Ian Lance Taylor [Fri, 4 Mar 2022 02:21:37 +0000 (18:21 -0800)]
go/build: recognize "unix" build tag
The new "unix" build tag matches any Unix or Unix-like system.
This is only recognized on go:build lines, not in file names.
For #20322
Fixes #51572
Change-Id: I3a991f9e69353b25e259bc6462709cdcd83640fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/389934
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Rob Pike <r@golang.org>
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Ian Lance Taylor [Fri, 18 Mar 2022 19:14:20 +0000 (12:14 -0700)]
bytes: restore old Trim/TrimLeft behavior for nil
Keep returning nil for the cases where we historically returned nil,
even though this is slightly different for TrimLeft and TrimRight.
Fixes #51793
Change-Id: Ifbdfc6b09d52b8e063cfe6341019f9b2eb8b70e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/393876
Trust: Ian Lance Taylor <iant@golang.org>
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Matthew Dempsky [Wed, 23 Mar 2022 19:10:02 +0000 (12:10 -0700)]
internal/pkgbits: add fingerprints to unified IR export format
So far unified IR has been relying on the backwards-compat iexport
data to supply package fingerprints for imports. To be able to drop
the iexport data and natively use unified IR everywhere.
This CL applies basically the same idea that iexport used: simply
hash all of the export data as it's being written out, and then tack
on an 8-byte hash at the end.
Change-Id: Iaca5fbfd7443088bc7f422a1c58be3e762c29014
Reviewed-on: https://go-review.googlesource.com/c/go/+/396196
Trust: Matthew Dempsky <mdempsky@google.com>
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Cherry Mui [Mon, 28 Mar 2022 16:46:46 +0000 (12:46 -0400)]
cmd/internal/obj: sort relocations
At least on some platforms (e.g. PE dynamic loader) relocations
need to be sorted in address order. Currently we don't always emit
relocations in address order: e.g. for array literal with out-of-
order element initializers, or out-of-order DATA instructions in
assembly code. Sort them.
No test for now as I can't reproduce the failure for #51923.
Fixes #51923.
Change-Id: Ifec5d3476e027bb927bcefd6e45c40ebeccee4ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/396195
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Paul E. Murphy [Fri, 25 Mar 2022 15:29:27 +0000 (10:29 -0500)]
cmd/compile: make F0,F27-F31 allocatable on PPC64
These FP registers on PPC64 have no restrictions, they can
be used like the others. F27-F31 were sequested long ago for
scratch storage which has long since been reverted, but they
weren't added back to the allocator pool.
Change-Id: I9074660e2fc91a2044c9768f700a8215802cba51
Reviewed-on: https://go-review.googlesource.com/c/go/+/395834
Run-TryBot: Paul Murphy <murp@ibm.com>
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Kir Kolyshkin [Thu, 2 Dec 2021 03:48:58 +0000 (19:48 -0800)]
syscall: optimize Byte{Ptr,Slice}FromString
Use bytealg.IndexByteString(str, 0) instead of looping through the
string to check for a zero byte. A quick and dirty benchmark shows 10x
performance improvement (on amd64 machine, using go 1.17.3).
BytePtrFromString is used by many functions with string arguments.
This change should make many functions in os package, such as those
accepting a filename (os.Open, os.Stat, etc.), a tad faster.
PS I am aware that syscall package is deprecated and frozen, but this
change is mainly for the os package and the likes. The alternative
would be for os to switch to x/sys, which is a much bigger change.
Dmitry Vyukov [Mon, 21 Feb 2022 08:52:14 +0000 (09:52 +0100)]
runtime/race: update runtime (v3)
New tsan runtime (v3) built on llvm commit 1784fe0532a6.
The new runtime features:
- 2x smaller shadow memory (2x of app memory)
- faster fully vectorized (on x86) race detection
- small fixed-size vector clocks (512b)
- fast vectorized vector clock operations
- unlimited number of alive threads/goroutines
Patrick Gundlach [Mon, 19 Apr 2021 10:51:04 +0000 (12:51 +0200)]
encoding/xml: expose decoder line and column
The existing implementation of the xml decoder uses the line number
only for reporting syntax errors. The line number of the last read
token and the column within the line is useful for the users even
in non-error conditions.
