Fix lots of PCH crashes caused by the new assertions in
llvm::SmallVector, using data() instead of &[0]. The PCH testsuite now
runs cleanly (again).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72292 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHReaderDecl.cpp b/lib/Frontend/PCHReaderDecl.cpp
index 53dd6df..7d4c634 100644
--- a/lib/Frontend/PCHReaderDecl.cpp
+++ b/lib/Frontend/PCHReaderDecl.cpp
@@ -247,7 +247,7 @@
   ClassRefs.reserve(NumClassRefs);
   for (unsigned I = 0; I != NumClassRefs; ++I)
     ClassRefs.push_back(cast<ObjCInterfaceDecl>(Reader.GetDecl(Record[Idx++])));
-  CD->setClassList(*Reader.getContext(), &ClassRefs[0], NumClassRefs);
+  CD->setClassList(*Reader.getContext(), ClassRefs.data(), NumClassRefs);
 }
 
 void PCHDeclReader::VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *FPD) {
@@ -257,7 +257,7 @@
   ProtoRefs.reserve(NumProtoRefs);
   for (unsigned I = 0; I != NumProtoRefs; ++I)
     ProtoRefs.push_back(cast<ObjCProtocolDecl>(Reader.GetDecl(Record[Idx++])));
-  FPD->setProtocolList(&ProtoRefs[0], NumProtoRefs, *Reader.getContext());
+  FPD->setProtocolList(ProtoRefs.data(), NumProtoRefs, *Reader.getContext());
 }
 
 void PCHDeclReader::VisitObjCCategoryDecl(ObjCCategoryDecl *CD) {
@@ -373,7 +373,7 @@
   Params.reserve(NumParams);
   for (unsigned I = 0; I != NumParams; ++I)
     Params.push_back(cast<ParmVarDecl>(Reader.GetDecl(Record[Idx++])));
-  BD->setParams(*Reader.getContext(), &Params[0], NumParams);  
+  BD->setParams(*Reader.getContext(), Params.data(), NumParams);  
 }
 
 std::pair<uint64_t, uint64_t> 
@@ -483,7 +483,7 @@
       llvm::SmallVector<unsigned, 16> ArgNums;
       ArgNums.insert(ArgNums.end(), &Record[Idx], &Record[Idx] + Size);
       Idx += Size;
-      New = ::new (*Context) NonNullAttr(&ArgNums[0], Size);
+      New = ::new (*Context) NonNullAttr(ArgNums.data(), Size);
       break;
     }