#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 */
float FtoC(float);
int /*<<< orphan*/ printf(char *, ...);
int main(void) {
  float fahr, celsius;
  int lower, upper, step;
  lower = 0;
  upper = 300;
  step = 20;
  printf("F     C\n\n");
  fahr = lower;
  while (fahr <= upper) {
    celsius = FtoC(fahr);
    printf("%3.0f %6.1f\n", fahr, celsius);
    fahr = fahr + step;
  }
  return 0;
}


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)
lea    0xeb5(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
cvtsi2ssl -0x10(%rbp),%xmm0
movss  %xmm0,-0x8(%rbp)
movss  -0x8(%rbp),%xmm1
cvtsi2ssl -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11b6 <main+0x96>
movss  -0x8(%rbp),%xmm0
call   1030 <FtoC@plt>
movss  %xmm0,-0xc(%rbp)
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  -0xc(%rbp),%xmm1
cvtss2sd %xmm1,%xmm1
lea    0xe73(%rip),%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  -0x8(%rbp),%xmm0
cvtsi2ssl -0x18(%rbp),%xmm1
addss  %xmm1,%xmm0
movss  %xmm0,-0x8(%rbp)
jmp    115c <main+0x3c>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xf8d(%rip),%rdi
call   1040 <puts@plt>
xorps  %xmm0,%xmm0
call   1030 <FtoC@plt>
cvtss2sd %xmm0,%xmm1
lea    0xf68(%rip),%rbx
xorps  %xmm0,%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xe9b(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xec7(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xe79(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xea9(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xe57(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xe8b(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xe35(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xe6d(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xe13(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xe4f(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xdf1(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xe31(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xdcf(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xe13(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xdad(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xdf5(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xd8b(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xdd7(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xd69(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xdb9(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xd47(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xd9b(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xd25(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xd7d(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xd03(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xd5f(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xce1(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xd41(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
movss  0xcbf(%rip),%xmm0
call   1030 <FtoC@plt>
xorps  %xmm1,%xmm1
cvtss2sd %xmm0,%xmm1
movsd  0xd23(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1050 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [10 x i8] c"F C\0A\0A\00"
@.str.1 = [13 x i8] c"%3.0f %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 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0))
%8 = load i32, i32* %4
%9 = sitofp i32 %8 to float
store float %9, float* %2
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 %27
15: ; preds = %10
%16 = load float, float* %2
%17 = call float @FtoC(float %16)
store float %17, float* %3
%18 = load float, float* %2
%19 = fpext float %18 to double
%20 = load float, float* %3
%21 = fpext float %20 to double
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double %19, double %21)
%23 = load float, float* %2
%24 = load i32, i32* %6
%25 = sitofp i32 %24 to float
%26 = fadd float %23, %25
store float %26, float* %2
br label %10
27: ; preds = %10
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [13 x i8] c"%3.0f %6.1f\0A\00"
@str = [9 x i8] c"F C\0A\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @str, i64 0, i64 0))
%2 = tail call float @FtoC(float 0.000000e+00)
%3 = fpext float %2 to double
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 0.000000e+00, double %3)
%5 = tail call float @FtoC(float 2.000000e+01)
%6 = fpext float %5 to double
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 2.000000e+01, double %6)
%8 = tail call float @FtoC(float 4.000000e+01)
%9 = fpext float %8 to double
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 4.000000e+01, double %9)
%11 = tail call float @FtoC(float 6.000000e+01)
%12 = fpext float %11 to double
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 6.000000e+01, double %12)
%14 = tail call float @FtoC(float 8.000000e+01)
%15 = fpext float %14 to double
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 8.000000e+01, double %15)
%17 = tail call float @FtoC(float 1.000000e+02)
%18 = fpext float %17 to double
%19 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 1.000000e+02, double %18)
%20 = tail call float @FtoC(float 1.200000e+02)
%21 = fpext float %20 to double
%22 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 1.200000e+02, double %21)
%23 = tail call float @FtoC(float 1.400000e+02)
%24 = fpext float %23 to double
%25 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 1.400000e+02, double %24)
%26 = tail call float @FtoC(float 1.600000e+02)
%27 = fpext float %26 to double
%28 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 1.600000e+02, double %27)
%29 = tail call float @FtoC(float 1.800000e+02)
%30 = fpext float %29 to double
%31 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 1.800000e+02, double %30)
%32 = tail call float @FtoC(float 2.000000e+02)
%33 = fpext float %32 to double
%34 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 2.000000e+02, double %33)
%35 = tail call float @FtoC(float 2.200000e+02)
%36 = fpext float %35 to double
%37 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 2.200000e+02, double %36)
%38 = tail call float @FtoC(float 2.400000e+02)
%39 = fpext float %38 to double
%40 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 2.400000e+02, double %39)
%41 = tail call float @FtoC(float 2.600000e+02)
%42 = fpext float %41 to double
%43 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 2.600000e+02, double %42)
%44 = tail call float @FtoC(float 2.800000e+02)
%45 = fpext float %44 to double
%46 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 2.800000e+02, double %45)
%47 = tail call float @FtoC(float 3.000000e+02)
%48 = fpext float %47 to double
%49 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), double 3.000000e+02, double %48)
ret i32 0
}