TinyPtrVector.h revision 147d9e05116518461653695a6022f6109f0eb936
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/STLExtras.h" 16147d9e05116518461653695a6022f6109f0eb936Chandler Carruth#include "llvm/ADT/SmallVector.h" 17ac5802bca0285eee49c1c372846552823d819181Benjamin Kramer#include "llvm/Support/Compiler.h" 189d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner 199d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattnernamespace llvm { 209d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner 219d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// TinyPtrVector - This class is specialized for cases where there are 229d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// normally 0 or 1 element in a vector, but is general enough to go beyond that 239d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// when required. 249d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// 259d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// NOTE: This container doesn't allow you to store a null pointer into it. 269d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner/// 279d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattnertemplate <typename EltTy> 289d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattnerclass TinyPtrVector { 299d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattnerpublic: 309d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner typedef llvm::SmallVector<EltTy, 4> VecTy; 3140dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth typedef typename VecTy::value_type value_type; 3240dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth 339d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner llvm::PointerUnion<EltTy, VecTy*> Val; 34b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 359d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner TinyPtrVector() {} 3606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth ~TinyPtrVector() { 3706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (VecTy *V = Val.template dyn_cast<VecTy*>()) 3806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth delete V; 3906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 4006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 419d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner TinyPtrVector(const TinyPtrVector &RHS) : Val(RHS.Val) { 429d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (VecTy *V = Val.template dyn_cast<VecTy*>()) 439d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = new VecTy(*V); 449d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 4506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth TinyPtrVector &operator=(const TinyPtrVector &RHS) { 4606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (this == &RHS) 4706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 4806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.empty()) { 4906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth this->clear(); 5006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 5106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 5206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 5306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // Try to squeeze into the single slot. If it won't fit, allocate a copied 5406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // vector. 5506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (Val.template is<EltTy>()) { 5606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.size() == 1) 5706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val = RHS.front(); 5806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth else 5906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val = new VecTy(*RHS.Val.template get<VecTy*>()); 6006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 6106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 6206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 6306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // If we have a full vector allocated, try to re-use it. 6406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.Val.template is<EltTy>()) { 6506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val.template get<VecTy*>()->clear(); 6606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val.template get<VecTy*>()->push_back(RHS.front()); 6706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } else { 6806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth *Val.template get<VecTy*>() = *RHS.Val.template get<VecTy*>(); 6906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 7006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 7106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 7206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 73ac5802bca0285eee49c1c372846552823d819181Benjamin Kramer#if LLVM_USE_RVALUE_REFERENCES 74ac5802bca0285eee49c1c372846552823d819181Benjamin Kramer TinyPtrVector(TinyPtrVector &&RHS) : Val(RHS.Val) { 75ac5802bca0285eee49c1c372846552823d819181Benjamin Kramer RHS.Val = (EltTy)0; 76ac5802bca0285eee49c1c372846552823d819181Benjamin Kramer } 7706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth TinyPtrVector &operator=(TinyPtrVector &&RHS) { 7806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (this == &RHS) 7906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 8006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.empty()) { 8106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth this->clear(); 8206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 8306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 8406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 8506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // If this vector has been allocated on the heap, re-use it if cheap. If it 8606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // would require more copying, just delete it and we'll steal the other 8706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // side. 8806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (VecTy *V = Val.template dyn_cast<VecTy*>()) { 8906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.Val.template is<EltTy>()) { 9006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth V->clear(); 9106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth V->push_back(RHS.front()); 9206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 9306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 949d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner delete V; 9506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 9606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 9706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val = RHS.Val; 9806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth RHS.Val = (EltTy)0; 9906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 1009d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 10106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth#endif 102b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 103266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner // implicit conversion operator to ArrayRef. 