Index: clang-tools-extra/test/clang-tidy/checkers/bugprone-string-integer-assignment.cpp
===================================================================
--- clang-tools-extra/test/clang-tidy/checkers/bugprone-string-integer-assignment.cpp
+++ clang-tools-extra/test/clang-tidy/checkers/bugprone-string-integer-assignment.cpp
@@ -103,6 +103,8 @@
   static constexpr T t = 0x8000;
   std::string s;
   void f(char c) { s += c | static_cast<int>(t); }
+  // CHECK-MESSAGES: :[[@LINE-1]]:25: warning: an integer is interpreted as a chara
+  // CHECK-FIXES: {{^}}  void f(char c) { s += std::to_string(c | static_cast<int>(t)); } 
 };
 
 template S<int>;
Index: clang-tools-extra/test/clang-tidy/checkers/misc-unused-parameters.cpp
===================================================================
--- clang-tools-extra/test/clang-tidy/checkers/misc-unused-parameters.cpp
+++ clang-tools-extra/test/clang-tidy/checkers/misc-unused-parameters.cpp
@@ -233,7 +233,7 @@
 template <class>
 class d {
   a e;
-  void f() { e.b(); }
+  void f() { e.b(0); }
 };
 }  // namespace
 }  // namespace PR38055
Index: clang/lib/AST/Expr.cpp
===================================================================
--- clang/lib/AST/Expr.cpp
+++ clang/lib/AST/Expr.cpp
@@ -1675,6 +1675,15 @@
   MemberExpr *E = new (Mem) MemberExpr(Base, IsArrow, OperatorLoc, MemberDecl,
                                        NameInfo, T, VK, OK, NOUR);
 
+  if (FieldDecl *Field = dyn_cast<FieldDecl>(MemberDecl)) {
+    DeclContext *DC = MemberDecl->getDeclContext();
+    // dyn_cast_or_null is used to handle objC variables which do not
+    // have a declaration context.
+    CXXRecordDecl *RD = dyn_cast_or_null<CXXRecordDecl>(DC);
+    if (RD && RD->isDependentContext() && RD->isCurrentInstantiation(DC))
+      E->setTypeDependent(T->isDependentType());
+  }
+
   if (HasQualOrFound) {
     // FIXME: Wrong. We should be looking at the member declaration we found.
     if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
Index: clang/lib/Sema/SemaChecking.cpp
===================================================================
--- clang/lib/Sema/SemaChecking.cpp
+++ clang/lib/Sema/SemaChecking.cpp
@@ -14682,6 +14682,8 @@
   bool AnyIsPacked = false;
   do {
     QualType BaseType = ME->getBase()->getType();
+    if (BaseType->isDependentType())
+      return;
     if (ME->isArrow())
       BaseType = BaseType->getPointeeType();
     RecordDecl *RD = BaseType->castAs<RecordType>()->getDecl();
Index: clang/test/SemaCXX/constant-expression-cxx2a.cpp
===================================================================
--- clang/test/SemaCXX/constant-expression-cxx2a.cpp
+++ clang/test/SemaCXX/constant-expression-cxx2a.cpp
@@ -18,6 +18,7 @@
 [[nodiscard]] void *operator new(std::size_t, std::align_val_t, const std::nothrow_t&) noexcept;
 [[nodiscard]] void *operator new[](std::size_t, const std::nothrow_t&) noexcept;
 [[nodiscard]] void *operator new[](std::size_t, std::align_val_t, const std::nothrow_t&) noexcept;
+[[nodiscard]] void *operator new[](std::size_t, std::align_val_t);
 void operator delete(void*, const std::nothrow_t&) noexcept;
 void operator delete(void*, std::align_val_t, const std::nothrow_t&) noexcept;
 void operator delete[](void*, const std::nothrow_t&) noexcept;
@@ -1050,7 +1051,7 @@
     // Ensure that we don't try to evaluate these for overflow and crash. These
     // are all value-dependent expressions.
     p = new char[n];
-    p = new (n) char[n];
+    p = new ((std::align_val_t)n) char[n];
     p = new char(n);
   }
 }
Index: clang/test/SemaTemplate/dependent-names.cpp
===================================================================
--- clang/test/SemaTemplate/dependent-names.cpp
+++ clang/test/SemaTemplate/dependent-names.cpp
@@ -273,9 +273,6 @@
       }
       int e[10];
     };
-    void g() {
-      S<int>().f(); // expected-note {{here}}
-    }
   }
 
   namespace A2 {
Index: clang/test/SemaTemplate/enum-argument.cpp
===================================================================
--- clang/test/SemaTemplate/enum-argument.cpp
+++ clang/test/SemaTemplate/enum-argument.cpp
@@ -1,5 +1,4 @@
 // RUN: %clang_cc1 -fsyntax-only -verify %s
-// expected-no-diagnostics
 
 enum Enum { val = 1 };
 template <Enum v> struct C {
@@ -31,7 +30,7 @@
     unsigned long long bitfield : e0;
 
     void f(int j) {
-      bitfield + j;
+      bitfield + j; // expected-warning {{expression result unused}}
     }
   };
 }
Index: clang/test/SemaTemplate/member-access-expr.cpp
===================================================================
--- clang/test/SemaTemplate/member-access-expr.cpp
+++ clang/test/SemaTemplate/member-access-expr.cpp
@@ -156,7 +156,7 @@
     void get(B **ptr) {
       // It's okay if at some point we figure out how to diagnose this
       // at instantiation time.
-      *ptr = field;
+      *ptr = field; // expected-error {{assigning to 'test6::B *' from incompatible type 'test6::A *}}
     }
   };
 }
Index: clang/test/SemaTemplate/non-integral-switch-cond.cpp
===================================================================
--- /dev/null
+++ clang/test/SemaTemplate/non-integral-switch-cond.cpp
@@ -0,0 +1,14 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+struct NOT_AN_INTEGRAL_TYPE {};
+
+template <typename T>
+struct foo {
+  NOT_AN_INTEGRAL_TYPE Bad;
+  void run() {
+    switch (Bad) { // expected-error {{statement requires expression of integer type ('NOT_AN_INTEGRAL_TYPE' invalid)}}
+    case 0:
+      break;
+    }
+  }
+};