#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() {
  double fahr, celsius, lower, upper, step;
  lower = 0.0;
  upper = 300.0;
  step = 20.0;
  printf("%2s %5s\n----------\n", "F", "C");
  fahr = lower;
  while (fahr <= upper) {
    celsius = (5.0 / 9.0) * (fahr - 32.0);
    printf("%3.0f %6.1f\n", fahr, celsius);
    fahr = fahr + step;
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
xorps  %xmm0,%xmm0
movsd  %xmm0,-0x20(%rbp)
movsd  0xed9(%rip),%xmm0
movsd  %xmm0,-0x28(%rbp)
movsd  0xec4(%rip),%xmm0
movsd  %xmm0,-0x30(%rbp)
lea    0xed8(%rip),%rdi
lea    0xee5(%rip),%rsi
lea    0xee0(%rip),%rdx
mov    $0x0,%al
call   1030 <printf@plt>
movsd  -0x20(%rbp),%xmm0
movsd  %xmm0,-0x10(%rbp)
movsd  -0x10(%rbp),%xmm1
movsd  -0x28(%rbp),%xmm0
ucomisd %xmm1,%xmm0
jb     11c9 <main+0xb9>
movsd  -0x10(%rbp),%xmm1
movsd  0xe90(%rip),%xmm0
subsd  %xmm0,%xmm1
movsd  0xe7c(%rip),%xmm0
mulsd  %xmm1,%xmm0
movsd  %xmm0,-0x18(%rbp)
movsd  -0x10(%rbp),%xmm0
movsd  -0x18(%rbp),%xmm1
lea    0xe8a(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  -0x10(%rbp),%xmm0
addsd  -0x30(%rbp),%xmm0
movsd  %xmm0,-0x10(%rbp)
jmp    1167 <main+0x57>
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xfd8(%rip),%rdi
lea    0xfe5(%rip),%rsi
lea    0xfe0(%rip),%rdx
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xfd4(%rip),%rbx
movsd  0xec4(%rip),%xmm1
xorps  %xmm0,%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xeb7(%rip),%xmm0
movsd  0xeb7(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xead(%rip),%xmm0
movsd  0xead(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xea3(%rip),%xmm0
movsd  0xea3(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe99(%rip),%xmm0
movsd  0xe99(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe8f(%rip),%xmm0
movsd  0xe8f(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe85(%rip),%xmm0
movsd  0xe85(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe7b(%rip),%xmm0
mov    %rbx,%rdi
movsd  0xe30(%rip),%xmm1
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe69(%rip),%xmm0
movsd  0xe69(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe5f(%rip),%xmm0
movsd  0xe5f(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe55(%rip),%xmm0
movsd  0xe55(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe4b(%rip),%xmm0
movsd  0xe4b(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe41(%rip),%xmm0
movsd  0xe41(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe37(%rip),%xmm0
movsd  0xe37(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe2d(%rip),%xmm0
movsd  0xe2d(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
movsd  0xe23(%rip),%xmm0
movsd  0xe23(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [20 x i8] c"%2s %5s\0A----------\0A\00"
@.str.1 = [2 x i8] c"F\00"
@.str.2 = [2 x i8] c"C\00"
@.str.3 = [13 x i8] c"%3.0f %6.1f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca double
%3 = alloca double
%4 = alloca double
%5 = alloca double
%6 = alloca double
store i32 0, i32* %1
store double 0.000000e+00, double* %4
store double 3.000000e+02, double* %5
store double 2.000000e+01, double* %6
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%8 = load double, double* %4
store double %8, double* %2
br label %9
9: ; preds = %13, %0
%10 = load double, double* %2
%11 = load double, double* %5
%12 = fcmp ole double %10, %11
br i1 %12, label %13, label %23
13: ; preds = %9
%14 = load double, double* %2
%15 = fsub double %14, 3.200000e+01
%16 = fmul double 0x3FE1C71C71C71C72, %15
store double %16, double* %3
%17 = load double, double* %2
%18 = load double, double* %3
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double %17, double %18)
%20 = load double, double* %2
%21 = load double, double* %6
%22 = fadd double %20, %21
store double %22, double* %2
br label %9
23: ; preds = %9
%24 = load i32, i32* %1
ret i32 %24
}

LLVM IR (-O2):
@.str = [20 x i8] c"%2s %5s\0A----------\0A\00"
@.str.1 = [2 x i8] c"F\00"
@.str.2 = [2 x i8] c"C\00"
@.str.3 = [13 x i8] c"%3.0f %6.1f\0A\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 0.000000e+00, double 0xC031C71C71C71C72)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 2.000000e+01, double 0xC01AAAAAAAAAAAAB)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 4.000000e+01, double 0x4011C71C71C71C72)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 6.000000e+01, double 0x402F1C71C71C71C8)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 8.000000e+01, double 0x403AAAAAAAAAAAAB)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 1.000000e+02, double 0x4042E38E38E38E39)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 1.200000e+02, double 0x404871C71C71C71D)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 1.400000e+02, double 6.000000e+01)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 1.600000e+02, double 0x4051C71C71C71C72)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 1.800000e+02, double 0x40548E38E38E38E4)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 2.000000e+02, double 0x4057555555555556)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 2.200000e+02, double 0x405A1C71C71C71C7)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 2.400000e+02, double 0x405CE38E38E38E39)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 2.600000e+02, double 0x405FAAAAAAAAAAAB)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 2.800000e+02, double 0x406138E38E38E38E)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0), double 3.000000e+02, double 0x40629C71C71C71C7)
ret i32 0
}