[feat] COPYRESTARG: Improve support

Author: drizzle9

astgen.h

@@ -81,6 +81,7 @@ class AstGen : public compiler::Optimization, public compiler::GraphVisitor {
         panda::es2panda::ir::ScriptFunctionFlags flags_ {panda::es2panda::ir::ScriptFunctionFlags::NONE};
         auto funcNode = parser_program->Allocator()->New<panda::es2panda::ir::ScriptFunction>(nullptr, std::move(arguments), nullptr, body, nullptr, flags_, true, false);
 
+        this->scriptfunc = funcNode;
 
         (*this->method2scriptfunast_)[methodoffset] = funcNode;
 
@@ -925,6 +926,8 @@ class AstGen : public compiler::Optimization, public compiler::GraphVisitor {
 
     panda::es2panda::ir::Expression* suspendobj = nullptr;
 
+    panda::es2panda::ir::ScriptFunction* scriptfunc = nullptr;
+
 
     panda::es2panda::ir::BooleanLiteral* constant_true = AllocNode<panda::es2panda::ir::BooleanLiteral>(this, true);
     panda::es2panda::ir::BooleanLiteral* constant_false = AllocNode<panda::es2panda::ir::BooleanLiteral>(this, false);

astgen_ecma.inl

@@ -118,7 +118,15 @@ void panda::bytecodeopt::AstGen::VisitEcma(panda::compiler::GraphVisitor *visito
         case compiler::RuntimeInterface::IntrinsicId::COPYRESTARGS_IMM8:
         case compiler::RuntimeInterface::IntrinsicId::WIDE_COPYRESTARGS_PREF_IMM16:
        {
-            enc->HandleNewCreatedExpression(inst, enc->constant_restargs);
+            auto argi = static_cast<uint32_t>(inst->GetImms()[0]);
+            auto arg = enc->getParameterName(argi + 3); 
+            enc->HandleNewCreatedExpression(inst, arg);
+
+            auto& params = (*enc->method2scriptfunast_)[enc->methodoffset_]->Params();
+            params.pop_back();
+
+            params.push_back( AllocNode<es2panda::ir::SpreadElement>(enc, es2panda::ir::AstNodeType::SPREAD_ELEMENT, arg) );
+
             break;
         }