#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 x = 10;
  int *p;
  p = &x;
  *p = 20;
  x = 15;
  printf("Value of x: %d\n", x);
  printf("Value stored at location %p is %d\n", p, *p);
  printf("Address of x: %p\n", &x);
  printf("Address of x: %p\n", p);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0xa,-0x8(%rbp)
lea    -0x8(%rbp),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
movl   $0x14,(%rax)
movl   $0xf,-0x8(%rbp)
mov    -0x8(%rbp),%esi
lea    0xeb7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%rsi
mov    -0x10(%rbp),%rax
mov    (%rax),%edx
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec4(%rip),%rdi
lea    -0x8(%rbp),%rsi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%rsi
lea    0xeae(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
movl   $0xf,0x4(%rsp)
lea    0xedd(%rip),%rdi
mov    $0xf,%esi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeda(%rip),%rdi
lea    0x4(%rsp),%rbx
mov    %rbx,%rsi
mov    $0xf,%edx
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xee2(%rip),%r14
mov    %r14,%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [16 x i8] c"Value of x: %d\0A\00"
@.str.1 = [35 x i8] c"Value stored at location %p is %d\0A\00"
@.str.2 = [18 x i8] c"Address of x: %p\0A\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 = load i32*, i32** %3
store i32 20, i32* %4
store i32 15, i32* %2
%5 = load i32, i32* %2
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i32 %5)
%7 = load i32*, i32** %3
%8 = load i32*, i32** %3
%9 = load i32, i32* %8
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str.1, i64 0, i64 0), i32* %7, i32 %9)
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%12 = load i32*, i32** %3
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0), i32* %12)
ret i32 0
}

LLVM IR (-O2):
@.str = [16 x i8] c"Value of x: %d\0A\00"
@.str.1 = [35 x i8] c"Value stored at location %p is %d\0A\00"
@.str.2 = [18 x i8] c"Address of x: %p\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
store i32 15, i32* %1
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i32 15)
%4 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([35 x i8], [35 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32 15)
%5 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0), i32* %1)
%6 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0), i32* %1)
ret i32 0
}