always compute the
        largest possible intersection. To be addressed in a follow-up CL.

Change-Id: I7fa19df5996da36a4d8f29300d30a0aa4d8a3e5c
Reviewed-on: https://go-review.googlesource.com/c/go/+/323354
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

3 years ago[dev.typeparams] cmd/compile: fix export/import of constants with typeparam type
Dan Scales [Wed, 2 Jun 2021 07:03:25 +0000 (00:03 -0700)]
[dev.typeparams] cmd/compile: fix export/import of constants with typeparam type

A constant will have a TYPEPARAM type if it appears in a place where it
must match that typeparam type (e.g. in a binary operation with a
variable of that typeparam type). If so, then we must write out its
actual constant kind as well, so its constant val can be read in
properly during import.

Fixed some export/import tests which were casting some untyped constants
to avoid this problem.

Change-Id: I285ad8f1c8febbe526769c96e6b27acbd23050f0
Reviewed-on: https://go-review.googlesource.com/c/go/+/324189
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
3 years ago[dev.typeparams] cmd/link: include "go build" output in test logs
Matthew Dempsky [Wed, 2 Jun 2021 00:00:26 +0000 (17:00 -0700)]
[dev.typeparams] cmd/link: include "go build" output in test logs

If running "go build" outputs anything, write it to the test log even
if the test succeeds. This makes it easier to diagnose errors within
the compiler by adding print statements and finding them in the test
log, even if the compiler exits successfully.

Change-Id: Id04716c4e1dcd9220c35ea0040ea516c1dd5237c
Reviewed-on: https://go-review.googlesource.com/c/go/+/324329
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/importer: review of gcimporter.go
Robert Griesemer [Wed, 2 Jun 2021 06:01:41 +0000 (23:01 -0700)]
[dev.typeparams] cmd/compile/internal/importer: review of gcimporter.go

This CL removes the // UNREVIEWED disclaimer at the top of the
file. This file is essentially a copy of its reviewed version
at src/go/internal/gcimporter/gcimporter.go with adjustments to
make it work for the compiler and types2. To see the changes
made with respect to the original, compare patchset 1 against
patchset 2.

Change-Id: I0fd635730fb6bdee8cef1b89154f4049a6581751
Reviewed-on: https://go-review.googlesource.com/c/go/+/324132
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years ago[dev.typeparams] cmd/compile: sort iface fields before expansion
Matthew Dempsky [Wed, 2 Jun 2021 01:45:40 +0000 (18:45 -0700)]
[dev.typeparams] cmd/compile: sort iface fields before expansion

For toolstash -cmp compatibility with types2, we also need to sort
fields (or at least the embedded types) *before* expanding them. This
is relevant to what position information and parameter names are used
for methods when embedded interfaces have overlapping methods.

This came up in archive/zip, which has:

type fileInfoDirEntry interface {
fs.FileInfo
fs.DirEntry
}

and both of these embedded interfaces in turn have an "IsDir() bool"
method. Traditionally, cmd/compile would keep the method from
fs.FileInfo.IsDir, but with types2 it will now keep fs.DirEntry.IsDir
instead. This doesn't affect correctness at all, but it does end up in
DWARF sometimes.

Change-Id: Iac8d6321894be335466a76b5bf8a0c1b15a3581b
Reviewed-on: https://go-review.googlesource.com/c/go/+/324330
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years ago[dev.typeparams] cmd/compile/internal/importer: review of exportdata.go
Robert Griesemer [Wed, 2 Jun 2021 06:05:25 +0000 (23:05 -0700)]
[dev.typeparams] cmd/compile/internal/importer: review of exportdata.go

This CL removes the // UNREVIEWED disclaimer at the top of the
file. This file is essentially a copy of its reviewed version
at src/go/internal/gcimporter/exportdata.go with adjustments to
make it work for the compiler and types2. To see the changes
made with respect to the original, compare patchset 1 against
patchset 2.

Change-Id: I276d898ef238afa37ec6b9605496407df36cf7d0
Reviewed-on: https://go-review.googlesource.com/c/go/+/324133
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/importer: review of support.go
Robert Griesemer [Wed, 2 Jun 2021 05:48:20 +0000 (22:48 -0700)]
[dev.typeparams] cmd/compile/internal/importer: review of support.go

This CL removes the // UNREVIEWED disclaimer at the top of the
file. This file is essentially a copy of its reviewed version
at src/go/internal/gcimporter/support.go with adjustments to
make it work for the compiler and types2. To see the changes
made with respect to the original, compare patchset 1 against
patchset 2.

Change-Id: Icb8e7e7cac02751265c1020431018293826bad18
Reviewed-on: https://go-review.googlesource.com/c/go/+/324130
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/types2: replace Sum type with Union type
Robert Griesemer [Wed, 26 May 2021 00:49:32 +0000 (17:49 -0700)]
[dev.typeparams] cmd/compile/internal/types2: replace Sum type with Union type

- We still mostly ignore the tilde information.

- More consistent naming: A Union term is the pair (type, tilde).
  Rename Union.terms to Union.types; the Union.types and Union.tilde
  slices make up the Union terms.

- Replace Sum.is with Union.underIs: underIs iterates through all
  union terms and calls its argument function with the underlying
  type of the term (and thus can ignore the tilde information).
  This also eliminates the need to call under in the argument
  function.

- Added Union.is for situations where we need to consider the tilde
  information for each Union term.

Change-Id: I70fcf1813e072651dc0f61d52d5555642ee762fd
Reviewed-on: https://go-review.googlesource.com/c/go/+/323274
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years ago[dev.typeparams] cmd/compile: add dictionary argument to generic functions
Keith Randall [Fri, 16 Apr 2021 21:06:50 +0000 (14:06 -0700)]
[dev.typeparams] cmd/compile: add dictionary argument to generic functions

When converting from a generic function to a concrete implementation,
add a dictionary argument to the generic function (both an actual
argument at each callsite, and a formal argument of each
implementation).

The dictionary argument comes before all other arguments (including
any receiver).

The dictionary argument is checked for validity, but is otherwise unused.
Subsequent CLs will start using the dictionary for, e.g., converting a
value of generic type to interface{}.

Import/export required adding support for LINKSYMOFFSET, which is used
by the dictionary checking code.

Change-Id: I16a7a8d23c7bd6a897e0da87c69f273be9103bd7
Reviewed-on: https://go-review.googlesource.com/c/go/+/323272
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
3 years ago[dev.typeparams] runtime: update ABIInternal assembly with register ABI on ARM64
Cherry Mui [Sat, 29 May 2021 01:56:50 +0000 (21:56 -0400)]
[dev.typeparams] runtime: update ABIInternal assembly with register ABI on ARM64

mcall calls a closure (using ABIInternal) with an argument.
Update it to pass the argument in register.

Panic functions tail-call Go panic functions using ABIInternal.
Update them to pass the arguments in registers.

Race functions are called using ABIInternal from compiler-
instrumented code. Update them to receive the arguments in
registers.

