#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 /*<<< orphan*/ fscanf(int /*<<< orphan*/ *, char *, char *);
int /*<<< orphan*/ printf(char *, char *);
int /*<<< orphan*/ *stdout;
int main() {
  FILE *fp;
  fp = fopen("test1.txt", "w");
  fprintf(fp, "helloworld111\n");
  fprintf(stdout, "helloworld222\n");
  fclose(fp);
  char str[100];
  FILE *fp2;
  fp2 = fopen("test1.txt", "r");
  fscanf(fp2, "%s", str);
  printf("result:%s\n", str);
  fclose(fp2);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x90,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe97(%rip),%rdi
lea    0xe9a(%rip),%rsi
call   1070 <fopen@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe88(%rip),%rsi
call   1060 <fprintf@plt>
mov    0x2e50(%rip),%rax
mov    (%rax),%rdi
lea    0xe81(%rip),%rsi
call   1060 <fprintf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
lea    0xe51(%rip),%rdi
lea    0xe74(%rip),%rsi
call   1070 <fopen@plt>
mov    %rax,-0x88(%rbp)
mov    -0x88(%rbp),%rdi
lea    -0x80(%rbp),%rdx
lea    0xe58(%rip),%rsi
call   1050 <fscanf@plt>
lea    -0x80(%rbp),%rsi
lea    0xe4b(%rip),%rdi
call   1040 <printf@plt>
mov    -0x88(%rbp),%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x90,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x68,%rsp
lea    0xea2(%rip),%r14
lea    0xea5(%rip),%rsi
mov    %r14,%rdi
call   1060 <fopen@plt>
mov    %rax,%rbx
lea    0xe95(%rip),%rdi
mov    $0xe,%esi
mov    $0x1,%edx
mov    %rax,%rcx
call   1070 <fwrite@plt>
mov    0x2e50(%rip),%rax
mov    (%rax),%rcx
lea    0xe81(%rip),%rdi
mov    $0xe,%esi
mov    $0x1,%edx
call   1070 <fwrite@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
lea    0xe72(%rip),%rsi
mov    %r14,%rdi
call   1060 <fopen@plt>
mov    %rax,%rbx
lea    0xe62(%rip),%rsi
mov    %rsp,%r14
mov    %rax,%rdi
mov    %r14,%rdx
call   1050 <fscanf@plt>
lea    0xe50(%rip),%rdi
mov    %r14,%rsi
call   1040 <printf@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x68,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [10 x i8] c"test1.txt\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [15 x i8] c"helloworld111\0A\00"
@stdout = global i32* null
@.str.3 = [15 x i8] c"helloworld222\0A\00"
@.str.4 = [2 x i8] c"r\00"
@.str.5 = [3 x i8] c"%s\00"
@.str.6 = [11 x i8] c"result:%s\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32*
%3 = alloca [100 x i8]
%4 = alloca i32*
store i32 0, i32* %1
%5 = call i32* @fopen(i8* getelementptr inbounds ([10 x i8], [10 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** %2
%6 = load i32*, i32** %2
%7 = call i32 @fprintf(i32* %6, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0))
%8 = load i32*, i32** @stdout
%9 = call i32 @fprintf(i32* %8, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0))
%10 = load i32*, i32** %2
%11 = call i32 @fclose(i32* %10)
%12 = call i32* @fopen(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0))
store i32* %12, i32** %4
%13 = load i32*, i32** %4
%14 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%15 = call i32 @fscanf(i32* %13, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.5, i64 0, i64 0), i8* %14)
%16 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%17 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.6, i64 0, i64 0), i8* %16)
%18 = load i32*, i32** %4
%19 = call i32 @fclose(i32* %18)
ret i32 0
}

LLVM IR (-O2):
@.str = [10 x i8] c"test1.txt\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [15 x i8] c"helloworld111\0A\00"
@stdout = global i32* null
@.str.3 = [15 x i8] c"helloworld222\0A\00"
@.str.4 = [2 x i8] c"r\00"
@.str.5 = [3 x i8] c"%s\00"
@.str.6 = [11 x i8] c"result:%s\0A\00"
define i32 @main() {
%1 = alloca [100 x i8]
%2 = tail call i32* @fopen(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%3 = tail call i64 @fwrite(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), i64 14, i64 1, i32* %2)
%4 = load i32*, i32** @stdout
%5 = tail call i64 @fwrite(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), i64 14, i64 1, i32* %4)
%6 = tail call i32 @fclose(i32* %2)
%7 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%8 = tail call i32* @fopen(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0))
%9 = call i32 @fscanf(i32* %8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.5, i64 0, i64 0), i8* %7)
%10 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.6, i64 0, i64 0), i8* %7)
%11 = call i32 @fclose(i32* %8)
ret i32 0
}