[libclang] Introduce a new indexing mode where we skip function bodies

that were already parsed in the same "indexing session".

An indexing session is defined as using the same CXIndexAction object
for multiple clang_indexSourceFile calls.
Passing CXIndexOpt_SkipParsedBodiesInSession as an indexing option will
enable the mode where we try to skip bodies that were already parsed in
another translation unit.

If a function's body was skipped, the "flags" field in the CXIdxDeclInfo
structure will have "CXIdxDeclFlag_Skipped" bit was set.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169539 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 24 insertions, 4 deletions

diff --git a/tools/libclang/IndexingContext.cpp b/tools/libclang/IndexingContext.cpp
index 8ba1854baa..8f7102911e 100644
--- a/tools/libclang/IndexingContext.cpp
+++ b/tools/libclang/IndexingContext.cpp
@@ -364,8 +364,18 @@ bool IndexingContext::handleObjCContainer(const ObjCContainerDecl *D,
 }
 
 bool IndexingContext::handleFunction(const FunctionDecl *D) {
-  DeclInfo DInfo(!D->isFirstDeclaration(), D->isThisDeclarationADefinition(),
-                 D->isThisDeclarationADefinition());
+  bool isDef = D->isThisDeclarationADefinition();
+  bool isContainer = isDef;
+  bool isSkipped = false;
+  if (D->hasSkippedBody()) {
+    isSkipped = true;
+    isDef = true;
+    isContainer = false;
+  }
+
+  DeclInfo DInfo(!D->isFirstDeclaration(), isDef, isContainer);
+  if (isSkipped)
+    DInfo.flags |= CXIdxDeclFlag_Skipped;
   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
 }
 
@@ -548,8 +558,18 @@ bool IndexingContext::handleObjCCategoryImpl(const ObjCCategoryImplDecl *D) {
 }
 
 bool IndexingContext::handleObjCMethod(const ObjCMethodDecl *D) {
-  DeclInfo DInfo(!D->isCanonicalDecl(), D->isThisDeclarationADefinition(),
-                 D->isThisDeclarationADefinition());
+  bool isDef = D->isThisDeclarationADefinition();
+  bool isContainer = isDef;
+  bool isSkipped = false;
+  if (D->hasSkippedBody()) {
+    isSkipped = true;
+    isDef = true;
+    isContainer = false;
+  }
+
+  DeclInfo DInfo(!D->isCanonicalDecl(), isDef, isContainer);
+  if (isSkipped)
+    DInfo.flags |= CXIdxDeclFlag_Skipped;
   return handleDecl(D, D->getLocation(), getCursor(D), DInfo);
 }