From 0b57cec536236d46e3dba9bd041533462f33dbb7 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Fri, 20 Dec 2019 19:53:05 +0000
Subject: Move all sources from the llvm project into contrib/llvm-project.

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo".  That is, most of
the earlier separate sub-projects with their own branches and tags were
consolidated into one top-level directory, and are now branched and
tagged together.

Updating the vendor area to match this layout is next.
---
 .../llvm-project/llvm/lib/Analysis/Interval.cpp    | 51 ++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 contrib/llvm-project/llvm/lib/Analysis/Interval.cpp

(limited to 'contrib/llvm-project/llvm/lib/Analysis/Interval.cpp')

diff --git a/contrib/llvm-project/llvm/lib/Analysis/Interval.cpp b/contrib/llvm-project/llvm/lib/Analysis/Interval.cpp
new file mode 100644
index 000000000000..07d6e27c13be
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/Analysis/Interval.cpp
@@ -0,0 +1,51 @@
+//===- Interval.cpp - Interval class code ---------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the definition of the Interval class, which represents a
+// partition of a control flow graph of some kind.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/Interval.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/CFG.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// Interval Implementation
+//===----------------------------------------------------------------------===//
+
+// isLoop - Find out if there is a back edge in this interval...
+bool Interval::isLoop() const {
+  // There is a loop in this interval iff one of the predecessors of the header
+  // node lives in the interval.
+  for (::pred_iterator I = ::pred_begin(HeaderNode), E = ::pred_end(HeaderNode);
+       I != E; ++I)
+    if (contains(*I))
+      return true;
+  return false;
+}
+
+void Interval::print(raw_ostream &OS) const {
+  OS << "-------------------------------------------------------------\n"
+       << "Interval Contents:\n";
+
+  // Print out all of the basic blocks in the interval...
+  for (const BasicBlock *Node : Nodes)
+    OS << *Node << "\n";
+
+  OS << "Interval Predecessors:\n";
+  for (const BasicBlock *Predecessor : Predecessors)
+    OS << *Predecessor << "\n";
+
+  OS << "Interval Successors:\n";
+  for (const BasicBlock *Successor : Successors)
+    OS << *Successor << "\n";
+}
-- 
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