[dev.unified] all: merge master (85d87b9) into dev.unifieddev.unified

Merge List:

+ 2022-08-04 85d87b9c75 all: update vendored golang.org/x dependencies for Go 1.20 development
+ 2022-08-04 fb1bfd4d37 all: remove pre-Go 1.17 workarounds
+ 2022-08-04 44ff9bff0c runtime: clean up panic and deadlock lock ranks
+ 2022-08-04 f42dc0de74 runtime: make the lock rank DAG make more sense
+ 2022-08-04 d29a0282e9 runtime: add mayAcquire annotation for finlock
+ 2022-08-04 c5be4ed7df runtime: add missing trace lock edges
+ 2022-08-04 2b8a9a484f runtime: generate the lock ranking from a DAG description
+ 2022-08-04 ddfd639408 runtime: delete unused lock ranks
+ 2022-08-04 426ea5702b internal/dag: add a Graph type and make node order deterministic
+ 2022-08-04 d37cc9a8cd go/build, internal/dag: lift DAG parser into an internal package
+ 2022-08-04 ab0a94c6d3 cmd/dist: require Go 1.17 for building Go
+ 2022-08-04 1e3c19f3fe runtime: support riscv64 SV57 mode
+ 2022-08-03 f28fa952b5 make.bat, make.rc: show bootstrap toolchain version
+ 2022-08-03 87384801dc cmd/asm: update package doc to describe "-p" option
+ 2022-08-03 c6a2dada0d net: disable TestIPv6WriteMsgUDPAddrPortTargetAddrIPVersion [sic] on DragonflyBSD
+ 2022-08-02 29b9a328d2 runtime: trivial replacements of g in remaining files
+ 2022-08-02 c647264619 runtime: trivial replacements of g in signal_unix.go
+ 2022-08-02 399f50c9d7 runtime: tricky replacements of g in traceback.go
+ 2022-08-02 4509e951ec runtime: tricky replacements of g in proc.go
+ 2022-08-02 4400238ec8 runtime: trivial replacements of _g_ in remaining files
+ 2022-08-02 5999a28de8 runtime: trivial replacements of _g_ in os files
+ 2022-08-02 0e18cf6d09 runtime: trivial replacements of _g_ in GC files
+ 2022-08-02 4358a53a97 runtime: trivial replacements of _g_ in proc.go
+ 2022-08-02 b486518964 runtime: tricky replacements of _g_ in os3_solaris.go
+ 2022-08-02 54a0ab3f7b runtime: tricky replacements of _g_ in os3_plan9.go
+ 2022-08-02 4240ff764b runtime: tricky replacements of _g_ in signal_windows.go
+ 2022-08-02 8666d89ca8 runtime: tricky replacements of _g_ in signal_unix.go
+ 2022-08-02 74cee276fe runtime: tricky replacements of _g_ in trace.go
+ 2022-08-02 222799fde6 runtime: tricky replacements of _g_ in mgc.go
+ 2022-08-02 e9d7f54a1a runtime: tricky replacements of _g_ in proc.go
+ 2022-08-02 5e8d261918 runtime: rename _p_ to pp
+ 2022-08-02 0ad2ec6596 runtime: clean up dopanic_m
+ 2022-08-02 7e952962df runtime: clean up canpanic
+ 2022-08-02 9dbc0f3556 runtime: fix outdated g.m comment in traceback.go
+ 2022-08-02 d723df76da internal/goversion: update Version to 1.20
+ 2022-08-02 1b7e71e8ae all: disable tests that fail on Alpine
+ 2022-08-01 f2a9f3e2e0 test: improve generic type assertion test
+ 2022-08-01 27038b70f8 cmd/compile: fix wrong dict pass condition for type assertions
+ 2022-08-01 e99f53fed9 doc: move Go 1.19 release notes to x/website
+ 2022-08-01 8b13a073a1 doc: mention removal of cmd/compile's -importmap and -installsuffix flags
+ 2022-08-01 e95fd4c238 doc/go1.19: fix typo: EM_LONGARCH -> EM_LOONGARCH
+ 2022-08-01 dee3efd9f8 doc/go1.19: fix a few links that were missing trailing slashes
+ 2022-07-30 f32519e5fb runtime: fix typos
+ 2022-07-29 9a2001a8cc cmd/dist: always pass -short=true with -quick
+ 2022-07-28 5c8ec89cb5 doc/go1.19: minor adjustments and links
+ 2022-07-28 417be37048 doc/go1.19: improve the loong64 release notes
+ 2022-07-28 027855e8d8 os/exec: add GODEBUG setting to opt out of ErrDot changes

