MachineBasicBlock.h revision c4f70d437df505e128e0debdf0c5f4ab5010e1b5
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: 14620aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen bundle_iterator(IterTy mii) : MII(mii) {} 1477c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1487c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator(Ty &mi) : MII(mi) { 1497c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng assert(!mi.isInsideBundle() && 1507c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng "It's not legal to initialize bundle_iterator with a bundled MI"); 1517c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1527c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator(Ty *mi) : MII(mi) { 1537c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng assert((!mi || !mi->isInsideBundle()) && 1547c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng "It's not legal to initialize bundle_iterator with a bundled MI"); 1557c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 156d4786e221c679fced994993d9ee7228572d4b148Andrew Trick // Template allows conversion from const to nonconst. 157d4786e221c679fced994993d9ee7228572d4b148Andrew Trick template<class OtherTy, class OtherIterTy> 158d4786e221c679fced994993d9ee7228572d4b148Andrew Trick bundle_iterator(const bundle_iterator<OtherTy, OtherIterTy> &I) 159d4786e221c679fced994993d9ee7228572d4b148Andrew Trick : MII(I.getInstrIterator()) {} 1607c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator() : MII(0) {} 1617c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1627c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Ty &operator*() const { return *MII; } 1637c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Ty *operator->() const { return &operator*(); } 1647c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1657c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng operator Ty*() const { return MII; } 1667c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 1677c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bool operator==(const bundle_iterator &x) const { 1687c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return MII == x.MII; 1697c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1707c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bool operator!=(const bundle_iterator &x) const { 1717c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return !operator==(x); 1727c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 17357cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 1747c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng // Increment and decrement operators... 1757c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator &operator--() { // predecrement - Back up 17620aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen do --MII; 17720aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen while (MII->isInsideBundle()); 1787c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return *this; 1797c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1807c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator &operator++() { // preincrement - Advance 18120aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen IterTy E = MII->getParent()->instr_end(); 18220aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen do ++MII; 18320aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen while (MII != E && MII->isInsideBundle()); 1847c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return *this; 1857c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1867c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator operator--(int) { // postdecrement operators... 1877c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator tmp = *this; 18820aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen --*this; 1897c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return tmp; 1907c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1917c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator operator++(int) { // postincrement operators... 1927c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng bundle_iterator tmp = *this; 19320aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen ++*this; 1947c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return tmp; 1957c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 1967c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 197ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng IterTy getInstrIterator() const { 1987c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return MII; 19957cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach } 2007c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng }; 2017c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 202ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng typedef Instructions::iterator instr_iterator; 203ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng typedef Instructions::const_iterator const_instr_iterator; 204ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng typedef std::reverse_iterator<instr_iterator> reverse_instr_iterator; 2057c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef 206ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng std::reverse_iterator<const_instr_iterator> const_reverse_instr_iterator; 2077c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 2087c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef 209ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng bundle_iterator<MachineInstr,instr_iterator> iterator; 2107c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef 211ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng bundle_iterator<const MachineInstr,const_instr_iterator> const_iterator; 2127c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 2137c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng typedef std::reverse_iterator<iterator> reverse_iterator; 2147c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 215deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 21634cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned size() const { return (unsigned)Insts.size(); } 217deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve bool empty() const { return Insts.empty(); } 218deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 219c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& front() { return Insts.front(); } 220c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& back() { return Insts.back(); } 2218e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& front() const { return Insts.front(); } 2228e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& back() const { return Insts.back(); } 223deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 224ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator instr_begin() { return Insts.begin(); } 225ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_instr_iterator instr_begin() const { return Insts.begin(); } 226ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator instr_end() { return Insts.end(); } 227ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_instr_iterator instr_end() const { return Insts.end(); } 228ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng reverse_instr_iterator instr_rbegin() { return Insts.rbegin(); } 229ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_reverse_instr_iterator instr_rbegin() const { return Insts.rbegin(); } 230ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng reverse_instr_iterator instr_rend () { return Insts.rend(); } 231ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng const_reverse_instr_iterator instr_rend () const { return Insts.rend(); } 2327c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 23320aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen iterator begin() { return instr_begin(); } 23420aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen const_iterator begin() const { return instr_begin(); } 23520aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen iterator end () { return instr_end(); } 23620aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen const_iterator end () const { return instr_end(); } 23720aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen reverse_iterator rbegin() { return instr_rbegin(); } 23820aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen