Revert [Clang Interpreter] Initial patch for the constexpr interpreter

This reverts r370584 (git commit afcb3de117265a69d21e5673356e925a454d7d02)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@370588 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 77 deletions

diff --git a/lib/AST/Interp/InterpStack.cpp b/lib/AST/Interp/InterpStack.cpp
deleted file mode 100644
index f159fe1955..0000000000
--- a/lib/AST/Interp/InterpStack.cpp
+++ /dev/null
@@ -1,77 +0,0 @@
-//===--- InterpStack.cpp - Stack implementation for the VM ------*- 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 <cassert>
-#include "InterpStack.h"
-
-using namespace clang;
-using namespace clang::interp;
-
-InterpStack::~InterpStack() {
-  clear();
-}
-
-void InterpStack::clear() {
-  if (Chunk && Chunk->Next)
-    free(Chunk->Next);
-  if (Chunk)
-    free(Chunk);
-  Chunk = nullptr;
-  StackSize = 0;
-}
-
-void *InterpStack::grow(size_t Size) {
-  assert(Size < ChunkSize - sizeof(StackChunk) && "Object too large");
-
-  if (!Chunk || sizeof(StackChunk) + Chunk->size() + Size > ChunkSize) {
-    if (Chunk && Chunk->Next) {
-      Chunk = Chunk->Next;
-    } else {
-      StackChunk *Next = new (malloc(ChunkSize)) StackChunk(Chunk);
-      if (Chunk)
-        Chunk->Next = Next;
-      Chunk = Next;
-    }
-  }
-
-  auto *Object = reinterpret_cast<void *>(Chunk->End);
-  Chunk->End += Size;
-  StackSize += Size;
-  return Object;
-}
-
-void *InterpStack::peek(size_t Size) {
-  assert(Chunk && "Stack is empty!");
-
-  StackChunk *Ptr = Chunk;
-  while (Size > Ptr->size()) {
-    Size -= Ptr->size();
-    Ptr = Ptr->Prev;
-    assert(Ptr && "Offset too large");
-  }
-
-  return reinterpret_cast<void *>(Ptr->End - Size);
-}
-
-void InterpStack::shrink(size_t Size) {
-  assert(Chunk && "Chunk is empty!");
-
-  while (Size > Chunk->size()) {
-    Size -= Chunk->size();
-    if (Chunk->Next) {
-      free(Chunk->Next);
-      Chunk->Next = nullptr;
-    }
-    Chunk->End = Chunk->start();
-    Chunk = Chunk->Prev;
-    assert(Chunk && "Offset too large");
-  }
-
-  Chunk->End -= Size;
-  StackSize -= Size;
-}