MachineBasicBlock.h revision fbf5f1b72b25de35452d89a4ccd7887f79880be8
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; 807cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 8113d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// LiveIns - Keep track of the physical registers that are livein of 8213d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// the basicblock. 8313d828567812041c1ca1817f4b66fce840903a1fEvan Cheng std::vector<unsigned> LiveIns; 84fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 85fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// Alignment - Alignment of the basic block. Zero if the basic block does 86fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// not need to be aligned. 87fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng unsigned Alignment; 8830b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 8930b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// IsLandingPad - Indicate that this basic block is entered via an 9030b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// exception handler. 9130b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey bool IsLandingPad; 9213d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 938c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// AddressTaken - Indicate that this basic block is potentially the 948c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// target of an indirect branch. 958c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman bool AddressTaken; 968c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 97fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman // Intrusive list support 98fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman MachineBasicBlock() {} 99fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman 1008e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman explicit MachineBasicBlock(MachineFunction &mf, const BasicBlock *bb); 1018e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 1022c3f7ae3843bdc9dcfe85393e178211976c1f9bdDan Gohman ~MachineBasicBlock(); 10317fb34bf8cd10a798c9206eeef3bff151b4d3688Tanya Lattner 1048e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman // MachineBasicBlocks are allocated and owned by MachineFunction. 1058e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman friend class MachineFunction; 106ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 1078e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohmanpublic: 108d0aa0cdbc6fee00f2b2019633a9b9d00d301ac68Chris Lattner /// getBasicBlock - Return the LLVM basic block that this instance 109324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// corresponded to originally. Note that this may be NULL if this instance 110324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// does not correspond directly to an LLVM basic block. 111d0aa0cdbc6fee00f2b2019633a9b9d00d301ac68Chris Lattner /// 1121194e9501984daf0d3237ed1bf18a156173e7fd4Chris Lattner const BasicBlock *getBasicBlock() const { return BB; } 1135e61fa95196b85281eec655787e9c73267532bd1Chris Lattner 114324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// getName - Return the name of the corresponding LLVM basic block, or 115324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// "(null)". 116324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen StringRef getName() const; 117324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen 1188c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// hasAddressTaken - Test whether this block is potentially the target 1198c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// of an indirect branch. 1208c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman bool hasAddressTaken() const { return AddressTaken; } 1218c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 1228c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// setHasAddressTaken - Set this block to reflect that it potentially 1238c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// is the target of an indirect branch. 1248c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman void setHasAddressTaken() { AddressTaken = true; } 1258c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 1265e61fa95196b85281eec655787e9c73267532bd1Chris Lattner /// getParent - Return the MachineFunction containing this basic block. 1275e61fa95196b85281eec655787e9c73267532bd1Chris Lattner /// 128f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner const MachineFunction *getParent() const { return xParent; } 129f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner MachineFunction *getParent() { return xParent; } 1305e61fa95196b85281eec655787e9c73267532bd1Chris Lattner 1318e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman typedef Instructions::iterator iterator; 1328e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman typedef Instructions::const_iterator const_iterator; 133deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 134deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve typedef std::reverse_iterator<iterator> reverse_iterator; 135deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 13634cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned size() const { return (unsigned)Insts.size(); } 137deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve bool empty() const { return Insts.empty(); } 138deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 139c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& front() { return Insts.front(); } 140c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& back() { return Insts.back(); } 1418e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& front() const { return Insts.front(); } 1428e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& back() const { return Insts.back(); } 143deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 144deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator begin() { return Insts.begin(); } 145deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_iterator begin() const { return Insts.begin(); } 146deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator end() { return Insts.end(); } 147deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_iterator end() const { return Insts.end(); } 148deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve reverse_iterator rbegin() { return Insts.rbegin(); } 149deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_reverse_iterator rbegin() const { return Insts.rbegin(); } 150deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve reverse_iterator rend () { return Insts.rend(); } 151deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_reverse_iterator rend () const { return Insts.rend(); } 152deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 15376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG iterators 15476456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator pred_iterator; 15576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_pred_iterator; 15676456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator succ_iterator; 15776456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_succ_iterator; 1586603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 1596603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator; 1606603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 1616603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator; 1626603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 1636603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator; 1646603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 1656603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator; 166ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 167cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_begin() { return Predecessors.begin(); } 168cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_begin() const { return Predecessors.begin(); } 169cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_end() { return Predecessors.end(); } 170cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_end() const { return Predecessors.end(); } 