#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 abs(int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ puts(char *);
int /*<<< orphan*/ scanf(char *, int *);
int somma(int);
int main() {
  int x;
  puts("Somma ricorsiva delle cifre di un numero intero");
  printf("> ");
  scanf("%d", &x);
  x = abs(x);
  printf("La somma delle cifre di %d e' %d\n", x, somma(x));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe9a(%rip),%rdi
call   1030 <puts@plt>
lea    0xebe(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
lea    0xeb3(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1060 <scanf@plt>
mov    -0x8(%rbp),%edi
call   1040 <abs@plt>
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%edi
call   1070 <somma@plt>
mov    -0xc(%rbp),%esi
mov    %eax,%edx
lea    0xe88(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xeb4(%rip),%rdi
call   1030 <puts@plt>
lea    0xed8(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xecd(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1050 <scanf@plt>
mov    0xc(%rsp),%eax
mov    %eax,%ebx
neg    %ebx
cmovs  %eax,%ebx
mov    %ebx,0xc(%rsp)
mov    %ebx,%edi
call   1060 <somma@plt>
lea    0xea9(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [48 x i8] c"Somma ricorsiva delle cifre di un numero intero\00"
@.str.1 = [3 x i8] c"> \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [34 x i8] c"La somma delle cifre di %d e' %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @puts(i8* getelementptr inbounds ([48 x i8], [48 x i8]* @.str, i64 0, i64 0))
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%6 = load i32, i32* %2
%7 = call i32 @abs(i32 %6)
store i32 %7, i32* %2
%8 = load i32, i32* %2
%9 = load i32, i32* %2
%10 = call i32 @somma(i32 %9)
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.3, i64 0, i64 0), i32 %8, i32 %10)
ret i32 0
}

LLVM IR (-O2):
@.str = [48 x i8] c"Somma ricorsiva delle cifre di un numero intero\00"
@.str.1 = [3 x i8] c"> \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [34 x i8] c"La somma delle cifre di %d e' %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([48 x i8], [48 x i8]* @.str, i64 0, i64 0))
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %1)
%6 = load i32, i32* %1
%7 = call i32 @llvm.abs.i32(i32 %6, i1 true)
store i32 %7, i32* %1
%8 = call i32 @somma(i32 %7)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @.str.3, i64 0, i64 0), i32 %7, i32 %8)
ret i32 0
}