net/http/httputil: remove redundant pw.Close() call in DumpRequestOut

api/next/49097.txt

@@ -0,0 +1,4 @@
+pkg net, method (*Dialer) DialIP(context.Context, string, netip.Addr, netip.Addr) (*IPConn, error) #49097
+pkg net, method (*Dialer) DialTCP(context.Context, string, netip.AddrPort, netip.AddrPort) (*TCPConn, error) #49097
+pkg net, method (*Dialer) DialUDP(context.Context, string, netip.AddrPort, netip.AddrPort) (*UDPConn, error) #49097
+pkg net, method (*Dialer) DialUnix(context.Context, string, *UnixAddr, *UnixAddr) (*UnixConn, error) #49097

api/next/67546.txt

@@ -0,0 +1,5 @@
+pkg database/sql/driver, type RowsColumnScanner interface { Close, Columns, Next, ScanColumn } #67546
+pkg database/sql/driver, type RowsColumnScanner interface, Close() error #67546
+pkg database/sql/driver, type RowsColumnScanner interface, Columns() []string #67546
+pkg database/sql/driver, type RowsColumnScanner interface, Next([]Value) error #67546
+pkg database/sql/driver, type RowsColumnScanner interface, ScanColumn(interface{}, int) error #67546

doc/go_mem.html

@@ -231,7 +231,7 @@ <h2 id="restrictions">Implementation Restrictions for Programs Containing Data R
 
 <p>
 A read of an array, struct, or complex number
-may by implemented as a read of each individual sub-value
+may be implemented as a read of each individual sub-value
 (array element, struct field, or real/imaginary component),
 in any order.
 Similarly, a write of an array, struct, or complex number

doc/next/5-toolchain.md

@@ -4,4 +4,9 @@
 
 ## Linker {#linker}
 
+## Bootstrap {#bootstrap}
 
+<!-- go.dev/issue/69315 -->
+As mentioned in the [Go 1.24 release notes](/doc/go1.24#bootstrap), Go 1.26 now requires
+Go 1.24.6 or later for bootstrap.
+We expect that Go 1.28 will require a minor release of Go 1.26 or later for bootstrap.

doc/next/6-stdlib/99-minor/database/sql/driver/67546.md

@@ -0,0 +1 @@
+A database driver may implement [RowsColumnScanner] to entirely override `Scan` behavior.

doc/next/6-stdlib/99-minor/net/49097.md

@@ -0,0 +1 @@
+Added context aware dial functions for TCP, UDP, IP and Unix networks.

doc/next/7-ports.md

@@ -1,2 +1,6 @@
 ## Ports {#ports}
 
+### 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/arch/loong64.go

@@ -23,18 +23,6 @@ func jumpLoong64(word string) bool {
 	return false
 }
 
-// IsLoong64MUL reports whether the op (as defined by an loong64.A* constant) is
-// one of the MUL/DIV/REM instructions that require special handling.
-func IsLoong64MUL(op obj.As) bool {
-	switch op {
-	case loong64.AMUL, loong64.AMULU, loong64.AMULV, loong64.AMULVU,
-		loong64.ADIV, loong64.ADIVU, loong64.ADIVV, loong64.ADIVVU,
-		loong64.AREM, loong64.AREMU, loong64.AREMV, loong64.AREMVU:
-		return true
-	}
-	return false
-}
-
 // IsLoong64RDTIME reports whether the op (as defined by an loong64.A*
 // constant) is one of the RDTIMELW/RDTIMEHW/RDTIMED instructions that
 // require special handling.

src/cmd/asm/internal/asm/asm.go

@@ -974,14 +974,6 @@ func (p *Parser) getConstant(prog *obj.Prog, op obj.As, addr *obj.Addr) int64 {
 	return addr.Offset
 }
 
-// getImmediate checks that addr represents an immediate constant and returns its value.
-func (p *Parser) getImmediate(prog *obj.Prog, op obj.As, addr *obj.Addr) int64 {
-	if addr.Type != obj.TYPE_CONST || addr.Name != 0 || addr.Reg != 0 || addr.Index != 0 {
-		p.errorf("%s: expected immediate constant; found %s", op, obj.Dconv(prog, addr))
-	}
-	return addr.Offset
-}
-
 // getRegister checks that addr represents a register and returns its value.
 func (p *Parser) getRegister(prog *obj.Prog, op obj.As, addr *obj.Addr) int16 {
 	if addr.Type != obj.TYPE_REG || addr.Offset != 0 || addr.Name != 0 || addr.Index != 0 {

