[dev.simd] all: merge master (8dd5b13) into dev.simd

Merge List:

+ 2025-11-24 8dd5b13 cmd/compile: relax stmtline_test on amd64
+ 2025-11-23 feae743 cmd/compile: use 32x32->64 multiplies on loong64
+ 2025-11-23 e88be8a runtime: fix stale comment for mheap/malloc
+ 2025-11-23 a318843 cmd/internal/obj/loong64: optimize duplicate optab entries
+ 2025-11-23 a18294b cmd/internal/obj/arm64, image/gif, runtime, sort: use math/bits to calculate log2
+ 2025-11-23 437323e slices: fix incorrect comment in slices.Insert function documentation
+ 2025-11-23 1993dca doc/next: pre-announce end of support for macOS 12 in Go 1.27
+ 2025-11-22 337f7b1 cmd/go: update default go directive in mod or work init
+ 2025-11-21 3c26aef cmd/internal/obj/riscv: improve large branch/call/jump tests
+ 2025-11-21 31aa9f8 crypto/tls: use inner hello for earlyData when using QUIC and ECH
+ 2025-11-21 d68aec8 runtime: replace trace seqlock with write flag
+ 2025-11-21 8d9906c runtime/trace: add Log benchmark
+ 2025-11-21 6aeacdf cmd/go: support sha1 repos when git default is sha256
+ 2025-11-21 9570036 crypto/sha3: make the zero value of SHAKE useable
+ 2025-11-21 155efbb crypto/sha3: make the zero value of SHA3 useable
+ 2025-11-21 6f16669 database/sql: don't ignore ColumnConverter for unknown input count
+ 2025-11-21 121bc3e runtime/pprof: remove hard-coded sleep in CPU profile reader
+ 2025-11-21 b604148 runtime: fix double wakeup in CPU profile buffer
+ 2025-11-21 22f24f9 cmd/compile: change testing.B.Loop keep alive semantic
+ 2025-11-21 cfb9d2e net: remove unused linknames
+ 2025-11-21 65ef314 net/http: remove unused linknames
+ 2025-11-21 0f32fbc net/http: populate Response.Request when using NewFileTransport
+ 2025-11-21 3e0a8e7 net/http: preserve original path encoding in redirects
+ 2025-11-21 831af61 net/http: use HTTP 307 redirects in ServeMux
+ 2025-11-21 8726922 net/http: update Response.Request.URL after redirects on GOOS=js
+ 2025-11-21 7aa9ca7 net/http/cookiejar: treat localhost as secure origin
+ 2025-11-21 f870a1d net/url: warn that JoinPath arguments should be escaped
+ 2025-11-21 9962d95 crypto/internal/fips140/mldsa: unroll NTT and inverseNTT
+ 2025-11-21 f821fc4 crypto/internal/fisp140test: update acvptool, test data
+ 2025-11-21 b59efc3 crypto/internal/fips140/mldsa: new package
+ 2025-11-21 6274148 runtime: remove linkname for gopanic
+ 2025-11-21 7db2f0b crypto/internal/hpke: separate KEM and PublicKey/PrivateKey interfaces
+ 2025-11-21 e15800c crypto/internal/hpke: add ML-KEM and hybrid KEMs, and SHAKE KDFs
+ 2025-11-21 7c985a2 crypto/internal/hpke: modularize API and support more ciphersuites
+ 2025-11-21 e7d47ac cmd/compile: simplify negative on multiplication
+ 2025-11-21 35d2712 net/http: fix typo in Transport docs
+ 2025-11-21 90c970c net: remove unnecessary loop variable copies in tests
+ 2025-11-21 9772d3a cmd/cgo: strip top-level const qualifier from argument frame struct
+ 2025-11-21 1903782 errors: add examples for custom Is/As matching
+ 2025-11-21 ec92bc6 cmd/compile: rewrite Rsh to RshU if arguments are proved positive
+ 2025-11-21 3820f94 cmd/compile: propagate unsigned relations for Rsh if arguments are positive
+ 2025-11-21 d474f1f cmd/compile: make dse track multiple shadowed ranges
+ 2025-11-21 d0d0a72 cmd/compile/internal/ssa: correct type of ARM64 conditional instructions
+ 2025-11-21 a9704f8 internal/runtime/gc/scan: add AVX512 impl of filterNil.
+ 2025-11-21 ccd3890 cmd/internal/objabi: remove -V=goexperiment internal special case
+ 2025-11-21 e7787b9 runtime: go fmt
+ 2025-11-21 17b3b98 internal/strconv: go fmt
+ 2025-11-21 c851827 internal/trace: go fmt
+ 2025-11-21 f87aaec cmd/compile: fix integer overflow in prove pass
+ 2025-11-21 dbd2ab9 cmd/compile/internal: fix typos
+ 2025-11-21 b9d86ba cmd/compile/internal/devirtualize: fix typos
+ 2025-11-20 4b0e3cc cmd/link: support loading R_LARCH_PCREL20_S2 and R_LARCH_CALL36 relocs
+ 2025-11-20 cdba82c cmd/internal/obj/loong64: add {,X}VSLT.{B/H/W/V}{,U} instructions support
+ 2025-11-20 bd2b117 crypto/tls: add QUICErrorEvent
+ 2025-11-20 3ad2e11 net/http/httputil: wrap ReverseProxy's outbound request body so Close is a noop
+ 2025-11-20 d58b733 runtime: track goroutine location until actual STW
+ 2025-11-20 1bc5486 cmd/vendor: update to x/tools@68724af
+ 2025-11-20 8c31959 runtime: disable stack allocation tests on sanitizers
+ 2025-11-20 ff654ea net/url: permit colons in the host of postgresql:// URLs
+ 2025-11-20 a662bad encoding/json: remove linknames
+ 2025-11-20 5afe237 mime: add missing path for mime types in godoc
+ 2025-11-20 c1b7112 os/signal: make NotifyContext cancel the context with a cause

