#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 *, ...);
main() {
  float fahr, celsius;
  float lower, upper, step;
  lower = 0;
  upper = 300;
  step = 20;
  fahr = lower;
  printf(" __________________________\n");
  printf("|Fahrenheit\tCelcius|\n");
  printf(" --------------------------\n");
  while (fahr <= upper) {
    celsius = 5 * (fahr - 32) / 9;
    printf("%3.0f\t\t%3.3f\n", fahr, celsius);
    fahr = fahr + step;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
xorps  %xmm0,%xmm0
movss  %xmm0,-0x10(%rbp)
movss  0xed5(%rip),%xmm0
movss  %xmm0,-0x14(%rbp)
movss  0xec4(%rip),%xmm0
movss  %xmm0,-0x18(%rbp)
movss  -0x10(%rbp),%xmm0
movss  %xmm0,-0x8(%rbp)
lea    0xec2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movss  -0x8(%rbp),%xmm1
movss  -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11ea <main+0xda>
movss  -0x8(%rbp),%xmm1
movss  0xe7b(%rip),%xmm0
subss  %xmm0,%xmm1
movss  0xe6b(%rip),%xmm0
mulss  %xmm1,%xmm0
movss  0xe5b(%rip),%xmm1
divss  %xmm1,%xmm0
movss  %xmm0,-0xc(%rbp)
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  -0xc(%rbp),%xmm1
cvtss2sd %xmm1,%xmm1
lea    0xe95(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movss  -0x8(%rbp),%xmm0
addss  -0x18(%rbp),%xmm0
movss  %xmm0,-0x8(%rbp)
jmp    1175 <main+0x65>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
lea    0xef0(%rip),%rdi
call   1030 <puts@plt>
lea    0xf00(%rip),%rdi
call   1030 <puts@plt>
lea    0xf09(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffec,%ebp
lea    0xeb9(%rip),%rbx
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
add    $0x14,%ebp
xorps  %xmm1,%xmm1
cvtsi2ss %ebp,%xmm1
xorps  %xmm0,%xmm0
cvtss2sd %xmm1,%xmm0
addss  0xe87(%rip),%xmm1
mulss  0xe83(%rip),%xmm1
divss  0xe7f(%rip),%xmm1
cvtss2sd %xmm1,%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
cmp    $0x119,%ebp
jb     1160 <main+0x40>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [29 x i8] c" __________________________\0A\00"
@.str.1 = [22 x i8] c"|Fahrenheit\09Celcius|\0A\00"
@.str.2 = [29 x i8] c" --------------------------\0A\00"
@.str.3 = [14 x i8] c"%3.0f\09\09%3.3f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca float
%5 = alloca float
%6 = alloca float
store i32 0, i32* %1
store float 0.000000e+00, float* %4
store float 3.000000e+02, float* %5
store float 2.000000e+01, float* %6
%7 = load float, float* %4
store float %7, float* %2
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0))
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.1, i64 0, i64 0))
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0))
br label %11
11: ; preds = %15, %0
%12 = load float, float* %2
%13 = load float, float* %5
%14 = fcmp ole float %12, %13
br i1 %14, label %15, label %28
15: ; preds = %11
%16 = load float, float* %2
%17 = fsub float %16, 3.200000e+01
%18 = fmul float 5.000000e+00, %17
%19 = fdiv float %18, 9.000000e+00
store float %19, float* %3
%20 = load float, float* %2
%21 = fpext float %20 to double
%22 = load float, float* %3
%23 = fpext float %22 to double
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.3, i64 0, i64 0), double %21, double %23)
%25 = load float, float* %2
%26 = load float, float* %6
%27 = fadd float %25, %26
store float %27, float* %2
br label %11
28: ; preds = %11
%29 = load i32, i32* %1
ret i32 %29
}

LLVM IR (-O2):
@.str.3 = [14 x i8] c"%3.0f\09\09%3.3f\0A\00"
@str = [28 x i8] c" __________________________\00"
@str.4 = [21 x i8] c"|Fahrenheit\09Celcius|\00"
@str.5 = [28 x i8] c" --------------------------\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @str.4, i64 0, i64 0))
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @str.5, i64 0, i64 0))
br label %4
4: ; preds = %0, %4
%5 = phi i32 [ 0, %0 ], [ %13, %4 ]
%6 = sitofp i32 %5 to float
%7 = fadd float %6, -3.200000e+01
%8 = fmul float %7, 5.000000e+00
%9 = fdiv float %8, 9.000000e+00
%10 = fpext float %6 to double
%11 = fpext float %9 to double
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.3, i64 0, i64 0), double %10, double %11)
%13 = add nuw nsw i32 %5, 20
%14 = icmp ugt i32 %5, 280
br i1 %14, label %15, label %4
15: ; preds = %4
ret i32 0
}