Mesa (master): glsl: Skip processing of expression trees in discard simplification.
Eric Anholt
anholt at kemper.freedesktop.org
Tue Mar 15 17:23:03 UTC 2011
Module: Mesa
Branch: master
Commit: 2b13e135942ea7ebe1426a1809bf0efb7891387d
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=2b13e135942ea7ebe1426a1809bf0efb7891387d
Author: Eric Anholt <eric at anholt.net>
Date: Fri Mar 11 13:23:13 2011 -0800
glsl: Skip processing of expression trees in discard simplification.
It only cares about "if", "loop", and "discard".
---
src/glsl/opt_discard_simplification.cpp | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/src/glsl/opt_discard_simplification.cpp b/src/glsl/opt_discard_simplification.cpp
index 0e577c4..7c2928d 100644
--- a/src/glsl/opt_discard_simplification.cpp
+++ b/src/glsl/opt_discard_simplification.cpp
@@ -95,6 +95,7 @@ public:
ir_visitor_status visit_enter(ir_if *);
ir_visitor_status visit_enter(ir_loop *);
+ ir_visitor_status visit_enter(ir_assignment *);
bool progress;
};
@@ -117,6 +118,15 @@ is_only_instruction(ir_discard *discard)
discard->next->is_tail_sentinel());
}
+/* We only care about the top level instructions, so don't descend
+ * into expressions.
+ */
+ir_visitor_status
+discard_simplifier::visit_enter(ir_assignment *ir)
+{
+ return visit_continue_with_parent;
+}
+
ir_visitor_status
discard_simplifier::visit_enter(ir_if *ir)
{
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