Add include OpCode

This adds an OpCode to emit when encontering a PHPCfg\Expr\Include_
in compile.

Support for it isn't included in the VM, JIT, or AOT, but at least
it allows bin/print.php to handle files that have an include
statement without throwing an exception while trying to generate the
OpCodes.

Fixes #62.

Author: driusan

lib/Compiler.php

@@ -496,6 +496,11 @@ protected function compileExpr(Op\Expr $expr, Block $block): array {
                     );
                 }
                 return $return;
+            case Op\Expr\Include_::class:
+                return [new OpCode(
+                     OpCode::TYPE_INCLUDE,
+		     $this->compileOperand($expr->expr, $block, true),
+		)];
         }
         throw new \LogicException("Unsupported expression: " . $expr->getType());
     }

lib/OpCode.php

@@ -65,6 +65,7 @@ class OpCode {
     const TYPE_INIT_ARRAY = 53;
     const TYPE_ADD_ARRAY_ELEMENT = 54;
     const TYPE_STATICCALL_INIT = 55;
+    const TYPE_INCLUDE = 56;
 
     public int $type;
     public ?int $arg1;
@@ -89,4 +90,4 @@ public function getType(): string {
         }
         return 'unknown opcode';
     }
-}
+}