19d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner//===- llvm/ADT/TinyPtrVector.h - 'Normally tiny' vectors -------*- C++ -*-===// 29d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner// 39d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner// The LLVM Compiler Infrastructure 49d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner// 59d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner// This file is distributed under the University of Illinois Open Source 69d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner// License. See LICENSE.TXT for details. 79d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner// 89d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner//===----------------------------------------------------------------------===// 99d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner 109d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner#ifndef LLVM_ADT_TINYPTRVECTOR_H 119d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner#define LLVM_ADT_TINYPTRVECTOR_H 129d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner 13ac5802bca0285eee49c1c372846552823d819181Benjamin Kramer#include "llvm/ADT/ArrayRef.h" 149d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner#include "llvm/ADT/PointerUnion.h" 15147d9e05116518461653695a6022f6109f0eb936Chandler Carruth#include "llvm/ADT/SmallVector.h" 169d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner 179d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattnernamespace llvm { 189d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner 199d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// TinyPtrVector - This class is specialized for cases where there are 209d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// normally 0 or 1 element in a vector, but is general enough to go beyond that 219d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// when required. 229d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// 239d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// NOTE: This container doesn't allow you to store a null pointer into it. 249d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// 259d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattnertemplate <typename EltTy> 269d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattnerclass TinyPtrVector { 279d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattnerpublic: 289d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner typedef llvm::SmallVector<EltTy, 4> VecTy; 2940dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth typedef typename VecTy::value_type value_type; 3040dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth 319d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner llvm::PointerUnion<EltTy, VecTy*> Val; 32b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 339d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner TinyPtrVector() {} 3406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth ~TinyPtrVector() { 3506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (VecTy *V = Val.template dyn_cast<VecTy*>()) 3606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth delete V; 3706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 3806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 399d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner TinyPtrVector(const TinyPtrVector &RHS) : Val(RHS.Val) { 409d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (VecTy *V = Val.template dyn_cast<VecTy*>()) 419d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = new VecTy(*V); 429d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 4306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth TinyPtrVector &operator=(const TinyPtrVector &RHS) { 4406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (this == &RHS) 4506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 4606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.empty()) { 4706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth this->clear(); 4806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 4906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 5006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 5106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // Try to squeeze into the single slot. If it won't fit, allocate a copied 5206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // vector. 5306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (Val.template is<EltTy>()) { 5406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.size() == 1) 5506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val = RHS.front(); 5606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth else 5706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val = new VecTy(*RHS.Val.template get<VecTy*>()); 5806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 5906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 6006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 6106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // If we have a full vector allocated, try to re-use it. 6206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.Val.template is<EltTy>()) { 6306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val.template get<VecTy*>()->clear(); 6406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val.template get<VecTy*>()->push_back(RHS.front()); 6506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } else { 6606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth *Val.template get<VecTy*>() = *RHS.Val.template get<VecTy*>(); 6706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 6806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 6906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 7006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 71ac5802bca0285eee49c1c372846552823d819181Benjamin Kramer TinyPtrVector(TinyPtrVector &&RHS) : Val(RHS.Val) { 72dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines RHS.Val = (EltTy)nullptr; 73ac5802bca0285eee49c1c372846552823d819181Benjamin Kramer } 7406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth TinyPtrVector &operator=(TinyPtrVector &&RHS) { 7506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (this == &RHS) 7606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 7706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.empty()) { 7806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth this->clear(); 7906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 8006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 8106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 8206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // If this vector has been allocated on the heap, re-use it if cheap. If it 8306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // would require more copying, just delete it and we'll steal the other 8406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // side. 8506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (VecTy *V = Val.template dyn_cast<VecTy*>()) { 8606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.Val.template is<EltTy>()) { 8706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth V->clear(); 8806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth V->push_back(RHS.front()); 8906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 9006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 919d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner delete V; 9206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 9306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 9406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val = RHS.Val; 95dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines RHS.Val = (EltTy)nullptr; 9606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 979d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 98b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 99266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner // implicit conversion operator to ArrayRef. 