#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 */
long atol(char *);
int /*<<< orphan*/ printf(char *, ...);
int syscall(int, ...);
int main(int argc, char *argv[]) {
  int i = 0;
  if (argc != 2) {
    printf("Pass Process ID as command line argument\n");
    return 0;
  }
  long pid = atol(argv[1]);
  printf("Process ID: %d\n", syscall(285));
  printf(" returned %d\n", syscall(289, pid));
  printf("Finished waiting");
  return 0;
}


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)
movl   $0x0,-0x14(%rbp)
cmpl   $0x2,-0x8(%rbp)
je     1171 <main+0x41>
lea    0xea2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
jmp    11d3 <main+0xa3>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1050 <atol@plt>
mov    %rax,-0x20(%rbp)
mov    $0x11d,%edi
mov    $0x0,%al
call   1040 <syscall@plt>
mov    %eax,%esi
lea    0xe93(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x20(%rbp),%rsi
mov    $0x121,%edi
mov    $0x0,%al
call   1040 <syscall@plt>
mov    %eax,%esi
lea    0xe83(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe83(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    119d <main+0x5d>
mov    0x8(%rsi),%rdi
call   1060 <atol@plt>
mov    %rax,%rbx
mov    $0x11d,%edi
xor    %eax,%eax
call   1050 <syscall@plt>
lea    0xe9b(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0x121,%edi
mov    %rbx,%rsi
xor    %eax,%eax
call   1050 <syscall@plt>
lea    0xe8c(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xe8a(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
jmp    11a9 <main+0x69>
lea    0xe8b(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [42 x i8] c"Pass Process ID as command line argument\0A\00"
@.str.1 = [16 x i8] c"Process ID: %d\0A\00"
@.str.2 = [14 x i8] c" returned %d\0A\00"
@.str.3 = [17 x i8] c"Finished waiting\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i64
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 0, i32* %6
%8 = load i32, i32* %4
%9 = icmp ne i32 %8, 2
br i1 %9, label %10, label %12
10: ; preds = %2
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %3
br label %23
12: ; preds = %2
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 1
%15 = load i8*, i8** %14
%16 = call i64 @atol(i8* %15)
store i64 %16, i64* %7
%17 = call i32 (i32, ...) @syscall(i32 285)
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %17)
%19 = load i64, i64* %7
%20 = call i32 (i32, ...) @syscall(i32 289, i64 %19)
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %20)
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0))
store i32 0, i32* %3
br label %23
23: ; preds = %12, %10
%24 = load i32, i32* %3
ret i32 %24
}

LLVM IR (-O2):
@.str.1 = [16 x i8] c"Process ID: %d\0A\00"
@.str.2 = [14 x i8] c" returned %d\0A\00"
@.str.3 = [17 x i8] c"Finished waiting\00"
@str = [41 x i8] c"Pass Process ID as command line argument\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %6, label %4
4: ; preds = %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([41 x i8], [41 x i8]* @str, i64 0, i64 0))
br label %15
6: ; preds = %2
%7 = getelementptr inbounds i8*, i8** %1, i64 1
%8 = load i8*, i8** %7
%9 = tail call i64 @atol(i8* %8)
%10 = tail call i32 (i32, ...) @syscall(i32 285)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %10)
%12 = tail call i32 (i32, ...) @syscall(i32 289, i64 %9)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %12)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0))
br label %15
15: ; preds = %6, %4
ret i32 0
}