Fix a build bot failure and multiple warnings instances for range base for loops

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@368459 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaInit.cpp

@@ -6616,7 +6616,7 @@ static void handleGslAnnotatedTypes(IndirectLocalPath &Path, Expr *Call,
     return;
   } else if (auto *OCE = dyn_cast<CXXOperatorCallExpr>(Call)) {
     FunctionDecl *Callee = OCE->getDirectCallee();
-    if (Callee->isCXXInstanceMember() &&
+    if (Callee && Callee->isCXXInstanceMember() &&
         shouldTrackImplicitObjectArg(cast<CXXMethodDecl>(Callee)))
       VisitPointerArg(Callee, OCE->getArg(0));
     return;
@@ -7070,8 +7070,11 @@ static SourceRange nextPathEntryRange(const IndirectLocalPath &Path, unsigned I,
       // supporting lifetime extension.
       break;
 
-    case IndirectLocalPathEntry::DefaultInit:
     case IndirectLocalPathEntry::VarInit:
+      if (cast<VarDecl>(Path[I].D)->isImplicit())
+        return SourceRange();
+      LLVM_FALLTHROUGH;
+    case IndirectLocalPathEntry::DefaultInit:
       return Path[I].E->getSourceRange();
     }
   }
@@ -7133,7 +7136,7 @@ void Sema::checkInitializerLifetime(const InitializedEntity &Entity,
         return false;
       }
 
-      if (IsGslPtrInitWithGslTempOwner) {
+      if (IsGslPtrInitWithGslTempOwner && DiagLoc.isValid()) {
         Diag(DiagLoc, diag::warn_dangling_lifetime_pointer) << DiagRange;
         return false;
       }

test/Sema/warn-lifetime-analysis-nocfg.cpp

@@ -201,6 +201,13 @@ void danglingReferenceFromTempOwner() {
 std::vector<int> getTempVec();
 std::optional<std::vector<int>> getTempOptVec();
 
+void testLoops() {
+  for (auto i : getTempVec()) // ok
+    ;
+  for (auto i : *getTempOptVec()) // expected-warning {{object backing the pointer will be destroyed at the end of the full-expression}}
+    ;
+}
+
 int &usedToBeFalsePositive(std::vector<int> &v) {
   std::vector<int>::iterator it = v.begin();
   int& value = *it;