Fixed codegeneration for ISSET_ISEMPTY_DIM

Fixes oss-fuzz #63805

Author: dstogov

ext/opcache/jit/zend_jit_ir.c

@@ -11893,6 +11893,10 @@ static int zend_jit_fetch_dimension_address_inner(zend_jit_ctx  *jit,
 	}
 
 	if (type == BP_JIT_IS
+	 && !(op2_info & (MAY_BE_ANY|MAY_BE_UNDEF))) {
+	 	/* dead code */
+		ir_END_list(*end_inputs);
+	} else if (type == BP_JIT_IS
 	 && (op1_info & MAY_BE_ARRAY)
 	 && (op2_info & (MAY_BE_LONG|MAY_BE_STRING))
 	 && test_zval_inputs->count) {

ext/opcache/tests/jit/isset_002.phpt

@@ -0,0 +1,33 @@
+--TEST--
+ISSET_ISEMPTY_DIM with undefined variable
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.file_update_protection=0
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+function foo() {
+    foreach ($how as $key => $value) {
+        if (is_int($key)) {
+            if (is_int($key)) {
+                $keyy++;
+            }
+            if (isset($row[$key])) {
+                return false;
+            }
+        }
+        if (isset($row[$key])) {
+            return false;
+        }
+    }
+    return true;
+}
+foo();
+?>
+DONE
+--EXPECTF--
+Warning: Undefined variable $how in %sisset_002.php on line 3
+
+Warning: foreach() argument must be of type array|object, null given in %sisset_002.php on line 3
+DONE