You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
#include "llvm/Pass.h"
|
|
#include "llvm/Function.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Instructions.h"
|
|
#include "llvm/Constants.h"
|
|
#include "llvm/Support/IRBuilder.h"
|
|
#include "llvm/Analysis/LoopInfo.h"
|
|
#include "IMPCacher.h"
|
|
#include <string>
|
|
|
|
using namespace llvm;
|
|
using std::string;
|
|
|
|
namespace
|
|
{
|
|
class GNULoopIMPCachePass : public FunctionPass
|
|
{
|
|
GNUstep::IMPCacher *cacher;
|
|
const IntegerType *IntTy;
|
|
|
|
public:
|
|
static char ID;
|
|
GNULoopIMPCachePass() : FunctionPass((intptr_t)&ID) {}
|
|
~GNULoopIMPCachePass() { delete cacher; }
|
|
|
|
virtual bool doInitialization(Module &Mod) {
|
|
cacher = new GNUstep::IMPCacher(Mod.getContext(), this);
|
|
// FIXME: ILP64
|
|
IntTy = Type::getInt32Ty(Mod.getContext());
|
|
return false;
|
|
}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &Info) const {
|
|
Info.addRequired<LoopInfo>();
|
|
}
|
|
|
|
|
|
virtual bool runOnFunction(Function &F) {
|
|
LoopInfo &LI = getAnalysis<LoopInfo>();
|
|
bool modified = false;
|
|
SmallVector<CallInst*, 16> Lookups;
|
|
BasicBlock *entry = &F.getEntryBlock();
|
|
|
|
for (Function::iterator i=F.begin(), end=F.end() ;
|
|
i != end ; ++i) {
|
|
// Ignore basic blocks that are not parts of loops.
|
|
if (LI.getLoopDepth(i) == 0) { continue; }
|
|
for (BasicBlock::iterator b=i->begin(), last=i->end() ;
|
|
b != last ; ++b) {
|
|
if (CallInst *call = dyn_cast<CallInst>(b)) {
|
|
Value *callee = call->getCalledValue()->stripPointerCasts();
|
|
if (Function *func = dyn_cast<Function>(callee)) {
|
|
if (func->getName() == "objc_msg_lookup_sender") {
|
|
modified = true;
|
|
Lookups.push_back(call);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
IRBuilder<> B = IRBuilder<>(entry);
|
|
for (SmallVectorImpl<CallInst*>::iterator i=Lookups.begin(),
|
|
e=Lookups.end() ; e!=i ; i++) {
|
|
const Type *SlotPtrTy = (*i)->getType();
|
|
B.SetInsertPoint(entry, entry->begin());
|
|
Value *slot = B.CreateAlloca(SlotPtrTy, 0, "slot");
|
|
Value *version = B.CreateAlloca(IntTy, 0, "slot_version");
|
|
|
|
B.SetInsertPoint(entry, entry->getTerminator());
|
|
B.CreateStore(Constant::getNullValue(SlotPtrTy), slot);
|
|
B.CreateStore(Constant::getNullValue(IntTy), version);
|
|
cacher->CacheLookup(*i, slot, version);
|
|
}
|
|
return modified;
|
|
}
|
|
};
|
|
|
|
char GNULoopIMPCachePass::ID = 0;
|
|
RegisterPass<GNULoopIMPCachePass> X("gnu-loop-imp-cache",
|
|
"Cache IMPs in loops pass");
|
|
}
|
|
|
|
FunctionPass *createGNULoopIMPCachePass(void)
|
|
{
|
|
return new GNULoopIMPCachePass();
|
|
}
|