Coverage Report

Created: 2018-07-12 09:57

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h
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//===- SelectionDAGAddressAnalysis.h - DAG Address Analysis -----*- C++ -*-===//
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//
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//                     The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_SELECTIONDAGADDRESSANALYSIS_H
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#define LLVM_CODEGEN_SELECTIONDAGADDRESSANALYSIS_H
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#include "llvm/CodeGen/SelectionDAGNodes.h"
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#include <cstdint>
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namespace llvm {
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class SelectionDAG;
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/// Helper struct to parse and store a memory address as base + index + offset.
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/// We ignore sign extensions when it is safe to do so.
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/// The following two expressions are not equivalent. To differentiate we need
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/// to store whether there was a sign extension involved in the index
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/// computation.
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///  (load (i64 add (i64 copyfromreg %c)
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///                 (i64 signextend (add (i8 load %index)
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///                                      (i8 1))))
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/// vs
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///
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/// (load (i64 add (i64 copyfromreg %c)
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///                (i64 signextend (i32 add (i32 signextend (i8 load %index))
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///                                         (i32 1)))))
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class BaseIndexOffset {
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private:
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  SDValue Base;
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  SDValue Index;
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  int64_t Offset = 0;
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  bool IsIndexSignExt = false;
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public:
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13.2M
  BaseIndexOffset() = default;
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  BaseIndexOffset(SDValue Base, SDValue Index, int64_t Offset,
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                  bool IsIndexSignExt)
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      : Base(Base), Index(Index), Offset(Offset),
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55.8M
        IsIndexSignExt(IsIndexSignExt) {}
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  SDValue getBase() { return Base; }
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  SDValue getIndex() { return Index; }
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7.37M
  bool equalBaseIndex(BaseIndexOffset &Other, const SelectionDAG &DAG) {
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7.37M
    int64_t Off;
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7.37M
    return equalBaseIndex(Other, DAG, Off);
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  }
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  bool equalBaseIndex(BaseIndexOffset &Other, const SelectionDAG &DAG,
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                      int64_t &Off);
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  /// Parses tree in Ptr for base, index, offset addresses.
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  static BaseIndexOffset match(LSBaseSDNode *N, const SelectionDAG &DAG);
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};
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} // end namespace llvm
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#endif // LLVM_CODEGEN_SELECTIONDAGADDRESSANALYSIS_H