MachineBasicBlock.h revision 57cae881e2b6c85a562d3fd2a7f10bf9d7921b40
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 1208c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// hasAddressTaken - Test whether this block is potentially the target 1218c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// of an indirect branch. 1228c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman bool hasAddressTaken() const { return AddressTaken; } 1238c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 1248c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// setHasAddressTaken - Set this block to reflect that it potentially 1258c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// is the target of an indirect branch. 1268c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman void setHasAddressTaken() { AddressTaken = true; } 1278c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 1285e61fa95196b85281eec655787e9c73267532bd1Chris Lattner /// getParent - Return the MachineFunction containing this basic block. 1295e61fa95196b85281eec655787e9c73267532bd1Chris Lattner /// 130f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner const MachineFunction *getParent() const { return xParent; } 131f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner MachineFunction *getParent() { return xParent; } 1325e61fa95196b85281eec655787e9c73267532bd1Chris Lattner 1337c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1347c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng /// bundle_iterator - MachineBasicBlock iterator that automatically skips over 1357c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng /// MIs that are inside bundles (i.e. walk top level MIs only). 1367c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng template<typename Ty, typename IterTy> 1377c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng class bundle_iterator 1387c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng : public std::iterator<std::bidirectional_iterator_tag, Ty, ptrdiff_t> { 1397c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng IterTy MII; 1407c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1417c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng public: 1427c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator(IterTy mii) : MII(mii) { 1437c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng assert(!MII->isInsideBundle() && 1447c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng "It's not legal to initialize bundle_iterator with a bundled MI"); 1457c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1467c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1477c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator(Ty &mi) : MII(mi) { 1487c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng assert(!mi.isInsideBundle() && 1497c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng "It's not legal to initialize bundle_iterator with a bundled MI"); 1507c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1517c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator(Ty *mi) : MII(mi) { 1527c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng assert((!mi || !mi->isInsideBundle()) && 1537c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng "It's not legal to initialize bundle_iterator with a bundled MI"); 1547c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1557c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator(const bundle_iterator &I) : MII(I.MII) {} 1567c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator() : MII(0) {} 1577c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1587c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Ty &operator*() const { return *MII; } 1597c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Ty *operator->() const { return &operator*(); } 1607c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1617c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng operator Ty*() const { return MII; } 1627c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1637c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bool operator==(const bundle_iterator &x) const { 1647c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return MII == x.MII; 1657c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1667c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bool operator!=(const bundle_iterator &x) const { 1677c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return !operator==(x); 1687c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 16957cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 1707c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng // Increment and decrement operators... 1717c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator &operator--() { // predecrement - Back up 1727c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng do { 1737c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng --MII; 1747c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } while (MII->isInsideBundle()); 1757c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return *this; 1767c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1777c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator &operator++() { // preincrement - Advance 1787c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng do { 1797c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng ++MII; 1807c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } while (MII->isInsideBundle()); 1817c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return *this; 1827c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1837c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator operator--(int) { // postdecrement operators... 1847c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator tmp = *this; 1857c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng do { 1867c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng --MII; 1877c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } while (MII->isInsideBundle()); 1887c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return tmp; 1897c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1907c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator operator++(int) { // postincrement 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 198ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng IterTy getInstrIterator() const { 1997c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return MII; 20057cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach } 2017c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng }; 2027c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 203ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng typedef Instructions::iterator instr_iterator; 204ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng typedef Instructions::const_iterator const_instr_iterator; 205ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng typedef std::reverse_iterator<instr_iterator> reverse_instr_iterator; 2067c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef 207ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng std::reverse_iterator<const_instr_iterator> const_reverse_instr_iterator; 2087c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 2097c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef 210ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng bundle_iterator<MachineInstr,instr_iterator> iterator; 2117c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef 212ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng bundle_iterator<const MachineInstr,const_instr_iterator> const_iterator; 2137c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 2147c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef std::reverse_iterator<iterator> reverse_iterator; 2157c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 216deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 21734cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned size() const { return (unsigned)Insts.size(); } 218deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve bool empty() const { return Insts.empty(); } 219deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 220c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& front() { return Insts.front(); } 221c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& back() { return Insts.back(); } 2228e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& front() const { return Insts.front(); } 2238e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& back() const { return Insts.back(); } 224deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 225ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator instr_begin() { return Insts.begin(); } 226ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_instr_iterator instr_begin() const { return Insts.begin(); } 227ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator instr_end() { return Insts.end(); } 228ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_instr_iterator instr_end() const { return Insts.end(); } 229ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng reverse_instr_iterator instr_rbegin() { return Insts.rbegin(); } 230ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_reverse_instr_iterator instr_rbegin() const { return Insts.rbegin(); } 231ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng reverse_instr_iterator instr_rend () { return Insts.rend(); } 232ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_reverse_instr_iterator instr_rend () const { return Insts.rend(); } 2337c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 234deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator begin() { return Insts.begin(); } 235deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_iterator begin() const { return Insts.begin(); } 2367c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng iterator end() { 237ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator II = instr_end(); 238ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng if (II != instr_begin()) { 2397c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng while (II->isInsideBundle()) 2407c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng --II; 2417c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2427c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return II; 2437c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2447c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_iterator end() const { 245ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_instr_iterator II = instr_end(); 246ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng if (II != instr_begin()) { 2477c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng while (II->isInsideBundle()) 2487c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng --II; 2497c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2507c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return II; 2517c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2527c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng reverse_iterator rbegin() { 253ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng reverse_instr_iterator II = instr_rbegin(); 254ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng if (II != instr_rend()) { 2557c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng while (II->isInsideBundle()) 2567c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng ++II; 2577c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2587c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return II; 2597c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2607c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_reverse_iterator rbegin() const { 261ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_reverse_instr_iterator II = instr_rbegin(); 262ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng if (II != instr_rend()) { 2637c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng while (II->isInsideBundle()) 2647c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng ++II; 2657c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 2667c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return II; 2677c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 268deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve reverse_iterator rend () { return Insts.rend(); } 269deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_reverse_iterator rend () const { return Insts.rend(); } 270deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 2717c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 27276456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG iterators 27376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator pred_iterator; 27476456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_pred_iterator; 27576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator succ_iterator; 27676456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_succ_iterator; 2776603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 2786603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator; 2796603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 2806603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator; 2816603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 2826603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator; 2836603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 2846603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator; 285ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 286cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_begin() { return Predecessors.begin(); } 287cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_begin() const { return Predecessors.begin(); } 288cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_end() { return Predecessors.end(); } 289cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_end() const { return Predecessors.end(); } 2906603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rbegin() 2916603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 2926603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rbegin() const 2936603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 2946603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rend() 2956603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 2966603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rend() const 2976603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 29834cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned pred_size() const { 29934cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Predecessors.size(); 30034cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 301cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool pred_empty() const { return Predecessors.empty(); } 302cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_begin() { return Successors.begin(); } 303cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_begin() const { return Successors.begin(); } 304cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_end() { return Successors.end(); } 305cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_end() const { return Successors.end(); } 3066603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rbegin() 3076603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 3086603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rbegin() const 3096603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 3106603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rend() 3116603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 3126603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rend() const 3136603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 31434cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned succ_size() const { 31534cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Successors.size(); 31634cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 317cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool succ_empty() const { return Successors.empty(); } 31876456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 31913d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // LiveIn management methods. 32013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 32113d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// addLiveIn - Add the specified register as a live in. Note that it 32213d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// is an error to add the same register to the same set more than once. 32313d828567812041c1ca1817f4b66fce840903a1fEvan Cheng void addLiveIn(unsigned Reg) { LiveIns.push_back(Reg); } 32413d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 325b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// removeLiveIn - Remove the specified register from the live in set. 326b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// 327b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng void removeLiveIn(unsigned Reg); 328b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng 329a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// isLiveIn - Return true if the specified register is in the live in set. 330a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// 331a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng bool isLiveIn(unsigned Reg) const; 332a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng 33313d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // Iteration support for live in sets. These sets are kept in sorted 33413d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // order by their register number. 