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Commit deb83d06 authored by Matthew Dempsky's avatar Matthew Dempsky
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cmd/compile: remove unused write barrier helpers 

These have been unused since CL 10316.

Passes toolstash -cmp.

Change-Id: Icc19f3fcc7275fbee1c665f704e10a110ecce2a5
Reviewed-on: https://go-review.googlesource.com/21242Reviewed-by: 's avatarBrad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: 's avatarAustin Clements <austin@google.com>
parent 361b334c
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Showing with 2 additions and 317 deletions
src/cmd/compile/internal/gc/builtin.go
View file @ deb83d06
......@@ -86,34 +86,6 @@ const runtimeimport = "" +
"func @\"\".closechan (@\"\".hchan·1 any)\n" +
"var @\"\".writeBarrier struct { @\"\".enabled bool; @\"\".needed bool; @\"\".cgo bool }\n" +
"func @\"\".writebarrierptr (@\"\".dst·1 *any, @\"\".src·2 any)\n" +
"func @\"\".writebarrierstring (@\"\".dst·1 *any, @\"\".src·2 any)\n" +
"func @\"\".writebarrierslice (@\"\".dst·1 *any, @\"\".src·2 any)\n" +
"func @\"\".writebarrieriface (@\"\".dst·1 *any, @\"\".src·2 any)\n" +
"func @\"\".writebarrierfat01 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat10 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat11 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat001 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat010 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat011 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat100 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat101 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat110 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat111 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat0001 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat0010 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat0011 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat0100 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat0101 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat0110 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat0111 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat1000 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat1001 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat1010 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat1011 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat1100 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat1101 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat1110 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".writebarrierfat1111 (@\"\".dst·1 *any, _ uintptr \"unsafe-uintptr\", @\"\".src·3 any)\n" +
"func @\"\".typedmemmove (@\"\".typ·1 *byte, @\"\".dst·2 *any, @\"\".src·3 *any)\n" +
"func @\"\".typedslicecopy (@\"\".typ·2 *byte, @\"\".dst·3 any, @\"\".src·4 any) (? int)\n" +
"func @\"\".selectnbsend (@\"\".chanType·2 *byte, @\"\".hchan·3 chan<- any, @\"\".elem·4 *any) (? bool)\n" +
......
src/cmd/compile/internal/gc/builtin/runtime.go
View file @ deb83d06
......@@ -113,39 +113,6 @@ var writeBarrier struct {
}
func writebarrierptr(dst *any, src any)
func writebarrierstring(dst *any, src any)
func writebarrierslice(dst *any, src any)
func writebarrieriface(dst *any, src any)
// The unused *byte argument makes sure that src is 2-pointer-aligned,
// which is the maximum alignment on NaCl amd64p32
// (and possibly on 32-bit systems if we start 64-bit aligning uint64s).
// The bitmap in the name tells which words being copied are pointers.
func writebarrierfat01(dst *any, _ uintptr, src any)
func writebarrierfat10(dst *any, _ uintptr, src any)
func writebarrierfat11(dst *any, _ uintptr, src any)
func writebarrierfat001(dst *any, _ uintptr, src any)
func writebarrierfat010(dst *any, _ uintptr, src any)
func writebarrierfat011(dst *any, _ uintptr, src any)
func writebarrierfat100(dst *any, _ uintptr, src any)
func writebarrierfat101(dst *any, _ uintptr, src any)
func writebarrierfat110(dst *any, _ uintptr, src any)
func writebarrierfat111(dst *any, _ uintptr, src any)
func writebarrierfat0001(dst *any, _ uintptr, src any)
func writebarrierfat0010(dst *any, _ uintptr, src any)
func writebarrierfat0011(dst *any, _ uintptr, src any)
func writebarrierfat0100(dst *any, _ uintptr, src any)
func writebarrierfat0101(dst *any, _ uintptr, src any)
func writebarrierfat0110(dst *any, _ uintptr, src any)
func writebarrierfat0111(dst *any, _ uintptr, src any)
func writebarrierfat1000(dst *any, _ uintptr, src any)
func writebarrierfat1001(dst *any, _ uintptr, src any)
func writebarrierfat1010(dst *any, _ uintptr, src any)
func writebarrierfat1011(dst *any, _ uintptr, src any)
func writebarrierfat1100(dst *any, _ uintptr, src any)
func writebarrierfat1101(dst *any, _ uintptr, src any)
func writebarrierfat1110(dst *any, _ uintptr, src any)
func writebarrierfat1111(dst *any, _ uintptr, src any)
// *byte is really *runtime.Type
func typedmemmove(typ *byte, dst *any, src *any)
......
src/cmd/compile/internal/gc/order.go
View file @ deb83d06
......@@ -422,6 +422,8 @@ func ordermapassign(n *Node, order *Order) {
order.out = append(order.out, n)
// We call writebarrierfat only for values > 4 pointers long. See walk.go.
