#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_s(char *, int *);
int /*<<< orphan*/ system(char *);
main() {
  int fahrenheit;
  float celsius;
  printf("Enter fahrenheit value: ");
  scanf_s("%d", &fahrenheit);
  celsius = (fahrenheit - 32) / 1.8;
  printf("Result of celsius is: %.3f", celsius);
  printf("\n");
  system("pause");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xec9(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xed4(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1050 <scanf_s@plt>
mov    -0x4(%rbp),%eax
sub    $0x20,%eax
cvtsi2sd %eax,%xmm0
movsd  0xe98(%rip),%xmm1
divsd  %xmm1,%xmm0
cvtsd2ss %xmm0,%xmm0
movss  %xmm0,-0x8(%rbp)
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
lea    0xe9f(%rip),%rdi
mov    $0x1,%al
call   1040 <printf@plt>
lea    0xeac(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xea0(%rip),%rdi
call   1030 <system@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xec0(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xecb(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1060 <scanf_s@plt>
mov    0x4(%rsp),%eax
add    $0xffffffe0,%eax
cvtsi2sd %eax,%xmm0
divsd  0xe8d(%rip),%xmm0
cvtsd2ss %xmm0,%xmm0
cvtss2sd %xmm0,%xmm0
lea    0xea2(%rip),%rdi
mov    $0x1,%al
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xea5(%rip),%rdi
call   1040 <system@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [25 x i8] c"Enter fahrenheit value: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [27 x i8] c"Result of celsius is: %.3f\00"
@.str.3 = [2 x i8] c"\0A\00"
@.str.4 = [6 x i8] c"pause\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf_s(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = sub nsw i32 %5, 32
%7 = sitofp i32 %6 to double
%8 = fdiv double %7, 1.800000e+00
%9 = fptrunc double %8 to float
store float %9, float* %2
%10 = load float, float* %2
%11 = fpext float %10 to double
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.2, i64 0, i64 0), double %11)
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%14 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [25 x i8] c"Enter fahrenheit value: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [27 x i8] c"Result of celsius is: %.3f\00"
@.str.4 = [6 x i8] c"pause\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf_s(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = add nsw i32 %5, -32
%7 = sitofp i32 %6 to double
%8 = fdiv double %7, 1.800000e+00
%9 = fptrunc double %8 to float
%10 = fpext float %9 to double
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @.str.2, i64 0, i64 0), double %10)
%12 = call i32 @putchar(i32 10)
%13 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0))
ret i32 0
}