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//===- TypeMetadataUtils.h - Utilities related to type metadata --*- C++ -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains functions that make it easier to manipulate type metadata
// for devirtualization.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_TYPEMETADATAUTILS_H
#define LLVM_ANALYSIS_TYPEMETADATAUTILS_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/IR/CallSite.h"
namespace llvm {
class DominatorTree;
/// The type of CFI jumptable needed for a function.
enum CfiFunctionLinkage {
CFL_Definition = 0,
CFL_Declaration = 1,
CFL_WeakDeclaration = 2
};
/// A call site that could be devirtualized.
struct DevirtCallSite {
/// The offset from the address point to the virtual function.
uint64_t Offset;
/// The call site itself.
CallSite CS;
};
/// Given a call to the intrinsic \@llvm.type.test, find all devirtualizable
/// call sites based on the call and return them in DevirtCalls.
void findDevirtualizableCallsForTypeTest(
SmallVectorImpl<DevirtCallSite> &DevirtCalls,
SmallVectorImpl<CallInst *> &Assumes, const CallInst *CI,
DominatorTree &DT);
/// Given a call to the intrinsic \@llvm.type.checked.load, find all
/// devirtualizable call sites based on the call and return them in DevirtCalls.
void findDevirtualizableCallsForTypeCheckedLoad(
SmallVectorImpl<DevirtCallSite> &DevirtCalls,
SmallVectorImpl<Instruction *> &LoadedPtrs,
SmallVectorImpl<Instruction *> &Preds, bool &HasNonCallUses,
const CallInst *CI, DominatorTree &DT);
}
#endif
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