[dev.simd] all: merge master (ca37d24) into dev.simd

Conflicts:

- src/cmd/compile/internal/typecheck/builtin.go

Merge List:

+ 2025-11-20 ca37d24e0b net/http: drop unused "broken" field from persistConn
+ 2025-11-20 4b740af56a cmd/internal/obj/x86: handle global reference in From3 in dynlink mode
+ 2025-11-20 790384c6c2 spec: adjust rule for type parameter on RHS of alias declaration
+ 2025-11-20 a49b0302d0 net/http: correctly close fake net.Conns
+ 2025-11-20 32f5aadd2f cmd/compile: stack allocate backing stores during append
+ 2025-11-20 a18aff8057 runtime: select GC mark workers during start-the-world
+ 2025-11-20 829779f4fe runtime: split findRunnableGCWorker in two
+ 2025-11-20 ab59569099 go/version: use "custom" as an example of a version suffix
+ 2025-11-19 c4bb9653ba cmd/compile: Implement LoweredZeroLoop with LSX Instruction on loong64
+ 2025-11-19 7f2ae21fb4 cmd/internal/obj/loong64: add MULW.D.W[U] instructions
+ 2025-11-19 a2946f2385 crypto: add Encapsulator and Decapsulator interfaces
+ 2025-11-19 6b83bd7146 crypto/ecdh: add KeyExchanger interface
+ 2025-11-19 4fef9f8b55 go/types, types2: fix object path for grouped declaration statements
+ 2025-11-19 33529db142 spec: escape double-ampersands
+ 2025-11-19 dc42565a20 cmd/compile: fix control flow for unsigned divisions proof relations
+ 2025-11-19 e64023dcbf cmd/compile: cleanup useless if statement in prove
+ 2025-11-19 2239520d1c test: go fmt prove.go tests
+ 2025-11-19 489d3dafb7 math: switch s390x math.Pow to generic implementation
+ 2025-11-18 8c41a482f9 runtime: add dlog.hexdump
+ 2025-11-18 e912618bd2 runtime: add hexdumper
+ 2025-11-18 2cf9d4b62f Revert "net/http: do not discard body content when closing it within request handlers"
+ 2025-11-18 4d0658bb08 cmd/compile: prefer fixed registers for values
+ 2025-11-18 ba634ca5c7 cmd/compile: fold boolean NOT into branches
+ 2025-11-18 8806d53c10 cmd/link: align sections, not symbols after DWARF compress
+ 2025-11-18 c93766007d runtime: do not print recovered when double panic with the same value
+ 2025-11-18 9859b43643 cmd/asm,cmd/compile,cmd/internal/obj/riscv: use compressed instructions on riscv64
+ 2025-11-17 b9ef0633f6 cmd/internal/sys,internal/goarch,runtime: enable the use of compressed instructions on riscv64
+ 2025-11-17 a087dea869 debug/elf: sync new loong64 relocation types up to LoongArch ELF psABI v20250521
+ 2025-11-17 e1a12c781f cmd/compile: use 32x32->64 multiplies on arm64
+ 2025-11-17 6caab99026 runtime: relax TestMemoryLimit on darwin a bit more
+ 2025-11-17 eda2e8c683 runtime: clear frame pointer at thread entry points
+ 2025-11-17 6919858338 runtime: rename findrunnable references to findRunnable
+ 2025-11-17 8e734ec954 go/ast: fix BasicLit.End position for raw strings containing \r
+ 2025-11-17 592775ec7d crypto/mlkem: avoid a few unnecessary inverse NTT calls
+ 2025-11-17 590cf18daf crypto/mlkem/mlkemtest: add derandomized Encapsulate768/1024
+ 2025-11-17 c12c337099 cmd/compile: teach prove about subtract idioms
+ 2025-11-17 bc15963813 cmd/compile: clean up prove pass
+ 2025-11-17 1297fae708 go/token: add (*File).End method
+ 2025-11-17 65c09eafdf runtime: hoist invariant code out of heapBitsSmallForAddrInline
+ 2025-11-17 594129b80c internal/runtime/maps: update doc for table.Clear
+ 2025-11-15 c58d075e9a crypto/rsa: deprecate PKCS#1 v1.5 encryption
+ 2025-11-14 d55ecea9e5 runtime: usleep before stealing runnext only if not in syscall
+ 2025-11-14 410ef44f00 cmd: update x/tools to 59ff18c
+ 2025-11-14 50128a2154 runtime: support runtime.freegc in size-specialized mallocs for noscan objects
+ 2025-11-14 c3708350a4 cmd/go: tests: rename git-min-vers->git-sha256
+ 2025-11-14 aea881230d std: fix printf("%q", int) mistakes
+ 2025-11-14 120f1874ef runtime: add more precise test of assist credit handling for runtime.freegc
+ 2025-11-14 fecfcaa4f6 runtime: add runtime.freegc to reduce GC work
+ 2025-11-14 5a347b775e runtime: set GOEXPERIMENT=runtimefreegc to disabled by default
+ 2025-11-14 1a03d0db3f runtime: skip tests for GOEXPERIMENT=arenas that do not handle clobberfree=1
+ 2025-11-14 cb0d9980f5 net/http: do not discard body content when closing it within request handlers
+ 2025-11-14 03ed43988f cmd/compile: allow multi-field structs to be stored directly in interfaces
+ 2025-11-14 1bb1f2bf0c runtime: put AddCleanup cleanup arguments in their own allocation
+ 2025-11-14 9fd2e44439 runtime: add AddCleanup benchmark
+ 2025-11-14 80c91eedbb runtime: ensure weak handles end up in their own allocation
+ 2025-11-14 7a8d0b5d53 runtime: add debug mode to extend _Grunning-without-P windows
+ 2025-11-14 710abf74da internal/runtime/cgobench: add Go function call benchmark for comparison
+ 2025-11-14 b24aec598b doc, cmd/internal/obj/riscv: document the riscv64 assembler
+ 2025-11-14 a0e738c657 cmd/compile/internal: remove incorrect riscv64 SLTI rule
+ 2025-11-14 2cdcc4150b cmd/compile: fold negation into multiplication
+ 2025-11-14 b57962b7c7 bytes: fix panic in bytes.Buffer.Peek
+ 2025-11-14 0a569528ea cmd/compile: optimize comparisons with single bit difference
+ 2025-11-14 1e5e6663e9 cmd/compile: remove unnecessary casts and types from riscv64 rules
+ 2025-11-14 ddd8558e61 go/types, types2: swap object.color for Checker.objPathIdx
+ 2025-11-14 9daaab305c cmd/link/internal/ld: make runtime.buildVersion with experiments valid
+ 2025-11-13 d50a571ddf test: fix tests to work with sizespecializedmalloc turned off
+ 2025-11-13 704f841eab cmd/trace: annotation proc start/stop with thread and proc always
+ 2025-11-13 17a02b9106 net/http: remove unused isLitOrSingle and isNotToken
+ 2025-11-13 ff61991aed cmd/go: fix flaky TestScript/mod_get_direct
+ 2025-11-13 129d0cb543 net/http/cgi: accept INCLUDED as protocol for server side includes
+ 2025-11-13 77c5130100 go/types: minor simplification
+ 2025-11-13 7601cd3880 go/types: generate cycles.go
+ 2025-11-13 7a372affd9 go/types, types2: rename definedType to declaredType and clarify docs

