1 //===----------------------- MIRNamer.cpp - MIR Namer ---------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // The purpose of this pass is to rename virtual register operands with the goal
10 // of making it easier to author easier to read tests for MIR. This pass reuses
11 // the vreg renamer used by MIRCanonicalizerPass.
15 // llc -o - -run-pass mir-namer example.mir
17 //===----------------------------------------------------------------------===//
19 #include "MIRVRegNamerUtils.h"
20 #include "llvm/ADT/PostOrderIterator.h"
21 #include "llvm/ADT/STLExtras.h"
22 #include "llvm/CodeGen/MachineFunctionPass.h"
23 #include "llvm/CodeGen/MachineInstrBuilder.h"
24 #include "llvm/CodeGen/MachineRegisterInfo.h"
25 #include "llvm/CodeGen/Passes.h"
30 extern char &MIRNamerID;
33 #define DEBUG_TYPE "mir-namer"
37 class MIRNamer : public MachineFunctionPass {
40 MIRNamer() : MachineFunctionPass(ID) {}
42 StringRef getPassName() const override {
43 return "Rename virtual register operands";
46 void getAnalysisUsage(AnalysisUsage &AU) const override {
48 MachineFunctionPass::getAnalysisUsage(AU);
51 bool runOnMachineFunction(MachineFunction &MF) override {
57 NamedVRegCursor NVC(MF.getRegInfo());
59 ReversePostOrderTraversal<MachineBasicBlock *> RPOT(&*MF.begin());
60 for (auto &MBB : RPOT)
61 Changed |= NVC.renameVRegs(MBB);
67 } // end anonymous namespace
71 char &llvm::MIRNamerID = MIRNamer::ID;
73 INITIALIZE_PASS_BEGIN(MIRNamer, "mir-namer", "Rename Register Operands", false,
76 INITIALIZE_PASS_END(MIRNamer, "mir-namer", "Rename Register Operands", false,