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/Analysis/Passes.h"
16#include "llvm/IR/Function.h"
17#include "llvm/IR/InstVisitor.h"
18#include "llvm/Support/Debug.h"
19#include "llvm/Support/ErrorHandling.h"
20#include "llvm/Support/raw_ostream.h"
21using namespace llvm;
22
23#define DEBUG_TYPE "instcount"
24
25STATISTIC(TotalInsts, "Number of instructions (of all types)");
26STATISTIC(TotalBlocks, "Number of basic blocks");
27STATISTIC(TotalFuncs, "Number of non-external functions");
28
29#define HANDLE_INST(N, OPCODE, CLASS) \
30 STATISTIC(Num##OPCODE##Inst, "Number of " #OPCODE " insts");
31
32#include "llvm/IR/Instruction.def"
33
34namespace {
35class InstCount : public InstVisitor<InstCount> {
36 friend class InstVisitor<InstCount>;
37
38 void visitFunction(Function &F) { ++TotalFuncs; }
39 void visitBasicBlock(BasicBlock &BB) { ++TotalBlocks; }
40
41#define HANDLE_INST(N, OPCODE, CLASS) \
42 void visit##OPCODE(CLASS &) { \
43 ++Num##OPCODE##Inst; \
44 ++TotalInsts; \
45 }
46
47#include "llvm/IR/Instruction.def"
48
49 void visitInstruction(Instruction &I) {
50 errs() << "Instruction Count does not know about " << I;
51 llvm_unreachable(nullptr);
52 }
53};
54} // namespace
55
56PreservedAnalyses InstCountPass::run(Function &F,
57 FunctionAnalysisManager &FAM) {
58 LLVM_DEBUG(dbgs() << "INSTCOUNT: running on function " << F.getName()
59 << "\n");
60 InstCount().visit(F);
61
62 return PreservedAnalyses::all();
63}
64