#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 *, ...);
main() {
  float fahr, celsius;
  int lower, upper, step;
  printf("C      F\n\n");
  lower = 0;
  upper = 100;
  step = 5;
  celsius = lower;
  while (celsius <= upper) {
    fahr = (9.0 / 5.0) * celsius + 32.0;
    printf("%3.0f %6.0f\n", celsius, fahr);
    celsius = celsius + step;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeea(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x10(%rbp)
movl   $0x64,-0x14(%rbp)
movl   $0x5,-0x18(%rbp)
cvtsi2ssl -0x10(%rbp),%xmm0
movss  %xmm0,-0xc(%rbp)
movss  -0xc(%rbp),%xmm1
cvtsi2ssl -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11c1 <main+0xb1>
movss  -0xc(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movsd  0xe90(%rip),%xmm1
mulsd  %xmm1,%xmm0
movsd  0xe8c(%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    0xe79(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movss  -0xc(%rbp),%xmm0
cvtsi2ssl -0x18(%rbp),%xmm1
addss  %xmm1,%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    0xef3(%rip),%rdi
call   1030 <puts@plt>
mov    $0xfffffffb,%ebp
lea    0xed5(%rip),%rbx
nopl   0x0(%rax,%rax,1)
add    $0x5,%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   1040 <printf@plt>
cmp    $0x60,%ebp
jb     1140 <main+0x20>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [11 x i8] c"C F\0A\0A\00"
@.str.1 = [13 x i8] c"%3.0f %6.0f\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
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %4
store i32 100, i32* %5
store i32 5, i32* %6
%8 = load i32, i32* %4
%9 = sitofp i32 %8 to float
store float %9, float* %3
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 1.800000e+00, double %17, 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.1, i64 0, i64 0), double %21, double %23)
%25 = load float, float* %3
%26 = load i32, i32* %6
%27 = sitofp i32 %26 to float
%28 = fadd float %25, %27
store float %28, float* %3
br label %10
29: ; preds = %10
%30 = load i32, i32* %1
ret i32 %30
}

LLVM IR (-O2):
@.str.1 = [13 x i8] c"%3.0f %6.0f\0A\00"
@str = [10 x i8] c"C F\0A\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @str, i64 0, i64 0))
br label %2
2: ; preds = %0, %2
%3 = phi i32 [ 0, %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.1, i64 0, i64 0), double %5, double %8)
%10 = add nuw nsw i32 %3, 5
%11 = icmp ugt i32 %3, 95
br i1 %11, label %12, label %2
12: ; preds = %2
ret i32 0
}