X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fglsl%2Foptimize.cpp;h=1e974c9f01f8eee6d3eea5faabc00b20759ffd37;hp=0d6f753768ad2bd5fdbf7ff4d3a8f44ff75f1cb9;hb=209fc09bcf2947ca60ddf15b8903d0c3194c7d5d;hpb=57ff0b07aca38aee593a85831ba600b77e3b7a7b

diff --git a/source/glsl/optimize.cpp b/source/glsl/optimize.cpp
index 0d6f7537..1e974c9f 100644
--- a/source/glsl/optimize.cpp
+++ b/source/glsl/optimize.cpp
@@ -1260,23 +1260,15 @@ bool UnusedVariableRemover::apply(Stage &s)
 
 	for(const auto &kvp: variables)
 	{
-		if(kvp.second.output)
+		if(!kvp.second.referenced)
+			unused_nodes.insert(kvp.first);
+		else if(kvp.second.output)
 		{
 			/* The last visible assignments of output variables are used by the
 			next stage or the API. */
 			for(AssignmentInfo *a: kvp.second.assignments)
 				unused_nodes.erase(a->node);
 		}
-
-		if(!kvp.second.output && !kvp.second.referenced)
-		{
-			// Don't remove variables from inside interface blocks.
-			if(!kvp.second.interface_block)
-				unused_nodes.insert(kvp.first);
-		}
-		else if(kvp.second.interface_block)
-			// Interface blocks are kept if even one member is used.
-			unused_nodes.erase(kvp.second.interface_block);
 	}
 
 	NodeRemover().apply(s, unused_nodes);
@@ -1493,14 +1485,14 @@ void UnusedVariableRemover::visit(VariableDeclaration &var)
 		return;
 
 	VariableInfo &var_info = variables[&var];
-	var_info.interface_block = interface_block;
 
 	/* Mark variables as output if they're used by the next stage or the
 	graphics API. */
-	if(interface_block)
-		var_info.output = (interface_block->interface=="out" && (interface_block->linked_block || !interface_block->block_name.compare(0, 3, "gl_")));
-	else
-		var_info.output = (var.interface=="out" && (stage->type==Stage::FRAGMENT || var.linked_declaration || !var.name.compare(0, 3, "gl_")));
+	var_info.output = (var.interface=="out" && (stage->type==Stage::FRAGMENT || var.linked_declaration || !var.name.compare(0, 3, "gl_")));
+
+	// Linked outputs are automatically referenced.
+	if(var_info.output && var.linked_declaration)
+		var_info.referenced = true;
 
 	if(var.init_expression)
 	{