Avoid reference counting when RETURN CV

Author: dstogov

ext/opcache/jit/zend_jit_trace.c

@@ -3455,6 +3455,13 @@ static const void *zend_jit_trace(zend_jit_trace_rec *trace_buffer, uint32_t par
 								goto jit_failure;
 						    }
 							for (j = 0 ; j < op_array->last_var; j++) {
+								if (opline->op1_type == IS_CV
+								 && EX_VAR_TO_NUM(opline->op1.var) == j
+								 && !(op1_info & MAY_BE_REF)
+								 && JIT_G(current_frame)
+								 && TRACE_FRAME_IS_RETURN_VALUE_USED(JIT_G(current_frame))) {
+									continue;
+								}
 								// TODO: get info from trace ???
 								uint32_t info = zend_ssa_cv_info(opline, op_array, op_array_ssa, j);
 								zend_uchar type = STACK_TYPE(stack, j);

ext/opcache/jit/zend_jit_x86.dasc

@@ -9928,8 +9928,10 @@ static int zend_jit_return(dasm_State **Dst, const zend_op *opline, const zend_o
 			op1_addr = ZEND_ADDR_MEM_ZVAL(ZREG_R0, 0);
 		}
 		|	ZVAL_COPY_VALUE ret_addr, MAY_BE_ANY, op1_addr, op1_info, ZREG_R0, ZREG_R2
-		|	// TODO: JIT: if (EXPECTED(!(EX_CALL_INFO() & ZEND_CALL_CODE))) ZVAL_NULL(retval_ptr); ???
-		|	TRY_ADDREF op1_info, ah, r2
+		if (JIT_G(trigger) != ZEND_JIT_ON_HOT_TRACE || (op1_info & MAY_BE_REF) || (return_value_used != 1)) {
+			|	// TODO: JIT: if (EXPECTED(!(EX_CALL_INFO() & ZEND_CALL_CODE))) ZVAL_NULL(retval_ptr); ???
+			|	TRY_ADDREF op1_info, ah, r2
+		}
 	} else {
 		if (op1_info & MAY_BE_REF) {
 			zend_jit_addr ref_addr = ZEND_ADDR_MEM_ZVAL(ZREG_R0, offsetof(zend_reference, val));