Function* Create(const STREAMOUT_COMPILE_STATE& state)
{
static std::size_t soNum = 0;
std::stringstream fnName("SOShader", std::ios_base::in | std::ios_base::out | std::ios_base::ate);
fnName << soNum++;
// SO function signature
// typedef void(__cdecl *PFN_SO_FUNC)(SWR_STREAMOUT_CONTEXT*)
std::vector<Type*> args{
PointerType::get(Gen_SWR_STREAMOUT_CONTEXT(JM()), 0), // SWR_STREAMOUT_CONTEXT*
};
FunctionType* fTy = FunctionType::get(IRB()->getVoidTy(), args, false);
Function* soFunc = Function::Create(fTy, GlobalValue::ExternalLinkage, fnName.str(), JM()->mpCurrentModule);
// create return basic block
BasicBlock* entry = BasicBlock::Create(JM()->mContext, "entry", soFunc);
BasicBlock* returnBB = BasicBlock::Create(JM()->mContext, "return", soFunc);
IRB()->SetInsertPoint(entry);
// arguments
auto argitr = soFunc->getArgumentList().begin();
Value* pSoCtx = &*argitr++;
pSoCtx->setName("pSoCtx");
const STREAMOUT_STREAM& streamState = state.stream;
buildStream(state, streamState, pSoCtx, returnBB, soFunc);
BR(returnBB);
IRB()->SetInsertPoint(returnBB);
RET_VOID();
JitManager::DumpToFile(soFunc, "SoFunc");
::FunctionPassManager passes(JM()->mpCurrentModule);
passes.add(createBreakCriticalEdgesPass());
passes.add(createCFGSimplificationPass());
passes.add(createEarlyCSEPass());
passes.add(createPromoteMemoryToRegisterPass());
passes.add(createCFGSimplificationPass());
passes.add(createEarlyCSEPass());
passes.add(createInstructionCombiningPass());
passes.add(createInstructionSimplifierPass());
passes.add(createConstantPropagationPass());
passes.add(createSCCPPass());
passes.add(createAggressiveDCEPass());
passes.run(*soFunc);
JitManager::DumpToFile(soFunc, "SoFunc_optimized");
return soFunc;
}
void
optimize(cpu_t *cpu)
{
FunctionPassManager pm = FunctionPassManager(cpu->mod);
pm.add(createPromoteMemoryToRegisterPass());
pm.add(createInstructionCombiningPass());
pm.add(createConstantPropagationPass());
pm.add(createDeadCodeEliminationPass());
pm.run(*cpu->cur_func);
}
void
optimize(cpu_t *cpu)
{
dyncom_engine_t* de = cpu->dyncom_engine;
FunctionPassManager pm = FunctionPassManager(de->mod);
std::string data_layout = de->exec_engine->getTargetData()->getStringRepresentation();
TargetData *TD = new TargetData(data_layout);
pm.add(TD);
pm.add(createPromoteMemoryToRegisterPass());
pm.add(createInstructionCombiningPass());
pm.add(createConstantPropagationPass());
pm.add(createDeadCodeEliminationPass());
pm.run(*de->cur_func);
}
// =============================================================================
// runOnModule
//
//
//
// =============================================================================
bool TwetoPassImpl::runOnModule(Module & M)
{
MSG("\n============== Tweto Pass =============\n");
this->llvmMod = &M;
LinkExternalBitcode(this->llvmMod, ExternalBitCodePath);
// Retrieve the method that does all the vtable calculations
// in order to call the actual 'write' method (see replaceCallsInProcess)
this->writeFun =
this->llvmMod->getFunction("tweto_call_write_method");
if (!this->writeFun) {
std::cerr << "tweto_call_write_method is missing,";
std::cerr << "pass aborded!" << std::endl;
return false;
}
// Retrieve the base write method in order to get the types
// of the 'this' pointer, the address and the data
// (should be always mangled like this, so if the Basic-protocol's includes
// are correctly imported, no error will be throw)
this->basicWriteFun = this->llvmMod->getFunction(wFunName);
if (!this->basicWriteFun) {
std::cerr << "basic's write method is missing,";
std::cerr << "pass aborded!" << std::endl;
return false;
}
writeFun->dump();
// Initialize function passes
DataLayout *target = new DataLayout(this->llvmMod);
DataLayoutPass *dlpass = new DataLayoutPass(*target);
funPassManager = new FunctionPassManager(this->llvmMod);
funPassManager->add(dlpass);
funPassManager->add(createIndVarSimplifyPass());
