From: Andrew MacLeod <amacleod@redhat.com>
Date: Wed, 16 Jun 2021 17:01:21 +0000 (-0400)
Subject: Avoid loading an undefined value in the ranger_cache constructor.
X-Git-Tag: basepoints/gcc-13~6774
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bdfc1207bd20cf1ad81fca121e4f7df4995cc0d6;p=thirdparty%2Fgcc.git

Avoid loading an undefined value in the ranger_cache constructor.

Enable_new_values takes a boolean, returning the old value.  The constructor
for ranger_cache initialized the m_new_value_p field by calling this routine
and ignorng the result.  This potentially loads the old value uninitialized.

	* gimple-range-cache.cc (ranger_cache::ranger_cache): Initialize
	m_new_value_p directly.
---

diff --git a/gcc/gimple-range-cache.cc b/gcc/gimple-range-cache.cc
index d9a57c294df2..37e2acb19f9d 100644
--- a/gcc/gimple-range-cache.cc
+++ b/gcc/gimple-range-cache.cc
@@ -727,7 +727,7 @@ ranger_cache::ranger_cache (gimple_ranger &q) : query (q)
       if (bb)
 	m_gori.exports (bb);
     }
-  enable_new_values (true);
+  m_new_value_p = true;
 }
 
 ranger_cache::~ranger_cache ()