int main() {
  int int_var = 5;
  int *int_ptr;
  int_ptr = &int_var;
  printf("int_ptr  = 0x%08x\n", int_ptr);
  printf("&int_ptr  = 0x%08x\n", &int_ptr);
  printf("*int_ptr  = 0x%08x\n\n", *int_ptr);
  printf("int_var is located at 0x%08x and contains %d\n", &int_var, int_var);
  printf("int_ptr is located at 0x%08x, contains 0x%08x, and points to %d\n\n",
         &int_ptr, int_ptr, *int_ptr);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x5,-0x4(%rbp)
lea    -0x4(%rbp),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rsi
lea    0xecf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec0(%rip),%rdi
lea    -0x10(%rbp),%rsi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%rax
mov    (%rax),%esi
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%edx
lea    0xec0(%rip),%rdi
lea    -0x4(%rbp),%rsi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%rdx
mov    -0x10(%rbp),%rax
mov    (%rax),%ecx
lea    0xed2(%rip),%rdi
lea    -0x10(%rbp),%rsi
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
sub    $0x18,%rsp
movl   $0x5,0xc(%rsp)
lea    0xc(%rsp),%rbx
mov    %rbx,0x10(%rsp)
lea    0xed1(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xebf(%rip),%rdi
lea    0x10(%rsp),%r14
mov    %r14,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0x10(%rsp),%rax
mov    (%rax),%esi
lea    0xeb6(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%edx
lea    0xeb9(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0x10(%rsp),%rdx
mov    (%rdx),%ecx
lea    0xecf(%rip),%rdi
mov    %r14,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [19 x i8] c"int_ptr = 0x%08x\0A\00"
@.str.1 = [20 x i8] c"&int_ptr = 0x%08x\0A\00"
@.str.2 = [21 x i8] c"*int_ptr = 0x%08x\0A\0A\00"
@.str.3 = [46 x i8] c"int_var is located at 0x%08x and contains %d\0A\00"
@.str.4 = [66 x i8] c"int_ptr is located at 0x%08x, contains 0x%08x, and points to %d\0A\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32*
store i32 5, i32* %1
store i32* %1, i32** %2
%3 = load i32*, i32** %2
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i32* %3)
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32** %2)
%6 = load i32*, i32** %2
%7 = load i32, i32* %6
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), i32 %7)
%9 = load i32, i32* %1
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([46 x i8], [46 x i8]* @.str.3, i64 0, i64 0), i32* %1, i32 %9)
%11 = load i32*, i32** %2
%12 = load i32*, i32** %2
%13 = load i32, i32* %12
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([66 x i8], [66 x i8]* @.str.4, i64 0, i64 0), i32** %2, i32* %11, i32 %13)
ret i32 0
}

LLVM IR (-O2):
@.str = [19 x i8] c"int_ptr = 0x%08x\0A\00"
@.str.1 = [20 x i8] c"&int_ptr = 0x%08x\0A\00"
@.str.2 = [21 x i8] c"*int_ptr = 0x%08x\0A\0A\00"
@.str.3 = [46 x i8] c"int_var is located at 0x%08x and contains %d\0A\00"
@.str.4 = [66 x i8] c"int_ptr is located at 0x%08x, contains 0x%08x, and points to %d\0A\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32*
%3 = bitcast i32* %1 to i8*
store i32 5, i32* %1
%4 = bitcast i32** %2 to i8*
store i32* %1, i32** %2
%5 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i32* %1)
%6 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32** %2)
%7 = load i32*, i32** %2
%8 = load i32, i32* %7
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), i32 %8)
%10 = load i32, i32* %1
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([46 x i8], [46 x i8]* @.str.3, i64 0, i64 0), i32* %1, i32 %10)
%12 = load i32*, i32** %2
%13 = load i32, i32* %12
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([66 x i8], [66 x i8]* @.str.4, i64 0, i64 0), i32** %2, i32* %12, i32 %13)
ret i32 0
}