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/Debug.h" 19 #include "llvm/Support/ErrorHandling.h" 20 #include "llvm/Support/InstVisitor.h" 21 #include "llvm/Support/raw_ostream.h" 22 #include "llvm/ADT/Statistic.h" 23 using namespace llvm; 24 25 STATISTIC(TotalInsts , "Number of instructions (of all types)"); 26 STATISTIC(TotalBlocks, "Number of basic blocks"); 27 STATISTIC(TotalFuncs , "Number of non-external functions"); 28 STATISTIC(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 36 namespace { 37 class InstCount : public FunctionPass, public InstVisitor<InstCount> { 38 friend class InstVisitor<InstCount>; 39 40 void visitFunction (Function &F) { ++TotalFuncs; } 41 void visitBasicBlock(BasicBlock &BB) { ++TotalBlocks; } 42 43 #define HANDLE_INST(N, OPCODE, CLASS) \ 44 void visit##OPCODE(CLASS &) { ++Num##OPCODE##Inst; ++TotalInsts; } 45 46 #include "llvm/Instruction.def" 47 48 void visitInstruction(Instruction &I) { 49 errs() << "Instruction Count does not know about " << I; 50 llvm_unreachable(0); 51 } 52 public: 53 static char ID; // Pass identification, replacement for typeid 54 InstCount() : FunctionPass(ID) { 55 initializeInstCountPass(*PassRegistry::getPassRegistry()); 56 } 57 58 virtual bool runOnFunction(Function &F); 59 60 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 61 AU.setPreservesAll(); 62 } 63 virtual void print(raw_ostream &O, const Module *M) const {} 64 65 }; 66 } 67 68 char InstCount::ID = 0; 69 INITIALIZE_PASS(InstCount, "instcount", 70 "Counts the various types of Instructions", false, true) 71 72 FunctionPass *llvm::createInstCountPass() { return new InstCount(); } 73 74 // InstCount::run - This is the main Analysis entry point for a 75 // function. 76 // 77 bool InstCount::runOnFunction(Function &F) { 78 unsigned StartMemInsts = 79 NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst + 80 NumInvokeInst + NumAllocaInst; 81 visit(F); 82 unsigned EndMemInsts = 83 NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst + 84 NumInvokeInst + NumAllocaInst; 85 TotalMemInst += EndMemInsts-StartMemInsts; 86 return false; 87 } 88
