1 files changed, 56 insertions, 22 deletions

diff --git a/tcg/tcg.c b/tcg/tcg.c
index 97558ec..1aa6cb4 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2982,34 +2982,68 @@ static bool liveness_pass_2(TCGContext *s)
         }
 
         /* Outputs become available.  */
-        for (i = 0; i < nb_oargs; i++) {
-            arg_ts = arg_temp(op->args[i]);
+        if (opc == INDEX_op_mov_i32 || opc == INDEX_op_mov_i64) {
+            arg_ts = arg_temp(op->args[0]);
             dir_ts = arg_ts->state_ptr;
-            if (!dir_ts) {
-                continue;
+            if (dir_ts) {
+                op->args[0] = temp_arg(dir_ts);
+                changes = true;
+
+                /* The output is now live and modified.  */
+                arg_ts->state = 0;
+
+                if (NEED_SYNC_ARG(0)) {
+                    TCGOpcode sopc = (arg_ts->type == TCG_TYPE_I32
+                                      ? INDEX_op_st_i32
+                                      : INDEX_op_st_i64);
+                    TCGOp *sop = tcg_op_insert_after(s, op, sopc);
+                    TCGTemp *out_ts = dir_ts;
+
+                    if (IS_DEAD_ARG(0)) {
+                        out_ts = arg_temp(op->args[1]);
+                        arg_ts->state = TS_DEAD;
+                        tcg_op_remove(s, op);
+                    } else {
+                        arg_ts->state = TS_MEM;
+                    }
+
+                    sop->args[0] = temp_arg(out_ts);
+                    sop->args[1] = temp_arg(arg_ts->mem_base);
+                    sop->args[2] = arg_ts->mem_offset;
+                } else {
+                    tcg_debug_assert(!IS_DEAD_ARG(0));
+                }
             }
-            op->args[i] = temp_arg(dir_ts);
-            changes = true;
+        } else {
+            for (i = 0; i < nb_oargs; i++) {
+                arg_ts = arg_temp(op->args[i]);
+                dir_ts = arg_ts->state_ptr;
+                if (!dir_ts) {
+                    continue;
+                }
+                op->args[i] = temp_arg(dir_ts);
+                changes = true;
 
-            /* The output is now live and modified.  */
-            arg_ts->state = 0;
+                /* The output is now live and modified.  */
+                arg_ts->state = 0;
 
-            /* Sync outputs upon their last write.  */
-            if (NEED_SYNC_ARG(i)) {
-                TCGOpcode sopc = (arg_ts->type == TCG_TYPE_I32
-                                  ? INDEX_op_st_i32
-                                  : INDEX_op_st_i64);
-                TCGOp *sop = tcg_op_insert_after(s, op, sopc);
+                /* Sync outputs upon their last write.  */
+                if (NEED_SYNC_ARG(i)) {
+                    TCGOpcode sopc = (arg_ts->type == TCG_TYPE_I32
+                                      ? INDEX_op_st_i32
+                                      : INDEX_op_st_i64);
+                    TCGOp *sop = tcg_op_insert_after(s, op, sopc);
 
-                sop->args[0] = temp_arg(dir_ts);
-                sop->args[1] = temp_arg(arg_ts->mem_base);
-                sop->args[2] = arg_ts->mem_offset;
+                    sop->args[0] = temp_arg(dir_ts);
+                    sop->args[1] = temp_arg(arg_ts->mem_base);
+                    sop->args[2] = arg_ts->mem_offset;
 
-                arg_ts->state = TS_MEM;
-            }
-            /* Drop outputs that are dead.  */
-            if (IS_DEAD_ARG(i)) {
-                arg_ts->state = TS_DEAD;
+                    arg_ts->state = TS_MEM;
+                }
+                /* Drop outputs that are dead.  */
+                if (IS_DEAD_ARG(i)) {
+                    arg_ts->state = TS_DEAD;
+                }
             }
         }
     }