test/codegen/memcombine.go - master - githubmirror/go

test/codegen/memcombine.go
1 517 строк44 KB
Egon Elbre
cmd/compile/internal/amd64: use X15 for 4- and 8-byte zero stores
10 авг 2026, 20:59
10 авг 2026, 20:597ecd909
// asmcheck

// Copyright 2018 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

import (
	"encoding/binary"
	"runtime"
)

// ------------- //
//    Loading    //
// ------------- //

func load_le64(b []byte) uint64 {
	// amd64:`MOVQ \(.*\),` -`MOV[BWL] [^$]` -`OR`
	// riscv64:-`MOV \(X[0-9]+\), X[0-9]+`
	// s390x:`MOVDBR \(.*\),`
	// arm64:`MOVD \(R[0-9]+\),` -`MOV[BHW]`
	// loong64:`MOVV \(R[0-9]+\),`
	// ppc64le:`MOVD ` -`MOV[BHW]Z`
	// ppc64:`MOVDBR ` -`MOV[BHW]Z`
	return binary.LittleEndian.Uint64(b)
}

func load_le64_idx(b []byte, idx int) uint64 {
	// amd64:`MOVQ \(.*\)\(.*\*1\),` -`MOV[BWL] [^$]` -`OR`
	// s390x:`MOVDBR \(.*\)\(.*\*1\),`
	// arm64:`MOVD \(R[0-9]+\)\(R[0-9]+\),` -`MOV[BHW]`
	// loong64:`MOVV \(R[0-9]+\)\(R[0-9]+\),`
	// ppc64le:`MOVD ` -`MOV[BHW]Z `
	// ppc64:`MOVDBR ` -`MOV[BHW]Z `
	return binary.LittleEndian.Uint64(b[idx:])
}

func load_le32(b []byte) uint32 {
	// amd64:`MOVL \(.*\),` -`MOV[BW]` -`OR`
	// 386:`MOVL \(.*\),` -`MOV[BW]` -`OR`
	// s390x:`MOVWBR \(.*\),`
	// arm64:`MOVWU \(R[0-9]+\),` -`MOV[BH]`
	// loong64:`MOVWU \(R[0-9]+\),`
	// ppc64le:`MOVWZ ` -`MOV[BH]Z `
	// ppc64:`MOVWBR ` -`MOV[BH]Z `
	return binary.LittleEndian.Uint32(b)
}

func load_le32_idx(b []byte, idx int) uint32 {
	// amd64:`MOVL \(.*\)\(.*\*1\),` -`MOV[BW]` -`OR`
	// 386:`MOVL \(.*\)\(.*\*1\),` -`MOV[BW]` -`OR`
	// s390x:`MOVWBR \(.*\)\(.*\*1\),`
	// arm64:`MOVWU \(R[0-9]+\)\(R[0-9]+\),` -`MOV[BH]`
	// loong64:`MOVWU \(R[0-9]+\)\(R[0-9]+\),`
	// ppc64le:`MOVWZ ` -`MOV[BH]Z `
	// ppc64:`MOVWBR ` -`MOV[BH]Z `
	return binary.LittleEndian.Uint32(b[idx:])
}

func load_le16(b []byte) uint16 {
	// amd64:`MOVWLZX \(.*\),` -`MOVB` -`OR`
	// ppc64le:`MOVHZ ` -`MOVBZ`
	// arm64:`MOVHU \(R[0-9]+\),` -`MOVB`
	// loong64:`MOVHU \(R[0-9]+\),`
	// s390x:`MOVHBR \(.*\),`
	// ppc64:`MOVHBR ` -`MOVBZ`
	return binary.LittleEndian.Uint16(b)
}

func load_le16_idx(b []byte, idx int) uint16 {
	// amd64:`MOVWLZX \(.*\),` -`MOVB` -`OR`
	// ppc64le:`MOVHZ ` -`MOVBZ`
	// ppc64:`MOVHBR ` -`MOVBZ`
	// arm64:`MOVHU \(R[0-9]+\)\(R[0-9]+\),` -`MOVB`
	// loong64:`MOVHU \(R[0-9]+\)\(R[0-9]+\),`
	// s390x:`MOVHBR \(.*\)\(.*\*1\),`
	return binary.LittleEndian.Uint16(b[idx:])
}

func load_be64(b []byte) uint64 {
	// amd64/v1,amd64/v2:`BSWAPQ` -`MOV[BWL] [^$]` -`OR`
	// amd64/v3:`MOVBEQ`
	// s390x:`MOVD \(.*\),`
	// arm64:`REV` `MOVD \(R[0-9]+\),` -`MOV[BHW]` -`REVW` -`REV16W`
	// ppc64le:`MOVDBR` -`MOV[BHW]Z`
	// ppc64:`MOVD` -`MOV[BHW]Z`
	return binary.BigEndian.Uint64(b)
}

func load_be64_idx(b []byte, idx int) uint64 {
	// amd64/v1,amd64/v2:`BSWAPQ` -`MOV[BWL] [^$]` -`OR`
	// amd64/v3: `MOVBEQ \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\), [A-Z]+[0-9]*`
	// s390x:`MOVD \(.*\)\(.*\*1\),`
	// arm64:`REV` `MOVD \(R[0-9]+\)\(R[0-9]+\),` -`MOV[WHB]` -`REVW` -`REV16W`
	// ppc64le:`MOVDBR` -`MOV[BHW]Z`
	// ppc64:`MOVD` -`MOV[BHW]Z`
	return binary.BigEndian.Uint64(b[idx:])
}

func load_be32(b []byte) uint32 {
	// amd64/v1,amd64/v2:`BSWAPL` -`MOV[BW]` -`OR`
	// amd64/v3: `MOVBEL`
	// s390x:`MOVWZ \(.*\),`
	// arm64:`REVW` `MOVWU \(R[0-9]+\),` -`MOV[BH]` -`REV16W`
	// ppc64le:`MOVWBR` -`MOV[BH]Z`
	// ppc64:`MOVWZ` -`MOV[BH]Z`
	return binary.BigEndian.Uint32(b)
}

func load_be32_idx(b []byte, idx int) uint32 {
	// amd64/v1,amd64/v2:`BSWAPL` -`MOV[BW]` -`OR`
	// amd64/v3: `MOVBEL \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\), [A-Z]+[0-9]*`
	// s390x:`MOVWZ \(.*\)\(.*\*1\),`
	// arm64:`REVW` `MOVWU \(R[0-9]+\)\(R[0-9]+\),` -`MOV[HB]` -`REV16W`
	// ppc64le:`MOVWBR` -`MOV[BH]Z`
	// ppc64:`MOVWZ` -`MOV[BH]Z`
	return binary.BigEndian.Uint32(b[idx:])
}

func load_be16(b []byte) uint16 {
	// amd64:`ROLW \$8` -`MOVB` -`OR`
	// arm64:`REV16W` `MOVHU \(R[0-9]+\),` -`MOVB`
	// ppc64le:`MOVHBR` -`MOVBZ`
	// ppc64:`MOVHZ` -`MOVBZ`
	// s390x:`MOVHZ \(.*\),` -`OR` -`ORW` -`SLD` -`SLW`
	return binary.BigEndian.Uint16(b)
}

func load_be16_idx(b []byte, idx int) uint16 {
	// amd64:`ROLW \$8` -`MOVB` -`OR`
	// arm64:`REV16W` `MOVHU \(R[0-9]+\)\(R[0-9]+\),` -`MOVB`
	// ppc64le:`MOVHBR` -`MOVBZ`
	// ppc64:`MOVHZ` -`MOVBZ`
	// s390x:`MOVHZ \(.*\)\(.*\*1\),` -`OR` -`ORW` -`SLD` -`SLW`
	return binary.BigEndian.Uint16(b[idx:])
}

func load_le_byte2_uint16(s []byte) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)` -`ORR` -`MOVB`
	// 386:`MOVWLZX \([A-Z]+\)` -`MOVB` -`OR`
	// amd64:`MOVWLZX \([A-Z]+\)` -`MOVB` -`OR`
	// ppc64le:`MOVHZ \(R[0-9]+\)` -`MOVBZ`
	// ppc64:`MOVHBR` -`MOVBZ`
	return uint16(s[0]) | uint16(s[1])<<8
}

func load_le_byte2_uint16_inv(s []byte) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)` -`ORR` -`MOVB`
	// 386:`MOVWLZX \([A-Z]+\)` -`MOVB` -`OR`
	// amd64:`MOVWLZX \([A-Z]+\)` -`MOVB` -`OR`
	// ppc64le:`MOVHZ \(R[0-9]+\)` -`MOVBZ`
	// ppc64:`MOVHBR` -`MOVBZ`
	return uint16(s[1])<<8 | uint16(s[0])
}

