#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 *);
void msg(void) {
  printf("this program is meant to be a reference on pointer usage,\n");
  printf("two versions of the same execution code are written\n");
  printf("and both work in exactly the same way\n");
  printf("one that uses the array-name[element-index] syntax\n");
  printf("and another that uses the * dereference operator\n");
}


x86 assembly (clang, -O0):
<msg>:
push   %rbp
mov    %rsp,%rbp
lea    0xee5(%rip),%rdi
call   1030 <printf@plt>
lea    0xf14(%rip),%rdi
call   1030 <printf@plt>
lea    0xf3d(%rip),%rdi
call   1030 <printf@plt>
lea    0xf58(%rip),%rdi
call   1030 <printf@plt>
lea    0xf80(%rip),%rdi
call   1030 <printf@plt>
pop    %rbp
ret

x86 assembly (clang, -O2):
<msg>:
push   %rax
lea    0xee8(%rip),%rdi
call   1030 <puts@plt>
lea    0xf16(%rip),%rdi
call   1030 <puts@plt>
lea    0xf3e(%rip),%rdi
call   1030 <puts@plt>
lea    0xf58(%rip),%rdi
call   1030 <puts@plt>
lea    0xf7f(%rip),%rdi
pop    %rax
jmp    1030 <puts@plt>

LLVM IR (-O0):
@.str = [59 x i8] c"this program is meant to be a reference on pointer usage,\0A\00"
@.str.1 = [53 x i8] c"two versions of the same execution code are written\0A\00"
@.str.2 = [39 x i8] c"and both work in exactly the same way\0A\00"
@.str.3 = [52 x i8] c"one that uses the array-name[element-index] syntax\0A\00"
@.str.4 = [50 x i8] c"and another that uses the * dereference operator\0A\00"
define void @msg() {
%1 = call i32 @printf(i8* getelementptr inbounds ([59 x i8], [59 x i8]* @.str, i64 0, i64 0))
%2 = call i32 @printf(i8* getelementptr inbounds ([53 x i8], [53 x i8]* @.str.1, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([52 x i8], [52 x i8]* @.str.3, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([50 x i8], [50 x i8]* @.str.4, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@str = [58 x i8] c"this program is meant to be a reference on pointer usage,\00"
@str.5 = [52 x i8] c"two versions of the same execution code are written\00"
@str.6 = [38 x i8] c"and both work in exactly the same way\00"
@str.7 = [51 x i8] c"one that uses the array-name[element-index] syntax\00"
@str.8 = [49 x i8] c"and another that uses the * dereference operator\00"
define void @msg() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([58 x i8], [58 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([52 x i8], [52 x i8]* @str.5, i64 0, i64 0))
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([38 x i8], [38 x i8]* @str.6, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([51 x i8], [51 x i8]* @str.7, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([49 x i8], [49 x i8]* @str.8, i64 0, i64 0))
ret void
}