Adding upstream version 1.20.14.upstream/1.20.14upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 721 insertions, 0 deletions

diff --git a/test/codegen/memcombine.go b/test/codegen/memcombine.go
new file mode 100644
index 0000000..8143b6b
--- /dev/null
+++ b/test/codegen/memcombine.go
@@ -0,0 +1,721 @@
+// 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\s\(.*\),`,-`MOV[BWL]\t[^$]`,-`OR`
+	// s390x:`MOVDBR\s\(.*\),`
+	// arm64:`MOVD\s\(R[0-9]+\),`,-`MOV[BHW]`
+	// ppc64le:`MOVD\s`,-`MOV[BHW]Z`
+	return binary.LittleEndian.Uint64(b)
+}
+
+func load_le64_idx(b []byte, idx int) uint64 {
+	// amd64:`MOVQ\s\(.*\)\(.*\*1\),`,-`MOV[BWL]\t[^$]`,-`OR`
+	// s390x:`MOVDBR\s\(.*\)\(.*\*1\),`
+	// arm64:`MOVD\s\(R[0-9]+\)\(R[0-9]+\),`,-`MOV[BHW]`
+	// ppc64le:`MOVD\s`,-`MOV[BHW]Z\s`
+	return binary.LittleEndian.Uint64(b[idx:])
+}
+
+func load_le32(b []byte) uint32 {
+	// amd64:`MOVL\s\(.*\),`,-`MOV[BW]`,-`OR`
+	// 386:`MOVL\s\(.*\),`,-`MOV[BW]`,-`OR`
+	// s390x:`MOVWBR\s\(.*\),`
+	// arm64:`MOVWU\s\(R[0-9]+\),`,-`MOV[BH]`
+	// ppc64le:`MOVWZ\s`,-`MOV[BH]Z\s`
+	return binary.LittleEndian.Uint32(b)
+}
+
+func load_le32_idx(b []byte, idx int) uint32 {
+	// amd64:`MOVL\s\(.*\)\(.*\*1\),`,-`MOV[BW]`,-`OR`
+	// 386:`MOVL\s\(.*\)\(.*\*1\),`,-`MOV[BW]`,-`OR`
+	// s390x:`MOVWBR\s\(.*\)\(.*\*1\),`
+	// arm64:`MOVWU\s\(R[0-9]+\)\(R[0-9]+\),`,-`MOV[BH]`
+	// ppc64le:`MOVWZ\s`,-`MOV[BH]Z\s`
+	return binary.LittleEndian.Uint32(b[idx:])
+}
+
+func load_le16(b []byte) uint16 {
+	// amd64:`MOVWLZX\s\(.*\),`,-`MOVB`,-`OR`
+	// ppc64le:`MOVHZ\s`,-`MOVBZ`
+	// arm64:`MOVHU\s\(R[0-9]+\),`,-`MOVB`
+	// s390x:`MOVHBR\s\(.*\),`
+	return binary.LittleEndian.Uint16(b)
+}
+
+func load_le16_idx(b []byte, idx int) uint16 {
+	// amd64:`MOVWLZX\s\(.*\),`,-`MOVB`,-`OR`
+	// ppc64le:`MOVHZ\s`,-`MOVBZ`
+	// arm64:`MOVHU\s\(R[0-9]+\)\(R[0-9]+\),`,-`MOVB`
+	// s390x:`MOVHBR\s\(.*\)\(.*\*1\),`
+	return binary.LittleEndian.Uint16(b[idx:])
+}
+
+func load_be64(b []byte) uint64 {
+	// amd64/v1,amd64/v2:`BSWAPQ`,-`MOV[BWL]\t[^$]`,-`OR`
+	// amd64/v3:`MOVBEQ`
+	// s390x:`MOVD\s\(.*\),`
+	// arm64:`REV`,`MOVD\s\(R[0-9]+\),`,-`MOV[BHW]`,-`REVW`,-`REV16W`
+	// ppc64le:`MOVDBR`,-`MOV[BHW]Z`
+	return binary.BigEndian.Uint64(b)
+}
+
+func load_be64_idx(b []byte, idx int) uint64 {
+	// amd64/v1,amd64/v2:`BSWAPQ`,-`MOV[BWL]\t[^$]`,-`OR`
+	// amd64/v3: `MOVBEQ\t\([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\), [A-Z]+[0-9]*`
+	// s390x:`MOVD\s\(.*\)\(.*\*1\),`
+	// arm64:`REV`,`MOVD\s\(R[0-9]+\)\(R[0-9]+\),`,-`MOV[WHB]`,-`REVW`,-`REV16W`
+	// ppc64le:`MOVDBR`,-`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\s\(.*\),`
+	// arm64:`REVW`,`MOVWU\s\(R[0-9]+\),`,-`MOV[BH]`,-`REV16W`
+	// ppc64le:`MOVWBR`,-`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\t\([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\), [A-Z]+[0-9]*`
+	// s390x:`MOVWZ\s\(.*\)\(.*\*1\),`
