#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*/ displayBits(unsigned int);
unsigned int power2(unsigned int, unsigned int);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ scanf(char *, unsigned int *);
int main(void) {
  unsigned number;
  unsigned pow;
  printf("This program calculates (number * 2^pow) using the left shift "
         "operator\nand prints the result and its equivalent in bits.\n");
  printf("please enter the number: ");
  scanf("%u", &number);
  printf("please enter the power: ");
  scanf("%u", &pow);
  unsigned result = power2(number, pow);
  printf(" integer             bits\n");
  displayBits(result);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeaa(%rip),%rdi
call   1030 <printf@plt>
lea    0xf18(%rip),%rdi
call   1030 <printf@plt>
lea    0xf26(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
lea    0xf19(%rip),%rdi
call   1030 <printf@plt>
lea    0xf0a(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1040 <power2@plt>
mov    %eax,-0x10(%rbp)
lea    0xf08(%rip),%rdi
call   1030 <printf@plt>
mov    -0x10(%rbp),%edi
call   1060 <displayBits@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xeda(%rip),%rdi
call   1030 <puts@plt>
lea    0xe98(%rip),%rdi
call   1040 <printf@plt>
lea    0xea6(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0xe95(%rip),%rdi
call   1040 <printf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
mov    0xc(%rsp),%edi
mov    0x8(%rsp),%esi
call   1050 <power2@plt>
mov    %eax,%ebx
lea    0xeff(%rip),%rdi
call   1030 <puts@plt>
mov    %ebx,%edi
call   1070 <displayBits@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [122 x i8] c"This program calculates (number * 2^pow) using the left shift operator\0Aand prints the result and its equivalent in bits.\0A\00"
@.str.1 = [26 x i8] c"please enter the number: \00"
@.str.2 = [3 x i8] c"%u\00"
@.str.3 = [25 x i8] c"please enter the power: \00"
@.str.4 = [27 x i8] c" integer bits\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 @printf(i8* getelementptr inbounds ([122 x i8], [122 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.1, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%8 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %3)
%10 = load i32, i32* %2
%11 = load i32, i32* %3
%12 = call i32 @power2(i32 %10, i32 %11)
store i32 %12, i32* %4
%13 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.4, i64 0, i64 0))
%14 = load i32, i32* %4
%15 = call i32 @displayBits(i32 %14)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [26 x i8] c"please enter the number: \00"
@.str.2 = [3 x i8] c"%u\00"
@.str.3 = [25 x i8] c"please enter the power: \00"
@str = [121 x i8] c"This program calculates (number * 2^pow) using the left shift operator\0Aand prints the result and its equivalent in bits.\00"
@str.5 = [26 x i8] c" integer bits\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([121 x i8], [121 x i8]* @str, i64 0, i64 0))
%6 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.1, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %1)
%8 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%10 = load i32, i32* %1
%11 = load i32, i32* %2
%12 = call i32 @power2(i32 %10, i32 %11)
%13 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str.5, i64 0, i64 0))
%14 = call i32 @displayBits(i32 %12)
ret i32 0
}