104266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner operator ArrayRef<EltTy>() const { 105266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner if (Val.isNull()) 106266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner return ArrayRef<EltTy>(); 107266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner if (Val.template is<EltTy>()) 108bb9dbb7d6b4f39b74b755795e31b219a5518dd77Eli Friedman return *Val.getAddrOfPtr1(); 109266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner return *Val.template get<VecTy*>(); 110266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner } 111b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1129d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner bool empty() const { 11322e522e08640be459f237796009cf7666d6d75e7Chris Lattner // This vector can be empty if it contains no element, or if it 11422e522e08640be459f237796009cf7666d6d75e7Chris Lattner // contains a pointer to an empty vector. 1159d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (Val.isNull()) return true; 1169d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) 1179d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return Vec->empty(); 1189d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return false; 1199d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 120b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1219d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner unsigned size() const { 1229d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (empty()) 1239d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return 0; 12422e522e08640be459f237796009cf7666d6d75e7Chris Lattner if (Val.template is<EltTy>()) 1259d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return 1; 12622e522e08640be459f237796009cf7666d6d75e7Chris Lattner return Val.template get<VecTy*>()->size(); 1279d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 128b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 129e6f1355c38fb66b0bee35cb4d6ec93f07196d961Benjamin Kramer typedef const EltTy *const_iterator; 130bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis typedef EltTy *iterator; 131bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 132bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis iterator begin() { 13379976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner if (Val.template is<EltTy>()) 1340db235a2b0ed6ae5c3c870012061906054b6dbc4Argyrios Kyrtzidis return Val.getAddrOfPtr1(); 135b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 13679976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner return Val.template get<VecTy *>()->begin(); 13779976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner 13879976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner } 139bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis iterator end() { 14079976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner if (Val.template is<EltTy>()) 14140dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth return begin() + (Val.isNull() ? 0 : 1); 142b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 14379976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner return Val.template get<VecTy *>()->end(); 14479976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner } 14579976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner 146bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis const_iterator begin() const { 147bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis return (const_iterator)const_cast<TinyPtrVector*>(this)->begin(); 148bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 149bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 150bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis const_iterator end() const { 151bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis return (const_iterator)const_cast<TinyPtrVector*>(this)->end(); 152bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 153bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 1549d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner EltTy operator[](unsigned i) const { 1559d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(!Val.isNull() && "can't index into an empty vector"); 1569d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) { 1579d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(i == 0 && "tinyvector index out of range"); 1589d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return V; 1599d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 160b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 161b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth assert(i < Val.template get<VecTy*>()->size() && 1629d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner "tinyvector index out of range"); 16322e522e08640be459f237796009cf7666d6d75e7Chris Lattner return (*Val.template get<VecTy*>())[i]; 1649d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 165b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1669d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner EltTy front() const { 1679d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(!empty() && "vector empty"); 1689d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) 1699d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return V; 1709d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return Val.template get<VecTy*>()->front(); 1719d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 172b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1732edc74aa1fb541253f4286a70194960dab69506bChris Lattner EltTy back() const { 1742edc74aa1fb541253f4286a70194960dab69506bChris Lattner assert(!empty() && "vector empty"); 1752edc74aa1fb541253f4286a70194960dab69506bChris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) 1762edc74aa1fb541253f4286a70194960dab69506bChris Lattner return V; 1772edc74aa1fb541253f4286a70194960dab69506bChris Lattner return Val.template get<VecTy*>()->back(); 1782edc74aa1fb541253f4286a70194960dab69506bChris Lattner } 1792edc74aa1fb541253f4286a70194960dab69506bChris Lattner 1809d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner void push_back(EltTy NewVal) { 1819d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(NewVal != 0 && "Can't add a null value"); 182b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1839d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have nothing, add something. 1849d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (Val.isNull()) { 1859d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = NewVal; 1869d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return; 1879d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 188b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1899d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have a single value, convert to a vector. 19022e522e08640be459f237796009cf7666d6d75e7Chris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) { 1919d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = new VecTy(); 1929d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val.template get<VecTy*>()->push_back(V); 1939d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 194b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1959d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // Add the new value, we know we have a vector. 1969d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val.template get<VecTy*>()->push_back(NewVal); 1979d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 198b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1992edc74aa1fb541253f4286a70194960dab69506bChris Lattner void pop_back() { 2002edc74aa1fb541253f4286a70194960dab69506bChris Lattner // If we have a single value, convert to empty. 