Change-Id: Ib93ef643be610dfbdd83ff45095a7b1ca2537b8b

Author: cherrymui

api/next/75108.txt

@@ -0,0 +1,3 @@
+pkg crypto/tls, const QUICErrorEvent = 10 #75108
+pkg crypto/tls, const QUICErrorEvent QUICEventKind #75108
+pkg crypto/tls, type QUICEvent struct, Err error #75108

doc/next/6-stdlib/99-minor/crypto/tls/75108.md

@@ -0,0 +1,2 @@
+The [QUICConn] type used by QUIC implementations includes new event
+for reporting TLS handshake errors.

doc/next/6-stdlib/99-minor/os/signal/notifycontext.md

@@ -0,0 +1,2 @@
+[NotifyContext] now cancels the returned context with [context.CancelCauseFunc]
+and an error indicating which signal was received.

doc/next/7-ports.md

@@ -1,6 +1,13 @@
 ## Ports {#ports}
 
+### Darwin
+
+<!-- go.dev/issue/75836 -->
+
+Go 1.26 is the last release that will run on macOS 12 Monterey. Go 1.27 will require macOS 13 Ventura or later.
+
 ### Windows
 
 <!-- go.dev/issue/71671 -->
+
 As [announced](/doc/go1.25#windows) in the Go 1.25 release notes, the [broken](/doc/go1.24#windows) 32-bit windows/arm port (`GOOS=windows` `GOARCH=arm`) is removed.

src/cmd/asm/internal/asm/testdata/loong64enc1.s

@@ -597,6 +597,42 @@ lable2:
 	XVSEQV		$15, X2, X4     // 44bc8176
 	XVSEQV		$-15, X2, X4    // 44c48176
 
