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b35c668072
Add rule to PPC64.rules to inline runtime.memmove in more cases, as is done for other target architectures Updated tests in codegen/copy.go to verify changes are done on ppc64/ppc64le Updates #41662 Change-Id: Id937ce21f9b4f4047b3e66dfa3c960128ee16a2a Reviewed-on: https://go-review.googlesource.com/c/go/+/352054 Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
168 lines
3.4 KiB
Go
168 lines
3.4 KiB
Go
// asmcheck
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package codegen
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import "runtime"
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// Check small copies are replaced with moves.
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func movesmall4() {
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x := [...]byte{1, 2, 3, 4}
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// 386:-".*memmove"
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// amd64:-".*memmove"
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// arm:-".*memmove"
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// arm64:-".*memmove"
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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copy(x[1:], x[:])
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}
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func movesmall7() {
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x := [...]byte{1, 2, 3, 4, 5, 6, 7}
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// 386:-".*memmove"
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// amd64:-".*memmove"
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// arm64:-".*memmove"
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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copy(x[1:], x[:])
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}
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func movesmall16() {
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x := [...]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
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// amd64:-".*memmove"
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// ppc64:".*memmove"
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// ppc64le:".*memmove"
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copy(x[1:], x[:])
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}
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var x [256]byte
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// Check that large disjoint copies are replaced with moves.
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func moveDisjointStack32() {
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var s [32]byte
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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// ppc64le/power8:"LXVD2X",-"ADD",-"BC"
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// ppc64le/power9:"LXV",-"LXVD2X",-"ADD",-"BC"
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copy(s[:], x[:32])
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runtime.KeepAlive(&s)
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}
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func moveDisjointStack64() {
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var s [96]byte
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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// ppc64le/power8:"LXVD2X","ADD","BC"
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// ppc64le/power9:"LXV",-"LXVD2X",-"ADD",-"BC"
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copy(s[:], x[:96])
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runtime.KeepAlive(&s)
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}
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func moveDisjointStack() {
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var s [256]byte
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// s390x:-".*memmove"
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// amd64:-".*memmove"
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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// ppc64le/power8:"LXVD2X"
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// ppc64le/power9:"LXV",-"LXVD2X"
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copy(s[:], x[:])
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runtime.KeepAlive(&s)
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}
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func moveDisjointArg(b *[256]byte) {
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var s [256]byte
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// s390x:-".*memmove"
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// amd64:-".*memmove"
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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// ppc64le/power8:"LXVD2X"
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// ppc64le/power9:"LXV",-"LXVD2X"
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copy(s[:], b[:])
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runtime.KeepAlive(&s)
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}
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func moveDisjointNoOverlap(a *[256]byte) {
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// s390x:-".*memmove"
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// amd64:-".*memmove"
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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// ppc64le/power8:"LXVD2X"
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// ppc64le/power9:"LXV",-"LXVD2X"
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copy(a[:], a[128:])
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}
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// Check arch-specific memmove lowering. See issue 41662 fot details
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func moveArchLowering1(b []byte, x *[1]byte) {
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_ = b[1]
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// amd64:-".*memmove"
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// arm64:-".*memmove"
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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copy(b, x[:])
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}
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func moveArchLowering2(b []byte, x *[2]byte) {
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_ = b[2]
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// amd64:-".*memmove"
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// arm64:-".*memmove"
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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copy(b, x[:])
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}
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func moveArchLowering4(b []byte, x *[4]byte) {
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_ = b[4]
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// amd64:-".*memmove"
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// arm64:-".*memmove"
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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copy(b, x[:])
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}
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func moveArchLowering8(b []byte, x *[8]byte) {
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_ = b[8]
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// amd64:-".*memmove"
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// arm64:-".*memmove"
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// ppc64:-".*memmove"
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// ppc64le:-".*memmove"
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copy(b, x[:])
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}
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func moveArchLowering16(b []byte, x *[16]byte) {
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_ = b[16]
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// amd64:-".*memmove"
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copy(b, x[:])
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}
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// Check that no branches are generated when the pointers are [not] equal.
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func ptrEqual() {
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// amd64:-"JEQ",-"JNE"
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// ppc64:-"BEQ",-"BNE"
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// ppc64le:-"BEQ",-"BNE"
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// s390x:-"BEQ",-"BNE"
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copy(x[:], x[:])
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}
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func ptrOneOffset() {
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// amd64:-"JEQ",-"JNE"
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// ppc64:-"BEQ",-"BNE"
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// ppc64le:-"BEQ",-"BNE"
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// s390x:-"BEQ",-"BNE"
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copy(x[1:], x[:])
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}
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func ptrBothOffset() {
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// amd64:-"JEQ",-"JNE"
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// ppc64:-"BEQ",-"BNE"
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// ppc64le:-"BEQ",-"BNE"
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// s390x:-"BEQ",-"BNE"
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copy(x[1:], x[2:])
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}
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