Commit f3dddebddd for aom

commit f3dddebddd0dba76fbfb97b96b6336bcf1d3a30c
Author: Wan-Teh Chang <wtc@google.com>
Date:   Thu Mar 19 20:48:01 2026 -0700

    Fix conditional jump based on uninitialised value

    Update an if condition added in
    commit 4265e4aa4b4ee9de380f3f8a82c74438cd5f2acf, which causes the
    valgrind error "Conditional jump or move depends on uninitialised
    value(s)" in some tests.

    Note that the struct that rd_stats_y points to is still uninitialized,
    but we won't be using its uninitialized members in an if condition.

    Bug: 494653438
    Change-Id: I7f8aa8687417e9f179a2ec16552cc3323d493c47

diff --git a/av1/encoder/rdopt.c b/av1/encoder/rdopt.c
index 60d088c2b6..74a25dfa73 100644
--- a/av1/encoder/rdopt.c
+++ b/av1/encoder/rdopt.c
@@ -1880,7 +1880,9 @@ static int64_t motion_mode_rd(
       adjust_cost(cpi, x, &this_yrd, /*is_inter_pred=*/true);
     }
     adjust_rdcost(cpi, x, rd_stats, /*is_inter_pred=*/true);
-    if (rd_stats_y->rdcost < INT64_MAX) {
+    // Bug 494653438: If do_tx_search is 0, rd_stats_y is uninitialized, so
+    // valgrind will warn if we use rd_stats_y->rdcost in a conditional.
+    if (!do_tx_search || rd_stats_y->rdcost < INT64_MAX) {
       adjust_rdcost(cpi, x, rd_stats_y, /*is_inter_pred=*/true);
     }