Fixes #45628
Change-Id: I37b5033ff5ff8411793d8f5180f96aa4537e83f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/311270
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Keith Randall [Sat, 26 Mar 2022 19:21:36 +0000 (12:21 -0700)]
test: fix inline test on noopt builder
CL 394074 broke the noopt builder. Something about time.After's inlining
depends on the build flags to make.bash, not the build flags that run.go
passes.
Change-Id: Ib284c66ea2008a4d32829c055d57c54a34ec3fb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/396037
Trust: Keith Randall <khr@golang.org>
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Keith Randall [Fri, 11 Feb 2022 20:58:37 +0000 (12:58 -0800)]
cmd/compile: use method expression closures to implement bound method calls
When we have x.M(args) where x is a value of type parameter type, we
currently cast x to the bound of that type parameter (which is an interface)
and then invoke the method on that interface. That's pretty inefficient
because:
1) We need to convert x to an interface, which often requires allocation.
With CL 378178 it is at least stack allocation, but allocation nontheless.
2) We need to call through wrapper functions to unpack the interface
into the right argument locations for the callee.
Instead, let's just call the target directly. The previous CL to this one
added method expression closures to the dictionary, which is a simple
captureless closure that implements T.M for type parameter T and method M.
So to implement x.M(args) for x of type T, we use methodexpr(T,M)(x, args).
We just need to move x from the receiver slot to the first argument, and
use the dictionary entry to implement the polymorphism. This works because
we stencil by shape, so we know how to marshal x for the call even though
we don't know its exact type.
We should be able to revert CL 378178 after this one, as that optimization
will no longer be necssary as we're not converting values to interfaces
to implement this language construct anymore.
Update #50182
Change-Id: I813de4510e41ab63626e58bd1167f9ae93016202
Reviewed-on: https://go-review.googlesource.com/c/go/+/385274
Trust: Keith Randall <khr@golang.org>
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Keith Randall [Fri, 11 Feb 2022 00:40:18 +0000 (16:40 -0800)]
cmd/compile: implement generic method expressions with closures in dictionary
Currently we do quite a dance for method expressions on generic
types. We write a new closure, and in that closure convert the
receiver to an interface with the required method, then call the
target using an interface call.
Instead in this CL, we just allocate a (captureless) closure in the
dictionary which implements that method expression.
This CL makes method expressions faster and simpler. But the real win
is some followon CLs, where we can use the same closure to implement
bound method calls using the same closure, instead of converting to
interface and having wrappers convert back. Much faster and simpler.
Still thinking about how to do method values. The receiver still
needs to be captured, so there must be some closure involved, I think.
Update #50182
Change-Id: I1fbd57e7105663f8b049955b8f4111649a5f4aa8
Reviewed-on: https://go-review.googlesource.com/c/go/+/385254
Trust: Keith Randall <khr@golang.org>
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Matthew Dempsky [Wed, 23 Mar 2022 19:22:50 +0000 (12:22 -0700)]
cmd/compile: simplify fingerprint logic
Historically, we sometimes recorded imports based on either package
path ("net/http") or object file path ("net/http.a"). But modern Go
build systems always use package path, and the extra ".a" suffix
doesn't mean anything anyway.
Change-Id: I6060ef8bafa324168710d152a353f4d8db062133
Reviewed-on: https://go-review.googlesource.com/c/go/+/395254
Trust: Matthew Dempsky <mdempsky@google.com>
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Adam Pritchard [Fri, 25 Mar 2022 19:08:19 +0000 (19:08 +0000)]
net/netip: fix uses of "IPv4-mapped IPv6" in doc comments
The correct (or at least mostly commonly used) name for addresses of the
form ::ffff:192.0.2.128 is "IPv4-mapped IPv6". Some of the comments in
the netip package used that name, but others used "IPv6-mapped IPv4" or
"v6-mapped". This change makes the usage of the term consistent.
