Introduce reference counting for statements and expressions, using it

to allow sharing of nodes. Simplifies some aspects of template
instantiation, and fixes both PR3444 and <rdar://problem/6757457>.

llvm-svn: 78450

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/Frontend/PCHReaderStmt.cpp b/clang/lib/Frontend/PCHReaderStmt.cpp
index 6b97e610f57..3040a52260b 100644
--- a/clang/lib/Frontend/PCHReaderStmt.cpp
+++ b/clang/lib/Frontend/PCHReaderStmt.cpp
@@ -194,6 +194,10 @@ unsigned PCHStmtReader::VisitSwitchStmt(SwitchStmt *S) {
       PrevSC->setNextSwitchCase(SC);
     else
       S->setSwitchCaseList(SC);
+    
+    // Retain this SwitchCase, since SwitchStmt::addSwitchCase() would
+    // normally retain it (but we aren't calling addSwitchCase).
+    SC->Retain();
     PrevSC = SC;
   }
   return 2;