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Commit Graph

46980 Commits

Author SHA1 Message Date
Rodolfo Carvalho
2217e89ba3 net/http/httptrace: fix doc typo
Change-Id: I919d9c3968c0fcd33774e714f22182504790bd01
Reviewed-on: https://go-review.googlesource.com/c/go/+/284143
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Trust: Daniel Martí <mvdan@mvdan.cc>
2021-03-05 09:24:34 +00:00
Meng Zhuo
31df4e3fcd cmd/link: add relocs type for mips64x
The race detector of llvm adds four reloc types even with -fPIC

elf.R_MIPS_CALL16
elf.R_MIPS_GPREL32
elf.R_MIPS_64
elf.R_MIPS_GOT_DISP

Change-Id: If73119dcba14ef74395273eb680f52a0aa853217
Reviewed-on: https://go-review.googlesource.com/c/go/+/270297
Trust: Meng Zhuo <mzh@golangcn.org>
Run-TryBot: Meng Zhuo <mzh@golangcn.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-03-05 06:18:33 +00:00
Josh Bleecher Snyder
60b500dc6c math/big: remove bounds checks for shrVU_g inner loop
Make explicit a shrVU_g precondition.
Replace i with i+1 throughout the loop.
The resulting loop is functionally identical,
but the compiler can do better BCE without the i-1 slice offset.

Benchmarks results on amd64 with -tags=math_big_pure_go.

name                          old time/op  new time/op  delta
NonZeroShifts/1/shrVU-8       4.55ns ± 2%  4.45ns ± 3%   -2.27%  (p=0.000 n=28+30)
NonZeroShifts/1/shlVU-8       4.07ns ± 1%  4.13ns ± 4%   +1.55%  (p=0.000 n=26+29)
NonZeroShifts/2/shrVU-8       6.12ns ± 1%  5.55ns ± 1%   -9.30%  (p=0.000 n=28+28)
NonZeroShifts/2/shlVU-8       5.65ns ± 3%  5.70ns ± 2%   +0.92%  (p=0.008 n=30+29)
NonZeroShifts/3/shrVU-8       7.58ns ± 2%  6.79ns ± 2%  -10.46%  (p=0.000 n=28+28)
NonZeroShifts/3/shlVU-8       6.62ns ± 2%  6.69ns ± 1%   +1.07%  (p=0.000 n=29+28)
NonZeroShifts/4/shrVU-8       9.02ns ± 1%  7.79ns ± 2%  -13.59%  (p=0.000 n=27+30)
NonZeroShifts/4/shlVU-8       7.74ns ± 1%  7.82ns ± 1%   +0.92%  (p=0.000 n=26+28)
NonZeroShifts/5/shrVU-8       10.6ns ± 1%   8.9ns ± 3%  -16.31%  (p=0.000 n=25+29)
NonZeroShifts/5/shlVU-8       8.59ns ± 1%  8.68ns ± 1%   +1.13%  (p=0.000 n=27+29)
NonZeroShifts/10/shrVU-8      18.2ns ± 2%  14.4ns ± 1%  -20.96%  (p=0.000 n=27+28)
NonZeroShifts/10/shlVU-8      14.1ns ± 1%  14.1ns ± 1%   +0.46%  (p=0.001 n=26+28)
NonZeroShifts/100/shrVU-8      161ns ± 2%   118ns ± 1%  -26.83%  (p=0.000 n=29+30)
NonZeroShifts/100/shlVU-8      119ns ± 2%   120ns ± 2%   +0.92%  (p=0.000 n=29+29)
NonZeroShifts/1000/shrVU-8    1.54µs ± 1%  1.10µs ± 1%  -28.63%  (p=0.000 n=29+29)
NonZeroShifts/1000/shlVU-8    1.10µs ± 1%  1.10µs ± 2%     ~     (p=0.701 n=28+29)
NonZeroShifts/10000/shrVU-8   15.3µs ± 2%  10.9µs ± 1%  -28.68%  (p=0.000 n=28+28)
NonZeroShifts/10000/shlVU-8   10.9µs ± 2%  10.9µs ± 2%   -0.57%  (p=0.003 n=26+29)
NonZeroShifts/100000/shrVU-8   154µs ± 1%   111µs ± 2%  -28.04%  (p=0.000 n=27+28)
NonZeroShifts/100000/shlVU-8   113µs ± 2%   113µs ± 2%     ~     (p=0.790 n=30+30)