1716603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rbegin() 1726603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 1736603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rbegin() const 1746603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 1756603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rend() 1766603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 1776603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rend() const 1786603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 17934cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned pred_size() const { 18034cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Predecessors.size(); 18134cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 182cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool pred_empty() const { return Predecessors.empty(); } 183cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_begin() { return Successors.begin(); } 184cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_begin() const { return Successors.begin(); } 185cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_end() { return Successors.end(); } 186cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_end() const { return Successors.end(); } 1876603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rbegin() 1886603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 1896603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rbegin() const 1906603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 1916603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rend() 1926603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 1936603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rend() const 1946603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 19534cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned succ_size() const { 19634cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Successors.size(); 19734cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 198cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool succ_empty() const { return Successors.empty(); } 19976456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 20013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // LiveIn management methods. 20113d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 20213d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// addLiveIn - Add the specified register as a live in. Note that it 20313d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// is an error to add the same register to the same set more than once. 20413d828567812041c1ca1817f4b66fce840903a1fEvan Cheng void addLiveIn(unsigned Reg) { LiveIns.push_back(Reg); } 20513d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 206b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// removeLiveIn - Remove the specified register from the live in set. 207b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// 208b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng void removeLiveIn(unsigned Reg); 209b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng 210a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// isLiveIn - Return true if the specified register is in the live in set. 211a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// 212a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng bool isLiveIn(unsigned Reg) const; 213a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng 21413d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // Iteration support for live in sets. These sets are kept in sorted 21513d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // order by their register number. 21681bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman typedef std::vector<unsigned>::const_iterator livein_iterator; 21781bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_begin() const { return LiveIns.begin(); } 21881bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_end() const { return LiveIns.end(); } 21913d828567812041c1ca1817f4b66fce840903a1fEvan Cheng bool livein_empty() const { return LiveIns.empty(); } 22013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 221fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// getAlignment - Return alignment of the basic block. 222fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 223fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng unsigned getAlignment() const { return Alignment; } 224fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 225fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// setAlignment - Set alignment of the basic block. 226fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 227fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng void setAlignment(unsigned Align) { Alignment = Align; } 228fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 22930b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// isLandingPad - Returns true if the block is a landing pad. That is 23030b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 23130b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey bool isLandingPad() const { return IsLandingPad; } 23230b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 23330b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// setIsLandingPad - Indicates the block is a landing pad. That is 23430b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 235fbf5f1b72b25de35452d89a4ccd7887f79880be8Bill Wendling void setIsLandingPad(bool V = true) { IsLandingPad = V; } 23630b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 237cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen /// getLandingPadSuccessor - If this block has a successor that is a landing 238cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen /// pad, return it. Otherwise return NULL. 239cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen const MachineBasicBlock *getLandingPadSuccessor() const; 240cb6404711b7fe6f583480adce8d7e9d5e4b99ae6Jakob Stoklund Olesen 24134ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner // Code Layout methods. 24234ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner 24334ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// moveBefore/moveAfter - move 'this' block before or after the specified 24434ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// block. This only moves the block, it does not modify the CFG or adjust 24534ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// potential fall-throughs at the end of the block. 24634ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveBefore(MachineBasicBlock *NewAfter); 24734ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveAfter(MachineBasicBlock *NewBefore); 2487707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 2497707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// updateTerminator - Update the terminator instructions in block to account 2507707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// for changes to the layout. If the block previously used a fallthrough, 2517707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// it may now need a branch, and if it previously used branching it may now 2527707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// be able to use a fallthrough. 2537707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach void updateTerminator(); 2547707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 25576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG mutators 2567cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 25776456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// addSuccessor - Add succ as a successor of this MachineBasicBlock. 2587cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// The Predecessors list of succ is automatically updated. WEIGHT 2597cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// parameter is stored in Weights list and it may be used by 2607cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// MachineBranchProbabilityInfo analysis to calculate branch probability. 