#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 step, lower, upper, fahr;
  float cel;
  step = 20;
  lower = 0;
  upper = 300;
  printf("Fahrenheit  Celsius\n");
  for (fahr = upper; fahr >= lower; fahr = fahr - step) {
    cel = (5.0 / 9.0) * (fahr - 32);
    printf("       %3d   %6.1f\n", fahr, cel);
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x14,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
movl   $0x12c,-0x10(%rbp)
lea    0xecd(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0xc(%rbp),%eax
jl     119b <main+0x8b>
mov    -0x14(%rbp),%eax
sub    $0x20,%eax
cvtsi2sd %eax,%xmm1
movsd  0xe9a(%rip),%xmm0
mulsd  %xmm1,%xmm0
cvtsd2ss %xmm0,%xmm0
movss  %xmm0,-0x18(%rbp)
mov    -0x14(%rbp),%esi
movss  -0x18(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
lea    0xe97(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
sub    -0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
jmp    1148 <main+0x38>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xf6c(%rip),%rdi
call   1030 <puts@plt>
lea    0xf4c(%rip),%rbx
movsd  0xec4(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x12c,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xeb5(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x118,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xea6(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x104,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe97(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xf0,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe88(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xdc,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe79(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xc8,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe6a(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xb4,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe5b(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xa0,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe4c(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x8c,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe3d(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x78,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe2e(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x64,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe1f(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x50,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe10(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x3c,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe01(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x28,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xdf2(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x14,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xde3(%rip),%xmm0
mov    %rbx,%rdi
xor    %esi,%esi
mov    $0x1,%al
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [21 x i8] c"Fahrenheit Celsius\0A\00"
@.str.1 = [20 x i8] c" %3d %6.1f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
%6 = alloca float
store i32 0, i32* %1
store i32 20, i32* %2
store i32 0, i32* %3
store i32 300, i32* %4
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%8 = load i32, i32* %4
store i32 %8, i32* %5
br label %9
9: ; preds = %23, %0
%10 = load i32, i32* %5
%11 = load i32, i32* %3
%12 = icmp sge i32 %10, %11
br i1 %12, label %13, label %27
13: ; preds = %9
%14 = load i32, i32* %5
%15 = sub nsw i32 %14, 32
%16 = sitofp i32 %15 to double
%17 = fmul double 0x3FE1C71C71C71C72, %16
%18 = fptrunc double %17 to float
store float %18, float* %6
%19 = load i32, i32* %5
%20 = load float, float* %6
%21 = fpext float %20 to double
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 %19, double %21)
br label %23
23: ; preds = %13
%24 = load i32, i32* %5
%25 = load i32, i32* %2
%26 = sub nsw i32 %24, %25
store i32 %26, i32* %5
br label %9
27: ; preds = %9
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [20 x i8] c" %3d %6.1f\0A\00"
@str = [20 x i8] c"Fahrenheit Celsius\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 300, double 0x40629C71C0000000)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 280, double 0x406138E380000000)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 260, double 0x405FAAAAA0000000)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 240, double 0x405CE38E40000000)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 220, double 0x405A1C71C0000000)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 200, double 0x4057555560000000)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 180, double 0x40548E38E0000000)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 160, double 0x4051C71C80000000)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 140, double 6.000000e+01)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 120, double 0x404871C720000000)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 100, double 0x4042E38E40000000)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 80, double 0x403AAAAAA0000000)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 60, double 0x402F1C71C0000000)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 40, double 0x4011C71C80000000)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 20, double 0xC01AAAAAA0000000)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 0, double 0xC031C71C80000000)
ret i32 0
}