#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);
int main() {
  int x = 1234;
  int *xp = &x;
  printf("x value:     %d\n", x);
  printf("x address:   %p\n", (void *)&x);
  printf("xp:          %p\n", (void *)xp);
  *xp = 4321;
  printf("x value:     %d\n", x);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x4d2,-0x8(%rbp)
lea    -0x8(%rbp),%rax
mov    %rax,-0x10(%rbp)
mov    -0x8(%rbp),%esi
lea    0xec8(%rip),%rdi
call   1030 <printf@plt>
lea    -0x8(%rbp),%rax
mov    %eax,%esi
lea    0xec7(%rip),%rdi
call   1030 <printf@plt>
mov    -0x10(%rbp),%rax
mov    %eax,%esi
lea    0xec6(%rip),%rdi
call   1030 <printf@plt>
mov    -0x10(%rbp),%rax
movl   $0x10e1,(%rax)
mov    -0x8(%rbp),%esi
lea    0xe8b(%rip),%rdi
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   $0x4d2,0x4(%rsp)
lea    0xedd(%rip),%r14
mov    %r14,%rdi
mov    $0x4d2,%esi
call   1030 <printf@plt>
lea    0x4(%rsp),%rbx
lea    0xed5(%rip),%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
lea    0xed8(%rip),%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
movl   $0x10e1,0x4(%rsp)
mov    %r14,%rdi
mov    $0x10e1,%esi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [17 x i8] c"x value: %d\0A\00"
@.str.1 = [17 x i8] c"x address: %p\0A\00"
@.str.2 = [17 x i8] c"xp: %p\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32*
store i32 0, i32* %1
store i32 1234, i32* %2
store i32* %2, i32** %3
%4 = load i32, i32* %2
%5 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i32 %4)
%6 = bitcast i32* %2 to i8*
%7 = ptrtoint i8* %6 to i32
%8 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i32 %7)
%9 = load i32*, i32** %3
%10 = bitcast i32* %9 to i8*
%11 = ptrtoint i8* %10 to i32
%12 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %11)
%13 = load i32*, i32** %3
store i32 4321, i32* %13
%14 = load i32, i32* %2
%15 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i32 %14)
ret i32 0
}

LLVM IR (-O2):
@.str = [17 x i8] c"x value: %d\0A\00"
@.str.1 = [17 x i8] c"x address: %p\0A\00"
@.str.2 = [17 x i8] c"xp: %p\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
store i32 1234, i32* %1
%3 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i32 1234)
%4 = ptrtoint i32* %1 to i64
%5 = trunc i64 %4 to i32
%6 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i32 %5)
%7 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %5)
store i32 4321, i32* %1
%8 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i32 4321)
ret i32 0
}