#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 *, double *);
int divide() {
  double num1, num2, div;
  printf("Division!\n please input two numbers:");
  scanf("%lf %lf", &num1, &num2);
  if (num2 == 0) {
    printf("Error:divisor can not be zero!\n");
    printf("===========================================\n");
  } else {
    div = num1 / num2;
    printf("%lf / %lf = %lf\n", num1, num2, div);
  }
  printf("===========================================\n");
  return 0;
}


x86 assembly (clang, -O0):
<divide>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xee8(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0x10(%rbp),%rdx
call   1040 <scanf@plt>
movsd  -0x10(%rbp),%xmm0
xorps  %xmm1,%xmm1
ucomisd %xmm1,%xmm0
jne    1183 <divide+0x63>
jp     1183 <divide+0x63>
lea    0xec4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11af <divide+0x8f>
movsd  -0x8(%rbp),%xmm0
divsd  -0x10(%rbp),%xmm0
movsd  %xmm0,-0x18(%rbp)
movsd  -0x8(%rbp),%xmm0
movsd  -0x10(%rbp),%xmm1
movsd  -0x18(%rbp),%xmm2
lea    0xed2(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
lea    0xe97(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<divide>:
sub    $0x18,%rsp
lea    0xec5(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xedc(%rip),%rdi
lea    0x10(%rsp),%rsi
lea    0x8(%rsp),%rdx
call   1050 <scanf@plt>
movsd  0x8(%rsp),%xmm1
xorpd  %xmm0,%xmm0
ucomisd %xmm0,%xmm1
jne    1184 <divide+0x54>
jp     1184 <divide+0x54>
lea    0xecd(%rip),%rdi
call   1030 <puts@plt>
lea    0xee0(%rip),%rdi
call   1030 <puts@plt>
jmp    11a0 <divide+0x70>
movsd  0x10(%rsp),%xmm0
movapd %xmm0,%xmm2
divsd  %xmm1,%xmm2
lea    0xe94(%rip),%rdi
mov    $0x3,%al
call   1040 <printf@plt>
lea    0xeb6(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [37 x i8] c"Division!\0A please input two numbers:\00"
@.str.1 = [8 x i8] c"%lf %lf\00"
@.str.2 = [32 x i8] c"Error:divisor can not be zero!\0A\00"
@.str.3 = [45 x i8] c"===========================================\0A\00"
@.str.4 = [17 x i8] c"%lf / %lf = %lf\0A\00"
define i32 @divide() {
%1 = alloca double
%2 = alloca double
%3 = alloca double
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), double* %1, double* %2)
%6 = load double, double* %2
%7 = fcmp oeq double %6, 0.000000e+00
br i1 %7, label %8, label %11
8: ; preds = %0
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.2, i64 0, i64 0))
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([45 x i8], [45 x i8]* @.str.3, i64 0, i64 0))
br label %19
11: ; preds = %0
%12 = load double, double* %1
%13 = load double, double* %2
%14 = fdiv double %12, %13
store double %14, double* %3
%15 = load double, double* %1
%16 = load double, double* %2
%17 = load double, double* %3
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.4, i64 0, i64 0), double %15, double %16, double %17)
br label %19
19: ; preds = %11, %8
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([45 x i8], [45 x i8]* @.str.3, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [37 x i8] c"Division!\0A please input two numbers:\00"
@.str.1 = [8 x i8] c"%lf %lf\00"
@.str.4 = [17 x i8] c"%lf / %lf = %lf\0A\00"
@str.5 = [31 x i8] c"Error:divisor can not be zero!\00"
@str.6 = [44 x i8] c"===========================================\00"
define i32 @divide() {
%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 ([37 x i8], [37 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), double* %1, double* %2)
%7 = load double, double* %2
%8 = fcmp oeq double %7, 0.000000e+00
br i1 %8, label %9, label %12
9: ; preds = %0
%10 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([31 x i8], [31 x i8]* @str.5, i64 0, i64 0))
%11 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([44 x i8], [44 x i8]* @str.6, i64 0, i64 0))
br label %16
12: ; preds = %0
%13 = load double, double* %1
%14 = fdiv double %13, %7
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.4, i64 0, i64 0), double %13, double %7, double %14)
br label %16
16: ; preds = %12, %9
%17 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([44 x i8], [44 x i8]* @str.6, i64 0, i64 0))
ret i32 0
}