MachineBasicBlock.h revision 81bf03eb5cd68243eabb52505105aa5f4a831bf3
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" 19d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 20d0fde30ce850b78371fd1386338350591f9ff494Brian Gaekenamespace llvm { 21fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman 22fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanclass BasicBlock; 23fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanclass MachineFunction; 24a655f088b88cf015fc48721fd9869787d1b8ce13Chris Lattnerclass MCSymbol; 25a655f088b88cf015fc48721fd9869787d1b8ce13Chris Lattnerclass StringRef; 261cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbarclass raw_ostream; 27d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 2894dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenostemplate <> 298e4018e2de52c534405d7155c7009d0b35afb861Cedric Venetstruct ilist_traits<MachineInstr> : public ilist_default_traits<MachineInstr> { 308e4018e2de52c534405d7155c7009d0b35afb861Cedric Venetprivate: 317309be6735666143bd9835b275dc8501617a2591Gabor Greif mutable ilist_half_node<MachineInstr> Sentinel; 32fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman 338e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman // this is only set by the MachineBasicBlock owning the LiveList 3494dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos friend class MachineBasicBlock; 358e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman MachineBasicBlock* Parent; 3694dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos 378e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohmanpublic: 38c7f6b8c5d40e17bf43fd3a1549d7d89c9da735e1Gabor Greif MachineInstr *createSentinel() const { 39c7f6b8c5d40e17bf43fd3a1549d7d89c9da735e1Gabor Greif return static_cast<MachineInstr*>(&Sentinel); 40c7f6b8c5d40e17bf43fd3a1549d7d89c9da735e1Gabor Greif } 41fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman void destroySentinel(MachineInstr *) const {} 4294dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos 43c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif MachineInstr *provideInitialHead() const { return createSentinel(); } 44c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif MachineInstr *ensureHead(MachineInstr*) const { return createSentinel(); } 45f3841fcbd587c31aa9842b3f33bd57de40c9f443Gabor Greif static void noteHead(MachineInstr*, MachineInstr*) {} 46c23b8719ef9d6b1220e854b37d40e9e1c48a82bcGabor Greif 47aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos void addNodeToList(MachineInstr* N); 48aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos void removeNodeFromList(MachineInstr* N); 49fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman void transferNodesFromList(ilist_traits &SrcTraits, 50fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman ilist_iterator<MachineInstr> first, 51fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman ilist_iterator<MachineInstr> last); 528e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman void deleteNode(MachineInstr *N); 53fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanprivate: 54fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman void createNode(const MachineInstr &); 5594dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos}; 5694dc07728f091c652f0a8059aba6dce5018485eeAlkis Evlogimenos 57fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanclass MachineBasicBlock : public ilist_node<MachineBasicBlock> { 58fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman typedef ilist<MachineInstr> Instructions; 59c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos Instructions Insts; 601194e9501984daf0d3237ed1bf18a156173e7fd4Chris Lattner const BasicBlock *BB; 61c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke int Number; 62f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner MachineFunction *xParent; 63f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner 6413d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// Predecessors/Successors - Keep track of the predecessor / successor 6513d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// basicblocks. 6613d828567812041c1ca1817f4b66fce840903a1fEvan Cheng std::vector<MachineBasicBlock *> Predecessors; 6713d828567812041c1ca1817f4b66fce840903a1fEvan Cheng std::vector<MachineBasicBlock *> Successors; 6813d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 6913d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// LiveIns - Keep track of the physical registers that are livein of 7013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// the basicblock. 7113d828567812041c1ca1817f4b66fce840903a1fEvan Cheng std::vector<unsigned> LiveIns; 72fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 73fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// Alignment - Alignment of the basic block. Zero if the basic block does 74fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// not need to be aligned. 75fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng unsigned Alignment; 7630b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 7730b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// IsLandingPad - Indicate that this basic block is entered via an 7830b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// exception handler. 7930b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey bool IsLandingPad; 8013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 818c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// AddressTaken - Indicate that this basic block is potentially the 828c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// target of an indirect branch. 838c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman bool AddressTaken; 848c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 85fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman // Intrusive list support 86fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman MachineBasicBlock() {} 87fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman 888e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman explicit MachineBasicBlock(MachineFunction &mf, const BasicBlock *bb); 898e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 902c3f7ae3843bdc9dcfe85393e178211976c1f9bdDan Gohman ~MachineBasicBlock(); 9117fb34bf8cd10a798c9206eeef3bff151b4d3688Tanya Lattner 928e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman // MachineBasicBlocks are allocated and owned by MachineFunction. 