#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*/ check_keyboard();
int /*<<< orphan*/ f_delay(int);
int /*<<< orphan*/ printport(unsigned char);
unsigned char random_inport();
int /*<<< orphan*/ srand(int /*<<< orphan*/);
int /*<<< orphan*/ time(int /*<<< orphan*/);
int main() {
  int nr;
  unsigned char port;
  srand(time(0));
  for (nr = 0; nr < 10; nr++) {
    port = random_inport();
    printport(port);
    check_keyboard();
    f_delay(5);
  }
  return (0);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
xor    %edi,%edi
call   1050 <time@plt>
mov    %eax,%edi
call   1040 <srand@plt>
movl   $0x0,-0x8(%rbp)
cmpl   $0xa,-0x8(%rbp)
jge    11c0 <main+0x60>
mov    $0x0,%al
call   1070 <random_inport@plt>
mov    %al,-0x9(%rbp)
movzbl -0x9(%rbp),%edi
call   1060 <printport@plt>
mov    $0x0,%al
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1184 <main+0x24>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
xor    %edi,%edi
call   1050 <time@plt>
mov    %eax,%edi
call   1040 <srand@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
call   1070 <random_inport@plt>
movzbl %al,%edi
call   1060 <printport@plt>
xor    %eax,%eax
call   1030 <check_keyboard@plt>
mov    $0x5,%edi
call   1080 <f_delay@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i8
store i32 0, i32* %1
%4 = call i32 @time(i32 0)
%5 = call i32 @srand(i32 %4)
store i32 0, i32* %2
br label %6
6: ; preds = %15, %0
%7 = load i32, i32* %2
%8 = icmp slt i32 %7, 10
br i1 %8, label %9, label %18
9: ; preds = %6
%10 = call zeroext i8 (...) @random_inport()
store i8 %10, i8* %3
%11 = load i8, i8* %3
%12 = call i32 @printport(i8 zeroext %11)
%13 = call i32 (...) @check_keyboard()
%14 = call i32 @f_delay(i32 5)
br label %15
15: ; preds = %9
%16 = load i32, i32* %2
%17 = add nsw i32 %16, 1
store i32 %17, i32* %2
br label %6
18: ; preds = %6
ret i32 0
}

LLVM IR (-O2):
define i32 @main() {
%1 = tail call i32 @time(i32 0)
%2 = tail call i32 @srand(i32 %1)
%3 = tail call zeroext i8 (...) @random_inport()
%4 = tail call i32 @printport(i8 zeroext %3)
%5 = tail call i32 (...) @check_keyboard()
%6 = tail call i32 @f_delay(i32 5)
%7 = tail call zeroext i8 (...) @random_inport()
%8 = tail call i32 @printport(i8 zeroext %7)
%9 = tail call i32 (...) @check_keyboard()
%10 = tail call i32 @f_delay(i32 5)
%11 = tail call zeroext i8 (...) @random_inport()
%12 = tail call i32 @printport(i8 zeroext %11)
%13 = tail call i32 (...) @check_keyboard()
%14 = tail call i32 @f_delay(i32 5)
%15 = tail call zeroext i8 (...) @random_inport()
%16 = tail call i32 @printport(i8 zeroext %15)
%17 = tail call i32 (...) @check_keyboard()
%18 = tail call i32 @f_delay(i32 5)
%19 = tail call zeroext i8 (...) @random_inport()
%20 = tail call i32 @printport(i8 zeroext %19)
%21 = tail call i32 (...) @check_keyboard()
%22 = tail call i32 @f_delay(i32 5)
%23 = tail call zeroext i8 (...) @random_inport()
%24 = tail call i32 @printport(i8 zeroext %23)
%25 = tail call i32 (...) @check_keyboard()
%26 = tail call i32 @f_delay(i32 5)
%27 = tail call zeroext i8 (...) @random_inport()
%28 = tail call i32 @printport(i8 zeroext %27)
%29 = tail call i32 (...) @check_keyboard()
%30 = tail call i32 @f_delay(i32 5)
%31 = tail call zeroext i8 (...) @random_inport()
%32 = tail call i32 @printport(i8 zeroext %31)
%33 = tail call i32 (...) @check_keyboard()
%34 = tail call i32 @f_delay(i32 5)
%35 = tail call zeroext i8 (...) @random_inport()
%36 = tail call i32 @printport(i8 zeroext %35)
%37 = tail call i32 (...) @check_keyboard()
%38 = tail call i32 @f_delay(i32 5)
%39 = tail call zeroext i8 (...) @random_inport()
%40 = tail call i32 @printport(i8 zeroext %39)
%41 = tail call i32 (...) @check_keyboard()
%42 = tail call i32 @f_delay(i32 5)
ret i32 0
}