#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, char *argv[]) {
  printf("-> Hello World!\n");
  if (argc < 2) {
    printf("-> There's no arguments!\n");
    return 0;
  }
  printf("-> Args: %s\n", argv[1]);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
cmpl   $0x2,-0x8(%rbp)
jge    1158 <main+0x48>
lea    0xecc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
jmp    1175 <main+0x65>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rsi
lea    0xec4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
mov    %rsi,%rbx
mov    %edi,%ebp
lea    0xede(%rip),%rdi
call   1030 <puts@plt>
cmp    $0x1,%ebp
jg     1147 <main+0x27>
lea    0xedd(%rip),%rdi
call   1030 <puts@plt>
jmp    1159 <main+0x39>
mov    0x8(%rbx),%rsi
lea    0xeae(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [17 x i8] c"-> Hello World!\0A\00"
@.str.1 = [26 x i8] c"-> There's no arguments!\0A\00"
@.str.2 = [13 x i8] c"-> Args: %s\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%7 = load i32, i32* %4
%8 = icmp slt i32 %7, 2
br i1 %8, label %9, label %11
9: ; preds = %2
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.1, i64 0, i64 0))
store i32 0, i32* %3
br label %16
11: ; preds = %2
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 1
%14 = load i8*, i8** %13
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), i8* %14)
store i32 0, i32* %3
br label %16
16: ; preds = %11, %9
%17 = load i32, i32* %3
ret i32 %17
}

LLVM IR (-O2):
@.str.2 = [13 x i8] c"-> Args: %s\0A\00"
@str = [16 x i8] c"-> Hello World!\00"
@str.3 = [25 x i8] c"-> There's no arguments!\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @str, i64 0, i64 0))
%4 = icmp slt i32 %0, 2
br i1 %4, label %5, label %7
5: ; preds = %2
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @str.3, i64 0, i64 0))
br label %11
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), i8* %9)
br label %11
11: ; preds = %7, %5
ret i32 0
}