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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
//===- LiveDebugVariables.h - Tracking debug info variables -----*- 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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//
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// This file provides the interface to the LiveDebugVariables analysis.
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//
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// The analysis removes DBG_VALUE instructions for virtual registers and tracks
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// live user variables in a data structure that can be updated during register
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// allocation.
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//
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// After register allocation new DBG_VALUE instructions are emitted to reflect
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// the new locations of user variables.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_LIVEDEBUGVARIABLES_H
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#define LLVM_LIB_CODEGEN_LIVEDEBUGVARIABLES_H
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/Support/Compiler.h"
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namespace llvm {
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template <typename T> class ArrayRef;
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class LiveIntervals;
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class VirtRegMap;
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class LLVM_LIBRARY_VISIBILITY LiveDebugVariables : public MachineFunctionPass {
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void *pImpl = nullptr;
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public:
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static char ID; // Pass identification, replacement for typeid
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LiveDebugVariables();
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~LiveDebugVariables() override;
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/// splitRegister - Move any user variables in OldReg to the live ranges in
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/// NewRegs where they are live. Mark the values as unavailable where no new
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/// register is live.
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void splitRegister(unsigned OldReg, ArrayRef<unsigned> NewRegs,
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LiveIntervals &LIS);
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/// emitDebugValues - Emit new DBG_VALUE instructions reflecting the changes
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/// that happened during register allocation.
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/// @param VRM Rename virtual registers according to map.
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void emitDebugValues(VirtRegMap *VRM);
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/// dump - Print data structures to dbgs().
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void dump() const;
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private:
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bool runOnMachineFunction(MachineFunction &) override;
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void releaseMemory() override;
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void getAnalysisUsage(AnalysisUsage &) const override;
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bool doInitialization(Module &) override;
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};
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} // end namespace llvm
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#endif // LLVM_LIB_CODEGEN_LIVEDEBUGVARIABLES_H
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