Now all.bash passes with GOEXPERIMENT=regabi on ARM64 (at least on
macOS).

Change-Id: I648f6502c7eeb1422330c6c829181f12e08c7d0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/323937
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
3 years ago[dev.typeparams] reflect: implement register ABI for MakeFunc etc. on ARM64
Cherry Mui [Fri, 28 May 2021 00:20:16 +0000 (20:20 -0400)]
[dev.typeparams] reflect: implement register ABI for MakeFunc etc. on ARM64

Implement register ABI for reflect.MakeFunc and method Value Call
on ARM64.

Change-Id: I5487febb9ea764af5ccf5d7c94858ab0acec7cac
Reviewed-on: https://go-review.googlesource.com/c/go/+/323936
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
3 years ago[dev.typeparams] runtime: implement register ABI for reflectcall on ARM64
Cherry Mui [Thu, 27 May 2021 23:02:27 +0000 (19:02 -0400)]
[dev.typeparams] runtime: implement register ABI for reflectcall on ARM64

Implement register ABI version of reflectcall.

Now runtime tests pass with GOEXPERIMENT=regabiwrappers,regabireflect
on ARM64 (at least on macOS).

Change-Id: I2812cd96bdc13f8dc91c867e3f571921c0cdfc8a
Reviewed-on: https://go-review.googlesource.com/c/go/+/323935
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
3 years ago[dev.typeparams] runtime: mark assembly functions called directly from compiler ABIIn...
Cherry Mui [Thu, 27 May 2021 22:07:36 +0000 (18:07 -0400)]
[dev.typeparams] runtime: mark assembly functions called directly from compiler ABIInternal

For functions such as gcWriteBarrier and panicIndexXXX, the
compiler generates ABIInternal calls directly. And they must not
use wrappers because it follows a special calling convention or
the caller's PC is used. Mark them as ABIInternal.

Note that even though they are marked as ABIInternal, they don't
actually use the internal ABI, i.e. regabiargs is not honored for
now.

Now all.bash passes with GOEXPERIMENT=regabiwrappers (at least on
macOS).

Change-Id: I87e41964e6dc4efae03e8eb636ae9fa1d99285bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/323934
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
3 years agotest: fix error check messages for 2 types2 tests
Zachary Burkett [Sat, 29 May 2021 19:54:10 +0000 (19:54 +0000)]
test: fix error check messages for 2 types2 tests

Many compiler tests fail with -G=3 due to changes in error message format.
This commit fixes two of these tests, to ensure I am on the right track in review.

Updates #46447

Change-Id: I138956d536a1d48ca9198e6ddbfde13865bb5dd5
GitHub-Last-Rev: 0ed904b9fad5e6739fee02ab48c7bc66508d736b
GitHub-Pull-Request: golang/go#46445
Reviewed-on: https://go-review.googlesource.com/c/go/+/323314
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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3 years ago[dev.typeparams] cmd/compile: fix formatting
Keith Randall [Tue, 1 Jun 2021 23:57:59 +0000 (16:57 -0700)]
[dev.typeparams] cmd/compile: fix formatting

Looks like CL 322850 didn't have the change to ARM64Ops.go
properly gofmt'ed.

Change-Id: I1a080bc13ea27b897fbb91f18ded754ce440994b
Reviewed-on: https://go-review.googlesource.com/c/go/+/324109
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
3 years ago[dev.typeparams] internal/buildcfg: allow regabi GOEXPERIMENTs on ARM64
Cherry Mui [Thu, 27 May 2021 20:56:02 +0000 (16:56 -0400)]
[dev.typeparams] internal/buildcfg: allow regabi GOEXPERIMENTs on ARM64

It is not working yet, but allow enabling the experiments so we
can develop.

Change-Id: I957eb05acb4d80b2858ff1f8c16bbfb24e0f6e56
Reviewed-on: https://go-review.googlesource.com/c/go/+/323933
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
3 years ago[dev.typeparams] internal/abi: define ARM64 register ABI constants
Cherry Mui [Thu, 27 May 2021 22:22:49 +0000 (18:22 -0400)]
[dev.typeparams] internal/abi: define ARM64 register ABI constants

Change-Id: I9cdf0f2b6c1739f13a859a8e37351f8ecd77804a
Reviewed-on: https://go-review.googlesource.com/c/go/+/323932
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
3 years ago[dev.typeparams] reflect: call ABI0 spill/unspill functions on AMD64
Cherry Mui [Thu, 27 May 2021 22:41:12 +0000 (18:41 -0400)]
[dev.typeparams] reflect: call ABI0 spill/unspill functions on AMD64

CL 321950 changed runtime.spillArgs and unspillArgs to ABI0.
References to those functions should have been updated to ABI0,
but this one was missed.

Change-Id: I99238e4a96c945a47bec0981a415037578c73de4
Reviewed-on: https://go-review.googlesource.com/c/go/+/323931
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: David Chase <drchase@google.com>
3 years ago[dev.typeparams] cmd/compile: match register-ABI version of memmove call on ARM64
Cherry Mui [Sat, 29 May 2021 02:32:41 +0000 (22:32 -0400)]
[dev.typeparams] cmd/compile: match register-ABI version of memmove call on ARM64

Update the rule to match register-ABI version of the call for
inlining memmove.

Change-Id: Ic6da810e4d7ac391ffb766fcdc943985f0739624
Reviewed-on: https://go-review.googlesource.com/c/go/+/323930
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
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Reviewed-by: David Chase <drchase@google.com>
3 years ago[dev.typeparams] cmd/compile: update ARM64 CALL* ops for register ABI
Cherry Mui [Sat, 29 May 2021 02:23:00 +0000 (22:23 -0400)]
[dev.typeparams] cmd/compile: update ARM64 CALL* ops for register ABI

Now they take variable number of args.

Change-Id: I49c8bce9c3a403947eac03e397ae264a8f4fdd2c
Reviewed-on: https://go-review.googlesource.com/c/go/+/323929
Trust: Cherry Mui <cherryyz@google.com>
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Reviewed-by: David Chase <drchase@google.com>
3 years ago[dev.typeparams] all: merge master (2725522) into dev.typeparams
Cherry Mui [Tue, 1 Jun 2021 18:58:52 +0000 (14:58 -0400)]
[dev.typeparams] all: merge master (2725522) into dev.typeparams

Merge List:

