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; 30ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines typedef llvm::PointerUnion<EltTy, VecTy *> PtrUnion; 3140dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth 32ebe69fe11e48d322045d5949c83283927a0d790bStephen Hinesprivate: 33ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines PtrUnion Val; 34b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 35ebe69fe11e48d322045d5949c83283927a0d790bStephen Hinespublic: 369d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner TinyPtrVector() {} 3706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth ~TinyPtrVector() { 3806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (VecTy *V = Val.template dyn_cast<VecTy*>()) 3906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth delete V; 4006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 4106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 429d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner TinyPtrVector(const TinyPtrVector &RHS) : Val(RHS.Val) { 439d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (VecTy *V = Val.template dyn_cast<VecTy*>()) 449d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = new VecTy(*V); 459d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 4606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth TinyPtrVector &operator=(const TinyPtrVector &RHS) { 4706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (this == &RHS) 4806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 4906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.empty()) { 5006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth this->clear(); 5106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 5206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 5306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 5406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // Try to squeeze into the single slot. If it won't fit, allocate a copied 5506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // vector. 5606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (Val.template is<EltTy>()) { 5706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.size() == 1) 5806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val = RHS.front(); 5906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth else 6006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val = new VecTy(*RHS.Val.template get<VecTy*>()); 6106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 6206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 6306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 6406bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth // If we have a full vector allocated, try to re-use it. 6506bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth if (RHS.Val.template is<EltTy>()) { 6606bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val.template get<VecTy*>()->clear(); 6706bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth Val.template get<VecTy*>()->push_back(RHS.front()); 6806bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } else { 6906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth *Val.template get<VecTy*>() = *RHS.Val.template get<VecTy*>(); 7006bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 7106bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 7206bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth } 7306bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth 74ac5802bca0285eee49c1c372846552823d819181Benjamin Kramer TinyPtrVector(TinyPtrVector &&RHS) : Val(RHS.Val) { 75dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines RHS.Val = (EltTy)nullptr; 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; 98dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines RHS.Val = (EltTy)nullptr; 9906bd8ca8c276d9bc20b192188224e1e5215666a0Chandler Carruth return *this; 1009d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 101b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 102ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines /// Constructor from an ArrayRef. 103ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines /// 104ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines /// This also is a constructor for individual array elements due to the single 105ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines /// element constructor for ArrayRef. 106ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines explicit TinyPtrVector(ArrayRef<EltTy> Elts) 107ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines : Val(Elts.size() == 1 ? PtrUnion(Elts[0]) 108ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines : PtrUnion(new VecTy(Elts.begin(), Elts.end()))) {} 109ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 110266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner // implicit conversion operator to ArrayRef. 111266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner operator ArrayRef<EltTy>() const { 112266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner if (Val.isNull()) 11337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines return None; 114266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner if (Val.template is<EltTy>()) 115bb9dbb7d6b4f39b74b755795e31b219a5518dd77Eli Friedman return *Val.getAddrOfPtr1(); 116ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines return *Val.template get<VecTy*>(); 117ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines } 118ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines 119ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines // implicit conversion operator to MutableArrayRef. 120ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines operator MutableArrayRef<EltTy>() { 121ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines if (Val.isNull()) 122ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines return None; 123ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines if (Val.template is<EltTy>()) 124ebe69fe11e48d322045d5949c83283927a0d790bStephen Hines return *Val.getAddrOfPtr1(); 125266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner return *Val.template get<VecTy*>(); 126266451dd95b12323fad9418df9b217918ec7e9e0Chris Lattner } 127b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1289d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner bool empty() const { 12922e522e08640be459f237796009cf7666d6d75e7Chris Lattner // This vector can be empty if it contains no element, or if it 13022e522e08640be459f237796009cf7666d6d75e7Chris Lattner // contains a pointer to an empty vector. 