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"
26 #include "llvm/InitializePasses.h"
31 extern char &MIRNamerID;
34 #define DEBUG_TYPE "mir-namer"
38 class MIRNamer : public MachineFunctionPass {
41 MIRNamer() : MachineFunctionPass(ID) {}
43 StringRef getPassName() const override {
44 return "Rename virtual register operands";
47 void getAnalysisUsage(AnalysisUsage &AU) const override {
49 MachineFunctionPass::getAnalysisUsage(AU);
52 bool runOnMachineFunction(MachineFunction &MF) override {
58 VRegRenamer Renamer(MF.getRegInfo());
61 ReversePostOrderTraversal<MachineBasicBlock *> RPOT(&*MF.begin());
62 for (auto &MBB : RPOT)
63 Changed |= Renamer.renameVRegs(MBB, BBIndex++);
69 } // end anonymous namespace
73 char &llvm::MIRNamerID = MIRNamer::ID;
75 INITIALIZE_PASS_BEGIN(MIRNamer, "mir-namer", "Rename Register Operands", false,
78 INITIALIZE_PASS_END(MIRNamer, "mir-namer", "Rename Register Operands", false,