From: Xinchen Hui <laruence@php.net>
Date: Wed, 8 Jul 2015 09:44:54 +0000 (+0800)
Subject: Add comment to explaining the new check
X-Git-Tag: php-7.1.1RC1~35^2~65
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=249915f938f6880b68ab6c6a47952c509dc51604;p=php

Add comment to explaining the new check
---

diff --git a/ext/opcache/Optimizer/optimize_temp_vars_5.c b/ext/opcache/Optimizer/optimize_temp_vars_5.c
index de170d2295..f60f61cb45 100644
--- a/ext/opcache/Optimizer/optimize_temp_vars_5.c
+++ b/ext/opcache/Optimizer/optimize_temp_vars_5.c
@@ -152,6 +152,9 @@ void optimize_temporary_variables(zend_op_array *op_array, zend_optimizer_ctx *c
 			currT = VAR_NUM(ZEND_RESULT(opline).var) - offset;
 			if (valid_T[currT]) {
 				if (start_of_T[currT] == opline) {
+					/* ZEND_FAST_CALL can not share temporary var with others
+					 * since the fast_var could also be set by ZEND_HANDLE_EXCEPTION
+					 * which could be ahead of it */
 					if (opline->opcode != ZEND_FAST_CALL) {
 						taken_T[map_T[currT]] = 0;
 					}