func load_le_byte4_uint32(s []byte) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)` -`ORR` -`MOV[BH]`
	// 386:`MOVL \([A-Z]+\)` -`MOV[BW]` -`OR`
	// amd64:`MOVL \([A-Z]+\)` -`MOV[BW]` -`OR`
	// ppc64le:`MOVWZ \(R[0-9]+\)` -`MOV[BH]Z`
	// ppc64:`MOVWBR` -`MOV[BH]Z`
	return uint32(s[0]) | uint32(s[1])<<8 | uint32(s[2])<<16 | uint32(s[3])<<24
}

func load_le_byte4_uint32_inv(s []byte) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)` -`ORR` -`MOV[BH]`
	// ppc64le:`MOVWZ` -`MOV[BH]Z`
	// ppc64:`MOVWBR` -`MOV[BH]Z`
	return uint32(s[3])<<24 | uint32(s[2])<<16 | uint32(s[1])<<8 | uint32(s[0])
}

func load_le_byte8_uint64(s []byte) uint64 {
	// arm64:`MOVD \(R[0-9]+\)` -`ORR` -`MOV[BHW]`
	// amd64:`MOVQ \([A-Z]+\), [A-Z]+` -`MOV[BWL] [^$]` -`OR`
	// ppc64le:`MOVD \(R[0-9]+\)` -`MOV[BHW]Z`
	// ppc64:`MOVDBR` -`MOVW[WHB]Z`
	return uint64(s[0]) | uint64(s[1])<<8 | uint64(s[2])<<16 | uint64(s[3])<<24 | uint64(s[4])<<32 | uint64(s[5])<<40 | uint64(s[6])<<48 | uint64(s[7])<<56
}

func load_le_byte8_uint64_inv(s []byte) uint64 {
	// arm64:`MOVD \(R[0-9]+\)` -`ORR` -`MOV[BHW]`
	// ppc64le:`MOVD` -`MOV[WHB]Z`
	// ppc64:`MOVDBR` -`MOV[WHB]Z`
	return uint64(s[7])<<56 | uint64(s[6])<<48 | uint64(s[5])<<40 | uint64(s[4])<<32 | uint64(s[3])<<24 | uint64(s[2])<<16 | uint64(s[1])<<8 | uint64(s[0])
}

type memCombineAligned struct {
	x uint64
	b [16]byte
}

func load_le_byte8_uint64_aligned(s *memCombineAligned) uint64 {
	// riscv64:`MOV 8\(X[0-9]+\), X[0-9]+` -`MOVBU` -`OR`
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_aligned_offset1(s *memCombineAligned) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[1:])
}

func load_le_byte8_uint64_aligned_offset2(s *memCombineAligned) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[2:])
}

func load_le_byte8_uint64_aligned_offset3(s *memCombineAligned) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[3:])
}

func load_le_byte8_uint64_aligned_offset4(s *memCombineAligned) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[4:])
}

func load_le_byte8_uint64_aligned_offset5(s *memCombineAligned) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[5:])
}

func load_le_byte8_uint64_aligned_offset6(s *memCombineAligned) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[6:])
}

func load_le_byte8_uint64_aligned_offset7(s *memCombineAligned) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[7:])
}

func load_le_byte8_uint64_aligned_offset8(s *memCombineAligned) uint64 {
	// riscv64:`MOV 16\(X[0-9]+\), X[0-9]+` -`MOVBU` -`OR`
	return binary.LittleEndian.Uint64(s.b[8:])
}

func load_le_byte4_uint32_aligned(s *memCombineAligned) uint32 {
	// riscv64:`MOVWU 8\(X[0-9]+\), X[0-9]+` -`MOVBU` -`OR`
	return binary.LittleEndian.Uint32(s.b[:])
}

func load_le_byte4_uint32_aligned_offset2(s *memCombineAligned) uint32 {
	// riscv64:`MOVBU` -`MOVWU`
	return binary.LittleEndian.Uint32(s.b[2:])
}

func load_le_byte4_uint32_aligned_offset4(s *memCombineAligned) uint32 {
	// riscv64:`MOVWU 12\(X[0-9]+\), X[0-9]+` -`MOVBU` -`OR`
	return binary.LittleEndian.Uint32(s.b[4:])
}

func load_le_byte2_uint16_aligned(s *memCombineAligned) uint16 {
	// riscv64:`MOVHU 8\(X[0-9]+\), X[0-9]+` -`MOVBU` -`OR`
	return binary.LittleEndian.Uint16(s.b[:])
}

func load_le_byte2_uint16_aligned_offset1(s *memCombineAligned) uint16 {
	// riscv64:`MOVBU` -`MOVHU`
	return binary.LittleEndian.Uint16(s.b[1:])
}

type memCombineUnaligned08 struct {
	x byte
	_ [0]byte
	b [8]byte
}

type memCombineUnaligned18 struct {
	x byte
	_ [1]byte
	b [8]byte
}

type memCombineUnaligned28 struct {
	x byte
	_ [2]byte
	b [8]byte
}

type memCombineUnaligned38 struct {
	x byte
	_ [3]byte
	b [8]byte
}

type memCombineUnaligned48 struct {
	x byte
	_ [4]byte
	b [8]byte
}

type memCombineUnaligned58 struct {
	x byte
	_ [5]byte
	b [8]byte
}

type memCombineUnaligned68 struct {
	x byte
	_ [6]byte
	b [8]byte
}

type memCombineUnaligned78 struct {
	x byte
	_ [7]byte
	b [8]byte
}

type memCombineUnaligned88 struct {
	x byte
	_ [8]byte
	b [8]byte
}

type memCombineUnaligned16 struct {
	x byte
	b [16]byte
}

func load_le_byte8_uint64_unaligned_offset0(s *memCombineUnaligned08) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_unaligned_offset1(s *memCombineUnaligned18) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_unaligned_offset2(s *memCombineUnaligned28) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_unaligned_offset3(s *memCombineUnaligned38) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_unaligned_offset4(s *memCombineUnaligned48) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_unaligned_offset5(s *memCombineUnaligned58) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_unaligned_offset6(s *memCombineUnaligned68) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_unaligned_offset7(s *memCombineUnaligned78) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_unaligned_offset8(s *memCombineUnaligned88) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[:])
}

func load_le_byte8_uint64_unaligned_slice_offset1(s *memCombineUnaligned16) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[1:])
}

func load_le_byte8_uint64_unaligned_slice_offset2(s *memCombineUnaligned16) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[2:])
}

func load_le_byte8_uint64_unaligned_slice_offset3(s *memCombineUnaligned16) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[3:])
}

func load_le_byte8_uint64_unaligned_slice_offset4(s *memCombineUnaligned16) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[4:])
}

func load_le_byte8_uint64_unaligned_slice_offset5(s *memCombineUnaligned16) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[5:])
}

func load_le_byte8_uint64_unaligned_slice_offset6(s *memCombineUnaligned16) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[6:])
}

func load_le_byte8_uint64_unaligned_slice_offset7(s *memCombineUnaligned16) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[7:])
}

func load_le_byte8_uint64_unaligned_slice_offset8(s *memCombineUnaligned16) uint64 {
	// riscv64:`MOVBU` -`MOV `
	return binary.LittleEndian.Uint64(s.b[8:])
}

func load_be_byte2_uint16(s []byte) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)` `REV16W` -`ORR` -`MOVB`
	// amd64:`MOVWLZX \([A-Z]+\)` `ROLW` -`MOVB` -`OR`
	// ppc64le:`MOVHBR \(R[0-9]+\)` -`MOVBZ`
	// ppc64:`MOVHZ` -`MOVBZ`
	return uint16(s[0])<<8 | uint16(s[1])
}

func load_be_byte2_uint16_inv(s []byte) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)` `REV16W` -`ORR` -`MOVB`
	// amd64:`MOVWLZX \([A-Z]+\)` `ROLW` -`MOVB` -`OR`
	// ppc64le:`MOVHBR \(R[0-9]+\)` -`MOVBZ`
	// ppc64:`MOVHZ` -`MOVBZ`
	return uint16(s[1]) | uint16(s[0])<<8
}

func load_be_byte4_uint32(s []byte) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)` `REVW` -`ORR` -`REV16W` -`MOV[BH]`
	// ppc64le:`MOVWBR` -`MOV[HB]Z`
	// ppc64:`MOVWZ` -`MOV[HB]Z`
	return uint32(s[0])<<24 | uint32(s[1])<<16 | uint32(s[2])<<8 | uint32(s[3])
}