100266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner operator ArrayRef<EltTy>() const { 101266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner if (Val.isNull()) 102266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner return ArrayRef<EltTy>(); 103266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner if (Val.template is<EltTy>()) 104bb9dbb7d6b4f39b74b755795e31b219a5518dd77Eli Friedman return *Val.getAddrOfPtr1(); 105266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner return *Val.template get<VecTy*>(); 106266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner } 107b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1089d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner bool empty() const { 10922e522e08640be459f237796009cf7666d6d75e7Chris Lattner // This vector can be empty if it contains no element, or if it 11022e522e08640be459f237796009cf7666d6d75e7Chris Lattner // contains a pointer to an empty vector. 1119d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (Val.isNull()) return true; 1129d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) 1139d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return Vec->empty(); 1149d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return false; 1159d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 116b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1179d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner unsigned size() const { 1189d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (empty()) 1199d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return 0; 12022e522e08640be459f237796009cf7666d6d75e7Chris Lattner if (Val.template is<EltTy>()) 1219d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return 1; 12222e522e08640be459f237796009cf7666d6d75e7Chris Lattner return Val.template get<VecTy*>()->size(); 1239d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 124b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 125e6f1355c38fb66b0bee35cb4d6ec93f07196d961Benjamin Kramer typedef const EltTy *const_iterator; 126bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis typedef EltTy *iterator; 127bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 128bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis iterator begin() { 12979976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner if (Val.template is<EltTy>()) 1300db235a2b0ed6ae5c3c870012061906054b6dbc4Argyrios Kyrtzidis return Val.getAddrOfPtr1(); 131b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 13279976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner return Val.template get<VecTy *>()->begin(); 13379976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner 13479976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner } 135bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis iterator end() { 13679976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner if (Val.template is<EltTy>()) 13740dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth return begin() + (Val.isNull() ? 0 : 1); 138b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 13979976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner return Val.template get<VecTy *>()->end(); 14079976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner } 14179976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner 142bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis const_iterator begin() const { 143bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis return (const_iterator)const_cast<TinyPtrVector*>(this)->begin(); 144bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 145bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 146bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis const_iterator end() const { 147bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis return (const_iterator)const_cast<TinyPtrVector*>(this)->end(); 148bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 149bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 1509d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner EltTy operator[](unsigned i) const { 1519d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(!Val.isNull() && "can't index into an empty vector"); 1529d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) { 1539d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(i == 0 && "tinyvector index out of range"); 1549d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return V; 1559d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 156b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 157b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth assert(i < Val.template get<VecTy*>()->size() && 1589d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner "tinyvector index out of range"); 15922e522e08640be459f237796009cf7666d6d75e7Chris Lattner return (*Val.template get<VecTy*>())[i]; 1609d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 161b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1629d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner EltTy front() const { 1639d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(!empty() && "vector empty"); 1649d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) 1659d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return V; 1669d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return Val.template get<VecTy*>()->front(); 1679d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 168b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1692edc74aa1fb541253f4286a70194960dab69506bChris Lattner EltTy back() const { 1702edc74aa1fb541253f4286a70194960dab69506bChris Lattner assert(!empty() && "vector empty"); 1712edc74aa1fb541253f4286a70194960dab69506bChris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) 1722edc74aa1fb541253f4286a70194960dab69506bChris Lattner return V; 1732edc74aa1fb541253f4286a70194960dab69506bChris Lattner return Val.template get<VecTy*>()->back(); 1742edc74aa1fb541253f4286a70194960dab69506bChris Lattner } 1752edc74aa1fb541253f4286a70194960dab69506bChris Lattner 1769d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner void push_back(EltTy NewVal) { 177dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines assert(NewVal && "Can't add a null value"); 178b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1799d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have nothing, add something. 1809d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (Val.isNull()) { 1819d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = NewVal; 1829d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return; 1839d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 184b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1859d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have a single value, convert to a vector. 18622e522e08640be459f237796009cf7666d6d75e7Chris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) { 1879d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = new VecTy(); 1889d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val.template get<VecTy*>()->push_back(V); 1899d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 190b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1919d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // Add the new value, we know we have a vector. 