#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 *, ...);
main() {
  int a = 10, b = 20;
  printf("a = %d\n", a);
  printf("b = %d\n", b);
  printf("a+b = %d\n", a + b);
  printf("\nPress any key to end...");
  getchar();
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0xa,-0x4(%rbp)
movl   $0x14,-0x8(%rbp)
mov    -0x4(%rbp),%esi
lea    0xec0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
lea    0xeb9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%esi
add    -0x8(%rbp),%esi
lea    0xea3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe9f(%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   %rax
lea    0xed8(%rip),%rdi
mov    $0xa,%esi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xecf(%rip),%rdi
mov    $0x14,%esi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeba(%rip),%rdi
mov    $0x1e,%esi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeb1(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
call   1040 <getchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [8 x i8] c"a = %d\0A\00"
@.str.1 = [8 x i8] c"b = %d\0A\00"
@.str.2 = [10 x i8] c"a+b = %d\0A\00"
@.str.3 = [25 x i8] c"\0APress any key to end...\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 10, i32* %1
store i32 20, i32* %2
%3 = load i32, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 %3)
%5 = load i32, i32* %2
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i32 %5)
%7 = load i32, i32* %1
%8 = load i32, i32* %2
%9 = add nsw i32 %7, %8
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i32 %9)
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0))
%12 = call i32 (...) @getchar()
ret i32 0
}

LLVM IR (-O2):
@.str = [8 x i8] c"a = %d\0A\00"
@.str.1 = [8 x i8] c"b = %d\0A\00"
@.str.2 = [10 x i8] c"a+b = %d\0A\00"
@.str.3 = [25 x i8] c"\0APress any key to end...\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 10)
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i32 20)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i32 30)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0))
%5 = tail call i32 (...) @getchar()
ret i32 0
}