Optimize unqualified/global name lookup in modules by introducing a
generational scheme for identifiers that avoids searching the hash
tables of a given module more than once for a given
identifier. Previously, loading any new module invalidated all of the
previous lookup results for all identifiers, causing us to perform the
lookups repeatedly.
llvm-svn: 148412
diff --git a/clang/lib/Serialization/Module.cpp b/clang/lib/Serialization/Module.cpp
index cb8c9cc..bed545a 100644
--- a/clang/lib/Serialization/Module.cpp
+++ b/clang/lib/Serialization/Module.cpp
@@ -20,8 +20,8 @@
using namespace serialization;
using namespace reader;
-ModuleFile::ModuleFile(ModuleKind Kind)
- : Kind(Kind), DirectlyImported(false), SizeInBits(0),
+ModuleFile::ModuleFile(ModuleKind Kind, unsigned Generation)
+ : Kind(Kind), DirectlyImported(false), Generation(Generation), SizeInBits(0),
LocalNumSLocEntries(0), SLocEntryBaseID(0),
SLocEntryBaseOffset(0), SLocEntryOffsets(0),
SLocFileOffsets(0), LocalNumIdentifiers(0),