1929d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val.template get<VecTy*>()->push_back(NewVal); 1939d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 194b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1952edc74aa1fb541253f4286a70194960dab69506bChris Lattner void pop_back() { 1962edc74aa1fb541253f4286a70194960dab69506bChris Lattner // If we have a single value, convert to empty. 1972edc74aa1fb541253f4286a70194960dab69506bChris Lattner if (Val.template is<EltTy>()) 198dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Val = (EltTy)nullptr; 1992edc74aa1fb541253f4286a70194960dab69506bChris Lattner else if (VecTy *Vec = Val.template get<VecTy*>()) 2002edc74aa1fb541253f4286a70194960dab69506bChris Lattner Vec->pop_back(); 2012edc74aa1fb541253f4286a70194960dab69506bChris Lattner } 2022edc74aa1fb541253f4286a70194960dab69506bChris Lattner 2039d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner void clear() { 2049d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have a single value, convert to empty. 205840635741f132a9a10f052cbf3b21e14bc74835aChris Lattner if (Val.template is<EltTy>()) { 206dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Val = (EltTy)nullptr; 2079d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) { 2089d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have a vector form, just clear it. 2099d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Vec->clear(); 2109d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 2119d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // Otherwise, we're already empty. 2129d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 213bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 214bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis iterator erase(iterator I) { 2150b1bcbf6b87f19402d8aef1ef9f6e527a07de9d4Chandler Carruth assert(I >= begin() && "Iterator to erase is out of bounds."); 2160b1bcbf6b87f19402d8aef1ef9f6e527a07de9d4Chandler Carruth assert(I < end() && "Erasing at past-the-end iterator."); 2170b1bcbf6b87f19402d8aef1ef9f6e527a07de9d4Chandler Carruth 218bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis // If we have a single value, convert to empty. 219bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis if (Val.template is<EltTy>()) { 220bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis if (I == begin()) 221dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Val = (EltTy)nullptr; 222bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) { 223bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis // multiple items in a vector; just do the erase, there is no 224bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis // benefit to collapsing back to a pointer 225bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis return Vec->erase(I); 226bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 22740dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth return end(); 228bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 229147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 230147d9e05116518461653695a6022f6109f0eb936Chandler Carruth iterator erase(iterator S, iterator E) { 231147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(S >= begin() && "Range to erase is out of bounds."); 232147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(S <= E && "Trying to erase invalid range."); 233147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(E <= end() && "Trying to erase past the end."); 234147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 235147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (Val.template is<EltTy>()) { 236147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (S == begin() && S != E) 237dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Val = (EltTy)nullptr; 238147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) { 239147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return Vec->erase(S, E); 240147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 241147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return end(); 242147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 243147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 244147d9e05116518461653695a6022f6109f0eb936Chandler Carruth iterator insert(iterator I, const EltTy &Elt) { 245147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I >= this->begin() && "Insertion iterator is out of bounds."); 246147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I <= this->end() && "Inserting past the end of the vector."); 247147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (I == end()) { 248147d9e05116518461653695a6022f6109f0eb936Chandler Carruth push_back(Elt); 24936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return std::prev(end()); 250147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 251147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(!Val.isNull() && "Null value with non-end insert iterator."); 252147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (EltTy V = Val.template dyn_cast<EltTy>()) { 253147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I == begin()); 254147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = Elt; 255147d9e05116518461653695a6022f6109f0eb936Chandler Carruth push_back(V); 256147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return begin(); 257147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 258147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 259147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return Val.template get<VecTy*>()->insert(I, Elt); 260147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 261147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 262147d9e05116518461653695a6022f6109f0eb936Chandler Carruth template<typename ItTy> 263147d9e05116518461653695a6022f6109f0eb936Chandler Carruth iterator insert(iterator I, ItTy From, ItTy To) { 264147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I >= this->begin() && "Insertion iterator is out of bounds."); 265147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I <= this->end() && "Inserting past the end of the vector."); 266147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (From == To) 267147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return I; 268147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 269147d9e05116518461653695a6022f6109f0eb936Chandler Carruth // If we have a single value, convert to a vector. 270147d9e05116518461653695a6022f6109f0eb936Chandler Carruth ptrdiff_t Offset = I - begin(); 271147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (Val.isNull()) { 27236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (std::next(From) == To) { 273147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = *From; 274147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return begin(); 275147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 276147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 277147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = new VecTy(); 278147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } else if (EltTy V = Val.template dyn_cast<EltTy>()) { 279147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = new VecTy(); 280147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val.template get<VecTy*>()->push_back(V); 281147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 282147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return Val.template get<VecTy*>()->insert(begin() + Offset, From, To); 283147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 2849d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner}; 2859d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner} // end namespace llvm 2869d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner 2879d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner#endif 288