#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*/ printf(char *, ...);
int /*<<< orphan*/ sleep(int);
int main(int argc, char *argv[]) {
  int sleepSeconds = 1;
  if (argc > 1) {
    sleepSeconds = atoi(argv[1]);
  }
  printf("Going to sleep for %d seconds\n", sleepSeconds);
  sleep(sleepSeconds);
  printf("Waking up\n");
  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   $0x1,-0x14(%rbp)
cmpl   $0x1,-0x8(%rbp)
jle    1167 <main+0x37>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1040 <atoi@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%esi
lea    0xe8f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%edi
call   1050 <sleep@plt>
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
mov    $0x1,%ebx
cmp    $0x2,%edi
jl     1156 <main+0x16>
mov    0x8(%rsi),%rdi
call   1050 <atoi@plt>
mov    %eax,%ebx
lea    0xea3(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %ebx,%edi
call   1060 <sleep@plt>
lea    0xeab(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [31 x i8] c"Going to sleep for %d seconds\0A\00"
@.str.1 = [11 x i8] c"Waking up\0A\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
store i32 1, i32* %6
%7 = load i32, i32* %4
%8 = icmp sgt i32 %7, 1
br i1 %8, label %9, label %14
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 1
%12 = load i8*, i8** %11
%13 = call i32 @atoi(i8* %12)
store i32 %13, i32* %6
br label %14
14: ; preds = %9, %2
%15 = load i32, i32* %6
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str, i64 0, i64 0), i32 %15)
%17 = load i32, i32* %6
%18 = call i32 @sleep(i32 %17)
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [31 x i8] c"Going to sleep for %d seconds\0A\00"
@str = [10 x i8] c"Waking up\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp sgt i32 %0, 1
br i1 %3, label %4, label %8
4: ; preds = %2
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
%7 = tail call i32 @atoi(i8* %6)
br label %8
8: ; preds = %4, %2
%9 = phi i32 [ %7, %4 ], [ 1, %2 ]
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([31 x i8], [31 x i8]* @.str, i64 0, i64 0), i32 %9)
%11 = tail call i32 @sleep(i32 %9)
%12 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @str, i64 0, i64 0))
ret i32 0
}