#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 uint16_t;

/* Variables and functions */
int /*<<< orphan*/ printf(char *, ...);
int test(char *);
int main(int argc, char **argv) {
  if (argc < 2) {
    printf("%s <filename>\n", argv[0]);
    return -1;
  }
  uint16_t result = test(argv[1]);
  if (result == 0x1337) {
    printf("OK\n");
  } else {
    printf("BAD\n");
  }
  return 0;
}


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   $0x2,-0x8(%rbp)
jge    1161 <main+0x41>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xeb2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11a6 <main+0x86>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1040 <test@plt>
mov    %eax,-0x14(%rbp)
cmpl   $0x1337,-0x14(%rbp)
jne    1191 <main+0x71>
lea    0xe8a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    119f <main+0x7f>
lea    0xe7b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x1,%edi
jg     114e <main+0x1e>
mov    (%rsi),%rsi
lea    0xec0(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xffffffff,%eax
pop    %rcx
ret
mov    0x8(%rsi),%rdi
call   1050 <test@plt>
cmp    $0x1337,%eax
jne    1167 <main+0x37>
lea    0xeae(%rip),%rdi
jmp    116e <main+0x3e>
lea    0xea1(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [15 x i8] c"%s <filename>\0A\00"
@.str.1 = [4 x i8] c"OK\0A\00"
@.str.2 = [5 x i8] c"BAD\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 slt i32 %7, 2
br i1 %8, label %9, label %14
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0), i8* %12)
store i32 -1, i32* %3
br label %26
14: ; preds = %2
%15 = load i8**, i8*** %5
%16 = getelementptr inbounds i8*, i8** %15, i64 1
%17 = load i8*, i8** %16
%18 = call i32 @test(i8* %17)
store i32 %18, i32* %6
%19 = load i32, i32* %6
%20 = icmp eq i32 %19, 4919
br i1 %20, label %21, label %23
21: ; preds = %14
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
br label %25
23: ; preds = %14
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
br label %25
25: ; preds = %23, %21
store i32 0, i32* %3
br label %26
26: ; preds = %25, %9
%27 = load i32, i32* %3
ret i32 %27
}

LLVM IR (-O2):
@.str = [15 x i8] c"%s <filename>\0A\00"
@str = [4 x i8] c"BAD\00"
@str.3 = [3 x i8] c"OK\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %7
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0), i8* %5)
br label %16
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = tail call i32 @test(i8* %9)
%11 = icmp eq i32 %10, 4919
br i1 %11, label %12, label %14
12: ; preds = %7
%13 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @str.3, i64 0, i64 0))
br label %16
14: ; preds = %7
%15 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @str, i64 0, i64 0))
br label %16
16: ; preds = %12, %14, %4
%17 = phi i32 [ -1, %4 ], [ 0, %14 ], [ 0, %12 ]
ret i32 %17
}