+	// arm64:`REVW`,`MOVWU\s\(R[0-9]+\)\(R[0-9]+\),`,-`MOV[HB]`,-`REV16W`
+	// ppc64le:`MOVWBR`,-`MOV[BH]Z`
+	return binary.BigEndian.Uint32(b[idx:])
+}
+
+func load_be16(b []byte) uint16 {
+	// amd64:`ROLW\s\$8`,-`MOVB`,-`OR`
+	// arm64:`REV16W`,`MOVHU\s\(R[0-9]+\),`,-`MOVB`
+	// ppc64le:`MOVHBR`
+	// s390x:`MOVHZ\s\(.*\),`,-`OR`,-`ORW`,-`SLD`,-`SLW`
+	return binary.BigEndian.Uint16(b)
+}
+
+func load_be16_idx(b []byte, idx int) uint16 {
+	// amd64:`ROLW\s\$8`,-`MOVB`,-`OR`
+	// arm64:`REV16W`,`MOVHU\s\(R[0-9]+\)\(R[0-9]+\),`,-`MOVB`
+	// ppc64le:`MOVHBR`
+	// s390x:`MOVHZ\s\(.*\)\(.*\*1\),`,-`OR`,-`ORW`,-`SLD`,-`SLW`
+	return binary.BigEndian.Uint16(b[idx:])
+}
+
+func load_le_byte2_uint16(s []byte) uint16 {
+	// arm64:`MOVHU\t\(R[0-9]+\)`,-`ORR`,-`MOVB`
+	// 386:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`OR`
+	// amd64:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`OR`
+	// ppc64le:`MOVHZ\t\(R[0-9]+\)`,-`MOVBZ`
+	return uint16(s[0]) | uint16(s[1])<<8
+}
+
+func load_le_byte2_uint16_inv(s []byte) uint16 {
+	// arm64:`MOVHU\t\(R[0-9]+\)`,-`ORR`,-`MOVB`
+	// 386:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`OR`
+	// amd64:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`OR`
+	// ppc64le:`MOVHZ\t\(R[0-9]+\)`,-`MOVDZ`
+	return uint16(s[1])<<8 | uint16(s[0])
+}
+
+func load_le_byte4_uint32(s []byte) uint32 {
+	// arm64:`MOVWU\t\(R[0-9]+\)`,-`ORR`,-`MOV[BH]`
+	// 386:`MOVL\s\([A-Z]+\)`,-`MOV[BW]`,-`OR`
+	// amd64:`MOVL\s\([A-Z]+\)`,-`MOV[BW]`,-`OR`
+	// ppc64le:`MOVWZ\t\(R[0-9]+\)`,-`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\t\(R[0-9]+\)`,-`ORR`,-`MOV[BH]`
+	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\t\(R[0-9]+\)`,-`ORR`,-`MOV[BHW]`
+	// amd64:`MOVQ\s\([A-Z]+\),\s[A-Z]+`,-`MOV[BWL]\t[^$]`,-`OR`
+	// ppc64le:`MOVD\t\(R[0-9]+\)`,-`MOV[BHW]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\t\(R[0-9]+\)`,-`ORR`,-`MOV[BHW]`
+	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])
+}
+
+func load_be_byte2_uint16(s []byte) uint16 {
+	// arm64:`MOVHU\t\(R[0-9]+\)`,`REV16W`,-`ORR`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)`,`ROLW`,-`MOVB`,-`OR`
+	// ppc64le:`MOVHBR\t\(R[0-9]+\)`,-`MOVBZ`
+	return uint16(s[0])<<8 | uint16(s[1])
+}
+
+func load_be_byte2_uint16_inv(s []byte) uint16 {
+	// arm64:`MOVHU\t\(R[0-9]+\)`,`REV16W`,-`ORR`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)`,`ROLW`,-`MOVB`,-`OR`
+	// ppc64le:`MOVHBR\t\(R[0-9]+\)`,-`MOVBZ`
+	return uint16(s[1]) | uint16(s[0])<<8
+}
+
+func load_be_byte4_uint32(s []byte) uint32 {
+	// arm64:`MOVWU\t\(R[0-9]+\)`,`REVW`,-`ORR`,-`REV16W`,-`MOV[BH]`
+	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\t\(R[0-9]+\)`,`REVW`,-`ORR`,-`REV16W`,-`MOV[BH]`
+	// amd64/v1,amd64/v2:`MOVL\s\([A-Z]+\)`,`BSWAPL`,-`MOV[BW]`,-`OR`
+	// amd64/v3: `MOVBEL`
+	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\t\(R[0-9]+\)`,`REV`,-`ORR`,-`REVW`,-`REV16W`,-`MOV[BHW]`