1319d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (Val.isNull()) return true; 1329d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) 1339d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return Vec->empty(); 1349d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return false; 1359d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 136b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1379d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner unsigned size() const { 1389d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (empty()) 1399d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return 0; 14022e522e08640be459f237796009cf7666d6d75e7Chris Lattner if (Val.template is<EltTy>()) 1419d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return 1; 14222e522e08640be459f237796009cf7666d6d75e7Chris Lattner return Val.template get<VecTy*>()->size(); 1439d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 144b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 145e6f1355c38fb66b0bee35cb4d6ec93f07196d961Benjamin Kramer typedef const EltTy *const_iterator; 146bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis typedef EltTy *iterator; 147bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 148bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis iterator begin() { 14979976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner if (Val.template is<EltTy>()) 1500db235a2b0ed6ae5c3c870012061906054b6dbc4Argyrios Kyrtzidis return Val.getAddrOfPtr1(); 151b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 15279976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner return Val.template get<VecTy *>()->begin(); 15379976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner 15479976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner } 155bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis iterator end() { 15679976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner if (Val.template is<EltTy>()) 15740dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth return begin() + (Val.isNull() ? 0 : 1); 158b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 15979976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner return Val.template get<VecTy *>()->end(); 16079976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner } 16179976a40728c8baa8cd16de90173fe2c48937e22Chris Lattner 162bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis const_iterator begin() const { 163bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis return (const_iterator)const_cast<TinyPtrVector*>(this)->begin(); 164bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 165bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 166bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis const_iterator end() const { 167bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis return (const_iterator)const_cast<TinyPtrVector*>(this)->end(); 168bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 169bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 1709d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner EltTy operator[](unsigned i) const { 1719d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(!Val.isNull() && "can't index into an empty vector"); 1729d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) { 1739d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(i == 0 && "tinyvector index out of range"); 1749d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return V; 1759d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 176b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 177b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth assert(i < Val.template get<VecTy*>()->size() && 1789d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner "tinyvector index out of range"); 17922e522e08640be459f237796009cf7666d6d75e7Chris Lattner return (*Val.template get<VecTy*>())[i]; 1809d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 181b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1829d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner EltTy front() const { 1839d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner assert(!empty() && "vector empty"); 1849d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) 1859d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return V; 1869d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return Val.template get<VecTy*>()->front(); 1879d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 188b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1892edc74aa1fb541253f4286a70194960dab69506bChris Lattner EltTy back() const { 1902edc74aa1fb541253f4286a70194960dab69506bChris Lattner assert(!empty() && "vector empty"); 1912edc74aa1fb541253f4286a70194960dab69506bChris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) 1922edc74aa1fb541253f4286a70194960dab69506bChris Lattner return V; 1932edc74aa1fb541253f4286a70194960dab69506bChris Lattner return Val.template get<VecTy*>()->back(); 1942edc74aa1fb541253f4286a70194960dab69506bChris Lattner } 1952edc74aa1fb541253f4286a70194960dab69506bChris Lattner 1969d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner void push_back(EltTy NewVal) { 197dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines assert(NewVal && "Can't add a null value"); 198b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 1999d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have nothing, add something. 2009d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner if (Val.isNull()) { 2019d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = NewVal; 2029d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner return; 2039d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 204b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 2059d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have a single value, convert to a vector. 20622e522e08640be459f237796009cf7666d6d75e7Chris Lattner if (EltTy V = Val.template dyn_cast<EltTy>()) { 2079d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val = new VecTy(); 2089d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val.template get<VecTy*>()->push_back(V); 2099d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 210b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 2119d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // Add the new value, we know we have a vector. 2129d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Val.template get<VecTy*>()->push_back(NewVal); 2139d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 214b4c28fc93f5149a0bd7967af44c429412e751c56Chandler Carruth 2152edc74aa1fb541253f4286a70194960dab69506bChris Lattner void pop_back() { 2162edc74aa1fb541253f4286a70194960dab69506bChris Lattner // If we have a single value, convert to empty. 2172edc74aa1fb541253f4286a70194960dab69506bChris Lattner if (Val.template is<EltTy>()) 218dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Val = (EltTy)nullptr; 2192edc74aa1fb541253f4286a70194960dab69506bChris Lattner else if (VecTy *Vec = Val.template get<VecTy*>()) 2202edc74aa1fb541253f4286a70194960dab69506bChris Lattner Vec->pop_back(); 2212edc74aa1fb541253f4286a70194960dab69506bChris Lattner } 2222edc74aa1fb541253f4286a70194960dab69506bChris Lattner 2239d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner void clear() { 2249d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have a single value, convert to empty. 