func load_be_byte4_uint32_inv(s []byte) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)` `REVW` -`ORR` -`REV16W` -`MOV[BH]`
	// amd64/v1,amd64/v2:`MOVL \([A-Z]+\)` `BSWAPL` -`MOV[BW]` -`OR`
	// amd64/v3: `MOVBEL`
	// ppc64le:`MOVWBR` -`MOV[HB]Z`
	// ppc64:`MOVWZ` -`MOV[HB]Z`
	return uint32(s[3]) | uint32(s[2])<<8 | uint32(s[1])<<16 | uint32(s[0])<<24
}

func load_be_byte8_uint64(s []byte) uint64 {
	// arm64:`MOVD \(R[0-9]+\)` `REV` -`ORR` -`REVW` -`REV16W` -`MOV[BHW]`
	// ppc64le:`MOVDBR \(R[0-9]+\)` -`MOV[BHW]Z`
	// ppc64:`MOVD` -`MOV[WHB]Z`
	return uint64(s[0])<<56 | uint64(s[1])<<48 | uint64(s[2])<<40 | uint64(s[3])<<32 | uint64(s[4])<<24 | uint64(s[5])<<16 | uint64(s[6])<<8 | uint64(s[7])
}

func load_be_byte8_uint64_inv(s []byte) uint64 {
	// arm64:`MOVD \(R[0-9]+\)` `REV` -`ORR` -`REVW` -`REV16W` -`MOV[BHW]`
	// amd64/v1,amd64/v2:`MOVQ \([A-Z]+\), [A-Z]+` `BSWAPQ` -`MOV[BWL] [^$]` -`OR`
	// amd64/v3: `MOVBEQ`
	// ppc64le:`MOVDBR \(R[0-9]+\)` -`MOV[BHW]Z`
	// ppc64:`MOVD` -`MOV[BHW]Z`
	return uint64(s[7]) | uint64(s[6])<<8 | uint64(s[5])<<16 | uint64(s[4])<<24 | uint64(s[3])<<32 | uint64(s[2])<<40 | uint64(s[1])<<48 | uint64(s[0])<<56
}

func load_le_byte2_uint16_idx(s []byte, idx int) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)\(R[0-9]+\)` -`ORR` -`MOVB`
	// 386:`MOVWLZX \([A-Z]+\)\([A-Z]+` -`ORL` -`MOVB`
	// amd64:`MOVWLZX \([A-Z]+\)\([A-Z]+` -`MOVB` -`OR`
	// ppc64le:`MOVHZ` -`MOVBZ`
	// ppc64:`MOVHBR` -`MOVBZ`
	return uint16(s[idx]) | uint16(s[idx+1])<<8
}

func load_le_byte2_uint16_idx_inv(s []byte, idx int) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)\(R[0-9]+\)` -`ORR` -`MOVB`
	// 386:`MOVWLZX \([A-Z]+\)\([A-Z]+` -`ORL` -`MOVB`
	// amd64:`MOVWLZX \([A-Z]+\)\([A-Z]+` -`MOVB` -`OR`
	// ppc64le:`MOVHZ` -`MOVBZ`
	// ppc64:`MOVHBR` -`MOVBZ`
	return uint16(s[idx+1])<<8 | uint16(s[idx])
}

func load_le_byte4_uint32_idx(s []byte, idx int) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)\(R[0-9]+\)` -`ORR` -`MOV[BH]`
	// amd64:`MOVL \([A-Z]+\)\([A-Z]+` -`MOV[BW]` -`OR`
	return uint32(s[idx]) | uint32(s[idx+1])<<8 | uint32(s[idx+2])<<16 | uint32(s[idx+3])<<24
}

func load_le_byte4_uint32_idx_inv(s []byte, idx int) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)\(R[0-9]+\)` -`ORR` -`MOV[BH]`
	return uint32(s[idx+3])<<24 | uint32(s[idx+2])<<16 | uint32(s[idx+1])<<8 | uint32(s[idx])
}

func load_le_byte8_uint64_idx(s []byte, idx int) uint64 {
	// arm64:`MOVD \(R[0-9]+\)\(R[0-9]+\)` -`ORR` -`MOV[BHW]`
	// amd64:`MOVQ \([A-Z]+\)\([A-Z]+` -`MOV[BWL]` -`OR`
	return uint64(s[idx]) | uint64(s[idx+1])<<8 | uint64(s[idx+2])<<16 | uint64(s[idx+3])<<24 | uint64(s[idx+4])<<32 | uint64(s[idx+5])<<40 | uint64(s[idx+6])<<48 | uint64(s[idx+7])<<56
}

func load_le_byte8_uint64_idx_inv(s []byte, idx int) uint64 {
	// arm64:`MOVD \(R[0-9]+\)\(R[0-9]+\)` -`ORR` -`MOV[BHW]`
	return uint64(s[idx+7])<<56 | uint64(s[idx+6])<<48 | uint64(s[idx+5])<<40 | uint64(s[idx+4])<<32 | uint64(s[idx+3])<<24 | uint64(s[idx+2])<<16 | uint64(s[idx+1])<<8 | uint64(s[idx])
}

func load_be_byte2_uint16_idx(s []byte, idx int) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)\(R[0-9]+\)` `REV16W` -`ORR` -`MOVB`
	// amd64:`MOVWLZX \([A-Z]+\)\([A-Z]+` -`MOVB` -`OR`
	return uint16(s[idx])<<8 | uint16(s[idx+1])
}

func load_be_byte2_uint16_idx_inv(s []byte, idx int) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)\(R[0-9]+\)` `REV16W` -`ORR` -`MOVB`
	// amd64:`MOVWLZX \([A-Z]+\)\([A-Z]+` -`MOVB` -`OR`
	return uint16(s[idx+1]) | uint16(s[idx])<<8
}

func load_be_byte4_uint32_idx(s []byte, idx int) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)\(R[0-9]+\)` `REVW` -`ORR` -`MOV[BH]` -`REV16W`
	return uint32(s[idx])<<24 | uint32(s[idx+1])<<16 | uint32(s[idx+2])<<8 | uint32(s[idx+3])
}

func load_be_byte8_uint64_idx(s []byte, idx int) uint64 {
	// arm64:`MOVD \(R[0-9]+\)\(R[0-9]+\)` `REV` -`ORR` -`MOV[BHW]` -`REVW` -`REV16W`
	return uint64(s[idx])<<56 | uint64(s[idx+1])<<48 | uint64(s[idx+2])<<40 | uint64(s[idx+3])<<32 | uint64(s[idx+4])<<24 | uint64(s[idx+5])<<16 | uint64(s[idx+6])<<8 | uint64(s[idx+7])
}

func load_le_byte2_uint16_idx2(s []byte, idx int) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)\(R[0-9]+<<1\)` -`ORR` -`MOVB`
	return uint16(s[idx<<1]) | uint16(s[(idx<<1)+1])<<8
}

func load_le_byte2_uint16_idx2_inv(s []byte, idx int) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)\(R[0-9]+<<1\)` -`ORR` -`MOVB`
	return uint16(s[(idx<<1)+1])<<8 | uint16(s[idx<<1])
}

func load_le_byte4_uint32_idx4(s []byte, idx int) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)\(R[0-9]+<<2\)` -`ORR` -`MOV[BH]`
	return uint32(s[idx<<2]) | uint32(s[(idx<<2)+1])<<8 | uint32(s[(idx<<2)+2])<<16 | uint32(s[(idx<<2)+3])<<24
}

func load_le_byte4_uint32_idx4_inv(s []byte, idx int) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)\(R[0-9]+<<2\)` -`ORR` -`MOV[BH]`
	return uint32(s[(idx<<2)+3])<<24 | uint32(s[(idx<<2)+2])<<16 | uint32(s[(idx<<2)+1])<<8 | uint32(s[idx<<2])
}

func load_le_byte8_uint64_idx8(s []byte, idx int) uint64 {
	// arm64:`MOVD \(R[0-9]+\)\(R[0-9]+<<3\)` -`ORR` -`MOV[BHW]`
	return uint64(s[idx<<3]) | uint64(s[(idx<<3)+1])<<8 | uint64(s[(idx<<3)+2])<<16 | uint64(s[(idx<<3)+3])<<24 | uint64(s[(idx<<3)+4])<<32 | uint64(s[(idx<<3)+5])<<40 | uint64(s[(idx<<3)+6])<<48 | uint64(s[(idx<<3)+7])<<56
}

