mirror of
https://github.com/RPCSX/llvm.git
synced 2024-11-30 07:00:45 +00:00
Refactor code, initial implementation of -insert-block-profiling pass
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9593 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
05b958d363
commit
942457564d
@ -25,70 +25,8 @@
|
||||
#include "llvm/Module.h"
|
||||
#include "llvm/Pass.h"
|
||||
|
||||
namespace {
|
||||
class FunctionProfiler : public Pass {
|
||||
bool run(Module &M);
|
||||
|
||||
void insertInitializationCall(Function *MainFn, const char *FnName,
|
||||
GlobalValue *Array);
|
||||
};
|
||||
|
||||
RegisterOpt<FunctionProfiler> X("insert-function-profiling",
|
||||
"Insert instrumentation for function profiling");
|
||||
}
|
||||
|
||||
|
||||
bool FunctionProfiler::run(Module &M) {
|
||||
Function *Main = M.getMainFunction();
|
||||
if (Main == 0) {
|
||||
std::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())
|
||||
++NumFunctions;
|
||||
|
||||
const Type *ATy = ArrayType::get(Type::UIntTy, 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);
|
||||
|
||||
// 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);
|
||||
}
|
||||
|
||||
// Add the initialization call to main.
|
||||
insertInitializationCall(Main, "llvm_start_func_profiling", Counters);
|
||||
return true;
|
||||
}
|
||||
|
||||
void FunctionProfiler::insertInitializationCall(Function *MainFn,
|
||||
const char *FnName,
|
||||
GlobalValue *Array) {
|
||||
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();
|
||||
@ -139,3 +77,107 @@ void FunctionProfiler::insertInitializationCall(Function *MainFn,
|
||||
|
||||
new CallInst(InitFn, Args, "", InsertPos);
|
||||
}
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
|
||||
namespace {
|
||||
class FunctionProfiler : public Pass {
|
||||
bool run(Module &M);
|
||||
};
|
||||
|
||||
RegisterOpt<FunctionProfiler> X("insert-function-profiling",
|
||||
"Insert instrumentation for function profiling");
|
||||
}
|
||||
|
||||
bool FunctionProfiler::run(Module &M) {
|
||||
Function *Main = M.getMainFunction();
|
||||
if (Main == 0) {
|
||||
std::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())
|
||||
++NumFunctions;
|
||||
|
||||
const Type *ATy = ArrayType::get(Type::UIntTy, 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())
|
||||
// Insert counter at the start of the function
|
||||
IncrementCounterInBlock(I->begin(), i++, CounterCPR);
|
||||
|
||||
// Add the initialization call to main.
|
||||
insertInitializationCall(Main, "llvm_start_func_profiling", Counters);
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
namespace {
|
||||
class BlockProfiler : public Pass {
|
||||
bool run(Module &M);
|
||||
};
|
||||
|
||||
RegisterOpt<BlockProfiler> Y("insert-block-profiling",
|
||||
"Insert instrumentation for block profiling");
|
||||
}
|
||||
|
||||
bool BlockProfiler::run(Module &M) {
|
||||
Function *Main = M.getMainFunction();
|
||||
if (Main == 0) {
|
||||
std::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)
|
||||
NumBlocks += I->size();
|
||||
|
||||
const Type *ATy = ArrayType::get(Type::UIntTy, 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 (Function::iterator BB = I->begin(), E = I->end(); BB != E; ++BB)
|
||||
// Insert counter at the start of the block
|
||||
IncrementCounterInBlock(BB, i++, CounterCPR);
|
||||
|
||||
// Add the initialization call to main.
|
||||
insertInitializationCall(Main, "llvm_start_block_profiling", Counters);
|
||||
return true;
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user