[do not merge] add some debug prints for linux bot failures.

Author: zoecarver

lib/ClangImporter/ClangImporter.cpp

@@ -5850,6 +5850,8 @@ static bool hasPointerInSubobjects(const clang::CXXRecordDecl *decl) {
 }
 
 static bool copyConstructorIsDefaulted(const clang::CXXRecordDecl *decl) {
+  llvm::dbgs() << "copy ctor is default\n";
+
   auto ctor = llvm::find_if(decl->ctors(), [](clang::CXXConstructorDecl *ctor) {
     return ctor->isCopyConstructor();
   });
@@ -5859,9 +5861,12 @@ static bool copyConstructorIsDefaulted(const clang::CXXRecordDecl *decl) {
 }
 
 static bool copyAssignOperatorIsDefaulted(const clang::CXXRecordDecl *decl) {
+  llvm::dbgs() << "copy assign is default\n";
+
   auto copyAssignOp = llvm::find_if(decl->decls(), [](clang::Decl *member) {
     if (auto method = dyn_cast<clang::CXXMethodDecl>(member))
       return method->isCopyAssignmentOperator();
+    return false;
   });
 
   assert(copyAssignOp != decl->decls_end());
@@ -5880,6 +5885,8 @@ static bool isSufficientlyTrivial(const clang::CXXRecordDecl *decl) {
   if (!decl->getDefinition())
     return true;
 
+  llvm::dbgs() << "has dtor = " << (decl->getDestructor() == nullptr ? "NO" : "YES") << "\n";
+
   if ((decl->hasUserDeclaredCopyConstructor() &&
        !copyConstructorIsDefaulted(decl)) ||
       (decl->hasUserDeclaredCopyAssignment() &&
@@ -5888,10 +5895,17 @@ static bool isSufficientlyTrivial(const clang::CXXRecordDecl *decl) {
        !decl->getDestructor()->isDefaulted()))
     return false;
 
-  auto checkType = [](clang::QualType t) {
+  llvm::dbgs() << "checking subtypes...\n";
+
+  auto checkType = [decl](clang::QualType t) {
+    PrettyStackTraceClangType trace(decl->getASTContext(), "checking subtype if sufficently trivial", t.getTypePtr());
+
     if (auto recordType = dyn_cast<clang::RecordType>(t.getCanonicalType())) {
       if (auto cxxRecord =
               dyn_cast<clang::CXXRecordDecl>(recordType->getDecl())) {
+        clang::PrettyStackTraceDecl trace(cxxRecord, clang::SourceLocation(),
+                                          cxxRecord->getASTContext().getSourceManager(),
+                                          "checking subtype recrod if sufficently trivial");
         if (hasImportAsRefAttr(cxxRecord) || hasOwnedValueAttr(cxxRecord) ||
             hasUnsafeAPIAttr(cxxRecord))
           return true;