225840635741f132a9a10f052cbf3b21e14bc74835aChris Lattner if (Val.template is<EltTy>()) { 226dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Val = (EltTy)nullptr; 2279d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) { 2289d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // If we have a vector form, just clear it. 2299d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner Vec->clear(); 2309d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 2319d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner // Otherwise, we're already empty. 2329d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner } 233bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis 234bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis iterator erase(iterator I) { 2350b1bcbf6b87f19402d8aef1ef9f6e527a07de9d4Chandler Carruth assert(I >= begin() && "Iterator to erase is out of bounds."); 2360b1bcbf6b87f19402d8aef1ef9f6e527a07de9d4Chandler Carruth assert(I < end() && "Erasing at past-the-end iterator."); 2370b1bcbf6b87f19402d8aef1ef9f6e527a07de9d4Chandler Carruth 238bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis // If we have a single value, convert to empty. 239bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis if (Val.template is<EltTy>()) { 240bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis if (I == begin()) 241dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Val = (EltTy)nullptr; 242bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) { 243bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis // multiple items in a vector; just do the erase, there is no 244bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis // benefit to collapsing back to a pointer 245bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis return Vec->erase(I); 246bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 24740dab1059e72d3af59f2523fa8a7d05f40dafca5Chandler Carruth return end(); 248bb07f21c76f011d8dde491104ff242af30bfb4abArgyrios Kyrtzidis } 249147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 250147d9e05116518461653695a6022f6109f0eb936Chandler Carruth iterator erase(iterator S, iterator E) { 251147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(S >= begin() && "Range to erase is out of bounds."); 252147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(S <= E && "Trying to erase invalid range."); 253147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(E <= end() && "Trying to erase past the end."); 254147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 255147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (Val.template is<EltTy>()) { 256147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (S == begin() && S != E) 257dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Val = (EltTy)nullptr; 258147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) { 259147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return Vec->erase(S, E); 260147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 261147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return end(); 262147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 263147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 264147d9e05116518461653695a6022f6109f0eb936Chandler Carruth iterator insert(iterator I, const EltTy &Elt) { 265147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I >= this->begin() && "Insertion iterator is out of bounds."); 266147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I <= this->end() && "Inserting past the end of the vector."); 267147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (I == end()) { 268147d9e05116518461653695a6022f6109f0eb936Chandler Carruth push_back(Elt); 26936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return std::prev(end()); 270147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 271147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(!Val.isNull() && "Null value with non-end insert iterator."); 272147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (EltTy V = Val.template dyn_cast<EltTy>()) { 273147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I == begin()); 274147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = Elt; 275147d9e05116518461653695a6022f6109f0eb936Chandler Carruth push_back(V); 276147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return begin(); 277147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 278147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 279147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return Val.template get<VecTy*>()->insert(I, Elt); 280147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 281147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 282147d9e05116518461653695a6022f6109f0eb936Chandler Carruth template<typename ItTy> 283147d9e05116518461653695a6022f6109f0eb936Chandler Carruth iterator insert(iterator I, ItTy From, ItTy To) { 284147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I >= this->begin() && "Insertion iterator is out of bounds."); 285147d9e05116518461653695a6022f6109f0eb936Chandler Carruth assert(I <= this->end() && "Inserting past the end of the vector."); 286147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (From == To) 287147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return I; 288147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 289147d9e05116518461653695a6022f6109f0eb936Chandler Carruth // If we have a single value, convert to a vector. 290147d9e05116518461653695a6022f6109f0eb936Chandler Carruth ptrdiff_t Offset = I - begin(); 291147d9e05116518461653695a6022f6109f0eb936Chandler Carruth if (Val.isNull()) { 29236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (std::next(From) == To) { 293147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = *From; 294147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return begin(); 295147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 296147d9e05116518461653695a6022f6109f0eb936Chandler Carruth 297147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = new VecTy(); 298147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } else if (EltTy V = Val.template dyn_cast<EltTy>()) { 299147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val = new VecTy(); 300147d9e05116518461653695a6022f6109f0eb936Chandler Carruth Val.template get<VecTy*>()->push_back(V); 301147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 302147d9e05116518461653695a6022f6109f0eb936Chandler Carruth return Val.template get<VecTy*>()->insert(begin() + Offset, From, To); 303147d9e05116518461653695a6022f6109f0eb936Chandler Carruth } 3049d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner}; 3059d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner} // end namespace llvm 3069d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner 3079d69d4aadd4a58aba5634d5c3d2c2a6d8d284134Chris Lattner#endif 308