#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 main(int argc, const char *argv[]) {
  int c = 1;
  if (argc < 2) {
    printf("%s: utilizzo\n%s nome...\n", argv[0], argv[0]);
    return -1;
  }
  printf("ciao");
  while (c < argc) {
    printf(" %s", argv[c]);
    ++c;
  }
  printf("!\n");
  return 0;
}


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)
movl   $0x1,-0x14(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    115f <main+0x4f>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xeb4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11b6 <main+0xa6>
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11a1 <main+0x91>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rsi
lea    0xe92(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    116d <main+0x5d>
lea    0xe7a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %rsi,%r15
cmp    $0x1,%edi
jg     114a <main+0x2a>
mov    (%r15),%rdx
lea    0xec7(%rip),%rdi
mov    %rdx,%rsi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xffffffff,%eax
jmp    1195 <main+0x75>
mov    %edi,%ebp
lea    0xec6(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %ebp,%ebp
mov    $0x1,%ebx
lea    0xeb6(%rip),%r14
nopl   0x0(%rax,%rax,1)
mov    (%r15,%rbx,8),%rsi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%rbp
jne    1170 <main+0x50>
lea    0xe94(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [25 x i8] c"%s: utilizzo\0A%s nome...\0A\00"
@.str.1 = [5 x i8] c"ciao\00"
@.str.2 = [4 x i8] c" %s\00"
@.str.3 = [3 x i8] c"!\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 1, i32* %6
%7 = load i32, i32* %4
%8 = icmp slt i32 %7, 2
br i1 %8, label %9, label %17
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 0
%15 = load i8*, i8** %14
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0), i8* %12, i8* %15)
store i32 -1, i32* %3
br label %34
17: ; preds = %2
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
br label %19
19: ; preds = %23, %17
%20 = load i32, i32* %6
%21 = load i32, i32* %4
%22 = icmp slt i32 %20, %21
br i1 %22, label %23, label %32
23: ; preds = %19
%24 = load i8**, i8*** %5
%25 = load i32, i32* %6
%26 = sext i32 %25 to i64
%27 = getelementptr inbounds i8*, i8** %24, i64 %26
%28 = load i8*, i8** %27
%29 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i8* %28)
%30 = load i32, i32* %6
%31 = add nsw i32 %30, 1
store i32 %31, i32* %6
br label %19
32: ; preds = %19
%33 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
store i32 0, i32* %3
br label %34
34: ; preds = %32, %9
%35 = load i32, i32* %3
ret i32 %35
}

LLVM IR (-O2):
@.str = [25 x i8] c"%s: utilizzo\0A%s nome...\0A\00"
@.str.1 = [5 x i8] c"ciao\00"
@.str.2 = [4 x i8] c" %s\00"
@str = [2 x i8] c"!\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %7
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0), i8* %5, i8* %5)
br label %19
7: ; preds = %2
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
%9 = zext i32 %0 to i64
br label %10
10: ; preds = %7, %10
%11 = phi i64 [ 1, %7 ], [ %15, %10 ]
%12 = getelementptr inbounds i8*, i8** %1, i64 %11
%13 = load i8*, i8** %12
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i8* %13)
%15 = add nuw nsw i64 %11, 1
%16 = icmp eq i64 %15, %9
br i1 %16, label %17, label %10
17: ; preds = %10
%18 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([2 x i8], [2 x i8]* @str, i64 0, i64 0))
br label %19
19: ; preds = %17, %4
%20 = phi i32 [ -1, %4 ], [ 0, %17 ]
ret i32 %20
}