+	// ppc64le:`MOVDBR\t\(R[0-9]+\)`,-`MOV[BHW]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\t\(R[0-9]+\)`,`REV`,-`ORR`,-`REVW`,-`REV16W`,-`MOV[BHW]`
+	// amd64/v1,amd64/v2:`MOVQ\s\([A-Z]+\),\s[A-Z]+`,`BSWAPQ`,-`MOV[BWL]\t[^$]`,-`OR`
+	// amd64/v3: `MOVBEQ`
+	// ppc64le:`MOVDBR\t\(R[0-9]+\)`,-`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\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOVB`
+	// 386:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`ORL`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`MOVB`,-`OR`
+	return uint16(s[idx]) | uint16(s[idx+1])<<8
+}
+
+func load_le_byte2_uint16_idx_inv(s []byte, idx int) uint16 {
+	// arm64:`MOVHU\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOVB`
+	// 386:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`ORL`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`MOVB`,-`OR`
+	return uint16(s[idx+1])<<8 | uint16(s[idx])
+}
+
+func load_le_byte4_uint32_idx(s []byte, idx int) uint32 {
+	// arm64:`MOVWU\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOV[BH]`
+	// amd64:`MOVL\s\([A-Z]+\)\([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\s\(R[0-9]+\)\(R[0-9]+\)`,-`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\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOV[BHW]`
+	// amd64:`MOVQ\s\([A-Z]+\)\([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\s\(R[0-9]+\)\(R[0-9]+\)`,-`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\s\(R[0-9]+\)\(R[0-9]+\)`,`REV16W`,-`ORR`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)\([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\s\(R[0-9]+\)\(R[0-9]+\)`,`REV16W`,-`ORR`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)\([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\s\(R[0-9]+\)\(R[0-9]+\)`,`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\s\(R[0-9]+\)\(R[0-9]+\)`,`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\s\(R[0-9]+\)\(R[0-9]+<<1\)`,-`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\s\(R[0-9]+\)\(R[0-9]+<<1\)`,-`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\s\(R[0-9]+\)\(R[0-9]+<<2\)`,-`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\s\(R[0-9]+\)\(R[0-9]+<<2\)`,-`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\s\(R[0-9]+\)\(R[0-9]+<<3\)`,-`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\s\(R[0-9]+\)\(R[0-9]+<<3\)`,-`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\s\(R[0-9]+\)\(R[0-9]+<<1\)`,`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\s\(R[0-9]+\)\(R[0-9]+<<1\)`,`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\s\(R[0-9]+\)\(R[0-9]+<<2\)`,`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\s\(R[0-9]+\)\(R[0-9]+<<3\)`,`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 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\t\(`
+	*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\t[A-Z]`
+	}
+}
+
+// Make sure offsets are folded into loads and stores.
