#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;
  celsius = lower;
  printf("centigrade  fahrenheit\n");
  while (celsius < upper) {
    fahr = 9.0 * celsius / 5.0 + 32.0;
    printf("   %3.0f      %6.1f\n", celsius, fahr);
    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,-0xc(%rbp)
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movss  -0xc(%rbp),%xmm1
cvtsi2ssl -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jbe    11c9 <main+0xb9>
movss  -0xc(%rbp),%xmm0
cvtss2sd %xmm0,%xmm1
movsd  0xea0(%rip),%xmm0
mulsd  %xmm1,%xmm0
movsd  0xe8c(%rip),%xmm1
divsd  %xmm1,%xmm0
movsd  0xe78(%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    0xe82(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
cvtsi2ssl -0x18(%rbp),%xmm0
addss  -0xc(%rbp),%xmm0
movss  %xmm0,-0xc(%rbp)
jmp    114c <main+0x3c>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
lea    0xf03(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffec,%ebp
lea    0xedd(%rip),%rbx
nopl   0x0(%rax,%rax,1)
add    $0x14,%ebp
xorps  %xmm0,%xmm0
cvtsi2ss %ebp,%xmm0
cvtss2sd %xmm0,%xmm0
movaps %xmm0,%xmm1
mulsd  0xea7(%rip),%xmm1
divsd  0xea7(%rip),%xmm1
addsd  0xea7(%rip),%xmm1
cvtsd2ss %xmm1,%xmm1
cvtss2sd %xmm1,%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
cmp    $0x118,%ebp
jb     1140 <main+0x20>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

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

LLVM IR (-O2):
@.str.1 = [21 x i8] c" %3.0f %6.1f\0A\00"
@str = [23 x i8] c"centigrade fahrenheit\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @str, 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 = fpext float %4 to double
%6 = fmul double %5, 9.000000e+00
%7 = fdiv double %6, 5.000000e+00
%8 = fadd double %7, 3.200000e+01
%9 = fptrunc double %8 to float
%10 = fpext float %9 to double
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0), double %5, double %10)
%12 = add nuw nsw i32 %3, 20
%13 = icmp ult i32 %3, 280
br i1 %13, label %2, label %14
14: ; preds = %2
ret i32 0
}