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-rw-r--r--src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp b/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp
index d4da86b3b0..9b58916cf2 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_vector_splitting.cpp
@@ -271,12 +271,15 @@ ir_vector_splitting_visitor::visit_leave(ir_assignment *ir)
void *mem_ctx = lhs ? lhs->mem_ctx : rhs->mem_ctx;
unsigned int writemask;
+ if (!(ir->write_mask & (1 << i)))
+ continue;
+
if (lhs) {
new_lhs = new(mem_ctx) ir_dereference_variable(lhs->components[i]);
- writemask = (ir->write_mask >> i) & 1;
+ writemask = 1;
} else {
new_lhs = ir->lhs->clone(mem_ctx, NULL);
- writemask = ir->write_mask & (1 << i);
+ writemask = 1 << i;
}
if (rhs) {