Change-Id: Idc0fbe93978c0dff7600b90a2c3ecc067fd9f5f2

8 files changed, 16 insertions, 95 deletions

diff --git a/src/cmd/compile/internal/gc/bootstrap.go b/src/cmd/compile/internal/gc/bootstrap.go
deleted file mode 100644
index 37b0d59ede..0000000000
--- a/src/cmd/compile/internal/gc/bootstrap.go
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build !go1.8
-// +build !go1.8
-
-package gc
-
-import (
-	"cmd/compile/internal/base"
-	"runtime"
-)
-
-func startMutexProfiling() {
-	base.Fatalf("mutex profiling unavailable in version %v", runtime.Version())
-}
diff --git a/src/cmd/compile/internal/gc/pprof.go b/src/cmd/compile/internal/gc/pprof.go
deleted file mode 100644
index 5f9b030621..0000000000
--- a/src/cmd/compile/internal/gc/pprof.go
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2017 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build go1.8
-// +build go1.8
-
-package gc
-
-import "runtime"
-
-func startMutexProfiling() {
-	runtime.SetMutexProfileFraction(1)
-}
diff --git a/src/cmd/compile/internal/gc/trace.go b/src/cmd/compile/internal/gc/trace.go
deleted file mode 100644
index 8cdbd4b0f3..0000000000
--- a/src/cmd/compile/internal/gc/trace.go
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build go1.7
-// +build go1.7
-
-package gc
-
-import (
-	"os"
-	tracepkg "runtime/trace"
-
-	"cmd/compile/internal/base"
-)
-
-func init() {
-	traceHandler = traceHandlerGo17
-}
-
-func traceHandlerGo17(traceprofile string) {
-	f, err := os.Create(traceprofile)
-	if err != nil {
-		base.Fatalf("%v", err)
-	}
-	if err := tracepkg.Start(f); err != nil {
-		base.Fatalf("%v", err)
-	}
-	base.AtExit(tracepkg.Stop)
-}
diff --git a/src/cmd/compile/internal/gc/util.go b/src/cmd/compile/internal/gc/util.go
index 56fd137de2..dcac0ce79a 100644
--- a/src/cmd/compile/internal/gc/util.go
+++ b/src/cmd/compile/internal/gc/util.go
@@ -8,12 +8,11 @@ import (
 	"os"
 	"runtime"
 	"runtime/pprof"
+	tracepkg "runtime/trace"
 
 	"cmd/compile/internal/base"
 )
 
-var traceHandler func(string)
-
 func startProfile() {
 	if base.Flag.CPUProfile != "" {
 		f, err := os.Create(base.Flag.CPUProfile)
@@ -64,13 +63,20 @@ func startProfile() {
 		if err != nil {
 			base.Fatalf("%v", err)
 		}
-		startMutexProfiling()
+		runtime.SetMutexProfileFraction(1)
 		base.AtExit(func() {
 			pprof.Lookup("mutex").WriteTo(f, 0)
 			f.Close()
 		})
 	}
-	if base.Flag.TraceProfile != "" && traceHandler != nil {
-		traceHandler(base.Flag.TraceProfile)
+	if base.Flag.TraceProfile != "" {
+		f, err := os.Create(base.Flag.TraceProfile)
+		if err != nil {
+			base.Fatalf("%v", err)
+		}
+		if err := tracepkg.Start(f); err != nil {
+			base.Fatalf("%v", err)
+		}
+		base.AtExit(tracepkg.Stop)
 	}
 }
diff --git a/src/cmd/compile/internal/logopt/escape.go b/src/cmd/compile/internal/logopt/escape.go
deleted file mode 100644
index 9660e938b4..0000000000
--- a/src/cmd/compile/internal/logopt/escape.go
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build go1.8
-// +build go1.8
-
-package logopt
-
-import "net/url"
-
-func pathEscape(s string) string {
-	return url.PathEscape(s)
-}
diff --git a/src/cmd/compile/internal/logopt/escape_bootstrap.go b/src/cmd/compile/internal/logopt/escape_bootstrap.go
deleted file mode 100644
index cc04eaadfd..0000000000
--- a/src/cmd/compile/internal/logopt/escape_bootstrap.go
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build !go1.8
-// +build !go1.8
-
-package logopt
-
-// For bootstrapping with an early version of Go
-func pathEscape(s string) string {
-	panic("This should never be called; the compiler is not fully bootstrapped if it is.")
-}
diff --git a/src/cmd/compile/internal/logopt/log_opts.go b/src/cmd/compile/internal/logopt/log_opts.go
index 9fee83426f..09825e8278 100644
--- a/src/cmd/compile/internal/logopt/log_opts.go
+++ b/src/cmd/compile/internal/logopt/log_opts.go
@@ -376,7 +376,7 @@ func writerForLSP(subdirpath, file string) io.WriteCloser {
 	if lastdot != -1 {
 		basename = basename[:lastdot]
 	}
-	basename = pathEscape(basename)
+	basename = url.PathEscape(basename)
 
 	// Assume a directory, make a file
 	p := filepath.Join(subdirpath, basename+".json")
@@ -428,7 +428,7 @@ func FlushLoggedOpts(ctxt *obj.Link, slashPkgPath string) {
 		if slashPkgPath == "" {
 			slashPkgPath = "\000"
 		}
-		subdirpath := filepath.Join(dest, pathEscape(slashPkgPath))
+		subdirpath := filepath.Join(dest, url.PathEscape(slashPkgPath))
 		err := os.MkdirAll(subdirpath, 0755)
 		if err != nil {
 			log.Fatalf("Could not create directory %s for logging optimizer actions, %v", subdirpath, err)
diff --git a/src/cmd/compile/internal/noder/stencil.go b/src/cmd/compile/internal/noder/stencil.go
index 280f7cdf1c..d3f51e00cd 100644
--- a/src/cmd/compile/internal/noder/stencil.go
+++ b/src/cmd/compile/internal/noder/stencil.go
@@ -1357,6 +1357,9 @@ func (g *genInst) dictPass(info *instInfo) {
 			}
 		case ir.ODOTTYPE, ir.ODOTTYPE2:
 			dt := m.(*ir.TypeAssertExpr)
+			if dt.Type().IsEmptyInterface() || (dt.Type().IsInterface() && !dt.Type().HasShape()) {
+				break
+			}
 			if !dt.Type().HasShape() && !(dt.X.Type().HasShape() && !dt.X.Type().IsEmptyInterface()) {
 				break
 			}