33581bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman typedef std::vector<unsigned>::const_iterator livein_iterator; 33681bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_begin() const { return LiveIns.begin(); } 33781bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_end() const { return LiveIns.end(); } 33813d828567812041c1ca1817f4b66fce840903a1fEvan Cheng bool livein_empty() const { return LiveIns.empty(); } 33913d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 340fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// getAlignment - Return alignment of the basic block. 3418c741b8064f1116d8d8dc435b60b75abdf5c4d57Jakob Stoklund Olesen /// The alignment is specified as log2(bytes). 342fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 343fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng unsigned getAlignment() const { return Alignment; } 344fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 345fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// setAlignment - Set alignment of the basic block. 3468c741b8064f1116d8d8dc435b60b75abdf5c4d57Jakob Stoklund Olesen /// The alignment is specified as log2(bytes). 347fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 348fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng void setAlignment(unsigned Align) { Alignment = Align; } 349fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 35030b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// isLandingPad - Returns true if the block is a landing pad. That is 35130b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 35230b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey bool isLandingPad() const { return IsLandingPad; } 35330b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 35430b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// setIsLandingPad - Indicates the block is a landing pad. That is 35530b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 356fbf5f1b72b25de35452d89a4ccd7887f79880be8Bill Wendling void setIsLandingPad(bool V = true) { IsLandingPad = V; } 35730b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 358cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen /// getLandingPadSuccessor - If this block has a successor that is a landing 359cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen /// pad, return it. Otherwise return NULL. 360cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen const MachineBasicBlock *getLandingPadSuccessor() const; 361cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen 36234ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner // Code Layout methods. 36357cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 36434ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// moveBefore/moveAfter - move 'this' block before or after the specified 36534ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// block. This only moves the block, it does not modify the CFG or adjust 36634ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// potential fall-throughs at the end of the block. 36734ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveBefore(MachineBasicBlock *NewAfter); 36834ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveAfter(MachineBasicBlock *NewBefore); 3697707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 3707707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// updateTerminator - Update the terminator instructions in block to account 3717707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// for changes to the layout. If the block previously used a fallthrough, 3727707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// it may now need a branch, and if it previously used branching it may now 3737707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// be able to use a fallthrough. 3747707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach void updateTerminator(); 3757707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 37676456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG mutators 3777cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 37876456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// addSuccessor - Add succ as a successor of this MachineBasicBlock. 3797cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// The Predecessors list of succ is automatically updated. WEIGHT 3807cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// parameter is stored in Weights list and it may be used by 3817cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// MachineBranchProbabilityInfo analysis to calculate branch probability. 38276456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 3837cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak void addSuccessor(MachineBasicBlock *succ, uint32_t weight = 0); 38476456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 385dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove successor from the successors list of this 38676456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// MachineBasicBlock. The Predecessors list of succ is automatically updated. 38776456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 3883dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removeSuccessor(MachineBasicBlock *succ); 389dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner 390dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove specified successor from the successors list of 391dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// this MachineBasicBlock. The Predecessors list of succ is automatically 3928a46d342d8cbca7c9c7be6c66007d41329babad0David Greene /// updated. Return the iterator to the element after the one removed. 393dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// 3948a46d342d8cbca7c9c7be6c66007d41329babad0David Greene succ_iterator removeSuccessor(succ_iterator I); 3957cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 3967cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// replaceSuccessor - Replace successor OLD with NEW and update weight info. 3977cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// 3987cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak void replaceSuccessor(MachineBasicBlock *Old, MachineBasicBlock *New); 3997cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 4007cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 40163307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// transferSuccessors - Transfers all the successors from MBB to this 40263307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// machine basic block (i.e., copies all the successors fromMBB and 4031edb8e0910db4cda46a81a4abad80a2a755442aaDan Gohman /// remove all the successors from fromMBB). 40463307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang void transferSuccessors(MachineBasicBlock *fromMBB); 40514152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman 40614152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// transferSuccessorsAndUpdatePHIs - Transfers all the successors, as 40714152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// in transferSuccessors, and update PHI operands in the successor blocks 40814152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// which refer to fromMBB to refer to this. 40914152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman void transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB); 41057cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 411cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// isSuccessor - Return true if the specified MBB is a successor of this 412cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// block. 