[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

5 files changed, 344 insertions, 4 deletions

diff --git a/test/codegen/append.go b/test/codegen/append.go
new file mode 100644
index 0000000000..0e58a48c45
--- /dev/null
+++ b/test/codegen/append.go
@@ -0,0 +1,190 @@
+// asmcheck
+
+// Copyright 2025 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.
+
+package codegen
+
+func Append1(n int) []int {
+	var r []int
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	// amd64:`.*moveSliceNoCapNoScan`
+	return r
+}
+
+func Append2(n int) (r []int) {
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	// amd64:`.*moveSliceNoCapNoScan`
+	return
+}
+
+func Append3(n int) (r []int) {
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	// amd64:`.*moveSliceNoCapNoScan`
+	return r
+}
+
+func Append4(n int) []int {
+	var r []int
+	for i := range n {
+		// amd64:`.*growsliceBuf`
+		r = append(r, i)
+	}
+	println(cap(r))
+	// amd64:`.*moveSliceNoScan`
+	return r
+}
+
+func Append5(n int) []int {
+	var r []int
+	for i := range n {
+		// amd64:`.*growsliceBuf`
+		r = append(r, i)
+	}
+	useSlice(r)
+	// amd64:`.*moveSliceNoScan`
+	return r
+}
+
+func Append6(n int) []*int {
+	var r []*int
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, new(i))
+	}
+	// amd64:`.*moveSliceNoCap`
+	return r
+}
+
+func Append7(n int) []*int {
+	var r []*int
+	for i := range n {
+		// amd64:`.*growsliceBuf`
+		r = append(r, new(i))
+	}
+	println(cap(r))
+	// amd64:`.*moveSlice`
+	return r
+}
+
+func Append8(n int, p *[]int) {
+	var r []int
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	// amd64:`.*moveSliceNoCapNoScan`
+	*p = r
+}
+
+func Append9(n int) []int {
+	var r []int
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	println(len(r))
+	// amd64:`.*moveSliceNoCapNoScan`
+	return r
+}
+
+func Append10(n int) []int {
+	var r []int
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	println(r[3])
+	// amd64:`.*moveSliceNoCapNoScan`
+	return r
+}
+
+func Append11(n int) []int {
+	var r []int
+	for i := range n {
+		// amd64:`.*growsliceBuf`
+		r = append(r, i)
+	}
+	r = r[3:5]
+	// amd64:`.*moveSliceNoScan`
+	return r
+}
+
+func Append12(n int) []int {
+	var r []int
+	r = nil
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	// amd64:`.*moveSliceNoCapNoScan`
+	return r
+}
+
+func Append13(n int) []int {
+	var r []int
+	r, r = nil, nil
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	// amd64:`.*moveSliceNoCapNoScan`
+	return r
+}
+
+func Append14(n int) []int {
+	var r []int
+	r = []int{3, 4, 5}
+	for i := range n {
+		// amd64:`.*growsliceBuf`
+		r = append(r, i)
+	}
+	// amd64:`.*moveSliceNoScan`
+	return r
+}
+
+func Append15(n int) []int {
+	r := []int{3, 4, 5}
+	for i := range n {
+		// amd64:`.*growsliceBuf`
+		r = append(r, i)
+	}
+	// amd64:`.*moveSliceNoScan`
+	return r
+}
+
+func Append16(r []int, n int) []int {
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	// amd64:`.*moveSliceNoCapNoScan`
+	return r
+}
+
+func Append17(n int) []int {
+	var r []int
+	for i := range n {
+		// amd64:`.*growslice`
+		r = append(r, i)
+	}
+	for i, x := range r {
+		println(i, x)
+	}
+	// amd64:`.*moveSliceNoCapNoScan`
+	return r
+}
+
+//go:noinline
+func useSlice(s []int) {
+}
diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go
index 42d5d2ef65..9443d812dc 100644
--- a/test/codegen/arithmetic.go
+++ b/test/codegen/arithmetic.go
@@ -318,13 +318,28 @@ func MergeMuls5(a, n int) int {
 // Multiplications folded negation
 
 func FoldNegMul(a int) int {
-	// loong64:"SUBVU" "ALSLV [$]2" "ALSLV [$]1"
-	return (-a) * 11
+	// amd64:"IMUL3Q [$]-11" -"NEGQ"
+	// arm64:"MOVD [$]-11" "MUL" -"NEG"
+	// loong64:"ALSLV [$]2" "SUBVU" "ALSLV [$]4"
+	// riscv64:"MOV [$]-11" "MUL" -"NEG"
+	return -a * 11
 }
 
 func Fold2NegMul(a, b int) int {
+	// amd64:"IMULQ" -"NEGQ"
+	// arm64:"MUL" -"NEG"
 	// loong64:"MULV" -"SUBVU R[0-9], R0,"
-	return (-a) * (-b)
+	// riscv64:"MUL" -"NEG"
+	return -a * -b
+}
+
+func Mul32(a, b int32) int64 {
+	// arm64:"SMULL" -"MOVW"
+	return int64(a) * int64(b)
+}
+func Mul32U(a, b uint32) uint64 {
+	// arm64:"UMULL" -"MOVWU"
+	return uint64(a) * uint64(b)
 }
 