Change-Id: Ib6a621ee7c88b27f0f18121fb2cba3606c40c9b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/297049
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-03-05 06:15:22 +00:00
Tao Qingyun
f0b6d3753f cmd/go: update PWD variable for 'go generate'
Most subprocess invocations in the go command use base.AppendPWD to
append an accurate value of PWD to the command's environment, which can
speed up calls like os.Getwd and also help to provide less-confusing
output from scripts. Update `go generate` to do so.

Fixes #43862

Change-Id: I3b756f1532b2d922f7d74fd86414d5567a0122c0
GitHub-Last-Rev: 3ec8da265a
GitHub-Pull-Request: golang/go#43940
Reviewed-on: https://go-review.googlesource.com/c/go/+/287152
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Baokun Lee <bk@golangcn.org>
2021-03-05 04:30:32 +00:00
John Bampton
2b0e29f516 docs: fix case of GitHub
Change `Github` to `GitHub`

Change-Id: I514e8dc9a19182fcf9fcf5bc1b5fbff253c1a947
GitHub-Last-Rev: 7124c7058e
GitHub-Pull-Request: golang/go#44260
Reviewed-on: https://go-review.googlesource.com/c/go/+/291950
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-03-05 02:35:21 +00:00
Bryan C. Mills
b62da08909 cmd/go: update error expectations in TestScript/mod_install_pkg_version
This test was missed in CL 298650, and not caught by TryBots because
it is skipped it short mode (and we forgot to add longtest TryBots on
that CL).

Updates #44745

Change-Id: I696d01307dabf351b0e4735db0644f4e09c8e369
Reviewed-on: https://go-review.googlesource.com/c/go/+/298794
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-03-05 02:30:31 +00:00
Meng Zhuo
a7526bbf72 encoding/json: marshal maps using reflect.Value.MapRange
Map serialization using reflect.Value.MapIndex cannot retrieve
map keys that contain a NaN, resulting in a panic.
Switch the implementation to use the reflect.Value.MapRange method
instead, which iterates over all map entries regardless of whether
they are directly retrievable.

Note that according to RFC 8259, section 4, a JSON object should
have unique names, but does not forbid the occurrence of duplicate names.

Fixes #43207

Change-Id: If4bc55229b1f64b8ca4b0fed37549725efdace39
Reviewed-on: https://go-review.googlesource.com/c/go/+/278632
Trust: Meng Zhuo <mzh@golangcn.org>
Trust: Joe Tsai <thebrokentoaster@gmail.com>
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Meng Zhuo <mzh@golangcn.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
2021-03-05 02:28:11 +00:00
Dan Scales
96a96a9058 cmd/compile: remove types2.(*Selection).TArgs(), now that instance bug seems fixed
Previously, we would sometimes see an internal (*instance) type for a
receiver of a types2 method, which was a bug. To deal with that, we put
in an extra (*Selection).TArgs() method. However, that (*instance) type
is no longer showing up for receivers, so we can remove the types2
method we added and do the work with existing types2 API methods.

Change-Id: I03e68f5bbaaf82fe706b6efecbb02e951bbd3cd4
Reviewed-on: https://go-review.googlesource.com/c/go/+/298869
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>
2021-03-04 23:37:01 +00:00
David Chase
d891ebdce1 cmd/compile: return (and receive) medium-large results
includes three tests

Change-Id: I33ac0cfe35085d4b6ad2775abcaa3d7d6527b49f
Reviewed-on: https://go-review.googlesource.com/c/go/+/297031
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 23:09:24 +00:00
David Chase
d6504b8097 cmd/compile: tweak offset-generator to elide more +0 offsets
this caused a problem in write barrier code when a spurious
zero-offset prevented a write barrier elision.

removed cache after instrumenting it and discovering
zero safe hits (one value must dominate the other, else
unsafe).

