[Modules] Use global index to improve typo correction performance
Typo correction for an unqualified name needs to walk through all of the identifier tables of all modules.
When we have a global index, just walk its identifier table only.
rdar://13425732
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179730 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/GlobalModuleIndex.cpp b/lib/Serialization/GlobalModuleIndex.cpp
index f9acb84..b6693e4 100644
--- a/lib/Serialization/GlobalModuleIndex.cpp
+++ b/lib/Serialization/GlobalModuleIndex.cpp
@@ -818,3 +818,34 @@
// We're done.
return EC_None;
}
+
+namespace {
+ class GlobalIndexIdentifierIterator : public IdentifierIterator {
+ /// \brief The current position within the identifier lookup table.
+ IdentifierIndexTable::key_iterator Current;
+
+ /// \brief The end position within the identifier lookup table.
+ IdentifierIndexTable::key_iterator End;
+
+ public:
+ explicit GlobalIndexIdentifierIterator(IdentifierIndexTable &Idx) {
+ Current = Idx.key_begin();
+ End = Idx.key_end();
+ }
+
+ virtual StringRef Next() {
+ if (Current == End)
+ return StringRef();
+
+ StringRef Result = *Current;
+ ++Current;
+ return Result;
+ }
+ };
+}
+
+IdentifierIterator *GlobalModuleIndex::createIdentifierIterator() const {
+ IdentifierIndexTable &Table =
+ *static_cast<IdentifierIndexTable *>(IdentifierIndex);
+ return new GlobalIndexIdentifierIterator(Table);
+}