#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 invert(int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *);
int main(int argc, char **argv) {
  char *a;
  a = argv[1];
  FILE *fp;
  if (!(fp = fopen(a, "r"))) {
    printf("Input file does not exist\n");
    exit(1);
  }
  int res = invert(fp);
  fclose(fp);
  return res;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rax
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rdi
lea    0xe83(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmp    $0x0,%rax
jne    11a6 <main+0x56>
lea    0xe6b(%rip),%rdi
call   1050 <printf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    -0x20(%rbp),%rdi
call   1030 <invert@plt>
mov    %eax,-0x24(%rbp)
mov    -0x20(%rbp),%rdi
call   1040 <fclose@plt>
mov    -0x24(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
mov    0x8(%rsi),%rdi
lea    0xea2(%rip),%rsi
call   1060 <fopen@plt>
test   %rax,%rax
je     1186 <main+0x36>
mov    %rax,%rbx
mov    %rax,%rdi
call   1030 <invert@plt>
mov    %eax,%ebp
mov    %rbx,%rdi
call   1050 <fclose@plt>
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret
lea    0xe75(%rip),%rdi
call   1040 <puts@plt>
mov    $0x1,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@.str.1 = [27 x i8] c"Input file does not exist\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i8*
%7 = alloca i32*
%8 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%9 = load i8**, i8*** %5
%10 = getelementptr inbounds i8*, i8** %9, i64 1
%11 = load i8*, i8** %10
store i8* %11, i8** %6
%12 = load i8*, i8** %6
%13 = call i32* @fopen(i8* %12, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %13, i32** %7
%14 = icmp ne i32* %13, null
br i1 %14, label %18, label %15
15: ; preds = %2
%16 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0))
%17 = call i32 @exit(i32 1)
unreachable
18: ; preds = %2
%19 = load i32*, i32** %7
%20 = call i32 @invert(i32* %19)
store i32 %20, i32* %8
%21 = load i32*, i32** %7
%22 = call i32 @fclose(i32* %21)
%23 = load i32, i32* %8
ret i32 %23
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@str = [26 x i8] c"Input file does not exist\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = getelementptr inbounds i8*, i8** %1, i64 1
%4 = load i8*, i8** %3
%5 = tail call i32* @fopen(i8* %4, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%6 = icmp eq i32* %5, null
br i1 %6, label %7, label %10
7: ; preds = %2
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str, i64 0, i64 0))
%9 = tail call i32 @exit(i32 1)
unreachable
10: ; preds = %2
%11 = tail call i32 @invert(i32* %5)
%12 = tail call i32 @fclose(i32* %5)
ret i32 %11
}