Change-Id: I42dfdb4d38ebfe158b13e766a7fabfc514d773f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/297349
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 23:08:32 +00:00
David Chase
5c5552c5ba cmd/compile: add register abi tests
Change-Id: I4b2b62a8eb1c4bf47f552214127d4ed5710af196
Reviewed-on: https://go-review.googlesource.com/c/go/+/297030
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 23:07:50 +00:00
Jay Conrod
56d52e6611 cmd/go: don't report missing std import errors for tidy and vendor
'go mod tidy' and 'go mod vendor' normally report errors when a
package can't be imported, even if the import appears in a file that
wouldn't be compiled by the current version of Go. These errors are
common for packages introduced in higher versions of Go, like "embed"
in 1.16.

This change causes 'go mod tidy' and 'go mod vendor' to ignore
missing package errors if the import path appears to come from the
standard library because it lacks a dot in the first path element.

Fixes #44557
Updates #27063

Change-Id: I61d6443e77ab95fd8c0d1514f57ef4c8885a77cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/298749
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-03-04 22:53:05 +00:00
Jay Conrod
b87e9b9f68 cmd/go: clarify errors for commands run outside a module
The new error message tells the user what was wrong (no go.mod found)
and directs them to 'go help modules', which links to tutorials.

Fixes #44745

Change-Id: I98f31fec4a8757eb1792b45491519da4c552cb0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/298650
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>
2021-03-04 22:41:34 +00:00
Robert Griesemer
a99ff24a26 cmd/compile/internal/syntax: print type parameters and type lists
types2 uses the syntax printer to print expressions (for tracing
or error messages), so we need to (at least) print type lists in
interfaces.

While at it, also implement the printing of type parameter lists.

Fixes #44766.

Change-Id: I36a4a7152d9bef7251af264b5c7890aca88d8dc3
Reviewed-on: https://go-review.googlesource.com/c/go/+/298549
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-03-04 22:20:29 +00:00
David Chase
9d3718e834 cmd/compile: remove I-saw-a-register-pragma chatter
It is not multithreaded-compilation-safe, and also seems
to cause problems on the noopt-builder.

Change-Id: I52dbcd507d256990f1ec7c8040ec7b76595aae4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/298850
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 21:47:26 +00:00
David Chase
c015f76acb cmd/compile: implement too-big-to-SSA struct passing in registers
Added a test that exercises named results

Change-Id: Ie228b68f4f846266595a95e0f65a6e4b8bf79635
Reviewed-on: https://go-review.googlesource.com/c/go/+/297029
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 20:18:16 +00:00
Jason A. Donenfeld
77505c25d8 syscall: treat proc thread attribute lists as unsafe.Pointers
It turns out that the proc thread update function doesn't actually
allocate new memory for its arguments and instead just copies the
pointer values into the preallocated memory. Since we were allocating
that memory as []byte, the garbage collector didn't scan it for pointers
to Go allocations and freed them. We _could_ fix this by requiring that
all users of this use runtime.KeepAlive for everything they pass to the
update function, but that seems harder than necessary. Instead, we can
just do the allocation as []unsafe.Pointer, which means the GC can
operate as intended and not free these from beneath our feet. In order
to ensure this remains true, we also add a test for this.

Fixes #44662.

Change-Id: Ib392ba8ceacacec94b11379919c8179841cba29f
Reviewed-on: https://go-review.googlesource.com/c/go/+/297389
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-03-04 19:59:23 +00:00
David Chase
9d88a9e2bf cmd/compile: implement simple register results
at least for ints and strings

includes simple test

For #40724.

Change-Id: Ib8484e5b957b08f961574a67cfd93d3d26551558
Reviewed-on: https://go-review.googlesource.com/c/go/+/295309
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 19:45:11 +00:00
Paul E. Murphy
2d30c94874 cmd/internal: Add 6 args to ppc64 optab
This is a preparatory patch to support 6 arg opcodes on POWER10,
and simplify 5 arg opcode processing (e.g RLWNM and similar).