func load_le_byte8_uint64_idx8_inv(s []byte, idx int) uint64 {
	// arm64:`MOVD \(R[0-9]+\)\(R[0-9]+<<3\)` -`ORR` -`MOV[BHW]`
	return uint64(s[(idx<<3)+7])<<56 | uint64(s[(idx<<3)+6])<<48 | uint64(s[(idx<<3)+5])<<40 | uint64(s[(idx<<3)+4])<<32 | uint64(s[(idx<<3)+3])<<24 | uint64(s[(idx<<3)+2])<<16 | uint64(s[(idx<<3)+1])<<8 | uint64(s[idx<<3])
}

func load_be_byte2_uint16_idx2(s []byte, idx int) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)\(R[0-9]+<<1\)` `REV16W` -`ORR` -`MOVB`
	return uint16(s[idx<<1])<<8 | uint16(s[(idx<<1)+1])
}

func load_be_byte2_uint16_idx2_inv(s []byte, idx int) uint16 {
	// arm64:`MOVHU \(R[0-9]+\)\(R[0-9]+<<1\)` `REV16W` -`ORR` -`MOVB`
	return uint16(s[(idx<<1)+1]) | uint16(s[idx<<1])<<8
}

func load_be_byte4_uint32_idx4(s []byte, idx int) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)\(R[0-9]+<<2\)` `REVW` -`ORR` -`MOV[BH]` -`REV16W`
	return uint32(s[idx<<2])<<24 | uint32(s[(idx<<2)+1])<<16 | uint32(s[(idx<<2)+2])<<8 | uint32(s[(idx<<2)+3])
}

func load_be_byte8_uint64_idx8(s []byte, idx int) uint64 {
	// arm64:`MOVD \(R[0-9]+\)\(R[0-9]+<<3\)` `REV` -`ORR` -`MOV[BHW]` -`REVW` -`REV16W`
	return uint64(s[idx<<3])<<56 | uint64(s[(idx<<3)+1])<<48 | uint64(s[(idx<<3)+2])<<40 | uint64(s[(idx<<3)+3])<<32 | uint64(s[(idx<<3)+4])<<24 | uint64(s[(idx<<3)+5])<<16 | uint64(s[(idx<<3)+6])<<8 | uint64(s[(idx<<3)+7])
}

// Check combining of different int types

func load_le_2uint16_uint32(s []uint16) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)` -`ORR` -`MOVHU`
	// 386:`MOVL \([A-Z]+\)` -`MOVWLZX` -`ORL`
	// amd64:`MOVL \([A-Z]+\)` -`MOVWLZX` -`ORL`
	// ppc64le:`MOVWZ \(R[0-9]+\)` -`MOVHZ`
	return uint32(s[0]) | uint32(s[1])<<16
}

func load_le_2uint16_uint32_idx(s []uint16, idx int) uint32 {
	// arm64:`MOVWU \(R[0-9]+\)` -`ORR` -`MOVHU`
	// 386:`MOVL \([A-Z]+\)` -`MOVWLZX` -`ORL`
	// amd64:`MOVL \([A-Z]+\)` -`MOVWLZX` -`ORL`
	// ppc64le:`MOVWZ \(R[0-9]+\)` -`MOVHZ`
	return uint32(s[idx]) | uint32(s[idx+1])<<16
}

func load_le_4uint16_uint64(s []uint16) uint64 {
	// arm64:`MOVD \(R[0-9]+\)` -`ORR` -`MOVHU`
	// amd64:`MOVQ \([A-Z]+\)` -`ORQ` -`MOVWLZX`
	// ppc64le:`MOVD \(R[0-9]+\)` -`MOVHZ`
	return uint64(s[0]) | uint64(s[1])<<16 | uint64(s[2])<<32 | uint64(s[3])<<48
}

func load_le_4uint16_uint64_idx(s []uint16, idx int) uint64 {
	// arm64:`MOVD \(R[0-9]+\)` -`ORR` -`MOVHU`
	// amd64:`MOVQ \([A-Z]+\)` -`ORQ` -`MOVWLZX`
	// ppc64le:`MOVD \(R[0-9]+\)` -`MOVHZ`
	return uint64(s[idx]) | uint64(s[idx+1])<<16 | uint64(s[idx+2])<<32 | uint64(s[idx+3])<<48
}

func load_le_2uint32_uint64(s []uint32) uint64 {
	// arm64:`MOVD \(R[0-9]+\)` -`ORR` -`LDPW` -`MOVWU`
	// amd64:`MOVQ \([A-Z]+\)` -`ORQ` -`MOVL`
	// ppc64le:`MOVD \(R[0-9]+\)` -`MOVWZ`
	return uint64(s[0]) | uint64(s[1])<<32
}

func load_le_2uint32_uint64_idx(s []uint32, idx int) uint64 {
	// arm64:`MOVD \(R[0-9]+\)` -`ORR` -`LDPW` -`MOVWU`
	// amd64:`MOVQ \([A-Z]+\)` -`ORQ` -`MOVL`
	// ppc64le:`MOVD \(R[0-9]+\)` -`MOVWZ`
	return uint64(s[idx]) | uint64(s[idx+1])<<32
}

// Some tougher cases for the memcombine pass.

func reassoc_load_uint32(b []byte) uint32 {
	// amd64:`MOVL \([A-Z]+\)` -`MOV[BW]` -`OR`
	return (uint32(b[0]) | uint32(b[1])<<8) | (uint32(b[2])<<16 | uint32(b[3])<<24)
}

func extrashift_load_uint32(b []byte) uint32 {
	// amd64:`MOVL \([A-Z]+\)` `SHLL [$]2` -`MOV[BW]` -`OR`
	return uint32(b[0])<<2 | uint32(b[1])<<10 | uint32(b[2])<<18 | uint32(b[3])<<26
}

func outoforder_load_uint32(b []byte) uint32 {
	// amd64:`MOVL \([A-Z]+\)` -`MOV[BW]` -`OR`
	return uint32(b[0]) | uint32(b[2])<<16 | uint32(b[1])<<8 | uint32(b[3])<<24
}

func extraOr_load_uint32(b []byte, x, y uint32) uint32 {
	// amd64:`ORL \([A-Z]+\)` -`MOV[BW]`
	return x | binary.LittleEndian.Uint32(b) | y
	// TODO: Note that
	//   x | uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 | y
	// doesn't work because it associates in a way that memcombine can't detect it.
}

// Check load combining across function calls.

func fcall_byte(a [2]byte) [2]byte {
	return fcall_byte(fcall_byte(a)) // amd64:`MOVW`
}

func fcall_uint16(a [2]uint16) [2]uint16 {
	return fcall_uint16(fcall_uint16(a)) // amd64:`MOVL`
}

func fcall_uint32(a [2]uint32) [2]uint32 {
	return fcall_uint32(fcall_uint32(a)) // amd64:`MOVQ`
}

// We want to merge load+op in the first function, but not in the
// second. See Issue 19595.
func load_op_merge(p, q *int) {
	x := *p // amd64:`ADDQ \(`
	*q += x // The combined nilcheck and load would normally have this line number, but we want that combined operation to have the line number of the nil check instead (see #33724).
}
func load_op_no_merge(p, q *int) {
	x := *p
	for i := 0; i < 10; i++ {
		*q += x // amd64:`ADDQ [A-Z]`
	}
}

func load_op_in_loop(a []int) int {
	r := 0
	for _, x := range a {
		// amd64:`ADDQ \([A-Z]+\)\([A-Z]+\*8\), [A-Z]+`
		r += x
	}
	return r
}

// Make sure offsets are folded into loads and stores.
func offsets_fold(_, a [20]byte) (b [20]byte) {
	// arm64:`MOVD command-line-arguments\.a\+[0-9]+\(FP\), R[0-9]+` `MOVD R[0-9]+, command-line-arguments\.b\+[0-9]+\(FP\)`
	b = a
	return
}

// Make sure we don't put pointers in SSE registers across safe
// points.

func safe_point(p, q *[2]*int) {
	a, b := p[0], p[1] // amd64:-`MOVUPS`
	runtime.GC()
	q[0], q[1] = a, b // amd64:-`MOVUPS`
}

