#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;
  fahr = 0;
  printf("%4s%15s\n", "fahr", "celsius");
  while (fahr <= 300) {
    celsius = 5.0 / 9 * (fahr - 32);
    printf("%4.0f%15.1f\n", fahr, celsius);
    fahr = fahr + 20;
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
xorps  %xmm0,%xmm0
movss  %xmm0,-0x8(%rbp)
lea    0xeea(%rip),%rdi
lea    0xeec(%rip),%rsi
lea    0xeea(%rip),%rdx
mov    $0x0,%al
call   1030 <printf@plt>
movss  0xeb5(%rip),%xmm0
ucomiss -0x8(%rbp),%xmm0
jb     11b6 <main+0xa6>
movss  -0x8(%rbp),%xmm0
movss  0xea6(%rip),%xmm1
subss  %xmm1,%xmm0
cvtss2sd %xmm0,%xmm1
movsd  0xe9e(%rip),%xmm0
mulsd  %xmm1,%xmm0
cvtsd2ss %xmm0,%xmm0
movss  %xmm0,-0xc(%rbp)
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  -0xc(%rbp),%xmm1
cvtss2sd %xmm1,%xmm1
lea    0xe96(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movss  0xe5d(%rip),%xmm0
addss  -0x8(%rbp),%xmm0
movss  %xmm0,-0x8(%rbp)
jmp    1143 <main+0x33>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
lea    0xef6(%rip),%rdi
lea    0xef8(%rip),%rsi
lea    0xef6(%rip),%rdx
xor    %eax,%eax
call   1030 <printf@plt>
mov    $0xffffffec,%ebp
lea    0xeeb(%rip),%rbx
nopl   0x0(%rax,%rax,1)
add    $0x14,%ebp
xorps  %xmm1,%xmm1
cvtsi2ss %ebp,%xmm1
xorps  %xmm0,%xmm0
cvtss2sd %xmm1,%xmm0
addss  0xea7(%rip),%xmm1
cvtss2sd %xmm1,%xmm1
mulsd  0xea3(%rip),%xmm1
cvtsd2ss %xmm1,%xmm1
cvtss2sd %xmm1,%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
cmp    $0x119,%ebp
jb     1140 <main+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [9 x i8] c"%4s%15s\0A\00"
@.str.1 = [5 x i8] c"fahr\00"
@.str.2 = [8 x i8] c"celsius\00"
@.str.3 = [13 x i8] c"%4.0f%15.1f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
store i32 0, i32* %1
store float 0.000000e+00, float* %2
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0))
br label %5
5: ; preds = %8, %0
%6 = load float, float* %2
%7 = fcmp ole float %6, 3.000000e+02
br i1 %7, label %8, label %21
8: ; preds = %5
%9 = load float, float* %2
%10 = fsub float %9, 3.200000e+01
%11 = fpext float %10 to double
%12 = fmul double 0x3FE1C71C71C71C72, %11
%13 = fptrunc double %12 to float
store float %13, float* %3
%14 = load float, float* %2
%15 = fpext float %14 to double
%16 = load float, float* %3
%17 = fpext float %16 to double
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double %15, double %17)
%19 = load float, float* %2
%20 = fadd float %19, 2.000000e+01
store float %20, float* %2
br label %5
21: ; preds = %5
ret i32 0
}

LLVM IR (-O2):
@.str = [9 x i8] c"%4s%15s\0A\00"
@.str.1 = [5 x i8] c"fahr\00"
@.str.2 = [8 x i8] c"celsius\00"
@.str.3 = [13 x i8] c"%4.0f%15.1f\0A\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0))
br label %2
2: ; preds = %0, %2
%3 = phi i32 [ 0, %0 ], [ %12, %2 ]
%4 = sitofp i32 %3 to float
%5 = fadd float %4, -3.200000e+01
%6 = fpext float %5 to double
%7 = fmul double %6, 0x3FE1C71C71C71C72
%8 = fptrunc double %7 to float
%9 = fpext float %4 to double
%10 = fpext float %8 to double
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double %9, double %10)
%12 = add nuw nsw i32 %3, 20
%13 = icmp ugt i32 %3, 280
br i1 %13, label %14, label %2
14: ; preds = %2
ret i32 0
}