#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 EXIT_FAILURE;
int EXIT_SUCCESS;
int /*<<< orphan*/ concatenate_first_chars();
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char **argv) {
  if (argc != 1) {
    printf("usage:\n%s\n", argv[0]);
    return EXIT_FAILURE;
  }
  concatenate_first_chars();
  printf("Not authenticated\n");
  return EXIT_SUCCESS;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x1,-0x8(%rbp)
je     1166 <main+0x46>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xeb2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    0x2e84(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    1187 <main+0x67>
mov    $0x0,%al
call   1040 <concatenate_first_chars@plt>
lea    0xe97(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    0x2e56(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x1,%edi
jne    1152 <main+0x22>
xor    %eax,%eax
call   1050 <concatenate_first_chars@plt>
lea    0xec7(%rip),%rdi
call   1030 <puts@plt>
mov    0x2e88(%rip),%rax
jmp    116a <main+0x3a>
mov    (%rsi),%rsi
lea    0xea4(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x2e76(%rip),%rax
mov    (%rax),%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [11 x i8] c"usage:\0A%s\0A\00"
@EXIT_FAILURE = global i32 0
@.str.1 = [19 x i8] c"Not authenticated\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = load i32, i32* %4
%7 = icmp ne i32 %6, 1
br i1 %7, label %8, label %14
8: ; preds = %2
%9 = load i8**, i8*** %5
%10 = getelementptr inbounds i8*, i8** %9, i64 0
%11 = load i8*, i8** %10
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8* %11)
%13 = load i32, i32* @EXIT_FAILURE
store i32 %13, i32* %3
br label %18
14: ; preds = %2
%15 = call i32 (...) @concatenate_first_chars()
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0))
%17 = load i32, i32* @EXIT_SUCCESS
store i32 %17, i32* %3
br label %18
18: ; preds = %14, %8
%19 = load i32, i32* %3
ret i32 %19
}

LLVM IR (-O2):
@.str = [11 x i8] c"usage:\0A%s\0A\00"
@EXIT_FAILURE = global i32 0
@EXIT_SUCCESS = global i32 0
@str = [18 x i8] c"Not authenticated\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 1
br i1 %3, label %7, label %4
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8* %5)
br label %10
7: ; preds = %2
%8 = tail call i32 (...) @concatenate_first_chars()
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @str, i64 0, i64 0))
br label %10
10: ; preds = %7, %4
%11 = phi i32* [ @EXIT_FAILURE, %4 ], [ @EXIT_SUCCESS, %7 ]
%12 = load i32, i32* %11
ret i32 %12
}