76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
//===----------------------- 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)
|