938e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman friend class MachineFunction; 94ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 958e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohmanpublic: 96d0aa0cdbc6fee00f2b2019633a9b9d00d301ac68Chris Lattner /// getBasicBlock - Return the LLVM basic block that this instance 97324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// corresponded to originally. Note that this may be NULL if this instance 98324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// does not correspond directly to an LLVM basic block. 99d0aa0cdbc6fee00f2b2019633a9b9d00d301ac68Chris Lattner /// 1001194e9501984daf0d3237ed1bf18a156173e7fd4Chris Lattner const BasicBlock *getBasicBlock() const { return BB; } 1015e61fa95196b85281eec655787e9c73267532bd1Chris Lattner 102324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// getName - Return the name of the corresponding LLVM basic block, or 103324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen /// "(null)". 104324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen StringRef getName() const; 105324da7647cfc3025e0c987176f0a300f9f780e6fJakob Stoklund Olesen 1068c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// hasAddressTaken - Test whether this block is potentially the target 1078c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// of an indirect branch. 1088c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman bool hasAddressTaken() const { return AddressTaken; } 1098c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 1108c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// setHasAddressTaken - Set this block to reflect that it potentially 1118c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman /// is the target of an indirect branch. 1128c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman void setHasAddressTaken() { AddressTaken = true; } 1138c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman 1145e61fa95196b85281eec655787e9c73267532bd1Chris Lattner /// getParent - Return the MachineFunction containing this basic block. 1155e61fa95196b85281eec655787e9c73267532bd1Chris Lattner /// 116f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner const MachineFunction *getParent() const { return xParent; } 117f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner MachineFunction *getParent() { return xParent; } 1185e61fa95196b85281eec655787e9c73267532bd1Chris Lattner 1198e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman typedef Instructions::iterator iterator; 1208e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman typedef Instructions::const_iterator const_iterator; 121deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 122deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve typedef std::reverse_iterator<iterator> reverse_iterator; 123deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 12434cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned size() const { return (unsigned)Insts.size(); } 125deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve bool empty() const { return Insts.empty(); } 126deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 127c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& front() { return Insts.front(); } 128c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos MachineInstr& back() { return Insts.back(); } 1298e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& front() const { return Insts.front(); } 1308e8b8a223c2b0e69f44c0639f846260c8011668fDan Gohman const MachineInstr& back() const { return Insts.back(); } 131deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 132deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator begin() { return Insts.begin(); } 133deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_iterator begin() const { return Insts.begin(); } 134deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator end() { return Insts.end(); } 135deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_iterator end() const { return Insts.end(); } 136deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve reverse_iterator rbegin() { return Insts.rbegin(); } 137deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_reverse_iterator rbegin() const { return Insts.rbegin(); } 138deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve reverse_iterator rend () { return Insts.rend(); } 139deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve const_reverse_iterator rend () const { return Insts.rend(); } 140deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 14176456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG iterators 14276456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator pred_iterator; 14376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_pred_iterator; 14476456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::iterator succ_iterator; 14576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke typedef std::vector<MachineBasicBlock *>::const_iterator const_succ_iterator; 1466603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 1476603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator; 1486603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 1496603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator; 1506603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::reverse_iterator 1516603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator; 1526603d7ec67e64b987451975771759ade4e9f19baEvan Cheng typedef std::vector<MachineBasicBlock *>::const_reverse_iterator 1536603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator; 154ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 155cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_begin() { return Predecessors.begin(); } 156cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_begin() const { return Predecessors.begin(); } 157cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner pred_iterator pred_end() { return Predecessors.end(); } 158cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_pred_iterator pred_end() const { return Predecessors.end(); } 1596603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rbegin() 1606603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 1616603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rbegin() const 1626603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rbegin();} 1636603d7ec67e64b987451975771759ade4e9f19baEvan Cheng pred_reverse_iterator pred_rend() 