+ 2021-06-01 272552275f A+C: update name
+ 2021-06-01 2bec019fb5 doc/go1.17: add release notes for register ABI
+ 2021-06-01 2e59cc5fb4 cmd/go: add [-src] to documentation
+ 2021-06-01 0b80cf1136 cmd/go: make 'go get' save sums for incidentally updated modules
+ 2021-05-30 3b770f2ccb go/types: don't declare 'comparable' when typeparams are disabled
+ 2021-05-30 1607c28172 go/types: unexport the GoVersion configuration option for Go 1.17
+ 2021-05-29 79bda65041 doc/go1.17: mention time.Layout
+ 2021-05-29 f6cc392d1d doc/go1.17: document text/template/parse.SkipFuncCheck
+ 2021-05-28 1419ca7cea doc/go1.17: mention new definitions of MSG_CMSG_CLOEXEC
+ 2021-05-28 6624771c83 doc/go1.17: mention testing.[TB].Setenv methods
+ 2021-05-28 bbda923592 doc/go1.17: mention new Windows SysProcAttr fields
+ 2021-05-28 6f58088bd8 doc/go1.17: document new go/build/BuildContext.ToolTags field
+ 2021-05-28 c295107708 doc/go1.17: mention new encoding/csv/Reader.FieldPos method
+ 2021-05-28 ccd9784edf doc/go1.17: document new debug/elf constant
+ 2021-05-28 3de3440fb9 go/ast: remove FuncDecl.IsMethod for Go 1.17
+ 2021-05-27 639acdc833 doc/go1.17: clarify that compress/lzw Reader and Writer types are new
+ 2021-05-27 193d514131 net/http: correct Client.Do doc about context cancelation
+ 2021-05-27 ab2ef4aaa7 doc/go1.17: document reflect changes
+ 2021-05-27 0ece95a0fe cmd/go: don't let 'go mod download' save sums for inconsistent requirements
+ 2021-05-27 cdcd02842d net: verify results from Lookup* are valid domain names
+ 2021-05-27 8bf5bf5173 cmd/compile: improve debug locations for partially live in-params
+ 2021-05-27 56af34f875 cmd/compile: place reg spills after OpArg{Int,Float}Reg ops
+ 2021-05-27 db66e9e15d cmd/link: accept Windows line-ending in TestTrampolineCgo
+ 2021-05-27 6b8c94b6c5 go/types: guard against check==nil in newNamed
+ 2021-05-27 fca7b8f3e6 Revert "net: verify results from Lookup* are valid domain names"
+ 2021-05-27 950fa11c4c net/http/httputil: always remove hop-by-hop headers
+ 2021-05-27 9bc52686da cmd/go,cmd/link: do not check for staleness in most tests
+ 2021-05-27 6ff0ae2aa4 crypto/elliptic: fix typo in p521Point type name
+ 2021-05-26 3075ffc93e os: deflake TestFdReadRace
+ 2021-05-26 a62c08734f src/os: revert accidentally submitted change
+ 2021-05-26 1d5298d46a doc/go1.17: document net/... changes
+ 2021-05-26 0fbecece98 doc/go1.17: document syscall changes
+ 2021-05-26 02beecb397 mime: document use of the Shared MIME-Info Database
+ 2021-05-26 a92460fd2f doc/go1.17: add release notes for runtime/metrics package
+ 2021-05-26 55aefbb268 doc/go1.17: mention enabling frame pointer on all ARM64
+ 2021-05-26 39da9ae513 go/types: ensure that Named.check is nilled out once it is expanded
+ 2021-05-26 bfd7798a6c runtime,cmd/link/internal/ld: fix typos
+ 2021-05-26 e4615ad74d math/big: move division into natdiv.go
+ 2021-05-26 d050238bb6 doc/go1.17: fix formatting for time changes
+ 2021-05-25 74242baa41 archive/zip: only preallocate File slice if reasonably sized

Change-Id: I8a02edee1a6889547c52aa28c53cf8250766ab2c

3 years ago[dev.typeparams] cmd/compile: refactor noder/irgen helpers
Matthew Dempsky [Thu, 27 May 2021 09:47:25 +0000 (02:47 -0700)]
[dev.typeparams] cmd/compile: refactor noder/irgen helpers

This CL refactors the code for invoking the types2 checker and for
validating //go:embed directives to be easier to reuse separately.
No functional change.

Change-Id: I706f4ea4a26b1f1d2f4064befcc0777a1067383d
Reviewed-on: https://go-review.googlesource.com/c/go/+/323310
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Trust: Matthew Dempsky <mdempsky@google.com>

3 years ago[dev.typeparams] cmd/compile: handle ONONAME in subster.node
Cuong Manh Le [Mon, 31 May 2021 17:56:14 +0000 (00:56 +0700)]
[dev.typeparams] cmd/compile: handle ONONAME in subster.node

Fixes #46472

Change-Id: I27802978fa0c3bb32a29e452165a6fcac93473bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/323731
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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3 years agoA+C: update name
OneOfOne [Fri, 21 May 2021 20:29:46 +0000 (15:29 -0500)]
A+C: update name

Change-Id: I1f88304858da5147bfd082c2fc2b7d24ed371cd8
Reviewed-on: https://go-review.googlesource.com/c/go/+/321955
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 years agodoc/go1.17: add release notes for register ABI
Cherry Mui [Thu, 27 May 2021 14:13:00 +0000 (10:13 -0400)]
doc/go1.17: add release notes for register ABI

Also delete the TODO for the linker section.

Updates #44513.
Updates #40724.

Change-Id: I4d62a907e8c3070831a052cdfe1e21648698df12
Reviewed-on: https://go-review.googlesource.com/c/go/+/323289
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
3 years agocmd/go: add [-src] to documentation
Vitaly Zdanevich [Sat, 29 May 2021 13:49:51 +0000 (13:49 +0000)]
cmd/go: add [-src] to documentation

Change-Id: I554b5021386575af6ff44571a95bb31b38a0547f
GitHub-Last-Rev: 20aaec3aa0baee6112fc2e4d72e83f78b72a44ea
GitHub-Pull-Request: golang/go#45956
Reviewed-on: https://go-review.googlesource.com/c/go/+/317109
Run-TryBot: Jay Conrod <jayconrod@google.com>
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Reviewed-by: Jay Conrod <jayconrod@google.com>
Trust: Bryan C. Mills <bcmills@google.com>

3 years agocmd/go: make 'go get' save sums for incidentally updated modules
Jay Conrod [Wed, 26 May 2021 19:29:39 +0000 (15:29 -0400)]
cmd/go: make 'go get' save sums for incidentally updated modules

When 'go get' updates a module, it may update another module in the
build list that provides a package in 'all' that wasn't loaded as part
of the 'go get' command. If 'go get' doesn't add a sum for that
module, builds may fail later.

With this change, 'go get' will fetch a sum for the content of an
updated module if we had a sum for the version before the update.

'go get' won't load the complete package graph, so there are still
cases where the build may be broken, like when an updated (but not
loaded) package imports a package from a new module.

Fixes #44129

Change-Id: I62eba3df4137a3e84e2ca8d549c36eec3670f08c
Reviewed-on: https://go-review.googlesource.com/c/go/+/322832
Trust: Jay Conrod <jayconrod@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
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3 years ago[dev.typeparams] cmd/compile: simplify formatting of defined types
Matthew Dempsky [Mon, 31 May 2021 01:13:36 +0000 (18:13 -0700)]
[dev.typeparams] cmd/compile: simplify formatting of defined types

The existing code for deciding how to format defined type names is
incredibly convoluted and difficult to follow. In particular, I'm
looking at changing how Vargen works, and I couldn't tell from the
existing code whether my idea was viable.

