From: Dmitry Stogov <dmitry@zend.com>
Date: Wed, 18 Nov 2020 07:22:25 +0000 (+0300)
Subject: Fixed register clobbering
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=feed041fc88d14da20e3bb1db7e17b8982b2687f;p=php

Fixed register clobbering
---

diff --git a/ext/opcache/jit/zend_jit_x86.dasc b/ext/opcache/jit/zend_jit_x86.dasc
index f00ea8cb9c..9187e3d7f0 100644
--- a/ext/opcache/jit/zend_jit_x86.dasc
+++ b/ext/opcache/jit/zend_jit_x86.dasc
@@ -3137,6 +3137,10 @@ static int zend_jit_trace_begin(dasm_State **Dst, uint32_t trace_num, zend_jit_t
 		}
 	}
 
+	if (parent && parent->exit_info[exit_num].flags & ZEND_JIT_EXIT_METHOD_CALL) {
+		ZEND_REGSET_EXCL(regset, ZREG_R0);
+	}
+
 	current_trace_num = trace_num;
 
 	|	// EG(jit_trace_num) = trace_num;