funPassManager->add(createLoopUnrollPass());
funPassManager->add(createInstructionCombiningPass());
funPassManager->add(createReassociatePass());
funPassManager->add(createGVNPass());
funPassManager->add(createCFGSimplificationPass());
funPassManager->add(createConstantPropagationPass());
// Modules
std::vector < sc_core::sc_module * >modules =
sc_core::sc_get_curr_simcontext()->get_module_registry()->
m_module_vec;
std::vector < sc_core::sc_module * >::iterator modIt;
for (modIt = modules.begin(); modIt < modules.end(); ++modIt) {
sc_core::sc_module * initiatorMod = *modIt;
std::string moduleName =
(std::string) initiatorMod->name();
// Optimize this module
optimize(initiatorMod);
}
// Check if the module is corrupt
verifyModule(*this->llvmMod);
std::ostringstream oss;
oss << callOptCounter;
MSG("\n Pass report - " + oss.str() + "/" + "?");
MSG(" - opt/total\n");
MSG("===========================================\n\n");
// TODO : handle false case
return true;
}
Function * futamurize( const Function * orig_func, DenseMap<const Value*, Value*> &argmap, std::set<const unsigned char *> &constant_addresses_set )
{
LLVMContext &context = getGlobalContext();
// Make a copy of the function, removing constant arguments
Function * specialized_func = CloneFunction( orig_func, argmap );
specialized_func->setName( orig_func->getNameStr() + "_1" );
// add it to our module
LLVM_Module->getFunctionList().push_back( specialized_func );
printf("\nspecialized_func = %p <%s>\n", specialized_func, specialized_func->getName().data());
//~ specialized_func->dump();
// Optimize it
FunctionPassManager PM( LLVM_Module );
createStandardFunctionPasses( &PM, 3 );
PM.add(createScalarReplAggregatesPass()); // Break up aggregate allocas
PM.add(createInstructionCombiningPass()); // Cleanup for scalarrepl.
PM.add(createJumpThreadingPass()); // Thread jumps.
PM.add(createCFGSimplificationPass()); // Merge & remove BBs
PM.add(createInstructionCombiningPass()); // Combine silly seq's
PM.add(createTailCallEliminationPass()); // Eliminate tail calls
PM.add(createCFGSimplificationPass()); // Merge & remove BBs
PM.add(createReassociatePass()); // Reassociate expressions
PM.add(createLoopRotatePass()); // Rotate Loop
PM.add(createLICMPass()); // Hoist loop invariants
PM.add(createLoopUnswitchPass( false ));
PM.add(createInstructionCombiningPass());
PM.add(createIndVarSimplifyPass()); // Canonicalize indvars
PM.add(createLoopDeletionPass()); // Delete dead loops
PM.add(createLoopUnroll2Pass()); // Unroll small loops
PM.add(createInstructionCombiningPass()); // Clean up after the unroller
PM.add(createGVNPass()); // Remove redundancies
PM.add(createMemCpyOptPass()); // Remove memcpy / form memset
PM.add(createSCCPPass()); // Constant prop with SCCP
PM.add(createPromoteMemoryToRegisterPass());
PM.add(createConstantPropagationPass());
PM.add(createDeadStoreEliminationPass());
PM.add(createAggressiveDCEPass());
PM.add(new MemoryDependenceAnalysis());
//~ PM.add(createAAEvalPass());
const PassInfo * pinfo = Pass::lookupPassInfo( "print-alias-sets" );
if( !pinfo ) { printf( "print-alias-sets not found\n" ); exit(-1); }
PM.add( pinfo->createPass() );
FunctionPassManager PM_Inline( LLVM_Module );
PM_Inline.add(createSingleFunctionInliningPass());
bool Changed = false;
int iterations = 2;
int inline_iterations = 6;
do
{
Changed = false;
// first do some optimizations
PM.doInitialization();
PM.run( *specialized_func );
PM.doFinalization();
// Load from Constant Memory detection
const TargetData *TD = LLVM_EE->getTargetData();
for (inst_iterator I = inst_begin(specialized_func), E = inst_end(specialized_func); I != E; ++I)
{
Instruction * inst = (Instruction *) &*I;
// get all Load instructions
LoadInst * load = dyn_cast<LoadInst>( inst );
if( !load ) continue;
if( load->isVolatile() ) continue;
if (load->use_empty()) continue; // Don't muck with dead instructions...