Change-Id: Ic01309ddf9252705a2387322d940b777e88800a5
GitHub-Last-Rev: 56044dcb97aeae1aa09bde635118ad46c979bbaf
GitHub-Pull-Request: golang/go#51950
Reviewed-on: https://go-review.googlesource.com/c/go/+/395914 Reviewed-by: Damien Neil <dneil@google.com>
Trust: Damien Neil <dneil@google.com>
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Trust: Ian Lance Taylor <iant@golang.org>
Russ Cox [Wed, 13 Jan 2021 15:53:48 +0000 (10:53 -0500)]
net/mail: improve detection of charset errors
The detection of the "unknown charset" case was too tailored
to one specific address parser. Make it generalize, so that custom
address parsers behave the same way as the default one
for character sets they do not handle.
Cuong Manh Le [Tue, 30 Nov 2021 17:28:25 +0000 (00:28 +0700)]
cmd/compile: handle sole component for 1-byte type interface conversion
For 1-byte type, we have a special case for converting to interface
type. But we missed an optimization for sole component-ed types, this CL
add that one.
Matthew Dempsky [Wed, 23 Mar 2022 21:24:26 +0000 (14:24 -0700)]
test: compile source files as if from "test" module
This CL updates test/run.go to compile xxx.dir/x.go with a package
path of "test/x" instead of just "x". This prevents collisions with
standard library packages.
It also requires updating a handful of tests to account for the
updated package paths.
Fixes #25693.
Change-Id: I49208c56ab3cb229ed667d547cd6e004d2175fcf
Reviewed-on: https://go-review.googlesource.com/c/go/+/395258 Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
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Daniel Martí [Fri, 18 Mar 2022 10:57:02 +0000 (10:57 +0000)]
cmd/gofmt: return a proper error for empty Go files
I was testing edge cases in gofumpt, a fork of gofmt,
and noticed that gofmt will return a bare io error on empty files,
as demonstrated by the added test case without a fix:
> ! exec $GOROOT/bin/gofmt empty.go nopackage.go
[stderr]
EOF
nopackage.go:1:1: expected 'package', found not
The problem is the code that detects concurrent modifications.
It relies on ReadFull and correctly deals with io.ErrUnexpectedEOF,
but it did not pay attention to io.EOF, which can happen when size==0.
Change-Id: I6092391721edad4584fb5922d3e3a8fb3da86493
Reviewed-on: https://go-review.googlesource.com/c/go/+/393757
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Trust: Matt Layher <mdlayher@gmail.com> Reviewed-by: Robert Griesemer <gri@golang.org>
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Robert Griesemer [Wed, 23 Mar 2022 20:29:43 +0000 (13:29 -0700)]
cmd/compile: clarify help message for -L flag
The file names reported in error messages by the compiler are
printed unchanged from the file names provided to the compiler;
the -L flag has no impact on the file names themselves, contrary
to what the old flag description suggested.
If an error is reported on a line that is affected by a //line
directive, an error message reports the file name and line as
controlled by the directive (i.e., the actual source position
is not known).
If the -L flag is provided, the actual source position is also
reported in square brackets.
This change documents this with an updated help string for the
flag.
For #36988.
Change-Id: I39ee35e6ff6cd5cfa44d87dabb05b8d78575d631
Reviewed-on: https://go-review.googlesource.com/c/go/+/395115
Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Matthew Dempsky [Fri, 18 Mar 2022 19:37:56 +0000 (12:37 -0700)]
test: remove obsolete test case that misuses -p
bug302 compiles p.go with -p=p, and then manually creates a pp.a
archive, and imports it as both "p" and "pp". This is a misuse of
cmd/compile's -p flag, and it isn't representative of how any actual
Go build systems work anyway.
This test made sense back when cmd/compile still wrote out bare object
files, which was then split into separate __.PKGDEF and _go_.o archive
entries when added to a pack archive. But since CL 102236, cmd/compile
always writes out pack files.
Updates #51734.
