MachineBasicBlock.h revision d4786e221c679fced994993d9ee7228572d4b148
151a8d8528135ba4e3e4cf7cd711a9e47b19078a3Chris Lattner//===-- llvm/CodeGen/MachineBasicBlock.h ------------------------*- C++ -*-===// 2ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman// 36fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// The LLVM Compiler Infrastructure 46fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell// 57ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// This file is distributed under the University of Illinois Open Source 67ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// License. See LICENSE.TXT for details. 7ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman// 86fbcc26f1460eaee4e0eb8b426fc1ff0c7af11beJohn Criswell//===----------------------------------------------------------------------===// 9ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman// 10e8b5413e5d0c7c0fc5b384e975c4ca87f4c00699Chris Lattner// Collect the sequence of machine instructions for a basic block. 11e8b5413e5d0c7c0fc5b384e975c4ca87f4c00699Chris Lattner// 1251a8d8528135ba4e3e4cf7cd711a9e47b19078a3Chris Lattner//===----------------------------------------------------------------------===// 13deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 14fce1143bcfa73f61845002fa50473d1a01384202Misha Brukman#ifndef LLVM_CODEGEN_MACHINEBASICBLOCK_H 15fce1143bcfa73f61845002fa50473d1a01384202Misha Brukman#define LLVM_CODEGEN_MACHINEBASICBLOCK_H 16deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 17c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos#include "llvm/CodeGen/MachineInstr.h" 18551ccae044b0ff658fe629dd67edd5ffe75d10e8Reid Spencer#include "llvm/ADT/GraphTraits.h" 197cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak#include "llvm/Support/DataTypes.h" 2013ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen#include <functional> 21d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 22d0fde30ce850b78371fd1386338350591f9ff494Brian Gaekenamespace llvm { 23fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman 24853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohmanclass Pass; 25fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanclass BasicBlock; 26fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanclass MachineFunction; 27a655f088b88cf015fc48721fd9869787d1b8ce13Chris Lattnerclass MCSymbol; 28f4a1e1a69f0727762a73ef0d551e3bbd16b7c04eJakob Stoklund Olesenclass SlotIndexes; 29a655f088b88cf015fc48721fd9869787d1b8ce13Chris Lattnerclass StringRef; 301cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbarclass raw_ostream; 317cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszakclass MachineBranchProbabilityInfo; 32d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 3394dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenostemplate <> 348e4018e2de52c534405d7155c7009d0b35afb861Cedric Venetstruct ilist_traits<MachineInstr> : public ilist_default_traits<MachineInstr> { 358e4018e2de52c534405d7155c7009d0b35afb861Cedric Venetprivate: 367309be6735666143bd9835b275dc8501617a2591Gabor Greif mutable ilist_half_node<MachineInstr> Sentinel; 37fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman 388e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman // this is only set by the MachineBasicBlock owning the LiveList 3994dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos friend class MachineBasicBlock; 408e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman MachineBasicBlock* Parent; 4194dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos 428e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohmanpublic: 43c7f6b8c5d40e17bf43fd3a1549d7d89c9da735e1Gabor Greif MachineInstr *createSentinel() const { 44c7f6b8c5d40e17bf43fd3a1549d7d89c9da735e1Gabor Greif return static_cast<MachineInstr*>(&Sentinel); 45c7f6b8c5d40e17bf43fd3a1549d7d89c9da735e1Gabor Greif } 46fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman void destroySentinel(MachineInstr *) const {} 4794dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos 48c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif MachineInstr *provideInitialHead() const { return createSentinel(); } 49c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif MachineInstr *ensureHead(MachineInstr*) const { return createSentinel(); } 50f3841fcbd587c31aa9842b3f33bd57de40c9f443Gabor Greif static void noteHead(MachineInstr*, MachineInstr*) {} 51c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif 52aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos void addNodeToList(MachineInstr* N); 53aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos void removeNodeFromList(MachineInstr* N); 54fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman void transferNodesFromList(ilist_traits &SrcTraits, 55fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman ilist_iterator<MachineInstr> first, 56fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman ilist_iterator<MachineInstr> last); 578e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman void deleteNode(MachineInstr *N); 58fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanprivate: 59fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman void createNode(const MachineInstr &); 6094dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos}; 6194dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos 62fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanclass MachineBasicBlock : public ilist_node<MachineBasicBlock> { 63fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman typedef ilist<MachineInstr> Instructions; 64c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos Instructions Insts; 651194e9501984daf0d3237ed1bf18a156173e7fd4Chris Lattner const BasicBlock *BB; 66c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke int Number; 67f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner MachineFunction *xParent; 687cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 6913d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// Predecessors/Successors - Keep track of the predecessor / successor 7013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// basicblocks. 7113d828567812041c1ca1817f4b66fce840903a1fEvan Cheng std::vector<MachineBasicBlock *> Predecessors; 7213d828567812041c1ca1817f4b66fce840903a1fEvan Cheng std::vector<MachineBasicBlock *> Successors; 7313d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 747cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 757cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// Weights - Keep track of the weights to the successors. This vector 767cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// has the same order as Successors, or it is empty if we don't use it 777cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// (disable optimization). 787cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak std::vector<uint32_t> Weights; 797cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak typedef std::vector<uint32_t>::iterator weight_iterator; 8025101bb2a799a36be9f077ee2fc2dcf0df2b6efbJakub Staszak typedef std::vector<uint32_t>::const_iterator const_weight_iterator; 817cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 8213d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// LiveIns - Keep track of the physical registers that are livein of 8313d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// the basicblock. 8413d828567812041c1ca1817f4b66fce840903a1fEvan Cheng std::vector<unsigned> LiveIns; 85fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 86fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// Alignment - Alignment of the basic block. Zero if the basic block does 87fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// not need to be aligned. 888c741b8064f1116d8d8dc435b60b75abdf5c4d57Jakob Stoklund Olesen /// The alignment is specified as log2(bytes). 89fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng unsigned Alignment; 908c741b8064f1116d8d8dc435b60b75abdf5c4d57Jakob Stoklund Olesen 9130b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// IsLandingPad - Indicate that this basic block is entered via an 9230b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// exception handler. 9330b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey bool IsLandingPad; 9413d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 958c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// AddressTaken - Indicate that this basic block is potentially the 968c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// target of an indirect branch. 978c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman bool AddressTaken; 988c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 99fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman // Intrusive list support 100fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman MachineBasicBlock() {} 101fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman 1028e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman explicit MachineBasicBlock(MachineFunction &mf, const BasicBlock *bb); 1038e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 1042c3f7ae3843bdc9dcfe85393e178211976c1f9bdDan Gohman ~MachineBasicBlock(); 10517fb34bf8cd10a798c9206eeef3bff151b4d3688Tanya Lattner 1068e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman // MachineBasicBlocks are allocated and owned by MachineFunction. 1078e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman friend class MachineFunction; 108ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 1098e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohmanpublic: 110d0aa0cdbc6fee00f2b2019633a9b9d00d301ac68Chris Lattner /// getBasicBlock - Return the LLVM basic block that this instance 111324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// corresponded to originally. Note that this may be NULL if this instance 112324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// does not correspond directly to an LLVM basic block. 113d0aa0cdbc6fee00f2b2019633a9b9d00d301ac68Chris Lattner /// 1141194e9501984daf0d3237ed1bf18a156173e7fd4Chris Lattner const BasicBlock *getBasicBlock() const { return BB; } 1155e61fa95196b85281eec655787e9c73267532bd1Chris Lattner 116324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// getName - Return the name of the corresponding LLVM basic block, or 117324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// "(null)". 118324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen StringRef getName() const; 119324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen 1208ceaa660bfec72249976c1f411db7f40cbc438bbAndrew Trick /// getFullName - Return a formatted string to identify this block and its 1218ceaa660bfec72249976c1f411db7f40cbc438bbAndrew Trick /// parent function. 1228ceaa660bfec72249976c1f411db7f40cbc438bbAndrew Trick std::string getFullName() const; 1238ceaa660bfec72249976c1f411db7f40cbc438bbAndrew Trick 1248c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// hasAddressTaken - Test whether this block is potentially the target 1258c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// of an indirect branch. 1268c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman bool hasAddressTaken() const { return AddressTaken; } 1278c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 1288c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// setHasAddressTaken - Set this block to reflect that it potentially 1298c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// is the target of an indirect branch. 1308c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman void setHasAddressTaken() { AddressTaken = true; } 1318c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 1325e61fa95196b85281eec655787e9c73267532bd1Chris Lattner /// getParent - Return the MachineFunction containing this basic block. 1335e61fa95196b85281eec655787e9c73267532bd1Chris Lattner /// 134f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner const MachineFunction *getParent() const { return xParent; } 135f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner MachineFunction *getParent() { return xParent; } 1365e61fa95196b85281eec655787e9c73267532bd1Chris Lattner 1377c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1387c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng /// bundle_iterator - MachineBasicBlock iterator that automatically skips over 1397c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng /// MIs that are inside bundles (i.e. walk top level MIs only). 1407c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng template<typename Ty, typename IterTy> 1417c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng class bundle_iterator 1427c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng : public std::iterator<std::bidirectional_iterator_tag, Ty, ptrdiff_t> { 1437c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng IterTy MII; 1447c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1457c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng public: 1467c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator(IterTy mii) : MII(mii) { 1477c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng assert(!MII->isInsideBundle() && 1487c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng "It's not legal to initialize bundle_iterator with a bundled MI"); 1497c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1507c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1517c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator(Ty &mi) : MII(mi) { 1527c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng assert(!mi.isInsideBundle() && 1537c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng "It's not legal to initialize bundle_iterator with a bundled MI"); 1547c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1557c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator(Ty *mi) : MII(mi) { 1567c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng assert((!mi || !mi->isInsideBundle()) && 1577c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng "It's not legal to initialize bundle_iterator with a bundled MI"); 1587c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 159d4786e221c679fced994993d9ee7228572d4b148Andrew Trick // Template allows conversion from const to nonconst. 160d4786e221c679fced994993d9ee7228572d4b148Andrew Trick template<class OtherTy, class OtherIterTy> 161d4786e221c679fced994993d9ee7228572d4b148Andrew Trick bundle_iterator(const bundle_iterator<OtherTy, OtherIterTy> &I) 162d4786e221c679fced994993d9ee7228572d4b148Andrew Trick : MII(I.getInstrIterator()) {} 1637c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator() : MII(0) {} 1647c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1657c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Ty &operator*() const { return *MII; } 1667c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Ty *operator->() const { return &operator*(); } 1677c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1687c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng operator Ty*() const { return MII; } 1697c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1707c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bool operator==(const bundle_iterator &x) const { 1717c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return MII == x.MII; 1727c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1737c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bool operator!=(const bundle_iterator &x) const { 1747c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return !operator==(x); 1757c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 17657cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 1777c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng // Increment and decrement operators... 