// ------------- //
//    Storing    //
// ------------- //

func store_le64(b []byte, x uint64) {
	// amd64:`MOVQ .*\(.*\)$` -`SHR.`
	// arm64:`MOVD` -`MOV[WBH]`
	// ppc64le:`MOVD ` -`MOV[BHW] `
	// ppc64:`MOVDBR` -`MOVB `
	// s390x:`MOVDBR .*\(.*\)$`
	binary.LittleEndian.PutUint64(b, x)
}

func store_le64_idx(b []byte, x uint64, idx int) {
	// amd64:`MOVQ .*\(.*\)\(.*\*1\)$` -`SHR.`
	// arm64:`MOVD R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` -`MOV[BHW]`
	// ppc64le:`MOVD ` -`MOV[BHW] `
	// ppc64:`MOVDBR` -`MOVBZ`
	// s390x:`MOVDBR .*\(.*\)\(.*\*1\)$`
	binary.LittleEndian.PutUint64(b[idx:], x)
}

func store_le64_idx2(dst []byte, d, length, offset int) []byte {
	a := dst[d : d+length]
	b := dst[d-offset:]
	// amd64:`MOVQ .*\(.*\)\(.*\*1\)$` -`SHR.`
	binary.LittleEndian.PutUint64(a, binary.LittleEndian.Uint64(b))
	return dst
}

func store_le64_idx_const(b []byte, idx int) {
	// amd64:`MOVQ \$123, \(.*\)\(.*\*1\)$`
	binary.LittleEndian.PutUint64(b[idx:], 123)
}

func store_le64_load(b []byte, x *[8]byte) {
	_ = b[8]
	// amd64:-`MOV[BWL]`
	// arm64:-`MOV[BWH]`
	// ppc64le:`MOVD ` -`MOV[BWH]Z`
	// ppc64:`MOVDBR`
	// s390x:-`MOVB` -`MOV[WH]BR`
	binary.LittleEndian.PutUint64(b, binary.LittleEndian.Uint64(x[:]))
}

func store_le_byte8_uint64_aligned(s *memCombineAligned, x uint64) {
	// riscv64:`MOV X[0-9]+, 8\(X[0-9]+\)` -`MOVB`
	binary.LittleEndian.PutUint64(s.b[:], x)
}

func store_le_byte8_uint64_aligned_offset1(s *memCombineAligned, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[1:], x)
}

func store_le_byte8_uint64_aligned_offset2(s *memCombineAligned, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[2:], x)
}

func store_le_byte8_uint64_aligned_offset3(s *memCombineAligned, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[3:], x)
}

func store_le_byte8_uint64_aligned_offset4(s *memCombineAligned, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[4:], x)
}

func store_le_byte8_uint64_aligned_offset5(s *memCombineAligned, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[5:], x)
}

func store_le_byte8_uint64_aligned_offset6(s *memCombineAligned, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[6:], x)
}

func store_le_byte8_uint64_aligned_offset7(s *memCombineAligned, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[7:], x)
}

func store_le_byte8_uint64_aligned_offset8(s *memCombineAligned, x uint64) {
	// riscv64:`MOV X[0-9]+, 16\(X[0-9]+\)` -`MOVB`
	binary.LittleEndian.PutUint64(s.b[8:], x)
}

func store_le_byte4_uint32_aligned(s *memCombineAligned, x uint32) {
	// riscv64:`MOVW X[0-9]+, 8\(X[0-9]+\)` -`MOVB`
	binary.LittleEndian.PutUint32(s.b[:], x)
}

func store_le_byte4_uint32_aligned_offset2(s *memCombineAligned, x uint32) {
	// riscv64:`MOVB` -`MOVW`
	binary.LittleEndian.PutUint32(s.b[2:], x)
}

func store_le_byte4_uint32_aligned_offset4(s *memCombineAligned, x uint32) {
	// riscv64:`MOVW X[0-9]+, 12\(X[0-9]+\)` -`MOVB`
	binary.LittleEndian.PutUint32(s.b[4:], x)
}

func store_le_byte2_uint16_aligned(s *memCombineAligned, x uint16) {
	// riscv64:`MOVH X[0-9]+, 8\(X[0-9]+\)` -`MOVB`
	binary.LittleEndian.PutUint16(s.b[:], x)
}

func store_le_byte2_uint16_aligned_offset1(s *memCombineAligned, x uint16) {
	// riscv64:`MOVB` -`MOVH`
	binary.LittleEndian.PutUint16(s.b[1:], x)
}

func store_le_byte8_uint64_unaligned(s *memCombineUnaligned08, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[:], x)
}

func store_le_byte8_uint64_unaligned_offset7(s *memCombineUnaligned78, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[:], x)
}

func store_le_byte8_uint64_unaligned_slice_offset1(s *memCombineUnaligned16, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[1:], x)
}

func store_le_byte8_uint64_unaligned_slice_offset2(s *memCombineUnaligned16, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[2:], x)
}

func store_le_byte8_uint64_unaligned_slice_offset3(s *memCombineUnaligned16, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[3:], x)
}

func store_le_byte8_uint64_unaligned_slice_offset4(s *memCombineUnaligned16, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[4:], x)
}

func store_le_byte8_uint64_unaligned_slice_offset5(s *memCombineUnaligned16, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[5:], x)
}

func store_le_byte8_uint64_unaligned_slice_offset6(s *memCombineUnaligned16, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[6:], x)
}

func store_le_byte8_uint64_unaligned_slice_offset7(s *memCombineUnaligned16, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[7:], x)
}

func store_le_byte8_uint64_unaligned_slice_offset8(s *memCombineUnaligned16, x uint64) {
	// riscv64:`MOVB` -`MOV `
	binary.LittleEndian.PutUint64(s.b[8:], x)
}

func store_le32(b []byte, x uint32) {
	// amd64:`MOVL `
	// arm64:`MOVW` -`MOV[BH]`
	// ppc64le:`MOVW `
	// ppc64:`MOVWBR`
	// s390x:`MOVWBR .*\(.*\)$`
	binary.LittleEndian.PutUint32(b, x)
}

func store_le32_idx(b []byte, x uint32, idx int) {
	// amd64:`MOVL `
	// arm64:`MOVW R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` -`MOV[BH]`
	// ppc64le:`MOVW `
	// ppc64:`MOVWBR`
	// s390x:`MOVWBR .*\(.*\)\(.*\*1\)$`
	binary.LittleEndian.PutUint32(b[idx:], x)
}

func store_le32_idx_const(b []byte, idx int) {
	// amd64:`MOVL \$123, \(.*\)\(.*\*1\)$`
	// ppc64x:`MOVW ` -`MOV[HB]`
	binary.LittleEndian.PutUint32(b[idx:], 123)
}

func store_le16(b []byte, x uint16) {
	// amd64:`MOVW `
	// arm64:`MOVH` -`MOVB`
	// ppc64le:`MOVH `
	// ppc64:`MOVHBR`
	// s390x:`MOVHBR .*\(.*\)$`
	binary.LittleEndian.PutUint16(b, x)
}

func store_le16_idx(b []byte, x uint16, idx int) {
	// amd64:`MOVW `
	// arm64:`MOVH R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` -`MOVB`
	// ppc64le:`MOVH `
	// ppc64:`MOVHBR `
	// s390x:`MOVHBR .*\(.*\)\(.*\*1\)$`
	binary.LittleEndian.PutUint16(b[idx:], x)
}

func store_le16_idx_const(b []byte, idx int) {
	// amd64:`MOVW \$123, \(.*\)\(.*\*1\)$`
	// ppc64x:`MOVH `
	binary.LittleEndian.PutUint16(b[idx:], 123)
}

func store_be64(b []byte, x uint64) {
	// amd64/v1,amd64/v2:`BSWAPQ` -`SHR.`
	// amd64/v3: `MOVBEQ`
	// arm64:`MOVD` `REV` -`MOV[WBH]` -`REVW` -`REV16W`
	// ppc64le:`MOVDBR`
	// ppc64:`MOVD `
	// s390x:`MOVD .*\(.*\)$` -`SRW ` -`SRD `
	binary.BigEndian.PutUint64(b, x)
}

func store_be64_idx(b []byte, x uint64, idx int) {
	// amd64/v1,amd64/v2:`BSWAPQ` -`SHR.`
	// amd64/v3:`MOVBEQ [A-Z]+[0-9]*, \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\)`
	// arm64:`REV` `MOVD R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` -`MOV[BHW]` -`REV16W` -`REVW`
	// ppc64le:`MOVDBR`
	// ppc64:`MOVD `
	// s390x:`MOVD .*\(.*\)\(.*\*1\)$` -`SRW ` -`SRD `
	binary.BigEndian.PutUint64(b[idx:], x)
}

func store_be32(b []byte, x uint32) {
	// amd64/v1,amd64/v2:`BSWAPL` -`SHR.`
	// amd64/v3:`MOVBEL`
	// arm64:`MOVW` `REVW` -`MOV[BH]` -`REV16W`
	// ppc64le:`MOVWBR`
	// ppc64:`MOVW `
	// s390x:`MOVW .*\(.*\)$` -`SRW ` -`SRD `
	binary.BigEndian.PutUint32(b, x)
}

func store_be64_load(b, x *[8]byte) {
	// arm64:-`REV`
	// amd64:-`BSWAPQ`
	binary.BigEndian.PutUint64(b[:], binary.BigEndian.Uint64(x[:]))
}

