SkSL performance improvements

src/sksl/SkSLCompiler.cpp

Index: src/sksl/SkSLCompiler.cpp
diff --git a/src/sksl/SkSLCompiler.cpp b/src/sksl/SkSLCompiler.cpp
index 2b4adc1026307053f38fae0480708607ad7c4f46..6c6cef4577a7b1586ba6133c080f2b5a7e0cf388 100644
--- a/src/sksl/SkSLCompiler.cpp
+++ b/src/sksl/SkSLCompiler.cpp
@@ -43,7 +43,7 @@ Compiler::Compiler()
     auto symbols = std::shared_ptr<SymbolTable>(new SymbolTable(types, *this));
     fIRGenerator = new IRGenerator(symbols, *this);
     fTypes = types;
-    #define ADD_TYPE(t) types->add(k ## t ## _Type->fName, k ## t ## _Type)
+    #define ADD_TYPE(t) types->addWithoutOwnership(k ## t ## _Type.fName, &k ## t ## _Type)
     ADD_TYPE(Void);
     ADD_TYPE(Float);
     ADD_TYPE(Vec2);
@@ -184,20 +184,22 @@ void Compiler::internalConvertProgram(std::string text,
 std::unique_ptr<Program> Compiler::convertProgram(Program::Kind kind, std::string text) {
     fErrorText = "";
     fErrorCount = 0;
-    fIRGenerator->pushSymbolTable();
-    std::vector<std::unique_ptr<ProgramElement>> result;
+    fIRGenerator->pushSymbolTable(true);
+    std::vector<std::unique_ptr<ProgramElement>> elements;
     switch (kind) {
         case Program::kVertex_Kind:
-            this->internalConvertProgram(SKSL_VERT_INCLUDE, &result);
+            this->internalConvertProgram(SKSL_VERT_INCLUDE, &elements);
             break;
         case Program::kFragment_Kind:
-            this->internalConvertProgram(SKSL_FRAG_INCLUDE, &result);
+            this->internalConvertProgram(SKSL_FRAG_INCLUDE, &elements);
             break;
     }
-    this->internalConvertProgram(text, &result);
+    this->internalConvertProgram(text, &elements);
+    auto result = std::unique_ptr<Program>(new Program(kind, std::move(elements), 
+                                                       fIRGenerator->fSymbolTable));;
     fIRGenerator->popSymbolTable();
     this->writeErrorCount();
-    return std::unique_ptr<Program>(new Program(kind, std::move(result)));;
+    return result;
 }
 
 void Compiler::error(Position position, std::string msg) {