This CL overhauls the logic to be much simpler with fewer special
cases, while overall behaving the same. A few notable intentional
differences from how the current code works:

1. The old code replaced the 'S' verb for fmtTypeGo and fmtTypeDebug
to 'v', whereas the new code leaves it alone. There's currently no
code that actually uses 'S' with these modes anyway, so it doesn't
seem important to maintain this special case. If future code wants 'v'
formatting, it should just use 'v' instead of 'S'.

2. The old code included Vargen for fmtTypeIDName mode with the 'S'
verb; but again, this functionality isn't actually used. I think it
would make sense for fmtTypeIDName to include Vargen like fmtTypeID
does (Vargen is logically part of the type's identity after all), but
that breaks tests and toolstash -cmp. So for now, this is left as a
TODO to investigate in the future.

3. The old code only added Vargen for fmtTypeID in 'v' mode when
printing types from the local package. But because we don't currently
support exporting function-scoped defined types anyway, this is again
irrelevant. In fact, once we *do* support exporting function-scoped
defined types, we'll need to include Vargen to generate the linker
symbols correctly.

Passes toolstash -cmp.

Change-Id: I4e481276bc4dc8d5b17eebf597b612737f26be5b
Reviewed-on: https://go-review.googlesource.com/c/go/+/323709
Trust: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
3 years agogo/types: don't declare 'comparable' when typeparams are disabled
Rob Findley [Sun, 30 May 2021 02:14:12 +0000 (22:14 -0400)]
go/types: don't declare 'comparable' when typeparams are disabled

Fixes #46453

Change-Id: I92b9b1e43ec5182162b2eeeb667f1f548ea373a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/323609
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years agogo/types: unexport the GoVersion configuration option for Go 1.17
Rob Findley [Fri, 28 May 2021 15:58:05 +0000 (11:58 -0400)]
go/types: unexport the GoVersion configuration option for Go 1.17

The GoVersion field was added to types.Config as part of the work on
type parameters. Specifically, it was added to be consistent with
cmd/compile/internal/types2, which requires such an option.

This configuration option is useful, but is also non-trivial and did not
go through the proposal process. Unexport it for Go 1.17; we can create
a proposal to export it for Go 1.18.

Fixes #46296

Change-Id: Id82d8a7096887dcfc404c4d6d8da9c761b316609
Reviewed-on: https://go-review.googlesource.com/c/go/+/323430
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years agodoc/go1.17: mention time.Layout
Ian Lance Taylor [Sat, 29 May 2021 00:32:15 +0000 (17:32 -0700)]
doc/go1.17: mention time.Layout

For #44513

Change-Id: Id4624e977654f7e8c489508a9dce98c9fab621a6
Reviewed-on: https://go-review.googlesource.com/c/go/+/323490
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
3 years agodoc/go1.17: document text/template/parse.SkipFuncCheck
Ariel Mashraki [Mon, 19 Apr 2021 19:26:47 +0000 (22:26 +0300)]
doc/go1.17: document text/template/parse.SkipFuncCheck

Documents the newly added mode that skips type checking
functions as per CL 301493.

Fixes #46025
For #34652
For #44513
For #38627

Change-Id: I56c4f65924702a931944796e39f43cfeb66abc8a
Reviewed-on: https://go-review.googlesource.com/c/go/+/311569
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Trust: Michael Knyszek <mknyszek@google.com>

3 years agodoc/go1.17: mention new definitions of MSG_CMSG_CLOEXEC
Ian Lance Taylor [Fri, 28 May 2021 00:25:43 +0000 (17:25 -0700)]
doc/go1.17: mention new definitions of MSG_CMSG_CLOEXEC

For #44513

Change-Id: I8c0070b116ee520a76726eb9d3dcbdd489a1fb1f
Reviewed-on: https://go-review.googlesource.com/c/go/+/323351
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
3 years agodoc/go1.17: mention testing.[TB].Setenv methods
Ian Lance Taylor [Fri, 28 May 2021 00:33:01 +0000 (17:33 -0700)]
doc/go1.17: mention testing.[TB].Setenv methods

For #41260
For #44513

Change-Id: I47ac0c751dafeb05abfe66fdf77938774164915f
Reviewed-on: https://go-review.googlesource.com/c/go/+/323353
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: roger peppe <rogpeppe@gmail.com>
3 years agodoc/go1.17: mention new Windows SysProcAttr fields
Ian Lance Taylor [Fri, 28 May 2021 00:30:08 +0000 (17:30 -0700)]
doc/go1.17: mention new Windows SysProcAttr fields

For #44011
For #44513

Change-Id: I512466f2e775e36098eb36ca7ef82333cd9e632a
Reviewed-on: https://go-review.googlesource.com/c/go/+/323352
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
3 years agodoc/go1.17: document new go/build/BuildContext.ToolTags field
Ian Lance Taylor [Fri, 28 May 2021 00:19:12 +0000 (17:19 -0700)]
doc/go1.17: document new go/build/BuildContext.ToolTags field

For #44513

Change-Id: Ib21af742e574fcaa7e38bb437d42dbeed9d01f0b
Reviewed-on: https://go-review.googlesource.com/c/go/+/323350
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
3 years agodoc/go1.17: mention new encoding/csv/Reader.FieldPos method
Ian Lance Taylor [Thu, 27 May 2021 23:24:49 +0000 (16:24 -0700)]
doc/go1.17: mention new encoding/csv/Reader.FieldPos method

For #44221
For #44513

Change-Id: I2d2d1c55255f4411c11fd51f0f3ae726cbf4d136
Reviewed-on: https://go-review.googlesource.com/c/go/+/323349
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: roger peppe <rogpeppe@gmail.com>
3 years agodoc/go1.17: document new debug/elf constant
Ian Lance Taylor [Thu, 27 May 2021 23:16:37 +0000 (16:16 -0700)]
doc/go1.17: document new debug/elf constant

For #39677
For #44513

Change-Id: I8c4193fd4359b83e6739e7e30a3a42b5f21b0f1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/323275
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
3 years agogo/ast: remove FuncDecl.IsMethod for Go 1.17
Rob Findley [Fri, 28 May 2021 02:27:55 +0000 (22:27 -0400)]
go/ast: remove FuncDecl.IsMethod for Go 1.17

The IsMethod method was added to FuncDecl in the process of working on
support for type parameters, but is now only used in one place. It also
didn't go through the proposal process. Remove it for 1.17.

Also clean up a doc comment that mentioned type parameters.

Fixes #46297

Change-Id: I432bdd626324f613baf059540b7c5436985b2b16
Reviewed-on: https://go-review.googlesource.com/c/go/+/323369
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years ago[dev.typeparams] cmd/compile/internal/noder: refactor irgen import handling
Matthew Dempsky [Thu, 27 May 2021 09:48:33 +0000 (02:48 -0700)]
[dev.typeparams] cmd/compile/internal/noder: refactor irgen import handling

Rather than re-parsing and re-resolving the import path string, use
the PkgName object provided by types2 to determine what package path
it refers to.

