Re: [PATCH v7 2/2] tty: add rpmsg driver

[Joe Perches]

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