4136d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isSuccessor(const MachineBasicBlock *MBB) const; 41476456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 4156ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// isLayoutSuccessor - Return true if the specified MBB will be emitted 4166ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// immediately after this block, such that if this block exits by 4176ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// falling through, control will transfer to the specified MBB. Note 4186ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// that MBB need not be a successor at all, for example if this block 4196ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// ends with an unconditional branch to some other block. 4206d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isLayoutSuccessor(const MachineBasicBlock *MBB) const; 4216ade6f55a836129af634074e96f660ff23f59a30Dan Gohman 42215acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// canFallThrough - Return true if the block can implicitly transfer 42315acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// control to the block after it by falling off the end of it. This should 42415acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// return false if it can reach the block after it, but it uses an explicit 42515acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// branch to do so (e.g., a table jump). True is a conservative answer. 42615acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson bool canFallThrough(); 42715acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson 42857cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach /// Returns a pointer to the first instructon in this block that is not a 429d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// PHINode instruction. When adding instruction to the beginning of the 430d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// basic block, they should be added before the returned value, not before 431d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// the first instruction, which might be PHI. 432d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// Returns end() is there's no non-PHI instruction. 433d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman iterator getFirstNonPHI(); 434d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman 43592095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// SkipPHIsAndLabels - Return the first instruction in MBB after I that is 43692095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// not a PHI or a label. This is the correct point to insert copies at the 43792095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// beginning of a basic block. 43892095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen iterator SkipPHIsAndLabels(iterator I); 43992095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen 440743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// getFirstTerminator - returns an iterator to the first terminator 441743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// instruction of this basic block. If a terminator does not exist, 442743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// it returns end() 443743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos iterator getFirstTerminator(); 4447c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_iterator getFirstTerminator() const; 445743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos 446ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// getFirstInstrTerminator - Same getFirstTerminator but it ignores bundles 447ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// and return an instr_iterator instead. 448ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator getFirstInstrTerminator(); 4491a7744501a80351ce31fcecad42c8e35823bc081Jakob Stoklund Olesen 4504f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen /// getLastNonDebugInstr - returns an iterator to the last non-debug 4514f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen /// instruction in the basic block, or end() 4524f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen iterator getLastNonDebugInstr(); 4537c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_iterator getLastNonDebugInstr() const; 454adb877d62e5ac88db037d91bcd2e9f7dc2c4cd7aJakob Stoklund Olesen 455853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// SplitCriticalEdge - Split the critical edge from this block to the 456853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// given successor block, and return the newly created block, or null 457853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// if splitting is not possible. 458853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// 459853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// This function updates LiveVariables, MachineDominatorTree, and 460853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// MachineLoopInfo, as applicable. 461853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman MachineBasicBlock *SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P); 462853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman 4630bbcd6bfd1a90c2aa7386a88ba9fc9aba47d03a7Brian Gaeke void pop_front() { Insts.pop_front(); } 464f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void pop_back() { Insts.pop_back(); } 465deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve void push_back(MachineInstr *MI) { Insts.push_back(MI); } 4667c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 467deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve template<typename IT> 468ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void insert(instr_iterator I, IT S, IT E) { 4697c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Insts.insert(I, S, E); 4707c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 471ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator insert(instr_iterator I, MachineInstr *M) { 4727c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return Insts.insert(I, M); 4737c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 47457cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach instr_iterator insertAfter(instr_iterator I, MachineInstr *M) { 47557cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach return Insts.insertAfter(I, M); 476704b07613eb16b7ffb8c8cbc94482bf7425ccd77Devang Patel } 477deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 4787c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng template<typename IT> 4797c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng void insert(iterator I, IT S, IT E) { 480ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng Insts.insert(I.getInstrIterator(), S, E); 4817c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 4827c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng iterator insert(iterator I, MachineInstr *M) { 483ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return Insts.insert(I.getInstrIterator(), M); 4847c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 48557cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach iterator insertAfter(iterator I, MachineInstr *M) { 48657cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach return Insts.insertAfter(I.getInstrIterator(), M); 4877c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 4887c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 489ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// erase - Remove the specified element or range from the instruction list. 490ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// These functions delete any instructions removed. 491ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// 492ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator erase(instr_iterator I) { 4937c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return Insts.erase(I); 4947c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 495ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator erase(instr_iterator I, instr_iterator E) { 4967c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return Insts.erase(I, E); 4977c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 498ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator erase_instr(MachineInstr *I) { 499ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator MII(I); 500ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return erase(MII); 5017c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 502ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng 503ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng iterator erase(iterator I); 5047c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng iterator erase(iterator I, iterator E) { 505ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return Insts.erase(I.getInstrIterator(), E.getInstrIterator()); 506ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng } 507ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng iterator erase(MachineInstr *I) { 508ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng iterator MII(I); 509ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return erase(MII); 5107c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 5117c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 512ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// remove - Remove the instruction from the instruction list. This function 513ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// does not delete the instruction. WARNING: Note, if the specified 514ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// instruction is a bundle this function will remove all the bundled 515ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// instructions as well. It is up to the caller to keep a list of the 516ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// bundled instructions and re-insert them if desired. This function is 517b5e8b8c8f762ae9a95f52a477440e426622d5446Chris Lattner /// *not recommended* for manipulating instructions with bundles. Use 518ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// splice instead. 519ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng MachineInstr *remove(MachineInstr *I); 520ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void clear() { 521ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng Insts.clear(); 522ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng } 523ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 524c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// splice - Take an instruction from MBB 'Other' at the position From, 525c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// and insert it into this MBB right before 'where'. 526ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void splice(instr_iterator where, MachineBasicBlock *Other, 527ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator From) { 528c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman Insts.splice(where, Other->Insts, From); 529c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman } 530ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void splice(iterator where, MachineBasicBlock *Other, iterator From); 531c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman 532f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// splice - Take a block of instructions from MBB 'Other' in the range [From, 533f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// To), and insert them into this MBB right before 'where'. 534ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void splice(instr_iterator where, MachineBasicBlock *Other, instr_iterator From, 535ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator To) { 5367c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Insts.splice(where, Other->Insts, From, To); 5377c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 538f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void splice(iterator where, MachineBasicBlock *Other, iterator From, 539f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner iterator To) { 540ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng Insts.splice(where.getInstrIterator(), Other->Insts, 541ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng From.getInstrIterator(), To.getInstrIterator()); 542f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner } 5438e7ae9860bd1f29c95e4e10fe151a22aaafafef9Chris Lattner 5448e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// removeFromParent - This method unlinks 'this' from the containing 5458e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function, and returns it, but does not delete it. 5468e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman MachineBasicBlock *removeFromParent(); 54757cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 5488e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// eraseFromParent - This method unlinks 'this' from the containing 5498e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function and deletes it. 5508e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman void eraseFromParent(); 5518e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 5520370fad74b48388412c52d1325512f2c218487faEvan Cheng /// ReplaceUsesOfBlockWith - Given a machine basic block that branched to 5530370fad74b48388412c52d1325512f2c218487faEvan Cheng /// 'Old', change the code and CFG so that it branches to 'New' instead. 5540370fad74b48388412c52d1325512f2c218487faEvan Cheng void ReplaceUsesOfBlockWith(MachineBasicBlock *Old, MachineBasicBlock *New); 5550370fad74b48388412c52d1325512f2c218487faEvan Cheng 5562bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// CorrectExtraCFGEdges - Various pieces of code can cause excess edges in 5572bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// the CFG to be inserted. If we have proven that MBB can only branch to 5582bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestA and DestB, remove any other MBB successors from the CFG. DestA and 5592bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestB can be null. Besides DestA and DestB, retain other edges leading 5602bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// to LandingPads (currently there can be only one; we don't check or require 5612bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// that here). Note it is possible that DestA and/or DestB are LandingPads. 5622bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool CorrectExtraCFGEdges(MachineBasicBlock *DestA, 5632bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng MachineBasicBlock *DestB, 5642bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool isCond); 5652bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng 56673e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen /// findDebugLoc - find the next valid DebugLoc starting at MBBI, skipping 5673b1906f48d0b541e5be0bc1918c94a454e908bc0Dale Johannesen /// any DBG_VALUE instructions. Return UnknownLoc if there is none. 568ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng DebugLoc findDebugLoc(instr_iterator MBBI); 5697c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng DebugLoc findDebugLoc(iterator MBBI) { 570ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return findDebugLoc(MBBI.getInstrIterator()); 5717c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 57273e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen 573f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke // Debugging methods. 574f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke void dump() const; 575f4a1e1a69f0727762a73ef0d551e3bbd16b7c04eJakob Stoklund Olesen void print(raw_ostream &OS, SlotIndexes* = 0) const; 576f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke 577da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// getNumber - MachineBasicBlocks are uniquely numbered at the function 578da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// level, unless they're not in a MachineFunction yet, in which case this 579da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// will return -1. 580da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// 581c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke int getNumber() const { return Number; } 58220a6d8e63056cc2025e7143a5f7226e079e0bc80Chris Lattner void setNumber(int N) { Number = N; } 583c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke 584f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// getSymbol - Return the MCSymbol for this basic block. 585f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// 5861b2eb0e8a6aaf034675b17be6d853cb1c666200fChris Lattner MCSymbol *getSymbol() const; 5877cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5887cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5897cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszakprivate: 5907cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// getWeightIterator - Return weight iterator corresponding to the I 5917cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// successor iterator. 