1787c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator &operator--() { // predecrement - Back up 1797c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng do { 1807c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng --MII; 1817c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } while (MII->isInsideBundle()); 1827c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return *this; 1837c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1847c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator &operator++() { // preincrement - Advance 1857c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng do { 1867c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng ++MII; 1877c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } while (MII->isInsideBundle()); 1887c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return *this; 1897c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1907c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator operator--(int) { // postdecrement operators... 1917c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator tmp = *this; 1927c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng do { 1937c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng --MII; 1947c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } while (MII->isInsideBundle()); 1957c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return tmp; 1967c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1977c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator operator++(int) { // postincrement operators... 1987c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator tmp = *this; 1997c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng do { 2007c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng ++MII; 2017c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } while (MII->isInsideBundle()); 2027c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return tmp; 2037c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2047c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 205ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng IterTy getInstrIterator() const { 2067c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return MII; 20757cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach } 2087c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng }; 2097c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 210ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng typedef Instructions::iterator instr_iterator; 211ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng typedef Instructions::const_iterator const_instr_iterator; 212ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng typedef std::reverse_iterator<instr_iterator> reverse_instr_iterator; 2137c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef 214ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng std::reverse_iterator<const_instr_iterator> const_reverse_instr_iterator; 2157c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 2167c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef 217ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng bundle_iterator<MachineInstr,instr_iterator> iterator; 2187c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef 219ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng bundle_iterator<const MachineInstr,const_instr_iterator> const_iterator; 2207c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 2217c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef std::reverse_iterator<iterator> reverse_iterator; 2227c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 223deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 22434cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned size() const { return (unsigned)Insts.size(); } 225deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve bool empty() const { return Insts.empty(); } 226deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 227c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& front() { return Insts.front(); } 228c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& back() { return Insts.back(); } 2298e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& front() const { return Insts.front(); } 2308e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& back() const { return Insts.back(); } 231deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 232ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator instr_begin() { return Insts.begin(); } 233ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_instr_iterator instr_begin() const { return Insts.begin(); } 234ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator instr_end() { return Insts.end(); } 235ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_instr_iterator instr_end() const { return Insts.end(); } 236ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng reverse_instr_iterator instr_rbegin() { return Insts.rbegin(); } 237ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_reverse_instr_iterator instr_rbegin() const { return Insts.rbegin(); } 238ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng reverse_instr_iterator instr_rend () { return Insts.rend(); } 239ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_reverse_instr_iterator instr_rend () const { return Insts.rend(); } 2407c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 241deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator begin() { return Insts.begin(); } 242deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_iterator begin() const { return Insts.begin(); } 2437c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng iterator end() { 244ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator II = instr_end(); 245ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng if (II != instr_begin()) { 2467c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng while (II->isInsideBundle()) 2477c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng --II; 2487c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2497c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return II; 2507c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2517c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_iterator end() const { 252ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_instr_iterator II = instr_end(); 253ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng if (II != instr_begin()) { 2547c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng while (II->isInsideBundle()) 2557c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng --II; 2567c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2577c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return II; 2587c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2597c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng reverse_iterator rbegin() { 260ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng reverse_instr_iterator II = instr_rbegin(); 261ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng if (II != instr_rend()) { 2627c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng while (II->isInsideBundle()) 2637c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng ++II; 2647c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2657c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return II; 2667c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2677c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_reverse_iterator rbegin() const { 268ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_reverse_instr_iterator II = instr_rbegin(); 269ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng if (II != instr_rend()) { 2707c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng