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Diffstat (limited to 'include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h')
-rw-r--r-- | include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h b/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h new file mode 100644 index 0000000..4028320 --- /dev/null +++ b/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h @@ -0,0 +1,40 @@ +//===- LowerExpectIntrinsic.h - LowerExpectIntrinsic pass -------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +/// \file +/// +/// The header file for the LowerExpectIntrinsic pass as used by the new pass +/// manager. +/// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_TRANSFORMS_SCALAR_LOWEREXPECTINTRINSIC_H +#define LLVM_TRANSFORMS_SCALAR_LOWEREXPECTINTRINSIC_H + +#include "llvm/IR/Function.h" +#include "llvm/IR/PassManager.h" + +namespace llvm { + +class LowerExpectIntrinsicPass { +public: + static StringRef name() { return "LowerExpectIntrinsicPass"; } + + /// \brief Run the pass over the function. + /// + /// This will lower all of th expect intrinsic calls in this function into + /// branch weight metadata. That metadata will subsequently feed the analysis + /// of the probabilities and frequencies of the CFG. After running this pass, + /// no more expect intrinsics remain, allowing the rest of the optimizer to + /// ignore them. + PreservedAnalyses run(Function &F); +}; + +} + +#endif |