5927cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak weight_iterator getWeightIterator(succ_iterator I); 59325101bb2a799a36be9f077ee2fc2dcf0df2b6efbJakub Staszak const_weight_iterator getWeightIterator(const_succ_iterator I) const; 5947cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5957cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak friend class MachineBranchProbabilityInfo; 5967cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5977cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// getSuccWeight - Return weight of the edge from this block to MBB. This 5987cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// method should NOT be called directly, but by using getEdgeWeight method 5997cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// from MachineBranchProbabilityInfo class. 60025101bb2a799a36be9f077ee2fc2dcf0df2b6efbJakub Staszak uint32_t getSuccWeight(const MachineBasicBlock *succ) const; 6017cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 6027cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 6037cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak // Methods used to maintain doubly linked list of blocks... 604fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman friend struct ilist_traits<MachineBasicBlock>; 6058560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 6068560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke // Machine-CFG mutators 6078560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 6088560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// addPredecessor - Remove pred as a predecessor of this MachineBasicBlock. 6098560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// Don't do this unless you know what you're doing, because it doesn't 6108560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// update pred's successors list. Use pred->addSuccessor instead. 6118560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 6123dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void addPredecessor(MachineBasicBlock *pred); 6138560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 6148560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// removePredecessor - Remove pred as a predecessor of this 6158560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// MachineBasicBlock. Don't do this unless you know what you're 6168560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// doing, because it doesn't update pred's successors list. Use 6178560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// pred->removeSuccessor instead. 6188560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 6193dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removePredecessor(MachineBasicBlock *pred); 620deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve}; 621deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 6221cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbarraw_ostream& operator<<(raw_ostream &OS, const MachineBasicBlock &MBB); 6230aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6242a085c34933a6c76e5a86f2680d93c16b0438801Evan Chengvoid WriteAsOperand(raw_ostream &, const MachineBasicBlock*, bool t); 6252a085c34933a6c76e5a86f2680d93c16b0438801Evan Cheng 62613ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen// This is useful when building IndexedMaps keyed on basic block pointers. 62713ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesenstruct MBB2NumberFunctor : 62813ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen public std::unary_function<const MachineBasicBlock*, unsigned> { 62913ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen unsigned operator()(const MachineBasicBlock *MBB) const { 63013ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen return MBB->getNumber(); 63113ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen } 63213ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen}; 63313ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen 6340aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 6350aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// GraphTraits specializations for machine basic block graphs (machine-CFGs) 6360aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 6370aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6380aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 6390aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... 6400aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 6410aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6420aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<MachineBasicBlock *> { 6430aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 6440aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::succ_iterator ChildIteratorType; 6450aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6460aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(MachineBasicBlock *BB) { return BB; } 647ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6480aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 6490aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 650ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6510aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 6520aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6530aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 6540aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6550aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<const MachineBasicBlock *> { 6560aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 6570aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_succ_iterator ChildIteratorType; 6580aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6590aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(const MachineBasicBlock *BB) { return BB; } 660ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6610aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 6620aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 663ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6640aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 6650aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6660aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 6670aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6680aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 6690aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... and to walk it 6700aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// in inverse order. Inverse order for a function is considered 6710aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// to be when traversing the predecessor edges of a MBB 6720aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// instead of the successor edges. 6730aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 6740aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<MachineBasicBlock*> > { 6750aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 6760aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::pred_iterator ChildIteratorType; 6770aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<MachineBasicBlock *> G) { 6780aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return G.Graph; 6790aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 680ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6810aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 6820aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 683ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6840aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 6850aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6860aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 6870aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6880aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<const MachineBasicBlock*> > { 6890aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 6900aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_pred_iterator ChildIteratorType; 6910aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<const MachineBasicBlock*> G) { 692ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman return G.Graph; 6930aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 694ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6950aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 6960aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 697ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6980aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 6990aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 7000aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 7010aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 702d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke} // End llvm namespace 703deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 704deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve#endif 705