#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 f2c(float);
int /*<<< orphan*/ printf(char *, ...);
main() {
  float fahr;
  int lower, upper, step;
  lower = 0;
  upper = 300;
  step = 20;
  fahr = lower;
  printf("Fahrenheit Celsius\n");
  while (fahr <= upper) {
    printf("%10.0f %7.1f\n", fahr, f2c(fahr));
    fahr = fahr + step;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0xc(%rbp)
movl   $0x12c,-0x10(%rbp)
movl   $0x14,-0x14(%rbp)
cvtsi2ssl -0xc(%rbp),%xmm0
movss  %xmm0,-0x8(%rbp)
lea    0xeab(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movss  -0x8(%rbp),%xmm1
cvtsi2ssl -0x10(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11b5 <main+0x95>
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movsd  %xmm0,-0x20(%rbp)
movss  -0x8(%rbp),%xmm0
call   1040 <f2c@plt>
movaps %xmm0,%xmm1
movsd  -0x20(%rbp),%xmm0
lea    0xe7e(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movss  -0x8(%rbp),%xmm0
cvtsi2ssl -0x14(%rbp),%xmm1
addss  %xmm1,%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 <f2c@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 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xecc(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe7e(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xeb2(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe60(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xe98(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe42(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xe7e(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe24(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xe64(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xe06(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xe4a(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xde8(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xe30(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xdca(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xe16(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xdac(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xdfc(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd8e(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xde2(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd70(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xdc8(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd52(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xdae(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd34(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xd94(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xd16(%rip),%xmm0
call   1050 <f2c@plt>
movaps %xmm0,%xmm1
movsd  0xd7a(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movss  0xcf8(%rip),%xmm0
call   1050 <f2c@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 Celsius\0A\00"
@.str.1 = [14 x i8] c"%10.0f %7.1f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %3
store i32 300, i32* %4
store i32 20, i32* %5
%6 = load i32, i32* %3
%7 = sitofp i32 %6 to float
store float %7, float* %2
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
br label %9
9: ; preds = %14, %0
%10 = load float, float* %2
%11 = load i32, i32* %4
%12 = sitofp i32 %11 to float
%13 = fcmp ole float %10, %12
br i1 %13, label %14, label %24
14: ; preds = %9
%15 = load float, float* %2
%16 = fpext float %15 to double
%17 = load float, float* %2
%18 = call double @f2c(float %17)
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), double %16, double %18)
%20 = load float, float* %2
%21 = load i32, i32* %5
%22 = sitofp i32 %21 to float
%23 = fadd float %20, %22
store float %23, float* %2
br label %9
24: ; preds = %9
%25 = load i32, i32* %1
ret i32 %25
}

LLVM IR (-O2):
@.str.1 = [14 x i8] c"%10.0f %7.1f\0A\00"
@str = [19 x i8] c"Fahrenheit Celsius\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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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 @f2c(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
}