mirror of
https://github.com/golang/go
synced 2024-11-17 13:44:43 -07:00
401d7e5a24
In ABIInternal, reserve X15 as constant zero, and use it to zero memory. (Maybe there can be more use of it?) The register is zeroed when transition to ABIInternal from ABI0. Caveat: using X15 generates longer instructions than using X0. Maybe we want to use X0? Change-Id: I12d5ee92a01fc0b59dad4e5ab023ac71bc2a8b7d Reviewed-on: https://go-review.googlesource.com/c/go/+/288093 Trust: Cherry Zhang <cherryyz@google.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
47 lines
887 B
Go
47 lines
887 B
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
|
|
// struct types.
|
|
|
|
// ------------- //
|
|
// Zeroing //
|
|
// ------------- //
|
|
|
|
type Z1 struct {
|
|
a, b, c int
|
|
}
|
|
|
|
func Zero1(t *Z1) { // Issue #18370
|
|
// amd64:`MOVUPS\tX[0-9]+, \(.*\)`,`MOVQ\t\$0, 16\(.*\)`
|
|
*t = Z1{}
|
|
}
|
|
|
|
type Z2 struct {
|
|
a, b, c *int
|
|
}
|
|
|
|
func Zero2(t *Z2) {
|
|
// amd64:`MOVUPS\tX[0-9]+, \(.*\)`,`MOVQ\t\$0, 16\(.*\)`
|
|
// amd64:`.*runtime[.]gcWriteBarrier.*\(SB\)`
|
|
*t = Z2{}
|
|
}
|
|
|
|
// ------------------ //
|
|
// Initializing //
|
|
// ------------------ //
|
|
|
|
type I1 struct {
|
|
a, b, c, d int
|
|
}
|
|
|
|
func Init1(p *I1) { // Issue #18872
|
|
// amd64:`MOVQ\t[$]1`,`MOVQ\t[$]2`,`MOVQ\t[$]3`,`MOVQ\t[$]4`
|
|
*p = I1{1, 2, 3, 4}
|
|
}
|