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must be called in the pass's constructor. This function uses static dependency declarations to recursively initialize the pass's dependencies. Clients that only create passes through the createFooPass() APIs will require no changes. Clients that want to use the CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h before parsing commandline arguments. I have tested this with all standard configurations of clang and llvm-gcc on Darwin. It is possible that there are problems with the static dependencies that will only be visible with non-standard options. If you encounter any crash in pass registration/creation, please send the testcase to me directly. llvm-svn: 116820
88 lines
2.7 KiB
C++
88 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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#define DEBUG_TYPE "instcount"
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#include "llvm/Analysis/Passes.h"
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#include "llvm/Pass.h"
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#include "llvm/Function.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/InstVisitor.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/ADT/Statistic.h"
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using namespace llvm;
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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/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/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(0);
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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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virtual bool runOnFunction(Function &F);
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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virtual void print(raw_ostream &O, const Module *M) const {}
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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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