#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 */
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
int EOF;
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int fgetc(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fputc(int, int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *);
int main() {
  int c;
  FILE *in, *out;
  in = fopen("file.in", "r");
  out = fopen("file.out", "w");
  while ((c = fgetc(in)) != EOF)
    fputc(c, out);
  printf("\ndone\n");
  exit(0);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe9a(%rip),%rdi
lea    0xe9b(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x10(%rbp)
lea    0xe8d(%rip),%rdi
lea    0xe8f(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
call   1040 <fgetc@plt>
mov    %eax,-0x8(%rbp)
mov    0x2e48(%rip),%rcx
cmp    (%rcx),%eax
je     11b9 <main+0x69>
mov    -0x8(%rbp),%edi
mov    -0x18(%rbp),%rsi
call   1050 <fputc@plt>
jmp    118d <main+0x3d>
lea    0xe55(%rip),%rdi
call   1030 <printf@plt>
xor    %edi,%edi
call   1070 <exit@plt>

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
lea    0xea4(%rip),%rdi
lea    0xea5(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,%r14
lea    0xe98(%rip),%rdi
lea    0xe9a(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,%rbx
mov    %r14,%rdi
call   1040 <fgetc@plt>
mov    0x2e58(%rip),%r15
cmp    (%r15),%eax
je     11b7 <main+0x67>
cs nopw 0x0(%rax,%rax,1)
nop
mov    %eax,%edi
mov    %rbx,%rsi
call   1050 <fputc@plt>
mov    %r14,%rdi
call   1040 <fgetc@plt>
cmp    (%r15),%eax
jne    11a0 <main+0x50>
lea    0xe57(%rip),%rdi
call   1030 <puts@plt>
xor    %edi,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [8 x i8] c"file.in\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [9 x i8] c"file.out\00"
@.str.3 = [2 x i8] c"w\00"
@EOF = global i32 0
@.str.4 = [7 x i8] c"\0Adone\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32*
%4 = alloca i32*
store i32 0, i32* %1
%5 = call i32* @fopen(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %5, i32** %3
%6 = call i32* @fopen(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
store i32* %6, i32** %4
br label %7
7: ; preds = %12, %0
%8 = load i32*, i32** %3
%9 = call i32 @fgetc(i32* %8)
store i32 %9, i32* %2
%10 = load i32, i32* @EOF
%11 = icmp ne i32 %9, %10
br i1 %11, label %12, label %16
12: ; preds = %7
%13 = load i32, i32* %2
%14 = load i32*, i32** %4
%15 = call i32 @fputc(i32 %13, i32* %14)
br label %7
16: ; preds = %7
%17 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0))
%18 = call i32 @exit(i32 0)
unreachable
}

LLVM IR (-O2):
@.str = [8 x i8] c"file.in\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [9 x i8] c"file.out\00"
@.str.3 = [2 x i8] c"w\00"
@EOF = global i32 0
@str = [6 x i8] c"\0Adone\00"
define i32 @main() {
%1 = tail call i32* @fopen(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%2 = tail call i32* @fopen(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%3 = tail call i32 @fgetc(i32* %1)
%4 = load i32, i32* @EOF
%5 = icmp eq i32 %3, %4
br i1 %5, label %12, label %6
6: ; preds = %0, %6
%7 = phi i32 [ %9, %6 ], [ %3, %0 ]
%8 = tail call i32 @fputc(i32 %7, i32* %2)
%9 = tail call i32 @fgetc(i32* %1)
%10 = load i32, i32* @EOF
%11 = icmp eq i32 %9, %10
br i1 %11, label %12, label %6
12: ; preds = %6, %0
%13 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @str, i64 0, i64 0))
%14 = tail call i32 @exit(i32 0)
unreachable
}