17842a741eb0e1baa35af8c3bb5884655c1edaa9eJim Grosbach//===-- LiveRangeEdit.cpp - Basic tools for editing a register live range -===// 2a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen// 3a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen// The LLVM Compiler Infrastructure 4a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen// 5a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen// This file is distributed under the University of Illinois Open Source 6a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen// License. See LICENSE.TXT for details. 7a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen// 8a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 9a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen// 10a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen// The LiveRangeEdit class represents changes done to a virtual register when it 11a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen// is spilled or split. 12a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 13a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen 14cf610d07de3ba4929bb5d00e084877dd974b44a1Jakob Stoklund Olesen#define DEBUG_TYPE "regalloc" 15a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen#include "VirtRegMap.h" 165881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen#include "llvm/ADT/SetVector.h" 17e9bd4ea5fda4957c373a3bbc14803d9670041dccJakob Stoklund Olesen#include "llvm/ADT/Statistic.h" 186094bd87d845afabba5b99ec4848fa6116bac682Jakob Stoklund Olesen#include "llvm/CodeGen/CalcSpillWeights.h" 19a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen#include "llvm/CodeGen/LiveIntervalAnalysis.h" 20789d5d85ba6e9259a8e0f0bcfbd06a59ad164512Pete Cooper#include "llvm/CodeGen/LiveRangeEdit.h" 21a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen#include "llvm/CodeGen/MachineRegisterInfo.h" 22080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen#include "llvm/Target/TargetInstrInfo.h" 235881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen#include "llvm/Support/Debug.h" 245881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen#include "llvm/Support/raw_ostream.h" 25a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen 26a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesenusing namespace llvm; 27a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen 28e9bd4ea5fda4957c373a3bbc14803d9670041dccJakob Stoklund OlesenSTATISTIC(NumDCEDeleted, "Number of instructions deleted by DCE"); 29e9bd4ea5fda4957c373a3bbc14803d9670041dccJakob Stoklund OlesenSTATISTIC(NumDCEFoldedLoads, "Number of single use loads folded after DCE"); 30e9bd4ea5fda4957c373a3bbc14803d9670041dccJakob Stoklund OlesenSTATISTIC(NumFracRanges, "Number of live ranges fractured by DCE"); 31e9bd4ea5fda4957c373a3bbc14803d9670041dccJakob Stoklund Olesen 322d24e2a396a1d211baaeedf32148a3b657240170David Blaikievoid LiveRangeEdit::Delegate::anchor() { } 332d24e2a396a1d211baaeedf32148a3b657240170David Blaikie 348a06af96698537377275dd7848db69915638dd26Pete CooperLiveInterval &LiveRangeEdit::createFrom(unsigned OldReg) { 356a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen unsigned VReg = MRI.createVirtualRegister(MRI.getRegClass(OldReg)); 362e267ae7b8caf7192a3793eb3b78937ff83f794dPete Cooper if (VRM) { 372e267ae7b8caf7192a3793eb3b78937ff83f794dPete Cooper VRM->grow(); 382e267ae7b8caf7192a3793eb3b78937ff83f794dPete Cooper VRM->setIsSplitFromReg(VReg, VRM->getOriginal(OldReg)); 392e267ae7b8caf7192a3793eb3b78937ff83f794dPete Cooper } 406a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen LiveInterval &LI = LIS.getOrCreateInterval(VReg); 41c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen NewRegs.push_back(&LI); 426a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen return LI; 43a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen} 44a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen 453b7d917dec53a742fcb14802557ee75d35185968Jakob Stoklund Olesenbool LiveRangeEdit::checkRematerializable(VNInfo *VNI, 462ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen const MachineInstr *DefMI, 472ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen AliasAnalysis *aa) { 482ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen assert(DefMI && "Missing instruction"); 49c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen ScannedRemattable = true; 508a06af96698537377275dd7848db69915638dd26Pete Cooper if (!TII.isTriviallyReMaterializable(DefMI, aa)) 513b7d917dec53a742fcb14802557ee75d35185968Jakob Stoklund Olesen return false; 52c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen Remattable.insert(VNI); 533b7d917dec53a742fcb14802557ee75d35185968Jakob Stoklund Olesen return true; 542ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen} 552ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen 568a06af96698537377275dd7848db69915638dd26Pete Coopervoid LiveRangeEdit::scanRemattable(AliasAnalysis *aa) { 