#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 *fp;
  char filename[] = "my_file.txt";
  fp = fopen(filename, "w");
  fprintf(fp, "This is a file created by my program! I am so happy.\n");
  fclose(fp);
  fp = fopen(filename, "a");
  fprintf(fp, "Second line.\n");
  fclose(fp);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    0xeba(%rip),%rax
mov    %rax,-0x1c(%rbp)
mov    0xeb8(%rip),%eax
mov    %eax,-0x14(%rbp)
lea    -0x1c(%rbp),%rdi
lea    0xeae(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe9c(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
lea    -0x1c(%rbp),%rdi
lea    0xeb9(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xea7(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x18,%rsp
movabs $0x2e656c69665f796d,%rax
6c 65 2e
mov    %rax,0x8(%rsp)
movl   $0x747874,0x10(%rsp)
lea    0xeb7(%rip),%rsi
lea    0x8(%rsp),%r14
mov    %r14,%rdi
call   1040 <fopen@plt>
mov    %rax,%rbx
lea    0xea2(%rip),%rdi
mov    $0x35,%esi
mov    $0x1,%edx
mov    %rax,%rcx
call   1050 <fwrite@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
lea    0xeb7(%rip),%rsi
mov    %r14,%rdi
call   1040 <fopen@plt>
mov    %rax,%rbx
lea    0xea7(%rip),%rdi
mov    $0xd,%esi
mov    $0x1,%edx
mov    %rax,%rcx
call   1050 <fwrite@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@__const.main.filename = [12 x i8] c"my_file.txt\00"
@.str = [2 x i8] c"w\00"
@.str.1 = [54 x i8] c"This is a file created by my program! I am so happy.\0A\00"
@.str.2 = [2 x i8] c"a\00"
@.str.3 = [14 x i8] c"Second line.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32*
%3 = alloca [12 x i8]
store i32 0, i32* %1
%4 = bitcast [12 x i8]* %3 to i8*
%5 = getelementptr inbounds [12 x i8], [12 x i8]* %3, i64 0, i64 0
%6 = call i32* @fopen(i8* %5, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %6, i32** %2
%7 = load i32*, i32** %2
%8 = call i32 @fprintf(i32* %7, i8* getelementptr inbounds ([54 x i8], [54 x i8]* @.str.1, i64 0, i64 0))
%9 = load i32*, i32** %2
%10 = call i32 @fclose(i32* %9)
%11 = getelementptr inbounds [12 x i8], [12 x i8]* %3, i64 0, i64 0
%12 = call i32* @fopen(i8* %11, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
store i32* %12, i32** %2
%13 = load i32*, i32** %2
%14 = call i32 @fprintf(i32* %13, i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.3, i64 0, i64 0))
%15 = load i32*, i32** %2
%16 = call i32 @fclose(i32* %15)
ret i32 0
}

LLVM IR (-O2):
@__const.main.filename = [12 x i8] c"my_file.txt\00"
@.str = [2 x i8] c"w\00"
@.str.1 = [54 x i8] c"This is a file created by my program! I am so happy.\0A\00"
@.str.2 = [2 x i8] c"a\00"
@.str.3 = [14 x i8] c"Second line.\0A\00"
define i32 @main() {
%1 = alloca [12 x i8]
%2 = getelementptr inbounds [12 x i8], [12 x i8]* %1, i64 0, i64 0
%3 = call i32* @fopen(i8* %2, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%4 = tail call i64 @fwrite(i8* getelementptr inbounds ([54 x i8], [54 x i8]* @.str.1, i64 0, i64 0), i64 53, i64 1, i32* %3)
%5 = tail call i32 @fclose(i32* %3)
%6 = call i32* @fopen(i8* %2, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%7 = tail call i64 @fwrite(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.3, i64 0, i64 0), i64 13, i64 1, i32* %6)
%8 = tail call i32 @fclose(i32* %6)
ret i32 0
}