Also, decompose importfile into smaller functions, so that we can
directly pass the already-resolved package path to the importer.

Finally, switch to simply using height as calculated by types2 rather
than redoing the calculations.

Change-Id: I3338f4e68387b2835b2e58d6df65d740d6a648cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/323309
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Trust: Dan Scales <danscales@google.com>
Trust: Matthew Dempsky <mdempsky@google.com>

3 years agodoc/go1.17: clarify that compress/lzw Reader and Writer types are new
Ian Lance Taylor [Thu, 27 May 2021 23:12:12 +0000 (16:12 -0700)]
doc/go1.17: clarify that compress/lzw Reader and Writer types are new

For #26535
For #44513
For #46005

Change-Id: I70d3711ab6451a61b526abb3da8e91243f637656
Reviewed-on: https://go-review.googlesource.com/c/go/+/323273
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
3 years ago[dev.typeparams] cmd/compile/internal/inline: refactor mkinlcall
Matthew Dempsky [Thu, 27 May 2021 09:47:04 +0000 (02:47 -0700)]
[dev.typeparams] cmd/compile/internal/inline: refactor mkinlcall

This CL refactors mkinlcall by extracting the core InlinedCallExpr
construction code into a new "oldInline" function, and adds a new
"NewInline" hook point that can be overriden with a new inliner
implementation that only needs to worry about the details of
constructing the InlinedCallExpr.

It also moves the delayretvars optimization check into CanInline, so
it's performed just once per inlinable function rather than once for
each inlined call.

Finally, it skips printing the function body about to be inlined (and
updates the couple of regress tests that expected this output). We
already report the inline body as it was saved, and this diagnostic is
only applicable to the current inliner, which clones existing function
body instances. In the unified IR inliner, we'll directly construct
inline bodies from the serialized representation.

Change-Id: Ibdbe617da83c07665dcbda402cc8d4d4431dde2f
Reviewed-on: https://go-review.googlesource.com/c/go/+/323290
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
3 years ago[dev.typeparams] test: trim list of expected -G=3 failures
Matthew Dempsky [Thu, 27 May 2021 09:42:15 +0000 (02:42 -0700)]
[dev.typeparams] test: trim list of expected -G=3 failures

15 more tests are passing from recent changes. 83 still to go.

Change-Id: I155b3e3db966d604ccec8bf3a7c182421f3d26c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/323211
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years ago[dev.typeparams] cmd/compile: add and use ir.RawOrigExpr
Matthew Dempsky [Thu, 27 May 2021 09:50:17 +0000 (02:50 -0700)]
[dev.typeparams] cmd/compile: add and use ir.RawOrigExpr

This CL adds ir.RawOrigExpr, which can be used to represent arbitrary
constant expressions without needing to build and carry around an
entire IR representation of the original expression. It also allows
distinguishing how the constant was originally written by the
user (e.g., "0xff" vs "255").

This CL then also updates irgen to make use of this functionality for
expressions that were constant folded by types2.

Change-Id: I41e04e228e715ae2735c357b75633a2d08ee7021
Reviewed-on: https://go-review.googlesource.com/c/go/+/323210
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
3 years ago[dev.typeparams] cmd/compile: tweaks to match types2
Matthew Dempsky [Thu, 27 May 2021 02:52:31 +0000 (19:52 -0700)]
[dev.typeparams] cmd/compile: tweaks to match types2

This CL makes a handful of changes to either bring existing compiler
output consistent with what types2 produces or to make it easier to
reproduce with types2:

1. The position for embedded fields is corrected to the position of
the syntax.Field, rather than the syntax.Type.

2. Methods and embedded types are sorted in export data the same way
that types2 sorts them.

3. Don't write out position information for OLITERALs that don't have
their own position (i.e., references to named constants).

Change-Id: Ic3979215ae9ef280cfbba7b44c236e03fc12a2ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/323209
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Trust: Matthew Dempsky <mdempsky@google.com>

3 years agonet/http: correct Client.Do doc about context cancelation
Manlio Perillo [Thu, 27 May 2021 08:44:57 +0000 (10:44 +0200)]
net/http: correct Client.Do doc about context cancelation

The documentation of the Client.Do method and Get function incorrectly
stated that, in case of context cancelation, the returned url.Error
Timeout method returns true.

Update the documentation to correctly match the implementation.
See also CL 200798 that, due to an oversight, corrected only the
documentation of the Client.Get method.

Remove a TODO note added in CL 125575 (net/http: document that Client
methods always return *url.Error), since it is no longer applicable
after CL 200798 (net/http: fix and lock-in Client.Do docs on request
cancelation).

Fixes #46402

Change-Id: Ied2ee971ba22b61777762dbb19f16e08686634ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/323089
Reviewed-by: Damien Neil <dneil@google.com>
Trust: Michael Knyszek <mknyszek@google.com>

3 years agodoc/go1.17: document reflect changes
Damien Neil [Thu, 27 May 2021 01:06:26 +0000 (18:06 -0700)]
doc/go1.17: document reflect changes

For #44513.
Fixes #46019.

Change-Id: Ica84edd5703a4ccf343ff01e10483f8d51d1c79f
Reviewed-on: https://go-review.googlesource.com/c/go/+/323069
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 years agocmd/go: don't let 'go mod download' save sums for inconsistent requirements
Jay Conrod [Mon, 24 May 2021 20:47:45 +0000 (16:47 -0400)]
cmd/go: don't let 'go mod download' save sums for inconsistent requirements

'go mod download' calls modload.LoadModFile early to find the main
module path in order to validate arguments. LoadModFile may write
go.mod and go.sum to fix formatting and add a go directive. This calls
keepSums, which, in eager mode, loaded the complete module graph in
order to find out what sums are needed to load the complete module
graph. If go.mod requires a lower version of a module than will be
selected later, keepSums causes the sum for that version's go.mod to
be retained, even though it isn't needed later after a consistent
go.mod is written.

This CL fixes keepSums not to load the graph if it hasn't already been
loaded (whether eager or lazy), addressing comments from CL 318629.

For #45332

Change-Id: I20d4404004e4ad335450fd0fd753e7bc0060f702
Reviewed-on: https://go-review.googlesource.com/c/go/+/322369
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

3 years agonet: verify results from Lookup* are valid domain names
Roland Shoemaker [Thu, 27 May 2021 17:40:06 +0000 (10:40 -0700)]
net: verify results from Lookup* are valid domain names

For the methods LookupCNAME, LookupSRV, LookupMX, LookupNS, and
LookupAddr check that the returned domain names are in fact valid DNS
names using the existing isDomainName function.

Thanks to Philipp Jeitner and Haya Shulman from Fraunhofer SIT for
reporting this issue.