2012edc74aa1fb541253f4286a70194960dab69506bChris Lattner if (Val.template is<EltTy>()) 2022edc74aa1fb541253f4286a70194960dab69506bChris Lattner Val = (EltTy)0; 2032edc74aa1fb541253f4286a70194960dab69506bChris Lattner else if (VecTy *Vec = Val.template get<VecTy*>()) 2042edc74aa1fb541253f4286a70194960dab69506bChris Lattner Vec->pop_back(); 2052edc74aa1fb541253f4286a70194960dab69506bChris Lattner } 2062edc74aa1fb541253f4286a70194960dab69506bChris Lattner 2079d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner void clear() { 2089d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have a single value, convert to empty. 209840635741f132a9a10f052cbf3b21e14bc74835aChris Lattner if (Val.template is<EltTy>()) { 2109d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = (EltTy)0; 2119d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) { 2129d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have a vector form, just clear it. 2139d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Vec->clear(); 2149d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 2159d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // Otherwise, we're already empty. 2169d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 217bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 218bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis iterator erase(iterator I) { 2190b1bcbf6b87f19402d8aef1ef9f6e527a07de9d4Chandler Carruth assert(I >= begin() && "Iterator to erase is out of bounds."); 2200b1bcbf6b87f19402d8aef1ef9f6e527a07de9d4Chandler Carruth assert(I < end() && "Erasing at past-the-end iterator."); 2210b1bcbf6b87f19402d8aef1ef9f6e527a07de9d4Chandler Carruth 222bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis // If we have a single value, convert to empty. 223bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis if (Val.template is<EltTy>()) { 224bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis if (I == begin()) 225bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis Val = (EltTy)0; 226bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) { 227bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis // multiple items in a vector; just do the erase, there is no 228bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis // benefit to collapsing back to a pointer 229bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis return Vec->erase(I); 230bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 23140dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth return end(); 232bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 233147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 234147d9e05116518461653695a6022f6109f0eb936Chandler Carruth iterator erase(iterator S, iterator E) { 235147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(S >= begin() && "Range to erase is out of bounds."); 236147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(S <= E && "Trying to erase invalid range."); 237147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(E <= end() && "Trying to erase past the end."); 238147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 239147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (Val.template is<EltTy>()) { 240147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (S == begin() && S != E) 241147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = (EltTy)0; 242147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) { 243147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return Vec->erase(S, E); 244147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 245147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return end(); 246147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 247147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 248147d9e05116518461653695a6022f6109f0eb936Chandler Carruth iterator insert(iterator I, const EltTy &Elt) { 249147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I >= this->begin() && "Insertion iterator is out of bounds."); 250147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I <= this->end() && "Inserting past the end of the vector."); 251147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (I == end()) { 252147d9e05116518461653695a6022f6109f0eb936Chandler Carruth push_back(Elt); 253147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return llvm::prior(end()); 254147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 255147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(!Val.isNull() && "Null value with non-end insert iterator."); 256147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (EltTy V = Val.template dyn_cast<EltTy>()) { 257147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I == begin()); 258147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = Elt; 259147d9e05116518461653695a6022f6109f0eb936Chandler Carruth push_back(V); 260147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return begin(); 261147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 262147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 263147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return Val.template get<VecTy*>()->insert(I, Elt); 264147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 265147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 266147d9e05116518461653695a6022f6109f0eb936Chandler Carruth template<typename ItTy> 267147d9e05116518461653695a6022f6109f0eb936Chandler Carruth iterator insert(iterator I, ItTy From, ItTy To) { 268147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I >= this->begin() && "Insertion iterator is out of bounds."); 269147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I <= this->end() && "Inserting past the end of the vector."); 270147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (From == To) 271147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return I; 272147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 273147d9e05116518461653695a6022f6109f0eb936Chandler Carruth // If we have a single value, convert to a vector. 274147d9e05116518461653695a6022f6109f0eb936Chandler Carruth ptrdiff_t Offset = I - begin(); 275147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (Val.isNull()) { 276147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (llvm::next(From) == To) { 277147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = *From; 278147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return begin(); 279147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 280147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 281147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = new VecTy(); 282147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } else if (EltTy V = Val.template dyn_cast<EltTy>()) { 283147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = new VecTy(); 284147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val.template get<VecTy*>()->push_back(V); 285147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 286147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return Val.template get<VecTy*>()->insert(begin() + Offset, From, To); 287147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 2889d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner}; 2899d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner} // end namespace llvm 2909d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner 2919d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner#endif 292