LCOV - code coverage report
Current view: top level - include/llvm/Transforms/Utils - OrderedInstructions.h (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 2 2 100.0 %
Date: 2017-09-14 15:23:50 Functions: 0 0 -
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===- llvm/Transforms/Utils/OrderedInstructions.h -------------*- C++ -*-===//
       2             : //
       3             : //                     The LLVM Compiler Infrastructure
       4             : //
       5             : // This file is distributed under the University of Illinois Open Source
       6             : // License. See LICENSE.TXT for details.
       7             : //
       8             : //===----------------------------------------------------------------------===//
       9             : //
      10             : // This file defines an efficient way to check for dominance relation between 2
      11             : // instructions.
      12             : //
      13             : // This interface dispatches to appropriate dominance check given 2
      14             : // instructions, i.e. in case the instructions are in the same basic block,
      15             : // OrderedBasicBlock (with instruction numbering and caching) are used.
      16             : // Otherwise, dominator tree is used.
      17             : //
      18             : //===----------------------------------------------------------------------===//
      19             : 
      20             : #ifndef LLVM_TRANSFORMS_UTILS_ORDEREDINSTRUCTIONS_H
      21             : #define LLVM_TRANSFORMS_UTILS_ORDEREDINSTRUCTIONS_H
      22             : 
      23             : #include "llvm/ADT/DenseMap.h"
      24             : #include "llvm/Analysis/OrderedBasicBlock.h"
      25             : #include "llvm/IR/Dominators.h"
      26             : #include "llvm/IR/Operator.h"
      27             : 
      28             : namespace llvm {
      29             : 
      30         680 : class OrderedInstructions {
      31             :   /// Used to check dominance for instructions in same basic block.
      32             :   mutable DenseMap<const BasicBlock *, std::unique_ptr<OrderedBasicBlock>>
      33             :       OBBMap;
      34             : 
      35             :   /// The dominator tree of the parent function.
      36             :   DominatorTree *DT;
      37             : 
      38             : public:
      39             :   /// Constructor.
      40         680 :   OrderedInstructions(DominatorTree *DT) : DT(DT) {}
      41             : 
      42             :   /// Return true if first instruction dominates the second.
      43             :   bool dominates(const Instruction *, const Instruction *) const;
      44             : 
      45             :   /// Invalidate the OrderedBasicBlock cache when its basic block changes.
      46             :   /// i.e. If an instruction is deleted or added to the basic block, the user
      47             :   /// should call this function to invalidate the OrderedBasicBlock cache for
      48             :   /// this basic block.
      49             :   void invalidateBlock(const BasicBlock *BB) { OBBMap.erase(BB); }
      50             : };
      51             : 
      52             : } // end namespace llvm
      53             : 
      54             : #endif // LLVM_TRANSFORMS_UTILS_ORDEREDINSTRUCTIONS_H

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