SelectionDAGISel.cpp revision 9bbcd5ee5b9a34f82d7d0570256ff4b4f53fabe9
11c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===-- SelectionDAGISel.cpp - Implement the SelectionDAGISel class -------===// 2edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 31c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// The LLVM Compiler Infrastructure 41c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 54ee451de366474b9c228b4e5fa573795a715216dChris Lattner// This file is distributed under the University of Illinois Open Source 64ee451de366474b9c228b4e5fa573795a715216dChris Lattner// License. See LICENSE.TXT for details. 7edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 81c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 91c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// This implements the SelectionDAGISel class. 111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#define DEBUG_TYPE "isel" 1584fbac580941548a6ab1121ed3b0ffdc4e2bc080Dan Gohman#include "ScheduleDAGSDNodes.h" 162048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman#include "SelectionDAGBuilder.h" 176277eb2bb997a5da0808a8a5a57f18fd9faaf336Dan Gohman#include "FunctionLoweringInfo.h" 1884fbac580941548a6ab1121ed3b0ffdc4e2bc080Dan Gohman#include "llvm/CodeGen/SelectionDAGISel.h" 19c7c3f110eda0ff8040e4bd99e38d3112b910810fJim Laskey#include "llvm/Analysis/AliasAnalysis.h" 20713f043c16220b746804f668a72f4e0344cbe4d1Devang Patel#include "llvm/Analysis/DebugInfo.h" 215502bf67cd49221583c15472150905ce13184d36Anton Korobeynikov#include "llvm/Constants.h" 22adf6a965a321372c640845407195594835921eb4Chris Lattner#include "llvm/CallingConv.h" 231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/DerivedTypes.h" 241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Function.h" 2536ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner#include "llvm/GlobalVariable.h" 26ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner#include "llvm/InlineAsm.h" 271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instructions.h" 281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Intrinsics.h" 2943970fec322d9e0153ca513de41d80af1c79bddeJim Laskey#include "llvm/IntrinsicInst.h" 3075c478a96a542dc386152e00518441e63d22058dChris Lattner#include "llvm/LLVMContext.h" 3178eca170e9ac5db7fd525f9bbf27090fefcbb646Dan Gohman#include "llvm/CodeGen/FastISel.h" 325a29c9eed157af51a8d338b5a225b146881819e8Gordon Henriksen#include "llvm/CodeGen/GCStrategy.h" 335eca075b74d62c621b160aa216b4cd50829a2cc7Gordon Henriksen#include "llvm/CodeGen/GCMetadata.h" 341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFunction.h" 35ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman#include "llvm/CodeGen/MachineFunctionAnalysis.h" 361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFrameInfo.h" 371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineInstrBuilder.h" 3884bc5427d6883f73cfeae3da640acd011d35c006Chris Lattner#include "llvm/CodeGen/MachineJumpTableInfo.h" 3984bc5427d6883f73cfeae3da640acd011d35c006Chris Lattner#include "llvm/CodeGen/MachineModuleInfo.h" 4084bc5427d6883f73cfeae3da640acd011d35c006Chris Lattner#include "llvm/CodeGen/MachineRegisterInfo.h" 41fc54c552963545a81e4ea38e60460590afb2d5aeDan Gohman#include "llvm/CodeGen/ScheduleHazardRecognizer.h" 42eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey#include "llvm/CodeGen/SchedulerRegistry.h" 431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SelectionDAG.h" 446e7a1617ac4a34792d9097b8d3644b72f57a45f7Devang Patel#include "llvm/CodeGen/DwarfWriter.h" 456f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman#include "llvm/Target/TargetRegisterInfo.h" 461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetData.h" 471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetFrameInfo.h" 48e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman#include "llvm/Target/TargetIntrinsicInfo.h" 491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetInstrInfo.h" 501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetLowering.h" 511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetMachine.h" 52124729155d860a0850eb4ef2a7cea4145e13a057Vladimir Prus#include "llvm/Target/TargetOptions.h" 53a4f0b3a084d120cfc5b5bb06f64b222f5cb72740Chris Lattner#include "llvm/Support/Compiler.h" 54db8d56b825efeb576d67b9dbe39d736d93306222Evan Cheng#include "llvm/Support/Debug.h" 557d696d80409aad20bb5da0fc4eccab941dd371d4Torok Edwin#include "llvm/Support/ErrorHandling.h" 56db8d56b825efeb576d67b9dbe39d736d93306222Evan Cheng#include "llvm/Support/MathExtras.h" 