//===- 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/Streams.h"
+#include "llvm/Transforms/Instrumentation.h"
+#include "RSProfiling.h"
+#include "ProfilingUtils.h"
using namespace llvm;
-static void 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);
-
- // Skip over any allocas in the entry block.
- BasicBlock *Entry = MainFn->begin();
- BasicBlock::iterator InsertPos = Entry->begin();
- while (isa<AllocaInst>(InsertPos)) ++InsertPos;
-
- Function::aiterator AI;
- switch (MainFn->asize()) {
- default:
- case 2:
- AI = MainFn->abegin(); ++AI;
- if (AI->getType() != ArgVTy) {
- Args[1] = new CastInst(AI, ArgVTy, "argv.cast", InsertPos);
- } else {
- Args[1] = AI;
- }
-
- case 1:
- AI = MainFn->abegin();
- if (AI->getType() != Type::IntTy) {
- Args[0] = new CastInst(AI, Type::IntTy, "argc.cast", InsertPos);
- } else {
- Args[0] = AI;
- }
-
- case 0:
- break;
- }
-
- 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);
-
- new CallInst(InitFn, Args, "", InsertPos);
+namespace {
+ class VISIBILITY_HIDDEN FunctionProfiler : public RSProfilers_std {
+ public:
+ static char ID;
+ bool runOnModule(Module &M);
+ };
}
-static void IncrementCounterInBlock(BasicBlock *BB, unsigned CounterNum,
- ConstantPointerRef *CounterArray) {
- // Insert the increment after any alloca or PHI instructions...
- BasicBlock::iterator InsertPos = BB->begin();
- while (isa<AllocaInst>(InsertPos) || isa<PHINode>(InsertPos))
- ++InsertPos;
-
- // Create the getelementptr constant expression
- std::vector<Constant*> Indices(2);
- Indices[0] = Constant::getNullValue(Type::LongTy);
- Indices[1] = ConstantSInt::get(Type::LongTy, CounterNum);
- Constant *ElementPtr = ConstantExpr::getGetElementPtr(CounterArray, Indices);
-
- // Load, increment and store the value back.
- 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);
-}
+char FunctionProfiler::ID = 0;
+static RegisterPass<FunctionProfiler>
+X("insert-function-profiling",
+ "Insert instrumentation for function profiling");
+static RegisterAnalysisGroup<RSProfilers> XG(X);
-namespace {
- class FunctionProfiler : public Pass {
- bool run(Module &M);
- };
-
- RegisterOpt<FunctionProfiler> X("insert-function-profiling",
- "Insert instrumentation for function profiling");
+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";
+ cerr << "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::Int32Ty, NumFunctions);
GlobalVariable *Counters =
new GlobalVariable(ATy, false, GlobalValue::InternalLinkage,
Constant::getNullValue(ATy), "FuncProfCounters", &M);
- ConstantPointerRef *CounterCPR = ConstantPointerRef::get(Counters);
-
// Instrument all of the functions...
unsigned i = 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())
// Insert counter at the start of the function
- IncrementCounterInBlock(I->begin(), i++, CounterCPR);
+ IncrementCounterInBlock(I->begin(), i++, Counters);
// Add the initialization call to main.
- insertInitializationCall(Main, "llvm_start_func_profiling", Counters);
+ InsertProfilingInitCall(Main, "llvm_start_func_profiling", Counters);
return true;
}
namespace {
- class BlockProfiler : public Pass {
- bool run(Module &M);
+ class BlockProfiler : public RSProfilers_std {
+ bool runOnModule(Module &M);
+ public:
+ static char ID;
};
-
- RegisterOpt<BlockProfiler> Y("insert-block-profiling",
- "Insert instrumentation for block profiling");
}
-bool BlockProfiler::run(Module &M) {
- Function *Main = M.getMainFunction();
+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) {
- std::cerr << "WARNING: cannot insert block profiling into a module"
- << " with no main function!\n";
+ cerr << "WARNING: cannot insert block profiling into a module"
+ << " with no main function!\n";
return false; // No main, no instrumentation!
}
unsigned NumBlocks = 0;
- for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
NumBlocks += I->size();
- const Type *ATy = ArrayType::get(Type::UIntTy, NumBlocks);
+ const Type *ATy = ArrayType::get(Type::Int32Ty, NumBlocks);
GlobalVariable *Counters =
new GlobalVariable(ATy, false, GlobalValue::InternalLinkage,
Constant::getNullValue(ATy), "BlockProfCounters", &M);
- ConstantPointerRef *CounterCPR = ConstantPointerRef::get(Counters);
-
// Instrument all of the blocks...
unsigned i = 0;
- for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
for (Function::iterator BB = I->begin(), E = I->end(); BB != E; ++BB)
// Insert counter at the start of the block
- IncrementCounterInBlock(BB, i++, CounterCPR);
+ IncrementCounterInBlock(BB, i++, Counters);
// Add the initialization call to main.
- insertInitializationCall(Main, "llvm_start_block_profiling", Counters);
+ InsertProfilingInitCall(Main, "llvm_start_block_profiling", Counters);
return true;
}
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