Change-Id: I4b5de22d348ecc0a72c98b512351c2d267c77736
Reviewed-on: https://go-review.googlesource.com/c/go/+/393896
Trust: Matthew Dempsky <mdempsky@google.com>
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Matthew Dempsky [Wed, 23 Mar 2022 22:09:31 +0000 (15:09 -0700)]
test: use dot-relative imports where appropriate
Currently, run.go's *dir tests allow "x.go" to be imported
interchangeably as either "x" or "./x". This is generally fine, but
can cause problems when "x" is the name of a standard library
package (e.g., "fixedbugs/bug345.dir/io.go").
This CL is an automated rewrite to change all `import "x"` directives
to use `import "./x"` instead. It has no effect today, but will allow
subsequent CLs to update test/run.go to resolve "./x" to "test/x" to
avoid stdlib collisions.
Change-Id: Ic76cd7140e83b47e764f8a499e59936be2b3c876
Reviewed-on: https://go-review.googlesource.com/c/go/+/395116
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Cherry Mui [Wed, 23 Mar 2022 16:02:36 +0000 (12:02 -0400)]
debug/gosym: skip non-real functions in LineToPC lookup
The code iterates through the func table to find a function with
a given file and line number. The code panics if it sees a non-
real function (e.g. go.buildid), because its CU offset is -1,
which causes an index-out-of-bounds error. The debug/gosym package
recovers the panic and returns "not found", without looping
through the rest of the entries.
Skip the non-real functions. They cannot be looked up by line
number anyway.
Fixes #51890.
Change-Id: I96f64c17b4a53ffdce047c8244b35a402a0d39ac
Reviewed-on: https://go-review.googlesource.com/c/go/+/395074
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Cherry Mui [Tue, 22 Mar 2022 00:07:06 +0000 (20:07 -0400)]
cmd/compile: don't mark non-generic defined type symbol dupok
For a non-generic defined type, we generate its type descriptor
symbol only in the defining package. So there is no duplicate and
it doesn't need to be dupok.
For unnamed types and instantiated types, the type descriptor can
be generated in multiple packages and so still need to be dupok.
Change-Id: I92ed68c998ad68c5917b77b1dfd62eac4ced6bcf
Reviewed-on: https://go-review.googlesource.com/c/go/+/394636
Trust: Cherry Mui <cherryyz@google.com>
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Cherry Mui [Tue, 22 Mar 2022 21:08:56 +0000 (17:08 -0400)]
cmd/compile: default to -p=main for main package
With the previous CL the compiler emits an unlinkable object if
the -p flag is not specified. It is actually okay (and convenient)
to omit the -p flag for (just) the main package. This CL makes it
so.
Change-Id: I978d54d14c45b3bb9ed7471e40a2c47f269b56f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/394834
Trust: Cherry Mui <cherryyz@google.com>
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Robert Findley [Mon, 21 Mar 2022 20:08:38 +0000 (16:08 -0400)]
cmd/compile/internal/importer: key tparams by Package instead of pkgname
The importer type param index used package name type parameter key,
causing type parameters to be reused/overwritten if two packages in the
import graph had the same combination of (name, declaration name, type
parameter name).
Fix this by instead using the *Package in the key.
Fixes #51836
Change-Id: I881ceaf3cf7c1ab4e0835962350feb552e79b233
Reviewed-on: https://go-review.googlesource.com/c/go/+/394219
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Rhys Hiltner [Fri, 18 Mar 2022 18:36:39 +0000 (11:36 -0700)]
runtime/pprof: rerun magnitude test on failure
Restructure TestCPUProfileMultithreadMagnitude so it will run again with
a longer duration on failure. Log the split between the user vs system
CPU time that rusage reports.
For #50232
Change-Id: Ice5b38ee7594dbee1eaa5686d32b968c306e3e85
Reviewed-on: https://go-review.googlesource.com/c/go/+/393934
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Cherry Mui [Tue, 22 Mar 2022 20:38:13 +0000 (16:38 -0400)]
cmd/link: write output in temp dir in TestUnlinkableObj
For unlinkable object the link will fail, but it opens the output
file in writable mode first then delete it on failure. This fails
if the current directory is not writable. Write to the temporary
directory instead.