26176456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 2627cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak void addSuccessor(MachineBasicBlock *succ, uint32_t weight = 0); 26376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 264dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove successor from the successors list of this 26576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// MachineBasicBlock. The Predecessors list of succ is automatically updated. 26676456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 2673dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removeSuccessor(MachineBasicBlock *succ); 268dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner 269dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove specified successor from the successors list of 270dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// this MachineBasicBlock. The Predecessors list of succ is automatically 2718a46d342d8cbca7c9c7be6c66007d41329babad0David Greene /// updated. Return the iterator to the element after the one removed. 272dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// 2738a46d342d8cbca7c9c7be6c66007d41329babad0David Greene succ_iterator removeSuccessor(succ_iterator I); 2747cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 2757cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// replaceSuccessor - Replace successor OLD with NEW and update weight info. 2767cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// 2777cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak void replaceSuccessor(MachineBasicBlock *Old, MachineBasicBlock *New); 2787cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 2797cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 28063307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// transferSuccessors - Transfers all the successors from MBB to this 28163307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// machine basic block (i.e., copies all the successors fromMBB and 2821edb8e0910db4cda46a81a4abad80a2a755442aaDan Gohman /// remove all the successors from fromMBB). 28363307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang void transferSuccessors(MachineBasicBlock *fromMBB); 28414152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman 28514152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// transferSuccessorsAndUpdatePHIs - Transfers all the successors, as 28614152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// in transferSuccessors, and update PHI operands in the successor blocks 28714152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman /// which refer to fromMBB to refer to this. 28814152b480d09c7ca912af7c06d00b0ff3912e4f5Dan Gohman void transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB); 28963307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang 290cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// isSuccessor - Return true if the specified MBB is a successor of this 291cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// block. 2926d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isSuccessor(const MachineBasicBlock *MBB) const; 29376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 2946ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// isLayoutSuccessor - Return true if the specified MBB will be emitted 2956ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// immediately after this block, such that if this block exits by 2966ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// falling through, control will transfer to the specified MBB. Note 2976ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// that MBB need not be a successor at all, for example if this block 2986ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// ends with an unconditional branch to some other block. 2996d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isLayoutSuccessor(const MachineBasicBlock *MBB) const; 3006ade6f55a836129af634074e96f660ff23f59a30Dan Gohman 30115acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// canFallThrough - Return true if the block can implicitly transfer 30215acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// control to the block after it by falling off the end of it. This should 30315acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// return false if it can reach the block after it, but it uses an explicit 30415acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// branch to do so (e.g., a table jump). True is a conservative answer. 30515acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson bool canFallThrough(); 30615acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson 307d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// Returns a pointer to the first instructon in this block that is not a 308d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// PHINode instruction. When adding instruction to the beginning of the 309d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// basic block, they should be added before the returned value, not before 310d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// the first instruction, which might be PHI. 311d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman /// Returns end() is there's no non-PHI instruction. 312d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman iterator getFirstNonPHI(); 313d463a7446402f0771465fe66fe0a7d9f72534902Dan Gohman 31492095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// SkipPHIsAndLabels - Return the first instruction in MBB after I that is 31592095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// not a PHI or a label. This is the correct point to insert copies at the 31692095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen /// beginning of a basic block. 31792095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen iterator SkipPHIsAndLabels(iterator I); 31892095e7b3f1eef7b4f2eb0cf037e6b7a01478dabJakob Stoklund Olesen 319743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// getFirstTerminator - returns an iterator to the first terminator 320743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// instruction of this basic block. If a terminator does not exist, 321743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// it returns end() 322743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos iterator getFirstTerminator(); 323743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos 3241a7744501a80351ce31fcecad42c8e35823bc081Jakob Stoklund Olesen const_iterator getFirstTerminator() const { 3251a7744501a80351ce31fcecad42c8e35823bc081Jakob Stoklund Olesen return const_cast<MachineBasicBlock*>(this)->getFirstTerminator(); 3261a7744501a80351ce31fcecad42c8e35823bc081Jakob Stoklund Olesen } 3271a7744501a80351ce31fcecad42c8e35823bc081Jakob Stoklund Olesen 3284f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen /// getLastNonDebugInstr - returns an iterator to the last non-debug 3294f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen /// instruction in the basic block, or end() 3304f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen iterator getLastNonDebugInstr(); 3314f28c1c71450c711e96aa283de53739d8b4504cdJakob Stoklund Olesen 332adb877d62e5ac88db037d91bcd2e9f7dc2c4cd7aJakob Stoklund Olesen const_iterator getLastNonDebugInstr() const { 333adb877d62e5ac88db037d91bcd2e9f7dc2c4cd7aJakob Stoklund Olesen return const_cast<MachineBasicBlock*>(this)->getLastNonDebugInstr(); 334adb877d62e5ac88db037d91bcd2e9f7dc2c4cd7aJakob Stoklund Olesen } 335adb877d62e5ac88db037d91bcd2e9f7dc2c4cd7aJakob Stoklund Olesen 336853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// SplitCriticalEdge - Split the critical edge from this block to the 337853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// given successor block, and return the newly created block, or null 338853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// if splitting is not possible. 339853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// 340853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// This function updates LiveVariables, MachineDominatorTree, and 341853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman /// MachineLoopInfo, as applicable. 