Fixes #46241
Fixes CVE-2021-33195

Change-Id: I47a4f58c031cb752f732e88bbdae7f819f0af4f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/323131
Trust: Roland Shoemaker <roland@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
3 years ago[dev.typeparams] cmd/compile: use old export format if not compiling with generics
Dan Scales [Thu, 27 May 2021 18:18:13 +0000 (11:18 -0700)]
[dev.typeparams] cmd/compile: use old export format if not compiling with generics

Write out export data with the old export format (iexportVersionPosCol)
if not compiling with generics (-G=0, the default value). This helps
ensure we don't break tests involving x/tools/go/gcexportdata (since we
can't modify that tool yet to use the new format).

Change-Id: I5f9bce44ed1e0696fc65fead6bab9e30de88461d
Reviewed-on: https://go-review.googlesource.com/c/go/+/323189
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Trust: Robert Griesemer <gri@golang.org>

3 years agocmd/compile: improve debug locations for partially live in-params
Than McIntosh [Mon, 10 May 2021 11:31:57 +0000 (07:31 -0400)]
cmd/compile: improve debug locations for partially live in-params

During DWARF debug location generation, as a preamble to the main data
flow analysis, examine the function entry block to look for in-params
arriving in registers that are partially or completely dead, and
insert new OpArg{Int,Float}Reg values for the dead or partially-dead
pieces. In addition, add entries to the f.NamedValues table for
incoming live register-resident params that don't already have
entries. This helps create better/saner DWARF location expressions for
params. Example:

  func foo(s string, used int, notused int) int {
      return len(s) + used
  }

When optimization is complete for this function, the parameter
"notused" is completely dead, meaning that there is no entry for it in
the f.NamedValues table (which then means we don't emit a DWARF
variable location expression for it in the function enty block). In
addition, since only the length field of "s" is used, there is no
DWARF location expression for the other component of "s", leading to
degraded DWARF.

There are still problems/issues with DWARF location generation, but
this does improve things with respect to being able to print the
values of incoming parameters when stopped in the debugger at the
entry point of a function (when optimization is enabled).

Updates #40724.

Change-Id: I5bb5253648942f9fd33b081fe1a5a36208e75785
Reviewed-on: https://go-review.googlesource.com/c/go/+/322631
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
3 years agocmd/compile: place reg spills after OpArg{Int,Float}Reg ops
Than McIntosh [Tue, 25 May 2021 14:13:07 +0000 (10:13 -0400)]
cmd/compile: place reg spills after OpArg{Int,Float}Reg ops

Tweak the register allocator to maintain the invariant that
OpArg{Int,Float}Reg values are placed together at the start of the
entry block, before any other non-pseudo-op values. Without this
change, when the register allocator adds spills we can wind up with an
interleaving of OpArg*Reg and stores, which complicates debug location
analysis.

Updates #40724.

Change-Id: Icf30dd814a9e25263ecbea2e48feb840a6e7f2bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/322630
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
3 years agocmd/link: accept Windows line-ending in TestTrampolineCgo
Cherry Mui [Thu, 27 May 2021 14:11:42 +0000 (10:11 -0400)]
cmd/link: accept Windows line-ending in TestTrampolineCgo

Apparently C printf emits "\r\n" on Windows. Accept that.

Change-Id: If87ba41435e3147d3892cfc3fe3a105b066ff0aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/322973
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
3 years ago[dev.typeparams] cmd/compile/internal/types2: ensure that Named.check is nilled out...
Robert Griesemer [Thu, 27 May 2021 04:42:09 +0000 (21:42 -0700)]
[dev.typeparams] cmd/compile/internal/types2: ensure that Named.check is nilled out once it is expanded

This is a port of
- https://golang.org/cl/318849
- https://golang.org/cl/322974

For #45580.

Change-Id: Ie0700ed6c8d472305d5ba7ff97da1ae063152aa3
Reviewed-on: https://go-review.googlesource.com/c/go/+/323030
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
3 years agogo/types: guard against check==nil in newNamed
Rob Findley [Thu, 27 May 2021 16:35:01 +0000 (12:35 -0400)]
go/types: guard against check==nil in newNamed

When importing generic named types, it is possible for Checker.newNamed
to be called during type instantiation when the Checker is nil.

In this case we should be able to safely skip this delayed expansion.

Updates #45580

Change-Id: I75422100464d57eba24642c93e06e8b47d904fc3
Reviewed-on: https://go-review.googlesource.com/c/go/+/322974
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years ago[dev.typeparams] cmd/compile: enable register args on ARM64
Cherry Mui [Tue, 25 May 2021 23:19:08 +0000 (19:19 -0400)]
[dev.typeparams] cmd/compile: enable register args on ARM64

Now it will be used for functions marked go:registerparams.

test/abi tests are passing with it.

Change-Id: I5af37ae6b79a1064832a42c7ef5f2cc0b5b6a342
Reviewed-on: https://go-review.googlesource.com/c/go/+/322854
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
3 years ago[dev.typeparams] cmd/compile: add arg/result register load/spill code on ARM64
Cherry Mui [Tue, 25 May 2021 22:05:02 +0000 (18:05 -0400)]
[dev.typeparams] cmd/compile: add arg/result register load/spill code on ARM64

Add code that loads results into registers (used in defer return
code path) and spills argument registers (used for partially lived
in-register args).

Move some code from the amd64 package to a common place.

Change-Id: I8d59b68693048fdba86e10769c4ac58de5fcfb64
Reviewed-on: https://go-review.googlesource.com/c/go/+/322851
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
3 years agoRevert "net: verify results from Lookup* are valid domain names"
Roland Shoemaker [Thu, 27 May 2021 15:14:18 +0000 (15:14 +0000)]
Revert "net: verify results from Lookup* are valid domain names"

This reverts commit c89f1224a544cde464fcb86e78ebb0cc97eedba2.

Reason for revert: reverting so we can apply follow-up fixes and do a single cherry pick.

Change-Id: I16c6283a0bcab056216f330fb98fa3b5f2b0780c
Reviewed-on: https://go-review.googlesource.com/c/go/+/323129
Reviewed-by: Katie Hockman <katie@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>

3 years agonet/http/httputil: always remove hop-by-hop headers
Filippo Valsorda [Fri, 21 May 2021 18:02:30 +0000 (14:02 -0400)]
net/http/httputil: always remove hop-by-hop headers

Previously, we'd fail to remove the Connection header from a request
like this:

    Connection:
    Connection: x-header

Fixes #46313
Fixes CVE-2021-33197

Change-Id: Ie3009e926ceecfa86dfa6bcc6fe14ff01086be7d
Reviewed-on: https://go-review.googlesource.com/c/go/+/321929
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
Trust: Katie Hockman <katie@golang.org>
Trust: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>

3 years agocmd/go,cmd/link: do not check for staleness in most tests
Bryan C. Mills [Tue, 25 May 2021 16:21:11 +0000 (12:21 -0400)]
cmd/go,cmd/link: do not check for staleness in most tests

Instead, check that stale packages in the standard library
are not rebuilt when already present in the build cache,
and are not installed implicitly when rebuilt.

