ARM64: Fix IR_HREF code generation.

src/lj_asm_arm64.h

@@ -791,7 +791,7 @@ static void asm_href(ASMState *as, IRIns *ir, IROp merge)
     }
   } else if (irt_isaddr(kt)) {
     if (isk) {
-      int64_t kk = ((int64_t)irt_toitype(irkey->t) << 47) | irkey[1].tv.u64;
+      int64_t kk = ((int64_t)irt_toitype(kt) << 47) | irkey[1].tv.u64;
       scr = ra_allock(as, kk, allow);
     } else {
       scr = ra_scratch(as, allow);
@@ -799,7 +799,7 @@ static void asm_href(ASMState *as, IRIns *ir, IROp merge)
     rset_clear(allow, scr);
   } else {
     lj_assertA(irt_ispri(kt) && !irt_isnil(kt), "bad HREF key type");
-    type = ra_allock(as, ~((int64_t)~irt_toitype(ir->t) << 47), allow);
+    type = ra_allock(as, ~((int64_t)~irt_toitype(kt) << 47), allow);
     scr = ra_scratch(as, rset_clear(allow, type));
     rset_clear(allow, scr);
   }
@@ -848,7 +848,7 @@ static void asm_href(ASMState *as, IRIns *ir, IROp merge)
       emit_lso(as, A64I_LDRx, scr, dest, offsetof(Node, key.u64));
     }
   } else {
-    emit_nm(as, A64I_CMPw, scr, type);
+    emit_nm(as, A64I_CMPx, scr, type);
     emit_lso(as, A64I_LDRx, scr, dest, offsetof(Node, key));
   }