Function MarkUsedSymbols

shadercompiler/ParserUtils.cpp:167–219

}

void MarkUsedSymbols( ASTNode* entryPoint, SymbolTable& symbols )
{
	if( entryPoint == nullptr )
	{
		return;
	}

	const InlineString globalsStructName = MakeInlineString( "GlobalsData" );

	if( entryPoint->GetNodeType() == NT_FUNCTION_ATTRIBUTE &&
		entryPoint->GetChildOrNull( 0 ) &&
		entryPoint->GetToken()->stringValue == MakeInlineString( "patchconstantfunc" ) &&
		entryPoint->GetChildOrNull( 0 )->GetToken()->type == OP_STRING_CONST )
	{
		Symbol* symbol = symbols.LookupGlobal( ParseString( entryPoint->GetChildOrNull( 0 )->GetToken()->stringValue ).c_str() );
		if( symbol && !symbol->used )
		{
			MarkUsedSymbols( symbol->definition, symbols );
		}
	}
	// "Globals" struct is a special case and we don't want to mark all of it's members
	// as "used" automatically.
	if( !( entryPoint->GetNodeType() == NT_STRUCT && entryPoint->GetSymbol()->name == globalsStructName ) && entryPoint->GetNodeType() != NT_SAMPLER_STATE_LIST )
	{
		for( size_t i = 0; i < entryPoint->GetChildrenCount(); ++i )
		{
			MarkUsedSymbols( entryPoint->GetChild( i ), symbols );
		}
	}
	if( entryPoint->GetSymbol() && entryPoint->GetSymbol()->used )
	{
		return;
	}
	if( entryPoint->GetSymbol() )
	{
		entryPoint->GetSymbol()->used = true;
	}
	if( entryPoint->GetSymbol() )
	{
		if( entryPoint->GetSymbol()->definition )
		{
			MarkUsedSymbols( entryPoint->GetSymbol()->definition, symbols );
		}
		if( entryPoint->GetSymbol()->type.symbol && entryPoint->GetSymbol()->type.symbol->definition )
		{
			MarkUsedSymbols( entryPoint->GetSymbol()->type.symbol->definition, symbols );
		}
	}
	if( entryPoint->GetType().symbol )
	{
		MarkUsedSymbols( entryPoint->GetType().symbol->definition, symbols );
	}
}

static bool HasUsedDeclarations( ASTNode* node )
{