mirror of
https://github.com/golang/go
synced 2024-11-06 15:26:13 -07:00
0ad332d80c
For moves >8,<16 bytes, do a move using non-overlapping loads/stores if it would require no more instructions. This helps a bit with the case when the move is from a static constant, because then the code to materialize the value being moved is smaller. Change-Id: Ie47a5a7c654afeb4973142b0a9922faea13c9b54 Reviewed-on: https://go-review.googlesource.com/c/146019 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
62 lines
1.8 KiB
Go
62 lines
1.8 KiB
Go
// 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
|
|
|
|
// This file contains code generation tests related to the handling of
|
|
// string types.
|
|
|
|
func CountRunes(s string) int { // Issue #24923
|
|
// amd64:`.*countrunes`
|
|
return len([]rune(s))
|
|
}
|
|
|
|
func ToByteSlice() []byte { // Issue #24698
|
|
// amd64:`LEAQ\ttype\.\[3\]uint8`
|
|
// amd64:`CALL\truntime\.newobject`
|
|
// amd64:-`.*runtime.stringtoslicebyte`
|
|
return []byte("foo")
|
|
}
|
|
|
|
// Loading from read-only symbols should get transformed into constants.
|
|
func ConstantLoad() {
|
|
// 12592 = 0x3130
|
|
// 50 = 0x32
|
|
// amd64:`MOVW\t\$12592, \(`,`MOVB\t\$50, 2\(`
|
|
// 386:`MOVW\t\$12592, \(`,`MOVB\t\$50, 2\(`
|
|
// arm:`MOVW\t\$48`,`MOVW\t\$49`,`MOVW\t\$50`
|
|
// arm64:`MOVD\t\$12592`,`MOVD\t\$50`
|
|
bsink = []byte("012")
|
|
|
|
// 858927408 = 0x33323130
|
|
// 13620 = 0x3534
|
|
// amd64:`MOVL\t\$858927408`,`MOVW\t\$13620, 4\(`
|
|
// 386:`MOVL\t\$858927408`,`MOVW\t\$13620, 4\(`
|
|
// arm64:`MOVD\t\$858927408`,`MOVD\t\$13620`
|
|
bsink = []byte("012345")
|
|
|
|
// 3978425819141910832 = 0x3736353433323130
|
|
// 7306073769690871863 = 0x6564636261393837
|
|
// amd64:`MOVQ\t\$3978425819141910832`,`MOVQ\t\$7306073769690871863`
|
|
// 386:`MOVL\t\$858927408, \(`,`DUFFCOPY`
|
|
// arm64:`MOVD\t\$3978425819141910832`,`MOVD\t\$1650538808`,`MOVD\t\$25699`,`MOVD\t\$101`
|
|
bsink = []byte("0123456789abcde")
|
|
|
|
// 56 = 0x38
|
|
// amd64:`MOVQ\t\$3978425819141910832`,`MOVB\t\$56`
|
|
bsink = []byte("012345678")
|
|
|
|
// 14648 = 0x3938
|
|
// amd64:`MOVQ\t\$3978425819141910832`,`MOVW\t\$14648`
|
|
bsink = []byte("0123456789")
|
|
|
|
// 1650538808 = 0x62613938
|
|
// amd64:`MOVQ\t\$3978425819141910832`,`MOVL\t\$1650538808`
|
|
bsink = []byte("0123456789ab")
|
|
}
|
|
|
|
var bsink []byte
|