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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
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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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// This file contains code generation tests related to the handling of
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// string types.
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func CountRunes(s string) int { // Issue #24923
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// amd64:`.*countrunes`
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return len([]rune(s))
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}
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func ToByteSlice() []byte { // Issue #24698
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// amd64:`LEAQ\ttype\.\[3\]uint8`
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// amd64:`CALL\truntime\.newobject`
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// amd64:-`.*runtime.stringtoslicebyte`
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return []byte("foo")
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}
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// Loading from read-only symbols should get transformed into constants.
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func ConstantLoad() {
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// 12592 = 0x3130
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// 50 = 0x32
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// amd64:`MOVW\t\$12592, \(`,`MOVB\t\$50, 2\(`
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// 386:`MOVW\t\$12592, \(`,`MOVB\t\$50, 2\(`
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// arm:`MOVW\t\$48`,`MOVW\t\$49`,`MOVW\t\$50`
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// arm64:`MOVD\t\$12592`,`MOVD\t\$50`
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bsink = []byte("012")
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// 858927408 = 0x33323130
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// 13620 = 0x3534
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// amd64:`MOVL\t\$858927408`,`MOVW\t\$13620, 4\(`
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// 386:`MOVL\t\$858927408`,`MOVW\t\$13620, 4\(`
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// arm64:`MOVD\t\$858927408`,`MOVD\t\$13620`
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bsink = []byte("012345")
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// 3978425819141910832 = 0x3736353433323130
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// 7306073769690871863 = 0x6564636261393837
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// amd64:`MOVQ\t\$3978425819141910832`,`MOVQ\t\$7306073769690871863`
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// 386:`MOVL\t\$858927408, \(`,`DUFFCOPY`
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// arm64:`MOVD\t\$3978425819141910832`,`MOVD\t\$1650538808`,`MOVD\t\$25699`,`MOVD\t\$101`
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bsink = []byte("0123456789abcde")
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// 56 = 0x38
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// amd64:`MOVQ\t\$3978425819141910832`,`MOVB\t\$56`
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bsink = []byte("012345678")
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// 14648 = 0x3938
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// amd64:`MOVQ\t\$3978425819141910832`,`MOVW\t\$14648`
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bsink = []byte("0123456789")
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// 1650538808 = 0x62613938
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// amd64:`MOVQ\t\$3978425819141910832`,`MOVL\t\$1650538808`
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bsink = []byte("0123456789ab")
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}
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var bsink []byte
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