#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 main() {
  float fahr, celsius;
  int lower, upper, step;
  lower = 0;
  upper = 300;
  step = 20;
  fahr = lower;
  printf("Cels  Fahr\n");
  printf("==========\n");
  while (celsius <= upper) {
    fahr = (9.0 * celsius / 5.0) + 32;
    printf("%3.0f %6.1f\n", celsius, fahr);
    celsius = celsius + step;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x10(%rbp)
movl   $0x12c,-0x14(%rbp)
movl   $0x14,-0x18(%rbp)
cvtsi2ssl -0x10(%rbp),%xmm0
movss  %xmm0,-0x8(%rbp)
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movss  -0xc(%rbp),%xmm1
cvtsi2ssl -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11db <main+0xcb>
movss  -0xc(%rbp),%xmm0
cvtss2sd %xmm0,%xmm1
movsd  0xe92(%rip),%xmm0
mulsd  %xmm1,%xmm0
movsd  0xe7e(%rip),%xmm1
divsd  %xmm1,%xmm0
movsd  0xe6a(%rip),%xmm1
addsd  %xmm1,%xmm0
cvtsd2ss %xmm0,%xmm0
movss  %xmm0,-0x8(%rbp)
movss  -0xc(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  -0x8(%rbp),%xmm1
cvtss2sd %xmm1,%xmm1
lea    0xe74(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movss  -0xc(%rbp),%xmm0
cvtsi2ssl -0x18(%rbp),%xmm1
addss  %xmm1,%xmm0
movss  %xmm0,-0xc(%rbp)
jmp    115a <main+0x4a>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xee8(%rip),%rdi
call   1030 <puts@plt>
lea    0xee7(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [12 x i8] c"Cels Fahr\0A\00"
@.str.1 = [12 x i8] c"==========\0A\00"
@.str.2 = [13 x i8] c"%3.0f %6.1f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca i32
%5 = alloca i32
%6 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %4
store i32 300, i32* %5
store i32 20, i32* %6
%7 = load i32, i32* %4
%8 = sitofp i32 %7 to float
store float %8, float* %2
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0))
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0))
br label %11
11: ; preds = %16, %0
%12 = load float, float* %3
%13 = load i32, i32* %5
%14 = sitofp i32 %13 to float
%15 = fcmp ole float %12, %14
br i1 %15, label %16, label %32
16: ; preds = %11
%17 = load float, float* %3
%18 = fpext float %17 to double
%19 = fmul double 9.000000e+00, %18
%20 = fdiv double %19, 5.000000e+00
%21 = fadd double %20, 3.200000e+01
%22 = fptrunc double %21 to float
store float %22, float* %2
%23 = load float, float* %3
%24 = fpext float %23 to double
%25 = load float, float* %2
%26 = fpext float %25 to double
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double %24, double %26)
%28 = load float, float* %3
%29 = load i32, i32* %6
%30 = sitofp i32 %29 to float
%31 = fadd float %28, %30
store float %31, float* %3
br label %11
32: ; preds = %11
%33 = load i32, i32* %1
ret i32 %33
}

LLVM IR (-O2):
@str = [11 x i8] c"Cels Fahr\00"
@str.3 = [11 x i8] c"==========\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str.3, i64 0, i64 0))
ret i32 0
}