+func offsets_fold(_, a [20]byte) (b [20]byte) {
+	// arm64:`MOVD\tcommand-line-arguments\.a\+[0-9]+\(FP\), R[0-9]+`,`MOVD\tR[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\s.*\(.*\)$`,-`SHR.`
+	// arm64:`MOVD`,-`MOV[WBH]`
+	// ppc64le:`MOVD\s`,-`MOV[BHW]\s`
+	// s390x:`MOVDBR\s.*\(.*\)$`
+	binary.LittleEndian.PutUint64(b, x)
+}
+
+func store_le64_idx(b []byte, x uint64, idx int) {
+	// amd64:`MOVQ\s.*\(.*\)\(.*\*1\)$`,-`SHR.`
+	// arm64:`MOVD\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOV[BHW]`
+	// ppc64le:`MOVD\s`,-`MOV[BHW]\s`
+	// s390x:`MOVDBR\s.*\(.*\)\(.*\*1\)$`
+	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\s.*\(.*\)\(.*\*1\)$`,-`SHR.`
+	binary.LittleEndian.PutUint64(a, binary.LittleEndian.Uint64(b))
+	return dst
+}
+
+func store_le64_idx_const(b []byte, idx int) {
+	// amd64:`MOVQ\s\$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:-`MOV[BWH]`
+	// s390x:-`MOVB`,-`MOV[WH]BR`
+	binary.LittleEndian.PutUint64(b, binary.LittleEndian.Uint64(x[:]))
+}
+
+func store_le32(b []byte, x uint32) {
+	// amd64:`MOVL\s`
+	// arm64:`MOVW`,-`MOV[BH]`
+	// ppc64le:`MOVW\s`
+	// s390x:`MOVWBR\s.*\(.*\)$`
+	binary.LittleEndian.PutUint32(b, x)
+}
+
+func store_le32_idx(b []byte, x uint32, idx int) {
+	// amd64:`MOVL\s`
+	// arm64:`MOVW\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOV[BH]`
+	// ppc64le:`MOVW\s`
+	// s390x:`MOVWBR\s.*\(.*\)\(.*\*1\)$`
+	binary.LittleEndian.PutUint32(b[idx:], x)
+}
+
+func store_le32_idx_const(b []byte, idx int) {
+	// amd64:`MOVL\s\$123, \(.*\)\(.*\*1\)$`
+	binary.LittleEndian.PutUint32(b[idx:], 123)
+}
+
+func store_le16(b []byte, x uint16) {
+	// amd64:`MOVW\s`
+	// arm64:`MOVH`,-`MOVB`
+	// ppc64le:`MOVH\s`
+	// s390x:`MOVHBR\s.*\(.*\)$`
+	binary.LittleEndian.PutUint16(b, x)
+}
+
+func store_le16_idx(b []byte, x uint16, idx int) {
+	// amd64:`MOVW\s`
+	// arm64:`MOVH\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOVB`
+	// ppc64le:`MOVH\s`
+	// s390x:`MOVHBR\s.*\(.*\)\(.*\*1\)$`
+	binary.LittleEndian.PutUint16(b[idx:], x)
+}
+
+func store_le16_idx_const(b []byte, idx int) {
+	// amd64:`MOVW\s\$123, \(.*\)\(.*\*1\)$`
+	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`
+	// s390x:`MOVD\s.*\(.*\)$`,-`SRW\s`,-`SRD\s`
+	binary.BigEndian.PutUint64(b, x)
+}
+
+func store_be64_idx(b []byte, x uint64, idx int) {
+	// amd64/v1,amd64/v2:`BSWAPQ`,-`SHR.`
+	// amd64/v3:`MOVBEQ\t[A-Z]+[0-9]*, \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\)`
+	// arm64:`REV`,`MOVD\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOV[BHW]`,-`REV16W`,-`REVW`
+	// ppc64le:`MOVDBR`
+	// s390x:`MOVD\s.*\(.*\)\(.*\*1\)$`,-`SRW\s`,-`SRD\s`
+	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`
+	// s390x:`MOVW\s.*\(.*\)$`,-`SRW\s`,-`SRD\s`
+	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\t[A-Z]+[0-9]*, \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\)`
+	// arm64:`REVW`,`MOVW\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOV[BH]`,-`REV16W`
+	// ppc64le:`MOVWBR`
