#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 main() {
  double a, b;
  printf("Please enter a and b, seperated by a space: ");
  scanf("%lf %lf", &a, &b);
  if (a > b) {
    a = a + b;
    b = a - b;
    a = a - b;
  }
  printf("%.1lf %.1lf\n", a, b);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xee9(%rip),%rdi
lea    -0x10(%rbp),%rsi
lea    -0x18(%rbp),%rdx
call   1040 <scanf@plt>
movsd  -0x10(%rbp),%xmm0
ucomisd -0x18(%rbp),%xmm0
jbe    118e <main+0x6e>
movsd  -0x10(%rbp),%xmm0
addsd  -0x18(%rbp),%xmm0
movsd  %xmm0,-0x10(%rbp)
movsd  -0x10(%rbp),%xmm0
subsd  -0x18(%rbp),%xmm0
movsd  %xmm0,-0x18(%rbp)
movsd  -0x10(%rbp),%xmm0
subsd  -0x18(%rbp),%xmm0
movsd  %xmm0,-0x10(%rbp)
movsd  -0x10(%rbp),%xmm0
movsd  -0x18(%rbp),%xmm1
lea    0xe96(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xed5(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xef4(%rip),%rdi
lea    0x10(%rsp),%rsi
lea    0x8(%rsp),%rdx
call   1040 <scanf@plt>
movsd  0x10(%rsp),%xmm0
movsd  0x8(%rsp),%xmm1
ucomisd %xmm1,%xmm0
jbe    117a <main+0x5a>
addsd  %xmm1,%xmm0
movapd %xmm0,%xmm2
subsd  %xmm1,%xmm2
movsd  %xmm2,0x8(%rsp)
subsd  %xmm2,%xmm0
movsd  %xmm0,0x10(%rsp)
movapd %xmm2,%xmm1
lea    0xeb4(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [45 x i8] c"Please enter a and b, seperated by a space: \00"
@.str.1 = [8 x i8] c"%lf %lf\00"
@.str.2 = [13 x i8] c"%.1lf %.1lf\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca double
%3 = alloca double
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([45 x i8], [45 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* %2, double* %3)
%6 = load double, double* %2
%7 = load double, double* %3
%8 = fcmp ogt double %6, %7
br i1 %8, label %9, label %19
9: ; preds = %0
%10 = load double, double* %2
%11 = load double, double* %3
%12 = fadd double %10, %11
store double %12, double* %2
%13 = load double, double* %2
%14 = load double, double* %3
%15 = fsub double %13, %14
store double %15, double* %3
%16 = load double, double* %2
%17 = load double, double* %3
%18 = fsub double %16, %17
store double %18, double* %2
br label %19
19: ; preds = %9, %0
%20 = load double, double* %2
%21 = load double, double* %3
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double %20, double %21)
ret i32 0
}

LLVM IR (-O2):
@.str = [45 x i8] c"Please enter a and b, seperated by a space: \00"
@.str.1 = [8 x i8] c"%lf %lf\00"
@.str.2 = [13 x i8] c"%.1lf %.1lf\0A\00"
define i32 @main() {
%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 ([45 x i8], [45 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* %1
%8 = load double, double* %2
%9 = fcmp ogt double %7, %8
br i1 %9, label %10, label %14
10: ; preds = %0
%11 = fadd double %7, %8
%12 = fsub double %11, %8
store double %12, double* %2
%13 = fsub double %11, %12
store double %13, double* %1
br label %14
14: ; preds = %10, %0
%15 = phi double [ %12, %10 ], [ %8, %0 ]
%16 = phi double [ %13, %10 ], [ %7, %0 ]
%17 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double %16, double %15)
ret i32 0
}