#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 *);
void calc() {
  double num1;
  double num2;
  printf("Enter first number: ");
  scanf("%lf", &num1);
  printf("Enter second number: ");
  scanf("%lf", &num2);
  printf("Answer: %f.\n", num1 + num2);
}


x86 assembly (clang, -O0):
<calc>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed8(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xecc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeba(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
movsd  -0x8(%rbp),%xmm0
addsd  -0x10(%rbp),%xmm0
lea    0xeba(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<calc>:
push   %rbx
sub    $0x10,%rsp
lea    0xed4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xedb(%rip),%rbx
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
lea    0xecb(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rsp,%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
movsd  0x8(%rsp),%xmm0
addsd  (%rsp),%xmm0
lea    0xebd(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [21 x i8] c"Enter first number: \00"
@.str.1 = [4 x i8] c"%lf\00"
@.str.2 = [22 x i8] c"Enter second number: \00"
@.str.3 = [13 x i8] c"Answer: %f.\0A\00"
define void @calc() {
%1 = alloca double
%2 = alloca double
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %1)
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, 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 = load double, double* %1
%8 = load double, double* %2
%9 = fadd double %7, %8
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double %9)
ret void
}

LLVM IR (-O2):
@.str = [21 x i8] c"Enter first number: \00"
@.str.1 = [4 x i8] c"%lf\00"
@.str.2 = [22 x i8] c"Enter second number: \00"
@.str.3 = [13 x i8] c"Answer: %f.\0A\00"
define void @calc() {
%1 = alloca double
%2 = alloca double
%3 = bitcast double* %1 to i8*
%4 = bitcast double* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 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 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 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* %2)
%9 = load double, double* %1
%10 = load double, double* %2
%11 = fadd double %9, %10
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double %11)
ret void
}