57db8d56b825efeb576d67b9dbe39d736d93306222Evan Cheng#include "llvm/Support/Timer.h" 58ce63ffb52f249b62cdf2d250c128007b13f27e71Daniel Dunbar#include "llvm/Support/raw_ostream.h" 59c19ae9d91d30bc008e0be5f5d4727f333199f64cChris Lattner#include "llvm/ADT/Statistic.h" 607e88103cdea8c36b2229dae8c60def14e3816512Jeff Cohen#include <algorithm> 611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerusing namespace llvm; 621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 63c19ae9d91d30bc008e0be5f5d4727f333199f64cChris LattnerSTATISTIC(NumFastIselFailures, "Number of instructions fast isel failed on"); 64c19ae9d91d30bc008e0be5f5d4727f333199f64cChris Lattner 65ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattnerstatic cl::opt<bool> 66293d5f8bc02a9148238b2c79484637f56de65b9cDan GohmanEnableFastISelVerbose("fast-isel-verbose", cl::Hidden, 67d659d50482e2f9edf8f436e4a1aa30c68c6d020bDan Gohman cl::desc("Enable verbose messages in the \"fast\" " 68293d5f8bc02a9148238b2c79484637f56de65b9cDan Gohman "instruction selector")); 69293d5f8bc02a9148238b2c79484637f56de65b9cDan Gohmanstatic cl::opt<bool> 704344a5d0d7b280f0b891e0e6a4413b059d9080b3Dan GohmanEnableFastISelAbort("fast-isel-abort", cl::Hidden, 714344a5d0d7b280f0b891e0e6a4413b059d9080b3Dan Gohman cl::desc("Enable abort calls when \"fast\" instruction fails")); 728a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohmanstatic cl::opt<bool> 73df8ed024735b651d6e0082262d4e7a00b2fa4d32Evan ChengSchedLiveInCopies("schedule-livein-copies", cl::Hidden, 748a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman cl::desc("Schedule copies of livein registers"), 758a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman cl::init(false)); 76ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner 77da8abb02397d7cd62a1e16e7c534edd7096ac873Chris Lattner#ifndef NDEBUG 787944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattnerstatic cl::opt<bool> 79462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan GohmanViewDAGCombine1("view-dag-combine1-dags", cl::Hidden, 80462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman cl::desc("Pop up a window to show dags before the first " 81462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman "dag combine pass")); 82462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohmanstatic cl::opt<bool> 83462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan GohmanViewLegalizeTypesDAGs("view-legalize-types-dags", cl::Hidden, 84462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman cl::desc("Pop up a window to show dags before legalize types")); 85462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohmanstatic cl::opt<bool> 86462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan GohmanViewLegalizeDAGs("view-legalize-dags", cl::Hidden, 87462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman cl::desc("Pop up a window to show dags before legalize")); 88462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohmanstatic cl::opt<bool> 89462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan GohmanViewDAGCombine2("view-dag-combine2-dags", cl::Hidden, 90462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman cl::desc("Pop up a window to show dags before the second " 91462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman "dag combine pass")); 92462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohmanstatic cl::opt<bool> 9325cf2275ff7de3de3bc0e508abaf457413d74725Duncan SandsViewDAGCombineLT("view-dag-combine-lt-dags", cl::Hidden, 9425cf2275ff7de3de3bc0e508abaf457413d74725Duncan Sands cl::desc("Pop up a window to show dags before the post legalize types" 9525cf2275ff7de3de3bc0e508abaf457413d74725Duncan Sands " dag combine pass")); 9625cf2275ff7de3de3bc0e508abaf457413d74725Duncan Sandsstatic cl::opt<bool> 97a9c2091cd38e401c846391c9951ff416e709b65eEvan ChengViewISelDAGs("view-isel-dags", cl::Hidden, 98a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng cl::desc("Pop up a window to show isel dags as they are selected")); 99a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengstatic cl::opt<bool> 100a9c2091cd38e401c846391c9951ff416e709b65eEvan ChengViewSchedDAGs("view-sched-dags", cl::Hidden, 101a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng cl::desc("Pop up a window to show sched dags as they are processed")); 1023e1a7aef17575d9c7058a035449d57e3c7295ed0Dan Gohmanstatic cl::opt<bool> 1033e1a7aef17575d9c7058a035449d57e3c7295ed0Dan GohmanViewSUnitDAGs("view-sunit-dags", cl::Hidden, 1045bab78527a946632cd9614daa0b9a82ee7b5e1ccChris