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https://github.com/golang/go
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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.
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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 main
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import "unsafe"
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const (
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smallInt = 42
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// For bigInt, we use a value that's too big for an int64, but still
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// fits in uint64. go/constant uses a different representation for
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// values larger than int64, but the cmd/asm parser can't parse
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// anything bigger than a uint64.
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bigInt = 0xffffffffffffffff
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stringVal = "test"
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longStringVal = "this_is_a_string_constant_longer_than_seventy_characters_which_used_to_fail_see_issue_50253"
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)
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var (
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smallIntAsm int64
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bigIntAsm uint64
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stringAsm [len(stringVal)]byte
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longStringAsm [len(longStringVal)]byte
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)
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type typ struct {
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a uint64
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b [100]uint8
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c uint8
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}
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var (
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typSize uint64
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typA, typB, typC uint64
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)
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func main() {
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if smallInt != smallIntAsm {
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println("smallInt", smallInt, "!=", smallIntAsm)
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}
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if bigInt != bigIntAsm {
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println("bigInt", uint64(bigInt), "!=", bigIntAsm)
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}
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if stringVal != string(stringAsm[:]) {
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println("stringVal", stringVal, "!=", string(stringAsm[:]))
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}
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if longStringVal != string(longStringAsm[:]) {
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println("longStringVal", longStringVal, "!=", string(longStringAsm[:]))
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}
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// We also include boolean consts in go_asm.h, but they're
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// defined to be "true" or "false", and it's not clear how to
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// use that in assembly.
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if want := unsafe.Sizeof(typ{}); want != uintptr(typSize) {
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println("typSize", want, "!=", typSize)
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}
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if want := unsafe.Offsetof(typ{}.a); want != uintptr(typA) {
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println("typA", want, "!=", typA)
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}
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if want := unsafe.Offsetof(typ{}.b); want != uintptr(typB) {
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println("typB", want, "!=", typB)
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}
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if want := unsafe.Offsetof(typ{}.c); want != uintptr(typC) {
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println("typC", want, "!=", typC)
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}
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}
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