1 files changed, 39 insertions, 0 deletions
diff --git a/include/llvm/Transforms/Scalar/EarlyCSE.h b/include/llvm/Transforms/Scalar/EarlyCSE.h
new file mode 100644
index 0000000..e3dd3c0
--- /dev/null
+++ b/include/llvm/Transforms/Scalar/EarlyCSE.h
@@ -0,0 +1,39 @@
+//===- EarlyCSE.h - Simple and fast CSE pass --------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// This file provides the interface for a simple, fast CSE pass.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_SCALAR_EARLYCSE_H
+#define LLVM_TRANSFORMS_SCALAR_EARLYCSE_H
+
+#include "llvm/IR/Function.h"
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+/// \brief A simple and fast domtree-based CSE pass.
+///
+/// This pass does a simple depth-first walk over the dominator tree,
+/// eliminating trivially redundant instructions and using instsimplify to
+/// canonicalize things as it goes. It is intended to be fast and catch obvious
+/// cases so that instcombine and other passes are more effective. It is
+/// expected that a later pass of GVN will catch the interesting/hard cases.
+class EarlyCSEPass {
+public:
+  static StringRef name() { return "EarlyCSEPass"; }
+
+  /// \brief Run the pass over the function.
+  PreservedAnalyses run(Function &F, AnalysisManager<Function> *AM);
+};
+
+}
+
+#endif