5720942dcd8634ad75091fe89669868cfebf74e869Jakob Stoklund Olesen for (LiveInterval::vni_iterator I = getParent().vni_begin(), 5820942dcd8634ad75091fe89669868cfebf74e869Jakob Stoklund Olesen E = getParent().vni_end(); I != E; ++I) { 59080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen VNInfo *VNI = *I; 60080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen if (VNI->isUnused()) 61080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen continue; 628a06af96698537377275dd7848db69915638dd26Pete Cooper MachineInstr *DefMI = LIS.getInstructionFromIndex(VNI->def); 63080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen if (!DefMI) 64080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen continue; 658a06af96698537377275dd7848db69915638dd26Pete Cooper checkRematerializable(VNI, DefMI, aa); 66080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen } 67c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen ScannedRemattable = true; 68080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen} 69080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen 708a06af96698537377275dd7848db69915638dd26Pete Cooperbool LiveRangeEdit::anyRematerializable(AliasAnalysis *aa) { 71c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen if (!ScannedRemattable) 728a06af96698537377275dd7848db69915638dd26Pete Cooper scanRemattable(aa); 73c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen return !Remattable.empty(); 74080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen} 75080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen 76a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen/// allUsesAvailableAt - Return true if all registers used by OrigMI at 77a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen/// OrigIdx are also available with the same value at UseIdx. 78a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesenbool LiveRangeEdit::allUsesAvailableAt(const MachineInstr *OrigMI, 79a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen SlotIndex OrigIdx, 808a06af96698537377275dd7848db69915638dd26Pete Cooper SlotIndex UseIdx) { 812debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen OrigIdx = OrigIdx.getRegSlot(true); 822debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen UseIdx = UseIdx.getRegSlot(true); 83a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen for (unsigned i = 0, e = OrigMI->getNumOperands(); i != e; ++i) { 84a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen const MachineOperand &MO = OrigMI->getOperand(i); 85834a9cdbb78c1a16c8ceecb018a324a3ba31c365Jakob Stoklund Olesen if (!MO.isReg() || !MO.getReg() || !MO.readsReg()) 86a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen continue; 87a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen 88834a9cdbb78c1a16c8ceecb018a324a3ba31c365Jakob Stoklund Olesen // We can't remat physreg uses, unless it is a constant. 89834a9cdbb78c1a16c8ceecb018a324a3ba31c365Jakob Stoklund Olesen if (TargetRegisterInfo::isPhysicalRegister(MO.getReg())) { 90834a9cdbb78c1a16c8ceecb018a324a3ba31c365Jakob Stoklund Olesen if (MRI.isConstantPhysReg(MO.getReg(), VRM->getMachineFunction())) 91834a9cdbb78c1a16c8ceecb018a324a3ba31c365Jakob Stoklund Olesen continue; 92834a9cdbb78c1a16c8ceecb018a324a3ba31c365Jakob Stoklund Olesen return false; 93834a9cdbb78c1a16c8ceecb018a324a3ba31c365Jakob Stoklund Olesen } 94834a9cdbb78c1a16c8ceecb018a324a3ba31c365Jakob Stoklund Olesen 958a06af96698537377275dd7848db69915638dd26Pete Cooper LiveInterval &li = LIS.getInterval(MO.getReg()); 96a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen const VNInfo *OVNI = li.getVNInfoAt(OrigIdx); 97a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen if (!OVNI) 98a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen continue; 99a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen if (OVNI != li.getVNInfoAt(UseIdx)) 100a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen return false; 101a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen } 102a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen return true; 103a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen} 104a17768f5822ab62bc18608e5ba473187bf726b84Jakob Stoklund Olesen 105b80e973c95034e5754d888140497a9658a7c1dedJakob Stoklund Olesenbool LiveRangeEdit::canRematerializeAt(Remat &RM, 106b80e973c95034e5754d888140497a9658a7c1dedJakob Stoklund Olesen SlotIndex UseIdx, 1078a06af96698537377275dd7848db69915638dd26Pete Cooper bool cheapAsAMove) { 108c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen assert(ScannedRemattable && "Call anyRematerializable first"); 109080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen 110080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen // Use scanRemattable info. 111c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen if (!Remattable.count(RM.ParentVNI)) 112b80e973c95034e5754d888140497a9658a7c1dedJakob Stoklund Olesen return false; 113080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen 1142ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen // No defining instruction provided. 