#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 *, float *);
int /*<<< orphan*/ troca(float *, float *);
int main(int argc, char *argv[]) {
  float x, y;
  printf("valor de x: ");
  scanf("%f", &x);
  printf("valor de y: ");
  scanf("%f", &y);
  printf("x = %f; y= %f\n", x, y);
  troca(&x, &y);
  printf("x = %f; y= %f\n", x, y);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb2(%rip),%rdi
lea    -0x14(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xea5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe94(%rip),%rdi
lea    -0x18(%rbp),%rsi
call   1040 <scanf@plt>
movss  -0x14(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  -0x18(%rbp),%xmm1
cvtss2sd %xmm1,%xmm1
lea    0xe82(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
lea    -0x14(%rbp),%rdi
lea    -0x18(%rbp),%rsi
call   1050 <troca@plt>
movss  -0x14(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  -0x18(%rbp),%xmm1
cvtss2sd %xmm1,%xmm1
lea    0xe55(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xec0(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xebf(%rip),%rbx
lea    0xc(%rsp),%r14
mov    %rbx,%rdi
mov    %r14,%rsi
call   1040 <scanf@plt>
lea    0xeab(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0x8(%rsp),%r15
mov    %rbx,%rdi
mov    %r15,%rsi
call   1040 <scanf@plt>
movss  0xc(%rsp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  0x8(%rsp),%xmm1
cvtss2sd %xmm1,%xmm1
lea    0xe86(%rip),%rbx
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
mov    %r14,%rdi
mov    %r15,%rsi
call   1050 <troca@plt>
movss  0xc(%rsp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  0x8(%rsp),%xmm1
cvtss2sd %xmm1,%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [13 x i8] c"valor de x: \00"
@.str.1 = [3 x i8] c"%f\00"
@.str.2 = [13 x i8] c"valor de y: \00"
@.str.3 = [15 x i8] c"x = %f; y= %f\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca float
%7 = alloca float
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), float* %6)
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), float* %7)
%12 = load float, float* %6
%13 = fpext float %12 to double
%14 = load float, float* %7
%15 = fpext float %14 to double
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), double %13, double %15)
%17 = call i32 @troca(float* %6, float* %7)
%18 = load float, float* %6
%19 = fpext float %18 to double
%20 = load float, float* %7
%21 = fpext float %20 to double
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), double %19, double %21)
ret i32 0
}

LLVM IR (-O2):
@.str = [13 x i8] c"valor de x: \00"
@.str.1 = [3 x i8] c"%f\00"
@.str.2 = [13 x i8] c"valor de y: \00"
@.str.3 = [15 x i8] c"x = %f; y= %f\0A\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca float
%4 = alloca float
%5 = bitcast float* %3 to i8*
%6 = bitcast float* %4 to i8*
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), float* %3)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), float* %4)
%11 = load float, float* %3
%12 = fpext float %11 to double
%13 = load float, float* %4
%14 = fpext float %13 to double
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), double %12, double %14)
%16 = call i32 @troca(float* %3, float* %4)
%17 = load float, float* %3
%18 = fpext float %17 to double
%19 = load float, float* %4
%20 = fpext float %19 to double
%21 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), double %18, double %20)
ret i32 0
}