1 //===-- InstCount.cpp - Collects the count of all instructions ------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This pass collects the count of all instructions and reports them
12 //===----------------------------------------------------------------------===//
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"
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");
30 #define HANDLE_INST(N, OPCODE, CLASS) \
31 STATISTIC(Num ## OPCODE ## Inst, "Number of " #OPCODE " insts");
33 #include "llvm/Instruction.def"
37 class VISIBILITY_HIDDEN InstCount
38 : 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/Instruction.def"
49 void visitInstruction(Instruction &I) {
50 cerr << "Instruction Count does not know about " << I;
54 virtual bool runOnFunction(Function &F);
56 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
59 virtual void print(std::ostream &O, const Module *M) const {}
63 RegisterPass<InstCount> X("instcount",
64 "Counts the various types of Instructions");
67 FunctionPass *llvm::createInstCountPass() { return new InstCount(); }
69 // InstCount::run - This is the main Analysis entry point for a
72 bool InstCount::runOnFunction(Function &F) {
73 unsigned StartMemInsts =
74 NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
75 NumInvokeInst + NumAllocaInst + NumMallocInst + NumFreeInst;
77 unsigned EndMemInsts =
78 NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
79 NumInvokeInst + NumAllocaInst + NumMallocInst + NumFreeInst;
80 TotalMemInst += EndMemInsts-StartMemInsts;