Lattner cl::desc("Pop up a window to show SUnit dags after they are processed")); 1057944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#else 106462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohmanstatic const bool ViewDAGCombine1 = false, 107462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman ViewLegalizeTypesDAGs = false, ViewLegalizeDAGs = false, 108462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman ViewDAGCombine2 = false, 10925cf2275ff7de3de3bc0e508abaf457413d74725Duncan Sands ViewDAGCombineLT = false, 110462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman ViewISelDAGs = false, ViewSchedDAGs = false, 111462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman ViewSUnitDAGs = false; 1127944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#endif 1137944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner 114eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey//===---------------------------------------------------------------------===// 115eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey/// 116eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey/// RegisterScheduler class - Track the registration of instruction schedulers. 117eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey/// 118eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey//===---------------------------------------------------------------------===// 119eb577ba3b815a1fa4627b060dd2345d17abf672dJim LaskeyMachinePassRegistry RegisterScheduler::Registry; 120eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey 121eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey//===---------------------------------------------------------------------===// 122eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey/// 123eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey/// ISHeuristic command line option for instruction schedulers. 124eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey/// 125eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey//===---------------------------------------------------------------------===// 126844731a7f1909f55935e3514c9e713a62d67662eDan Gohmanstatic cl::opt<RegisterScheduler::FunctionPassCtor, false, 127844731a7f1909f55935e3514c9e713a62d67662eDan Gohman RegisterPassParser<RegisterScheduler> > 128844731a7f1909f55935e3514c9e713a62d67662eDan GohmanISHeuristic("pre-RA-sched", 129844731a7f1909f55935e3514c9e713a62d67662eDan Gohman cl::init(&createDefaultScheduler), 130844731a7f1909f55935e3514c9e713a62d67662eDan Gohman cl::desc("Instruction schedulers available (before register" 131844731a7f1909f55935e3514c9e713a62d67662eDan Gohman " allocation):")); 13213ec702c430b91ee49b9e6d9581cd95412f216c8Jim Laskey 133844731a7f1909f55935e3514c9e713a62d67662eDan Gohmanstatic RegisterScheduler 134b8cab9227a0f6ffbdaae33e3c64268e265008a6aDan GohmandefaultListDAGScheduler("default", "Best scheduler for the target", 135844731a7f1909f55935e3514c9e713a62d67662eDan Gohman createDefaultScheduler); 1364ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng 137f0cbcd48804961b05359ee41859bbd7774f41fe0Dan Gohmannamespace llvm { 138f0cbcd48804961b05359ee41859bbd7774f41fe0Dan Gohman //===--------------------------------------------------------------------===// 139f0cbcd48804961b05359ee41859bbd7774f41fe0Dan Gohman /// createDefaultScheduler - This creates an instruction scheduler appropriate 140f0cbcd48804961b05359ee41859bbd7774f41fe0Dan Gohman /// for the target. 14147ac0f0c7c39289f5970688154e385be22b7f293Dan Gohman ScheduleDAGSDNodes* createDefaultScheduler(SelectionDAGISel *IS, 14298a366d547772010e94609e4584489b3e5ce0043Bill Wendling CodeGenOpt::Level OptLevel) { 143e9530ecae4897fe8157bd4d7616043bd8c0484e2Dan Gohman const TargetLowering &TLI = IS->getTargetLowering(); 144e9530ecae4897fe8157bd4d7616043bd8c0484e2Dan Gohman 14598a366d547772010e94609e4584489b3e5ce0043Bill Wendling if (OptLevel == CodeGenOpt::None) 146be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling return createFastDAGScheduler(IS, OptLevel); 1479e76fea3abd4229749e6ead46a0016cabff4a056Dan Gohman if (TLI.getSchedulingPreference() == TargetLowering::SchedulingForLatency) 148be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling return createTDListDAGScheduler(IS, OptLevel); 1499e76fea3abd4229749e6ead46a0016cabff4a056Dan Gohman assert(TLI.getSchedulingPreference() == 150187361b056823df4ff292561fe47468dad956872Bill Wendling TargetLowering::SchedulingForRegPressure && "Unknown sched type!"); 