1 //===- TypeMetadataUtils.h - Utilities related to type metadata --*- C++ -*-==// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains functions that make it easier to manipulate type metadata 11 // for devirtualization. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_ANALYSIS_TYPEMETADATAUTILS_H 16 #define LLVM_ANALYSIS_TYPEMETADATAUTILS_H 17 18 #include "llvm/ADT/SmallVector.h" 19 #include "llvm/IR/CallSite.h" 20 21 namespace llvm { 22 23 /// The type of CFI jumptable needed for a function. 24 enum CfiFunctionLinkage { 25 CFL_Definition = 0, 26 CFL_Declaration = 1, 27 CFL_WeakDeclaration = 2 28 }; 29 30 /// A call site that could be devirtualized. 31 struct DevirtCallSite { 32 /// The offset from the address point to the virtual function. 33 uint64_t Offset; 34 /// The call site itself. 35 CallSite CS; 36 }; 37 38 /// Given a call to the intrinsic @llvm.type.test, find all devirtualizable 39 /// call sites based on the call and return them in DevirtCalls. 40 void findDevirtualizableCallsForTypeTest( 41 SmallVectorImpl<DevirtCallSite> &DevirtCalls, 42 SmallVectorImpl<CallInst *> &Assumes, const CallInst *CI); 43 44 /// Given a call to the intrinsic @llvm.type.checked.load, find all 45 /// devirtualizable call sites based on the call and return them in DevirtCalls. 46 void findDevirtualizableCallsForTypeCheckedLoad( 47 SmallVectorImpl<DevirtCallSite> &DevirtCalls, 48 SmallVectorImpl<Instruction *> &LoadedPtrs, 49 SmallVectorImpl<Instruction *> &Preds, bool &HasNonCallUses, 50 const CallInst *CI); 51 } 52 53 #endif 54
