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* [gcc r12-1539] Avoid loading an undefined value in the ranger_cache constructor.
@ 2021-06-16 17:13 Andrew Macleod
0 siblings, 0 replies; only message in thread
From: Andrew Macleod @ 2021-06-16 17:13 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:bdfc1207bd20cf1ad81fca121e4f7df4995cc0d6
commit r12-1539-gbdfc1207bd20cf1ad81fca121e4f7df4995cc0d6
Author: Andrew MacLeod <amacleod@redhat.com>
Date: Wed Jun 16 13:01:21 2021 -0400
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:
---
gcc/gimple-range-cache.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/gimple-range-cache.cc b/gcc/gimple-range-cache.cc
index d9a57c294df..37e2acb19f9 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 ()
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