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//===-- InstCount.cpp - Collects the count of all instructions ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This pass collects the count of all instructions and reports them
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "instcount"
#include "llvm/Analysis/Passes.h"
#include "llvm/Pass.h"
#include "llvm/Function.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/InstVisitor.h"
#include "llvm/Support/Streams.h"
#include "llvm/ADT/Statistic.h"
using namespace llvm;
STATISTIC(TotalInsts , "Number of instructions (of all types)");
STATISTIC(TotalBlocks, "Number of basic blocks");
STATISTIC(TotalFuncs , "Number of non-external functions");
STATISTIC(TotalMemInst, "Number of memory instructions");
#define HANDLE_INST(N, OPCODE, CLASS) \
STATISTIC(Num ## OPCODE ## Inst, "Number of " #OPCODE " insts");
#include "llvm/Instruction.def"
namespace {
class VISIBILITY_HIDDEN InstCount
: public FunctionPass, public InstVisitor<InstCount> {
friend class InstVisitor<InstCount>;
void visitFunction (Function &F) { ++TotalFuncs; }
void visitBasicBlock(BasicBlock &BB) { ++TotalBlocks; }
#define HANDLE_INST(N, OPCODE, CLASS) \
void visit##OPCODE(CLASS &) { ++Num##OPCODE##Inst; ++TotalInsts; }
#include "llvm/Instruction.def"
void visitInstruction(Instruction &I) {
cerr << "Instruction Count does not know about " << I;
llvm_unreachable(0);
}
public:
static char ID; // Pass identification, replacement for typeid
InstCount() : FunctionPass(&ID) {}
virtual bool runOnFunction(Function &F);
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
virtual void print(std::ostream &O, const Module *M) const {}
};
}
char InstCount::ID = 0;
static RegisterPass<InstCount>
X("instcount", "Counts the various types of Instructions", false, true);
FunctionPass *llvm::createInstCountPass() { return new InstCount(); }
// InstCount::run - This is the main Analysis entry point for a
// function.
//
bool InstCount::runOnFunction(Function &F) {
unsigned StartMemInsts =
NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
NumInvokeInst + NumAllocaInst + NumMallocInst + NumFreeInst;
visit(F);
unsigned EndMemInsts =
NumGetElementPtrInst + NumLoadInst + NumStoreInst + NumCallInst +
NumInvokeInst + NumAllocaInst + NumMallocInst + NumFreeInst;
TotalMemInst += EndMemInsts-StartMemInsts;
return false;
}
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