#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 *, float, double);
main() {
  float fahr, celsius;
  int lower, upper, step;
  lower = 0;
  upper = 300;
  step = 20;
  fahr = lower;
  while (fahr <= upper) {
    printf("%3.0f\t%6.1f\n", fahr, fahr_to_celsius(fahr));
    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)
movss  -0x8(%rbp),%xmm1
cvtsi2ssl -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11a1 <main+0x81>
movss  -0x8(%rbp),%xmm0
movss  %xmm0,-0x1c(%rbp)
movss  -0x8(%rbp),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
movss  -0x1c(%rbp),%xmm0
lea    0xe7c(%rip),%rdi
call   1030 <printf@plt>
movss  -0x8(%rbp),%xmm0
cvtsi2ssl -0x18(%rbp),%xmm1
addss  %xmm1,%xmm0
movss  %xmm0,-0x8(%rbp)
jmp    114e <main+0x2e>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
xorps  %xmm0,%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
lea    0xf09(%rip),%rbx
xorps  %xmm0,%xmm0
mov    %rbx,%rdi
call   1030 <printf@plt>
movss  0xeba(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xea7(%rip),%xmm0
call   1030 <printf@plt>
movss  0xe9e(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xe8b(%rip),%xmm0
call   1030 <printf@plt>
movss  0xe82(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xe6f(%rip),%xmm0
call   1030 <printf@plt>
movss  0xe66(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xe53(%rip),%xmm0
call   1030 <printf@plt>
movss  0xe4a(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xe37(%rip),%xmm0
call   1030 <printf@plt>
movss  0xe2e(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xe1b(%rip),%xmm0
call   1030 <printf@plt>
movss  0xe12(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xdff(%rip),%xmm0
call   1030 <printf@plt>
movss  0xdf6(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xde3(%rip),%xmm0
call   1030 <printf@plt>
movss  0xdda(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xdc7(%rip),%xmm0
call   1030 <printf@plt>
movss  0xdbe(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xdab(%rip),%xmm0
call   1030 <printf@plt>
movss  0xda2(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xd8f(%rip),%xmm0
call   1030 <printf@plt>
movss  0xd86(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xd73(%rip),%xmm0
call   1030 <printf@plt>
movss  0xd6a(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xd57(%rip),%xmm0
call   1030 <printf@plt>
movss  0xd4e(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xd3b(%rip),%xmm0
call   1030 <printf@plt>
movss  0xd32(%rip),%xmm0
call   1040 <fahr_to_celsius@plt>
movaps %xmm0,%xmm1
mov    %rbx,%rdi
movss  0xd1f(%rip),%xmm0
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

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

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