1 files changed, 4 insertions, 1 deletions

diff --git a/src/lj_opt_mem.c b/src/lj_opt_mem.c
index 81184f14..d6a419e4 100644
--- a/src/lj_opt_mem.c
+++ b/src/lj_opt_mem.c
@@ -364,7 +364,10 @@ TRef LJ_FASTCALL lj_opt_dse_ahstore(jit_State *J)
       /* Different value: try to eliminate the redundant store. */
       if (ref > J->chain[IR_LOOP]) {  /* Quick check to avoid crossing LOOP. */
         IRIns *ir;
-        /* Check for any intervening guards (includes conflicting loads). */
+        /* Check for any intervening guards (includes conflicting loads).
+        ** Note that lj_tab_keyindex and lj_vm_next don't need guards,
+        ** since they are followed by at least one guarded VLOAD.
+        */
         for (ir = IR(J->cur.nins-1); ir > store; ir--)
           if (irt_isguard(ir->t) || ir->o == IR_ALEN)
             goto doemit;  /* No elimination possible. */