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

@@ -376,6 +376,10 @@ lable2:
 	FTINTRNEVF	F0, F2		// 02e41a01
 	FTINTRNEVD	F0, F2		// 02e81a01
 
+	// FSEL instruction
+	FSEL	FCC0, F1, F2, F3	// 4304000d
+	FSEL	FCC1, F1, F2		// 4284000d
+
 	// LDX.{B,BU,H,HU,W,WU,D} instructions
 	MOVB		(R14)(R13), R12	// cc350038
 	MOVBU		(R14)(R13), R12	// cc352038
@@ -510,6 +514,16 @@ lable2:
 	VMOVQ		V3.W[1], V7.W4  // 67e4f772
 	VMOVQ		V4.V[0], V6.V2  // 86f0f772
 
+	// Load data from memory and broadcast to each element of a vector register: VMOVQ    offset(Rj), <Vd>.<T>
+	VMOVQ		(R4), V0.B16	// 80008030
+	VMOVQ		1(R4), V1.H8	// 81044030
+	VMOVQ		2(R4), V2.W4	// 82082030
+	VMOVQ		3(R4), V3.V2	// 830c1030
+	XVMOVQ		(R4), X0.B32	// 80008032
+	XVMOVQ		1(R4), X1.H16	// 81044032
+	XVMOVQ		2(R4), X2.W8	// 82082032
+	XVMOVQ		3(R4), X3.V4	// 830c1032
+
 	// VSEQ{B,H,W,V}, XVSEQ{B,H,W,V} instruction
 	VSEQB		V1, V2, V3      // 43040070
 	VSEQH		V1, V2, V3      // 43840070
@@ -1035,3 +1049,58 @@ lable2:
 	PRELD	(R4), $0		// 8000c02a
 	PRELD	-1(R4), $8		// 88fcff2a
 	PRELD	8(R4),  $31		// 9f20c02a
+
+	// [X]{VBITCLR/VBITSET/VBITREV}{B,H,W,V} instructions
+	VBITCLRB	V1, V2, V3	// 43040c71
+	VBITCLRH	V1, V2, V3	// 43840c71
+	VBITCLRW	V1, V2, V3	// 43040d71
+	VBITCLRV	V1, V2, V3	// 43840d71
+	VBITSETB	V1, V2, V3	// 43040e71
+	VBITSETH	V1, V2, V3	// 43840e71
+	VBITSETW	V1, V2, V3	// 43040f71
+	VBITSETV	V1, V2, V3	// 43840f71
+	VBITREVB	V1, V2, V3	// 43041071
+	VBITREVH	V1, V2, V3	// 43841071
+	VBITREVW	V1, V2, V3	// 43041171
+	VBITREVV	V1, V2, V3	// 43841171
+	XVBITCLRB	X3, X2, X1	// 410c0c75
+	XVBITCLRH	X3, X2, X1	// 418c0c75
+	XVBITCLRW	X3, X2, X1	// 410c0d75
+	XVBITCLRV	X3, X2, X1	// 418c0d75
+	XVBITSETB	X3, X2, X1	// 410c0e75
+	XVBITSETH	X3, X2, X1	// 418c0e75
+	XVBITSETW	X3, X2, X1	// 410c0f75
+	XVBITSETV	X3, X2, X1	// 418c0f75
+	XVBITREVB	X3, X2, X1	// 410c1075
+	XVBITREVH	X3, X2, X1	// 418c1075
+	XVBITREVW	X3, X2, X1	// 410c1175
+	XVBITREVV	X3, X2, X1	// 418c1175
+	VBITCLRB	$7, V2, V3	// 433c1073
+	VBITCLRH	$15, V2, V3	// 437c1073
+	VBITCLRW	$31, V2, V3	// 43fc1073
+	VBITCLRV	$63, V2, V3	// 43fc1173
+	VBITSETB	$7, V2, V3	// 433c1473
+	VBITSETH	$15, V2, V3	// 437c1473
+	VBITSETW	$31, V2, V3	// 43fc1473
+	VBITSETV	$63, V2, V3	// 43fc1573
+	VBITREVB	$7, V2, V3	// 433c1873
+	VBITREVH	$15, V2, V3	// 437c1873
+	VBITREVW	$31, V2, V3	// 43fc1873
+	VBITREVV	$63, V2, V3	// 43fc1973
+	XVBITCLRB	$7, X2, X1	// 413c1077
+	XVBITCLRH	$15, X2, X1	// 417c1077
+	XVBITCLRW	$31, X2, X1	// 41fc1077
+	XVBITCLRV	$63, X2, X1	// 41fc1177
+	XVBITSETB	$7, X2, X1	// 413c1477
+	XVBITSETH	$15, X2, X1	// 417c1477
+	XVBITSETW	$31, X2, X1	// 41fc1477
+	XVBITSETV	$63, X2, X1	// 41fc1577
+	XVBITREVB	$7, X2, X1	// 413c1877
+	XVBITREVH	$15, X2, X1	// 417c1877
+	XVBITREVW	$31, X2, X1	// 41fc1877
+	XVBITREVV	$63, X2, X1	// 41fc1977
+
+	// ALSL{W/WU/D}
+	ALSLW		$4, R4, R5, R6	// 86940500
+	ALSLWU		$4, R4, R5, R6	// 86940700
+	ALSLV		$4, R4, R5, R6	// 86942d00

