//===- BlockProfiling.cpp - Insert counters for block profiling -----------===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
//
// This pass instruments the specified program with counters for basic block or
//
//===----------------------------------------------------------------------===//
-#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
-#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Pass.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Transforms/Instrumentation.h"
+#include "RSProfiling.h"
+#include "ProfilingUtils.h"
+using namespace llvm;
namespace {
- class FunctionProfiler : public Pass {
- bool run(Module &M);
-
- void insertInitializationCall(Function *MainFn, const char *FnName,
- GlobalValue *Array);
+ class VISIBILITY_HIDDEN FunctionProfiler : public RSProfilers_std {
+ public:
+ static char ID;
+ bool runOnModule(Module &M);
};
-
- RegisterOpt<FunctionProfiler> X("insert-function-profiling",
- "Insert instrumentation for function profiling");
}
+char FunctionProfiler::ID = 0;
+
+static RegisterPass<FunctionProfiler>
+X("insert-function-profiling",
+ "Insert instrumentation for function profiling");
+static RegisterAnalysisGroup<RSProfilers> XG(X);
+
+ModulePass *llvm::createFunctionProfilerPass() {
+ return new FunctionProfiler();
+}
-bool FunctionProfiler::run(Module &M) {
- Function *Main = M.getMainFunction();
+bool FunctionProfiler::runOnModule(Module &M) {
+ Function *Main = M.getFunction("main");
if (Main == 0) {
- std::cerr << "WARNING: cannot insert function profiling into a module"
- << " with no main function!\n";
+ errs() << "WARNING: cannot insert function profiling into a module"
+ << " with no main function!\n";
return false; // No main, no instrumentation!
}
unsigned NumFunctions = 0;
- for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
- if (!I->isExternal())
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
+ if (!I->isDeclaration())
++NumFunctions;
- const Type *ATy = ArrayType::get(Type::UIntTy, NumFunctions);
+ const Type *ATy = ArrayType::get(Type::getInt32Ty(M.getContext()),
+ NumFunctions);
GlobalVariable *Counters =
- new GlobalVariable(ATy, false, GlobalValue::InternalLinkage,
- Constant::getNullValue(ATy), "FuncProfCounters", &M);
-
- ConstantPointerRef *CounterCPR = ConstantPointerRef::get(Counters);
- std::vector<Constant*> GEPIndices;
- GEPIndices.resize(2);
- GEPIndices[0] = Constant::getNullValue(Type::LongTy);
+ new GlobalVariable(M, ATy, false, GlobalValue::InternalLinkage,
+ Constant::getNullValue(ATy), "FuncProfCounters");
// Instrument all of the functions...
unsigned i = 0;
- for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
- if (!I->isExternal()) {
- // Insert counter at the start of the function, but after any allocas.
- BasicBlock *Entry = I->begin();
- BasicBlock::iterator InsertPos = Entry->begin();
- while (isa<AllocaInst>(InsertPos)) ++InsertPos;
-
- GEPIndices[1] = ConstantSInt::get(Type::LongTy, i++);
- Constant *ElementPtr =
- ConstantExpr::getGetElementPtr(CounterCPR, GEPIndices);
-
- Value *OldVal = new LoadInst(ElementPtr, "OldFuncCounter", InsertPos);
- Value *NewVal = BinaryOperator::create(Instruction::Add, OldVal,
- ConstantInt::get(Type::UIntTy, 1),
- "NewFuncCounter", InsertPos);
- new StoreInst(NewVal, ElementPtr, InsertPos);
- }
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
+ if (!I->isDeclaration())
+ // Insert counter at the start of the function
+ IncrementCounterInBlock(&I->getEntryBlock(), i++, Counters);
// Add the initialization call to main.
- insertInitializationCall(Main, "llvm_start_func_profiling", Counters);
+ InsertProfilingInitCall(Main, "llvm_start_func_profiling", Counters);
return true;
}
-void FunctionProfiler::insertInitializationCall(Function *MainFn,
- const char *FnName,
- GlobalValue *Array) {
- const Type *ArgVTy = PointerType::get(PointerType::get(Type::SByteTy));
- const Type *UIntPtr = PointerType::get(Type::UIntTy);
- Module &M = *MainFn->getParent();
- Function *InitFn = M.getOrInsertFunction(FnName, Type::VoidTy, Type::IntTy,
- ArgVTy, UIntPtr, Type::UIntTy, 0);
-
- // This could force argc and argv into programs that wouldn't otherwise have
- // them, but instead we just pass null values in.
- std::vector<Value*> Args(4);
- Args[0] = Constant::getNullValue(Type::IntTy);
- Args[1] = Constant::getNullValue(ArgVTy);
-
- /* FIXME: We should pass in the command line arguments here! */
- switch (MainFn->asize()) {
- default:
- case 2:
- case 1:
- case 0:
- break;
+
+namespace {
+ class BlockProfiler : public RSProfilers_std {
+ bool runOnModule(Module &M);
+ public:
+ static char ID;
+ };
+}
+
+char BlockProfiler::ID = 0;
+static RegisterPass<BlockProfiler>
+Y("insert-block-profiling", "Insert instrumentation for block profiling");
+static RegisterAnalysisGroup<RSProfilers> YG(Y);
+
+ModulePass *llvm::createBlockProfilerPass() { return new BlockProfiler(); }
+
+bool BlockProfiler::runOnModule(Module &M) {
+ Function *Main = M.getFunction("main");
+ if (Main == 0) {
+ errs() << "WARNING: cannot insert block profiling into a module"
+ << " with no main function!\n";
+ return false; // No main, no instrumentation!
}
- ConstantPointerRef *ArrayCPR = ConstantPointerRef::get(Array);
- std::vector<Constant*> GEPIndices(2, Constant::getNullValue(Type::LongTy));
- Args[2] = ConstantExpr::getGetElementPtr(ArrayCPR, GEPIndices);
-
- unsigned NumElements =
- cast<ArrayType>(Array->getType()->getElementType())->getNumElements();
- Args[3] = ConstantUInt::get(Type::UIntTy, NumElements);
-
- // Skip over any allocas in the entry block.
- BasicBlock *Entry = MainFn->begin();
- BasicBlock::iterator InsertPos = Entry->begin();
- while (isa<AllocaInst>(InsertPos)) ++InsertPos;
-
- new CallInst(InitFn, Args, "", InsertPos);
+ unsigned NumBlocks = 0;
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
+ if (!I->isDeclaration())
+ NumBlocks += I->size();
+
+ const Type *ATy = ArrayType::get(Type::getInt32Ty(M.getContext()), NumBlocks);
+ GlobalVariable *Counters =
+ new GlobalVariable(M, ATy, false, GlobalValue::InternalLinkage,
+ Constant::getNullValue(ATy), "BlockProfCounters");
+
+ // Instrument all of the blocks...
+ unsigned i = 0;
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
+ if (I->isDeclaration()) continue;
+ for (Function::iterator BB = I->begin(), E = I->end(); BB != E; ++BB)
+ // Insert counter at the start of the block
+ IncrementCounterInBlock(BB, i++, Counters);
+ }
+
+ // Add the initialization call to main.
+ InsertProfilingInitCall(Main, "llvm_start_block_profiling", Counters);
+ return true;
}
+
projects / oota-llvm.git / blobdiff