This expands the optab structure, and renames a4 arguments to a6.
No actual change in functionality is made.

Change-Id: I785e4177778e4bf1326cf8e46e8aeaaa0e4d406b
Reviewed-on: https://go-review.googlesource.com/c/go/+/295031
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Carlos Eduardo Seo <carlos.seo@linaro.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Keith Randall <khr@golang.org>
2021-03-04 17:55:25 +00:00
Bryan C. Mills
cfb609bfb7 cmd/go: ensure that the test subprocess always times out in TestScript/test_write_profiles_on_timeout
This test verifies the behavior of a test that fails due to timing
out. However, the test to be timed out was only sleeping for 1s before
returning successfully. That is empirically not always long enough for
the test process itself to detect the timeout and terminate.

We could replace the sleep with a select{}, but that would assume that
the deadlock detector does not terminate a test that reaches that
state (true today, but not necessarily so).

We could replace the arbitrarily sleep with an arbitrarily longer
sleep, but that's, well, arbitrary.

Instead, have the test sleep in an unbounded loop to ensure that it
always continues to run until the timeout is detected, and check the
test output to ensure that it actually reached the timeout path.

Fixes #32983

Change-Id: Ie7f210b36ef0cc0a4db473f780e15a3d6def8bda
Reviewed-on: https://go-review.googlesource.com/c/go/+/289889
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>
2021-03-04 17:47:28 +00:00
LeonardWang
9c54f878d2 runtime: remove GODEBUG=scavenge mode
Change-Id: Ic4c7b5086303c7faa49f4cbf6738e66d5de35c7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/282012
Trust: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2021-03-04 17:27:32 +00:00
Bryan C. Mills
9a40dee3ee cmd/go: reject 'go list -m MOD@patch' when no existing version of MOD is required
Noticed while debugging failing tests for #36460.

Fixes #44788

Change-Id: Ic2cf511d871b29284f7372920f6f7d452825dd63
Reviewed-on: https://go-review.googlesource.com/c/go/+/298651
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-03-04 16:33:06 +00:00
Tao Qingyun
a416efef5a runtime: remove a duplicated testcase of TestPallocDataFindScavengeCa…
Change-Id: Ib44729ffb5d4d7b84114dcf028b7e0418c9d5035
GitHub-Last-Rev: 13f59a650a
GitHub-Pull-Request: golang/go#42434
Reviewed-on: https://go-review.googlesource.com/c/go/+/268021
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
Trust: Martin Möhrmann <moehrmann@google.com>
2021-03-04 16:31:19 +00:00
David Chase
3778f8e07d cmd/compile: fix pointer maps for morestack
Verified with test and with single step watching changes to register
values across morestack calls, after reload.

Also added stack-growth test with pointer parameters of varying lifetime.

For #40724.

Change-Id: Idb5fe27786ac5c6665a734d41e68d3d39de2f4da
Reviewed-on: https://go-review.googlesource.com/c/go/+/294429
Trust: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-03-04 16:21:10 +00:00
David Chase
a2d92b5143 cmd/compile: register abi, morestack work and mole whacking
Morestack works for non-pointer register parameters

Within a function body, pointer-typed parameters are correctly
tracked.

Results still not hooked up.

For #40724.

Change-Id: Icaee0b51d0da54af983662d945d939b756088746
Reviewed-on: https://go-review.googlesource.com/c/go/+/294410
Trust: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 16:19:12 +00:00
Cuong Manh Le
868a110c56 cmd/compile: make check2 gracefully exit if it reported errors
Otherwise, if -d=panic was set, check2 will treat already reported
error as internal compiler error.

For #43311
Fixes #44445

Change-Id: I5dbe06334666df21d9107396b9dcfdd905aa1e44
Reviewed-on: https://go-review.googlesource.com/c/go/+/294850
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>
2021-03-04 06:36:33 +00:00
Cuong Manh Le
1d0256a989 cmd/compile: do not add invalid key to constSet
After CL 272654, the compiler now use go/constant.Value to represent
constant nodes. That makes ir.ConstantValue requires node type to
correctly return value for untyped int node. But untyped int node can
have nil type after typechecked, e.g: using int value as key for
map[string]int, that makes the compiler crashes.