// get the address loaded by load instruction
Value *ptr_value = load->getPointerOperand();
// we're only interested in constant addresses
ConstantExpr * ptr_constant_expr = dyn_cast<ConstantExpr>( ptr_value );
if( !ptr_constant_expr ) continue;
ptr_constant_expr->dump();
// compute real address of constant pointer expression
Constant * ptr_constant = ConstantFoldConstantExpression( ptr_constant_expr, TD );
if( !ptr_constant ) continue;
ptr_constant->dump();
// convert to int constant
ConstantInt *int_constant = dyn_cast<ConstantInt>( ConstantExpr::getPtrToInt( ptr_constant, Type::getInt64Ty( context )));
if( !int_constant ) continue;
int_constant->dump();
// get data size
int data_length = TD->getTypeAllocSize( load->getType() );
ptr_value->getType()->dump();
// get real address (at last !)
const unsigned char * c_ptr = (const unsigned char *) int_constant->getLimitedValue();
printf( "%ld %d %d\n", c_ptr, constant_addresses_set.count( c_ptr ), data_length );
// check what's in this address
int isconst = 1;
for( int offset=0; offset<data_length; offset++ )
isconst &= constant_addresses_set.count( c_ptr + offset );
if( !isconst ) continue;
printf( "It is constant.\n" );
// make a LLVM const with the data
Constant *new_constant = NULL;
switch( data_length )
{
case 1: new_constant = ConstantInt::get( Type::getInt8Ty( context ), *(uint8_t*)c_ptr, false /* signed */ ); break;
case 2: new_constant = ConstantInt::get( Type::getInt16Ty( context ), *(uint16_t*)c_ptr, false /* signed */ ); break;
case 4: new_constant = ConstantInt::get( Type::getInt32Ty( context ), *(uint32_t*)c_ptr, false /* signed */ ); break;
case 8: new_constant = ConstantInt::get( Type::getInt64Ty( context ), *(uint64_t*)c_ptr, false /* signed */ ); break;
default:
{
StringRef const_data ( (const char *) c_ptr, data_length );
new_constant = ConstantArray::get( context, const_data, false /* dont add terminating null */ );
}
}
if( !new_constant ) continue;
new_constant->dump();
//~ // get the type that is loaded
const Type *Ty = load->getType();
// do we need a cast ?
if( load->getType() != new_constant->getType() )
{
new_constant = ConstantExpr::getBitCast( new_constant, Ty );
new_constant->dump();
}
// zap the load and replace with constant address
load->replaceAllUsesWith( new_constant );
printf( "\nREPLACED :...\n" );
load->dump();
new_constant->dump();
Changed = true;
}
if( Changed )
continue; // re-optimize and do another pass of constant load elimination
// if we can't do anything else, do an inlining pass
if( inline_iterations > 0 )
{
inline_iterations --;
PM_Inline.doInitialization();
Changed |= PM_Inline.run( *specialized_func );
PM_Inline.doFinalization();
//~ for( int i=0; i<3; i++ )
{
PM.doInitialization();
Changed |= PM.run( *specialized_func );
PM.doFinalization();
}
}
if( iterations>0 && !Changed )
iterations--;
} while( Changed || iterations>0 );
return specialized_func;
}