151be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling return createBURRListDAGScheduler(IS, OptLevel); 1523a508c94a6c6f124e8b0549358ce76deb92ab662Chris Lattner } 1531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 155ff9b373e8f5006c629af81e2619778b4c4f5249eEvan Cheng// EmitInstrWithCustomInserter - This method should be implemented by targets 156533297b58da8c74bec65551e1aface9801fc2259Dan Gohman// that mark instructions with the 'usesCustomInserter' flag. These 157025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// instructions are special in various ways, which require special support to 158025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// insert. The specified MachineInstr is created but not inserted into any 159533297b58da8c74bec65551e1aface9801fc2259Dan Gohman// basic blocks, and this method is called to expand it into a sequence of 160533297b58da8c74bec65551e1aface9801fc2259Dan Gohman// instructions, potentially also creating new basic blocks and control flow. 161533297b58da8c74bec65551e1aface9801fc2259Dan Gohman// When new basic blocks are inserted and the edges from MBB to its successors 162533297b58da8c74bec65551e1aface9801fc2259Dan Gohman// are modified, the method should insert pairs of <OldSucc, NewSucc> into the 163533297b58da8c74bec65551e1aface9801fc2259Dan Gohman// DenseMap. 164ff9b373e8f5006c629af81e2619778b4c4f5249eEvan ChengMachineBasicBlock *TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI, 165fb2e752e4175920d0531f2afc93a23d0cdf4db14Evan Cheng MachineBasicBlock *MBB, 166fb2e752e4175920d0531f2afc93a23d0cdf4db14Evan Cheng DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const { 167f36892335b4919b9120e48a792e6b3630b9de978Torok Edwin#ifndef NDEBUG 1681a053236f165ac60ee88edca370a732d278aa2c1David Greene dbgs() << "If a target marks an instruction with " 169533297b58da8c74bec65551e1aface9801fc2259Dan Gohman "'usesCustomInserter', it must implement " 170f36892335b4919b9120e48a792e6b3630b9de978Torok Edwin "TargetLowering::EmitInstrWithCustomInserter!"; 171f36892335b4919b9120e48a792e6b3630b9de978Torok Edwin#endif 172c23197a26f34f559ea9797de51e187087c039c42Torok Edwin llvm_unreachable(0); 173a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar return 0; 174025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner} 175025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner 1768a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman/// EmitLiveInCopy - Emit a copy for a live in physical register. If the 1778a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman/// physical register has only a single copy use, then coalesced the copy 1788a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman/// if possible. 1798a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohmanstatic void EmitLiveInCopy(MachineBasicBlock *MBB, 1808a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman MachineBasicBlock::iterator &InsertPos, 1818a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman unsigned VirtReg, unsigned PhysReg, 1828a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const TargetRegisterClass *RC, 1838a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman DenseMap<MachineInstr*, unsigned> &CopyRegMap, 1848a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const MachineRegisterInfo &MRI, 1858a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const TargetRegisterInfo &TRI, 1868a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const TargetInstrInfo &TII) { 1878a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman unsigned NumUses = 0; 1888a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman MachineInstr *UseMI = NULL; 1898a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman for (MachineRegisterInfo::use_iterator UI = MRI.use_begin(VirtReg), 1908a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman UE = MRI.use_end(); UI != UE; ++UI) { 1918a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman UseMI = &*UI; 1928a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman if (++NumUses > 1) 1938a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman break; 1948a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman } 1958a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman 1968a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // If the number of uses is not one, or the use is not a move instruction, 1978a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // don't coalesce. Also, only coalesce away a virtual register to virtual 1988a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // register copy. 1998a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman bool Coalesced = false; 20004ee5a1d9267e5e6fab8f088095fcb83c3c5cbd1Evan Cheng unsigned SrcReg, DstReg, SrcSubReg, DstSubReg; 2018a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman if (NumUses == 1 && 20204ee5a1d9267e5e6fab8f088095fcb83c3c5cbd1Evan Cheng TII.isMoveInstr(*UseMI, SrcReg, DstReg, SrcSubReg, DstSubReg) && 2038a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman TargetRegisterInfo::isVirtualRegister(DstReg)) { 2048a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman VirtReg = DstReg; 2058a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman Coalesced = true; 2068a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman } 2078a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman 2088a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // Now find an ideal location to insert the copy. 2098a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman MachineBasicBlock::iterator Pos = InsertPos; 2108a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman while (Pos != MBB->begin()) { 2118a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman MachineInstr *PrevMI = prior(Pos); 2128a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman DenseMap<MachineInstr*, unsigned>::iterator RI = CopyRegMap.find(PrevMI); 2138a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // copyRegToReg might emit multiple instructions to do a copy. 2148a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman unsigned CopyDstReg = (RI == CopyRegMap.end()) ? 0 : RI->second; 2158a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman if (CopyDstReg && !TRI.regsOverlap(CopyDstReg, PhysReg)) 2168a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // This is what the BB looks like right now: 2178a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // r1024 = mov r0 2188a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // ... 2198a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // r1 = mov r1024 2208a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // 2218a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // We want to insert "r1025 = mov r1". Inserting this copy below the 2228a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // move to r1024 makes it impossible for that move to be coalesced. 2238a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // 2248a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // r1025 = mov r1 2258a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // r1024 = mov r0 2268a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // ... 2278a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // r1 = mov 1024 2288a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // r2 = mov 1025 2298a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman break; // Woot! Found a good location. 2308a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman --Pos; 2318a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman } 2328a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman 233f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin bool Emitted = TII.copyRegToReg(*MBB, Pos, VirtReg, PhysReg, RC, RC); 234f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin assert(Emitted && "Unable to issue a live-in copy instruction!\n"); 235f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin (void) Emitted; 236a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 237931424a7d8b8b15ddda7308d6c5b08277d8bdc0eZhongxing Xu CopyRegMap.insert(std::make_pair(prior(Pos), VirtReg)); 2388a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman if (Coalesced) { 2398a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman if (&*InsertPos == UseMI) ++InsertPos; 2408a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman MBB->erase(UseMI); 2418a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman } 2428a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman} 2438a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman 2448a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman/// EmitLiveInCopies - If this is the first basic block in the function, 2458a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman/// and if it has live ins that need to be copied into vregs, emit the 2468a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman/// copies into the block. 