1 //===-- InstCount.cpp - Collects the count of all instructions ------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This pass collects the count of all instructions and reports them
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Analysis/Passes.h"
15 #include "llvm/ADT/Statistic.h"
16 #include "llvm/IR/Function.h"
17 #include "llvm/IR/InstVisitor.h"
18 #include "llvm/Pass.h"
19 #include "llvm/Support/Debug.h"
20 #include "llvm/Support/ErrorHandling.h"
21 #include "llvm/Support/raw_ostream.h"
24 #define DEBUG_TYPE "instcount"
26 STATISTIC(TotalInsts , "Number of instructions (of all types)");
27 STATISTIC(TotalBlocks, "Number of basic blocks");
28 STATISTIC(TotalFuncs , "Number of non-external functions");
29 STATISTIC(TotalMemInst, "Number of memory instructions");
31 #define HANDLE_INST(N, OPCODE, CLASS) \
32 STATISTIC(Num ## OPCODE ## Inst, "Number of " #OPCODE " insts");
34 #include "llvm/IR/Instruction.def"
38 class InstCount : public FunctionPass, public InstVisitor<InstCount> {
39 friend class InstVisitor<InstCount>;
41 void visitFunction (Function &F) { ++TotalFuncs; }
42 void visitBasicBlock(BasicBlock &BB) { ++TotalBlocks; }
44 #define HANDLE_INST(N, OPCODE, CLASS) \
45 void visit##OPCODE(CLASS &) { ++Num##OPCODE##Inst; ++TotalInsts; }
47 #include "llvm/IR/Instruction.def"
49 void visitInstruction(Instruction &I) {
50 errs() << "Instruction Count does not know about " << I;
51 llvm_unreachable(nullptr);
54 static char ID; // Pass identification, replacement for typeid
55 InstCount() : FunctionPass(ID) {
56 initializeInstCountPass(*PassRegistry::getPassRegistry());
59 bool runOnFunction(Function &F) override;
61 void getAnalysisUsage(AnalysisUsage &AU) const override {
64 void print(raw_ostream &O, const Module *M) const override {}
69 char InstCount::ID = 0;
70 INITIALIZE_PASS(InstCount, "instcount",
71 "Counts the various types of Instructions", false, true)
73 FunctionPass *llvm::createInstCountPass() { return new InstCount(); }
75 // InstCount::run - This is the main Analysis entry point for a
78 bool InstCount::runOnFunction(Function &F) {
79 unsigned StartMemInsts =
80 NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
81 NumInvokeInst + NumAllocaInst;
83 unsigned EndMemInsts =
84 NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
85 NumInvokeInst + NumAllocaInst;
86 TotalMemInst += EndMemInsts-StartMemInsts;