func store_be32_load(b, x *[8]byte) {
	// arm64:-`REVW`
	// amd64:-`BSWAPL`
	binary.BigEndian.PutUint32(b[:], binary.BigEndian.Uint32(x[:]))
}

func store_be32_idx(b []byte, x uint32, idx int) {
	// amd64/v1,amd64/v2:`BSWAPL` -`SHR.`
	// amd64/v3:`MOVBEL [A-Z]+[0-9]*, \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\)`
	// arm64:`REVW` `MOVW R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` -`MOV[BH]` -`REV16W`
	// ppc64le:`MOVWBR`
	// ppc64:`MOVW `
	// s390x:`MOVW .*\(.*\)\(.*\*1\)$` -`SRW ` -`SRD `
	binary.BigEndian.PutUint32(b[idx:], x)
}

func store_be16(b []byte, x uint16) {
	// amd64/v1,amd64/v2:`ROLW \$8` -`SHR.`
	// amd64/v3:`MOVBEW` -`ROLW`
	// arm64:`MOVH` `REV16W` -`MOVB`
	// ppc64le:`MOVHBR`
	// ppc64:`MOVH `
	// s390x:`MOVH .*\(.*\)$` -`SRW ` -`SRD `
	binary.BigEndian.PutUint16(b, x)
}

func store_be16_idx(b []byte, x uint16, idx int) {
	// amd64/v1,amd64/v2:`ROLW \$8` -`SHR.`
	// amd64/v3:`MOVBEW [A-Z]+[0-9]*, \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\)`
	// arm64:`MOVH R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` `REV16W` -`MOVB`
	// ppc64le:`MOVHBR`
	// ppc64:`MOVH `
	// s390x:`MOVH .*\(.*\)\(.*\*1\)$` -`SRW ` -`SRD `
	binary.BigEndian.PutUint16(b[idx:], x)
}

func store_le_byte_2(b []byte, val uint16) {
	_ = b[2]
	// arm64:`MOVH R[0-9]+, 1\(R[0-9]+\)` -`MOVB`
	// 386:`MOVW [A-Z]+, 1\([A-Z]+\)` -`MOVB`
	// amd64:`MOVW [A-Z]+, 1\([A-Z]+\)` -`MOVB`
	// ppc64le:`MOVH ` -`MOVB`
	// ppc64:`MOVHBR` -`MOVB`
	b[1], b[2] = byte(val), byte(val>>8)
}

func store_le_byte_2_inv(b []byte, val uint16) {
	_ = b[2]
	// 386:`MOVW [A-Z]+, 1\([A-Z]+\)` -`MOVB`
	// amd64:`MOVW [A-Z]+, 1\([A-Z]+\)` -`MOVB`
	// ppc64le:`MOVH ` -`MOVB`
	// ppc64:`MOVHBR` -`MOVB`
	b[2], b[1] = byte(val>>8), byte(val)
}

func store_le_byte_4(b []byte, val uint32) {
	_ = b[4]
	// arm64:`MOVW R[0-9]+, 1\(R[0-9]+\)` -`MOVB` -`MOVH`
	// 386:`MOVL [A-Z]+, 1\([A-Z]+\)` -`MOVB` -`MOVW`
	// amd64:`MOVL [A-Z]+, 1\([A-Z]+\)` -`MOVB` -`MOVW`
	// ppc64le:`MOVW `
	// ppc64:`MOVWBR `
	b[1], b[2], b[3], b[4] = byte(val), byte(val>>8), byte(val>>16), byte(val>>24)
}

func store_le_byte_8(b []byte, val uint64) {
	_ = b[8]
	// arm64:`MOVD R[0-9]+, 1\(R[0-9]+\)` -`MOVB` -`MOVH` -`MOVW`
	// amd64:`MOVQ [A-Z]+, 1\([A-Z]+\)` -`MOVB` -`MOVW` -`MOVL`
	// ppc64le:`MOVD ` -`MOVW`
	// ppc64:`MOVDBR `
	b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8] = byte(val), byte(val>>8), byte(val>>16), byte(val>>24), byte(val>>32), byte(val>>40), byte(val>>48), byte(val>>56)
}

func store_be_byte_2(b []byte, val uint16) {
	_ = b[2]
	// arm64:`REV16W` `MOVH R[0-9]+, 1\(R[0-9]+\)` -`MOVB`
	// amd64/v1,amd64/v2:`MOVW [A-Z]+, 1\([A-Z]+\)` -`MOVB`
	// amd64/v3: `MOVBEW`
	// ppc64le:`MOVHBR`
	// ppc64:`MOVH `
	b[1], b[2] = byte(val>>8), byte(val)
}

func store_be_byte_4(b []byte, val uint32) {
	_ = b[4]
	// arm64:`REVW` `MOVW R[0-9]+, 1\(R[0-9]+\)` -`MOVB` -`MOVH` -`REV16W`
	// amd64/v1,amd64/v2:`MOVL [A-Z]+, 1\([A-Z]+\)` -`MOVB` -`MOVW`
	// amd64/v3:`MOVBEL [A-Z]+, 1\([A-Z]+\)`
	// ppc64le:`MOVWBR`
	// ppc64:`MOVW `
	b[1], b[2], b[3], b[4] = byte(val>>24), byte(val>>16), byte(val>>8), byte(val)
}

func store_be_byte_8(b []byte, val uint64) {
	_ = b[8]
	// arm64:`REV` `MOVD R[0-9]+, 1\(R[0-9]+\)` -`MOVB` -`MOVH` -`MOVW` -`REV16W` -`REVW`
	// amd64/v1,amd64/v2:`MOVQ [A-Z]+, 1\([A-Z]+\)` -`MOVB` -`MOVW` -`MOVL`
	// amd64/v3:`MOVBEQ [A-Z]+, 1\([A-Z]+\)` -`MOVBEL`
	// ppc64le:`MOVDBR`
	// ppc64:`MOVD`
	b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8] = byte(val>>56), byte(val>>48), byte(val>>40), byte(val>>32), byte(val>>24), byte(val>>16), byte(val>>8), byte(val)
}

func store_le_byte_2_idx(b []byte, idx int, val uint16) {
	_, _ = b[idx+0], b[idx+1]
	// arm64:`MOVH R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` -`MOVB`
	// 386:`MOVW [A-Z]+, \([A-Z]+\)\([A-Z]+` -`MOVB`
	// ppc64le:`MOVH `
	// ppc64:`MOVHBR`
	b[idx+1], b[idx+0] = byte(val>>8), byte(val)
}

func store_le_byte_2_idx_inv(b []byte, idx int, val uint16) {
	_, _ = b[idx+0], b[idx+1]
	// 386:`MOVW [A-Z]+, \([A-Z]+\)\([A-Z]+` -`MOVB`
	// ppc64le:`MOVH `
	// ppc64:`MOVHBR`
	b[idx+0], b[idx+1] = byte(val), byte(val>>8)
}

func store_le_byte_4_idx(b []byte, idx int, val uint32) {
	_, _, _, _ = b[idx+0], b[idx+1], b[idx+2], b[idx+3]
	// arm64:`MOVW R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` -`MOVB` -`MOVH`
	// ppc64le:`MOVW `
	// ppc64:`MOVWBR`
	b[idx+3], b[idx+2], b[idx+1], b[idx+0] = byte(val>>24), byte(val>>16), byte(val>>8), byte(val)
}

func store_be_byte_2_idx(b []byte, idx int, val uint16) {
	_, _ = b[idx+0], b[idx+1]
	// arm64:`REV16W` `MOVH R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` -`MOVB`
	// ppc64le:`MOVHBR`
	// ppc64:`MOVH `
	b[idx+0], b[idx+1] = byte(val>>8), byte(val)
}

func store_be_byte_4_idx(b []byte, idx int, val uint32) {
	_, _, _, _ = b[idx+0], b[idx+1], b[idx+2], b[idx+3]
	// arm64:`REVW` `MOVW R[0-9]+, \(R[0-9]+\)\(R[0-9]+\)` -`MOVB` -`MOVH` -`REV16W`
	// ppc64le:`MOVWBR`
	// ppc64:`MOVW `
	b[idx+0], b[idx+1], b[idx+2], b[idx+3] = byte(val>>24), byte(val>>16), byte(val>>8), byte(val)
}

func store_be_byte_2_idx2(b []byte, idx int, val uint16) {
	_, _ = b[(idx<<1)+0], b[(idx<<1)+1]
	// arm64:`REV16W` `MOVH R[0-9]+, \(R[0-9]+\)\(R[0-9]+<<1\)` -`MOVB`
	// ppc64le:`MOVHBR`
	// ppc64:`MOVH `
	b[(idx<<1)+0], b[(idx<<1)+1] = byte(val>>8), byte(val)
}

