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-rw-r--r--src/panfrost/midgard/midgard_ra.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/panfrost/midgard/midgard_ra.c b/src/panfrost/midgard/midgard_ra.c
index 6049efc3f8f..c545bed5e17 100644
--- a/src/panfrost/midgard/midgard_ra.c
+++ b/src/panfrost/midgard/midgard_ra.c
@@ -835,9 +835,17 @@ mir_spill_register(
midgard_instruction st;
+ /* Note: it's important to match the mask of the spill
+ * with the mask of the instruction whose destination
+ * we're spilling, or otherwise we'll read invalid
+ * components and can fail RA in a subsequent iteration
+ */
+
if (is_special_w) {
st = v_mov(spill_node, spill_slot);
st.no_spill |= (1 << spill_class);
+ st.mask = ins->mask;
+ st.dest_type = st.src_types[0] = ins->dest_type;
} else {
ins->dest = spill_index++;
ins->no_spill |= (1 << spill_class);