#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 execl(char *, char *, int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *);
int main(int argc, char **argv) {
  printf("je vais demander mon recouvrement par ls !\n");
  int i = execl("/bin/ls", "ls", NULL);
  if (i < 0)
    printf("Erreur de recouvrement !\n");
  else
    printf("Impossible !");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xec3(%rip),%rdi
call   1030 <printf@plt>
lea    0xee3(%rip),%rdi
lea    0xee1(%rip),%rsi
xor    %eax,%eax
mov    %eax,%edx
call   1040 <execl@plt>
mov    %eax,-0x14(%rbp)
cmpl   $0x0,-0x14(%rbp)
jge    1177 <main+0x57>
lea    0xec7(%rip),%rdi
call   1030 <printf@plt>
jmp    1183 <main+0x63>
lea    0xed0(%rip),%rdi
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xedd(%rip),%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
lea    0xeba(%rip),%rsi
xor    %edx,%edx
call   1050 <execl@plt>
test   %eax,%eax
js     1164 <main+0x34>
lea    0xeab(%rip),%rdi
call   1040 <printf@plt>
jmp    1170 <main+0x40>
lea    0xed5(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [44 x i8] c"je vais demander mon recouvrement par ls !\0A\00"
@.str.1 = [8 x i8] c"/bin/ls\00"
@.str.2 = [3 x i8] c"ls\00"
@.str.3 = [26 x i8] c"Erreur de recouvrement !\0A\00"
@.str.4 = [13 x i8] c"Impossible !\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = call i32 @printf(i8* getelementptr inbounds ([44 x i8], [44 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @execl(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* null)
store i32 %8, i32* %6
%9 = load i32, i32* %6
%10 = icmp slt i32 %9, 0
br i1 %10, label %11, label %13
11: ; preds = %2
%12 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0))
br label %15
13: ; preds = %2
%14 = call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.4, i64 0, i64 0))
br label %15
15: ; preds = %13, %11
%16 = load i32, i32* %3
ret i32 %16
}

LLVM IR (-O2):
@.str.1 = [8 x i8] c"/bin/ls\00"
@.str.2 = [3 x i8] c"ls\00"
@.str.4 = [13 x i8] c"Impossible !\00"
@str = [43 x i8] c"je vais demander mon recouvrement par ls !\00"
@str.5 = [25 x i8] c"Erreur de recouvrement !\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([43 x i8], [43 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 @execl(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* null)
%5 = icmp slt i32 %4, 0
br i1 %5, label %6, label %8
6: ; preds = %2
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @str.5, i64 0, i64 0))
br label %10
8: ; preds = %2
%9 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.4, i64 0, i64 0))
br label %10
10: ; preds = %8, %6
ret i32 0
}