To fix it, just don't add the invalid key to constSet, since when
it's not important to report duplicated keys when they aren't valid.

For #43311
Fixes #44432

Change-Id: I44d8f2b95f5cb339e77e8a705a94bcb16e62beb9
Reviewed-on: https://go-review.googlesource.com/c/go/+/294034
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>
2021-03-04 06:36:26 +00:00
Cuong Manh Le
4b8b2c5864 cmd/compile: do not set type for OTYPE
That's an invalid operation and depend on gc.hidePanic to report error.

Updates #43311

Change-Id: Ib0761dcf4d9d2a23c41de7eff0376677a90b942e
Reviewed-on: https://go-review.googlesource.com/c/go/+/294033
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>
2021-03-04 06:36:17 +00:00
Cuong Manh Le
8c22874e4e cmd/compile: skip diag error in checkassign if one was emitted
While at it, also remove checkassignlist, which is not used.

For #43311

Change-Id: Ie7ed81f68080d8881fca6035da64a9755f2cb555
Reviewed-on: https://go-review.googlesource.com/c/go/+/294032
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>
2021-03-04 06:36:07 +00:00
Cuong Manh Le
12a405b96a cmd/compile: do not set type for OPACK
That's an invalid operation and depend on gc.hidePanic to report error.

Updates #43311

Change-Id: I78d615c40ab1e7887f612491e215c1c2bb758ef6
Reviewed-on: https://go-review.googlesource.com/c/go/+/294031
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>
2021-03-04 06:35:58 +00:00
Cuong Manh Le
b7f4307761 cmd/compile: graceful handle error in noder LoadPackage
When syntax.Parse returns error, noder.file will be nil. Currently, we
continue accessing it regardlessly and depend on gc.hidePanic to hide
the panic from user.

Instead, we should gracefully handle the error in LoadPackage, then exit
earlier if any error occurred.

Updates #43311

Change-Id: I0a108ef360bd4f0cc9f481071b8967355e1513af
Reviewed-on: https://go-review.googlesource.com/c/go/+/294030
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>
2021-03-04 06:35:44 +00:00
David Chase
4532467c18 cmd/compile: pass register parameters to called function
still needs morestack
still needs results
lots of corner cases also not dealt with.

For #40724.

Change-Id: I03abdf1e8363d75c52969560b427e488a48cd37a
Reviewed-on: https://go-review.googlesource.com/c/go/+/293889
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-03-04 03:30:55 +00:00
David Chase
95ff296a11 cmd/compile: pass arguments as register parameters to StaticCall.
Additional register-parameter plumbing, not all the way to the end;
if you test register parameter-passing, it fails mid-compilation.

For #40724.

Change-Id: Ibb675022c9156779a451726329890e52fca1cb33
Reviewed-on: https://go-review.googlesource.com/c/go/+/293398
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-03-04 03:29:58 +00:00
David Chase
04a4dca2ac cmd/compile: refactor out an almost-superfluous arg
Moved all "target" information into "storeRC"; it was a register
cursor, now it is a register cursor that also carries the store
target with it if there are no registers.  Also allows booby-trapping
to ensure that the target is unambiguously one or the other.

For #40724.

Change-Id: I53ba4b91679e5fcc89c63b7d31225135299c6ec6
Reviewed-on: https://go-review.googlesource.com/c/go/+/293397
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 02:09:42 +00:00
eric fang
775f11cda1 cmd/internal/obj/arm64: remove unncessary class check in addpool
The argument class check in addpool is unnecessary, remove it so that we don't
need to list all the compatiable classes.

Change-Id: I36f6594db35e25db22fe898273e024c2db4cb771
Reviewed-on: https://go-review.googlesource.com/c/go/+/283492
Trust: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 01:37:43 +00:00
eric fang
27dbc4551a cmd/asm: disable scaled register format for arm64
Arm64 doesn't have scaled register format, such as (R1*2), (R1)(R2*3),
but currently the assembler doesn't report an error for such kind of
instruction operand format. This CL disables the scaled register
operand format for arm64 and reports an error if this kind of instruction
format is seen.
With this CL, the assembler won't print (R1)(R2) as (R1)(R2*1), so that
we can make the assembly test simpler.

