#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 /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/ *, char *);
int main() {
  FILE *fp1;
  fp1 = fopen("test.txt", "a");
  fprintf(fp1, "Testing...\n");
  FILE *fp2;
  fp2 = fopen("test.txt", "a");
  fprintf(fp2, "Testing...\n");
  fp2 = fp1;
  fclose(fp2);
  fclose(fp1);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xec1(%rip),%rdi
lea    0xec3(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xeb1(%rip),%rsi
call   1040 <fprintf@plt>
lea    0xe9a(%rip),%rdi
lea    0xe9c(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe8a(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x8(%rbp),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
mov    -0x8(%rbp),%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xec1(%rip),%r15
lea    0xec3(%rip),%r14
mov    %r15,%rdi
mov    %r14,%rsi
call   1040 <fopen@plt>
mov    %rax,%rbx
lea    0xeb0(%rip),%r12
mov    $0xb,%esi
mov    $0x1,%edx
mov    %r12,%rdi
mov    %rax,%rcx
call   1050 <fwrite@plt>
mov    %r15,%rdi
mov    %r14,%rsi
call   1040 <fopen@plt>
mov    $0xb,%esi
mov    $0x1,%edx
mov    %r12,%rdi
mov    %rax,%rcx
call   1050 <fwrite@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [9 x i8] c"test.txt\00"
@.str.1 = [2 x i8] c"a\00"
@.str.2 = [12 x i8] c"Testing...\0A\00"
define i32 @main() {
%1 = alloca i32*
%2 = alloca i32*
%3 = call i32* @fopen(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %3, i32** %1
%4 = load i32*, i32** %1
%5 = call i32 @fprintf(i32* %4, i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0))
%6 = call i32* @fopen(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %6, i32** %2
%7 = load i32*, i32** %2
%8 = call i32 @fprintf(i32* %7, i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0))
%9 = load i32*, i32** %1
store i32* %9, i32** %2
%10 = load i32*, i32** %2
%11 = call i32 @fclose(i32* %10)
%12 = load i32*, i32** %1
%13 = call i32 @fclose(i32* %12)
ret i32 0
}

LLVM IR (-O2):
@.str = [9 x i8] c"test.txt\00"
@.str.1 = [2 x i8] c"a\00"
@.str.2 = [12 x i8] c"Testing...\0A\00"
define i32 @main() {
%1 = tail call i32* @fopen(i8* getelementptr inbounds ([9 x i8], [9 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 i64 @fwrite(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i64 11, i64 1, i32* %1)
%3 = tail call i32* @fopen(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%4 = tail call i64 @fwrite(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i64 11, i64 1, i32* %3)
%5 = tail call i32 @fclose(i32* %1)
%6 = tail call i32 @fclose(i32* %1)
ret i32 0
}