#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 *);
void divide() {
  double num1, num2, div;
  printf("===============================================\n");
  printf("Division!\n Please input two numbers:\n");
  scanf("%lf %lf", &num1, &num2);
  if (num2 == 0) {
    printf("Error:divisor cannot be aero!\n");
    printf("===============================================\n");
  } else {
    div = num1 / num2;
    printf("%lf / %lf = %lf\n", num1, num2, div);
    printf("===============================================\n");
  }
}


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    0xef4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf0c(%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    1191 <divide+0x71>
jp     1191 <divide+0x71>
lea    0xee8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe7b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11cb <divide+0xab>
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    0xec8(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
lea    0xe3c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<divide>:
sub    $0x18,%rsp
lea    0xf21(%rip),%rdi
call   1030 <puts@plt>
lea    0xed2(%rip),%rdi
call   1030 <puts@plt>
lea    0xead(%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    1182 <divide+0x52>
jp     1182 <divide+0x52>
lea    0xec3(%rip),%rdi
call   1030 <puts@plt>
jmp    119e <divide+0x6e>
movsd  0x10(%rsp),%xmm0
movapd %xmm0,%xmm2
divsd  %xmm1,%xmm2
lea    0xe71(%rip),%rdi
mov    $0x3,%al
call   1040 <printf@plt>
lea    0xeb7(%rip),%rdi
call   1030 <puts@plt>
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [49 x i8] c"===============================================\0A\00"
@.str.1 = [38 x i8] c"Division!\0A Please input two numbers:\0A\00"
@.str.2 = [8 x i8] c"%lf %lf\00"
@.str.3 = [31 x i8] c"Error:divisor cannot be aero!\0A\00"
@.str.4 = [17 x i8] c"%lf / %lf = %lf\0A\00"
define void @divide() {
%1 = alloca double
%2 = alloca double
%3 = alloca double
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([49 x i8], [49 x i8]* @.str, i64 0, i64 0))
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.1, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, 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 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.3, i64 0, i64 0))
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([49 x i8], [49 x i8]* @.str, i64 0, i64 0))
br label %21
12: ; preds = %0
%13 = load double, double* %1
%14 = load double, double* %2
%15 = fdiv double %13, %14
store double %15, double* %3
%16 = load double, double* %1
%17 = load double, double* %2
%18 = load double, double* %3
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.4, i64 0, i64 0), double %16, double %17, double %18)
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([49 x i8], [49 x i8]* @.str, i64 0, i64 0))
br label %21
21: ; preds = %12, %9
ret void
}

LLVM IR (-O2):
@.str.2 = [8 x i8] c"%lf %lf\00"
@.str.4 = [17 x i8] c"%lf / %lf = %lf\0A\00"
@str.5 = [37 x i8] c"Division!\0A Please input two numbers:\00"
@str.7 = [30 x i8] c"Error:divisor cannot be aero!\00"
@str.8 = [48 x i8] c"===============================================\00"
define void @divide() {
%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 ([48 x i8], [48 x i8]* @str.8, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([37 x i8], [37 x i8]* @str.5, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0), double* %1, double* %2)
%8 = load double, double* %2
%9 = fcmp oeq double %8, 0.000000e+00
br i1 %9, label %10, label %12
10: ; preds = %0
%11 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str.7, i64 0, i64 0))
br label %16
12: ; preds = %0
%13 = load double, double* %1
%14 = fdiv double %13, %8
%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 %8, double %14)
br label %16
16: ; preds = %12, %10
%17 = phi i8* [ getelementptr inbounds ([48 x i8], [48 x i8]* @str.8, i64 0, i64 0), %12 ], [ getelementptr inbounds ([48 x i8], [48 x i8]* @str.8, i64 0, i64 0), %10 ]
%18 = call i32 @puts(i8* dereferenceable(1) %17)
ret void
}