vs11 beta x64对齐_int64每8字节变量0x20字节 [英] vs11 beta x64 alignment of _int64 0x20 bytes per 8 byte variable

问题描述

在

int _tmain(int argc, _TCHAR* argv[])
{
	_int64 ia = (_int64) 0x45678;
	_int64 ib =  (_int64) 0x7fffffff00000000;
	_int64 ic = (_int64) 0x1;  
	// addrefi(&ia,&ib,&ic);
          // ....

每个_int64需要0x20个字节，如

it takes 0x20 bytes per _int64 as in

& ia  0x00000000001bf8e8 {0xcccccccccccccccc }  __ int64 *

& ib  0x00000000001bf908 {0xcccccccccccccccc}  __ int64 *

& ic  0x00000000001bf928 {0xcccccccccccccccc}  __ int64 *

&ia 0x00000000001bf8e8 {0xcccccccccccccccc} __int64 *
&ib 0x00000000001bf908 {0xcccccccccccccccc} __int64 *
&ic 0x00000000001bf928 {0xcccccccccccccccc} __int64 *

我想知道为什么这么少以及如何打包得更好？

which I wondered why so much for so little and how it might be packed better?

推荐答案

可能是其他数据需要执行一些运行时完整性检查。尝试在发布模式下编译，更改/ RTC编译器选项，或在函数前添加此声明：

Probably additional data are required to perform some run-time integrity checks. Try compiling in release mode, change /RTC compiler options, or add this declaration before the function:

＃pragma
runtime_checks （ " scu" ，
< span style ="background：white; color：blue; font-family：Consolas; font-size：9.5pt"> off ）

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