如何查看由 gcc（任何风格）编译器为 C/C++ 程序生成的汇编代码？
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How can I see the assembly code that is generated by a gcc (any flavor) compiler for a C/C++ program?
提问by vehomzzz
I am trying to optimize a lot of multiplications and pointer arithmetics and would like to see what the compiler does underneath when I put in optimization flags.
我正在尝试优化很多乘法和指针算术，并希望看到当我放入优化标志时编译器在下面做了什么。
--Edit--
- 编辑 -
How to restrict it to a specific function or a code block?
如何将其限制为特定功能或代码块？
--Edit_2--
--编辑_2--
How to let gcc generate a less verbose assembly-code?
如何让 gcc 生成不那么冗长的汇编代码？
回答by P Shved
Add -Sswitch to your command line.
将-Sswitch添加到命令行。
Edit: Do not forget that it will place the assembly to the files you specified under -oswitch.
编辑：不要忘记它会将程序集放置到您在-oswitch下指定的文件中。
回答by ChrisW
How to restrict it to a specific function or a code block?
如何将其限制为特定功能或代码块？
Put that function in a separate source file (and use a different command-line parameter for that one source file).
将该函数放在单独的源文件中（并为该源文件使用不同的命令行参数）。
回答by Chris
You could also run that program in a debugger like gdband use a disassembly view. In gdbyou could use the command disass/mto view the assembly mixed with the C code on the current location.
您还可以在调试器中运行该程序gdb并使用反汇编视图。在gdb可以使用的命令disass/m来查看与当前位置的C代码组件的混合。
回答by sean riley
You could stop you program at a breakpoint in the Visual Studio debugger and do "show assembly" and even step through it one instruction at a time.
您可以在 Visual Studio 调试器中的断点处停止编程并执行“显示程序集”，甚至一次单步执行一条指令。