We retain the staleness checks for the runtime package in tests
involving '-i', because those are guaranteed to fail anyway if the
package is stale and the "stale" failure message is arguably clearer.
They can be removed if/when we remove the '-i' flag, but the runtime
package is less likely to become stale because it does not have cgo
dependencies.

Fixes #46347
Updates #33598
Updates #35459
Updates #41696

Change-Id: I7b0a808addd930f9f4911ff53ded62272af75a40
Reviewed-on: https://go-review.googlesource.com/c/go/+/322629
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
3 years agocrypto/elliptic: fix typo in p521Point type name
Filippo Valsorda [Thu, 13 May 2021 17:45:55 +0000 (13:45 -0400)]
crypto/elliptic: fix typo in p521Point type name

Change-Id: I6cab3624c875d9a70441a560e84f91c9b2df17b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/320070
Trust: Filippo Valsorda <filippo@golang.org>
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
3 years ago[dev.typeparams] cmd/compile: inlining tweaks for toolstash
Matthew Dempsky [Mon, 24 May 2021 11:41:58 +0000 (04:41 -0700)]
[dev.typeparams] cmd/compile: inlining tweaks for toolstash

This CL makes to minor changes motivated by making it easier to make
large-scale changes to the inliner while satisfying toolstash -cmp:

1. When creating inlining variables, make sure to preserve the
AutoTemp flag. This is necessary so that temporary variables
introduced by rewriting f(g()) calls during typecheck stay autotemp
after inlining and are (correctly) omitted from DWARF debugging
information.

2. When sorting variables for stack frame layout, use a stable
sort. This ensures that layout is insensitive to whether deadcode
elimination happens before or after inlining.

Change-Id: I672e752a873c7e16749b9873fd6573607e074309
Reviewed-on: https://go-review.googlesource.com/c/go/+/323011
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
3 years ago[dev.typeparams] cmd/compile: simplify inlining variadic calls
Matthew Dempsky [Wed, 26 May 2021 03:14:33 +0000 (20:14 -0700)]
[dev.typeparams] cmd/compile: simplify inlining variadic calls

We already have and use FixVariadicCall to normalize non-dotted calls
to variadic functions elsewhere in the compiler to simplify rewriting
of function calls. This CL updates inl.go to use it too.

A couple tests need to be updated to (correctly) expect diagnostics
about "... argument" instead of a slice literal. This is because
inl.go previously failed to set Implicit on the slice literal node.

Change-Id: I76bd79b95ae1f16e3b26ff7e9e1c468f538fd1f0
Reviewed-on: https://go-review.googlesource.com/c/go/+/323009
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
3 years ago[dev.typeparams] cmd/compile: simplify ~r/~b naming
Matthew Dempsky [Wed, 26 May 2021 20:54:31 +0000 (13:54 -0700)]
[dev.typeparams] cmd/compile: simplify ~r/~b naming

The compiler renames anonymous and blank result parameters to ~rN or
~bN, but the current semantics for computing N are rather annoying and
difficult to reproduce cleanly. They also lead to difficult to read
escape analysis results in tests.

This CL changes N to always be calculated as the parameter's index
within the function's result parameter tuple. E.g., if a function has
a single result, it will now always be named "~r0".

The normative change to this CL is fairly simple, but it requires
updating a lot of test expectations.

Change-Id: I58a3c94de00cb822cb94efe52d115531193c993c
Reviewed-on: https://go-review.googlesource.com/c/go/+/323010
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
3 years ago[dev.typeparams] cmd/compile: add morestack arg spilling code on ARM64
Cherry Mui [Tue, 25 May 2021 22:40:28 +0000 (18:40 -0400)]
[dev.typeparams] cmd/compile: add morestack arg spilling code on ARM64

Spill arg registers before calling morestack, and reload after.

Change-Id: I09404def321b8f935d5e8836a46ccae8256d0d55
Reviewed-on: https://go-review.googlesource.com/c/go/+/322853
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
3 years ago[dev.typeparams] cmd/internal/obj/arm64: use ABI-compatible registers in function...
Cherry Mui [Tue, 25 May 2021 22:08:36 +0000 (18:08 -0400)]
[dev.typeparams] cmd/internal/obj/arm64: use ABI-compatible registers in function prologue

Avoid using R1, R2, etc. in function prologue, which may carry
live argument values.

Change-Id: I80322b3f7e8fda7aaff622aaa99bc76d02e09727
Reviewed-on: https://go-review.googlesource.com/c/go/+/322852
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
3 years agoos: deflake TestFdReadRace
Ian Lance Taylor [Wed, 26 May 2021 22:17:27 +0000 (15:17 -0700)]
os: deflake TestFdReadRace

The test would hang if the call to Fd set the pipe to be non-blocking
before the Read entered the first read system call. Avoid that problem
by writing data to the pipe to wake up the read.

For #24481
Fixes #44818

Change-Id: I0b798874c7b81e7308a38ebbf657efc4392ffacd
Reviewed-on: https://go-review.googlesource.com/c/go/+/322893
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
3 years ago[dev.typeparams] cmd/compile: define ARM64 parameter registers
Cherry Mui [Tue, 25 May 2021 15:53:04 +0000 (11:53 -0400)]
[dev.typeparams] cmd/compile: define ARM64 parameter registers

Define the registers.

They are not really enabled for now. Otherwise the compiler will
start using them for go:registerparams functions and it is not
fully working. Some test will fail.

Now we can compile a simple Add function with registerparams
(with registers enabled).

Change-Id: Ifdfac931052c0196096a1dd8b0687b5fdedb14d5
Reviewed-on: https://go-review.googlesource.com/c/go/+/322850
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
3 years ago[dev.typeparams] cmd/compile: do not schedule in-register args late, even for block...
Cherry Mui [Tue, 25 May 2021 23:49:08 +0000 (19:49 -0400)]
[dev.typeparams] cmd/compile: do not schedule in-register args late, even for block control

In the scheduler we have the logic that if a Value is used as the
block's control, we schedule it at the end, except for Phis and
Args. Even the comment says so, the code doesn't exclude
in-register Args (OpArgXXXReg).

Change to check for score instead, which includes OpArgXXXRegs.
It also includes GetClosurePtr, which must be scheduled early.
We just happen to never use it as block control.

Found when working on ARM64 register ABI. In theory this could
apply to AMD64 as well. But on AMD64 we never use in-register
Value as block control, as conditional branch is always based on
FLAGS, never based on registers, so it doesn't actually cause any
problem.

Change-Id: I167a550309772639574f7468caf91bd805eb74c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/322849
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
3 years agosrc/os: revert accidentally submitted change
Damien Neil [Wed, 26 May 2021 22:44:46 +0000 (15:44 -0700)]
src/os: revert accidentally submitted change

Change-Id: Ib34984a6bd0abc76266e8aac96f9f8ad8ae21d17
Reviewed-on: https://go-review.googlesource.com/c/go/+/322894
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 years agodoc/go1.17: document net/... changes
Damien Neil [Wed, 26 May 2021 18:28:01 +0000 (11:28 -0700)]
doc/go1.17: document net/... changes

For #44513.
Fixes #46014.
Fixes #46015.
Fixes #46016.
Fixes #46017.