1152ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen SlotIndex DefIdx; 1162ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen if (RM.OrigMI) 1178a06af96698537377275dd7848db69915638dd26Pete Cooper DefIdx = LIS.getInstructionIndex(RM.OrigMI); 1182ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen else { 1192ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen DefIdx = RM.ParentVNI->def; 1208a06af96698537377275dd7848db69915638dd26Pete Cooper RM.OrigMI = LIS.getInstructionFromIndex(DefIdx); 1212ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen assert(RM.OrigMI && "No defining instruction for remattable value"); 1222ef661b0e8de0d4186c5f9cc990adce0a2493b17Jakob Stoklund Olesen } 123080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen 124080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen // If only cheap remats were requested, bail out early. 1255a96b3dad2f634c9081c8b2b6c2575441dc5a2bdEvan Cheng if (cheapAsAMove && !RM.OrigMI->isAsCheapAsAMove()) 126b80e973c95034e5754d888140497a9658a7c1dedJakob Stoklund Olesen return false; 127080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen 128080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen // Verify that all used registers are available with the same values. 1298a06af96698537377275dd7848db69915638dd26Pete Cooper if (!allUsesAvailableAt(RM.OrigMI, DefIdx, UseIdx)) 130b80e973c95034e5754d888140497a9658a7c1dedJakob Stoklund Olesen return false; 131080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen 132b80e973c95034e5754d888140497a9658a7c1dedJakob Stoklund Olesen return true; 133080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen} 134080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen 135080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund OlesenSlotIndex LiveRangeEdit::rematerializeAt(MachineBasicBlock &MBB, 136080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen MachineBasicBlock::iterator MI, 137080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen unsigned DestReg, 138080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen const Remat &RM, 139bb30dd40ed0873e39fec4dfa321091a0c8d1abfcJakob Stoklund Olesen const TargetRegisterInfo &tri, 140bb30dd40ed0873e39fec4dfa321091a0c8d1abfcJakob Stoklund Olesen bool Late) { 141080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen assert(RM.OrigMI && "Invalid remat"); 1428a06af96698537377275dd7848db69915638dd26Pete Cooper TII.reMaterialize(MBB, MI, DestReg, 0, RM.OrigMI, tri); 143c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen Rematted.insert(RM.ParentVNI); 1448a06af96698537377275dd7848db69915638dd26Pete Cooper return LIS.getSlotIndexes()->insertMachineInstrInMaps(--MI, Late) 1452debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen .getRegSlot(); 146080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen} 147080c316ff8a066cd164d9a8f92df509d8cb63110Jakob Stoklund Olesen 1488a06af96698537377275dd7848db69915638dd26Pete Coopervoid LiveRangeEdit::eraseVirtReg(unsigned Reg) { 149c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen if (TheDelegate && TheDelegate->LRE_CanEraseVirtReg(Reg)) 1507792e980c43536814ea42448db9799b4da32fef6Jakob Stoklund Olesen LIS.removeInterval(Reg); 1517792e980c43536814ea42448db9799b4da32fef6Jakob Stoklund Olesen} 1527792e980c43536814ea42448db9799b4da32fef6Jakob Stoklund Olesen 1533520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesenbool LiveRangeEdit::foldAsLoad(LiveInterval *LI, 1548a06af96698537377275dd7848db69915638dd26Pete Cooper SmallVectorImpl<MachineInstr*> &Dead) { 1553520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen MachineInstr *DefMI = 0, *UseMI = 0; 1563520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen 1573520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen // Check that there is a single def and a single use. 1583520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen for (MachineRegisterInfo::reg_nodbg_iterator I = MRI.reg_nodbg_begin(LI->reg), 1593520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen E = MRI.reg_nodbg_end(); I != E; ++I) { 1603520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen MachineOperand &MO = I.getOperand(); 1613520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen MachineInstr *MI = MO.getParent(); 1623520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen if (MO.isDef()) { 1633520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen if (DefMI && DefMI != MI) 1643520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen return false; 1655a96b3dad2f634c9081c8b2b6c2575441dc5a2bdEvan Cheng if (!MI->canFoldAsLoad()) 1663520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen return false; 1673520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen DefMI = MI; 