#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 atoi(char *);
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ sleep(int);
int /*<<< orphan*/ stderr;
int main(int argc, char **argv) {
  int i, secs;
  if (argc != 2) {
    fprintf(stderr, "Usage: %s <n>\n", argv[0]);
    exit(0);
  }
  secs = atoi(argv[1]);
  for (i = 0; i < secs; i++)
    sleep(1);
  exit(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)
cmpl   $0x2,-0x8(%rbp)
je     1183 <main+0x43>
mov    0x2e79(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe89(%rip),%rsi
call   1030 <fprintf@plt>
xor    %edi,%edi
call   1050 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1040 <atoi@plt>
mov    %eax,-0x18(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x18(%rbp),%eax
jge    11be <main+0x7e>
mov    $0x1,%edi
call   1060 <sleep@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    119a <main+0x5a>
xor    %edi,%edi
call   1050 <exit@plt>

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    1176 <main+0x36>
mov    0x8(%rsi),%rdi
call   1040 <atoi@plt>
test   %eax,%eax
jle    116f <main+0x2f>
mov    %eax,%ebx
cs nopw 0x0(%rax,%rax,1)
nop
mov    $0x1,%edi
call   1060 <sleep@plt>
add    $0xffffffff,%ebx
jne    1160 <main+0x20>
xor    %edi,%edi
call   1050 <exit@plt>
mov    0x2e63(%rip),%rax
mov    (%rax),%edi
mov    (%rsi),%rdx
lea    0xe77(%rip),%rsi
call   1030 <fprintf@plt>
xor    %edi,%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [15 x i8] c"Usage: %s <n>\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp ne i32 %8, 2
br i1 %9, label %10, label %17
10: ; preds = %2
%11 = load i32, i32* @stderr
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 0
%14 = load i8*, i8** %13
%15 = call i32 @fprintf(i32 %11, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0), i8* %14)
%16 = call i32 @exit(i32 0)
unreachable
17: ; preds = %2
%18 = load i8**, i8*** %5
%19 = getelementptr inbounds i8*, i8** %18, i64 1
%20 = load i8*, i8** %19
%21 = call i32 @atoi(i8* %20)
store i32 %21, i32* %7
store i32 0, i32* %6
br label %22
22: ; preds = %28, %17
%23 = load i32, i32* %6
%24 = load i32, i32* %7
%25 = icmp slt i32 %23, %24
br i1 %25, label %26, label %31
26: ; preds = %22
%27 = call i32 @sleep(i32 1)
br label %28
28: ; preds = %26
%29 = load i32, i32* %6
%30 = add nsw i32 %29, 1
store i32 %30, i32* %6
br label %22
31: ; preds = %22
%32 = call i32 @exit(i32 0)
unreachable
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [15 x i8] c"Usage: %s <n>\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %9, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0), i8* %6)
%8 = tail call i32 @exit(i32 0)
unreachable
9: ; preds = %2
%10 = getelementptr inbounds i8*, i8** %1, i64 1
%11 = load i8*, i8** %10
%12 = tail call i32 @atoi(i8* %11)
%13 = icmp sgt i32 %12, 0
br i1 %13, label %14, label %19
14: ; preds = %9, %14
%15 = phi i32 [ %17, %14 ], [ 0, %9 ]
%16 = tail call i32 @sleep(i32 1)
%17 = add nuw nsw i32 %15, 1
%18 = icmp eq i32 %17, %12
br i1 %18, label %19, label %14
19: ; preds = %14, %9
%20 = tail call i32 @exit(i32 0)
unreachable
}