#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 calculate(int);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int num;
  printf("Please input an integer value > 0: ");
  scanf("%d", &num);
  if (num < 0) {
    printf("Invalid input.\n");
    exit(1);
  }
  printf("Sum of even-valued fibs < %d: %d\n", num, calculate(num));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeaa(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec0(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
cmpl   $0x0,-0x8(%rbp)
jge    118f <main+0x4f>
lea    0xea9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%edi
call   1040 <calculate@plt>
mov    -0xc(%rbp),%esi
mov    %eax,%edx
lea    0xe8e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xea4(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xeba(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1060 <scanf@plt>
mov    0xc(%rsp),%ebx
test   %ebx,%ebx
js     119d <main+0x4d>
mov    %ebx,%edi
call   1050 <calculate@plt>
lea    0xe9d(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret
lea    0xea5(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [36 x i8] c"Please input an integer value > 0: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [16 x i8] c"Invalid input.\0A\00"
@.str.3 = [34 x i8] c"Sum of even-valued fibs < %d: %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%5 = load i32, i32* %2
%6 = icmp slt i32 %5, 0
br i1 %6, label %7, label %10
7: ; preds = %0
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 @exit(i32 1)
unreachable
10: ; preds = %0
%11 = load i32, i32* %2
%12 = load i32, i32* %2
%13 = call i32 @calculate(i32 %12)
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.3, i64 0, i64 0), i32 %11, i32 %13)
ret i32 0
}

LLVM IR (-O2):
@.str = [36 x i8] c"Please input an integer value > 0: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.3 = [34 x i8] c"Sum of even-valued fibs < %d: %d\0A\00"
@str = [15 x i8] c"Invalid input.\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = icmp slt i32 %5, 0
br i1 %6, label %7, label %10
7: ; preds = %0
%8 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @str, i64 0, i64 0))
%9 = call i32 @exit(i32 1)
unreachable
10: ; preds = %0
%11 = call i32 @calculate(i32 %5)
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @.str.3, i64 0, i64 0), i32 %5, i32 %11)
ret i32 0
}