[AST] Put VarDeclBitfields on a diet

VarDeclBitfields contained bits which are never present in parameters.
Split these out so that ParmVarDeclBitfields wouldn't grow past 32-bits
if another field was added.

llvm-svn: 237648

1 files changed, 9 insertions, 7 deletions

diff --git a/clang/lib/Serialization/ASTReaderDecl.cpp b/clang/lib/Serialization/ASTReaderDecl.cpp
index ed684537a66..fe55459b8a2 100644
--- a/clang/lib/Serialization/ASTReaderDecl.cpp
+++ b/clang/lib/Serialization/ASTReaderDecl.cpp
@@ -1063,13 +1063,15 @@ ASTDeclReader::RedeclarableResult ASTDeclReader::VisitVarDeclImpl(VarDecl *VD) {
   VD->VarDeclBits.SClass = (StorageClass)Record[Idx++];
   VD->VarDeclBits.TSCSpec = Record[Idx++];
   VD->VarDeclBits.InitStyle = Record[Idx++];
-  VD->VarDeclBits.ExceptionVar = Record[Idx++];
-  VD->VarDeclBits.NRVOVariable = Record[Idx++];
-  VD->VarDeclBits.CXXForRangeDecl = Record[Idx++];
-  VD->VarDeclBits.ARCPseudoStrong = Record[Idx++];
-  VD->VarDeclBits.IsConstexpr = Record[Idx++];
-  VD->VarDeclBits.IsInitCapture = Record[Idx++];
-  VD->VarDeclBits.PreviousDeclInSameBlockScope = Record[Idx++];
+  if (!isa<ParmVarDecl>(VD)) {
+    VD->NonParmVarDeclBits.ExceptionVar = Record[Idx++];
+    VD->NonParmVarDeclBits.NRVOVariable = Record[Idx++];
+    VD->NonParmVarDeclBits.CXXForRangeDecl = Record[Idx++];
+    VD->NonParmVarDeclBits.ARCPseudoStrong = Record[Idx++];
+    VD->NonParmVarDeclBits.IsConstexpr = Record[Idx++];
+    VD->NonParmVarDeclBits.IsInitCapture = Record[Idx++];
+    VD->NonParmVarDeclBits.PreviousDeclInSameBlockScope = Record[Idx++];
+  }
   Linkage VarLinkage = Linkage(Record[Idx++]);
   VD->setCachedLinkage(VarLinkage);