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go/test/codegen/alloc.go

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cmd/compile: don't generate newobject call for 0-sized types Emit &runtime.zerobase instead of a call to newobject for allocations of zero sized objects in walk.go. Fixes #29446 Change-Id: I11b67981d55009726a17c2e582c12ce0c258682e Reviewed-on: https://go-review.googlesource.com/c/155840 Run-TryBot: Iskander Sharipov <quasilyte@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> Reviewed-by: Keith Randall <khr@golang.org>
2018-12-28 21:40:04 +03:00
// 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.
// These tests check that allocating a 0-size object does not
// introduce a call to runtime.newobject.
package codegen
func zeroAllocNew1() *struct{} {
test/codegen: simplify asmcheck pattern matching Separate patterns in asmcheck by spaces instead of commas. Many patterns end in comma (like "MOV [$]123,") so separating patterns by comma is not great; they're already quoted, so spaces are fine. Also replace all tabs in the assembly lines with spaces before matching. Finally, replace \$ or \\$ with [$] as the matching idiom. The effect of all these is to make the patterns look like: // amd64:"BSFQ" "ORQ [$]256" instead of the old: // amd64:"BSFQ","ORQ\t\\$256" Update all tests as well. Change-Id: Ia39febe5d7f67ba115846422789e11b185d5c807 Reviewed-on: https://go-review.googlesource.com/c/go/+/716060 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Alan Donovan <adonovan@google.com> Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
2025-10-26 22:51:14 -04:00
// 386:-`CALL runtime\.newobject`, `LEAL runtime.zerobase`
// amd64:-`CALL runtime\.newobject`, `LEAQ runtime.zerobase`
// arm:-`CALL runtime\.newobject`, `MOVW [$]runtime.zerobase`
// arm64:-`CALL runtime\.newobject`, `MOVD [$]runtime.zerobase`
// riscv64:-`CALL runtime\.newobject`, `MOV [$]runtime.zerobase`
cmd/compile: don't generate newobject call for 0-sized types Emit &runtime.zerobase instead of a call to newobject for allocations of zero sized objects in walk.go. Fixes #29446 Change-Id: I11b67981d55009726a17c2e582c12ce0c258682e Reviewed-on: https://go-review.googlesource.com/c/155840 Run-TryBot: Iskander Sharipov <quasilyte@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> Reviewed-by: Keith Randall <khr@golang.org>
2018-12-28 21:40:04 +03:00
return new(struct{})
}
func zeroAllocNew2() *[0]int {
test/codegen: simplify asmcheck pattern matching Separate patterns in asmcheck by spaces instead of commas. Many patterns end in comma (like "MOV [$]123,") so separating patterns by comma is not great; they're already quoted, so spaces are fine. Also replace all tabs in the assembly lines with spaces before matching. Finally, replace \$ or \\$ with [$] as the matching idiom. The effect of all these is to make the patterns look like: // amd64:"BSFQ" "ORQ [$]256" instead of the old: // amd64:"BSFQ","ORQ\t\\$256" Update all tests as well. Change-Id: Ia39febe5d7f67ba115846422789e11b185d5c807 Reviewed-on: https://go-review.googlesource.com/c/go/+/716060 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Alan Donovan <adonovan@google.com> Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
2025-10-26 22:51:14 -04:00
// 386:-`CALL runtime\.newobject`, `LEAL runtime.zerobase`
// amd64:-`CALL runtime\.newobject`, `LEAQ runtime.zerobase`
// arm:-`CALL runtime\.newobject`, `MOVW [$]runtime.zerobase`
// arm64:-`CALL runtime\.newobject`, `MOVD [$]runtime.zerobase`
// riscv64:-`CALL runtime\.newobject`, `MOV [$]runtime.zerobase`
cmd/compile: don't generate newobject call for 0-sized types Emit &runtime.zerobase instead of a call to newobject for allocations of zero sized objects in walk.go. Fixes #29446 Change-Id: I11b67981d55009726a17c2e582c12ce0c258682e Reviewed-on: https://go-review.googlesource.com/c/155840 Run-TryBot: Iskander Sharipov <quasilyte@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> Reviewed-by: Keith Randall <khr@golang.org>
2018-12-28 21:40:04 +03:00
return new([0]int)
}
func zeroAllocSliceLit() []int {
test/codegen: simplify asmcheck pattern matching Separate patterns in asmcheck by spaces instead of commas. Many patterns end in comma (like "MOV [$]123,") so separating patterns by comma is not great; they're already quoted, so spaces are fine. Also replace all tabs in the assembly lines with spaces before matching. Finally, replace \$ or \\$ with [$] as the matching idiom. The effect of all these is to make the patterns look like: // amd64:"BSFQ" "ORQ [$]256" instead of the old: // amd64:"BSFQ","ORQ\t\\$256" Update all tests as well. Change-Id: Ia39febe5d7f67ba115846422789e11b185d5c807 Reviewed-on: https://go-review.googlesource.com/c/go/+/716060 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Alan Donovan <adonovan@google.com> Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
2025-10-26 22:51:14 -04:00
// 386:-`CALL runtime\.newobject`, `LEAL runtime.zerobase`
// amd64:-`CALL runtime\.newobject`, `LEAQ runtime.zerobase`
// arm:-`CALL runtime\.newobject`, `MOVW [$]runtime.zerobase`
// arm64:-`CALL runtime\.newobject`, `MOVD [$]runtime.zerobase`
// riscv64:-`CALL runtime\.newobject`, `MOV [$]runtime.zerobase`
cmd/compile: don't generate newobject call for 0-sized types Emit &runtime.zerobase instead of a call to newobject for allocations of zero sized objects in walk.go. Fixes #29446 Change-Id: I11b67981d55009726a17c2e582c12ce0c258682e Reviewed-on: https://go-review.googlesource.com/c/155840 Run-TryBot: Iskander Sharipov <quasilyte@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> Reviewed-by: Keith Randall <khr@golang.org>
2018-12-28 21:40:04 +03:00
return []int{}
}
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