#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("%s #args: %d\n", argv[0], argc);
  if (argv[1])
    printf("Hello, %s!\n", argv[1]);
  else
    printf("Hello, World!\n");
  printf("Terminating...\n");
  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)
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
mov    -0x8(%rbp),%edx
lea    0xec9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%rax
cmpq   $0x0,0x8(%rax)
je     1168 <main+0x58>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rsi
lea    0xeb2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1176 <main+0x66>
lea    0xeab(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeac(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
mov    %rsi,%rbx
mov    %edi,%edx
mov    (%rsi),%rsi
lea    0xed0(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x8(%rbx),%rsi
test   %rsi,%rsi
je     1150 <main+0x30>
lea    0xec7(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
jmp    115c <main+0x3c>
lea    0xec3(%rip),%rdi
call   1030 <puts@plt>
lea    0xec5(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [14 x i8] c"%s #args: %d\0A\00"
@.str.1 = [12 x i8] c"Hello, %s!\0A\00"
@.str.2 = [15 x i8] c"Hello, World!\0A\00"
@.str.3 = [16 x i8] c"Terminating...\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 = load i8**, i8*** %5
%7 = getelementptr inbounds i8*, i8** %6, i64 0
%8 = load i8*, i8** %7
%9 = load i32, i32* %4
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i8* %8, i32 %9)
%11 = load i8**, i8*** %5
%12 = getelementptr inbounds i8*, i8** %11, i64 1
%13 = load i8*, i8** %12
%14 = icmp ne i8* %13, null
br i1 %14, label %15, label %20
15: ; preds = %2
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 1
%18 = load i8*, i8** %17
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i8* %18)
br label %22
20: ; preds = %2
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0))
br label %22
22: ; preds = %20, %15
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [14 x i8] c"%s #args: %d\0A\00"
@.str.1 = [12 x i8] c"Hello, %s!\0A\00"
@str = [14 x i8] c"Hello, World!\00"
@str.4 = [15 x i8] c"Terminating...\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = load i8*, i8** %1
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i8* %3, i32 %0)
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
%7 = icmp eq i8* %6, null
br i1 %7, label %10, label %8
8: ; preds = %2
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i8* %6)
br label %12
10: ; preds = %2
%11 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @str, i64 0, i64 0))
br label %12
12: ; preds = %10, %8
%13 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @str.4, i64 0, i64 0))
ret i32 0
}