const_reverse_iterator rbegin() const { return instr_rbegin(); } 23920aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen reverse_iterator rend () { return instr_rend(); } 24020aedcdfa35f4b6494d4990cf6dd4459d7172c49Jakob Stoklund Olesen const_reverse_iterator rend () const { return instr_rend(); } 241deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 2427c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 24376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG iterators 24476456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator pred_iterator; 24576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_pred_iterator; 24676456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator succ_iterator; 24776456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_succ_iterator; 2486603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 2496603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator; 2506603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 2516603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator; 2526603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 2536603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator; 2546603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 2556603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator; 256ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 257cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_begin() { return Predecessors.begin(); } 258cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_begin() const { return Predecessors.begin(); } 259cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_end() { return Predecessors.end(); } 260cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_end() const { return Predecessors.end(); } 2616603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rbegin() 2626603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 2636603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rbegin() const 2646603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 2656603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rend() 2666603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 2676603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rend() const 2686603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 26934cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned pred_size() const { 27034cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Predecessors.size(); 27134cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 272cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool pred_empty() const { return Predecessors.empty(); } 273cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_begin() { return Successors.begin(); } 274cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_begin() const { return Successors.begin(); } 275cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_end() { return Successors.end(); } 276cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_end() const { return Successors.end(); } 2776603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rbegin() 2786603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 2796603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rbegin() const 2806603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 2816603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rend() 2826603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 2836603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rend() const 2846603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 28534cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned succ_size() const { 28634cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Successors.size(); 28734cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 288cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool succ_empty() const { return Successors.empty(); } 28976456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 29013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // LiveIn management methods. 29113d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 29213d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// addLiveIn - Add the specified register as a live in. Note that it 29313d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// is an error to add the same register to the same set more than once. 29413d828567812041c1ca1817f4b66fce840903a1fEvan Cheng void addLiveIn(unsigned Reg) { LiveIns.push_back(Reg); } 29513d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 296b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// removeLiveIn - Remove the specified register from the live in set. 297b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// 298b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng void removeLiveIn(unsigned Reg); 299b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng 300a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// isLiveIn - Return true if the specified register is in the live in set. 301a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// 302a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng bool isLiveIn(unsigned Reg) const; 303a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng 30413d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // Iteration support for live in sets. These sets are kept in sorted 30513d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // order by their register number. 30681bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman typedef std::vector<unsigned>::const_iterator livein_iterator; 30781bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_begin() const { return LiveIns.begin(); } 30881bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_end() const { return LiveIns.end(); } 30913d828567812041c1ca1817f4b66fce840903a1fEvan Cheng bool livein_empty() const { return LiveIns.empty(); } 31013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 311fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// getAlignment - Return alignment of the basic block. 3128c741b8064f1116d8d8dc435b60b75abdf5c4d57Jakob Stoklund Olesen /// The alignment is specified as log2(bytes). 313fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 314fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng unsigned getAlignment() const { return Alignment; } 315fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 316fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// setAlignment - Set alignment of the basic block. 3178c741b8064f1116d8d8dc435b60b75abdf5c4d57Jakob Stoklund Olesen /// The alignment is specified as log2(bytes). 318fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 319fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng void setAlignment(unsigned Align) { Alignment = Align; } 320fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 32130b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// isLandingPad - Returns true if the block is a landing pad. That is 32230b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 32330b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey bool isLandingPad() const { return IsLandingPad; } 32430b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 32530b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// setIsLandingPad - Indicates the block is a landing pad. That is 32630b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 327fbf5f1b72b25de35452d89a4ccd7887f79880be8Bill Wendling void setIsLandingPad(bool V = true) { IsLandingPad = V; } 32830b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 329cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen /// getLandingPadSuccessor - If this block has a successor that is a landing 330cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen /// pad, return it. Otherwise return NULL. 331cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen const MachineBasicBlock *getLandingPadSuccessor() const; 332cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen 33334ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner // Code Layout methods. 33457cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 33534ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// moveBefore/moveAfter - move 'this' block before or after the specified 33634ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// block. This only moves the block, it does not modify the CFG or adjust 33734ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// potential fall-throughs at the end of the block. 