#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*/ printf(char *, ...);
int rand();
int /*<<< orphan*/ srand(int /*<<< orphan*/);
int /*<<< orphan*/ time(int /*<<< orphan*/ *);
int main(void) {
  srand(time(NULL));
  for (int i = 0; i < 1048576 * 8; i++) {
    printf("%d", rand() % 2);
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
xor    %eax,%eax
mov    %eax,%edi
call   1050 <time@plt>
mov    %eax,%edi
call   1040 <srand@plt>
movl   $0x0,-0x8(%rbp)
cmpl   $0x800000,-0x8(%rbp)
jge    11a0 <main+0x60>
mov    $0x0,%al
call   1060 <rand@plt>
mov    $0x2,%ecx
cltd
idiv   %ecx
mov    %edx,%esi
lea    0xe75(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1166 <main+0x26>
lea    0xe5c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
xor    %edi,%edi
call   1060 <time@plt>
mov    %eax,%edi
call   1050 <srand@plt>
mov    $0x800000,%ebp
lea    0xe93(%rip),%rbx
nopl   (%rax)
xor    %eax,%eax
call   1070 <rand@plt>
mov    %eax,%ecx
shr    $0x1f,%ecx
add    %eax,%ecx
and    $0xfffffffe,%ecx
sub    %ecx,%eax
mov    %rbx,%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0xffffffff,%ebp
jne    1170 <main+0x20>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @time(i32* null)
%4 = call i32 @srand(i32 %3)
store i32 0, i32* %2
br label %5
5: ; preds = %12, %0
%6 = load i32, i32* %2
%7 = icmp slt i32 %6, 8388608
br i1 %7, label %8, label %15
8: ; preds = %5
%9 = call i32 (...) @rand()
%10 = srem i32 %9, 2
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32 %10)
br label %12
12: ; preds = %8
%13 = load i32, i32* %2
%14 = add nsw i32 %13, 1
store i32 %14, i32* %2
br label %5
15: ; preds = %5
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%17 = load i32, i32* %1
ret i32 %17
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
define i32 @main() {
%1 = tail call i32 @time(i32* null)
%2 = tail call i32 @srand(i32 %1)
br label %5
3: ; preds = %5
%4 = tail call i32 @putchar(i32 10)
ret i32 0
5: ; preds = %0, %5
%6 = phi i32 [ 0, %0 ], [ %10, %5 ]
%7 = tail call i32 (...) @rand()
%8 = srem i32 %7, 2
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32 %8)
%10 = add nuw nsw i32 %6, 1
%11 = icmp eq i32 %10, 8388608
br i1 %11, label %3, label %5
}