func store_le_byte_2_idx2(b []byte, idx int, val uint16) {
	_, _ = b[(idx<<1)+0], b[(idx<<1)+1]
	// arm64:`MOVH R[0-9]+, \(R[0-9]+\)\(R[0-9]+<<1\)` -`MOVB`
	// ppc64le:`MOVH `
	// ppc64:`MOVHBR`
	b[(idx<<1)+1], b[(idx<<1)+0] = byte(val>>8), byte(val)
}

func store_be_byte_4_idx4(b []byte, idx int, val uint32) {
	_, _, _, _ = b[(idx<<2)+0], b[(idx<<2)+1], b[(idx<<2)+2], b[(idx<<2)+3]
	// arm64:`REVW` `MOVW R[0-9]+, \(R[0-9]+\)\(R[0-9]+<<2\)` -`MOVB` -`MOVH` -`REV16W`
	// ppc64le:`MOVWBR`
	// ppc64:`MOVW `
	b[(idx<<2)+0], b[(idx<<2)+1], b[(idx<<2)+2], b[(idx<<2)+3] = byte(val>>24), byte(val>>16), byte(val>>8), byte(val)
}

func store_le_byte_4_idx4_inv(b []byte, idx int, val uint32) {
	_, _, _, _ = b[(idx<<2)+0], b[(idx<<2)+1], b[(idx<<2)+2], b[(idx<<2)+3]
	// arm64:`MOVW R[0-9]+, \(R[0-9]+\)\(R[0-9]+<<2\)` -`MOVB` -`MOVH`
	// ppc64le:`MOVW `
	// ppc64:`MOVWBR`
	b[(idx<<2)+3], b[(idx<<2)+2], b[(idx<<2)+1], b[(idx<<2)+0] = byte(val>>24), byte(val>>16), byte(val>>8), byte(val)
}

// ------------- //
//    Zeroing    //
// ------------- //

// Check that zero stores are combined into larger stores

func zero_byte_2(b1, b2 []byte) {
	// bounds checks to guarantee safety of writes below
	_, _ = b1[1], b2[1]
	// arm64:"MOVH ZR" -"MOVB"
	// amd64:`MOVW [$]0, \([A-Z]+\)`
	// 386:`MOVW [$]0, \([A-Z]+\)`
	// ppc64x:`MOVH `
	b1[0], b1[1] = 0, 0
	// arm64:"MOVH ZR" -"MOVB"
	// 386:`MOVW [$]0, \([A-Z]+\)`
	// amd64:`MOVW [$]0, \([A-Z]+\)`
	// ppc64x:`MOVH`
	b2[1], b2[0] = 0, 0
}

func zero_byte_4(b1, b2 []byte) {
	_, _ = b1[3], b2[3]
	// arm64:"MOVW ZR" -"MOVB" -"MOVH"
	// amd64:`MOVL X15, \([A-Z]+\)`
	// 386:`MOVL [$]0, \([A-Z]+\)`
	// ppc64x:`MOVW `
	b1[0], b1[1], b1[2], b1[3] = 0, 0, 0, 0
	// arm64:"MOVW ZR" -"MOVB" -"MOVH"
	// ppc64x:`MOVW `
	b2[2], b2[3], b2[1], b2[0] = 0, 0, 0, 0
}

func zero_byte_8(b []byte) {
	_ = b[7]
	b[0], b[1], b[2], b[3] = 0, 0, 0, 0 // arm64:"MOVD ZR" -"MOVB" -"MOVH" -"MOVW"
	b[4], b[5], b[6], b[7] = 0, 0, 0, 0
}

func zero_byte_16(b []byte) {
	_ = b[15]
	b[0], b[1], b[2], b[3] = 0, 0, 0, 0 // arm64:"STP" -"MOVB" -"MOVH" -"MOVW"
	b[4], b[5], b[6], b[7] = 0, 0, 0, 0
	b[8], b[9], b[10], b[11] = 0, 0, 0, 0
	b[12], b[13], b[14], b[15] = 0, 0, 0, 0
}

func zero_byte_30(a *[30]byte) {
	*a = [30]byte{} // arm64:"STP" -"MOVB" -"MOVH" -"MOVW"
}

func zero_byte_39(a *[39]byte) {
	*a = [39]byte{} // arm64:"MOVD" -"MOVB" -"MOVH" -"MOVW"
}

func zero_byte_2_idx(b []byte, idx int) {
	_, _ = b[idx+0], b[idx+1]
	// arm64:`MOVH ZR, \(R[0-9]+\)\(R[0-9]+\)` -`MOVB`
	// ppc64x:`MOVH `
	b[idx+0], b[idx+1] = 0, 0
}

func zero_byte_2_idx2(b []byte, idx int) {
	_, _ = b[(idx<<1)+0], b[(idx<<1)+1]
	// arm64:`MOVH ZR, \(R[0-9]+\)\(R[0-9]+<<1\)` -`MOVB`
	// ppc64x:`MOVH `
	b[(idx<<1)+0], b[(idx<<1)+1] = 0, 0
}

func zero_uint16_2(h1, h2 []uint16) {
	_, _ = h1[1], h2[1]
	// arm64:"MOVW ZR" -"MOVB" -"MOVH"
	// amd64:`MOVL X15, \([A-Z]+\)`
	// 386:`MOVL [$]0, \([A-Z]+\)`
	// ppc64x:`MOVW `
	h1[0], h1[1] = 0, 0
	// arm64:"MOVW ZR" -"MOVB" -"MOVH"
	// amd64:`MOVL X15, \([A-Z]+\)`
	// 386:`MOVL [$]0, \([A-Z]+\)`
	// ppc64x:`MOVW`
	h2[1], h2[0] = 0, 0
}

func zero_uint16_4(h1, h2 []uint16) {
	_, _ = h1[3], h2[3]
	// arm64:"MOVD ZR" -"MOVB" -"MOVH" -"MOVW"
	// amd64:`MOVQ X15, \([A-Z]+\)`
	// ppc64x:`MOVD `
	h1[0], h1[1], h1[2], h1[3] = 0, 0, 0, 0
	// arm64:"MOVD ZR" -"MOVB" -"MOVH" -"MOVW"
	// ppc64x:`MOVD `
	h2[2], h2[3], h2[1], h2[0] = 0, 0, 0, 0
}

func zero_uint16_8(h []uint16) {
	_ = h[7]
	h[0], h[1], h[2], h[3] = 0, 0, 0, 0 // arm64:"STP" -"MOVB" -"MOVH"
	h[4], h[5], h[6], h[7] = 0, 0, 0, 0
}

func zero_uint32_2(w1, w2 []uint32) {
	_, _ = w1[1], w2[1]
	// arm64:"MOVD ZR" -"MOVB" -"MOVH" -"MOVW"
	// amd64:`MOVQ X15, \([A-Z]+\)`
	// ppc64x:`MOVD `
	w1[0], w1[1] = 0, 0
	// arm64:"MOVD ZR" -"MOVB" -"MOVH" -"MOVW"
	// amd64:`MOVQ X15, \([A-Z]+\)`
	// ppc64x:`MOVD `
	w2[1], w2[0] = 0, 0
}

func zero_uint32_4(w1, w2 []uint32) {
	_, _ = w1[3], w2[3]
	w1[0], w1[1], w1[2], w1[3] = 0, 0, 0, 0 // arm64:"STP" -"MOVB" -"MOVH"
	w2[2], w2[3], w2[1], w2[0] = 0, 0, 0, 0 // arm64:"STP" -"MOVB" -"MOVH"
}

func zero_uint64_2(d1, d2 []uint64) {
	_, _ = d1[1], d2[1]
	d1[0], d1[1] = 0, 0 // arm64:"STP" -"MOVB" -"MOVH"
	d2[1], d2[0] = 0, 0 // arm64:"STP" -"MOVB" -"MOVH"
}

func loadstore(p, q *[4]uint8) {
	// amd64:"MOVL" -"MOVB"
	// arm64:"MOVWU" -"MOVBU"
	x0, x1, x2, x3 := q[0], q[1], q[2], q[3]
	// amd64:"MOVL" -"MOVB"
	// arm64:"MOVW" -"MOVB"
	p[0], p[1], p[2], p[3] = x0, x1, x2, x3
}

type S1 struct {
	a, b int16
}

func loadstore2(p, q *S1) {
	// amd64:"MOVL" -"MOVWLZX"
	// arm64:"MOVWU" -"MOVH"
	a, b := p.a, p.b
	// amd64:"MOVL" -"MOVW"
	// arm64:"MOVW" -"MOVH"
	q.a, q.b = a, b
}

