05da2fe521
This file lists every pass in LLVM, and is included by Pass.h, which is very popular. Every time we add, remove, or rename a pass in LLVM, it caused lots of recompilation. I found this fact by looking at this table, which is sorted by the number of times a file was changed over the last 100,000 git commits multiplied by the number of object files that depend on it in the current checkout: recompiles touches affected_files header 342380 95 3604 llvm/include/llvm/ADT/STLExtras.h 314730 234 1345 llvm/include/llvm/InitializePasses.h 307036 118 2602 llvm/include/llvm/ADT/APInt.h 213049 59 3611 llvm/include/llvm/Support/MathExtras.h 170422 47 3626 llvm/include/llvm/Support/Compiler.h 162225 45 3605 llvm/include/llvm/ADT/Optional.h 158319 63 2513 llvm/include/llvm/ADT/Triple.h 140322 39 3598 llvm/include/llvm/ADT/StringRef.h 137647 59 2333 llvm/include/llvm/Support/Error.h 131619 73 1803 llvm/include/llvm/Support/FileSystem.h Before this change, touching InitializePasses.h would cause 1345 files to recompile. After this change, touching it only causes 550 compiles in an incremental rebuild. Reviewers: bkramer, asbirlea, bollu, jdoerfert Differential Revision: https://reviews.llvm.org/D70211
79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
//===----------------------- MIRNamer.cpp - MIR Namer ---------------------===//
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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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// The purpose of this pass is to rename virtual register operands with the goal
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// of making it easier to author easier to read tests for MIR. This pass reuses
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// the vreg renamer used by MIRCanonicalizerPass.
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//
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// Basic Usage:
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//
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// llc -o - -run-pass mir-namer example.mir
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//
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//===----------------------------------------------------------------------===//
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#include "MIRVRegNamerUtils.h"
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#include "llvm/ADT/PostOrderIterator.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/InitializePasses.h"
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using namespace llvm;
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namespace llvm {
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extern char &MIRNamerID;
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} // namespace llvm
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#define DEBUG_TYPE "mir-namer"
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namespace {
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class MIRNamer : public MachineFunctionPass {
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public:
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static char ID;
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MIRNamer() : MachineFunctionPass(ID) {}
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StringRef getPassName() const override {
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return "Rename virtual register operands";
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesCFG();
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MachineFunctionPass::getAnalysisUsage(AU);
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}
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bool runOnMachineFunction(MachineFunction &MF) override {
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bool Changed = false;
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if (MF.empty())
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return Changed;
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NamedVRegCursor NVC(MF.getRegInfo());
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ReversePostOrderTraversal<MachineBasicBlock *> RPOT(&*MF.begin());
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for (auto &MBB : RPOT)
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Changed |= NVC.renameVRegs(MBB);
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return Changed;
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}
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};
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} // end anonymous namespace
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char MIRNamer::ID;
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char &llvm::MIRNamerID = MIRNamer::ID;
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INITIALIZE_PASS_BEGIN(MIRNamer, "mir-namer", "Rename Register Operands", false,
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false)
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INITIALIZE_PASS_END(MIRNamer, "mir-namer", "Rename Register Operands", false,
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false)
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