#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 */
unsigned int mask(int, int);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ scanf(char *, ...);
int /*<<< orphan*/ showbits(unsigned int);
int main() {
  unsigned int i_num;
  unsigned int r_num;
  int pos;
  int bits;
  printf("Enter two numbers:");
  scanf("%d%d", &i_num, &r_num);
  showbits(i_num);
  showbits(r_num);
  printf("Enter the starting position:");
  scanf("%d", &pos);
  printf("Enter the number of bits:");
  scanf("%d", &bits);
  r_num = (mask(pos, bits) | i_num);
  printf("Number after setting bits:\n");
  showbits(r_num);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeaa(%rip),%rdi
call   1040 <printf@plt>
lea    0xeb1(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
mov    $0x0,%al
call   1050 <scanf@plt>
mov    -0x8(%rbp),%edi
call   1030 <showbits@plt>
mov    -0xc(%rbp),%edi
call   1030 <showbits@plt>
lea    0xe90(%rip),%rdi
call   1040 <printf@plt>
lea    0xe81(%rip),%rdi
lea    -0x10(%rbp),%rsi
mov    $0x0,%al
call   1050 <scanf@plt>
lea    0xe8f(%rip),%rdi
call   1040 <printf@plt>
lea    0xe63(%rip),%rdi
lea    -0x14(%rbp),%rsi
mov    $0x0,%al
call   1050 <scanf@plt>
mov    -0x10(%rbp),%edi
mov    -0x14(%rbp),%esi
call   1060 <mask@plt>
or     -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
lea    0xe7a(%rip),%rdi
call   1040 <printf@plt>
mov    -0xc(%rbp),%edi
call   1030 <showbits@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xea4(%rip),%rdi
call   1050 <printf@plt>
lea    0xeab(%rip),%rdi
lea    0x4(%rsp),%rsi
mov    %rsp,%rdx
xor    %eax,%eax
call   1060 <scanf@plt>
mov    0x4(%rsp),%edi
call   1040 <showbits@plt>
mov    (%rsp),%edi
call   1040 <showbits@plt>
lea    0xe89(%rip),%rdi
call   1050 <printf@plt>
lea    0xe7a(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <scanf@plt>
lea    0xe84(%rip),%rdi
call   1050 <printf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
xor    %eax,%eax
call   1060 <scanf@plt>
mov    0xc(%rsp),%edi
mov    0x8(%rsp),%esi
call   1070 <mask@plt>
or     0x4(%rsp),%eax
mov    %eax,(%rsp)
lea    0xe6f(%rip),%rdi
call   1030 <puts@plt>
mov    (%rsp),%edi
call   1040 <showbits@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [19 x i8] c"Enter two numbers:\00"
@.str.1 = [5 x i8] c"%d%d\00"
@.str.2 = [29 x i8] c"Enter the starting position:\00"
@.str.3 = [3 x i8] c"%d\00"
@.str.4 = [26 x i8] c"Enter the number of bits:\00"
@.str.5 = [28 x i8] c"Number after setting bits:\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
%6 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%7 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3)
%8 = load i32, i32* %2
%9 = call i32 @showbits(i32 %8)
%10 = load i32, i32* %3
%11 = call i32 @showbits(i32 %10)
%12 = call i32 @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0))
%13 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %4)
%14 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.4, i64 0, i64 0))
%15 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %5)
%16 = load i32, i32* %4
%17 = load i32, i32* %5
%18 = call i32 @mask(i32 %16, i32 %17)
%19 = load i32, i32* %2
%20 = or i32 %18, %19
store i32 %20, i32* %3
%21 = call i32 @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.5, i64 0, i64 0))
%22 = load i32, i32* %3
%23 = call i32 @showbits(i32 %22)
ret i32 0
}

LLVM IR (-O2):
@.str = [19 x i8] c"Enter two numbers:\00"
@.str.1 = [5 x i8] c"%d%d\00"
@.str.2 = [29 x i8] c"Enter the starting position:\00"
@.str.3 = [3 x i8] c"%d\00"
@.str.4 = [26 x i8] c"Enter the number of bits:\00"
@str = [27 x i8] c"Number after setting bits:\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = bitcast i32* %1 to i8*
%6 = bitcast i32* %2 to i8*
%7 = bitcast i32* %3 to i8*
%8 = bitcast i32* %4 to i8*
%9 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%10 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2)
%11 = load i32, i32* %1
%12 = call i32 @showbits(i32 %11)
%13 = load i32, i32* %2
%14 = call i32 @showbits(i32 %13)
%15 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0))
%16 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %3)
%17 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.4, i64 0, i64 0))
%18 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %4)
%19 = load i32, i32* %3
%20 = load i32, i32* %4
%21 = call i32 @mask(i32 %19, i32 %20)
%22 = load i32, i32* %1
%23 = or i32 %22, %21
store i32 %23, i32* %2
%24 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @str, i64 0, i64 0))
%25 = load i32, i32* %2
%26 = call i32 @showbits(i32 %25)
ret i32 0
}