while (II->isInsideBundle()) 2717c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng ++II; 2727c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2737c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return II; 2747c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 275deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve reverse_iterator rend () { return Insts.rend(); } 276deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_reverse_iterator rend () const { return Insts.rend(); } 277deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 2787c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 27976456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG iterators 28076456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator pred_iterator; 28176456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_pred_iterator; 28276456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator succ_iterator; 28376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_succ_iterator; 2846603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 2856603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator; 2866603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 2876603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator; 2886603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 2896603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator; 2906603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 2916603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator; 292ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 293cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_begin() { return Predecessors.begin(); } 294cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_begin() const { return Predecessors.begin(); } 295cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_end() { return Predecessors.end(); } 296cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_end() const { return Predecessors.end(); } 2976603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rbegin() 2986603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 2996603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rbegin() const 3006603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 3016603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rend() 3026603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 3036603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rend() const 3046603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 30534cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned pred_size() const { 30634cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Predecessors.size(); 30734cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 308cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool pred_empty() const { return Predecessors.empty(); } 309cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_begin() { return Successors.begin(); } 310cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_begin() const { return Successors.begin(); } 311cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_end() { return Successors.end(); } 312cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_end() const { return Successors.end(); } 3136603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rbegin() 3146603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 3156603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rbegin() const 3166603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 3176603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rend() 3186603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 3196603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rend() const 3206603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 32134cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned succ_size() const { 32234cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Successors.size(); 32334cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 324cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool succ_empty() const { return Successors.empty(); } 32576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 32613d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // LiveIn management methods. 32713d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 32813d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// addLiveIn - Add the specified register as a live in. Note that it 32913d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// is an error to add the same register to the same set more than once. 33013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng void addLiveIn(unsigned Reg) { LiveIns.push_back(Reg); } 33113d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 332b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// removeLiveIn - Remove the specified register from the live in set. 333b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// 334b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng void removeLiveIn(unsigned Reg); 335b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng 336a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// isLiveIn - Return true if the specified register is in the live in set. 337a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// 338a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng bool isLiveIn(unsigned Reg) const; 339a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng 34013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // Iteration support for live in sets. These sets are kept in sorted 34113d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // order by their register number. 34281bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman typedef std::vector<unsigned>::const_iterator livein_iterator; 34381bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_begin() const { return LiveIns.begin(); } 34481bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_end() const { return LiveIns.end(); } 34513d828567812041c1ca1817f4b66fce840903a1fEvan Cheng bool livein_empty() const { return LiveIns.empty(); } 34613d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 347fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// getAlignment - Return alignment of the basic block. 3488c741b8064f1116d8d8dc435b60b75abdf5c4d57Jakob Stoklund Olesen /// The alignment is specified as log2(bytes). 349fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 350fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng unsigned getAlignment() const { return Alignment; } 351fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 352fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// setAlignment - Set alignment of the basic block. 3538c741b8064f1116d8d8dc435b60b75abdf5c4d57Jakob Stoklund Olesen /// The alignment is specified as log2(bytes). 354fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 355fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng void setAlignment(unsigned Align) { Alignment = Align; } 356fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 35730b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// isLandingPad - Returns true if the block is a landing pad. That is 35830b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 35930b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey bool isLandingPad() const { return IsLandingPad; } 36030b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 36130b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// setIsLandingPad - Indicates the block is a landing pad. That is 36230b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 363fbf5f1b72b25de35452d89a4ccd7887f79880be8Bill Wendling void setIsLandingPad(bool V = true) { IsLandingPad = V; } 36430b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 365cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen /// getLandingPadSuccessor - If this block has a successor that is a landing 366cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen /// pad, return it. Otherwise return NULL. 367cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen const MachineBasicBlock *getLandingPadSuccessor() const; 368cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen 36934ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner // Code Layout methods. 