Convert CONCAT into FAST_CONCAT for non-object operands

php · Jul 19, 2017 · 3185f86 · 3185f86
1 parent 95a1f77
commit 3185f86
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/ext/opcache/Optimizer/dfa_pass.c b/ext/opcache/Optimizer/dfa_pass.c
@@ -649,6 +649,11 @@ void zend_dfa_optimize_op_array(zend_op_array *op_array, zend_optimizer_ctx *ctx
 						ZVAL_DOUBLE(&tmp, zval_get_double(zv));
 						opline->op2.constant = zend_optimizer_add_literal(op_array, &tmp);
 					}
+				} else if (opline->opcode == ZEND_CONCAT) {
+					if (!(OP1_INFO() & MAY_BE_OBJECT)
+					 && !(OP2_INFO() & MAY_BE_OBJECT)) {
+						opline->opcode = ZEND_FAST_CONCAT;
+					}
 				}
 			}