1444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson//===- MachineDominators.cpp - Machine Dominator Calculation --------------===// 2444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson// 3444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson// The LLVM Compiler Infrastructure 4444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson// 5081ce940e7351e90fff829320b7dc6738a6b3815Chris Lattner// This file is distributed under the University of Illinois Open Source 6081ce940e7351e90fff829320b7dc6738a6b3815Chris Lattner// License. See LICENSE.TXT for details. 7444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson// 8444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson//===----------------------------------------------------------------------===// 9444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson// 10444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson// This file implements simple dominator construction algorithms for finding 11444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson// forward dominators on machine functions. 12444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson// 13444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson//===----------------------------------------------------------------------===// 14444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson 15444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson#include "llvm/CodeGen/MachineDominators.h" 166226436fd365f491a87914451dcd2b04137994e9Bill Wendling#include "llvm/CodeGen/Passes.h" 17444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson 18444710d3e044f06eea20ce1206dc096b095c3efdOwen Andersonusing namespace llvm; 19444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson 2086dd20e4ab83c6d96b5a526bc95fc0ee6170e4ecJohn McCallnamespace llvm { 21444710d3e044f06eea20ce1206dc096b095c3efdOwen AndersonTEMPLATE_INSTANTIATION(class DomTreeNodeBase<MachineBasicBlock>); 22444710d3e044f06eea20ce1206dc096b095c3efdOwen AndersonTEMPLATE_INSTANTIATION(class DominatorTreeBase<MachineBasicBlock>); 2386dd20e4ab83c6d96b5a526bc95fc0ee6170e4ecJohn McCall} 24444710d3e044f06eea20ce1206dc096b095c3efdOwen Anderson 25cd8a384d01180db29d126f166ab386b8040426f9Chris Lattnerchar MachineDominatorTree::ID = 0; 26cd8a384d01180db29d126f166ab386b8040426f9Chris Lattner 27291fe21a327d29b43f44bf3a58d44f65fc72a293Owen AndersonINITIALIZE_PASS(MachineDominatorTree, "machinedomtree", 281434dfa8cead98bd1e63411fcb9424e1d37f61acOwen Anderson "MachineDominator Tree Construction", true, true) 296226436fd365f491a87914451dcd2b04137994e9Bill Wendling 307569322765651f19eea0609fb082e6b267d5d2b5Owen Andersonchar &llvm::MachineDominatorsID = MachineDominatorTree::ID; 31c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman 32c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohmanvoid MachineDominatorTree::getAnalysisUsage(AnalysisUsage &AU) const { 33c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman AU.setPreservesAll(); 34c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman MachineFunctionPass::getAnalysisUsage(AU); 35c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman} 36c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman 37c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohmanbool MachineDominatorTree::runOnMachineFunction(MachineFunction &F) { 38c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman DT->recalculate(F); 39c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman 40c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman return false; 41c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman} 42c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman 43c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan GohmanMachineDominatorTree::MachineDominatorTree() 447569322765651f19eea0609fb082e6b267d5d2b5Owen Anderson : MachineFunctionPass(ID) { 45a65d6a686e6ad865c61aec70c5bdfb30bf6f5b22Owen Anderson initializeMachineDominatorTreePass(*PassRegistry::getPassRegistry()); 46c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman DT = new DominatorTreeBase<MachineBasicBlock>(false); 47c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman} 48c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman 49c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan GohmanMachineDominatorTree::~MachineDominatorTree() { 50c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman delete DT; 51c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman} 52c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman 53c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohmanvoid MachineDominatorTree::releaseMemory() { 54c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman DT->releaseMemory(); 55c24a3f87f866e96b2a9ad691c78113651eaa77d1Dan Gohman} 56a7a9daa051617d5d01fdeaa84585cba498e1c96eChris Lattner 57397f4560780d34da0bd1e4c9b9101c6f0774e8ffChris Lattnervoid MachineDominatorTree::print(raw_ostream &OS, const Module*) const { 58397f4560780d34da0bd1e4c9b9101c6f0774e8ffChris Lattner DT->print(OS); 59a7a9daa051617d5d01fdeaa84585cba498e1c96eChris Lattner} 60