 // -------------- //
diff --git a/test/codegen/bool.go b/test/codegen/bool.go
index 37f85a45b7..8fe7a94687 100644
--- a/test/codegen/bool.go
+++ b/test/codegen/bool.go
@@ -313,3 +313,18 @@ func constantWrite(b bool, p *bool) {
 		*p = b
 	}
 }
+
+func boolCompare1(p, q *bool) int {
+	// arm64:-"EOR [$]1"
+	if *p == *q {
+		return 5
+	}
+	return 7
+}
+func boolCompare2(p, q *bool) int {
+	// arm64:-"EOR [$]1"
+	if *p != *q {
+		return 5
+	}
+	return 7
+}
diff --git a/test/codegen/fuse.go b/test/codegen/fuse.go
index 4fbb03bef8..e5a28549dc 100644
--- a/test/codegen/fuse.go
+++ b/test/codegen/fuse.go
@@ -198,6 +198,126 @@ func ui4d(c <-chan uint8) {
 	}
 }
 
+// ------------------------------------ //
+// single bit difference (conjunction)  //
+// ------------------------------------ //
+
+func sisbc64(c <-chan int64) {
+	// amd64: "ORQ [$]2,"
+	// riscv64: "ORI [$]2,"
+	for x := <-c; x != 4 && x != 6; x = <-c {
+	}
+}
+
+func sisbc32(c <-chan int32) {
+	// amd64: "ORL [$]4,"
+	// riscv64: "ORI [$]4,"
+	for x := <-c; x != -1 && x != -5; x = <-c {
+	}
+}
+
+func sisbc16(c <-chan int16) {
+	// amd64: "ORL [$]32,"
+	// riscv64: "ORI [$]32,"
+	for x := <-c; x != 16 && x != 48; x = <-c {
+	}
+}
+
+func sisbc8(c <-chan int8) {
+	// amd64: "ORL [$]16,"
+	// riscv64: "ORI [$]16,"
+	for x := <-c; x != -15 && x != -31; x = <-c {
+	}
+}
+
+func uisbc64(c <-chan uint64) {
+	// amd64: "ORQ [$]4,"
+	// riscv64: "ORI [$]4,"
+	for x := <-c; x != 1 && x != 5; x = <-c {
+	}
+}
+
+func uisbc32(c <-chan uint32) {
+	// amd64: "ORL [$]4,"
+	// riscv64: "ORI [$]4,"
+	for x := <-c; x != 2 && x != 6; x = <-c {
+	}
+}
+
+func uisbc16(c <-chan uint16) {
+	// amd64: "ORL [$]32,"
+	// riscv64: "ORI [$]32,"
+	for x := <-c; x != 16 && x != 48; x = <-c {
+	}
+}
+
+func uisbc8(c <-chan uint8) {
+	// amd64: "ORL [$]64,"
+	// riscv64: "ORI [$]64,"
+	for x := <-c; x != 64 && x != 0; x = <-c {
+	}
+}
+
+// ------------------------------------ //
+// single bit difference (disjunction)  //
+// ------------------------------------ //
+
+func sisbd64(c <-chan int64) {
+	// amd64: "ORQ [$]2,"
+	// riscv64: "ORI [$]2,"
+	for x := <-c; x == 4 || x == 6; x = <-c {
+	}
+}
+
+func sisbd32(c <-chan int32) {
+	// amd64: "ORL [$]4,"
+	// riscv64: "ORI [$]4,"
+	for x := <-c; x == -1 || x == -5; x = <-c {
+	}
+}
+
+func sisbd16(c <-chan int16) {
+	// amd64: "ORL [$]32,"
+	// riscv64: "ORI [$]32,"
+	for x := <-c; x == 16 || x == 48; x = <-c {
+	}
+}
+
+func sisbd8(c <-chan int8) {
+	// amd64: "ORL [$]16,"
+	// riscv64: "ORI [$]16,"
+	for x := <-c; x == -15 || x == -31; x = <-c {
+	}
+}
+
+func uisbd64(c <-chan uint64) {
+	// amd64: "ORQ [$]4,"
+	// riscv64: "ORI [$]4,"
+	for x := <-c; x == 1 || x == 5; x = <-c {
+	}
+}
+
+func uisbd32(c <-chan uint32) {
+	// amd64: "ORL [$]4,"
+	// riscv64: "ORI [$]4,"
+	for x := <-c; x == 2 || x == 6; x = <-c {
+	}
+}
+
+func uisbd16(c <-chan uint16) {
+	// amd64: "ORL [$]32,"
+	// riscv64: "ORI [$]32,"
+	for x := <-c; x == 16 || x == 48; x = <-c {
+	}
+}
+
+func uisbd8(c <-chan uint8) {
+	// amd64: "ORL [$]64,"
+	// riscv64: "ORI [$]64,"
+	for x := <-c; x == 64 || x == 0; x = <-c {
+	}
+}
+
 // -------------------------------------//
 // merge NaN checks                     //
 // ------------------------------------ //
diff --git a/test/codegen/strings.go b/test/codegen/strings.go
index 9d85604395..0c5ee2f8f5 100644
--- a/test/codegen/strings.go
+++ b/test/codegen/strings.go
@@ -23,7 +23,7 @@ func CountBytes(s []byte) int {
 
 func ToByteSlice() []byte { // Issue #24698
 	// amd64:`LEAQ type:\[3\]uint8`
-	// amd64:`CALL runtime\.mallocTiny3`
+	// amd64:`CALL runtime\.(newobject|mallocTiny3)`
 	// amd64:-`.*runtime.stringtoslicebyte`
 	return []byte("foo")
 }