InstCount.cpp revision 844731a7f1909f55935e3514c9e713a62d67662e
1//===-- InstCount.cpp - Collects the count of all instructions ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This pass collects the count of all instructions and reports them 11// 12//===----------------------------------------------------------------------===// 13 14#define DEBUG_TYPE "instcount" 15#include "llvm/Analysis/Passes.h" 16#include "llvm/Pass.h" 17#include "llvm/Function.h" 18#include "llvm/Support/Compiler.h" 19#include "llvm/Support/InstVisitor.h" 20#include "llvm/Support/Streams.h" 21#include "llvm/ADT/Statistic.h" 22#include <ostream> 23using namespace llvm; 24 25STATISTIC(TotalInsts , "Number of instructions (of all types)"); 26STATISTIC(TotalBlocks, "Number of basic blocks"); 27STATISTIC(TotalFuncs , "Number of non-external functions"); 28STATISTIC(TotalMemInst, "Number of memory instructions"); 29 30#define HANDLE_INST(N, OPCODE, CLASS) \ 31 STATISTIC(Num ## OPCODE ## Inst, "Number of " #OPCODE " insts"); 32 33#include "llvm/Instruction.def" 34 35 36namespace { 37 class VISIBILITY_HIDDEN InstCount 38 : public FunctionPass, public InstVisitor<InstCount> { 39 friend class InstVisitor<InstCount>; 40 41 void visitFunction (Function &F) { ++TotalFuncs; } 42 void visitBasicBlock(BasicBlock &BB) { ++TotalBlocks; } 43 44#define HANDLE_INST(N, OPCODE, CLASS) \ 45 void visit##OPCODE(CLASS &) { ++Num##OPCODE##Inst; ++TotalInsts; } 46 47#include "llvm/Instruction.def" 48 49 void visitInstruction(Instruction &I) { 50 cerr << "Instruction Count does not know about " << I; 51 abort(); 52 } 53 public: 54 static char ID; // Pass identification, replacement for typeid 55 InstCount() : FunctionPass((intptr_t)&ID) {} 56 57 virtual bool runOnFunction(Function &F); 58 59 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 60 AU.setPreservesAll(); 61 } 62 virtual void print(std::ostream &O, const Module *M) const {} 63 64 }; 65} 66 67char InstCount::ID = 0; 68static RegisterPass<InstCount> 69X("instcount", "Counts the various types of Instructions", false, true); 70 71FunctionPass *llvm::createInstCountPass() { return new InstCount(); } 72 73// InstCount::run - This is the main Analysis entry point for a 74// function. 75// 76bool InstCount::runOnFunction(Function &F) { 77 unsigned StartMemInsts = 78 NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst + 79 NumInvokeInst + NumAllocaInst + NumMallocInst + NumFreeInst; 80 visit(F); 81 unsigned EndMemInsts = 82 NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst + 83 NumInvokeInst + NumAllocaInst + NumMallocInst + NumFreeInst; 84 TotalMemInst += EndMemInsts-StartMemInsts; 85 return false; 86} 87