#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 = -20;
  upper = 180;
  step = 10;
  celsius = lower;
  printf("%s %s\n", "celsius", "fahr");
  while (celsius <= upper) {
    fahr = celsius * (9.0 / 5.0) + 32.0;
    printf("%5.0f %4.1f\n", celsius, fahr);
    celsius += step;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0xffffffec,-0x10(%rbp)
movl   $0xb4,-0x14(%rbp)
movl   $0xa,-0x18(%rbp)
cvtsi2ssl -0x10(%rbp),%xmm0
movss  %xmm0,-0xc(%rbp)
lea    0xecb(%rip),%rdi
lea    0xecb(%rip),%rsi
lea    0xecc(%rip),%rdx
mov    $0x0,%al
call   1030 <printf@plt>
movss  -0xc(%rbp),%xmm1
cvtsi2ssl -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11cb <main+0xbb>
movss  -0xc(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movsd  0xe82(%rip),%xmm1
mulsd  %xmm1,%xmm0
movsd  0xe7e(%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>
cvtsi2ssl -0x18(%rbp),%xmm0
addss  -0xc(%rbp),%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   %rbp
push   %rbx
push   %rax
lea    0xef6(%rip),%rdi
lea    0xef6(%rip),%rsi
lea    0xef7(%rip),%rdx
xor    %eax,%eax
call   1030 <printf@plt>
mov    $0xffffffe2,%ebp
lea    0xee9(%rip),%rbx
nopl   0x0(%rax,%rax,1)
add    $0xa,%ebp
xorps  %xmm0,%xmm0
cvtsi2ss %ebp,%xmm0
cvtss2sd %xmm0,%xmm0
movaps %xmm0,%xmm1
mulsd  0xea7(%rip),%xmm1
addsd  0xea7(%rip),%xmm1
cvtsd2ss %xmm1,%xmm1
cvtss2sd %xmm1,%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
cmp    $0xab,%ebp
jl     1140 <main+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [7 x i8] c"%s %s\0A\00"
@.str.1 = [8 x i8] c"celsius\00"
@.str.2 = [5 x i8] c"fahr\00"
@.str.3 = [13 x i8] c"%5.0f %4.1f\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 -20, i32* %4
store i32 180, i32* %5
store i32 10, 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 ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, 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 ole float %11, %13
br i1 %14, label %15, label %29
15: ; preds = %10
%16 = load float, float* %3
%17 = fpext float %16 to double
%18 = call double @llvm.fmuladd.f64(double %17, double 1.800000e+00, double 3.200000e+01)
%19 = fptrunc double %18 to float
store float %19, float* %2
%20 = load float, float* %3
%21 = fpext float %20 to double
%22 = load float, float* %2
%23 = fpext float %22 to double
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double %21, double %23)
%25 = load i32, i32* %6
%26 = sitofp i32 %25 to float
%27 = load float, float* %3
%28 = fadd float %27, %26
store float %28, float* %3
br label %10
29: ; preds = %10
%30 = load i32, i32* %1
ret i32 %30
}

LLVM IR (-O2):
@.str = [7 x i8] c"%s %s\0A\00"
@.str.1 = [8 x i8] c"celsius\00"
@.str.2 = [5 x i8] c"fahr\00"
@.str.3 = [13 x i8] c"%5.0f %4.1f\0A\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
br label %2
2: ; preds = %0, %2
%3 = phi i32 [ -20, %0 ], [ %10, %2 ]
%4 = sitofp i32 %3 to float
%5 = fpext float %4 to double
%6 = tail call double @llvm.fmuladd.f64(double %5, double 1.800000e+00, double 3.200000e+01)
%7 = fptrunc double %6 to float
%8 = fpext float %7 to double
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double %5, double %8)
%10 = add nsw i32 %3, 10
%11 = icmp sgt i32 %3, 170
br i1 %11, label %12, label %2
12: ; preds = %2
ret i32 0
}