63 lines · cpp
1//===-- InstCount.cpp - Collects the count of all instructions ------------===//2//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-exception6//7//===----------------------------------------------------------------------===//8//9// This pass collects the count of all instructions and reports them10//11//===----------------------------------------------------------------------===//12 13#include "llvm/Analysis/InstCount.h"14#include "llvm/ADT/Statistic.h"15#include "llvm/IR/Function.h"16#include "llvm/IR/InstVisitor.h"17#include "llvm/Support/Debug.h"18#include "llvm/Support/ErrorHandling.h"19#include "llvm/Support/raw_ostream.h"20using namespace llvm;21 22#define DEBUG_TYPE "instcount"23 24STATISTIC(TotalInsts, "Number of instructions (of all types)");25STATISTIC(TotalBlocks, "Number of basic blocks");26STATISTIC(TotalFuncs, "Number of non-external functions");27 28#define HANDLE_INST(N, OPCODE, CLASS) \29 STATISTIC(Num##OPCODE##Inst, "Number of " #OPCODE " insts");30 31#include "llvm/IR/Instruction.def"32 33namespace {34class InstCount : public InstVisitor<InstCount> {35 friend class InstVisitor<InstCount>;36 37 void visitFunction(Function &F) { ++TotalFuncs; }38 void visitBasicBlock(BasicBlock &BB) { ++TotalBlocks; }39 40#define HANDLE_INST(N, OPCODE, CLASS) \41 void visit##OPCODE(CLASS &) { \42 ++Num##OPCODE##Inst; \43 ++TotalInsts; \44 }45 46#include "llvm/IR/Instruction.def"47 48 void visitInstruction(Instruction &I) {49 errs() << "Instruction Count does not know about " << I;50 llvm_unreachable(nullptr);51 }52};53} // namespace54 55PreservedAnalyses InstCountPass::run(Function &F,56 FunctionAnalysisManager &FAM) {57 LLVM_DEBUG(dbgs() << "INSTCOUNT: running on function " << F.getName()58 << "\n");59 InstCount().visit(F);60 61 return PreservedAnalyses::all();62}63