342853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman MachineBasicBlock *SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P); 343853d3fb8d24fab2258e9cd5dce3ec8ff4189eedaDan Gohman 3440bbcd6bfd1a90c2aa7386a88ba9fc9aba47d03a7Brian Gaeke void pop_front() { Insts.pop_front(); } 345f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void pop_back() { Insts.pop_back(); } 346deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve void push_back(MachineInstr *MI) { Insts.push_back(MI); } 347deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve template<typename IT> 348deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve void insert(iterator I, IT S, IT E) { Insts.insert(I, S, E); } 349deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator insert(iterator I, MachineInstr *M) { return Insts.insert(I, M); } 350704b07613eb16b7ffb8c8cbc94482bf7425ccd77Devang Patel iterator insertAfter(iterator I, MachineInstr *M) { 351704b07613eb16b7ffb8c8cbc94482bf7425ccd77Devang Patel return Insts.insertAfter(I, M); 352704b07613eb16b7ffb8c8cbc94482bf7425ccd77Devang Patel } 353deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 35446d6a1aeb549a2e4ccd982a1a2cefda541d79c52Vikram S. Adve // erase - Remove the specified element or range from the instruction list. 355c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos // These functions delete any instructions removed. 356deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve // 35746d6a1aeb549a2e4ccd982a1a2cefda541d79c52Vikram S. Adve iterator erase(iterator I) { return Insts.erase(I); } 358deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator erase(iterator I, iterator E) { return Insts.erase(I, E); } 35983706a5a3a6f19451765b743c5a72b62f74eb71aChris Lattner MachineInstr *remove(MachineInstr *I) { return Insts.remove(I); } 360da44b151259525abc9c299f89b9532f3a9883b4eBrian Gaeke void clear() { Insts.clear(); } 361ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 362c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// splice - Take an instruction from MBB 'Other' at the position From, 363c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// and insert it into this MBB right before 'where'. 364c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman void splice(iterator where, MachineBasicBlock *Other, iterator From) { 365c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman Insts.splice(where, Other->Insts, From); 366c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman } 367c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman 368f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// splice - Take a block of instructions from MBB 'Other' in the range [From, 369f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// To), and insert them into this MBB right before 'where'. 370f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void splice(iterator where, MachineBasicBlock *Other, iterator From, 371f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner iterator To) { 372f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner Insts.splice(where, Other->Insts, From, To); 373f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner } 3748e7ae9860bd1f29c95e4e10fe151a22aaafafef9Chris Lattner 3758e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// removeFromParent - This method unlinks 'this' from the containing 3768e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function, and returns it, but does not delete it. 3778e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman MachineBasicBlock *removeFromParent(); 3788e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 3798e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// eraseFromParent - This method unlinks 'this' from the containing 3808e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function and deletes it. 3818e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman void eraseFromParent(); 3828e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 3830370fad74b48388412c52d1325512f2c218487faEvan Cheng /// ReplaceUsesOfBlockWith - Given a machine basic block that branched to 3840370fad74b48388412c52d1325512f2c218487faEvan Cheng /// 'Old', change the code and CFG so that it branches to 'New' instead. 3850370fad74b48388412c52d1325512f2c218487faEvan Cheng void ReplaceUsesOfBlockWith(MachineBasicBlock *Old, MachineBasicBlock *New); 3860370fad74b48388412c52d1325512f2c218487faEvan Cheng 3872bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// CorrectExtraCFGEdges - Various pieces of code can cause excess edges in 3882bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// the CFG to be inserted. If we have proven that MBB can only branch to 3892bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestA and DestB, remove any other MBB successors from the CFG. DestA and 3902bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestB can be null. Besides DestA and DestB, retain other edges leading 3912bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// to LandingPads (currently there can be only one; we don't check or require 3922bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// that here). Note it is possible that DestA and/or DestB are LandingPads. 3932bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool CorrectExtraCFGEdges(MachineBasicBlock *DestA, 3942bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng MachineBasicBlock *DestB, 3952bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool isCond); 3962bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng 39773e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen /// findDebugLoc - find the next valid DebugLoc starting at MBBI, skipping 3983b1906f48d0b541e5be0bc1918c94a454e908bc0Dale Johannesen /// any DBG_VALUE instructions. Return UnknownLoc if there is none. 39973e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen DebugLoc findDebugLoc(MachineBasicBlock::iterator &MBBI); 40073e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen 401f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke // Debugging methods. 402f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke void dump() const; 403f4a1e1a69f0727762a73ef0d551e3bbd16b7c04eJakob Stoklund Olesen void print(raw_ostream &OS, SlotIndexes* = 0) const; 404f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke 405da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// getNumber - MachineBasicBlocks are uniquely numbered at the function 406da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// level, unless they're not in a MachineFunction yet, in which case this 407da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// will return -1. 408da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// 409c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke int getNumber() const { return Number; } 41020a6d8e63056cc2025e7143a5f7226e079e0bc80Chris Lattner void setNumber(int N) { Number = N; } 411c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke 412f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// getSymbol - Return the MCSymbol for this basic block. 413f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// 4141b2eb0e8a6aaf034675b17be6d853cb1c666200fChris Lattner MCSymbol *getSymbol() const; 4157cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 4167cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 4177cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszakprivate: 4187cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// getWeightIterator - Return weight iterator corresponding to the I 4197cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// successor iterator. 4207cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak weight_iterator getWeightIterator(succ_iterator I); 4217cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 4227cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak friend class MachineBranchProbabilityInfo; 4237cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 4247cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// getSuccWeight - Return weight of the edge from this block to MBB. This 4257cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// method should NOT be called directly, but by using getEdgeWeight method 4267cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak /// from MachineBranchProbabilityInfo class. 