#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*/ handler();
int /*<<< orphan*/ printf(char *, int);
int /*<<< orphan*/ sleep(int);
void main() {
  int i;
  handler();
  for (i = 1; i < 21; i++) {
    printf("sleep %d ...\n", i);
    sleep(1);
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    $0x0,%al
call   1040 <handler@plt>
movl   $0x1,-0x4(%rbp)
cmpl   $0x15,-0x4(%rbp)
jge    1177 <main+0x47>
mov    -0x4(%rbp),%esi
lea    0xea6(%rip),%rdi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    -0x4(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x4(%rbp)
jmp    1146 <main+0x16>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
xor    %eax,%eax
call   1040 <handler@plt>
lea    0xec1(%rip),%rbx
mov    %rbx,%rdi
mov    $0x1,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0xa,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0xb,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0xc,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0xd,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0xe,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0xf,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x10,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x11,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x12,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x13,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <sleep@plt>
mov    %rbx,%rdi
mov    $0x14,%esi
call   1030 <printf@plt>
mov    $0x1,%edi
pop    %rbx
jmp    1050 <sleep@plt>

LLVM IR (-O0):
@.str = [14 x i8] c"sleep %d ...\0A\00"
define void @main() {
%1 = alloca i32
%2 = call i32 (...) @handler()
store i32 1, i32* %1
br label %3
3: ; preds = %10, %0
%4 = load i32, i32* %1
%5 = icmp slt i32 %4, 21
br i1 %5, label %6, label %13
6: ; preds = %3
%7 = load i32, i32* %1
%8 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 %7)
%9 = call i32 @sleep(i32 1)
br label %10
10: ; preds = %6
%11 = load i32, i32* %1
%12 = add nsw i32 %11, 1
store i32 %12, i32* %1
br label %3
13: ; preds = %3
ret void
}

LLVM IR (-O2):
@.str = [14 x i8] c"sleep %d ...\0A\00"
define void @main() {
%1 = tail call i32 (...) @handler()
%2 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 1)
%3 = tail call i32 @sleep(i32 1)
%4 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 2)
%5 = tail call i32 @sleep(i32 1)
%6 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 3)
%7 = tail call i32 @sleep(i32 1)
%8 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 4)
%9 = tail call i32 @sleep(i32 1)
%10 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 5)
%11 = tail call i32 @sleep(i32 1)
%12 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 6)
%13 = tail call i32 @sleep(i32 1)
%14 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 7)
%15 = tail call i32 @sleep(i32 1)
%16 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 8)
%17 = tail call i32 @sleep(i32 1)
%18 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 9)
%19 = tail call i32 @sleep(i32 1)
%20 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 10)
%21 = tail call i32 @sleep(i32 1)
%22 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 11)
%23 = tail call i32 @sleep(i32 1)
%24 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 12)
%25 = tail call i32 @sleep(i32 1)
%26 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 13)
%27 = tail call i32 @sleep(i32 1)
%28 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 14)
%29 = tail call i32 @sleep(i32 1)
%30 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 15)
%31 = tail call i32 @sleep(i32 1)
%32 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 16)
%33 = tail call i32 @sleep(i32 1)
%34 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 17)
%35 = tail call i32 @sleep(i32 1)
%36 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 18)
%37 = tail call i32 @sleep(i32 1)
%38 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 19)
%39 = tail call i32 @sleep(i32 1)
%40 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 20)
%41 = tail call i32 @sleep(i32 1)
ret void
}