37057cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 37134ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// moveBefore/moveAfter - move 'this' block before or after the specified 37234ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// block. This only moves the block, it does not modify the CFG or adjust 37334ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// potential fall-throughs at the end of the block. 37434ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveBefore(MachineBasicBlock *NewAfter); 37534ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveAfter(MachineBasicBlock *NewBefore); 3767707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 3777707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// updateTerminator - Update the terminator instructions in block to account 3787707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// for changes to the layout. If the block previously used a fallthrough, 3797707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// it may now need a branch, and if it previously used branching it may now 3807707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// be able to use a fallthrough. 3817707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach void updateTerminator(); 3827707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 38376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG mutators 3847cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 38576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// addSuccessor - Add succ as a successor of this MachineBasicBlock. 3867cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// The Predecessors list of succ is automatically updated. WEIGHT 3877cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// parameter is stored in Weights list and it may be used by 3887cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// MachineBranchProbabilityInfo analysis to calculate branch probability. 38976456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 3907cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak void addSuccessor(MachineBasicBlock *succ, uint32_t weight = 0); 39176456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 392dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove successor from the successors list of this 39376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// MachineBasicBlock. The Predecessors list of succ is automatically updated. 39476456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 3953dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removeSuccessor(MachineBasicBlock *succ); 396dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner 397dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove specified successor from the successors list of 398dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// this MachineBasicBlock. The Predecessors list of succ is automatically 3998a46d342d8cbca7c9c7be6c66007d41329babad0David Greene /// updated. Return the iterator to the element after the one removed. 400dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// 4018a46d342d8cbca7c9c7be6c66007d41329babad0David Greene succ_iterator removeSuccessor(succ_iterator I); 4027cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 4037cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// replaceSuccessor - Replace successor OLD with NEW and update weight info. 4047cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// 4057cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak void replaceSuccessor(MachineBasicBlock *Old, MachineBasicBlock *New); 4067cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 4077cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 40863307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// transferSuccessors - Transfers all the successors from MBB to this 40963307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// machine basic block (i.e., copies all the successors fromMBB and 4101edb8e0910db4cda46a81a4abad80a2a755442aaDan Gohman /// remove all the successors from fromMBB). 41163307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang void transferSuccessors(MachineBasicBlock *fromMBB); 41214152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman 41314152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// transferSuccessorsAndUpdatePHIs - Transfers all the successors, as 41414152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// in transferSuccessors, and update PHI operands in the successor blocks 41514152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// which refer to fromMBB to refer to this. 41614152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman void transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB); 41757cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 418cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// isSuccessor - Return true if the specified MBB is a successor of this 419cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// block. 4206d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isSuccessor(const MachineBasicBlock *MBB) const; 42176456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 4226ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// isLayoutSuccessor - Return true if the specified MBB will be emitted 4236ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// immediately after this block, such that if this block exits by 4246ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// falling through, control will transfer to the specified MBB. Note 4256ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// that MBB need not be a successor at all, for example if this block 4266ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// ends with an unconditional branch to some other block. 4276d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isLayoutSuccessor(const MachineBasicBlock *MBB) const; 4286ade6f55a836129af634074e96f660ff23f59a30Dan Gohman 42915acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// canFallThrough - Return true if the block can implicitly transfer 43015acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// control to the block after it by falling off the end of it. This should 43115acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// return false if it can reach the block after it, but it uses an explicit 43215acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// branch to do so (e.g., a table jump). True is a conservative answer. 43315acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson bool canFallThrough(); 43415acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson 43557cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach /// Returns a pointer to the first instructon in this block that is not a 436d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// PHINode instruction. When adding instruction to the beginning of the 437d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// basic block, they should be added before the returned value, not before 438d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// the first instruction, which might be PHI. 439d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// Returns end() is there's no non-PHI instruction. 