On Wed, 2020-03-25 at 14:31 +0100, Jiri Slaby wrote:
> The question was exactly about that: can a compiler optimize it to a
> bare number or will strlen call remain there?
$ cat str.c
#include <string.h>
int foo(void)
{
return strlen("abc");
}
$ gcc -c -O2 str.c
$ objdump -d str.o
str.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <foo>:
0: f3 0f 1e fa endbr64
4: b8 03 00 00 00 mov $0x3,%eax
9: c3 retq
