#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() {
  float cel, fahr;
  int low, step, upper;
  low = 0;
  step = 20;
  upper = 300;
  cel = low;
  while (cel <= upper) {
    fahr = cel * (9.0 / 5.0) + 32.0;
    printf("%3.0f %6.1f\n", cel, fahr);
    cel += step;
  }
  int fahr2;
  printf("\n\n");
  for (fahr2 = 300; fahr2 >= 0; fahr2 = fahr2 - 20)
    printf("%3d %6.1f\n", fahr2, (5.0 / 9.0) * (fahr2 - 32));
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x10(%rbp)
movl   $0x14,-0x14(%rbp)
movl   $0x12c,-0x18(%rbp)
cvtsi2ssl -0x10(%rbp),%xmm0
movss  %xmm0,-0x8(%rbp)
movss  -0x8(%rbp),%xmm1
cvtsi2ssl -0x18(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jb     11af <main+0x9f>
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movsd  0xea6(%rip),%xmm1
mulsd  %xmm1,%xmm0
movsd  0xea2(%rip),%xmm1
addsd  %xmm1,%xmm0
cvtsd2ss %xmm0,%xmm0
movss  %xmm0,-0xc(%rbp)
movss  -0x8(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  -0xc(%rbp),%xmm1
cvtss2sd %xmm1,%xmm1
lea    0xe84(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
cvtsi2ssl -0x14(%rbp),%xmm0
addss  -0x8(%rbp),%xmm0
movss  %xmm0,-0x8(%rbp)
jmp    113e <main+0x2e>
lea    0xe6f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x12c,-0x1c(%rbp)
cmpl   $0x0,-0x1c(%rbp)
jl     1203 <main+0xf3>
mov    -0x1c(%rbp),%esi
mov    -0x1c(%rbp),%eax
sub    $0x20,%eax
cvtsi2sd %eax,%xmm1
movsd  0xe1d(%rip),%xmm0
mulsd  %xmm1,%xmm0
lea    0xe3a(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
mov    -0x1c(%rbp),%eax
sub    $0x14,%eax
mov    %eax,-0x1c(%rbp)
jmp    11c4 <main+0xb4>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0x1040(%rip),%rbx
movsd  0xed0(%rip),%xmm1
xorps  %xmm0,%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xec3(%rip),%xmm0
movsd  0xec3(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xeb9(%rip),%xmm0
movsd  0xeb9(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xeaf(%rip),%xmm0
movsd  0xeaf(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xea5(%rip),%xmm0
movsd  0xea5(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe9b(%rip),%xmm0
movsd  0xe9b(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe91(%rip),%xmm0
movsd  0xe91(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe87(%rip),%xmm1
mov    %rbx,%rdi
movsd  0xe44(%rip),%xmm0
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe75(%rip),%xmm0
movsd  0xe75(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe6b(%rip),%xmm0
movsd  0xe6b(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe61(%rip),%xmm0
movsd  0xe61(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe57(%rip),%xmm0
movsd  0xe57(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe4d(%rip),%xmm0
movsd  0xe4d(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe43(%rip),%xmm0
movsd  0xe43(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe39(%rip),%xmm0
movsd  0xe39(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe2f(%rip),%xmm0
movsd  0xe2f(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
lea    0xeb4(%rip),%rdi
call   1030 <puts@plt>
lea    0xe9f(%rip),%rbx
movsd  0xe12(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x12c,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe03(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x118,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xdf4(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x104,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xde5(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xf0,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xdd6(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xdc,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xdc7(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xc8,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xdb8(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xb4,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xda9(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xa0,%esi
mov    $0x1,%al
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x8c,%esi
movsd  0xc8a(%rip),%xmm0
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xd83(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x78,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xd74(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x64,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xd65(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x50,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xd56(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x3c,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xd47(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x28,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xd38(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x14,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xd29(%rip),%xmm0
