* Add implementation of ExtractBasicBlock()

* Add comments to ExtractLoop()


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12053 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/Transforms/Utils/CodeExtractor.cpp b/lib/Transforms/Utils/CodeExtractor.cpp
index 38f3c8a4c6..530d2f66b7 100644
--- a/lib/Transforms/Utils/CodeExtractor.cpp
+++ b/lib/Transforms/Utils/CodeExtractor.cpp
@@ -566,8 +566,18 @@ Function *CodeExtractor::ExtractCodeRegion(const std::vector<BasicBlock*> &code)
   return newFunction;
 }
 
+/// ExtractBasicBlock - slurp a natural loop into a brand new function
+///
 Function* llvm::ExtractLoop(Loop *L) {
   CodeExtractor CE;
   return CE.ExtractCodeRegion(L->getBlocks());
 }
 
+/// ExtractBasicBlock - slurp a basic block into a brand new function
+///
+Function* llvm::ExtractBasicBlock(BasicBlock *BB) {
+  CodeExtractor CE;
+  std::vector<BasicBlock*> Blocks;
+  Blocks.push_back(BB);
+  return CE.ExtractCodeRegion(Blocks);  
+}