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//===-- 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(); }
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