33834ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveBefore(MachineBasicBlock *NewAfter); 33934ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveAfter(MachineBasicBlock *NewBefore); 3407707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 3417707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// updateTerminator - Update the terminator instructions in block to account 3427707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// for changes to the layout. If the block previously used a fallthrough, 3437707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// it may now need a branch, and if it previously used branching it may now 3447707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// be able to use a fallthrough. 3457707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach void updateTerminator(); 3467707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 34776456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG mutators 3487cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 34976456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// addSuccessor - Add succ as a successor of this MachineBasicBlock. 3507cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// The Predecessors list of succ is automatically updated. WEIGHT 3517cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// parameter is stored in Weights list and it may be used by 3527cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// MachineBranchProbabilityInfo analysis to calculate branch probability. 35376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 3542c5a960b0eae0634da6e1854111b35f475e65335Jakob Stoklund Olesen /// Note that duplicate Machine CFG edges are not allowed. 3552c5a960b0eae0634da6e1854111b35f475e65335Jakob Stoklund Olesen /// 3567cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak void addSuccessor(MachineBasicBlock *succ, uint32_t weight = 0); 35776456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 358dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove successor from the successors list of this 35976456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// MachineBasicBlock. The Predecessors list of succ is automatically updated. 36076456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 3613dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removeSuccessor(MachineBasicBlock *succ); 362dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner 363dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove specified successor from the successors list of 364dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// this MachineBasicBlock. The Predecessors list of succ is automatically 3658a46d342d8cbca7c9c7be6c66007d41329babad0David Greene /// updated. Return the iterator to the element after the one removed. 366dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// 3678a46d342d8cbca7c9c7be6c66007d41329babad0David Greene succ_iterator removeSuccessor(succ_iterator I); 3687cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 3697cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// replaceSuccessor - Replace successor OLD with NEW and update weight info. 3707cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// 3717cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak void replaceSuccessor(MachineBasicBlock *Old, MachineBasicBlock *New); 3727cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 3737cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 37463307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// transferSuccessors - Transfers all the successors from MBB to this 37563307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// machine basic block (i.e., copies all the successors fromMBB and 3761edb8e0910db4cda46a81a4abad80a2a755442aaDan Gohman /// remove all the successors from fromMBB). 37763307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang void transferSuccessors(MachineBasicBlock *fromMBB); 37814152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman 37914152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// transferSuccessorsAndUpdatePHIs - Transfers all the successors, as 38014152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// in transferSuccessors, and update PHI operands in the successor blocks 38114152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// which refer to fromMBB to refer to this. 38214152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman void transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB); 38357cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 384f192b507a33b2ab2e2f6271bb1ea6ed4fbda69e7Jakob Stoklund Olesen /// isPredecessor - Return true if the specified MBB is a predecessor of this 385f192b507a33b2ab2e2f6271bb1ea6ed4fbda69e7Jakob Stoklund Olesen /// block. 386f192b507a33b2ab2e2f6271bb1ea6ed4fbda69e7Jakob Stoklund Olesen bool isPredecessor(const MachineBasicBlock *MBB) const; 387f192b507a33b2ab2e2f6271bb1ea6ed4fbda69e7Jakob Stoklund Olesen 388cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// isSuccessor - Return true if the specified MBB is a successor of this 389cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// block. 3906d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isSuccessor(const MachineBasicBlock *MBB) const; 39176456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 3926ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// isLayoutSuccessor - Return true if the specified MBB will be emitted 3936ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// immediately after this block, such that if this block exits by 3946ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// falling through, control will transfer to the specified MBB. Note 3956ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// that MBB need not be a successor at all, for example if this block 3966ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// ends with an unconditional branch to some other block. 3976d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isLayoutSuccessor(const MachineBasicBlock *MBB) const; 3986ade6f55a836129af634074e96f660ff23f59a30Dan Gohman 39915acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// canFallThrough - Return true if the block can implicitly transfer 40015acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// control to the block after it by falling off the end of it. This should 40115acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// return false if it can reach the block after it, but it uses an explicit 40215acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// branch to do so (e.g., a table jump). True is a conservative answer. 40315acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson bool canFallThrough(); 40415acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson 40557cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach /// Returns a pointer to the first instructon in this block that is not a 406d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// PHINode instruction. When adding instruction to the beginning of the 407d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// basic block, they should be added before the returned value, not before 408d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// the first instruction, which might be PHI. 409d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// Returns end() is there's no non-PHI instruction. 410d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman iterator getFirstNonPHI(); 411d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman 41292095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// SkipPHIsAndLabels - Return the first instruction in MBB after I that is 41392095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// not a PHI or a label. This is the correct point to insert copies at the 41492095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// beginning of a basic block. 