#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 /*<<< orphan*/ scanf(char *, int *);
int /*<<< orphan*/ system(char *);
int main(int argc, char *argv[]) {
  int N1;
  int N2;
  int N3;
  int Max;
  printf("\n inserisci il primo numero\n");
  printf("\n inserisci il secondo numero\n");
  printf("\n inserisci il terzo numero\n");
  scanf("%d", &N1);
  scanf("%d", &N2);
  scanf("%d", &N3);
  if (N1 > N2) {
    Max = N1;
  } else {
    Max = N2;
  }
  if (N3 > Max) {
    Max = N3;
  }
  printf("\n il numero maggiore e':  %d", Max);
  system("PAUSE");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xec2(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xefc(%rip),%rdi
lea    -0x14(%rbp),%rsi
call   1050 <scanf@plt>
lea    0xeec(%rip),%rdi
lea    -0x18(%rbp),%rsi
call   1050 <scanf@plt>
lea    0xedc(%rip),%rdi
lea    -0x1c(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x14(%rbp),%eax
cmp    -0x18(%rbp),%eax
jle    11b7 <main+0x87>
mov    -0x14(%rbp),%eax
mov    %eax,-0x20(%rbp)
jmp    11bd <main+0x8d>
mov    -0x18(%rbp),%eax
mov    %eax,-0x20(%rbp)
mov    -0x1c(%rbp),%eax
cmp    -0x20(%rbp),%eax
jle    11cf <main+0x9f>
mov    -0x1c(%rbp),%eax
mov    %eax,-0x20(%rbp)
mov    -0x20(%rbp),%esi
lea    0xe80(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe8f(%rip),%rdi
call   1030 <system@plt>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xed7(%rip),%rdi
call   1030 <puts@plt>
lea    0xee7(%rip),%rdi
call   1030 <puts@plt>
lea    0xef9(%rip),%rdi
call   1030 <puts@plt>
lea    0xeaa(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0x4(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
mov    0xc(%rsp),%eax
mov    0x8(%rsp),%esi
cmp    %esi,%eax
cmovg  %eax,%esi
mov    0x4(%rsp),%eax
cmp    %esi,%eax
cmovg  %eax,%esi
lea    0xe4c(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xe5b(%rip),%rdi
call   1040 <system@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [29 x i8] c"\0A inserisci il primo numero\0A\00"
@.str.1 = [31 x i8] c"\0A inserisci il secondo numero\0A\00"
@.str.2 = [29 x i8] c"\0A inserisci il terzo numero\0A\00"
@.str.3 = [3 x i8] c"%d\00"
@.str.4 = [29 x i8] c"\0A il numero maggiore e': %d\00"
@.str.5 = [6 x i8] c"PAUSE\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
%9 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0))
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.1, i64 0, i64 0))
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0))
%13 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %6)
%14 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %7)
%15 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %8)
%16 = load i32, i32* %6
%17 = load i32, i32* %7
%18 = icmp sgt i32 %16, %17
br i1 %18, label %19, label %21
19: ; preds = %2
%20 = load i32, i32* %6
store i32 %20, i32* %9
br label %23
21: ; preds = %2
%22 = load i32, i32* %7
store i32 %22, i32* %9
br label %23
23: ; preds = %21, %19
%24 = load i32, i32* %8
%25 = load i32, i32* %9
%26 = icmp sgt i32 %24, %25
br i1 %26, label %27, label %29
27: ; preds = %23
%28 = load i32, i32* %8
store i32 %28, i32* %9
br label %29
29: ; preds = %27, %23
%30 = load i32, i32* %9
%31 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.4, i64 0, i64 0), i32 %30)
%32 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0))
%33 = load i32, i32* %3
ret i32 %33
}

LLVM IR (-O2):
@.str.3 = [3 x i8] c"%d\00"
@.str.4 = [29 x i8] c"\0A il numero maggiore e': %d\00"
@.str.5 = [6 x i8] c"PAUSE\00"
@str = [28 x i8] c"\0A inserisci il primo numero\00"
@str.6 = [30 x i8] c"\0A inserisci il secondo numero\00"
@str.7 = [28 x i8] c"\0A inserisci il terzo numero\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
%6 = bitcast i32* %3 to i8*
%7 = bitcast i32* %4 to i8*
%8 = bitcast i32* %5 to i8*
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @str, i64 0, i64 0))
%10 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str.6, i64 0, i64 0))
%11 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @str.7, i64 0, i64 0))
%12 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %3)
%13 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %4)
%14 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i32* %5)
%15 = load i32, i32* %3
%16 = load i32, i32* %4
%17 = icmp sgt i32 %15, %16
%18 = select i1 %17, i32 %15, i32 %16
%19 = load i32, i32* %5
%20 = icmp sgt i32 %19, %18
%21 = select i1 %20, i32 %19, i32 %18
%22 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str.4, i64 0, i64 0), i32 %21)
%23 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0))
ret i32 0
}