Change-Id: I6d7569065597215be4c767032a63648d2ad16fed
Reviewed-on: https://go-review.googlesource.com/c/go/+/289589
Trust: eric fang <eric.fang@arm.com>
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Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 01:31:21 +00:00
eric fang
593f5bbad7 cmd/compile: adjust stack slot alignment requirements on arm64
Currently any variable that is spilled onto the stack will occupy at least 8 bytes,
because the stack offset is required to be aligned with 8 bytes on linux/arm64.
This CL removes this constraint by aligning the stack slot with its actual size.

Updates #42385

Change-Id: Icbd63dc70cd19852802e43f134355f19ba7e1e29
Reviewed-on: https://go-review.googlesource.com/c/go/+/267999
Trust: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 01:30:59 +00:00
eric fang
355c3a037e cmd/internal/obj/asm64: add support for moving BITCON to RSP
Constant of BITCON type can be moved into RSP by MOVD or MOVW instructions
directly, this CL enables this format of these two instructions.

For 32-bit ADDWop instructions with constant, rewrite the high 32-bit
to be a repetition of the low 32-bit, just as ANDWop instructions do,
so that we can optimize ADDW $bitcon, Rn, Rt as:
MOVW $bitcon, Rtmp
ADDW Rtmp, Rn, Rt
The original code is:
MOVZ $bitcon_low, Rtmp
MOVK $bitcon_high,Rtmp
ADDW Rtmp, Rn, Rt

Change-Id: I30e71972bcfd6470a8b6e6ffbacaee79d523805a
Reviewed-on: https://go-review.googlesource.com/c/go/+/289649
Trust: eric fang <eric.fang@arm.com>
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TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 01:28:21 +00:00
eric fang
726d704c32 cmd/asm: add arm64 instructions VUMAX and VUMIN
This CL adds support for arm64 fp&simd instructions VUMAX and VUMIN.
Fixes #42326

Change-Id: I3757ba165dc31ce1ce70f3b06a9e5b94c14d2ab9
Reviewed-on: https://go-review.googlesource.com/c/go/+/271497
Trust: eric fang <eric.fang@arm.com>
Run-TryBot: eric fang <eric.fang@arm.com>
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Reviewed-by: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 01:26:52 +00:00
eric fang
79beddc773 cmd/asm: add 128-bit FLDPQ and FSTPQ instructions for arm64
This CL adds assembly support for 128-bit FLDPQ and FSTPQ instructions.

This CL also deletes some wrong pre/post-indexed LDP and STP instructions,
such as {ALDP, C_UAUTO4K, C_NONE, C_NONE, C_PAIR, 74, 8, REGSP, 0, C_XPRE},
because when the offset type is C_UAUTO4K, pre and post don't work.

Change-Id: Ifd901d4440eb06eb9e86c9dd17518749fdf32848
Reviewed-on: https://go-review.googlesource.com/c/go/+/273668
Trust: eric fang <eric.fang@arm.com>
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Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-04 01:26:21 +00:00
Rob Findley
12bb256cb3 go/types: use correct recv for parameterized embedded methods
This is a direct port of CL 298129 to go/types.

Fixes #44688

Change-Id: I950992ea7beea5b9c8bea0c296b5ce03b2aa9b12
Reviewed-on: https://go-review.googlesource.com/c/go/+/298349
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>
2021-03-04 00:56:00 +00:00
Robert Griesemer
6db80d7420 cmd/compile/internal/types2: use correct recv for parameterized embedded methods
Methods of generic types are instantiated lazily (upon use). Thus,
when we encounter a method of such a type, we need to instantiate
the method signature with the receiver type arguments. We infer
those type arguments from the method receiver. If the method is
embedded, we must use the actual embedded receiver type, otherwise
the receiver type declared with the method doesn't match up and
inference will fail.

