#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*/ getLine(char *, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ sscanf(char *, char *, int *);
int main() {
  char str[5];
  int num1;
  printf("Enter hex string (MAX 4 CHARS) > ");
  getLine(str, 5);
  sscanf(str, "%x", &num1);
  printf("0x%x %d\n", num1, num1);
  printf("%08X %i\n", num1, num1);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x9(%rbp),%rdi
mov    $0x5,%esi
call   1050 <getLine@plt>
lea    -0x9(%rbp),%rdi
lea    0xebc(%rip),%rsi
lea    -0x10(%rbp),%rdx
call   1040 <sscanf@plt>
mov    -0x10(%rbp),%esi
mov    -0x10(%rbp),%edx
lea    0xea9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%esi
mov    -0x10(%rbp),%edx
lea    0xe9e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xec4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xb(%rsp),%rbx
mov    %rbx,%rdi
mov    $0x5,%esi
call   1050 <getLine@plt>
lea    0xec6(%rip),%rsi
lea    0x4(%rsp),%rdx
mov    %rbx,%rdi
call   1040 <sscanf@plt>
mov    0x4(%rsp),%edx
lea    0xeb1(%rip),%rdi
mov    %edx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0x4(%rsp),%edx
lea    0xea6(%rip),%rdi
mov    %edx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [34 x i8] c"Enter hex string (MAX 4 CHARS) > \00"
@.str.1 = [3 x i8] c"%x\00"
@.str.2 = [9 x i8] c"0x%x %d\0A\00"
@.str.3 = [9 x i8] c"%08X %i\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [5 x i8]
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str, i64 0, i64 0))
%5 = getelementptr inbounds [5 x i8], [5 x i8]* %2, i64 0, i64 0
%6 = call i32 @getLine(i8* %5, i32 5)
%7 = getelementptr inbounds [5 x i8], [5 x i8]* %2, i64 0, i64 0
%8 = call i32 @sscanf(i8* %7, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%9 = load i32, i32* %3
%10 = load i32, i32* %3
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i32 %9, i32 %10)
%12 = load i32, i32* %3
%13 = load i32, i32* %3
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0), i32 %12, i32 %13)
ret i32 0
}

LLVM IR (-O2):
@.str = [34 x i8] c"Enter hex string (MAX 4 CHARS) > \00"
@.str.1 = [3 x i8] c"%x\00"
@.str.2 = [9 x i8] c"0x%x %d\0A\00"
@.str.3 = [9 x i8] c"%08X %i\0A\00"
define i32 @main() {
%1 = alloca [5 x i8]
%2 = alloca i32
%3 = getelementptr inbounds [5 x i8], [5 x i8]* %1, i64 0, i64 0
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @getLine(i8* %3, i32 5)
%7 = call i32 @sscanf(i8* %3, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%8 = load i32, i32* %2
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i32 %8, i32 %8)
%10 = load i32, i32* %2
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0), i32 %10, i32 %10)
ret i32 0
}