From: Zhongxing Xu <xuzhongxing@gmail.com>
Date: Thu, 12 Mar 2009 07:54:17 +0000 (+0000)
Subject: Add comments.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9d8d0fc04d69bfae2478eb17df5e0335648a82c5;p=clang

Add comments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66782 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Analysis/Environment.cpp b/lib/Analysis/Environment.cpp
index 41adddc360..2bc071a265 100644
--- a/lib/Analysis/Environment.cpp
+++ b/lib/Analysis/Environment.cpp
@@ -115,6 +115,14 @@ public:
 };
 } // end anonymous namespace
 
+// RemoveDeadBindings:
+//  - Remove subexpression bindings.
+//  - Remove dead block expression bindings.
+//  - Keep live block expression bindings:
+//   - Mark their reachable symbols live in SymbolReaper, 
+//     see ScanReachableSymbols.
+//   - Mark the region in DRoots if the binding is a loc::MemRegionVal.
+
 Environment 
 EnvironmentManager::RemoveDeadBindings(Environment Env, Stmt* Loc,
                                        SymbolReaper& SymReaper,