tcg: properly check that op's output needs to be synced to memory

Fix typo introduced in b3a1be87bac3a6aaa59bb88c1410f170dc9b22d5.

Reported-by: Ruslan Savchenko <ruslan.savchenko@gmail.com>
Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

tcg/tcg.c

diff --git a/tcg/tcg.c b/tcg/tcg.c
index 42052db..35fba50 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1337,8 +1337,8 @@
                the low part.  The result can be optimized to a simple
                add or sub.  This happens often for x86_64 guest when the
                cpu mode is set to 32 bit.  */
-            if (dead_temps[args[1]] && !mem_temps[1]) {
-                if (dead_temps[args[0]] && !mem_temps[0]) {
+            if (dead_temps[args[1]] && !mem_temps[args[1]]) {
+                if (dead_temps[args[0]] && !mem_temps[args[0]]) {
                     goto do_remove;
                 }
                 /* Create the single operation plus nop.  */
@@ -1363,8 +1363,8 @@
             nb_iargs = 2;
             nb_oargs = 2;
             /* Likewise, test for the high part of the operation dead.  */
-            if (dead_temps[args[1]] && !mem_temps[1]) {
-                if (dead_temps[args[0]] && !mem_temps[0]) {
+            if (dead_temps[args[1]] && !mem_temps[args[1]]) {
+                if (dead_temps[args[0]] && !mem_temps[args[0]]) {
                     goto do_remove;
                 }
                 gen_opc_buf[op_index] = op = INDEX_op_mul_i32;