Change-Id: Iefd73b5cc8efdc0f11b12edc0920169a8ad3f37c
Reviewed-on: https://go-review.googlesource.com/c/go/+/394755
Trust: Cherry Mui <cherryyz@google.com>
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Paul E. Murphy [Tue, 22 Mar 2022 16:52:02 +0000 (11:52 -0500)]
runtime: make static/dynamic startup detection work with musl on ppc64le
The glibc loader explicitly sets the first doubleword on the stack (R1)
to $0 to indicate it was dynamically loaded.
An ELFv2 ABI compliant loader will set R3/R4 to argc/argv when starting
the process, and R13 to TLS. musl is not compliant. Instead it passes
argc/argv like the kernel, but R3/R4 are in an undefined state and R13
is valid.
With the knowledge above, the startup code can be modified to
dynamically handle all three cases when linked internally.
Fixes #51787
Change-Id: I5de33862c161900d9161817388bbc13a65fdc69c
Reviewed-on: https://go-review.googlesource.com/c/go/+/394654 Reviewed-by: Cherry Mui <cherryyz@google.com>
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Cherry Mui [Mon, 21 Mar 2022 19:46:32 +0000 (15:46 -0400)]
cmd/link: simplify content hashed symbol handling
Symbol's content hash used to depend on package path expansion in
symbol names, so we have special logic handling hashed symbols
when path expansion is needed. As we required -p in the compiler
the symbol names are now fully expanded. Remove that logic.
Change-Id: I888574f63ea3789455d96468a6abd500e0958230
Reviewed-on: https://go-review.googlesource.com/c/go/+/394218
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Cherry Mui [Mon, 21 Mar 2022 17:45:50 +0000 (13:45 -0400)]
cmd/compile, cmd/link: produce unlinkable object when compile without -p
CL 391014 requires the compiler to be invoked with the -p flag, to
specify the package path. People are used to run "go tool compile"
from the command line with the -p flag. This is mostly for simple
testing, or debugging the compiler. The produced object file is
almost never intended to be linked.
This CL makes the compiler allow "go tool compile" without the -p
flag again. It will produce an unlinkable object. If the linker
sees such an object it will error out.
Change-Id: I7bdb162c3cad61dadd5c456d903b92493a3df20f
Reviewed-on: https://go-review.googlesource.com/c/go/+/394217
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hopehook [Wed, 9 Feb 2022 12:20:06 +0000 (20:20 +0800)]
net/http: fix nil body causing ParseMultipartForm to panic
ParseMultipartForm relies on a valid multipartReader, if the request body is nil,
the multipartReader should return an error. This way ParseMultipartForm can return
an error instead of causing mr.ReadForm(maxMemory) to panic
Fixes #48206
Change-Id: Ief906f2340c7ab29cacbd5f56892117202a0b911
Reviewed-on: https://go-review.googlesource.com/c/go/+/384454
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Ian Lance Taylor [Sun, 20 Mar 2022 16:32:00 +0000 (09:32 -0700)]
os: skip TestOpenFileLimit on openbsd/mips64
For #46279
For #51713
Change-Id: I444f309999bf5576449a46a9808b23cf6537e7dd
Reviewed-on: https://go-review.googlesource.com/c/go/+/394094
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Byoungchan Lee [Thu, 25 Nov 2021 11:40:21 +0000 (20:40 +0900)]
cmd/link: add DT_NEEDED for all 64-bit ELF dynimplib
Also change the relevant test to be tested on the linux-arm64 platform
as well.
Fixes #49789
Change-Id: Id2eac7a45279f037957442862f8ed63838b8e929
Reviewed-on: https://go-review.googlesource.com/c/go/+/366855
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Matthew Dempsky [Mon, 21 Mar 2022 17:06:48 +0000 (10:06 -0700)]
cmd/compile: replace Type.OrigSym with Type.OrigType
First law of cmd/compile frontend development: thou shalt not rely on
types.Sym.
This CL replaces Type.OrigSym with Type.OrigType, which semantically
matches what all of the uses within the frontend actually care about,
and avoids using types.Sym, which invariably leads to mistakes because
symbol scoping in the frontend doesn't work how anyone intuitively
expects it to.
Fixes #51765.
