#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 EXIT_SUCCESS;
int /*<<< orphan*/ checkInput(double *, double *, double *);
int /*<<< orphan*/ printf(char *, ...);
int main() {
  double num_1, num_2, num_3;
  double averageSum;
  printf("Enter 3 numbers: ");
  checkInput(&num_1, &num_2, &num_3);
  averageSum = (num_1 + num_2 + num_3) / 3;
  printf("Average is %.5lf", averageSum);
  return (EXIT_SUCCESS);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xed2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x10(%rbp),%rdi
lea    -0x18(%rbp),%rsi
lea    -0x20(%rbp),%rdx
call   1040 <checkInput@plt>
movsd  -0x10(%rbp),%xmm0
addsd  -0x18(%rbp),%xmm0
addsd  -0x20(%rbp),%xmm0
movsd  0xe9b(%rip),%xmm1
divsd  %xmm1,%xmm0
movsd  %xmm0,-0x28(%rbp)
movsd  -0x28(%rbp),%xmm0
lea    0xea0(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
mov    0x2e58(%rip),%rax
mov    (%rax),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xedd(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0x10(%rsp),%rdi
lea    0x8(%rsp),%rsi
mov    %rsp,%rdx
call   1040 <checkInput@plt>
movsd  0x10(%rsp),%xmm0
addsd  0x8(%rsp),%xmm0
addsd  (%rsp),%xmm0
divsd  0xea3(%rip),%xmm0
lea    0xeb6(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
mov    0x2e6e(%rip),%rax
mov    (%rax),%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [18 x i8] c"Enter 3 numbers: \00"
@.str.1 = [17 x i8] c"Average is %.5lf\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca i32
%2 = alloca double
%3 = alloca double
%4 = alloca double
%5 = alloca double
store i32 0, i32* %1
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @checkInput(double* %2, double* %3, double* %4)
%8 = load double, double* %2
%9 = load double, double* %3
%10 = fadd double %8, %9
%11 = load double, double* %4
%12 = fadd double %10, %11
%13 = fdiv double %12, 3.000000e+00
store double %13, double* %5
%14 = load double, double* %5
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), double %14)
%16 = load i32, i32* @EXIT_SUCCESS
ret i32 %16
}

LLVM IR (-O2):
@.str = [18 x i8] c"Enter 3 numbers: \00"
@.str.1 = [17 x i8] c"Average is %.5lf\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca double
%2 = alloca double
%3 = alloca double
%4 = bitcast double* %1 to i8*
%5 = bitcast double* %2 to i8*
%6 = bitcast double* %3 to i8*
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @checkInput(double* %1, double* %2, double* %3)
%9 = load double, double* %1
%10 = load double, double* %2
%11 = fadd double %9, %10
%12 = load double, double* %3
%13 = fadd double %11, %12
%14 = fdiv double %13, 3.000000e+00
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), double %14)
%16 = load i32, i32* @EXIT_SUCCESS
ret i32 %16
}