#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 atoi(char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, ...);
unsigned int inttobcd(int);
int /*<<< orphan*/ printf(char *, int, unsigned int);
int /*<<< orphan*/ stderr;
int main(int argc, char *argv[]) {
  if (argc != 2) {
    fprintf(stderr, "Usage: %s [integer].\n", argv[0]);
    return -1;
  }
  int number = atoi(argv[1]);
  if (number < 0) {
    fprintf(stderr, "Error, BCD code must be positive number.\n");
    return -1;
  }
  unsigned int result = inttobcd(number);
  printf("%d's BCD code's binary is 0x%x\n", number, result);
  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)
je     118a <main+0x4a>
mov    0x2e79(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe89(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11eb <main+0xab>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,-0x14(%rbp)
cmpl   $0x0,-0x14(%rbp)
jge    11c7 <main+0x87>
mov    0x2e35(%rip),%rax
mov    (%rax),%edi
lea    0xe62(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11eb <main+0xab>
mov    -0x14(%rbp),%edi
call   1050 <inttobcd@plt>
mov    %eax,-0x18(%rbp)
mov    -0x14(%rbp),%esi
mov    -0x18(%rbp),%edx
lea    0xe61(%rip),%rdi
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    1170 <main+0x30>
mov    0x8(%rsi),%rdi
call   1060 <atoi@plt>
test   %eax,%eax
js     118c <main+0x4c>
mov    %eax,%ebx
mov    %eax,%edi
call   1050 <inttobcd@plt>
lea    0xedd(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret
mov    0x2e69(%rip),%rax
mov    (%rax),%edi
mov    (%rsi),%rdx
lea    0xe7d(%rip),%rsi
xor    %eax,%eax
call   1040 <fprintf@plt>
jmp    11a3 <main+0x63>
mov    0x2e4d(%rip),%rax
mov    (%rax),%edi
lea    0xe7a(%rip),%rsi
xor    %eax,%eax
call   1040 <fprintf@plt>
mov    $0xffffffff,%eax
pop    %rbx
ret

LLVM IR (-O0):
@stderr = global i32 0
@.str = [22 x i8] c"Usage: %s [integer].\0A\00"
@.str.1 = [42 x i8] c"Error, BCD code must be positive number.\0A\00"
@.str.2 = [32 x i8] c"%d's BCD code's binary is 0x%x\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp ne i32 %8, 2
br i1 %9, label %10, label %16
10: ; preds = %2
%11 = load i32, i32* @stderr
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 0
%14 = load i8*, i8** %13
%15 = call i32 (i32, i8*, ...) @fprintf(i32 %11, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8* %14)
store i32 -1, i32* %3
br label %32
16: ; preds = %2
%17 = load i8**, i8*** %5
%18 = getelementptr inbounds i8*, i8** %17, i64 1
%19 = load i8*, i8** %18
%20 = call i32 @atoi(i8* %19)
store i32 %20, i32* %6
%21 = load i32, i32* %6
%22 = icmp slt i32 %21, 0
br i1 %22, label %23, label %26
23: ; preds = %16
%24 = load i32, i32* @stderr
%25 = call i32 (i32, i8*, ...) @fprintf(i32 %24, i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str.1, i64 0, i64 0))
store i32 -1, i32* %3
br label %32
26: ; preds = %16
%27 = load i32, i32* %6
%28 = call i32 @inttobcd(i32 %27)
store i32 %28, i32* %7
%29 = load i32, i32* %6
%30 = load i32, i32* %7
%31 = call i32 @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.2, i64 0, i64 0), i32 %29, i32 %30)
store i32 0, i32* %3
br label %32
32: ; preds = %26, %23, %10
%33 = load i32, i32* %3
ret i32 %33
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [22 x i8] c"Usage: %s [integer].\0A\00"
@.str.1 = [42 x i8] c"Error, BCD code must be positive number.\0A\00"
@.str.2 = [32 x i8] c"%d's BCD code's binary is 0x%x\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %8, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 (i32, i8*, ...) @fprintf(i32 %5, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8* %6)
br label %19
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = tail call i32 @atoi(i8* %10)
%12 = icmp slt i32 %11, 0
br i1 %12, label %13, label %16
13: ; preds = %8
%14 = load i32, i32* @stderr
%15 = tail call i32 (i32, i8*, ...) @fprintf(i32 %14, i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str.1, i64 0, i64 0))
br label %19
16: ; preds = %8
%17 = tail call i32 @inttobcd(i32 %11)
%18 = tail call i32 @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.2, i64 0, i64 0), i32 %11, i32 %17)
br label %19
19: ; preds = %13, %16, %4
%20 = phi i32 [ -1, %4 ], [ -1, %13 ], [ 0, %16 ]
ret i32 %20
}