Expose InsertPreheaderForLoop from LoopSimplify to other passes

Other passes, PPC counter-loop formation for example, also need to add loop
preheaders outside of the regular loop simplification pass. This makes
InsertPreheaderForLoop a global function so that it can be used by other
passes.

No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182299 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 26 insertions, 0 deletions

diff --git a/include/llvm/Transforms/Utils/LoopSimplify.h b/include/llvm/Transforms/Utils/LoopSimplify.h
new file mode 100644
index 0000000..9588078
--- /dev/null
+++ b/include/llvm/Transforms/Utils/LoopSimplify.h
@@ -0,0 +1,26 @@
+//===- llvm/Transforms/Utils/LoopSimplify.h - Loop utilities -*- C++ -*-======//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines some loop transformation utilities.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_UTILS_LOOPSIMPLIFY_H
+#define LLVM_TRANSFORMS_UTILS_LOOPSIMPLIFY_H
+
+namespace llvm {
+
+class Loop;
+class Pass;
+
+BasicBlock *InsertPreheaderForLoop(Loop *L, Pass *P);
+
+}
+
+#endif