440d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman iterator getFirstNonPHI(); 441d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman 44292095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// SkipPHIsAndLabels - Return the first instruction in MBB after I that is 44392095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// not a PHI or a label. This is the correct point to insert copies at the 44492095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// beginning of a basic block. 44592095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen iterator SkipPHIsAndLabels(iterator I); 44692095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen 447743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// getFirstTerminator - returns an iterator to the first terminator 448743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// instruction of this basic block. If a terminator does not exist, 449743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// it returns end() 450743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos iterator getFirstTerminator(); 4517c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_iterator getFirstTerminator() const; 452743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos 453ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// getFirstInstrTerminator - Same getFirstTerminator but it ignores bundles 454ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// and return an instr_iterator instead. 455ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator getFirstInstrTerminator(); 4561a7744501a80351ce31fcecad42c8e35823bc081Jakob Stoklund Olesen 4574f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen /// getLastNonDebugInstr - returns an iterator to the last non-debug 4584f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen /// instruction in the basic block, or end() 4594f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen iterator getLastNonDebugInstr(); 4607c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_iterator getLastNonDebugInstr() const; 461adb877d62e5ac88db037d91bcd2e9f7dc2c4cd7aJakob Stoklund Olesen 462853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// SplitCriticalEdge - Split the critical edge from this block to the 463853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// given successor block, and return the newly created block, or null 464853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// if splitting is not possible. 465853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// 466853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// This function updates LiveVariables, MachineDominatorTree, and 467853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// MachineLoopInfo, as applicable. 468853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman MachineBasicBlock *SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P); 469853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman 4700bbcd6bfd1a90c2aa7386a88ba9fc9aba47d03a7Brian Gaeke void pop_front() { Insts.pop_front(); } 471f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void pop_back() { Insts.pop_back(); } 472deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve void push_back(MachineInstr *MI) { Insts.push_back(MI); } 4737c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 474deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve template<typename IT> 475ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void insert(instr_iterator I, IT S, IT E) { 4767c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Insts.insert(I, S, E); 4777c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 478ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator insert(instr_iterator I, MachineInstr *M) { 4797c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return Insts.insert(I, M); 4807c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 48157cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach instr_iterator insertAfter(instr_iterator I, MachineInstr *M) { 48257cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach return Insts.insertAfter(I, M); 483704b07613eb16b7ffb8c8cbc94482bf7425ccd77Devang Patel } 484deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 4857c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng template<typename IT> 4867c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng void insert(iterator I, IT S, IT E) { 487ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng Insts.insert(I.getInstrIterator(), S, E); 4887c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 4897c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng iterator insert(iterator I, MachineInstr *M) { 490ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return Insts.insert(I.getInstrIterator(), M); 4917c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 49257cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach iterator insertAfter(iterator I, MachineInstr *M) { 49357cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach return Insts.insertAfter(I.getInstrIterator(), M); 4947c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 4957c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 496ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// erase - Remove the specified element or range from the instruction list. 497ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// These functions delete any instructions removed. 498ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// 499ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator erase(instr_iterator I) { 5007c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return Insts.erase(I); 5017c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 502ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator erase(instr_iterator I, instr_iterator E) { 5037c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return Insts.erase(I, E); 5047c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 505ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator erase_instr(MachineInstr *I) { 506ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator MII(I); 507ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return erase(MII); 5087c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 509ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng 510ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng iterator erase(iterator I); 5117c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng iterator erase(iterator I, iterator E) { 512ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return Insts.erase(I.getInstrIterator(), E.getInstrIterator()); 513ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng } 514ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng iterator erase(MachineInstr *I) { 515ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng iterator MII(I); 516ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return erase(MII); 5177c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 5187c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 519ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// remove - Remove the instruction from the instruction list. This function 520ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// does not delete the instruction. WARNING: Note, if the specified 521ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// instruction is a bundle this function will remove all the bundled 522ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// instructions as well. It is up to the caller to keep a list of the 523ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// bundled instructions and re-insert them if desired. This function is 524b5e8b8c8f762ae9a95f52a477440e426622d5446Chris Lattner /// *not recommended* for manipulating instructions with bundles. Use 525ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// splice instead. 526ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng MachineInstr *remove(MachineInstr *I); 527ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void clear() { 528ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng Insts.clear(); 529ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng } 530ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 531c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// splice - Take an instruction from MBB 'Other' at the position From, 532c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// and insert it into this MBB right before 'where'. 533ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void splice(instr_iterator where, MachineBasicBlock *Other, 534ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator From) { 535c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman Insts.splice(where, Other->Insts, From); 536c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman } 537ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void splice(iterator where, MachineBasicBlock *Other, iterator From); 538c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman 539f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// splice - Take a block of instructions from MBB 'Other' in the range [From, 540f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// To), and insert them into this MBB right before 'where'. 541ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void splice(instr_iterator where, MachineBasicBlock *Other, instr_iterator From, 542ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator To) { 5437c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Insts.splice(where, Other->Insts, From, To); 5447c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 545f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void splice(iterator where, MachineBasicBlock *Other, iterator From, 546f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner iterator To) { 547ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng Insts.splice(where.getInstrIterator(), Other->Insts, 548ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng From.getInstrIterator(), To.getInstrIterator()); 549f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner } 5508e7ae9860bd1f29c95e4e10fe151a22aaafafef9Chris Lattner 5518e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// removeFromParent - This method unlinks 'this' from the containing 5528e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function, and returns it, but does not delete it. 5538e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman MachineBasicBlock *removeFromParent(); 55457cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 5558e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// eraseFromParent - This method unlinks 'this' from the containing 5568e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function and deletes it. 5578e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman void eraseFromParent(); 5588e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 5590370fad74b48388412c52d1325512f2c218487faEvan Cheng /// ReplaceUsesOfBlockWith - Given a machine basic block that branched to 5600370fad74b48388412c52d1325512f2c218487faEvan Cheng /// 'Old', change the code and CFG so that it branches to 'New' instead. 5610370fad74b48388412c52d1325512f2c218487faEvan Cheng void ReplaceUsesOfBlockWith(MachineBasicBlock *Old, MachineBasicBlock *New); 5620370fad74b48388412c52d1325512f2c218487faEvan Cheng 5632bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// CorrectExtraCFGEdges - Various pieces of code can cause excess edges in 5642bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// the CFG to be inserted. If we have proven that MBB can only branch to 5652bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestA and DestB, remove any other MBB successors from the CFG. DestA and 5662bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestB can be null. Besides DestA and DestB, retain other edges leading 5672bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// to LandingPads (currently there can be only one; we don't check or require 5682bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// that here). Note it is possible that DestA and/or DestB are LandingPads. 5692bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool CorrectExtraCFGEdges(MachineBasicBlock *DestA, 5702bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng MachineBasicBlock *DestB, 5712bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool isCond); 5722bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng 57373e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen /// findDebugLoc - find the next valid DebugLoc starting at MBBI, skipping 5743b1906f48d0b541e5be0bc1918c94a454e908bc0Dale Johannesen /// any DBG_VALUE instructions. Return UnknownLoc if there is none. 575ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng DebugLoc findDebugLoc(instr_iterator MBBI); 5767c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng DebugLoc findDebugLoc(iterator MBBI) { 577ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return findDebugLoc(MBBI.getInstrIterator()); 5787c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 57973e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen 580f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke // Debugging methods. 581f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke void dump() const; 582f4a1e1a69f0727762a73ef0d551e3bbd16b7c04eJakob Stoklund Olesen void print(raw_ostream &OS, SlotIndexes* = 0) const; 583f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke 584da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// getNumber - MachineBasicBlocks are uniquely numbered at the function 585da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// level, unless they're not in a MachineFunction yet, in which case this 586da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// will return -1. 587da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// 588c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke int getNumber() const { return Number; } 58920a6d8e63056cc2025e7143a5f7226e079e0bc80Chris Lattner void setNumber(int N) { Number = N; } 590c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke 591f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// getSymbol - Return the MCSymbol for this basic block. 592f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// 5931b2eb0e8a6aaf034675b17be6d853cb1c666200fChris Lattner MCSymbol *getSymbol() const; 5947cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5957cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5967cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszakprivate: 5977cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// getWeightIterator - Return weight iterator corresponding to the I 5987cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// successor iterator. 5997cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak weight_iterator getWeightIterator(succ_iterator I); 60025101bb2a799a36be9f077ee2fc2dcf0df2b6efbJakub Staszak const_weight_iterator getWeightIterator(const_succ_iterator I) const; 6017cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 6027cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak friend class MachineBranchProbabilityInfo; 6037cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 6047cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// getSuccWeight - Return weight of the edge from this block to MBB. This 6057cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// method should NOT be called directly, but by using getEdgeWeight method 6067cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// from MachineBranchProbabilityInfo class. 