From: Marek Olšák <[email protected]>
---
src/compiler/glsl/opt_dead_code_local.cpp | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/src/compiler/glsl/opt_dead_code_local.cpp
b/src/compiler/glsl/opt_dead_code_local.cpp
index fc979af..a403879 100644
--- a/src/compiler/glsl/opt_dead_code_local.cpp
+++ b/src/compiler/glsl/opt_dead_code_local.cpp
@@ -99,23 +99,26 @@ public:
}
virtual ir_visitor_status visit(ir_swizzle *ir)
{
ir_dereference_variable *deref = ir->val->as_dereference_variable();
if (!deref)
return visit_continue;
int used = 0;
used |= 1 << ir->mask.x;
- used |= 1 << ir->mask.y;
- used |= 1 << ir->mask.z;
- used |= 1 << ir->mask.w;
+ if (ir->mask.num_components > 1)
+ used |= 1 << ir->mask.y;
+ if (ir->mask.num_components > 2)
+ used |= 1 << ir->mask.z;
+ if (ir->mask.num_components > 3)
+ used |= 1 << ir->mask.w;
use_channels(deref->var, used);
return visit_continue_with_parent;
}
virtual ir_visitor_status visit_leave(ir_emit_vertex *)
{
/* For the purpose of dead code elimination, emitting a vertex counts as
* "reading" all of the currently assigned output variables.
--
2.7.4
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