#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 subtract() {
  double num1, num2, sub;
  printf("===============================================\n");
  printf("Subtraction!\n Please input two numbers:\n");
  scanf("%lf %lf", &num1, &num2);
  sub = num1 - num2;
  printf("%lf - %lf = %lf\n", num1, num2, sub);
  printf("===============================================\n");
}


x86 assembly (clang, -O0):
<subtract>:
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    0xf0f(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0x10(%rbp),%rdx
call   1040 <scanf@plt>
movsd  -0x8(%rbp),%xmm0
subsd  -0x10(%rbp),%xmm0
movsd  %xmm0,-0x18(%rbp)
movsd  -0x8(%rbp),%xmm0
movsd  -0x10(%rbp),%xmm1
movsd  -0x18(%rbp),%xmm2
lea    0xee5(%rip),%rdi
mov    $0x3,%al
call   1030 <printf@plt>
lea    0xe75(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<subtract>:
push   %rbx
sub    $0x10,%rsp
lea    0xf05(%rip),%rbx
mov    %rbx,%rdi
call   1030 <puts@plt>
lea    0xece(%rip),%rdi
call   1030 <puts@plt>
lea    0xea9(%rip),%rdi
lea    0x8(%rsp),%rsi
mov    %rsp,%rdx
call   1050 <scanf@plt>
movsd  0x8(%rsp),%xmm0
movsd  (%rsp),%xmm1
movapd %xmm0,%xmm2
subsd  %xmm1,%xmm2
lea    0xe8a(%rip),%rdi
mov    $0x3,%al
call   1040 <printf@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [49 x i8] c"===============================================\0A\00"
@.str.1 = [41 x i8] c"Subtraction!\0A Please input two numbers:\0A\00"
@.str.2 = [8 x i8] c"%lf %lf\00"
@.str.3 = [17 x i8] c"%lf - %lf = %lf\0A\00"
define void @subtract() {
%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 ([41 x i8], [41 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* %1
%8 = load double, double* %2
%9 = fsub double %7, %8
store double %9, double* %3
%10 = load double, double* %1
%11 = load double, double* %2
%12 = load double, double* %3
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), double %10, double %11, double %12)
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([49 x i8], [49 x i8]* @.str, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str.2 = [8 x i8] c"%lf %lf\00"
@.str.3 = [17 x i8] c"%lf - %lf = %lf\0A\00"
@str.4 = [40 x i8] c"Subtraction!\0A Please input two numbers:\00"
@str.5 = [48 x i8] c"===============================================\00"
define void @subtract() {
%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.5, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([40 x i8], [40 x i8]* @str.4, 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* %1
%9 = load double, double* %2
%10 = fsub double %8, %9
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), double %8, double %9, double %10)
%12 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([48 x i8], [48 x i8]* @str.5, i64 0, i64 0))
ret void
}