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

@@ -245,7 +245,7 @@ static void *thread(void *p) {
 	return NULL;
 }
 void testSendSIG() {
-	const int N = 20;
+	enum { N = 20 };
 	int i;
 	pthread_t tid[N];
 	for (i = 0; i < N; i++) {

src/cmd/compile/internal/amd64/ssa.go

@@ -142,45 +142,6 @@ func memIdx(a *obj.Addr, v *ssa.Value) {
 	a.Index = i
 }
 
-// DUFFZERO consists of repeated blocks of 4 MOVUPSs + LEAQ,
-// See runtime/mkduff.go.
-const (
-	dzBlocks    = 16 // number of MOV/ADD blocks
-	dzBlockLen  = 4  // number of clears per block
-	dzBlockSize = 23 // size of instructions in a single block
-	dzMovSize   = 5  // size of single MOV instruction w/ offset
-	dzLeaqSize  = 4  // size of single LEAQ instruction
-	dzClearStep = 16 // number of bytes cleared by each MOV instruction
-)
-
-func duffStart(size int64) int64 {
-	x, _ := duff(size)
-	return x
-}
-func duffAdj(size int64) int64 {
-	_, x := duff(size)
-	return x
-}
-
-// duff returns the offset (from duffzero, in bytes) and pointer adjust (in bytes)
-// required to use the duffzero mechanism for a block of the given size.
-func duff(size int64) (int64, int64) {
-	if size < 32 || size > 1024 || size%dzClearStep != 0 {
-		panic("bad duffzero size")
-	}
-	steps := size / dzClearStep
-	blocks := steps / dzBlockLen
-	steps %= dzBlockLen
-	off := dzBlockSize * (dzBlocks - blocks)
-	var adj int64
-	if steps != 0 {
-		off -= dzLeaqSize
-		off -= dzMovSize * steps
-		adj -= dzClearStep * (dzBlockLen - steps)
-	}
-	return off, adj
-}
-
 func getgFromTLS(s *ssagen.State, r int16) {
 	// See the comments in cmd/internal/obj/x86/obj6.go
 	// near CanUse1InsnTLS for a detailed explanation of these instructions.
@@ -1104,20 +1065,110 @@ func ssaGenValue(s *ssagen.State, v *ssa.Value) {
 			zero16(off + n - 16)
 		}
 
