#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ print_string(char **);
int /*<<< orphan*/ printf(char *, char *);
void main() {
  char string1[100] = "123qweasd";
  printf("string before:%s;\n", string1);
  print_string(&string1);
  printf("string after:%s;\n", string1);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x70,%rsp
lea    -0x70(%rbp),%rdi
lea    0xebd(%rip),%rsi
mov    $0x64,%edx
call   1050 <memcpy@plt>
lea    -0x70(%rbp),%rsi
lea    0xf0c(%rip),%rdi
call   1030 <printf@plt>
lea    -0x70(%rbp),%rdi
call   1040 <print_string@plt>
lea    -0x70(%rbp),%rsi
lea    0xf06(%rip),%rdi
call   1030 <printf@plt>
add    $0x70,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x70,%rsp
movaps 0xf24(%rip),%xmm0
movaps %xmm0,0x50(%rsp)
movaps 0xf08(%rip),%xmm0
movaps %xmm0,0x40(%rsp)
movaps 0xeec(%rip),%xmm0
movaps %xmm0,0x30(%rsp)
movaps 0xed0(%rip),%xmm0
movaps %xmm0,0x20(%rsp)
movaps 0xeb4(%rip),%xmm0
movaps %xmm0,0x10(%rsp)
movaps 0xe98(%rip),%xmm0
movaps %xmm0,(%rsp)
movl   $0x0,0x60(%rsp)
lea    0xee9(%rip),%rdi
mov    %rsp,%rbx
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    %rbx,%rdi
call   1040 <print_string@plt>
lea    0xee2(%rip),%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
add    $0x70,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@__const.main.string1 = [100 x i8] c"123qweasd\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00"
@.str = [19 x i8] c"string before:%s;\0A\00"
@.str.1 = [18 x i8] c"string after:%s;\0A\00"
define void @main() {
%1 = alloca [100 x i8]
%2 = bitcast [100 x i8]* %1 to i8*
%3 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%4 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i8* %3)
%5 = bitcast [100 x i8]* %1 to i8**
%6 = call i32 @print_string(i8** %5)
%7 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%8 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), i8* %7)
ret void
}

LLVM IR (-O2):
@__const.main.string1 = [100 x i8] c"123qweasd\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00"
@.str = [19 x i8] c"string before:%s;\0A\00"
@.str.1 = [18 x i8] c"string after:%s;\0A\00"
define void @main() {
%1 = alloca [100 x i8]
%2 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%3 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i8* %2)
%4 = bitcast [100 x i8]* %1 to i8**
%5 = call i32 @print_string(i8** %4)
%6 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), i8* %2)
ret void
}