Change-Id: Ibaa9bdb982364892f80e511c1bb12661fcd5fb86

6 files changed, 29 insertions, 17 deletions

diff --git a/src/net/http/cgi/child.go b/src/net/http/cgi/child.go
index e29fe20d7d..466d42c08e 100644
--- a/src/net/http/cgi/child.go
+++ b/src/net/http/cgi/child.go
@@ -57,8 +57,11 @@ func RequestFromMap(params map[string]string) (*http.Request, error) {
 
 	r.Proto = params["SERVER_PROTOCOL"]
 	var ok bool
-	r.ProtoMajor, r.ProtoMinor, ok = http.ParseHTTPVersion(r.Proto)
-	if !ok {
+	if r.Proto == "INCLUDED" {
+		// SSI (Server Side Include) use case
+		// CGI Specification RFC 3875 - section 4.1.16
+		r.ProtoMajor, r.ProtoMinor = 1, 0
+	} else if r.ProtoMajor, r.ProtoMinor, ok = http.ParseHTTPVersion(r.Proto); !ok {
 		return nil, errors.New("cgi: invalid SERVER_PROTOCOL version")
 	}
 
diff --git a/src/net/http/cgi/child_test.go b/src/net/http/cgi/child_test.go
index 18cf789bd5..f901bec1a8 100644
--- a/src/net/http/cgi/child_test.go
+++ b/src/net/http/cgi/child_test.go
@@ -154,6 +154,28 @@ func TestRequestWithoutRemotePort(t *testing.T) {
 	}
 }
 
