#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*/ getchar();
int /*<<< orphan*/ printf(char *, ...);
int main(void) {
  int ten = 10;
  int two = 2;
  printf("Doing it right: ");
  printf("%d minus %d is %d\n", ten, 2, ten - two);
  printf("Doing it wrong: ");
  printf("%d minus %d is %d\n", ten);
  getchar();
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0xa,-0x8(%rbp)
movl   $0x2,-0xc(%rbp)
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
mov    -0x8(%rbp),%ecx
sub    -0xc(%rbp),%ecx
lea    0xeb6(%rip),%rdi
mov    $0x2,%edx
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
lea    0xe92(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    $0x0,%al
call   1040 <getchar@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xed8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xedb(%rip),%rbx
mov    %rbx,%rdi
mov    $0xa,%esi
mov    $0x2,%edx
mov    $0x8,%ecx
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xece(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xa,%esi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
call   1040 <getchar@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [17 x i8] c"Doing it right: \00"
@.str.1 = [19 x i8] c"%d minus %d is %d\0A\00"
@.str.2 = [17 x i8] c"Doing it wrong: \00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 10, i32* %2
store i32 2, i32* %3
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%5 = load i32, i32* %2
%6 = load i32, i32* %2
%7 = load i32, i32* %3
%8 = sub nsw i32 %6, %7
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0), i32 %5, i32 2, i32 %8)
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0))
%11 = load i32, i32* %2
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0), i32 %11)
%13 = call i32 (...) @getchar()
ret i32 0
}

LLVM IR (-O2):
@.str = [17 x i8] c"Doing it right: \00"
@.str.1 = [19 x i8] c"%d minus %d is %d\0A\00"
@.str.2 = [17 x i8] c"Doing it wrong: \00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0), i32 10, i32 2, i32 8)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0))
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0), i32 10)
%5 = tail call i32 (...) @getchar()
ret i32 0
}