41592095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen iterator SkipPHIsAndLabels(iterator I); 41692095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen 417743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// getFirstTerminator - returns an iterator to the first terminator 418743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// instruction of this basic block. If a terminator does not exist, 419743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// it returns end() 420743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos iterator getFirstTerminator(); 4217c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_iterator getFirstTerminator() const; 422743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos 423ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// getFirstInstrTerminator - Same getFirstTerminator but it ignores bundles 424ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// and return an instr_iterator instead. 425ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator getFirstInstrTerminator(); 4261a7744501a80351ce31fcecad42c8e35823bc081Jakob Stoklund Olesen 4274f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen /// getLastNonDebugInstr - returns an iterator to the last non-debug 4284f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen /// instruction in the basic block, or end() 4294f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen iterator getLastNonDebugInstr(); 4307c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng const_iterator getLastNonDebugInstr() const; 431adb877d62e5ac88db037d91bcd2e9f7dc2c4cd7aJakob Stoklund Olesen 432853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// SplitCriticalEdge - Split the critical edge from this block to the 433853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// given successor block, and return the newly created block, or null 434853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// if splitting is not possible. 435853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// 436853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// This function updates LiveVariables, MachineDominatorTree, and 437853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// MachineLoopInfo, as applicable. 438853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman MachineBasicBlock *SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P); 439853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman 4400bbcd6bfd1a90c2aa7386a88ba9fc9aba47d03a7Brian Gaeke void pop_front() { Insts.pop_front(); } 441f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void pop_back() { Insts.pop_back(); } 442deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve void push_back(MachineInstr *MI) { Insts.push_back(MI); } 4437c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 444deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve template<typename IT> 445ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void insert(instr_iterator I, IT S, IT E) { 4467c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Insts.insert(I, S, E); 4477c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 448ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator insert(instr_iterator I, MachineInstr *M) { 4497c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return Insts.insert(I, M); 4507c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 45157cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach instr_iterator insertAfter(instr_iterator I, MachineInstr *M) { 45257cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach return Insts.insertAfter(I, M); 453704b07613eb16b7ffb8c8cbc94482bf7425ccd77Devang Patel } 454deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 4557c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng template<typename IT> 4567c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng void insert(iterator I, IT S, IT E) { 457ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng Insts.insert(I.getInstrIterator(), S, E); 4587c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 4597c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng iterator insert(iterator I, MachineInstr *M) { 460ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return Insts.insert(I.getInstrIterator(), M); 4617c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 46257cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach iterator insertAfter(iterator I, MachineInstr *M) { 46357cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach return Insts.insertAfter(I.getInstrIterator(), M); 4647c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 4657c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 466ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// erase - Remove the specified element or range from the instruction list. 467ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// These functions delete any instructions removed. 468ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// 469ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator erase(instr_iterator I) { 4707c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return Insts.erase(I); 4717c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 472ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator erase(instr_iterator I, instr_iterator E) { 4737c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng return Insts.erase(I, E); 4747c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 475ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator erase_instr(MachineInstr *I) { 476ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator MII(I); 477ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return erase(MII); 4787c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 479ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng 480ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng iterator erase(iterator I); 4817c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng iterator erase(iterator I, iterator E) { 482ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return Insts.erase(I.getInstrIterator(), E.getInstrIterator()); 483ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng } 484ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng iterator erase(MachineInstr *I) { 485ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng iterator MII(I); 486ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return erase(MII); 4877c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 4887c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng 489ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// remove - Remove the instruction from the instruction list. This function 490ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// does not delete the instruction. WARNING: Note, if the specified 491ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// instruction is a bundle this function will remove all the bundled 492ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// instructions as well. It is up to the caller to keep a list of the 493ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// bundled instructions and re-insert them if desired. This function is 494b5e8b8c8f762ae9a95f52a477440e426622d5446Chris Lattner /// *not recommended* for manipulating instructions with bundles. Use 495ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng /// splice instead. 496ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng MachineInstr *remove(MachineInstr *I); 497ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void clear() { 498ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng Insts.clear(); 499ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng } 500ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 501c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// splice - Take an instruction from MBB 'Other' at the position From, 502c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// and insert it into this MBB right before 'where'. 503ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void splice(instr_iterator where, MachineBasicBlock *Other, 504ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator From) { 505c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman Insts.splice(where, Other->Insts, From); 506c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman } 507ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void splice(iterator where, MachineBasicBlock *Other, iterator From); 508c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman 509f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// splice - Take a block of instructions from MBB 'Other' in the range [From, 510f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// To), and insert them into this MBB right before 'where'. 511ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng void splice(instr_iterator where, MachineBasicBlock *Other, instr_iterator From, 512ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng instr_iterator To) { 5137c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng Insts.splice(where, Other->Insts, From, To); 5147c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 515f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void splice(iterator where, MachineBasicBlock *Other, iterator From, 516f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner iterator To) { 517ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng Insts.splice(where.getInstrIterator(), Other->Insts, 518ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng From.getInstrIterator(), To.getInstrIterator()); 519f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner } 5208e7ae9860bd1f29c95e4e10fe151a22aaafafef9Chris Lattner 5218e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// removeFromParent - This method unlinks 'this' from the containing 5228e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function, and returns it, but does not delete it. 5238e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman MachineBasicBlock *removeFromParent(); 52457cae881e2b6c85a562d3fd2a7f10bf9d7921b40Jim Grosbach 5258e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// eraseFromParent - This method unlinks 'this' from the containing 5268e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function and deletes it. 5278e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman void eraseFromParent(); 5288e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 5290370fad74b48388412c52d1325512f2c218487faEvan Cheng /// ReplaceUsesOfBlockWith - Given a machine basic block that branched to 5300370fad74b48388412c52d1325512f2c218487faEvan Cheng /// 'Old', change the code and CFG so that it branches to 'New' instead. 5310370fad74b48388412c52d1325512f2c218487faEvan Cheng void ReplaceUsesOfBlockWith(MachineBasicBlock *Old, MachineBasicBlock *New); 5320370fad74b48388412c52d1325512f2c218487faEvan Cheng 5332bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// CorrectExtraCFGEdges - Various pieces of code can cause excess edges in 5342bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// the CFG to be inserted. If we have proven that MBB can only branch to 5352bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestA and DestB, remove any other MBB successors from the CFG. DestA and 5362bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestB can be null. Besides DestA and DestB, retain other edges leading 5372bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// to LandingPads (currently there can be only one; we don't check or require 5382bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// that here). Note it is possible that DestA and/or DestB are LandingPads. 5392bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool CorrectExtraCFGEdges(MachineBasicBlock *DestA, 5402bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng MachineBasicBlock *DestB, 5412bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool isCond); 5422bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng 54373e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen /// findDebugLoc - find the next valid DebugLoc starting at MBBI, skipping 5443b1906f48d0b541e5be0bc1918c94a454e908bc0Dale Johannesen /// any DBG_VALUE instructions. Return UnknownLoc if there is none. 545ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng DebugLoc findDebugLoc(instr_iterator MBBI); 5467c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng DebugLoc findDebugLoc(iterator MBBI) { 547ddfd1377d2e4154d44dc3ad217735adc15af2e3fEvan Cheng return findDebugLoc(MBBI.getInstrIterator()); 5487c2a4a30e0e16762c75adacebd05ec9fcbccf16bEvan Cheng } 54973e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen 550c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy /// Possible outcome of a register liveness query to computeRegisterLiveness() 551c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy enum LivenessQueryResult { 552c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy LQR_Live, ///< Register is known to be live. 553c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy LQR_OverlappingLive, ///< Register itself is not live, but some overlapping 554c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy ///< register is. 555c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy LQR_Dead, ///< Register is known to be dead. 556c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy LQR_Unknown ///< Register liveness not decidable from local 557c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy ///< neighborhood. 558c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy }; 559c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy 560c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy /// computeRegisterLiveness - Return whether (physical) register \c Reg 561c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy /// has been <def>ined and not <kill>ed as of just before \c MI. 562c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy /// 563c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy /// Search is localised to a neighborhood of 564c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy /// \c Neighborhood instructions before (searching for defs or kills) and 565c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy /// Neighborhood instructions after (searching just for defs) MI. 566c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy /// 567c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy /// \c Reg must be a physical register. 568c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy LivenessQueryResult computeRegisterLiveness(const TargetRegisterInfo *TRI, 569c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy unsigned Reg, MachineInstr *MI, 570c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy unsigned Neighborhood=10); 571c4f70d437df505e128e0debdf0c5f4ab5010e1b5James Molloy 572f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke // Debugging methods. 573f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke void dump() const; 574f4a1e1a69f0727762a73ef0d551e3bbd16b7c04eJakob Stoklund Olesen void print(raw_ostream &OS, SlotIndexes* = 0) const; 575f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke 576da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// getNumber - MachineBasicBlocks are uniquely numbered at the function 577da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// level, unless they're not in a MachineFunction yet, in which case this 578da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// will return -1. 579da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// 580c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke int getNumber() const { return Number; } 58120a6d8e63056cc2025e7143a5f7226e079e0bc80Chris Lattner void setNumber(int N) { Number = N; } 582c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke 583f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// getSymbol - Return the MCSymbol for this basic block. 584f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// 5851b2eb0e8a6aaf034675b17be6d853cb1c666200fChris Lattner MCSymbol *getSymbol() const; 5867cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5877cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5887cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszakprivate: 5897cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// getWeightIterator - Return weight iterator corresponding to the I 5907cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// successor iterator. 5917cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak weight_iterator getWeightIterator(succ_iterator I); 59225101bb2a799a36be9f077ee2fc2dcf0df2b6efbJakub Staszak const_weight_iterator getWeightIterator(const_succ_iterator I) const; 5937cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5947cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak friend class MachineBranchProbabilityInfo; 5957cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 5967cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// getSuccWeight - Return weight of the edge from this block to MBB. This 5977cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// method should NOT be called directly, but by using getEdgeWeight method 5987cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// from MachineBranchProbabilityInfo class. 