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![Cherry Zhang](/assets/img/avatar_default.png)
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
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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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// struct types.
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// ------------- //
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// Zeroing //
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// ------------- //
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type Z1 struct {
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a, b, c int
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}
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func Zero1(t *Z1) { // Issue #18370
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// amd64:`MOVUPS\tX[0-9]+, \(.*\)`,`MOVQ\t\$0, 16\(.*\)`
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*t = Z1{}
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}
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type Z2 struct {
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a, b, c *int
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}
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func Zero2(t *Z2) {
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// amd64:`MOVUPS\tX[0-9]+, \(.*\)`,`MOVQ\t\$0, 16\(.*\)`
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// amd64:`.*runtime[.]gcWriteBarrier.*\(SB\)`
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*t = Z2{}
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}
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// ------------------ //
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// Initializing //
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// ------------------ //
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type I1 struct {
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a, b, c, d int
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}
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func Init1(p *I1) { // Issue #18872
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// amd64:`MOVQ\t[$]1`,`MOVQ\t[$]2`,`MOVQ\t[$]3`,`MOVQ\t[$]4`
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*p = I1{1, 2, 3, 4}
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}
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