ASTWriter: Cache some DenseMaps we use repeatedly.
- This reduces our total # of allocations building a PCH for Cocoa.h by almost
a whopping 50%.
- A SmallPtrMap would be cleaner, but since we don't have one yet...
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151697 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTWriterStmt.cpp b/lib/Serialization/ASTWriterStmt.cpp
index 4f766d9..22fdfe1 100644
--- a/lib/Serialization/ASTWriterStmt.cpp
+++ b/lib/Serialization/ASTWriterStmt.cpp
@@ -1586,11 +1586,10 @@
void ASTWriter::FlushStmts() {
RecordData Record;
- /// \brief Set of parent Stmts for the currently serializing sub stmt.
- llvm::DenseSet<Stmt *> ParentStmts;
- /// \brief Offsets of sub stmts already serialized. The offset points
- /// just after the stmt record.
- llvm::DenseMap<Stmt *, uint64_t> SubStmtEntries;
+ // We expect to be the only consumer of the two temporary statement maps,
+ // assert that they are empty.
+ assert(SubStmtEntries.empty() && "unexpected entries in sub stmt map");
+ assert(ParentStmts.empty() && "unexpected entries in parent stmt map");
for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
WriteSubStmt(StmtsToEmit[I], SubStmtEntries, ParentStmts);