From 3903320a48b2cc4ca08c04b6e621ace34de74b29 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Thu, 29 Oct 2009 00:09:08 +0000
Subject: [PATCH] Add a hasAddressTaken for BasicBlock.

llvm-svn: 85449
---
 llvm/include/llvm/BasicBlock.h | 4 ++++
 llvm/lib/VMCore/BasicBlock.cpp | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/llvm/include/llvm/BasicBlock.h b/llvm/include/llvm/BasicBlock.h
index 95e39716f2e7..c6e60802093f 100644
--- a/llvm/include/llvm/BasicBlock.h
+++ b/llvm/include/llvm/BasicBlock.h
@@ -235,6 +235,10 @@ public:
   /// keeping loop information consistent, use the SplitBlock utility function.
   ///
   BasicBlock *splitBasicBlock(iterator I, const Twine &BBName = "");
+
+  /// hasAddressTaken - returns true if there are any uses of this basic block
+  /// other than direct branches, switches, etc. to it.
+  bool hasAddressTaken() const;
 };
 
 } // End llvm namespace
diff --git a/llvm/lib/VMCore/BasicBlock.cpp b/llvm/lib/VMCore/BasicBlock.cpp
index 50cf84c3fe62..ede2d1245107 100644
--- a/llvm/lib/VMCore/BasicBlock.cpp
+++ b/llvm/lib/VMCore/BasicBlock.cpp
@@ -277,3 +277,12 @@ BasicBlock *BasicBlock::splitBasicBlock(iterator I, const Twine &BBName) {
   }
   return New;
 }
+
+/// hasAddressTaken - returns true if there are any uses of this basic block
+/// other than direct branches, switches, etc. to it.
+bool BasicBlock::hasAddressTaken() const {
+  for (Value::use_const_iterator I = use_begin(), E = use_end(); I != E; ++I)
+    if (isa<BlockAddress>(*I))
+      return true;
+  return false;
+}