From e5dd70708596ae51455a0ffa086a00c5b29f8583 Mon Sep 17 00:00:00 2001
From: patrick <patrick@openbsd.org>
Date: Mon, 3 Aug 2020 14:31:31 +0000
Subject: Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty
---
 gnu/llvm/clang/lib/AST/Interp/Block.cpp | 87 +++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 gnu/llvm/clang/lib/AST/Interp/Block.cpp

(limited to 'gnu/llvm/clang/lib/AST/Interp/Block.cpp')

diff --git a/gnu/llvm/clang/lib/AST/Interp/Block.cpp b/gnu/llvm/clang/lib/AST/Interp/Block.cpp
new file mode 100644
index 00000000000..5fc93eb39f4
--- /dev/null
+++ b/gnu/llvm/clang/lib/AST/Interp/Block.cpp
@@ -0,0 +1,87 @@
+//===--- Block.cpp - Allocated blocks for the interpreter -------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines the classes describing allocated blocks.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Block.h"
+#include "Pointer.h"
+
+using namespace clang;
+using namespace clang::interp;
+
+
+
+void Block::addPointer(Pointer *P) {
+  if (IsStatic)
+    return;
+  if (Pointers)
+    Pointers->Prev = P;
+  P->Next = Pointers;
+  P->Prev = nullptr;
+  Pointers = P;
+}
+
+void Block::removePointer(Pointer *P) {
+  if (IsStatic)
+    return;
+  if (Pointers == P)
+    Pointers = P->Next;
+  if (P->Prev)
+    P->Prev->Next = P->Next;
+  if (P->Next)
+    P->Next->Prev = P->Prev;
+}
+
+void Block::cleanup() {
+  if (Pointers == nullptr && IsDead)
+    (reinterpret_cast<DeadBlock *>(this + 1) - 1)->free();
+}
+
+void Block::movePointer(Pointer *From, Pointer *To) {
+  if (IsStatic)
+    return;
+  To->Prev = From->Prev;
+  if (To->Prev)
+    To->Prev->Next = To;
+  To->Next = From->Next;
+  if (To->Next)
+    To->Next->Prev = To;
+  if (Pointers == From)
+    Pointers = To;
+
+  From->Prev = nullptr;
+  From->Next = nullptr;
+}
+
+DeadBlock::DeadBlock(DeadBlock *&Root, Block *Blk)
+    : Root(Root), B(Blk->Desc, Blk->IsStatic, Blk->IsExtern, /*isDead=*/true) {
+  // Add the block to the chain of dead blocks.
+  if (Root)
+    Root->Prev = this;
+
+  Next = Root;
+  Prev = nullptr;
+  Root = this;
+
+  // Transfer pointers.
+  B.Pointers = Blk->Pointers;
+  for (Pointer *P = Blk->Pointers; P; P = P->Next)
+    P->Pointee = &B;
+}
+
+void DeadBlock::free() {
+  if (Prev)
+    Prev->Next = Next;
+  if (Next)
+    Next->Prev = Prev;
+  if (Root == this)
+    Root = Next;
+  ::free(this);
+}
-- 
cgit v1.2.3-59-g8ed1b