i suppose can either take a small performance hit, keep it in the same compilation unit, or the language could support cross compilation unit inlining, (this could work via the source, it doesn’t have to be link time), regardless they’re no worse off for having the tools
![A screenshot of godbolt compiler explorer, the C code shows a simple static map function using a for loop, a static square function, and a test function that calls map square on an array. The assembly is very simple, the calls to square and map have been inlined.
The C code reads:
#include <stddef.h>
static void map(const int *in, int *out, size_t n, int (*f)(int)) {
for (size_t i = 0; i < n; i++)
out[i] = f(in[i]);
}
static int square(int x) { return x * x; }
void test(const int *in, int *out, size_t n) {
map(in, out, 5, square);
}
The assembly reads:
"test":
xor eax, eax
.L2:
mov edx, DWORD PTR [rdi+rax*4]
imul edx, edx
mov DWORD PTR [rsi+rax*4], edx
add rax, 1
cmp rax, 5
jne .L2
ret](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:bc7eepe7hsau3j7ggepcfsru/bafkreiak3bjfe223sqmezpu4w7xfsl5yr4opqnbu5bthjphtuxh3sttgk4)