Change-Id: I356483d68d07159281dfe2ea1e49430ddf200973
Reviewed-on: https://go-review.googlesource.com/c/go/+/322891
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 years agodoc/go1.17: document syscall changes
Damien Neil [Wed, 26 May 2021 18:12:43 +0000 (11:12 -0700)]
doc/go1.17: document syscall changes

Fixes #46023

Change-Id: Ia63829d03afb0936862b16f0971175cbaa1095bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/322890
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 years agomime: document use of the Shared MIME-Info Database
Damien Neil [Wed, 26 May 2021 20:43:15 +0000 (13:43 -0700)]
mime: document use of the Shared MIME-Info Database

For #44513.
Fixes #46013.

Change-Id: I382603208aa94b66d5220cf0f418b8528a4e4148
Reviewed-on: https://go-review.googlesource.com/c/go/+/322892
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 years ago[dev.typeparams] cmd/compile: always generate (*T).M wrappers for instantiated methods
Dan Scales [Sun, 16 May 2021 21:48:05 +0000 (14:48 -0700)]
[dev.typeparams] cmd/compile: always generate (*T).M wrappers for instantiated methods

Always generate (*T).M wrappers for instantiated methods, even when the
instantiated method is being generated for another package (its source
package)

Added new function t.IsInstantiated() to check for fully-instantiated
types (generic type instantiated with concrete types, hence concrete
themselves). This function helps hide the representation of instantiated
types outside of the types package.

Added new export/import test setsimp.go that needs this change.

Change-Id: Ifb700db8c9494e1684c93735edb20f4709be5f7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/322193
Trust: Dan Scales <danscales@google.com>
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years ago[dev.typeparams] cmd/compile: get type aliases working with generic types
Dan Scales [Mon, 24 May 2021 21:15:48 +0000 (14:15 -0700)]
[dev.typeparams] cmd/compile:  get type aliases working with generic types

Generic types can the source type of a type alias, so modify g.typ0() to
be able to deal with base generic types.

Added test aliasimp.go that tests aliasing of local generic types and
imported generic types.

Change-Id: I1c398193819d47a36b014cc1f9bb55107e9a565b
Reviewed-on: https://go-review.googlesource.com/c/go/+/322194
Trust: Dan Scales <danscales@google.com>
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years ago[dev.typeparams] cmd/compile: avoid some redundant type construction
Matthew Dempsky [Tue, 18 May 2021 08:20:13 +0000 (01:20 -0700)]
[dev.typeparams] cmd/compile: avoid some redundant type construction

This CL updates noder and typecheck to avoid a couple of instances of
redundant evaluation of type expressions:

1. When noding struct fields or parameter tuples, check for
syntax.Type reuse between adjacent fields and then reuse the
corresponding ir.Node type expression. It would perhaps be even better
to avoid re-noding the type expression too, but noder's days are
numbered anyway, so I'd rather be minimally invasive here.

2. When importing an empty interface, reuse the same cached empty
interface instance that is used for empty interfaces that appear in
source. This matches types2's behavior, which uses a single
types2.Interface instance for all empty interfaces.

These changes are motivated by making it possible to migrate from
typecheck to types2 while passing toolstash -cmp.

Updates #46208.

Change-Id: Ia6458894494464d863181db356f3284630c90ffe
Reviewed-on: https://go-review.googlesource.com/c/go/+/320789
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Trust: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years agodoc/go1.17: add release notes for runtime/metrics package
Cherry Mui [Wed, 26 May 2021 16:18:32 +0000 (12:18 -0400)]
doc/go1.17: add release notes for runtime/metrics package

Updates #44513.

Change-Id: I571a791e9c76371be3b3f1a323f1ea8ff485cf0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/322857
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
3 years agodoc/go1.17: mention enabling frame pointer on all ARM64
Cherry Mui [Wed, 19 May 2021 20:34:58 +0000 (16:34 -0400)]
doc/go1.17: mention enabling frame pointer on all ARM64

Updates #44513.

Change-Id: I43e95de0423779b3311d96c56f7c8c1cc5be27b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/321311
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
3 years agogo/types: ensure that Named.check is nilled out once it is expanded
Rob Findley [Fri, 7 May 2021 02:28:37 +0000 (22:28 -0400)]
go/types: ensure that Named.check is nilled out once it is expanded

To support lazy expansion of defined types, *Named holds on to a
*Checker field, which can pin the *Checker in memory. This can have
meaningful memory implications for applications that keep type
information around.

Ensure that the Checker field is nilled out for any Named types that are
instantiated during the type checking pass, by deferring a clean up to
'later' boundaries.

In testing this almost exactly offset the ~6% memory footprint increase
I observed with 1.17.

Fixes #45580

Change-Id: I8aa5bb777573a924afe36e79fa65f8729336bceb
Reviewed-on: https://go-review.googlesource.com/c/go/+/318849
Trust: Robert Findley <rfindley@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years agoruntime,cmd/link/internal/ld: fix typos
tyltr [Wed, 26 May 2021 15:41:27 +0000 (15:41 +0000)]
runtime,cmd/link/internal/ld: fix typos

Change-Id: I558590cef7e2311aadbdcb4088033e350d3aae32
GitHub-Last-Rev: 513944a6238e0e32e2a2c266b70f7d50c9db508d
GitHub-Pull-Request: golang/go#46389
Reviewed-on: https://go-review.googlesource.com/c/go/+/322809
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 years ago[dev.typeparams] cmd/compile: adding union support in types1
Dan Scales [Tue, 25 May 2021 03:36:42 +0000 (20:36 -0700)]
[dev.typeparams] cmd/compile: adding union support in types1

Add union support in types1, and allow exporting of unions, and
importing unions back into types1 and types2.

Added new test mincheck.go/mincheck.dir that tests that type lists (type
sets) are correctly exported/imported, so that types2 gives correct
errors that an instantiation doesn't fit the type list in the type param
constraint.

Change-Id: I8041c6c79289c870a95ed5a1b10e4c1c16985b12
Reviewed-on: https://go-review.googlesource.com/c/go/+/322609
Trust: Dan Scales <danscales@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
3 years agomath/big: move division into natdiv.go
Russ Cox [Thu, 13 May 2021 03:04:25 +0000 (23:04 -0400)]
math/big: move division into natdiv.go

Code moved and functions reordered to be in a consistent
top-down dependency order, but otherwise unchanged.

First step toward commenting division algorithms.

Change-Id: Ib5e604fb5b2867edff3a228ba4e57b5cb32c4137
Reviewed-on: https://go-review.googlesource.com/c/go/+/321077
Trust: Russ Cox <rsc@golang.org>
Trust: Katie Hockman <katie@golang.org>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>