+	// VSLTB{B,H,W,V}, XVSLTB{B,H,W,V} instruction
+	VSLTB		V1, V2, V3      // 43040670
+	VSLTH		V1, V2, V3      // 43840670
+	VSLTW		V1, V2, V3      // 43040770
+	VSLTV		V1, V2, V3      // 43840770
+	XVSLTB		X1, X2, X3      // 43040674
+	XVSLTH		X1, X2, X3      // 43840674
+	XVSLTW		X1, X2, X3      // 43040774
+	XVSLTV		X1, X2, X3      // 43840774
+	VSLTB		$1, V2, V3      // 43048672
+	VSLTH		$16, V2, V3     // 43c08672
+	VSLTW		$-16, V2, V3    // 43408772
+	VSLTV		$-15, V2, V3    // 43c48772
+	XVSLTB		$1, X2, X3      // 43048676
+	XVSLTH		$16, X2, X3     // 43c08676
+	XVSLTW		$-16, X2, X3    // 43408776
+	XVSLTV		$-16, X2, X3    // 43c08776
+
+	// VSLTB{B,H,W,V}U, XVSLTB{B,H,W,V}U instruction
+	VSLTBU		V1, V2, V3      // 43040870
+	VSLTHU		V1, V2, V3      // 43840870
+	VSLTWU		V1, V2, V3      // 43040970
+	VSLTVU		V1, V2, V3      // 43840970
+	XVSLTBU		X1, X2, X3      // 43040874
+	XVSLTHU		X1, X2, X3      // 43840874
+	XVSLTWU		X1, X2, X3      // 43040974
+	XVSLTVU		X1, X2, X3      // 43840974
+	VSLTBU		$0, V2, V3      // 43008872
+	VSLTHU		$31, V2, V3     // 43fc8872
+	VSLTWU		$16, V2, V3     // 43408972
+	VSLTVU		$1, V2, V3      // 43848972
+	XVSLTBU		$0, X2, X3      // 43008876
+	XVSLTHU		$31, X2, X3     // 43fc8876
+	XVSLTWU		$8, X2, X3      // 43208976
+	XVSLTVU		$0, X2, X3      // 43808976
+
 	// VPCNT{B,H,W,V}, XVPCNT{B,H,W,V} instruction
 	VPCNTB		V1, V2          // 22209c72
 	VPCNTH		V1, V2          // 22249c72

src/cmd/cgo/internal/test/test.go

@@ -953,6 +953,12 @@ typedef struct {
 } issue69086struct;
 static int issue690861(issue69086struct* p) { p->b = 1234; return p->c; }
 static int issue690862(unsigned long ul1, unsigned long ul2, unsigned int u, issue69086struct s) { return (int)(s.b); }
+
+char issue75751v = 1;
+char * const issue75751p = &issue75751v;
+#define issue75751m issue75751p
+char * const volatile issue75751p2 = &issue75751v;
+#define issue75751m2 issue75751p2
 */
 import "C"
 
@@ -2396,3 +2402,8 @@ func test69086(t *testing.T) {
 		t.Errorf("call: got %d, want 1234", got)
 	}
 }
+
+// Issue 75751: no runtime test, just make sure it compiles.
+func test75751() int {
+	return int(*C.issue75751m) + int(*C.issue75751m2)
+}

src/cmd/cgo/out.go

@@ -457,6 +457,36 @@ func checkImportSymName(s string) {
 // Also assumes that gc convention is to word-align the
 // input and output parameters.
 func (p *Package) structType(n *Name) (string, int64) {
+	// It's possible for us to see a type with a top-level const here,
+	// which will give us an unusable struct type. See #75751.
+	// The top-level const will always appear as a final qualifier,
+	// constructed by typeConv.loadType in the dwarf.QualType case.
+	// The top-level const is meaningless here and can simply be removed.
+	stripConst := func(s string) string {
+		i := strings.LastIndex(s, "const")
+		if i == -1 {
+			return s
+		}
+
+		// A top-level const can only be followed by other qualifiers.
+		if r, ok := strings.CutSuffix(s, "const"); ok {
+			return strings.TrimSpace(r)
+		}
+
+		var nonConst []string
+		for _, f := range strings.Fields(s[i:]) {
+			switch f {
+			case "const":
+			case "restrict", "volatile":
+				nonConst = append(nonConst, f)
+			default:
+				return s
+			}
+		}
+
+		return strings.TrimSpace(s[:i]) + " " + strings.Join(nonConst, " ")
+	}
+
 	var buf strings.Builder
 	fmt.Fprint(&buf, "struct {\n")
 	off := int64(0)
@@ -468,7 +498,7 @@ func (p *Package) structType(n *Name) (string, int64) {
 		}
 		c := t.Typedef
 		if c == "" {
-			c = t.C.String()
+			c = stripConst(t.C.String())
 		}
 		fmt.Fprintf(&buf, "\t\t%s p%d;\n", c, i)
 		off += t.Size
@@ -484,7 +514,7 @@ func (p *Package) structType(n *Name) (string, int64) {
 			fmt.Fprintf(&buf, "\t\tchar __pad%d[%d];\n", off, pad)
 			off += pad
 		}
-		fmt.Fprintf(&buf, "\t\t%s r;\n", t.C)
+		fmt.Fprintf(&buf, "\t\t%s r;\n", stripConst(t.C.String()))
 		off += t.Size
 	}
 	if off%p.PtrSize != 0 {