Coverage Report

Created: 2019-02-21 13:17

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/CodeGen/RegisterUsageInfo.h
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//==- RegisterUsageInfo.h - Register Usage Informartion Storage --*- C++ -*-==//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This pass is required to take advantage of the interprocedural register
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/// allocation infrastructure.
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///
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/// This pass is simple immutable pass which keeps RegMasks (calculated based on
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/// actual register allocation) for functions in a module and provides simple
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/// API to query this information.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_PHYSICALREGISTERUSAGEINFO_H
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#define LLVM_CODEGEN_PHYSICALREGISTERUSAGEINFO_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/Pass.h"
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#include <cstdint>
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#include <vector>
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namespace llvm {
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class Function;
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class LLVMTargetMachine;
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class PhysicalRegisterUsageInfo : public ImmutablePass {
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public:
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  static char ID;
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  PhysicalRegisterUsageInfo() : ImmutablePass(ID) {
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    PassRegistry &Registry = *PassRegistry::getPassRegistry();
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    initializePhysicalRegisterUsageInfoPass(Registry);
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  }
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  /// Set TargetMachine which is used to print analysis.
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  void setTargetMachine(const LLVMTargetMachine &TM);
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  bool doInitialization(Module &M) override;
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  bool doFinalization(Module &M) override;
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  /// To store RegMask for given Function *.
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  void storeUpdateRegUsageInfo(const Function &FP,
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                               ArrayRef<uint32_t> RegMask);
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  /// To query stored RegMask for given Function *, it will returns ane empty
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  /// array if function is not known.
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  ArrayRef<uint32_t> getRegUsageInfo(const Function &FP);
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  void print(raw_ostream &OS, const Module *M = nullptr) const override;
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private:
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  /// A Dense map from Function * to RegMask.
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  /// In RegMask 0 means register used (clobbered) by function.
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  /// and 1 means content of register will be preserved around function call.
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  DenseMap<const Function *, std::vector<uint32_t>> RegMasks;
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  const LLVMTargetMachine *TM;
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};
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} // end namespace llvm
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#endif // LLVM_CODEGEN_PHYSICALREGISTERUSAGEINFO_H