| //===-- InstCount.cpp - Collects the count of all instructions ------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This pass collects the count of all instructions and reports them |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Analysis/InstCount.h" |
| #include "llvm/ADT/Statistic.h" |
| #include "llvm/Analysis/Passes.h" |
| #include "llvm/IR/Function.h" |
| #include "llvm/IR/InstVisitor.h" |
| #include "llvm/InitializePasses.h" |
| #include "llvm/Pass.h" |
| #include "llvm/Support/Debug.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/raw_ostream.h" |
| using namespace llvm; |
| |
| #define DEBUG_TYPE "instcount" |
| |
| STATISTIC(TotalInsts, "Number of instructions (of all types)"); |
| STATISTIC(TotalBlocks, "Number of basic blocks"); |
| STATISTIC(TotalFuncs, "Number of non-external functions"); |
| |
| #define HANDLE_INST(N, OPCODE, CLASS) \ |
| STATISTIC(Num##OPCODE##Inst, "Number of " #OPCODE " insts"); |
| |
| #include "llvm/IR/Instruction.def" |
| |
| namespace { |
| class InstCount : public InstVisitor<InstCount> { |
| friend class InstVisitor<InstCount>; |
| |
| void visitFunction(Function &F) { ++TotalFuncs; } |
| void visitBasicBlock(BasicBlock &BB) { ++TotalBlocks; } |
| |
| #define HANDLE_INST(N, OPCODE, CLASS) \ |
| void visit##OPCODE(CLASS &) { \ |
| ++Num##OPCODE##Inst; \ |
| ++TotalInsts; \ |
| } |
| |
| #include "llvm/IR/Instruction.def" |
| |
| void visitInstruction(Instruction &I) { |
| errs() << "Instruction Count does not know about " << I; |
| llvm_unreachable(nullptr); |
| } |
| }; |
| } // namespace |
| |
| PreservedAnalyses InstCountPass::run(Function &F, |
| FunctionAnalysisManager &FAM) { |
| LLVM_DEBUG(dbgs() << "INSTCOUNT: running on function " << F.getName() |
| << "\n"); |
| InstCount().visit(F); |
| |
| return PreservedAnalyses::all(); |
| } |
| |
| namespace { |
| class InstCountLegacyPass : public FunctionPass { |
| public: |
| static char ID; // Pass identification, replacement for typeid |
| InstCountLegacyPass() : FunctionPass(ID) { |
| initializeInstCountLegacyPassPass(*PassRegistry::getPassRegistry()); |
| } |
| |
| bool runOnFunction(Function &F) override { |
| LLVM_DEBUG(dbgs() << "INSTCOUNT: running on function " << F.getName() |
| << "\n"); |
| InstCount().visit(F); |
| return false; |
| }; |
| |
| void getAnalysisUsage(AnalysisUsage &AU) const override { |
| AU.setPreservesAll(); |
| } |
| |
| void print(raw_ostream &O, const Module *M) const override {} |
| }; |
| } // namespace |
| |
| char InstCountLegacyPass::ID = 0; |
| INITIALIZE_PASS(InstCountLegacyPass, "instcount", |
| "Counts the various types of Instructions", false, true) |
| |
| FunctionPass *llvm::createInstCountPass() { return new InstCountLegacyPass(); } |