#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*/ exit(int);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ puts(char *);
int /*<<< orphan*/ readLine(int /*<<< orphan*/ *);
int main(void) {
  FILE *fp = NULL;
  fp = fopen("readLine.txt", "r");
  if (NULL == fp) {
    puts("fopen error");
    exit(1);
  }
  readLine(fp);
  fclose(fp);
  exit(0);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movq   $0x0,-0x10(%rbp)
lea    0xe92(%rip),%rdi
lea    0xea2(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x10(%rbp)
xor    %eax,%eax
cmp    -0x10(%rbp),%rax
jne    11a0 <main+0x50>
lea    0xe7c(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rdi
call   1050 <readLine@plt>
mov    -0x10(%rbp),%rdi
call   1040 <fclose@plt>
xor    %edi,%edi
call   1070 <exit@plt>

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xea8(%rip),%rdi
lea    0xeb8(%rip),%rsi
call   1060 <fopen@plt>
test   %rax,%rax
jne    117f <main+0x2f>
lea    0xe9d(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    %rax,%rbx
mov    %rax,%rdi
call   1050 <readLine@plt>
mov    %rbx,%rdi
call   1040 <fclose@plt>
xor    %edi,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [13 x i8] c"readLine.txt\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [12 x i8] c"fopen error\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32*
store i32 0, i32* %1
store i32* null, i32** %2
%3 = call i32* @fopen(i8* getelementptr inbounds ([13 x i8], [13 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** %2
%4 = load i32*, i32** %2
%5 = icmp eq i32* null, %4
br i1 %5, label %6, label %9
6: ; preds = %0
%7 = call i32 @puts(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 @exit(i32 1)
unreachable
9: ; preds = %0
%10 = load i32*, i32** %2
%11 = call i32 @readLine(i32* %10)
%12 = load i32*, i32** %2
%13 = call i32 @fclose(i32* %12)
%14 = call i32 @exit(i32 0)
unreachable
}

LLVM IR (-O2):
@.str = [13 x i8] c"readLine.txt\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [12 x i8] c"fopen error\00"
define i32 @main() {
%1 = tail call i32* @fopen(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%2 = icmp eq i32* %1, null
br i1 %2, label %3, label %6
3: ; preds = %0
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0))
%5 = tail call i32 @exit(i32 1)
unreachable
6: ; preds = %0
%7 = tail call i32 @readLine(i32* %1)
%8 = tail call i32 @fclose(i32* %1)
%9 = tail call i32 @exit(i32 0)
unreachable
}