Alina Sbirlea 0445c64998 [DomTree] Replace ChildrenGetter with GraphTraits over GraphDiff.
This replaces the ChildrenGetter inside the DominatorTree with
GraphTraits over a GraphDiff object, an object which encapsulated the
view of the previous CFG.
This also simplifies the extentions in clang which use DominatorTree, as
GraphDiff also filters nullptrs.

Re-land a90374988e4eb8c50d91e11f4e61cdbd5debb235 after moving CFGDiff.h
to Support.

Differential Revision: https://reviews.llvm.org/D77341
2020-04-10 07:38:53 +00:00
..

The LLVM Compiler Infrastructure
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.