+// CGI Specification RFC 3875 - section 4.1.16
+// INCLUDED value for SERVER_PROTOCOL must be treated as an HTTP/1.0 request
+func TestIncludedServerProtocol(t *testing.T) {
+	env := map[string]string{
+		"REQUEST_METHOD":  "GET",
+		"SERVER_PROTOCOL": "INCLUDED",
+	}
+	req, err := RequestFromMap(env)
+	if req.Proto != "INCLUDED" {
+		t.Errorf("unexpected change to SERVER_PROTOCOL")
+	}
+	if major := req.ProtoMajor; major != 1 {
+		t.Errorf("ProtoMajor: got %d, want %d", major, 1)
+	}
+	if minor := req.ProtoMinor; minor != 0 {
+		t.Errorf("ProtoMinor: got %d, want %d", minor, 0)
+	}
+	if err != nil {
+		t.Fatalf("expected INCLUDED to be treated as HTTP/1.0 request")
+	}
+}
+
 func TestResponse(t *testing.T) {
 	var tests = []struct {
 		name   string
diff --git a/src/net/http/http.go b/src/net/http/http.go
index e7959fa3b6..d346e60646 100644
--- a/src/net/http/http.go
+++ b/src/net/http/http.go
@@ -119,10 +119,6 @@ func removeEmptyPort(host string) string {
 	return host
 }
 
-func isNotToken(r rune) bool {
-	return !httpguts.IsTokenRune(r)
-}
-
 // isToken reports whether v is a valid token (https://www.rfc-editor.org/rfc/rfc2616#section-2.2).
 func isToken(v string) bool {
 	// For historical reasons, this function is called ValidHeaderFieldName (see issue #67031).
diff --git a/src/net/http/netconn_test.go b/src/net/http/netconn_test.go
index 52b8069f8b..c5fd61289f 100644
--- a/src/net/http/netconn_test.go
+++ b/src/net/http/netconn_test.go
@@ -180,9 +180,10 @@ func (c *fakeNetConn) Close() error {
 	c.loc.unlock()
 	// Remote half of the connection reads EOF after reading any remaining data.
 	c.rem.lock()
-	if c.rem.readErr != nil {
+	if c.rem.readErr == nil {
 		c.rem.readErr = io.EOF
 	}
+	c.rem.writeErr = net.ErrClosed
 	c.rem.unlock()
 	if c.autoWait {
 		synctest.Wait()
diff --git a/src/net/http/pattern.go b/src/net/http/pattern.go
index 8fd120e777..a5063807c6 100644
--- a/src/net/http/pattern.go
+++ b/src/net/http/pattern.go
@@ -394,14 +394,6 @@ func inverseRelationship(r relationship) relationship {
 	}
 }
 
-// isLitOrSingle reports whether the segment is a non-dollar literal or a single wildcard.
-func isLitOrSingle(seg segment) bool {
-	if seg.wild {
-		return !seg.multi
-	}
-	return seg.s != "/"
-}
-
 // describeConflict returns an explanation of why two patterns conflict.
 func describeConflict(p1, p2 *pattern) string {
 	mrel := p1.compareMethods(p2)
diff --git a/src/net/http/transport.go b/src/net/http/transport.go
index a560765d33..4e6b07f34d 100644
--- a/src/net/http/transport.go
+++ b/src/net/http/transport.go
@@ -2110,7 +2110,6 @@ type persistConn struct {
 	numExpectedResponses int
 	closed               error // set non-nil when conn is closed, before closech is closed
 	canceledErr          error // set non-nil if conn is canceled
-	broken               bool  // an error has happened on this connection; marked broken so it's not reused.
 	reused               bool  // whether conn has had successful request/response and is being reused.
 	// mutateHeaderFunc is an optional func to modify extra
 	// headers on each outbound request before it's written. (the
@@ -2925,7 +2924,6 @@ func (pc *persistConn) closeLocked(err error) {
 	if err == nil {
 		panic("nil error")
 	}
-	pc.broken = true
 	if pc.closed == nil {
 		pc.closed = err
 		pc.t.decConnsPerHost(pc.cacheKey)