#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 getchar();
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, float *);
main() {
  float F, C;
  printf("\n ** CONVERSOR DE TEMPERATURA FAHRENHEIT EM CELSIUS **\n");
  printf("\nDigite a temperatura em Fahrenheit: ");
  scanf("%f", &F);
  C = 5.0 / 9.0 * (F - 32.0);
  printf("\nA temperatura em Celsius e: %i.\n", C);
  printf("\n\n<< Marco_Tulio >>");
  getchar(), getchar();
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xefb(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf13(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1050 <scanf@plt>
movss  -0x4(%rbp),%xmm0
cvtss2sd %xmm0,%xmm1
movsd  0xe93(%rip),%xmm0
subsd  %xmm0,%xmm1
movsd  0xe7f(%rip),%xmm0
mulsd  %xmm1,%xmm0
cvtsd2ss %xmm0,%xmm0
movss  %xmm0,-0x8(%rbp)
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
lea    0xed3(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
lea    0xee7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    $0x0,%al
call   1040 <getchar@plt>
mov    $0x0,%al
call   1040 <getchar@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xf27(%rip),%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xed4(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1060 <scanf@plt>
movss  0x4(%rsp),%xmm0
cvtss2sd %xmm0,%xmm0
addsd  0xe82(%rip),%xmm0
mulsd  0xe82(%rip),%xmm0
cvtsd2ss %xmm0,%xmm0
cvtss2sd %xmm0,%xmm0
lea    0xea4(%rip),%rdi
mov    $0x1,%al
call   1040 <printf@plt>
lea    0xeb8(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
call   1050 <getchar@plt>
xor    %eax,%eax
call   1050 <getchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [56 x i8] c"\0A ** CONVERSOR DE TEMPERATURA FAHRENHEIT EM CELSIUS **\0A\00"
@.str.1 = [38 x i8] c"\0ADigite a temperatura em Fahrenheit: \00"
@.str.2 = [3 x i8] c"%f\00"
@.str.3 = [34 x i8] c"\0AA temperatura em Celsius e: %i.\0A\00"
@.str.4 = [20 x i8] c"\0A\0A<< Marco_Tulio >>\00"
define i32 @main() {
%1 = alloca float
%2 = alloca float
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([56 x i8], [56 x i8]* @.str, i64 0, i64 0))
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.1, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), float* %1)
%6 = load float, float* %1
%7 = fpext float %6 to double
%8 = fsub double %7, 3.200000e+01
%9 = fmul double 0x3FE1C71C71C71C72, %8
%10 = fptrunc double %9 to float
store float %10, float* %2
%11 = load float, float* %2
%12 = fpext float %11 to double
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.3, i64 0, i64 0), double %12)
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.4, i64 0, i64 0))
%15 = call i32 (...) @getchar()
%16 = call i32 (...) @getchar()
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [38 x i8] c"\0ADigite a temperatura em Fahrenheit: \00"
@.str.2 = [3 x i8] c"%f\00"
@.str.3 = [34 x i8] c"\0AA temperatura em Celsius e: %i.\0A\00"
@.str.4 = [20 x i8] c"\0A\0A<< Marco_Tulio >>\00"
@str = [55 x i8] c"\0A ** CONVERSOR DE TEMPERATURA FAHRENHEIT EM CELSIUS **\00"
define i32 @main() {
%1 = alloca float
%2 = bitcast float* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([55 x i8], [55 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([38 x i8], [38 x i8]* @.str.1, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), float* %1)
%6 = load float, float* %1
%7 = fpext float %6 to double
%8 = fadd double %7, -3.200000e+01
%9 = fmul double %8, 0x3FE1C71C71C71C72
%10 = fptrunc double %9 to float
%11 = fpext float %10 to double
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @.str.3, i64 0, i64 0), double %11)
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.4, i64 0, i64 0))
%14 = call i32 (...) @getchar()
%15 = call i32 (...) @getchar()
ret i32 0
}