#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;
  lower = -20;
  upper = 160;
  step = 7;
  celsius = lower;
  printf("Celsius\t\tFahrenheit\n");
  printf("-------------------------\n");
  while (celsius <= upper) {
    fahr = celsius / (5.0 / 9.0) + 32.0;
    printf("%6.1f\t\t%4.1f\n", celsius, fahr);
    celsius = celsius + step;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0xffffffec,-0x10(%rbp)
movl   $0xa0,-0x14(%rbp)
movl   $0x7,-0x18(%rbp)
cvtsi2ssl -0x10(%rbp),%xmm0
movss  %xmm0,-0xc(%rbp)
lea    0xecb(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movss  -0xc(%rbp),%xmm1
cvtsi2ssl -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11cf <main+0xbf>
movss  -0xc(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movsd  0xe8a(%rip),%xmm1
divsd  %xmm1,%xmm0
movsd  0xe76(%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    0xe90(%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    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    0xef4(%rip),%rdi
call   1030 <puts@plt>
lea    0xefc(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffe5,%ebp
lea    0xec9(%rip),%rbx
nopw   0x0(%rax,%rax,1)
add    $0x7,%ebp
xorps  %xmm0,%xmm0
cvtsi2ss %ebp,%xmm0
cvtss2sd %xmm0,%xmm0
movaps %xmm0,%xmm1
divsd  0xe97(%rip),%xmm1
addsd  0xe97(%rip),%xmm1
cvtsd2ss %xmm1,%xmm1
cvtss2sd %xmm1,%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
cmp    $0x9a,%ebp
jl     1150 <main+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [21 x i8] c"Celsius\09\09Fahrenheit\0A\00"
@.str.1 = [27 x i8] c"-------------------------\0A\00"
@.str.2 = [14 x i8] c"%6.1f\09\09%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 160, i32* %5
store i32 7, 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 ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0))
br label %11
11: ; preds = %16, %0
%12 = load float, float* %3
%13 = load i32, i32* %5
%14 = sitofp i32 %13 to float
%15 = fcmp ole float %12, %14
br i1 %15, label %16, label %31
16: ; preds = %11
%17 = load float, float* %3
%18 = fpext float %17 to double
%19 = fdiv double %18, 0x3FE1C71C71C71C72
%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 ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), double %23, double %25)
%27 = load float, float* %3
%28 = load i32, i32* %6
%29 = sitofp i32 %28 to float
%30 = fadd float %27, %29
store float %30, float* %3
br label %11
31: ; preds = %11
%32 = load i32, i32* %1
ret i32 %32
}

LLVM IR (-O2):
@.str.2 = [14 x i8] c"%6.1f\09\09%4.1f\0A\00"
@str = [20 x i8] c"Celsius\09\09Fahrenheit\00"
@str.3 = [26 x i8] c"-------------------------\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 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str.3, i64 0, i64 0))
br label %3
3: ; preds = %0, %3
%4 = phi i32 [ -20, %0 ], [ %12, %3 ]
%5 = sitofp i32 %4 to float
%6 = fpext float %5 to double
%7 = fdiv double %6, 0x3FE1C71C71C71C72
%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 ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), double %6, double %10)
%12 = add nsw i32 %4, 7
%13 = icmp sgt i32 %4, 153
br i1 %13, label %14, label %3
14: ; preds = %3
ret i32 0
}