1683520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen } else if (!MO.isUndef()) { 1693520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen if (UseMI && UseMI != MI) 1703520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen return false; 1713520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen // FIXME: Targets don't know how to fold subreg uses. 1723520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen if (MO.getSubReg()) 1733520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen return false; 1743520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen UseMI = MI; 1753520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen } 1763520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen } 1773520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen if (!DefMI || !UseMI) 1783520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen return false; 1793520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen 1802ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen // Since we're moving the DefMI load, make sure we're not extending any live 1812ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen // ranges. 1822ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen if (!allUsesAvailableAt(DefMI, 1832ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen LIS.getInstructionIndex(DefMI), 1842ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen LIS.getInstructionIndex(UseMI))) 1852ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen return false; 1862ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen 1872ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen // We also need to make sure it is safe to move the load. 1882ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen // Assume there are stores between DefMI and UseMI. 1892ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen bool SawStore = true; 1902ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen if (!DefMI->isSafeToMove(&TII, 0, SawStore)) 1912ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen return false; 1922ec0cda5d5ede57022eb7dc5e7170f4fa420cb2bJakob Stoklund Olesen 1933520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen DEBUG(dbgs() << "Try to fold single def: " << *DefMI 1943520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen << " into single use: " << *UseMI); 1953520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen 1963520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen SmallVector<unsigned, 8> Ops; 1973520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen if (UseMI->readsWritesVirtualRegister(LI->reg, &Ops).second) 1983520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen return false; 1993520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen 2003520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen MachineInstr *FoldMI = TII.foldMemoryOperand(UseMI, Ops, DefMI); 2013520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen if (!FoldMI) 2023520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen return false; 2033520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen DEBUG(dbgs() << " folded: " << *FoldMI); 2043520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen LIS.ReplaceMachineInstrInMaps(UseMI, FoldMI); 2053520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen UseMI->eraseFromParent(); 2063520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen DefMI->addRegisterDead(LI->reg, 0); 2073520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen Dead.push_back(DefMI); 208e9bd4ea5fda4957c373a3bbc14803d9670041dccJakob Stoklund Olesen ++NumDCEFoldedLoads; 2093520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen return true; 2103520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen} 2113520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen 2125881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesenvoid LiveRangeEdit::eliminateDeadDefs(SmallVectorImpl<MachineInstr*> &Dead, 2134777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper ArrayRef<unsigned> RegsBeingSpilled) { 2145881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen SetVector<LiveInterval*, 2155881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen SmallVector<LiveInterval*, 8>, 2165881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen SmallPtrSet<LiveInterval*, 8> > ToShrink; 2175881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen 2185881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen for (;;) { 2195881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen // Erase all dead defs. 2205881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen while (!Dead.empty()) { 2215881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen MachineInstr *MI = Dead.pop_back_val(); 2225881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen assert(MI->allDefsAreDead() && "Def isn't really dead"); 2232debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen SlotIndex Idx = LIS.getInstructionIndex(MI).getRegSlot(); 2245881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen 2255881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen // Never delete inline asm. 226c46570dc05851395829bef904bb6ddb1260400d1Jakob Stoklund Olesen if (MI->isInlineAsm()) { 227c46570dc05851395829bef904bb6ddb1260400d1Jakob Stoklund Olesen DEBUG(dbgs() << "Won't delete: " << Idx << '\t' << *MI); 2285881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen continue; 229c46570dc05851395829bef904bb6ddb1260400d1Jakob Stoklund Olesen } 2305881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen 2315881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen // Use the same criteria as DeadMachineInstructionElim. 2325881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen bool SawStore = false; 233c46570dc05851395829bef904bb6ddb1260400d1Jakob Stoklund Olesen if (!MI->isSafeToMove(&TII, 0, SawStore)) { 234c46570dc05851395829bef904bb6ddb1260400d1Jakob Stoklund Olesen DEBUG(dbgs() << "Can't delete: " << Idx << '\t' << *MI); 2355881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen continue; 236c46570dc05851395829bef904bb6ddb1260400d1Jakob Stoklund Olesen } 2375881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen 2385881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen DEBUG(dbgs() << "Deleting dead def " << Idx << '\t' << *MI); 2395881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen 24076ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen // Collect virtual registers to be erased after MI is gone. 24176ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen SmallVector<unsigned, 8> RegsToErase; 242e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen bool ReadsPhysRegs = false; 24376ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen 2445881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen // Check for live intervals that may shrink 2455881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen for (MachineInstr::mop_iterator MOI = MI->operands_begin(), 2465881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen MOE = MI->operands_end(); MOI != MOE; ++MOI) { 2475881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen if (!MOI->isReg()) 2485881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen continue; 2495881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen unsigned Reg = MOI->getReg(); 250e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen if (!TargetRegisterInfo::isVirtualRegister(Reg)) { 251e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen // Check if MI reads any unreserved physregs. 252e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen if (Reg && MOI->readsReg() && !LIS.isReserved(Reg)) 253e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen ReadsPhysRegs = true; 2545881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen continue; 255e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen } 2565881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen LiveInterval &LI = LIS.getInterval(Reg); 257cc5c4296fda7270e8394626d7254596f5f9c8d82Jakob Stoklund Olesen 2581edc3cf65d54130542fc91bac67ecf616ef88d48Jakob Stoklund Olesen // Shrink read registers, unless it is likely to be expensive and 2591edc3cf65d54130542fc91bac67ecf616ef88d48Jakob Stoklund Olesen // unlikely to change anything. We typically don't want to shrink the 2601edc3cf65d54130542fc91bac67ecf616ef88d48Jakob Stoklund Olesen // PIC base register that has lots of uses everywhere. 2611edc3cf65d54130542fc91bac67ecf616ef88d48Jakob Stoklund Olesen // Always shrink COPY uses that probably come from live range splitting. 2621edc3cf65d54130542fc91bac67ecf616ef88d48Jakob Stoklund Olesen if (MI->readsVirtualRegister(Reg) && 2631edc3cf65d54130542fc91bac67ecf616ef88d48Jakob Stoklund Olesen (MI->isCopy() || MOI->isDef() || MRI.hasOneNonDBGUse(Reg) || 2641edc3cf65d54130542fc91bac67ecf616ef88d48Jakob Stoklund Olesen LI.killedAt(Idx))) 2655881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen ToShrink.insert(&LI); 266cc5c4296fda7270e8394626d7254596f5f9c8d82Jakob Stoklund Olesen 267cc5c4296fda7270e8394626d7254596f5f9c8d82Jakob Stoklund Olesen // Remove defined value. 268cc5c4296fda7270e8394626d7254596f5f9c8d82Jakob Stoklund Olesen if (MOI->isDef()) { 269cc5c4296fda7270e8394626d7254596f5f9c8d82Jakob Stoklund Olesen if (VNInfo *VNI = LI.getVNInfoAt(Idx)) { 270c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen if (TheDelegate) 271c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen TheDelegate->LRE_WillShrinkVirtReg(LI.reg); 272cc5c4296fda7270e8394626d7254596f5f9c8d82Jakob Stoklund Olesen LI.removeValNo(VNI); 27376ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen if (LI.empty()) 27476ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen RegsToErase.push_back(Reg); 275cc5c4296fda7270e8394626d7254596f5f9c8d82Jakob Stoklund Olesen } 276cc5c4296fda7270e8394626d7254596f5f9c8d82Jakob Stoklund Olesen } 2775881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen } 2785881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen 279e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen // Currently, we don't support DCE of physreg live ranges. If MI reads 280e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen // any unreserved physregs, don't erase the instruction, but turn it into 281e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen // a KILL instead. This way, the physreg live ranges don't end up 282e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen // dangling. 