#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 */

/* Variables and functions */
int /*<<< orphan*/ O_RDONLY;
int /*<<< orphan*/ STDOUT_FILENO;
int open(char *, int /*<<< orphan*/);
int /*<<< orphan*/ perror(char *);
int receive_mode(int /*<<< orphan*/);
int send_mode(int);
int main(int argc, char *argv[]) {
  if (argc == 1)
    return receive_mode(STDOUT_FILENO);
  int fd_inp = open(argv[1], O_RDONLY);
  if (fd_inp == -1) {
    perror("File doesn't exist\n");
    return 1;
  }
  return send_mode(fd_inp);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x1,-0x8(%rbp)
jne    1176 <main+0x36>
mov    0x2e89(%rip),%rax
mov    (%rax),%edi
call   1030 <receive_mode@plt>
mov    %eax,-0x4(%rbp)
jmp    11bc <main+0x7c>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    0x2e5b(%rip),%rax
mov    (%rax),%esi
call   1050 <open@plt>
mov    %eax,-0x14(%rbp)
cmpl   $0xffffffff,-0x14(%rbp)
jne    11b1 <main+0x71>
lea    0xe60(%rip),%rdi
call   1060 <perror@plt>
movl   $0x1,-0x4(%rbp)
jmp    11bc <main+0x7c>
mov    -0x14(%rbp),%edi
call   1040 <send_mode@plt>
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x1,%edi
jne    1155 <main+0x15>
mov    0x2ea3(%rip),%rax
mov    (%rax),%edi
pop    %rax
jmp    1030 <receive_mode@plt>
mov    0x8(%rsi),%rdi
mov    0x2e80(%rip),%rax
mov    (%rax),%esi
call   1050 <open@plt>
cmp    $0xffffffff,%eax
je     1174 <main+0x34>
mov    %eax,%edi
pop    %rax
jmp    1040 <send_mode@plt>
lea    0xe85(%rip),%rdi
call   1060 <perror@plt>
mov    $0x1,%eax
pop    %rcx
ret

LLVM IR (-O0):
@STDOUT_FILENO = global i32 0
@O_RDONLY = global i32 0
@.str = [20 x i8] c"File doesn't exist\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp eq i32 %7, 1
br i1 %8, label %9, label %12
9: ; preds = %2
%10 = load i32, i32* @STDOUT_FILENO
%11 = call i32 @receive_mode(i32 %10)
store i32 %11, i32* %3
br label %25
12: ; preds = %2
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 1
%15 = load i8*, i8** %14
%16 = load i32, i32* @O_RDONLY
%17 = call i32 @open(i8* %15, i32 %16)
store i32 %17, i32* %6
%18 = load i32, i32* %6
%19 = icmp eq i32 %18, -1
br i1 %19, label %20, label %22
20: ; preds = %12
%21 = call i32 @perror(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
store i32 1, i32* %3
br label %25
22: ; preds = %12
%23 = load i32, i32* %6
%24 = call i32 @send_mode(i32 %23)
store i32 %24, i32* %3
br label %25
25: ; preds = %22, %20, %9
%26 = load i32, i32* %3
ret i32 %26
}

LLVM IR (-O2):
@STDOUT_FILENO = global i32 0
@O_RDONLY = global i32 0
@.str = [20 x i8] c"File doesn't exist\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 1
br i1 %3, label %4, label %7
4: ; preds = %2
%5 = load i32, i32* @STDOUT_FILENO
%6 = tail call i32 @receive_mode(i32 %5)
br label %17
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = load i32, i32* @O_RDONLY
%11 = tail call i32 @open(i8* %9, i32 %10)
%12 = icmp eq i32 %11, -1
br i1 %12, label %13, label %15
13: ; preds = %7
%14 = tail call i32 @perror(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
br label %17
15: ; preds = %7
%16 = tail call i32 @send_mode(i32 %11)
br label %17
17: ; preds = %13, %15, %4
%18 = phi i32 [ %6, %4 ], [ 1, %13 ], [ %16, %15 ]
ret i32 %18
}