Merge "Update aosp/master LLVM for rebase to r230699."

1 files changed, 46 insertions, 0 deletions

diff --git a/include/llvm/Transforms/Scalar/SimplifyCFG.h b/include/llvm/Transforms/Scalar/SimplifyCFG.h
new file mode 100644
index 0000000..ef28e0f
--- /dev/null
+++ b/include/llvm/Transforms/Scalar/SimplifyCFG.h
@@ -0,0 +1,46 @@
+//===- SimplifyCFG.h - Simplify and canonicalize the CFG --------*- 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 the pass responsible for both
+/// simplifying and canonicalizing the CFG.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_SCALAR_SIMPLIFYCFG_H
+#define LLVM_TRANSFORMS_SCALAR_SIMPLIFYCFG_H
+
+#include "llvm/IR/Function.h"
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+/// \brief A pass to simplify and canonicalize the CFG of a function.
+///
+/// This pass iteratively simplifies the entire CFG of a function, removing
+/// unnecessary control flows and bringing it into the canonical form expected
+/// by the rest of the mid-level optimizer.
+class SimplifyCFGPass {
+  int BonusInstThreshold;
+
+public:
+  static StringRef name() { return "SimplifyCFGPass"; }
+
+  /// \brief Construct a pass with the default thresholds.
+  SimplifyCFGPass();
+
+  /// \brief Construct a pass with a specific bonus threshold.
+  SimplifyCFGPass(int BonusInstThreshold);
+
+  /// \brief Run the pass over the function.
+  PreservedAnalyses run(Function &F, AnalysisManager<Function> *AM);
+};
+
+}
+
+#endif