Teach CallGraph to look into Generic Lambdas.

CallGraph visited LambdaExpr by getting the Call Operator from
CXXRecordDecl (LambdaExpr::getCallOperator calls
CXXRecordDecl::getLambdaCallOperator), which replaced generic lambda
call operators with the non-instantiated FunctionDecl.  The result was
that the CallGraph would only pick up non-dependent calls.

This patch does a few things:
1- Extend CXXRecordDecl to have a getDependentLambdaCallOperator, which
will get the FunctionTemplateDecl, rather than immediately getting the
TemplateDecl.
2- Define getLambdaCallOperator and getDependentLambdaCallOperator in
terms of a common function.
3- Extend LambdaExpr with a getDependentCallOperator, which just calls
the above function.
4- Changes CallGraph to handle Generic LambdaExprs.

llvm-svn: 373247

1 files changed, 5 insertions, 0 deletions

diff --git a/clang/lib/AST/ExprCXX.cpp b/clang/lib/AST/ExprCXX.cpp
index 30c28314d5b..1d5fd80d0d4 100644
--- a/clang/lib/AST/ExprCXX.cpp
+++ b/clang/lib/AST/ExprCXX.cpp
@@ -1218,6 +1218,11 @@ CXXMethodDecl *LambdaExpr::getCallOperator() const {
   return Record->getLambdaCallOperator();
 }
 
+FunctionTemplateDecl *LambdaExpr::getDependentCallOperator() const {
+  CXXRecordDecl *Record = getLambdaClass();
+  return Record->getDependentLambdaCallOperator();
+}
+
 TemplateParameterList *LambdaExpr::getTemplateParameterList() const {
   CXXRecordDecl *Record = getLambdaClass();
   return Record->getGenericLambdaTemplateParameterList();