2478a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohmanstatic void EmitLiveInCopies(MachineBasicBlock *EntryMBB, 2488a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const MachineRegisterInfo &MRI, 2498a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const TargetRegisterInfo &TRI, 2508a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const TargetInstrInfo &TII) { 2518a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman if (SchedLiveInCopies) { 2528a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // Emit the copies at a heuristically-determined location in the block. 2538a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman DenseMap<MachineInstr*, unsigned> CopyRegMap; 2548a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman MachineBasicBlock::iterator InsertPos = EntryMBB->begin(); 2558a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman for (MachineRegisterInfo::livein_iterator LI = MRI.livein_begin(), 2568a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman E = MRI.livein_end(); LI != E; ++LI) 2578a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman if (LI->second) { 2588a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const TargetRegisterClass *RC = MRI.getRegClass(LI->second); 2598a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman EmitLiveInCopy(EntryMBB, InsertPos, LI->second, LI->first, 2608a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman RC, CopyRegMap, MRI, TRI, TII); 2618a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman } 2628a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman } else { 2638a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // Emit the copies into the top of the block. 2648a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman for (MachineRegisterInfo::livein_iterator LI = MRI.livein_begin(), 2658a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman E = MRI.livein_end(); LI != E; ++LI) 2668a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman if (LI->second) { 2678a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const TargetRegisterClass *RC = MRI.getRegClass(LI->second); 268f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin bool Emitted = TII.copyRegToReg(*EntryMBB, EntryMBB->begin(), 269f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin LI->second, LI->first, RC, RC); 270f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin assert(Emitted && "Unable to issue a live-in copy instruction!\n"); 271f1daf7d8abebd6e0104a6b41a774ccbb19a51c60David Goodwin (void) Emitted; 2728a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman } 2738a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman } 2748a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman} 2758a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman 2767041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 2777041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner// SelectionDAGISel code 2787041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 2791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 28098a366d547772010e94609e4584489b3e5ce0043Bill WendlingSelectionDAGISel::SelectionDAGISel(TargetMachine &tm, CodeGenOpt::Level OL) : 281ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman MachineFunctionPass(&ID), TM(tm), TLI(*tm.getTargetLowering()), 2827c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman FuncInfo(new FunctionLoweringInfo(TLI)), 2837c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman CurDAG(new SelectionDAG(TLI, *FuncInfo)), 2842048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB(new SelectionDAGBuilder(*CurDAG, TLI, *FuncInfo, OL)), 2857c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman GFI(), 286be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling OptLevel(OL), 2877c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman DAGSize(0) 2887c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman{} 2897c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman 2907c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan GohmanSelectionDAGISel::~SelectionDAGISel() { 2912048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman delete SDB; 2927c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman delete CurDAG; 2937c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman delete FuncInfo; 2947c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman} 2957c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman 296e50ed30282bb5b4a9ed952580523f2dda16215acOwen Andersonunsigned SelectionDAGISel::MakeReg(EVT VT) { 29784bc5427d6883f73cfeae3da640acd011d35c006Chris Lattner return RegInfo->createVirtualRegister(TLI.getRegClassFor(VT)); 