| //===----------------------- MIRNamer.cpp - MIR Namer ---------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // The purpose of this pass is to rename virtual register operands with the goal |
| // of making it easier to author easier to read tests for MIR. This pass reuses |
| // the vreg renamer used by MIRCanonicalizerPass. |
| // |
| // Basic Usage: |
| // |
| // llc -o - -run-pass mir-namer example.mir |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "MIRVRegNamerUtils.h" |
| #include "llvm/ADT/PostOrderIterator.h" |
| #include "llvm/CodeGen/MachineFunctionPass.h" |
| #include "llvm/InitializePasses.h" |
| |
| using namespace llvm; |
| |
| namespace llvm { |
| extern char &MIRNamerID; |
| } // namespace llvm |
| |
| #define DEBUG_TYPE "mir-namer" |
| |
| namespace { |
| |
| class MIRNamer : public MachineFunctionPass { |
| public: |
| static char ID; |
| MIRNamer() : MachineFunctionPass(ID) {} |
| |
| StringRef getPassName() const override { |
| return "Rename virtual register operands"; |
| } |
| |
| void getAnalysisUsage(AnalysisUsage &AU) const override { |
| AU.setPreservesCFG(); |
| MachineFunctionPass::getAnalysisUsage(AU); |
| } |
| |
| bool runOnMachineFunction(MachineFunction &MF) override { |
| bool Changed = false; |
| |
| if (MF.empty()) |
| return Changed; |
| |
| VRegRenamer Renamer(MF.getRegInfo()); |
| |
| unsigned BBIndex = 0; |
| ReversePostOrderTraversal<MachineBasicBlock *> RPOT(&*MF.begin()); |
| for (auto &MBB : RPOT) |
| Changed |= Renamer.renameVRegs(MBB, BBIndex++); |
| |
| return Changed; |
| } |
| }; |
| |
| } // end anonymous namespace |
| |
| char MIRNamer::ID; |
| |
| char &llvm::MIRNamerID = MIRNamer::ID; |
| |
| INITIALIZE_PASS_BEGIN(MIRNamer, "mir-namer", "Rename Register Operands", false, |
| false) |
| |
| INITIALIZE_PASS_END(MIRNamer, "mir-namer", "Rename Register Operands", false, |
| false) |