(Note that there's no type inference in the source code here, it's
only the implementation which uses the existing inference mechanism
to easily identify the actual type arguments. If the implementation
is correct, the inference will always succeed.)

Updates #44688.

Change-Id: Ie35b62bebaeaf42037f2ca00cf8bd34fec2ddd9c
Reviewed-on: https://go-review.googlesource.com/c/go/+/298129
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-03-03 20:01:55 +00:00
David Chase
d6f6ef6358 cmd/compile: remove races introduced in abiutils field update
This fix uses mutex around the problematic store and subsequent access;
if this causes performance problems later a better fix is to do all the
ABI binding in gc/walk where it is single-threaded.

Change-Id: I488f28ab75beb8351c856fd50b0095cab463642e
Reviewed-on: https://go-review.googlesource.com/c/go/+/298109
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2021-03-03 17:59:50 +00:00
David Chase
3e524ee65a cmd/compile: make modified Aux type for OpArgXXXX pass ssa/check
For #40724.

Change-Id: I7d1e76139d187cd15a6e0df9d19542b7200589f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/297911
Trust: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-03 15:01:05 +00:00
David Chase
9f33dc3ca1 cmd/compile: handle aggregate OpArg in registers
Also handles case where OpArg does not escape but has its address
taken.

May have exposed a lurking bug in 1.16 expandCalls,
if e.g., loading len(someArrayOfstructThing[0].secondStringField)
from a local.  Maybe.

For #40724.

Change-Id: I0298c4ad5d652b5e3d7ed6a62095d59e2d8819c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/293396
Trust: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-03 15:00:48 +00:00
eric fang
c4e3f6c4c7 cmd/compile: remove 8-byte alignment requirement of stack slot on s390x
This CL applies CL 267999 to s390x.

Updates #42385

Change-Id: Ie8e69ad1b3f7ddc2c8f05125f4af617aeac035ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/297769
Reviewed-by: Keith Randall <khr@golang.org>
Trust: eric fang <eric.fang@arm.com>
2021-03-03 06:57:05 +00:00
eric fang
85f62b0941 cmd/compile: remove 8-byte alignment requirement of stack slot on mips
This CL applies CL 267999 to mips.

Updates #42385

Change-Id: I8096e16c1b4def767b0c20c16add36fa2406bcab
Reviewed-on: https://go-review.googlesource.com/c/go/+/297772
Reviewed-by: Keith Randall <khr@golang.org>
Trust: eric fang <eric.fang@arm.com>
2021-03-03 06:52:41 +00:00
Joel Sing
497feff168 cmd/compile: intrinsify runtime/internal/atomic.{And,Or}{8,} on RISCV64
The 32 bit versions are easily implement with a single instruction, while the
8 bit versions require a bit more effort but use the same atomic instructions
via rewrite rules.

Change-Id: I42e8d457b239c8f75e39a8e282fc88c1bb292a99
Reviewed-on: https://go-review.googlesource.com/c/go/+/268098
Trust: Joel Sing <joel@sing.id.au>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-03 05:35:24 +00:00
Joel Sing
00cb841b83 syscall: implement rawVforkSyscall for remaining linux platforms
This allows the use of CLONE_VFORK and CLONE_VM for fork/exec, preventing
'fork/exec ...: cannot allocate memory' failures from occuring when attempting
to execute commands from a Go process that has a large memory footprint.
Additionally, this should reduce the latency of fork/exec on these platforms.

Fixes #31936

Change-Id: I4e28cf0763173145cacaa5340680dca9ff449305
Reviewed-on: https://go-review.googlesource.com/c/go/+/295849
Trust: Joel Sing <joel@sing.id.au>
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2021-03-03 05:33:21 +00:00
David Chase
f2df1e3c34 cmd/compile: retrieve Args from registers
in progress; doesn't fully work until they are also passed on
register on the caller side.

For #40724.

Change-Id: I29a6680e60bdbe9d132782530214f2a2b51fb8f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/293394
Trust: David Chase <drchase@google.com>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-03-03 03:02:39 +00:00