[CTU] Add asserts to protect invariants

Reviewers: xazax.hun, a_sidorin

Subscribers: rnkovacs, dkrupp, Szelethus, gamesh411, cfe-commits

Differential Revision: https://reviews.llvm.org/D55132

llvm-svn: 348586

1 files changed, 3 insertions, 0 deletions

diff --git a/clang/lib/CrossTU/CrossTranslationUnit.cpp b/clang/lib/CrossTU/CrossTranslationUnit.cpp
index 08c9d99ec97..97563b05b00 100644
--- a/clang/lib/CrossTU/CrossTranslationUnit.cpp
+++ b/clang/lib/CrossTU/CrossTranslationUnit.cpp
@@ -160,6 +160,7 @@ llvm::Expected<const FunctionDecl *>
 CrossTranslationUnitContext::getCrossTUDefinition(const FunctionDecl *FD,
                                                   StringRef CrossTUDir,
                                                   StringRef IndexName) {
+  assert(FD && "FD is missing, bad call to this function!");
   assert(!FD->hasBody() && "FD has a definition in current translation unit!");
   ++NumGetCTUCalled;
   const std::string LookupFnName = getLookupName(FD);
@@ -258,6 +259,8 @@ llvm::Expected<ASTUnit *> CrossTranslationUnitContext::loadExternalAST(
 
 llvm::Expected<const FunctionDecl *>
 CrossTranslationUnitContext::importDefinition(const FunctionDecl *FD) {
+  assert(FD->hasBody() && "Functions to be imported should have body.");
+
   ASTImporter &Importer = getOrCreateASTImporter(FD->getASTContext());
   auto *ToDecl =
       cast<FunctionDecl>(Importer.Import(const_cast<FunctionDecl *>(FD)));