283e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen // FIXME: It would be better to have something like shrinkToUses() for 284e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen // physregs. That could potentially enable more DCE and it would free up 285e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen // the physreg. It would not happen often, though. 286e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen if (ReadsPhysRegs) { 287e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen MI->setDesc(TII.get(TargetOpcode::KILL)); 288e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen // Remove all operands that aren't physregs. 289e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen for (unsigned i = MI->getNumOperands(); i; --i) { 290e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen const MachineOperand &MO = MI->getOperand(i-1); 291e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen if (MO.isReg() && TargetRegisterInfo::isPhysicalRegister(MO.getReg())) 292e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen continue; 293e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen MI->RemoveOperand(i-1); 294e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen } 295e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen DEBUG(dbgs() << "Converted physregs to:\t" << *MI); 296e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen } else { 297e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen if (TheDelegate) 298e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen TheDelegate->LRE_WillEraseInstruction(MI); 299e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen LIS.RemoveMachineInstrFromMaps(MI); 300e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen MI->eraseFromParent(); 301e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen ++NumDCEDeleted; 302e2b83ab056836067e2c86ef22223a4c29fe267ceJakob Stoklund Olesen } 30376ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen 30476ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen // Erase any virtregs that are now empty and unused. There may be <undef> 30576ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen // uses around. Keep the empty live range in that case. 30676ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen for (unsigned i = 0, e = RegsToErase.size(); i != e; ++i) { 30776ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen unsigned Reg = RegsToErase[i]; 30876ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen if (LIS.hasInterval(Reg) && MRI.reg_nodbg_empty(Reg)) { 30976ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen ToShrink.remove(&LIS.getInterval(Reg)); 31076ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen eraseVirtReg(Reg); 31176ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen } 31276ff7418361c1c80ce9d018bce63511a70bd7390Jakob Stoklund Olesen } 3135881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen } 3145881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen 3155881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen if (ToShrink.empty()) 3165881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen break; 3175881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen 3185881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen // Shrink just one live interval. Then delete new dead defs. 3191d5b84508173b93faf513032b3847152e6060791Jakob Stoklund Olesen LiveInterval *LI = ToShrink.back(); 3205881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen ToShrink.pop_back(); 3218a06af96698537377275dd7848db69915638dd26Pete Cooper if (foldAsLoad(LI, Dead)) 3223520019931c2bad615c35edcb943cd1e8582ebacJakob Stoklund Olesen continue; 323c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen if (TheDelegate) 324c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen TheDelegate->LRE_WillShrinkVirtReg(LI->reg); 3256a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen if (!LIS.shrinkToUses(LI, &Dead)) 3266a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen continue; 3274777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper 3284777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper // Don't create new intervals for a register being spilled. 