#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 *, ...);
int main() {
  int fahr, celsius;
  int lower, upper, step;
  lower = 0;
  upper = 300;
  step = 20;
  celsius = lower;
  printf("celius\tfahr\n");
  while (celsius <= upper) {
    fahr = celsius * 9 / 5 + 32;
    printf("%d\t%d\n", celsius, fahr);
    celsius = celsius + 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)
mov    -0x10(%rbp),%eax
mov    %eax,-0xc(%rbp)
lea    0xebf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
cmp    -0x14(%rbp),%eax
jg     1188 <main+0x78>
imul   $0x9,-0xc(%rbp),%eax
mov    $0x5,%ecx
cltd
idiv   %ecx
add    $0x20,%eax
mov    %eax,-0x8(%rbp)
mov    -0xc(%rbp),%esi
mov    -0x8(%rbp),%edx
lea    0xe9a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    -0x18(%rbp),%eax
mov    %eax,-0xc(%rbp)
jmp    1148 <main+0x38>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
lea    0xedc(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffec,%ebx
mov    $0x20,%ebp
lea    0xebf(%rip),%r14
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
add    $0x14,%ebx
mov    %r14,%rdi
mov    %ebx,%esi
mov    %ebp,%edx
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x24,%ebp
cmp    $0x119,%ebx
jb     1150 <main+0x30>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [13 x i8] c"celius\09fahr\0A\00"
@.str.1 = [7 x i8] c"%d\09%d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%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
store i32 %7, i32* %3
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0))
br label %9
9: ; preds = %13, %0
%10 = load i32, i32* %3
%11 = load i32, i32* %5
%12 = icmp sle i32 %10, %11
br i1 %12, label %13, label %24
13: ; preds = %9
%14 = load i32, i32* %3
%15 = mul nsw i32 %14, 9
%16 = sdiv i32 %15, 5
%17 = add nsw i32 %16, 32
store i32 %17, i32* %2
%18 = load i32, i32* %3
%19 = load i32, i32* %2
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32 %18, i32 %19)
%21 = load i32, i32* %3
%22 = load i32, i32* %6
%23 = add nsw i32 %21, %22
store i32 %23, i32* %3
br label %9
24: ; preds = %9
%25 = load i32, i32* %1
ret i32 %25
}

LLVM IR (-O2):
@.str.1 = [7 x i8] c"%d\09%d\0A\00"
@str = [12 x i8] c"celius\09fahr\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str, i64 0, i64 0))
br label %2
2: ; preds = %0, %2
%3 = phi i32 [ 0, %0 ], [ %10, %2 ]
%4 = trunc i32 %3 to i16
%5 = mul nuw nsw i16 %4, 9
%6 = udiv i16 %5, 5
%7 = add nuw nsw i16 %6, 32
%8 = zext i16 %7 to i32
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32 %3, i32 %8)
%10 = add nuw nsw i32 %3, 20
%11 = icmp ult i32 %3, 281
br i1 %11, label %2, label %12
12: ; preds = %2
ret i32 0
}