From 97f9fe06e7acd55d7d9075a41e33f54855c75eae Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Tue, 25 Oct 2011 00:41:24 +0000
Subject: [PATCH] Don't forget the lvalue-to-rvalue conversion on the LHS of an
 -> when rebuilding it during template instantiation, for a known RHS decl.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142890 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/TreeTransform.h                     |  5 +++++
 test/SemaCXX/warn-thread-safety-analysis.cpp | 21 ++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/lib/Sema/TreeTransform.h b/lib/Sema/TreeTransform.h
index 03a1d78aa0..b4073eb650 100644
--- a/lib/Sema/TreeTransform.h
+++ b/lib/Sema/TreeTransform.h
@@ -1485,6 +1485,11 @@ public:
     ExprResult BaseResult = getSema().DefaultFunctionArrayConversion(Base);
     if (BaseResult.isInvalid())
       return ExprError();
+    if (isArrow) {
+      BaseResult = getSema().DefaultLvalueConversion(BaseResult.get());
+      if (BaseResult.isInvalid())
+        return ExprError();
+    }
     Base = BaseResult.take();
     QualType BaseType = Base->getType();
 
diff --git a/test/SemaCXX/warn-thread-safety-analysis.cpp b/test/SemaCXX/warn-thread-safety-analysis.cpp
index 7adead763e..83e0ff08b9 100644
--- a/test/SemaCXX/warn-thread-safety-analysis.cpp
+++ b/test/SemaCXX/warn-thread-safety-analysis.cpp
@@ -1509,4 +1509,25 @@ void foo() {
 
 } // end namespace invalid_lock_expression_test
 
+namespace template_member_test {
 
+  struct S { int n; };
+  struct T {
+    Mutex m;
+    S *s GUARDED_BY(this->m);
+  };
+
+  template<typename U>
+  struct IndirectLock {
+    int DoNaughtyThings(T *t) {
+      return t->s->n; // expected-warning {{reading variable 's' requires locking 'm'}}
+    }
+  };
+
+  struct MutexWrapper {
+    typedef Mutex Lock;
+  };
+
+  template struct IndirectLock<MutexWrapper>; // expected-note {{here}}
+
+}
-- 
2.40.0