599990ca5517fd6666d4049b6b8281d9df99da11637Jakob Stoklund Olesen uint32_t getSuccWeight(const_succ_iterator Succ) const; 6007cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 6017cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 6027cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak // Methods used to maintain doubly linked list of blocks... 603fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman friend struct ilist_traits<MachineBasicBlock>; 6048560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 6058560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke // Machine-CFG mutators 6068560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 6078560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// addPredecessor - Remove pred as a predecessor of this MachineBasicBlock. 6088560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// Don't do this unless you know what you're doing, because it doesn't 6098560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// update pred's successors list. Use pred->addSuccessor instead. 6108560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 6113dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void addPredecessor(MachineBasicBlock *pred); 6128560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 6138560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// removePredecessor - Remove pred as a predecessor of this 6148560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// MachineBasicBlock. Don't do this unless you know what you're 6158560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// doing, because it doesn't update pred's successors list. Use 6168560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// pred->removeSuccessor instead. 6178560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 6183dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removePredecessor(MachineBasicBlock *pred); 619deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve}; 620deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 6211cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbarraw_ostream& operator<<(raw_ostream &OS, const MachineBasicBlock &MBB); 6220aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6232a085c34933a6c76e5a86f2680d93c16b0438801Evan Chengvoid WriteAsOperand(raw_ostream &, const MachineBasicBlock*, bool t); 6242a085c34933a6c76e5a86f2680d93c16b0438801Evan Cheng 62513ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen// This is useful when building IndexedMaps keyed on basic block pointers. 62613ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesenstruct MBB2NumberFunctor : 62713ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen public std::unary_function<const MachineBasicBlock*, unsigned> { 62813ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen unsigned operator()(const MachineBasicBlock *MBB) const { 62913ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen return MBB->getNumber(); 63013ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen } 63113ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen}; 63213ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen 6330aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 6340aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// GraphTraits specializations for machine basic block graphs (machine-CFGs) 6350aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 6360aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6370aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 6380aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... 6390aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 6400aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6410aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<MachineBasicBlock *> { 6420aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 6430aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::succ_iterator ChildIteratorType; 6440aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6450aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(MachineBasicBlock *BB) { return BB; } 646ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6470aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 6480aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 649ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6500aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 6510aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6520aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 6530aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6540aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<const MachineBasicBlock *> { 6550aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 6560aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_succ_iterator ChildIteratorType; 6570aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6580aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(const MachineBasicBlock *BB) { return BB; } 659ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6600aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 6610aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 662ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6630aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 6640aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6650aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 6660aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6670aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 6680aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... and to walk it 6690aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// in inverse order. Inverse order for a function is considered 6700aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// to be when traversing the predecessor edges of a MBB 6710aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// instead of the successor edges. 6720aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 6730aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<MachineBasicBlock*> > { 6740aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 6750aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::pred_iterator ChildIteratorType; 6760aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<MachineBasicBlock *> G) { 6770aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return G.Graph; 6780aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 679ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6800aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 6810aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 682ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6830aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 6840aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6850aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 6860aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 6870aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<const MachineBasicBlock*> > { 6880aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 6890aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_pred_iterator ChildIteratorType; 6900aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<const MachineBasicBlock*> G) { 691ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman return G.Graph; 6920aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 693ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 6940aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 6950aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 696ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 6970aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 6980aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 6990aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 7000aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 701d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke} // End llvm namespace 702deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 703deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve#endif 704