c - 我如何告诉 gcc 不要内联函数？

Question

假设我在源文件中有这个小函数

static void foo() {}

我构建了二进制文件的优化版本，但我不希望内联此函数(出于优化目的)。我可以在源代码中添加一个宏来防止内联吗？

Answer 1

您想要gcc特定的noinline属性。

This function attribute prevents a function from being considered for inlining. If the function does not have side-effects, there are optimizations other than inlining that causes function calls to be optimized away, although the function call is live. To keep such calls from being optimized away, put asm ("");

像这样使用它:

void __attribute__ ((noinline)) foo() 
{
  ...
}