Console Refactor

Engine/source/console/torquescript/optimizer.cpp

@@ -0,0 +1,103 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2013 GarageGames, LLC
+// Copyright (c) 2021 TGEMIT Authors & Contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#include "codeBlock.h"
+
+static bool isLiteralNumber(ExprNode* node)
+{
+   ExprNodeName name = node->getExprNodeNameEnum();
+   return name == NameFloatNode || name == NameIntNode;
+}
+
+static F64 getFloatValue(ExprNode* node)
+{
+   if (node->getExprNodeNameEnum() == NameFloatNode)
+      return static_cast<FloatNode*>(node)->value;
+   return (F64)static_cast<IntNode*>(node)->value;
+}
+
+static S32 getIntValue(ExprNode* node)
+{
+   if (node->getExprNodeNameEnum() == NameFloatNode)
+      return (S32)static_cast<FloatNode*>(node)->value;
+   return static_cast<IntNode*>(node)->value;
+}
+
+bool FloatBinaryExprNode::optimize()
+{
+   // Perform constant folding
+   if (isLiteralNumber(right) && isLiteralNumber(left))
+   {
+      F64 rightValue = getFloatValue(right);
+      F64 leftValue = getFloatValue(left);
+      F64 result = 0.0;
+
+      switch (op)
+      {
+      case '+':
+         result = leftValue + rightValue;
+         break;
+      case '-':
+         result = leftValue - rightValue;
+         break;
+      case '*':
+         result = leftValue * rightValue;
+         break;
+      case '/':
+         if (rightValue != 0.0)
+            result = leftValue / rightValue;
+         break;
+      }
+
+      optimizedNode = FloatNode::alloc(dbgLineNumber, result);
+      return true;
+   }
+
+   return false;
+}
+
+bool IntBinaryExprNode::optimize()
+{
+   if (op == '%' && left->getExprNodeNameEnum() == NameVarNode && isLiteralNumber(right))
+   {
+      // %a % intconst
+      S32 val = getIntValue(right);
+      switch (val)
+      {
+      case 2:
+         op = '&';
+         optimizedNode = IntNode::alloc(dbgLineNumber, 1);
+         return true;
+      case 4:
+         op = '&';
+         optimizedNode = IntNode::alloc(dbgLineNumber, 3);
+         return true;
+      case 8:
+         op = '&';
+         optimizedNode = IntNode::alloc(dbgLineNumber, 7);
+         return true;
+      }
+   }
+
+   return false;
+}