#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 */
double fahr_to_celsius(float);
int /*<<< orphan*/ printf(char *, ...);
int main() {
  float fahr, celsius;
  int lower, upper, step;
  lower = 0;
  upper = 300;
  step = 20;
  fahr = lower;
  printf("Fahrenheit\tCelsius\n");
  while (fahr <= upper) {
    printf("%3.0f\t\t%6.1f\n", fahr, fahr_to_celsius(fahr));
    fahr += 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,-0x8(%rbp)
lea    0xeab(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movss  -0x8(%rbp),%xmm1
cvtsi2ssl -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11b1 <main+0x91>
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movsd  %xmm0,-0x20(%rbp)
movss  -0x8(%rbp),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  -0x20(%rbp),%xmm0
lea    0xe7e(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
cvtsi2ssl -0x18(%rbp),%xmm0
addss  -0x8(%rbp),%xmm0
movss  %xmm0,-0x8(%rbp)
jmp    115c <main+0x3c>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xf8e(%rip),%rdi
call   1030 <puts@plt>
xorps  %xmm0,%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
lea    0xf69(%rip),%rbx
xorps  %xmm0,%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe9c(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xecc(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe7e(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xeb2(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe60(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xe98(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe42(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xe7e(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe24(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xe64(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe06(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xe4a(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xde8(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xe30(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xdca(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xe16(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xdac(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xdfc(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd8e(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xde2(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd70(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xdc8(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd52(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xdae(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd34(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xd94(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd16(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xd7a(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xcf8(%rip),%xmm0
call   1050 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movsd  0xd60(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [20 x i8] c"Fahrenheit\09Celsius\0A\00"
@.str.1 = [14 x i8] c"%3.0f\09\09%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* %2
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
br label %10
10: ; preds = %15, %0
%11 = load float, float* %2
%12 = load i32, i32* %5
%13 = sitofp i32 %12 to float
%14 = fcmp ole float %11, %13
br i1 %14, label %15, label %25
15: ; preds = %10
%16 = load float, float* %2
%17 = fpext float %16 to double
%18 = load float, float* %2
%19 = call double @fahr_to_celsius(float %18)
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double %17, double %19)
%21 = load i32, i32* %6
%22 = sitofp i32 %21 to float
%23 = load float, float* %2
%24 = fadd float %23, %22
store float %24, float* %2
br label %10
25: ; preds = %10
%26 = load i32, i32* %1
ret i32 %26
}

LLVM IR (-O2):
@.str.1 = [14 x i8] c"%3.0f\09\09%6.1f\0A\00"
@str = [19 x i8] c"Fahrenheit\09Celsius\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @str, i64 0, i64 0))
%2 = tail call double @fahr_to_celsius(float 0.000000e+00)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 0.000000e+00, double %2)
%4 = tail call double @fahr_to_celsius(float 2.000000e+01)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 2.000000e+01, double %4)
%6 = tail call double @fahr_to_celsius(float 4.000000e+01)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 4.000000e+01, double %6)
%8 = tail call double @fahr_to_celsius(float 6.000000e+01)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 6.000000e+01, double %8)
%10 = tail call double @fahr_to_celsius(float 8.000000e+01)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 8.000000e+01, double %10)
%12 = tail call double @fahr_to_celsius(float 1.000000e+02)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 1.000000e+02, double %12)
%14 = tail call double @fahr_to_celsius(float 1.200000e+02)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 1.200000e+02, double %14)
%16 = tail call double @fahr_to_celsius(float 1.400000e+02)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 1.400000e+02, double %16)
%18 = tail call double @fahr_to_celsius(float 1.600000e+02)
%19 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 1.600000e+02, double %18)
%20 = tail call double @fahr_to_celsius(float 1.800000e+02)
%21 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 1.800000e+02, double %20)
%22 = tail call double @fahr_to_celsius(float 2.000000e+02)
%23 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 2.000000e+02, double %22)
%24 = tail call double @fahr_to_celsius(float 2.200000e+02)
%25 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 2.200000e+02, double %24)
%26 = tail call double @fahr_to_celsius(float 2.400000e+02)
%27 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 2.400000e+02, double %26)
%28 = tail call double @fahr_to_celsius(float 2.600000e+02)
%29 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 2.600000e+02, double %28)
%30 = tail call double @fahr_to_celsius(float 2.800000e+02)
%31 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 2.800000e+02, double %30)
%32 = tail call double @fahr_to_celsius(float 3.000000e+02)
%33 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double 3.000000e+02, double %32)
ret i32 0
}