1646603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 1656603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_pred_reverse_iterator pred_rend() const 1666603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Predecessors.rend(); } 16734cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned pred_size() const { 16834cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Predecessors.size(); 16934cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 170cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool pred_empty() const { return Predecessors.empty(); } 171cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_begin() { return Successors.begin(); } 172cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_begin() const { return Successors.begin(); } 173cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner succ_iterator succ_end() { return Successors.end(); } 174cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner const_succ_iterator succ_end() const { return Successors.end(); } 1756603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rbegin() 1766603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 1776603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rbegin() const 1786603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rbegin(); } 1796603d7ec67e64b987451975771759ade4e9f19baEvan Cheng succ_reverse_iterator succ_rend() 1806603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 1816603d7ec67e64b987451975771759ade4e9f19baEvan Cheng const_succ_reverse_iterator succ_rend() const 1826603d7ec67e64b987451975771759ade4e9f19baEvan Cheng { return Successors.rend(); } 18334cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned succ_size() const { 18434cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng return (unsigned)Successors.size(); 18534cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng } 186cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner bool succ_empty() const { return Successors.empty(); } 18776456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 18813d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // LiveIn management methods. 18913d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 19013d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// addLiveIn - Add the specified register as a live in. Note that it 19113d828567812041c1ca1817f4b66fce840903a1fEvan Cheng /// is an error to add the same register to the same set more than once. 19213d828567812041c1ca1817f4b66fce840903a1fEvan Cheng void addLiveIn(unsigned Reg) { LiveIns.push_back(Reg); } 19313d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 194b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// removeLiveIn - Remove the specified register from the live in set. 195b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// 196b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng void removeLiveIn(unsigned Reg); 197b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng 198a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// isLiveIn - Return true if the specified register is in the live in set. 199a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng /// 200a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng bool isLiveIn(unsigned Reg) const; 201a971dbdde27fd4ff53dbebdd4aaf87826d081aa2Evan Cheng 20213d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // Iteration support for live in sets. These sets are kept in sorted 20313d828567812041c1ca1817f4b66fce840903a1fEvan Cheng // order by their register number. 20481bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman typedef std::vector<unsigned>::const_iterator livein_iterator; 20581bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_begin() const { return LiveIns.begin(); } 20681bf03eb5cd68243eabb52505105aa5f4a831bf3Dan Gohman livein_iterator livein_end() const { return LiveIns.end(); } 20713d828567812041c1ca1817f4b66fce840903a1fEvan Cheng bool livein_empty() const { return LiveIns.empty(); } 20813d828567812041c1ca1817f4b66fce840903a1fEvan Cheng 209fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// getAlignment - Return alignment of the basic block. 210fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 211fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng unsigned getAlignment() const { return Alignment; } 212fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 213fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// setAlignment - Set alignment of the basic block. 214fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng /// 215fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng void setAlignment(unsigned Align) { Alignment = Align; } 216fb8075d03f5c87bd57dcc9c5f2304f6b13c55aadEvan Cheng 21730b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// isLandingPad - Returns true if the block is a landing pad. That is 21830b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 21930b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey bool isLandingPad() const { return IsLandingPad; } 22030b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 22130b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// setIsLandingPad - Indicates the block is a landing pad. That is 22230b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey /// this basic block is entered via an exception handler. 22330b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey void setIsLandingPad() { IsLandingPad = true; } 22430b8e51addc23fb317c03d093a25828d3d5be45aJim Laskey 22534ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner // Code Layout methods. 22634ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner 22734ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// moveBefore/moveAfter - move 'this' block before or after the specified 22834ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// block. This only moves the block, it does not modify the CFG or adjust 22934ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner /// potential fall-throughs at the end of the block. 23034ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveBefore(MachineBasicBlock *NewAfter); 23134ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner void moveAfter(MachineBasicBlock *NewBefore); 2327707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 2337707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// updateTerminator - Update the terminator instructions in block to account 2347707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// for changes to the layout. If the block previously used a fallthrough, 2357707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// it may now need a branch, and if it previously used branching it may now 2367707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach /// be able to use a fallthrough. 