#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() {
  int fahr, celcius;
  int lower, upper, step;
  lower = 0;
  upper = 300;
  step = 20;
  printf("%s  %s\n", "fahrenheit", "celcius");
  for (fahr = upper; fahr >= lower; fahr = fahr - step) {
    celcius = (5 * (fahr - 32)) / 9;
    printf("%10d  %7d\n", fahr, celcius);
  }
}


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)
lea    0xec5(%rip),%rdi
lea    0xec6(%rip),%rsi
lea    0xeca(%rip),%rdx
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0x10(%rbp),%eax
jl     1198 <main+0x88>
mov    -0x8(%rbp),%eax
sub    $0x20,%eax
imul   $0x5,%eax,%eax
mov    $0x9,%ecx
cltd
idiv   %ecx
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
sub    -0x18(%rbp),%eax
mov    %eax,-0x8(%rbp)
jmp    1156 <main+0x46>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xee8(%rip),%rdi
lea    0xee9(%rip),%rsi
lea    0xeed(%rip),%rdx
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xee7(%rip),%rbx
mov    %rbx,%rdi
mov    $0x12c,%esi
mov    $0x94,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x118,%esi
mov    $0x89,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x104,%esi
mov    $0x7e,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xf0,%esi
mov    $0x73,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xdc,%esi
mov    $0x68,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xc8,%esi
mov    $0x5d,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xb4,%esi
mov    $0x52,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xa0,%esi
mov    $0x47,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x8c,%esi
mov    $0x3c,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x78,%esi
mov    $0x30,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x64,%esi
mov    $0x25,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x50,%esi
mov    $0x1a,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x3c,%esi
mov    $0xf,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x28,%esi
mov    $0x4,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x14,%esi
mov    $0xfffffffa,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
xor    %esi,%esi
mov    $0xffffffef,%edx
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [8 x i8] c"%s %s\0A\00"
@.str.1 = [11 x i8] c"fahrenheit\00"
@.str.2 = [8 x i8] c"celcius\00"
@.str.3 = [11 x i8] c"%10d %7d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%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 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0))
%8 = load i32, i32* %5
store i32 %8, i32* %2
br label %9
9: ; preds = %21, %0
%10 = load i32, i32* %2
%11 = load i32, i32* %4
%12 = icmp sge i32 %10, %11
br i1 %12, label %13, label %25
13: ; preds = %9
%14 = load i32, i32* %2
%15 = sub nsw i32 %14, 32
%16 = mul nsw i32 5, %15
%17 = sdiv i32 %16, 9
store i32 %17, i32* %3
%18 = load i32, i32* %2
%19 = load i32, i32* %3
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 %18, i32 %19)
br label %21
21: ; preds = %13
%22 = load i32, i32* %2
%23 = load i32, i32* %6
%24 = sub nsw i32 %22, %23
store i32 %24, i32* %2
br label %9
25: ; preds = %9
%26 = load i32, i32* %1
ret i32 %26
}

LLVM IR (-O2):
@.str = [8 x i8] c"%s %s\0A\00"
@.str.1 = [11 x i8] c"fahrenheit\00"
@.str.2 = [8 x i8] c"celcius\00"
@.str.3 = [11 x i8] c"%10d %7d\0A\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0))
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 300, i32 148)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 280, i32 137)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 260, i32 126)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 240, i32 115)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 220, i32 104)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 200, i32 93)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 180, i32 82)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 160, i32 71)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 140, i32 60)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 120, i32 48)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 100, i32 37)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 80, i32 26)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 60, i32 15)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 40, i32 4)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 20, i32 -6)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 0, i32 -17)
ret i32 0
}