+	// s390x:`MOVW\s.*\(.*\)\(.*\*1\)$`,-`SRW\s`,-`SRD\s`
+	binary.BigEndian.PutUint32(b[idx:], x)
+}
+
+func store_be16(b []byte, x uint16) {
+	// amd64/v1,amd64/v2:`ROLW\s\$8`,-`SHR.`
+	// amd64/v3:`MOVBEW`,-`ROLW`
+	// arm64:`MOVH`,`REV16W`,-`MOVB`
+	// ppc64le:`MOVHBR`
+	// s390x:`MOVH\s.*\(.*\)$`,-`SRW\s`,-`SRD\s`
+	binary.BigEndian.PutUint16(b, x)
+}
+
+func store_be16_idx(b []byte, x uint16, idx int) {
+	// amd64/v1,amd64/v2:`ROLW\s\$8`,-`SHR.`
+	// amd64/v3:`MOVBEW\t[A-Z]+[0-9]*, \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\)`
+	// arm64:`MOVH\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,`REV16W`,-`MOVB`
+	// ppc64le:`MOVHBR`
+	// s390x:`MOVH\s.*\(.*\)\(.*\*1\)$`,-`SRW\s`,-`SRD\s`
+	binary.BigEndian.PutUint16(b[idx:], x)
+}
+
+func store_le_byte_2(b []byte, val uint16) {
+	_ = b[2]
+	// arm64:`MOVH\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`
+	// 386:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
+	// amd64:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
+	b[1], b[2] = byte(val), byte(val>>8)
+}
+
+func store_le_byte_2_inv(b []byte, val uint16) {
+	_ = b[2]
+	// 386:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
+	// amd64:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
+	b[2], b[1] = byte(val>>8), byte(val)
+}
+
+func store_le_byte_4(b []byte, val uint32) {
+	_ = b[4]
+	// arm64:`MOVW\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`,-`MOVH`
+	// 386:`MOVL\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`
+	// amd64:`MOVL\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`
+	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\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`,-`MOVH`,-`MOVW`
+	// amd64:`MOVQ\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`,-`MOVL`
+	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\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`
+	// amd64/v1,amd64/v2:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
+	// amd64/v3: `MOVBEW`
+	b[1], b[2] = byte(val>>8), byte(val)
+}
+
+func store_be_byte_4(b []byte, val uint32) {
+	_ = b[4]
+	// arm64:`REVW`,`MOVW\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`,-`MOVH`,-`REV16W`
+	// amd64/v1,amd64/v2:`MOVL\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`
+	// amd64/v3:`MOVBEL\s[A-Z]+,\s1\([A-Z]+\)`
+	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\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`,-`MOVH`,-`MOVW`,-`REV16W`,-`REVW`
+	// amd64/v1,amd64/v2:`MOVQ\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`,-`MOVL`
+	// amd64/v3:`MOVBEQ\s[A-Z]+,\s1\([A-Z]+\)`, -`MOVBEL`
+	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\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOVB`
+	// 386:`MOVW\s[A-Z]+,\s\([A-Z]+\)\([A-Z]+`,-`MOVB`
+	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\s[A-Z]+,\s\([A-Z]+\)\([A-Z]+`,-`MOVB`
+	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\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOVB`,-`MOVH`