2377707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach void updateTerminator(); 2387707a0df5b00c8326a581205639d6b2871f182e9Jim Grosbach 23976456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke // Machine-CFG mutators 24034ea07692f4cd7c007f1c5062bcebb6d03131077Chris Lattner 24176456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// addSuccessor - Add succ as a successor of this MachineBasicBlock. 24276456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// The Predecessors list of succ is automatically updated. 24376456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 2443dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void addSuccessor(MachineBasicBlock *succ); 24576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 246dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove successor from the successors list of this 24776456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// MachineBasicBlock. The Predecessors list of succ is automatically updated. 24876456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke /// 2493dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removeSuccessor(MachineBasicBlock *succ); 250dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner 251dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// removeSuccessor - Remove specified successor from the successors list of 252dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// this MachineBasicBlock. The Predecessors list of succ is automatically 2538a46d342d8cbca7c9c7be6c66007d41329babad0David Greene /// updated. Return the iterator to the element after the one removed. 254dc4a4922d32b470acd68498d41e3b8130cf1e74eChris Lattner /// 2558a46d342d8cbca7c9c7be6c66007d41329babad0David Greene succ_iterator removeSuccessor(succ_iterator I); 256cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner 25763307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// transferSuccessors - Transfers all the successors from MBB to this 25863307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang /// machine basic block (i.e., copies all the successors fromMBB and 2591edb8e0910db4cda46a81a4abad80a2a755442aaDan Gohman /// remove all the successors from fromMBB). 26063307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang void transferSuccessors(MachineBasicBlock *fromMBB); 26163307c335aa08b0d6a75f81d64d79af7e90eb78bMon P Wang 262cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// isSuccessor - Return true if the specified MBB is a successor of this 263cd5bad37112ba22f4c546e5443714570b4104bb6Chris Lattner /// block. 2646d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isSuccessor(const MachineBasicBlock *MBB) const; 26576456bc40c79fcae4da52d34f96c079d9759257cBrian Gaeke 2666ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// isLayoutSuccessor - Return true if the specified MBB will be emitted 2676ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// immediately after this block, such that if this block exits by 2686ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// falling through, control will transfer to the specified MBB. Note 2696ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// that MBB need not be a successor at all, for example if this block 2706ade6f55a836129af634074e96f660ff23f59a30Dan Gohman /// ends with an unconditional branch to some other block. 2716d1b89e74f98470d05666ca9f59a8ec5d04b5eb4Dan Gohman bool isLayoutSuccessor(const MachineBasicBlock *MBB) const; 2726ade6f55a836129af634074e96f660ff23f59a30Dan Gohman 27315acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// canFallThrough - Return true if the block can implicitly transfer 27415acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// control to the block after it by falling off the end of it. This should 27515acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// return false if it can reach the block after it, but it uses an explicit 27615acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson /// branch to do so (e.g., a table jump). True is a conservative answer. 27715acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson bool canFallThrough(); 27815acadde5f87703da5f36721a19c09a7e3f97f53Bob Wilson 279743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// getFirstTerminator - returns an iterator to the first terminator 280743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// instruction of this basic block. If a terminator does not exist, 281743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos /// it returns end() 282743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos iterator getFirstTerminator(); 283743d0a1f831f1d5a3141a6ca730558f40c35690aAlkis Evlogimenos 2840bbcd6bfd1a90c2aa7386a88ba9fc9aba47d03a7Brian Gaeke void pop_front() { Insts.pop_front(); } 285f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void pop_back() { Insts.pop_back(); } 286deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve void push_back(MachineInstr *MI) { Insts.push_back(MI); } 287deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve template<typename IT> 288deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve void insert(iterator I, IT S, IT E) { Insts.insert(I, S, E); } 289deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator insert(iterator I, MachineInstr *M) { return Insts.insert(I, M); } 290deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 29146d6a1aeb549a2e4ccd982a1a2cefda541d79c52Vikram S. Adve // erase - Remove the specified element or range from the instruction list. 292c0b9dc5be79f009d260edb5cd5e1d8346587aaa2Alkis Evlogimenos // These functions delete any instructions removed. 293deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve // 29446d6a1aeb549a2e4ccd982a1a2cefda541d79c52Vikram S. Adve iterator erase(iterator I) { return Insts.erase(I); } 295deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve iterator erase(iterator I, iterator E) { return Insts.erase(I, E); } 29683706a5a3a6f19451765b743c5a72b62f74eb71aChris Lattner MachineInstr *remove(MachineInstr *I) { return Insts.remove(I); } 297da44b151259525abc9c299f89b9532f3a9883b4eBrian Gaeke void clear() { Insts.clear(); } 298ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman 299c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// splice - Take an instruction from MBB 'Other' at the position From, 300c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman /// and insert it into this MBB right before 'where'. 