4277cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak uint32_t getSuccWeight(MachineBasicBlock *succ); 4287cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 4297cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak 4307cc2b07437a1243c33324549a1904fefc5f1845eJakub Staszak // Methods used to maintain doubly linked list of blocks... 431fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman friend struct ilist_traits<MachineBasicBlock>; 4328560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 4338560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke // Machine-CFG mutators 4348560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 4358560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// addPredecessor - Remove pred as a predecessor of this MachineBasicBlock. 4368560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// Don't do this unless you know what you're doing, because it doesn't 4378560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// update pred's successors list. Use pred->addSuccessor instead. 4388560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 4393dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void addPredecessor(MachineBasicBlock *pred); 4408560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 4418560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// removePredecessor - Remove pred as a predecessor of this 4428560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// MachineBasicBlock. Don't do this unless you know what you're 4438560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// doing, because it doesn't update pred's successors list. Use 4448560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// pred->removeSuccessor instead. 4458560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 4463dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removePredecessor(MachineBasicBlock *pred); 447deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve}; 448deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 4491cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbarraw_ostream& operator<<(raw_ostream &OS, const MachineBasicBlock &MBB); 4500aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4512a085c34933a6c76e5a86f2680d93c16b0438801Evan Chengvoid WriteAsOperand(raw_ostream &, const MachineBasicBlock*, bool t); 4522a085c34933a6c76e5a86f2680d93c16b0438801Evan Cheng 45313ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen// This is useful when building IndexedMaps keyed on basic block pointers. 45413ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesenstruct MBB2NumberFunctor : 45513ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen public std::unary_function<const MachineBasicBlock*, unsigned> { 45613ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen unsigned operator()(const MachineBasicBlock *MBB) const { 45713ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen return MBB->getNumber(); 45813ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen } 45913ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen}; 46013ba2dab631636e525a44bb259aaea56a860d1c7Jakob Stoklund Olesen 4610aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 4620aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// GraphTraits specializations for machine basic block graphs (machine-CFGs) 4630aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 4640aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4650aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 4660aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... 4670aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 4680aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4690aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<MachineBasicBlock *> { 4700aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 4710aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::succ_iterator ChildIteratorType; 4720aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4730aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(MachineBasicBlock *BB) { return BB; } 474ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 4750aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 4760aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 477ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 4780aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 4790aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 4800aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 4810aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4820aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<const MachineBasicBlock *> { 4830aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 4840aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_succ_iterator ChildIteratorType; 4850aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4860aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(const MachineBasicBlock *BB) { return BB; } 487ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 4880aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 4890aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 490ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 4910aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 4920aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 4930aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 4940aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4950aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 4960aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... and to walk it 4970aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// in inverse order. Inverse order for a function is considered 4980aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// to be when traversing the predecessor edges of a MBB 4990aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// instead of the successor edges. 5000aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 5010aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<MachineBasicBlock*> > { 5020aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 5030aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::pred_iterator ChildIteratorType; 5040aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<MachineBasicBlock *> G) { 5050aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return G.Graph; 5060aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 507ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 5080aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 5090aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 510ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 5110aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 5120aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 5130aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 5140aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 5150aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<const MachineBasicBlock*> > { 5160aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 5170aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_pred_iterator ChildIteratorType; 5180aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<const MachineBasicBlock*> G) { 519ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman return G.Graph; 5200aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 521ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 5220aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 5230aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 524ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 5250aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 5260aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 5270aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 5280aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 529d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke} // End llvm namespace 530deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 531deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve#endif 532