3294777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper // The new intervals would have to be spilled anyway so its not worth it. 3304777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper // Also they currently aren't spilled so creating them and not spilling 3314777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper // them results in incorrect code. 3324777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper bool BeingSpilled = false; 3334777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper for (unsigned i = 0, e = RegsBeingSpilled.size(); i != e; ++i) { 3344777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper if (LI->reg == RegsBeingSpilled[i]) { 3354777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper BeingSpilled = true; 3364777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper break; 3374777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper } 3384777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper } 3394777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper 3404777ebb767d1b590c05d502c4a7f6adef4e6d5d1Pete Cooper if (BeingSpilled) continue; 3416a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen 3426a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen // LI may have been separated, create new intervals. 3436a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen LI->RenumberValues(LIS); 3446a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen ConnectedVNInfoEqClasses ConEQ(LIS); 3456a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen unsigned NumComp = ConEQ.Classify(LI); 3466a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen if (NumComp <= 1) 3476a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen continue; 348e9bd4ea5fda4957c373a3bbc14803d9670041dccJakob Stoklund Olesen ++NumFracRanges; 3492e267ae7b8caf7192a3793eb3b78937ff83f794dPete Cooper bool IsOriginal = VRM && VRM->getOriginal(LI->reg) == LI->reg; 3506a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen DEBUG(dbgs() << NumComp << " components: " << *LI << '\n'); 3516a3dbd3b25bbc99bd1a233d6a74ddea3493ba6acJakob Stoklund Olesen SmallVector<LiveInterval*, 8> Dups(1, LI); 352f22ca3fe5f0cfbb832cf41270f97cf5c0134fd7bJakob Stoklund Olesen for (unsigned i = 1; i != NumComp; ++i) { 3538a06af96698537377275dd7848db69915638dd26Pete Cooper Dups.push_back(&createFrom(LI->reg)); 3549693d4c3f0d0e8c91e4748eb1c18799b1de7551cJakob Stoklund Olesen // If LI is an original interval that hasn't been split yet, make the new 3559693d4c3f0d0e8c91e4748eb1c18799b1de7551cJakob Stoklund Olesen // intervals their own originals instead of referring to LI. The original 3569693d4c3f0d0e8c91e4748eb1c18799b1de7551cJakob Stoklund Olesen // interval must contain all the split products, and LI doesn't. 3579693d4c3f0d0e8c91e4748eb1c18799b1de7551cJakob Stoklund Olesen if (IsOriginal) 3588a06af96698537377275dd7848db69915638dd26Pete Cooper VRM->setIsSplitFromReg(Dups.back()->reg, 0); 359c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen if (TheDelegate) 360c696c8bd35a8ab293879e821142dd9136201f16eJakob Stoklund Olesen TheDelegate->LRE_DidCloneVirtReg(Dups.back()->reg, LI->reg); 361f22ca3fe5f0cfbb832cf41270f97cf5c0134fd7bJakob Stoklund Olesen } 3621edc3cf65d54130542fc91bac67ecf616ef88d48Jakob Stoklund Olesen ConEQ.Distribute(&Dups[0], MRI); 3637ebed91fddbcd259d03c4b438719ac1ce2a4fc87Jakob Stoklund Olesen DEBUG({ 3647ebed91fddbcd259d03c4b438719ac1ce2a4fc87Jakob Stoklund Olesen for (unsigned i = 0; i != NumComp; ++i) 3657ebed91fddbcd259d03c4b438719ac1ce2a4fc87Jakob Stoklund Olesen dbgs() << '\t' << *Dups[i] << '\n'; 3667ebed91fddbcd259d03c4b438719ac1ce2a4fc87Jakob Stoklund Olesen }); 3675881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen } 3685881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen} 3695881799d0cccbd814ec1b0f0509df9be1f63c6cbJakob Stoklund Olesen 3706094bd87d845afabba5b99ec4848fa6116bac682Jakob Stoklund Olesenvoid LiveRangeEdit::calculateRegClassAndHint(MachineFunction &MF, 3716094bd87d845afabba5b99ec4848fa6116bac682Jakob Stoklund Olesen const MachineLoopInfo &Loops) { 3726094bd87d845afabba5b99ec4848fa6116bac682Jakob Stoklund Olesen VirtRegAuxInfo VRAI(MF, LIS, Loops); 3736094bd87d845afabba5b99ec4848fa6116bac682Jakob Stoklund Olesen for (iterator I = begin(), E = end(); I != E; ++I) { 3746094bd87d845afabba5b99ec4848fa6116bac682Jakob Stoklund Olesen LiveInterval &LI = **I; 3756d1fd0b979cb88809ebb77a24f4da69e1d67606bJakob Stoklund Olesen if (MRI.recomputeRegClass(LI.reg, MF.getTarget())) 3766d1fd0b979cb88809ebb77a24f4da69e1d67606bJakob Stoklund Olesen DEBUG(dbgs() << "Inflated " << PrintReg(LI.reg) << " to " 3776d1fd0b979cb88809ebb77a24f4da69e1d67606bJakob Stoklund Olesen << MRI.getRegClass(LI.reg)->getName() << '\n'); 3786094bd87d845afabba5b99ec4848fa6116bac682Jakob Stoklund Olesen VRAI.CalculateWeightAndHint(LI); 3796094bd87d845afabba5b99ec4848fa6116bac682Jakob Stoklund Olesen } 3806094bd87d845afabba5b99ec4848fa6116bac682Jakob Stoklund Olesen} 381