+	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\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOVB`
+	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\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOVB`,-`MOVH`,-`REV16W`
+	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\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+<<1\)`,-`MOVB`
+	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\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+<<1\)`,-`MOVB`
+	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\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+<<2\)`,-`MOVB`,-`MOVH`,-`REV16W`
+	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\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+<<2\)`,-`MOVB`,-`MOVH`
+	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\tZR",-"MOVB"
+	// amd64:`MOVW\s[$]0,\s\([A-Z]+\)`
+	// 386:`MOVW\s[$]0,\s\([A-Z]+\)`
+	b1[0], b1[1] = 0, 0
+	// arm64:"MOVH\tZR",-"MOVB"
+	// 386:`MOVW\s[$]0,\s\([A-Z]+\)`
+	// amd64:`MOVW\s[$]0,\s\([A-Z]+\)`
+	b2[1], b2[0] = 0, 0
+}
+
+func zero_byte_4(b1, b2 []byte) {
+	_, _ = b1[3], b2[3]
+	// arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	// amd64:`MOVL\s[$]0,\s\([A-Z]+\)`
+	// 386:`MOVL\s[$]0,\s\([A-Z]+\)`
+	b1[0], b1[1], b1[2], b1[3] = 0, 0, 0, 0
+	// arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	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
+	b[4], b[5], b[6], b[7] = 0, 0, 0, 0 // arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+}
+
+func zero_byte_16(b []byte) {
+	_ = b[15]
+	b[0], b[1], b[2], b[3] = 0, 0, 0, 0
+	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 // arm64:"STP",-"MOVB",-"MOVH",-"MOVW"
+}
+
+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\sZR,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOVB`
+	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\sZR,\s\(R[0-9]+\)\(R[0-9]+<<1\)`,-`MOVB`
+	b[(idx<<1)+0], b[(idx<<1)+1] = 0, 0
+}
+
+func zero_uint16_2(h1, h2 []uint16) {
+	_, _ = h1[1], h2[1]
+	// arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	// amd64:`MOVL\s[$]0,\s\([A-Z]+\)`
+	// 386:`MOVL\s[$]0,\s\([A-Z]+\)`
+	h1[0], h1[1] = 0, 0
+	// arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	// amd64:`MOVL\s[$]0,\s\([A-Z]+\)`
+	// 386:`MOVL\s[$]0,\s\([A-Z]+\)`
+	h2[1], h2[0] = 0, 0
+}
+
+func zero_uint16_4(h1, h2 []uint16) {
+	_, _ = h1[3], h2[3]
+	// arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	// amd64:`MOVQ\s[$]0,\s\([A-Z]+\)`
+	h1[0], h1[1], h1[2], h1[3] = 0, 0, 0, 0
+	// arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	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
+	h[4], h[5], h[6], h[7] = 0, 0, 0, 0 // arm64:"STP",-"MOVB",-"MOVH"
+}
+
+func zero_uint32_2(w1, w2 []uint32) {
+	_, _ = w1[1], w2[1]
+	// arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	// amd64:`MOVQ\s[$]0,\s\([A-Z]+\)`
+	w1[0], w1[1] = 0, 0
+	// arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	// amd64:`MOVQ\s[$]0,\s\([A-Z]+\)`
+	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"
+}