mov    %rbx,%rdi
xor    %esi,%esi
mov    $0x1,%al
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [13 x i8] c"%3.0f %6.1f\0A\00"
@.str.1 = [3 x i8] c"\0A\0A\00"
@.str.2 = [11 x i8] c"%3d %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
%7 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %4
store i32 20, i32* %5
store i32 300, i32* %6
%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* %6
%13 = sitofp i32 %12 to float
%14 = fcmp ole float %11, %13
br i1 %14, label %15, label %29
15: ; preds = %10
%16 = load float, float* %2
%17 = fpext float %16 to double
%18 = call double @llvm.fmuladd.f64(double %17, double 1.800000e+00, double 3.200000e+01)
%19 = fptrunc double %18 to float
store float %19, float* %3
%20 = load float, float* %2
%21 = fpext float %20 to double
%22 = load float, float* %3
%23 = fpext float %22 to double
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double %21, double %23)
%25 = load i32, i32* %5
%26 = sitofp i32 %25 to float
%27 = load float, float* %2
%28 = fadd float %27, %26
store float %28, float* %2
br label %10
29: ; preds = %10
%30 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
store i32 300, i32* %7
br label %31
31: ; preds = %41, %29
%32 = load i32, i32* %7
%33 = icmp sge i32 %32, 0
br i1 %33, label %34, label %44
34: ; preds = %31
%35 = load i32, i32* %7
%36 = load i32, i32* %7
%37 = sub nsw i32 %36, 32
%38 = sitofp i32 %37 to double
%39 = fmul double 0x3FE1C71C71C71C72, %38
%40 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 %35, double %39)
br label %41
41: ; preds = %34
%42 = load i32, i32* %7
%43 = sub nsw i32 %42, 20
store i32 %43, i32* %7
br label %31
44: ; preds = %31
%45 = load i32, i32* %1
ret i32 %45
}

LLVM IR (-O2):
@.str = [13 x i8] c"%3.0f %6.1f\0A\00"
@.str.2 = [11 x i8] c"%3d %6.1f\0A\00"
@str = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 0.000000e+00, double 3.200000e+01)
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 2.000000e+01, double 6.800000e+01)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 4.000000e+01, double 1.040000e+02)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 6.000000e+01, double 1.400000e+02)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 8.000000e+01, double 1.760000e+02)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 1.000000e+02, double 2.120000e+02)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 1.200000e+02, double 2.480000e+02)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 1.400000e+02, double 2.840000e+02)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 1.600000e+02, double 3.200000e+02)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 1.800000e+02, double 3.560000e+02)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 2.000000e+02, double 3.920000e+02)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 2.200000e+02, double 4.280000e+02)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 2.400000e+02, double 4.640000e+02)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 2.600000e+02, double 5.000000e+02)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 2.800000e+02, double 5.360000e+02)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), double 3.000000e+02, double 5.720000e+02)
%17 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([2 x i8], [2 x i8]* @str, i64 0, i64 0))
%18 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 300, double 0x40629C71C71C71C7)
%19 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 280, double 0x406138E38E38E38E)
%20 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 260, double 0x405FAAAAAAAAAAAB)
%21 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 240, double 0x405CE38E38E38E39)
%22 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 220, double 0x405A1C71C71C71C7)
%23 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 200, double 0x4057555555555556)
%24 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 180, double 0x40548E38E38E38E4)
%25 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 160, double 0x4051C71C71C71C72)
%26 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 140, double 6.000000e+01)
%27 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 120, double 0x404871C71C71C71D)
%28 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 100, double 0x4042E38E38E38E39)
%29 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 80, double 0x403AAAAAAAAAAAAB)
%30 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 60, double 0x402F1C71C71C71C8)
%31 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 40, double 0x4011C71C71C71C72)
%32 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 20, double 0xC01AAAAAAAAAAAAB)
%33 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32 0, double 0xC031C71C71C71C72)
ret i32 0
}