[Clang Interpreter] Initial patch for the constexpr interpreter

Summary:
This patch introduces the skeleton of the constexpr interpreter,
capable of evaluating a simple constexpr functions consisting of
if statements. The interpreter is described in more detail in the
RFC. Further patches will add more features.

Reviewers: Bigcheese, jfb, rsmith

Subscribers: bruno, uenoku, ldionne, Tyker, thegameg, tschuett, dexonsmith, mgorny, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64146

llvm-svn: 370636

1 files changed, 14 insertions, 0 deletions

diff --git a/clang/lib/AST/Interp/Frame.cpp b/clang/lib/AST/Interp/Frame.cpp
new file mode 100644
index 00000000000..16134aa1db3
--- /dev/null
+++ b/clang/lib/AST/Interp/Frame.cpp
@@ -0,0 +1,14 @@
+//===--- Frame.cpp - Call frame for the VM and AST Walker -------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "Frame.h"
+
+using namespace clang;
+using namespace clang::interp;
+
+Frame::~Frame() {}