301c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman void splice(iterator where, MachineBasicBlock *Other, iterator From) { 302c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman Insts.splice(where, Other->Insts, From); 303c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman } 304c475c3608a5f0fc0c6bd43da04ae786649690070Dan Gohman 305f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// splice - Take a block of instructions from MBB 'Other' in the range [From, 306f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner /// To), and insert them into this MBB right before 'where'. 307f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner void splice(iterator where, MachineBasicBlock *Other, iterator From, 308f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner iterator To) { 309f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner Insts.splice(where, Other->Insts, From, To); 310f24d879520a615a03f19ced3c7491f7b51934d1cChris Lattner } 3118e7ae9860bd1f29c95e4e10fe151a22aaafafef9Chris Lattner 3128e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// removeFromParent - This method unlinks 'this' from the containing 3138e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function, and returns it, but does not delete it. 3148e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman MachineBasicBlock *removeFromParent(); 3158e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 3168e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// eraseFromParent - This method unlinks 'this' from the containing 3178e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman /// function and deletes it. 3188e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman void eraseFromParent(); 3198e5f2c6f65841542e2a7092553fe42a00048e4c7Dan Gohman 3200370fad74b48388412c52d1325512f2c218487faEvan Cheng /// ReplaceUsesOfBlockWith - Given a machine basic block that branched to 3210370fad74b48388412c52d1325512f2c218487faEvan Cheng /// 'Old', change the code and CFG so that it branches to 'New' instead. 3220370fad74b48388412c52d1325512f2c218487faEvan Cheng void ReplaceUsesOfBlockWith(MachineBasicBlock *Old, MachineBasicBlock *New); 3230370fad74b48388412c52d1325512f2c218487faEvan Cheng 3242bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// CorrectExtraCFGEdges - Various pieces of code can cause excess edges in 3252bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// the CFG to be inserted. If we have proven that MBB can only branch to 3262bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestA and DestB, remove any other MBB successors from the CFG. DestA and 3272bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// DestB can be null. Besides DestA and DestB, retain other edges leading 3282bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// to LandingPads (currently there can be only one; we don't check or require 3292bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng /// that here). Note it is possible that DestA and/or DestB are LandingPads. 3302bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool CorrectExtraCFGEdges(MachineBasicBlock *DestA, 3312bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng MachineBasicBlock *DestB, 3322bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng bool isCond); 3332bdb7d0cc88881857073b36f4a09ebe2f2008c24Evan Cheng 33473e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen /// findDebugLoc - find the next valid DebugLoc starting at MBBI, skipping 3353b1906f48d0b541e5be0bc1918c94a454e908bc0Dale Johannesen /// any DBG_VALUE instructions. Return UnknownLoc if there is none. 33673e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen DebugLoc findDebugLoc(MachineBasicBlock::iterator &MBBI); 33773e884bb3e971b1e794ba2501df15138f73b8b1aDale Johannesen 338f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke // Debugging methods. 339f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke void dump() const; 3402d8e3d20be377112999670f210200b3658762571Chris Lattner void print(raw_ostream &OS) const; 341f13a3f4dd1eaa89ca9a64a1e820b089facca3366Brian Gaeke 342da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// getNumber - MachineBasicBlocks are uniquely numbered at the function 343da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// level, unless they're not in a MachineFunction yet, in which case this 344da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// will return -1. 345da86bdc75c8d36cb7b1f4e785a3749d7c8f8e638Brian Gaeke /// 346c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke int getNumber() const { return Number; } 34720a6d8e63056cc2025e7143a5f7226e079e0bc80Chris Lattner void setNumber(int N) { Number = N; } 348c07d8d8a26f63dfc54dbd0e1ff776763ec6443adBrian Gaeke 349f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// getSymbol - Return the MCSymbol for this basic block. 350f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner /// 3511b2eb0e8a6aaf034675b17be6d853cb1c666200fChris Lattner MCSymbol *getSymbol() const; 352f71cb015c1386ff8adc9ef0aa03fc0f0fc4a6e3eChris Lattner 3538e7ae9860bd1f29c95e4e10fe151a22aaafafef9Chris Lattnerprivate: // Methods used to maintain doubly linked list of blocks... 354fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohman friend struct ilist_traits<MachineBasicBlock>; 3558560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 3568560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke // Machine-CFG mutators 3578560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 3588560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// addPredecessor - Remove pred as a predecessor of this MachineBasicBlock. 3598560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// Don't do this unless you know what you're doing, because it doesn't 3608560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// update pred's successors list. Use pred->addSuccessor instead. 