-	case ssa.OpAMD64DUFFCOPY:
-		p := s.Prog(obj.ADUFFCOPY)
-		p.To.Type = obj.TYPE_ADDR
-		p.To.Sym = ir.Syms.Duffcopy
-		if v.AuxInt%16 != 0 {
-			v.Fatalf("bad DUFFCOPY AuxInt %v", v.AuxInt)
+	case ssa.OpAMD64LoweredMove:
+		dstReg := v.Args[0].Reg()
+		srcReg := v.Args[1].Reg()
+		if dstReg == srcReg {
+			break
+		}
+		tmpReg := int16(x86.REG_X14)
+		n := v.AuxInt
+		if n < 16 {
+			v.Fatalf("Move too small %d", n)
+		}
+		// move 16 bytes from srcReg+off to dstReg+off.
+		move16 := func(off int64) {
+			move16(s, srcReg, dstReg, tmpReg, off)
+		}
+
+		// Generate copying instructions.
+		var off int64
+		for n >= 16 {
+			move16(off)
+			off += 16
+			n -= 16
+		}
+		if n != 0 {
+			// use partially overlapped read/write.
+			// TODO: use smaller operations when we can?
+			move16(off + n - 16)
+		}
+
+	case ssa.OpAMD64LoweredMoveLoop:
+		dstReg := v.Args[0].Reg()
+		srcReg := v.Args[1].Reg()
+		if dstReg == srcReg {
+			break
+		}
+		countReg := v.RegTmp()
+		tmpReg := int16(x86.REG_X14)
+		n := v.AuxInt
+		loopSize := int64(64)
+		if n < 3*loopSize {
+			// - a loop count of 0 won't work.
+			// - a loop count of 1 is useless.
+			// - a loop count of 2 is a code size ~tie
+			//     4 instructions to implement the loop
+			//     4 instructions in the loop body
+			//   vs
+			//     8 instructions in the straightline code
+			//   Might as well use straightline code.
+			v.Fatalf("ZeroLoop size too small %d", n)
+		}
+		// move 16 bytes from srcReg+off to dstReg+off.
+		move16 := func(off int64) {
+			move16(s, srcReg, dstReg, tmpReg, off)
+		}
+
+		// Put iteration count in a register.
+		//   MOVL    $n, countReg
+		p := s.Prog(x86.AMOVL)
+		p.From.Type = obj.TYPE_CONST
+		p.From.Offset = n / loopSize
+		p.To.Type = obj.TYPE_REG
+		p.To.Reg = countReg
+		cntInit := p
+
+		// Copy loopSize bytes starting at srcReg to dstReg.
+		for i := range loopSize / 16 {
+			move16(i * 16)
+		}
+		//   ADDQ    $loopSize, srcReg
+		p = s.Prog(x86.AADDQ)
+		p.From.Type = obj.TYPE_CONST
+		p.From.Offset = loopSize
+		p.To.Type = obj.TYPE_REG
+		p.To.Reg = srcReg
+		//   ADDQ    $loopSize, dstReg
+		p = s.Prog(x86.AADDQ)
+		p.From.Type = obj.TYPE_CONST
+		p.From.Offset = loopSize
+		p.To.Type = obj.TYPE_REG
+		p.To.Reg = dstReg
+		//   DECL    countReg
+		p = s.Prog(x86.ADECL)
+		p.To.Type = obj.TYPE_REG
+		p.To.Reg = countReg
+		// Jump to loop header if we're not done yet.
+		//   JNE     head
+		p = s.Prog(x86.AJNE)
+		p.To.Type = obj.TYPE_BRANCH
+		p.To.SetTarget(cntInit.Link)
+
+		// Multiples of the loop size are now done.
+		n %= loopSize
+
+		// Copy any fractional portion.
+		var off int64
+		for n >= 16 {
+			move16(off)
+			off += 16
+			n -= 16
+		}
+		if n != 0 {
+			// Use partially-overlapping copy.
+			move16(off + n - 16)
 		}
-		p.To.Offset = 14 * (64 - v.AuxInt/16)
-		// 14 and 64 are magic constants.  14 is the number of bytes to encode:
-		//	MOVUPS	(SI), X0
-		//	ADDQ	$16, SI
-		//	MOVUPS	X0, (DI)
-		//	ADDQ	$16, DI
-		// and 64 is the number of such blocks. See src/runtime/duff_amd64.s:duffcopy.
 
 	case ssa.OpCopy: // TODO: use MOVQreg for reg->reg copies instead of OpCopy?
 		if v.Type.IsMemory() {
@@ -1709,3 +1760,21 @@ func zero16(s *ssagen.State, reg int16, off int64) {
 	p.To.Reg = reg
 	p.To.Offset = off
 }
+
+// move 16 bytes from src+off to dst+off using temporary register tmp.
+func move16(s *ssagen.State, src, dst, tmp int16, off int64) {
+	//   MOVUPS  off(srcReg), tmpReg
+	//   MOVUPS  tmpReg, off(dstReg)
+	p := s.Prog(x86.AMOVUPS)
+	p.From.Type = obj.TYPE_MEM
+	p.From.Reg = src
+	p.From.Offset = off
+	p.To.Type = obj.TYPE_REG
+	p.To.Reg = tmp
+	p = s.Prog(x86.AMOVUPS)
+	p.From.Type = obj.TYPE_REG
+	p.From.Reg = tmp
+	p.To.Type = obj.TYPE_MEM
+	p.To.Reg = dst
+	p.To.Offset = off
+}