mirror of
https://github.com/golang/go
synced 2024-11-24 11:30:13 -07:00
8b9b365493
Fixes #50523 Change-Id: Idab1b44d106250e9301d90ee6571f0ea51242dd9 Reviewed-on: https://go-review.googlesource.com/c/go/+/377074 Trust: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Liz Fong-Jones <lizf@honeycomb.io> Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com> Trust: Emmanuel Odeke <emmanuel@orijtech.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
73 lines
1.8 KiB
Go
73 lines
1.8 KiB
Go
// Copyright 2021 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 main
|
|
|
|
import "unsafe"
|
|
|
|
const (
|
|
smallInt = 42
|
|
|
|
// For bigInt, we use a value that's too big for an int64, but still
|
|
// fits in uint64. go/constant uses a different representation for
|
|
// values larger than int64, but the cmd/asm parser can't parse
|
|
// anything bigger than a uint64.
|
|
bigInt = 0xffffffffffffffff
|
|
|
|
stringVal = "test"
|
|
|
|
longStringVal = "this_is_a_string_constant_longer_than_seventy_characters_which_used_to_fail_see_issue_50253"
|
|
)
|
|
|
|
var (
|
|
smallIntAsm int64
|
|
bigIntAsm uint64
|
|
stringAsm [len(stringVal)]byte
|
|
longStringAsm [len(longStringVal)]byte
|
|
)
|
|
|
|
type typ struct {
|
|
a uint64
|
|
b [100]uint8
|
|
c uint8
|
|
}
|
|
|
|
var (
|
|
typSize uint64
|
|
|
|
typA, typB, typC uint64
|
|
)
|
|
|
|
func main() {
|
|
if smallInt != smallIntAsm {
|
|
println("smallInt", smallInt, "!=", smallIntAsm)
|
|
}
|
|
if bigInt != bigIntAsm {
|
|
println("bigInt", uint64(bigInt), "!=", bigIntAsm)
|
|
}
|
|
if stringVal != string(stringAsm[:]) {
|
|
println("stringVal", stringVal, "!=", string(stringAsm[:]))
|
|
}
|
|
if longStringVal != string(longStringAsm[:]) {
|
|
println("longStringVal", longStringVal, "!=", string(longStringAsm[:]))
|
|
}
|
|
|
|
// We also include boolean consts in go_asm.h, but they're
|
|
// defined to be "true" or "false", and it's not clear how to
|
|
// use that in assembly.
|
|
|
|
if want := unsafe.Sizeof(typ{}); want != uintptr(typSize) {
|
|
println("typSize", want, "!=", typSize)
|
|
}
|
|
if want := unsafe.Offsetof(typ{}.a); want != uintptr(typA) {
|
|
println("typA", want, "!=", typA)
|
|
}
|
|
if want := unsafe.Offsetof(typ{}.b); want != uintptr(typB) {
|
|
println("typB", want, "!=", typB)
|
|
}
|
|
if want := unsafe.Offsetof(typ{}.c); want != uintptr(typC) {
|
|
println("typC", want, "!=", typC)
|
|
}
|
|
}
|