go/src/cmd/compile/internal/gc/sizeof_test.go
Matthew Dempsky 40f1d0ca9f cmd/compile: split TSLICE into separate Type kind
Instead of using TARRAY for both arrays and slices, create a new
TSLICE kind to handle slices.

Also, get rid of the "DDDArray" distinction. While kinda ugly, it
seems likely we'll need to defer evaluating the constant bounds
expressions for golang.org/issue/13890.

Passes toolstash/buildall.

Change-Id: I8e45d4900e7df3a04cce59428ec8b38035d3cc3a
Reviewed-on: https://go-review.googlesource.com/22329
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-04-21 21:03:22 +00:00

56 lines
1.2 KiB
Go

// Copyright 2016 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.
// +build !nacl
package gc
import (
"reflect"
"testing"
"unsafe"
)
// Assert that the size of important structures do not change unexpectedly.
func TestSizeof(t *testing.T) {
const _64bit = unsafe.Sizeof(uintptr(0)) == 8
var tests = []struct {
val interface{} // type as a value
_32bit uintptr // size on 32bit platforms
_64bit uintptr // size on 64bit platforms
}{
{Flow{}, 52, 88},
{Func{}, 96, 168},
{Name{}, 52, 80},
{Node{}, 92, 144},
{Sym{}, 60, 112},
{Type{}, 52, 80},
{MapType{}, 20, 40},
{ForwardType{}, 16, 32},
{FuncType{}, 28, 48},
{StructType{}, 12, 24},
{InterType{}, 4, 8},
{ChanType{}, 8, 16},
{ArrayType{}, 16, 24},
{InterMethType{}, 4, 8},
{DDDFieldType{}, 4, 8},
{FuncArgsType{}, 4, 8},
{ChanArgsType{}, 4, 8},
{PtrType{}, 4, 8},
{SliceType{}, 4, 8},
}
for _, tt := range tests {
want := tt._32bit
if _64bit {
want = tt._64bit
}
got := reflect.TypeOf(tt.val).Size()
if want != got {
t.Errorf("unsafe.Sizeof(%T) = %d, want %d", tt.val, got, want)
}
}
}