#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*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, double *);
int main() {
  double a, b, temp;
  printf("Enter the value of a: \n");
  scanf("%lf", &a);
  printf("Enter the value of b: \n");
  scanf("%lf", &b);
  temp = b;
  b = a;
  a = temp;
  printf("After swapping the values are:\na = %lf\nb = %lf\n", a, b);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed4(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xec8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb6(%rip),%rdi
lea    -0x18(%rbp),%rsi
call   1040 <scanf@plt>
movsd  -0x18(%rbp),%xmm0
movsd  %xmm0,-0x20(%rbp)
movsd  -0x10(%rbp),%xmm0
movsd  %xmm0,-0x18(%rbp)
movsd  -0x20(%rbp),%xmm0
movsd  %xmm0,-0x10(%rbp)
movsd  -0x10(%rbp),%xmm0
movsd  -0x18(%rbp),%xmm1
lea    0xe9a(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xef8(%rip),%rdi
call   1030 <puts@plt>
lea    0xeb8(%rip),%rbx
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
lea    0xeef(%rip),%rdi
call   1030 <puts@plt>
mov    %rsp,%rsi
mov    %rbx,%rdi
call   1050 <scanf@plt>
movsd  (%rsp),%xmm0
movsd  0x8(%rsp),%xmm1
movsd  %xmm1,(%rsp)
movsd  %xmm0,0x8(%rsp)
lea    0xe7b(%rip),%rdi
mov    $0x2,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [24 x i8] c"Enter the value of a: \0A\00"
@.str.1 = [4 x i8] c"%lf\00"
@.str.2 = [24 x i8] c"Enter the value of b: \0A\00"
@.str.3 = [48 x i8] c"After swapping the values are:\0Aa = %lf\0Ab = %lf\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca double
%3 = alloca double
%4 = alloca double
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %2)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %3)
%9 = load double, double* %3
store double %9, double* %4
%10 = load double, double* %2
store double %10, double* %3
%11 = load double, double* %4
store double %11, double* %2
%12 = load double, double* %2
%13 = load double, double* %3
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([48 x i8], [48 x i8]* @.str.3, i64 0, i64 0), double %12, double %13)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [4 x i8] c"%lf\00"
@.str.3 = [48 x i8] c"After swapping the values are:\0Aa = %lf\0Ab = %lf\0A\00"
@str = [23 x i8] c"Enter the value of a: \00"
@str.4 = [23 x i8] c"Enter the value of b: \00"
define i32 @main() {
%1 = alloca double
%2 = alloca double
%3 = bitcast double* %1 to i8*
%4 = bitcast double* %2 to i8*
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %1)
%7 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @str.4, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %2)
%9 = load double, double* %2
%10 = load double, double* %1
store double %10, double* %2
store double %9, double* %1
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([48 x i8], [48 x i8]* @.str.3, i64 0, i64 0), double %9, double %10)
ret i32 0
}