60725101bb2a799a36be9f077ee2fc2dcf0df2b6efbJakub Staszak uint32_t getSuccWeight(const MachineBasicBlock *succ) const; 6087cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 6097cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 6107cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak // Methods used to maintain doubly linked list of blocks... 611fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman friend struct ilist_traits<MachineBasicBlock>; 6128560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 6138560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke // Machine-CFG mutators 6148560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 6158560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// addPredecessor - Remove pred as a predecessor of this MachineBasicBlock. 6168560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// Don't do this unless you know what you're doing, because it doesn't 6178560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// update pred's successors list. Use pred->addSuccessor instead. 6188560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 6193dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void addPredecessor(MachineBasicBlock *pred); 6208560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 6218560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// removePredecessor - Remove pred as a predecessor of this 6228560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// MachineBasicBlock. Don't do this unless you know what you're 6238560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// doing, because it doesn't update pred's successors list. Use 6248560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// pred->removeSuccessor instead. 6258560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 6263dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removePredecessor(MachineBasicBlock *pred); 627deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve}; 628deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 6291cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbarraw_ostream& operator<<(raw_ostream &OS, const MachineBasicBlock &MBB); 6300aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6312a085c34933a6c76e5a86f2680d93c16b0438801Evan Chengvoid WriteAsOperand(raw_ostream &, const MachineBasicBlock*, bool t); 6322a085c34933a6c76e5a86f2680d93c16b0438801Evan Cheng 63313ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen// This is useful when building IndexedMaps keyed on basic block pointers. 63413ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesenstruct MBB2NumberFunctor : 63513ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen public std::unary_function<const MachineBasicBlock*, unsigned> { 63613ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen unsigned operator()(const MachineBasicBlock *MBB) const { 63713ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen return MBB->getNumber(); 63813ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen } 63913ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen}; 64013ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen 6410aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 6420aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// GraphTraits specializations for machine basic block graphs (machine-CFGs) 6430aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 6440aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6450aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 6460aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... 6470aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 6480aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6490aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<MachineBasicBlock *> { 6500aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 6510aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::succ_iterator ChildIteratorType; 6520aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6530aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(MachineBasicBlock *BB) { return BB; } 654ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6550aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 6560aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 657ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6580aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 6590aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6600aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 6610aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6620aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<const MachineBasicBlock *> { 6630aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 6640aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_succ_iterator ChildIteratorType; 6650aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6660aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(const MachineBasicBlock *BB) { return BB; } 667ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6680aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 6690aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 670ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6710aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 6720aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6730aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 6740aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6750aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 6760aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... and to walk it 6770aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// in inverse order. Inverse order for a function is considered 6780aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// to be when traversing the predecessor edges of a MBB 6790aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// instead of the successor edges. 6800aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 6810aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<MachineBasicBlock*> > { 6820aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 6830aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::pred_iterator ChildIteratorType; 6840aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<MachineBasicBlock *> G) { 6850aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return G.Graph; 6860aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 687ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6880aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 6890aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 690ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6910aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 6920aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6930aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 6940aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6950aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<const MachineBasicBlock*> > { 6960aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 6970aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_pred_iterator ChildIteratorType; 6980aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<const MachineBasicBlock*> G) { 699ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman return G.Graph; 7000aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 701ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 7020aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 7030aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 704ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 7050aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 7060aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 7070aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 7080aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 709d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke} // End llvm namespace 710deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 711deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve#endif 712