func wideStore(p *[8]uint64) {
	if p == nil {
		return
	}

	// amd64:"MOVUPS" -"MOVQ"
	// arm64:"STP" -"MOVD"
	p[0] = 0
	// amd64:-"MOVUPS" -"MOVQ"
	// arm64:-"STP" -"MOVD"
	p[1] = 0
}

func wideStore2(p *[8]uint64, x, y uint64) {
	if p == nil {
		return
	}

	// s390x:"STMG"
	p[0] = x
	// s390x:-"STMG" -"MOVD"
	p[1] = y
}

func store32le(p *struct{ a, b uint32 }, x uint64) {
	// amd64:"MOVQ" -"MOVL" -"SHRQ"
	// arm64:"MOVD" -"MOVW" -"LSR"
	// ppc64le:"MOVD" -"MOVW" -"SRD"
	p.a = uint32(x)
	// amd64:-"MOVL" -"SHRQ"
	// arm64:-"MOVW" -"LSR"
	// ppc64le:-"MOVW" -"SRD"
	p.b = uint32(x >> 32)
}
func store32be(p *struct{ a, b uint32 }, x uint64) {
	// arm64:"STPW"
	// ppc64:"MOVD" -"MOVW" -"SRD"
	// s390x:"MOVD" -"MOVW" -"SRD"
	p.a = uint32(x >> 32)
	// arm64:-"STPW"
	// ppc64:-"MOVW" -"SRD"
	// s390x:-"MOVW" -"SRD"
	p.b = uint32(x)
}
func store16le(p *struct{ a, b uint16 }, x uint32) {
	// amd64:"MOVL" -"MOVW" -"SHRL"
	// arm64:"MOVW" -"MOVH" -"UBFX"
	// ppc64le:"MOVW" -"MOVH" -"SRW"
	p.a = uint16(x)
	// amd64:-"MOVW" -"SHRL"
	// arm64:-"MOVH" -"UBFX"
	// ppc64le:-"MOVH" -"SRW"
	p.b = uint16(x >> 16)
}
func store16be(p *struct{ a, b uint16 }, x uint32) {
	// ppc64:"MOVW" -"MOVH" -"SRW"
	// s390x:"MOVW" -"MOVH" -"SRW"
	p.a = uint16(x >> 16)
	// ppc64:-"MOVH" -"SRW"
	// s390x:-"MOVH" -"SRW"
	p.b = uint16(x)
}

func storeBoolConst(p *struct{ a, b bool }) {
	// amd64:"MOVW" -"MOVB"
	// arm64:"MOVH" -"MOVB"
	p.a = true
	p.b = true
}
func issue66413(p *struct {
	a byte
	b bool
	c bool
	d int8
}) {
	// amd64:"MOVL" -"MOVB"
	// arm64:"MOVW" -"MOVB"
	p.a = 31
	p.b = false
	p.c = true
	p.d = 12
}

func issue70300(v uint64) (b [8]byte) {
	// amd64:"MOVQ" -"MOVB"
	b[0] = byte(v)
	b[1] = byte(v >> 8)
	b[2] = byte(v >> 16)
	b[3] = byte(v >> 24)
	b[4] = byte(v >> 32)
	b[5] = byte(v >> 40)
	b[6] = byte(v >> 48)
	b[7] = byte(v >> 56)
	return b
}

func issue70300Reverse(v uint64) (b [8]byte) {
	// amd64:"MOVQ" -"MOVB"
	b[7] = byte(v >> 56)
	b[6] = byte(v >> 48)
	b[5] = byte(v >> 40)
	b[4] = byte(v >> 32)
	b[3] = byte(v >> 24)
	b[2] = byte(v >> 16)
	b[1] = byte(v >> 8)
	b[0] = byte(v)
	return b
}

// --------------------------------- //
//    Arm64 double-register loads    //
// --------------------------------- //

func dwloadI64(p *struct{ a, b int64 }) int64 {
	// arm64:"LDP "
	return p.a + p.b
}
func dwloadI32(p *struct{ a, b int32 }) int32 {
	// arm64:"LDPSW "
	return p.a + p.b
}
func dwloadU32(p *struct{ a, b uint32 }) uint32 {
	// arm64:"LDPW "
	return p.a + p.b
}
func dwloadF64(p *struct{ a, b float64 }) float64 {
	// arm64:"FLDPD "
	return p.a + p.b
}
func dwloadF32(p *struct{ a, b float32 }) float32 {
	// arm64:"FLDPS "
	return p.a + p.b
}

func dwloadBig(p *struct{ a, b, c, d, e, f int64 }) int64 {
	// arm64:"LDP \\(" "LDP 16" "LDP 32"
	return p.c + p.f + p.a + p.e + p.d + p.b
}

func dwloadArg(a [2]int64) int64 {
	// arm64:"LDP "
	return a[0] + a[1]
}

func dwloadResult1(p *string) string {
	// arm64:"LDP \\(R0\\), \\(R0, R1\\)"
	return *p
}

func dwloadResult2(p *[2]int64) (int64, int64) {
	// arm64:"LDP \\(R0\\), \\(R1, R0\\)"
	return p[1], p[0]
}

func dwloadConditional(p *[2]int64) (int64, int64) {
	// arm64:"LDP \\(R0\\), \\(R0, R1\\)"
	x := p[0]
	if x == 0 {
		return x, 0
	}
	return x, p[1]
}

// ---------------------------------- //
//    Arm64 double-register stores    //
// ---------------------------------- //

func dwstoreI64(p *struct{ a, b int64 }, x, y int64) {
	// arm64:"STP "
	p.a = x
	p.b = y
}
func dwstoreI32(p *struct{ a, b int32 }, x, y int32) {
	// arm64:"STPW "
	p.a = x
	p.b = y
}
func dwstoreF64(p *struct{ a, b float64 }, x, y float64) {
	// arm64:"FSTPD "
	p.a = x
	p.b = y
}
func dwstoreF32(p *struct{ a, b float32 }, x, y float32) {
	// arm64:"FSTPS "
	p.a = x
	p.b = y
}

func dwstoreBig(p *struct{ a, b, c, d, e, f int64 }, a, b, c, d, e, f int64) {
	// arm64:`STP\s\(R[0-9]+, R[0-9]+\), 16\(R[0-9]+\)`
	p.c = c
	p.f = f
	// arm64:`STP \(R[0-9]+, R[0-9]+\), \(R[0-9]+\)`
	p.a = a
	// arm64:`STP\s\(R[0-9]+, R[0-9]+\), 32\(R[0-9]+\)`
	p.e = e
	p.d = d
	p.b = b
}

func dwstoreBigNil(p *struct{ i, j struct{ a, b, c int } }) {
	// arm64:`STP\s\(ZR, ZR\), 32\(R[0-9]+\)`
	p.j = struct{ a, b, c int }{}
	// arm64:`STP\s\(ZR, ZR\), \(R[0-9]+\)`
	// arm64:`STP\s\(ZR, ZR\), 16\(R[0-9]+\)`
	p.i = struct{ a, b, c int }{}
}

func dwstoreRet() [2]int {
	// arm64:"STP "
	return [2]int{5, 6}
}

func dwstoreLocal(i int) int64 {
	var a [2]int64
	a[0] = 5
	// arm64:"STP "
	a[1] = 6
	return a[i]
}

func dwstoreOrder(p *struct {
	a, b       int64
	c, d, e, f bool
}, a, b int64) {
	// arm64:"STP "
	p.a = a
	p.c = true
	p.e = true
	p.b = b
}

// --------------------------------------------------- //
//    arm64 spill/reload pair coalescing               //
// --------------------------------------------------- //

// Spills and reloads do not exist when the SSA pair pass runs: regalloc
// inserts them later, so they never get a chance to be fused by that pass.
// A late Prog-level pass in cmd/compile/internal/arm64 catches adjacent
// spill/reload pairs that target the same base register at consecutive
// 8-byte offsets. These tests pin down that behavior.

//go:noinline
func dwpairClobber() {}

// Two distinct values that need to survive a call: regalloc spills both,
// and the late pass coalesces the adjacent reloads into a single LDP. The
// pattern requires a spill-slot (SP) base so that a frame-pointer epilogue
// LDP, which uses (RSP), cannot satisfy it.
func dwpairSpillReloadDistinct(p, q *int) (int, int) {
	a := *p
	b := *q
	dwpairClobber()
	// arm64:`LDP\s.+\(SP\), \(R[0-9]+, R[0-9]+\)`
	return a, b
}