3618560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 3623dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void addPredecessor(MachineBasicBlock *pred); 3638560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke 3648560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// removePredecessor - Remove pred as a predecessor of this 3658560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// MachineBasicBlock. Don't do this unless you know what you're 3668560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// doing, because it doesn't update pred's successors list. Use 3678560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// pred->removeSuccessor instead. 3688560af4f5fe589cf792bd44617c2308c4f087ba8Brian Gaeke /// 3693dfbb558b5e74554104710ed16807fe74ec220a3Chris Lattner void removePredecessor(MachineBasicBlock *pred); 370deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve}; 371deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 3721cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbarraw_ostream& operator<<(raw_ostream &OS, const MachineBasicBlock &MBB); 3730aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 3742a085c34933a6c76e5a86f2680d93c16b0438801Evan Chengvoid WriteAsOperand(raw_ostream &, const MachineBasicBlock*, bool t); 3752a085c34933a6c76e5a86f2680d93c16b0438801Evan Cheng 3760aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 3770aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// GraphTraits specializations for machine basic block graphs (machine-CFGs) 3780aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner//===--------------------------------------------------------------------===// 3790aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 3800aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 3810aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... 3820aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 3830aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 3840aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<MachineBasicBlock *> { 3850aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 3860aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::succ_iterator ChildIteratorType; 3870aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 3880aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(MachineBasicBlock *BB) { return BB; } 389ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 3900aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 3910aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 392ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 3930aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 3940aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 3950aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 3960aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 3970aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<const MachineBasicBlock *> { 3980aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 3990aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_succ_iterator ChildIteratorType; 4000aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4010aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(const MachineBasicBlock *BB) { return BB; } 402ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 4030aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_begin(); 4040aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 405ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 4060aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->succ_end(); 4070aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 4080aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 4090aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4100aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// Provide specializations of GraphTraits to be able to treat a 4110aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// MachineFunction as a graph of MachineBasicBlocks... and to walk it 4120aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// in inverse order. Inverse order for a function is considered 4130aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// to be when traversing the predecessor edges of a MBB 4140aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// instead of the successor edges. 4150aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner// 4160aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<MachineBasicBlock*> > { 4170aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock NodeType; 4180aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::pred_iterator ChildIteratorType; 4190aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<MachineBasicBlock *> G) { 4200aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return G.Graph; 4210aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 422ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 4230aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 4240aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 425ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 4260aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 4270aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 4280aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 4290aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 4300aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattnertemplate <> struct GraphTraits<Inverse<const MachineBasicBlock*> > { 4310aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef const MachineBasicBlock NodeType; 4320aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner typedef MachineBasicBlock::const_pred_iterator ChildIteratorType; 4330aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner static NodeType *getEntryNode(Inverse<const MachineBasicBlock*> G) { 434ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman return G.Graph; 4350aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 436ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_begin(NodeType *N) { 4370aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_begin(); 4380aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 439ea61c358720aa6c7a159d51658b34276316aa841Misha Brukman static inline ChildIteratorType child_end(NodeType *N) { 4400aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner return N->pred_end(); 4410aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner } 4420aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner}; 4430aef12a7a96968a80c38144dfc0a7ae6a9152db9Chris Lattner 444d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke} // End llvm namespace 445deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve 446deb9654056939a12981446f6ed1139dca3412746Vikram S. Adve#endif 447