[modules] Store a local offset to DeclContext lexical and visible contents. Saves a few bytes for each primary DeclContext.
llvm-svn: 264377
diff --git a/clang/lib/Serialization/ASTWriterDecl.cpp b/clang/lib/Serialization/ASTWriterDecl.cpp
index e22a94d..7523736 100644
--- a/clang/lib/Serialization/ASTWriterDecl.cpp
+++ b/clang/lib/Serialization/ASTWriterDecl.cpp
@@ -136,6 +136,12 @@
void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
+ void AddLocalOffset(uint64_t LocalOffset) {
+ uint64_t Offset = Writer.Stream.GetCurrentBitNo();
+ assert(LocalOffset < Offset && "invalid offset");
+ Record.push_back(LocalOffset ? Offset - LocalOffset : 0);
+ }
+
/// Add an Objective-C type parameter list to the given record.
void AddObjCTypeParamList(ObjCTypeParamList *typeParams) {
// Empty type parameter list.
@@ -1555,8 +1561,8 @@
/// contexts.
void ASTDeclWriter::VisitDeclContext(DeclContext *DC, uint64_t LexicalOffset,
uint64_t VisibleOffset) {
- Record.push_back(LexicalOffset);
- Record.push_back(VisibleOffset);
+ AddLocalOffset(LexicalOffset);
+ AddLocalOffset(VisibleOffset);
}
const Decl *ASTWriter::getFirstLocalDecl(const Decl *D) {
@@ -1626,7 +1632,7 @@
else {
auto Start = Writer.Stream.GetCurrentBitNo();
Writer.Stream.EmitRecord(LOCAL_REDECLARATIONS, LocalRedecls);
- Record.push_back(Writer.Stream.GetCurrentBitNo() - Start);
+ AddLocalOffset(Start);
}
} else {
Record.push_back(0);