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