UB

Author: arnaud-lb

Zend/Optimizer/dfa_pass.c

@@ -482,7 +482,7 @@ static uint32_t zend_dfa_optimize_calls(zend_op_array *op_array, zend_ssa *ssa)
 							/* Const exprs can evaluate to non-const zvals (e.g. objects), and are not idempotent */
 							continue;
 						}
-						const_args |= (1 << i);
+						const_args |= (UINT32_C(1) << i);
 					}
 				}
 

Zend/zend_compile.c

@@ -4162,6 +4162,8 @@ static void zend_compile_call_partial(znode *result, zend_ast_fcc *fcc_ast, uint
 	if (!Z_ISUNDEF_P(named_positions)) {
 		opline->op2.constant = zend_add_literal(named_positions);
 		opline->op2_type = IS_CONST;
+	} else {
+		opline->op2.num = 0;
 	}
 }
 

Zend/zend_partial.c

@@ -69,7 +69,7 @@ static zend_always_inline bool zp_is_non_static_closure(const zend_function *fun
 /* Whether argument at offset 'offset' is const. Such arguments can be burned into the generated op_array */
 static inline bool zp_is_const_arg(uint32_t const_args, uint32_t offset) {
 	if (offset < sizeof(const_args) * CHAR_BIT) {
-		return const_args & (1 << offset);
+		return const_args & (UINT32_C(1) << offset);
 	}
 	return false;
 }