Change-Id: I4affe6ee0718103ce5006ab68aa7e1bb0cac6881
Reviewed-on: https://go-review.googlesource.com/c/go/+/394274
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
Robert Griesemer [Fri, 18 Mar 2022 00:35:11 +0000 (17:35 -0700)]
go/types, types2: remove predecl. test functions from ordinary tests
The type checker implements additional built-in functions (assert
and trace) that are useful for debugging. Only permit them in
manual tests (go test -run Manual), not for other tests where they
are not needed.
Change-Id: Idc7723d9e3f6b2c27769b34743561e9d0339565c
Reviewed-on: https://go-review.googlesource.com/c/go/+/393659
Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
Robert Griesemer [Fri, 18 Mar 2022 00:15:38 +0000 (17:15 -0700)]
go/types, types2: rename testfile suffixes from .src to .go
Also, manually renamed some irregularly numbered files to
make their file names more regular.
With this rename, all test files now end uniformly in .go.
go fmt doesn't descend into testdata directories, so this
is fine and makes all test files behave like regular .go
files in editors with Go language support.
Change-Id: I3abde32c35c494b94b17787788cd3d7e35662296
Reviewed-on: https://go-review.googlesource.com/c/go/+/393658
Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
Robert Griesemer [Mon, 14 Mar 2022 20:26:42 +0000 (13:26 -0700)]
go/types, types2: re-enable panic if unification stack-overflows
With all the unification/type-inference fixes in place now, we
should not see stack overflows anymore. Re-enable the panic if
we do overflow, so we can address those issues should they arise.
Fixes #51377.
Change-Id: Ied64435ea5936811504cb30bda1126c7d85980f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/392755
Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
Matthew Dempsky [Mon, 21 Mar 2022 18:24:24 +0000 (11:24 -0700)]
cmd/compile/internal/types: remove Sym.Block and Sym.Lastlineno
These fields were used for tracking the last scope/position that an
identifier was declared, so that we could report redeclaration
errors. However, redeclaration errors are now diagnosed by types2 (and
typecheck.Redeclared was removed in CL 388537), so these fields can be
safely pruned.
Updates #51691.
Change-Id: Ifd5ea3f6795fadb420913298d59287c95e4669a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/394276
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Meng Zhuo [Fri, 18 Mar 2022 09:36:52 +0000 (17:36 +0800)]
cmd/link: set alignment of compressed section based on arch
The ELF compression header(Chdr) has Addralign field that is set to the
alignment of the uncompressed section which makes section able to have
a different alignment than the decompressed section. However `file` and
other tools require both Chdr.Addralign and Addralign to be equal.
Ref https://sourceware.org/bugzilla/show_bug.cgi?id=23919
Related #42136
Fixes #51769
Change-Id: I3cf99dbd2359932576420a3c0d342c7e91b99227
Reviewed-on: https://go-review.googlesource.com/c/go/+/393916
Trust: mzh <mzh@golangcn.org> Reviewed-by: Alessandro Arzilli <alessandro.arzilli@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Fangrui Song <maskray@google.com>
Cherry Mui [Fri, 18 Mar 2022 22:23:44 +0000 (18:23 -0400)]
internal/abi, internal/buildcfg: always enable register ABI on PPC64
In last cycle we developed register ABI for ARM64, enabled by
default as a GOEXPERIMENT. This cycle we turn it on all the time.
Later CLs will clean up fallback code.
Change-Id: Idac4dcff634791cbc3d30988052ecd742b55ab8b
Reviewed-on: https://go-review.googlesource.com/c/go/+/394214
Trust: Cherry Mui <cherryyz@google.com>
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TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com>
Cuong Manh Le [Mon, 21 Mar 2022 11:49:37 +0000 (18:49 +0700)]
cmd/compile: fix panic with nested dead hidden closures
CL 342350 fixed deadcode panic with dead hidden closures. However, a
closure may contains nested dead hidden closures, so we need to mark
them dead as well.
Fixes #51839
Change-Id: Ib54581adfc1bdea60e74d733cd30fd8e783da983
Reviewed-on: https://go-review.googlesource.com/c/go/+/394079
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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