LowerIntrinsics Class Reference

Inheritance diagram for LowerIntrinsics:

Collaboration diagram for LowerIntrinsics:

Public Member Functions
PreservedAnalyses	run (Function &F, FunctionAnalysisManager &AM)
bool	runOnBasicBlock (BasicBlock &BB)

Private Member Functions
bool	doInitialization (Module &M)
bool	doFinalization (Module &M)

Private Attributes
std::set< unsigned >	replace_
	List of intrinsics to replace.
IntrinsicLowering *	iLowering_
TargetData *	td_

Detailed Description

Definition at line 68 of file LowerIntrinsics.cc.

Member Function Documentation

doFinalization()

bool LowerIntrinsics::doFinalization ( Module &  M )

private

Definition at line 120 of file LowerIntrinsics.cc.

                                         {
    if (iLowering_ != NULL) {
        delete iLowering_;
        iLowering_ = NULL;
    }
    if (td_ != NULL) {
        delete td_;
        td_ = NULL;
    }
    return true;
}

References iLowering_, and td_.

Referenced by run().

doInitialization()

bool LowerIntrinsics::doInitialization ( Module &  M )

private

Definition at line 101 of file LowerIntrinsics.cc.

                                           {
 
    // Initialize list of intrinsics to lower.
    replace_.insert(Intrinsic::get_rounding);
    replace_.insert(Intrinsic::ceil);
    replace_.insert(Intrinsic::floor);
    replace_.insert(Intrinsic::round);
    replace_.insert(Intrinsic::exp2);
    replace_.insert(Intrinsic::memcpy);
    replace_.insert(Intrinsic::memset);
    replace_.insert(Intrinsic::memmove);
 
    assert(iLowering_ == NULL && td_ == NULL);
    td_ = new TargetData(&M);
    iLowering_ = new IntrinsicLowering(*td_);
    return true;
}

References assert, iLowering_, replace_, TargetData, and td_.

Referenced by run().

run()

PreservedAnalyses LowerIntrinsics::run	(	Function &	F,
		FunctionAnalysisManager &	AM
	)

Definition at line 87 of file LowerIntrinsics.cc.

                                                                    {
    //errs() << F.getName() << "\n";
  Module *parentModule = F.getParent();
  doInitialization(*parentModule);
  for (BasicBlock &BB : F) {
      runOnBasicBlock(BB);
  }
  doFinalization(*parentModule);
  return PreservedAnalyses::all();
}

References doFinalization(), doInitialization(), and runOnBasicBlock().

Here is the call graph for this function:

runOnBasicBlock()

bool LowerIntrinsics::runOnBasicBlock

(

BasicBlock &

BB

)

Definition at line 134 of file LowerIntrinsics.cc.

                                               {
    bool changed = true;
    while (changed)  {
        changed = false;
        for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ++I) {
            CallInst* ci = dyn_cast<CallInst>(&(*I));
            if (ci != NULL && ci->arg_size() != 0) {
                Function* callee = ci->getCalledFunction();
                if (callee != NULL && callee->isIntrinsic() &&
                    replace_.find(callee->getIntrinsicID()) != replace_.end()) {
                    if (callee->getIntrinsicID() == Intrinsic::get_rounding) {
                        // Replace GET_ROUNDING intrinsic with the actual
                        // constant value to avoid stupid  "if (1 == 0)"
                        // code even with full optimizations.
                        I->replaceAllUsesWith(
                            ConstantInt::get(
                                Type::getInt32Ty(BB.getContext()), 0, true));
                        I->eraseFromParent();
                        changed = true;
                        break;
                    } else {
                        iLowering_->LowerIntrinsicCall(ci);
                        changed = true;
                        break;
                    }
                }
            }
        }
    }
    return true;
}

References iLowering_, and replace_.

Referenced by run().

Member Data Documentation

iLowering_

IntrinsicLowering* LowerIntrinsics::iLowering_

private

Definition at line 83 of file LowerIntrinsics.cc.

Referenced by doFinalization(), doInitialization(), and runOnBasicBlock().

replace_

std::set<unsigned> LowerIntrinsics::replace_

private

List of intrinsics to replace.

Definition at line 82 of file LowerIntrinsics.cc.

Referenced by doInitialization(), and runOnBasicBlock().

td_

TargetData* LowerIntrinsics::td_

private

Definition at line 84 of file LowerIntrinsics.cc.

Referenced by doFinalization(), and doInitialization().

---

The documentation for this class was generated from the following file:

• LowerIntrinsics.cc