// TODO(mdempsky): writebarrierfat doesn't exist anymore, but removing that
// logic causes net/http's tests to become flaky; see CL 21242.
if (n.Left.Op == OINDEXMAP || (needwritebarrier(n.Left, n.Right) && n.Left.Type.Width > int64(4*Widthptr))) && !isaddrokay(n.Right) {
m := n.Left
n.Left = ordertemp(m.Type, order, false)
......
src/runtime/mbarrier.go
View file @ deb83d06
......@@ -159,31 +159,6 @@ func writebarrierptr_nostore(dst *uintptr, src uintptr) {
writebarrierptr_nostore1(dst, src)
}
//go:nosplit
func writebarrierstring(dst *[2]uintptr, src [2]uintptr) {
writebarrierptr(&dst[0], src[0])
dst[1] = src[1]
}
//go:nosplit
func writebarrierslice(dst *[3]uintptr, src [3]uintptr) {
writebarrierptr(&dst[0], src[0])
dst[1] = src[1]
dst[2] = src[2]
}
//go:nosplit
func writebarrieriface(dst *[2]uintptr, src [2]uintptr) {
writebarrierptr(&dst[0], src[0])
writebarrierptr(&dst[1], src[1])
}
//go:generate go run wbfat_gen.go -- wbfat.go
//
// The above line generates multiword write barriers for
// all the combinations of ptr+scalar up to four words.
// The implementations are written to wbfat.go.
// typedmemmove copies a value of type t to dst from src.
//go:nosplit
func typedmemmove(typ *_type, dst, src unsafe.Pointer) {
......
src/runtime/wbfat.go deleted 100644 → 0
View file @ 361b334c
// generated by wbfat_gen.go; use go generate
package runtime
//go:nosplit
func writebarrierfat01(dst *[2]uintptr, _ uintptr, src [2]uintptr) {
dst[0] = src[0]
writebarrierptr(&dst[1], src[1])
}
//go:nosplit
func writebarrierfat10(dst *[2]uintptr, _ uintptr, src [2]uintptr) {
writebarrierptr(&dst[0], src[0])
dst[1] = src[1]
}
//go:nosplit
func writebarrierfat11(dst *[2]uintptr, _ uintptr, src [2]uintptr) {
writebarrierptr(&dst[0], src[0])
writebarrierptr(&dst[1], src[1])
}
//go:nosplit
func writebarrierfat001(dst *[3]uintptr, _ uintptr, src [3]uintptr) {
dst[0] = src[0]
dst[1] = src[1]
writebarrierptr(&dst[2], src[2])
}
//go:nosplit
func writebarrierfat010(dst *[3]uintptr, _ uintptr, src [3]uintptr) {
dst[0] = src[0]
writebarrierptr(&dst[1], src[1])
dst[2] = src[2]
}
//go:nosplit
func writebarrierfat011(dst *[3]uintptr, _ uintptr, src [3]uintptr) {
dst[0] = src[0]
writebarrierptr(&dst[1], src[1])
writebarrierptr(&dst[2], src[2])
}
//go:nosplit
func writebarrierfat100(dst *[3]uintptr, _ uintptr, src [3]uintptr) {
writebarrierptr(&dst[0], src[0])
dst[1] = src[1]
dst[2] = src[2]
}
//go:nosplit
func writebarrierfat101(dst *[3]uintptr, _ uintptr, src [3]uintptr) {
writebarrierptr(&dst[0], src[0])
dst[1] = src[1]
writebarrierptr(&dst[2], src[2])
}
//go:nosplit
func writebarrierfat110(dst *[3]uintptr, _ uintptr, src [3]uintptr) {
writebarrierptr(&dst[0], src[0])
writebarrierptr(&dst[1], src[1])
dst[2] = src[2]
}
//go:nosplit
func writebarrierfat111(dst *[3]uintptr, _ uintptr, src [3]uintptr) {
writebarrierptr(&dst[0], src[0])
writebarrierptr(&dst[1], src[1])
writebarrierptr(&dst[2], src[2])
}
//go:nosplit
func writebarrierfat0001(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
dst[0] = src[0]
dst[1] = src[1]
dst[2] = src[2]
writebarrierptr(&dst[3], src[3])
}
//go:nosplit
func writebarrierfat0010(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
dst[0] = src[0]
dst[1] = src[1]
writebarrierptr(&dst[2], src[2])
dst[3] = src[3]
}
//go:nosplit
func writebarrierfat0011(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
