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-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This pass collects the count of all instructions and reports them
10//
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} // namespace
54
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