dst[0] = src[0]
dst[1] = src[1]
writebarrierptr(&dst[2], src[2])
writebarrierptr(&dst[3], src[3])
}
//go:nosplit
func writebarrierfat0100(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
dst[0] = src[0]
writebarrierptr(&dst[1], src[1])
dst[2] = src[2]
dst[3] = src[3]
}
//go:nosplit
func writebarrierfat0101(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
dst[0] = src[0]
writebarrierptr(&dst[1], src[1])
dst[2] = src[2]
writebarrierptr(&dst[3], src[3])
}
//go:nosplit
func writebarrierfat0110(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
dst[0] = src[0]
writebarrierptr(&dst[1], src[1])
writebarrierptr(&dst[2], src[2])
dst[3] = src[3]
}
//go:nosplit
func writebarrierfat0111(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
dst[0] = src[0]
writebarrierptr(&dst[1], src[1])
writebarrierptr(&dst[2], src[2])
writebarrierptr(&dst[3], src[3])
}
//go:nosplit
func writebarrierfat1000(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
writebarrierptr(&dst[0], src[0])
dst[1] = src[1]
dst[2] = src[2]
dst[3] = src[3]
}
//go:nosplit
func writebarrierfat1001(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
writebarrierptr(&dst[0], src[0])
dst[1] = src[1]
dst[2] = src[2]
writebarrierptr(&dst[3], src[3])
}
//go:nosplit
func writebarrierfat1010(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
writebarrierptr(&dst[0], src[0])
dst[1] = src[1]
writebarrierptr(&dst[2], src[2])
dst[3] = src[3]
}
//go:nosplit
func writebarrierfat1011(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
writebarrierptr(&dst[0], src[0])
dst[1] = src[1]
writebarrierptr(&dst[2], src[2])
writebarrierptr(&dst[3], src[3])
}
//go:nosplit
func writebarrierfat1100(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
writebarrierptr(&dst[0], src[0])
writebarrierptr(&dst[1], src[1])
dst[2] = src[2]
dst[3] = src[3]
}
//go:nosplit
func writebarrierfat1101(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
writebarrierptr(&dst[0], src[0])
writebarrierptr(&dst[1], src[1])
dst[2] = src[2]
writebarrierptr(&dst[3], src[3])
}
//go:nosplit
func writebarrierfat1110(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
writebarrierptr(&dst[0], src[0])
writebarrierptr(&dst[1], src[1])
writebarrierptr(&dst[2], src[2])
dst[3] = src[3]
}
//go:nosplit
func writebarrierfat1111(dst *[4]uintptr, _ uintptr, src [4]uintptr) {
writebarrierptr(&dst[0], src[0])
writebarrierptr(&dst[1], src[1])
writebarrierptr(&dst[2], src[2])
writebarrierptr(&dst[3], src[3])
}
src/runtime/wbfat_gen.go deleted 100644 → 0
View file @ 361b334c
// Copyright 2014 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.
// +build ignore
package main
import (
"flag"
"fmt"
"log"
"os"
)
func main() {
flag.Parse()
if flag.NArg() > 0 {
f, err := os.Create(flag.Arg(0))
if err != nil {
log.Fatal(err)
}
os.Stdout = f
}
fmt.Printf("// generated by wbfat_gen.go; use go generate\n\n")
fmt.Printf("package runtime\n")
for i := uint(2); i <= 4; i++ {
for j := 1; j < 1<<i; j++ {
fmt.Printf("\n//go:nosplit\n")
fmt.Printf("func writebarrierfat%0*b(dst *[%d]uintptr, _ uintptr, src [%d]uintptr) {\n", int(i), j, i, i)
for k := uint(0); k < i; k++ {
if j&(1<<(i-1-k)) != 0 {
fmt.Printf("\twritebarrierptr(&dst[%d], src[%d])\n", k, k)
} else {
fmt.Printf("\tdst[%d] = src[%d]\n", k, k)
}
}
fmt.Printf("}\n")
}
}
}
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