2981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 300495a0b51915eb763576874f29192820b731edc22Chris Lattnervoid SelectionDAGISel::getAnalysisUsage(AnalysisUsage &AU) const { 301c7c3f110eda0ff8040e4bd99e38d3112b910810fJim Laskey AU.addRequired<AliasAnalysis>(); 302a3477fe06df794e0eae26ea243f25912c619a6c4Dan Gohman AU.addPreserved<AliasAnalysis>(); 3035eca075b74d62c621b160aa216b4cd50829a2cc7Gordon Henriksen AU.addRequired<GCModuleInfo>(); 304a3477fe06df794e0eae26ea243f25912c619a6c4Dan Gohman AU.addPreserved<GCModuleInfo>(); 3056e7a1617ac4a34792d9097b8d3644b72f57a45f7Devang Patel AU.addRequired<DwarfWriter>(); 306a3477fe06df794e0eae26ea243f25912c619a6c4Dan Gohman AU.addPreserved<DwarfWriter>(); 307ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman MachineFunctionPass::getAnalysisUsage(AU); 308495a0b51915eb763576874f29192820b731edc22Chris Lattner} 3091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 310ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohmanbool SelectionDAGISel::runOnMachineFunction(MachineFunction &mf) { 311ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman Function &Fn = *mf.getFunction(); 312ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman 3134344a5d0d7b280f0b891e0e6a4413b059d9080b3Dan Gohman // Do some sanity-checking on the command-line options. 3144344a5d0d7b280f0b891e0e6a4413b059d9080b3Dan Gohman assert((!EnableFastISelVerbose || EnableFastISel) && 3154344a5d0d7b280f0b891e0e6a4413b059d9080b3Dan Gohman "-fast-isel-verbose requires -fast-isel"); 3164344a5d0d7b280f0b891e0e6a4413b059d9080b3Dan Gohman assert((!EnableFastISelAbort || EnableFastISel) && 3174344a5d0d7b280f0b891e0e6a4413b059d9080b3Dan Gohman "-fast-isel-abort requires -fast-isel"); 3184344a5d0d7b280f0b891e0e6a4413b059d9080b3Dan Gohman 3195f43f92c69aae9837064cf08291db1b36a82789fDan Gohman // Get alias analysis for load/store combining. 3205f43f92c69aae9837064cf08291db1b36a82789fDan Gohman AA = &getAnalysis<AliasAnalysis>(); 3215f43f92c69aae9837064cf08291db1b36a82789fDan Gohman 322ad2afc2a421a0e41603d5eee412d4d8c77e9bc1cDan Gohman MF = &mf; 3238a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const TargetInstrInfo &TII = *TM.getInstrInfo(); 3248a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman const TargetRegisterInfo &TRI = *TM.getRegisterInfo(); 3258a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman 326f7d6cd46e920776bb33913b2498347cf99358dc4Dan Gohman if (Fn.hasGC()) 327f7d6cd46e920776bb33913b2498347cf99358dc4Dan Gohman GFI = &getAnalysis<GCModuleInfo>().getFunctionInfo(Fn); 328ce2247755e56f99a2377b64a1a9d393726582b85Gordon Henriksen else 3295eca075b74d62c621b160aa216b4cd50829a2cc7Gordon Henriksen GFI = 0; 33079ce276083ced01256a0eb7d80731e4948ca6e87Dan Gohman RegInfo = &MF->getRegInfo(); 3311a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "\n\n\n=== " << Fn.getName() << "\n"); 3321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3331465d61bdd36cfd6021036a527895f0dd358e97dDuncan Sands MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>(); 3341465d61bdd36cfd6021036a527895f0dd358e97dDuncan Sands DwarfWriter *DW = getAnalysisIfAvailable<DwarfWriter>(); 3355dcaceb0a6a7fcf508d9898547e10d374b0e4cd1Owen Anderson CurDAG->init(*MF, MMI, DW); 3366277eb2bb997a5da0808a8a5a57f18fd9faaf336Dan Gohman FuncInfo->set(Fn, *MF, EnableFastISel); 3372048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->init(GFI, *AA); 3381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3391532f3ddd77c362dd5f613af06b4de636e3c5b0eDale Johannesen for (Function::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) 3401532f3ddd77c362dd5f613af06b4de636e3c5b0eDale Johannesen if (InvokeInst *Invoke = dyn_cast<InvokeInst>(I->getTerminator())) 3411532f3ddd77c362dd5f613af06b4de636e3c5b0eDale Johannesen // Mark landing pad. 3427c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman FuncInfo->MBBMap[Invoke->getSuccessor(1)]->setIsLandingPad(); 3439fac0b5ff24e733072bdde68c7f34590c1892922Duncan Sands 34479ce276083ced01256a0eb7d80731e4948ca6e87Dan Gohman SelectAllBasicBlocks(Fn, *MF, MMI, DW, TII); 345edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 3468a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // If the first basic block in the function has live ins that need to be 3478a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // copied into vregs, emit the copies into the top of the block before 3488a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman // emitting the code for the block. 34979ce276083ced01256a0eb7d80731e4948ca6e87Dan Gohman EmitLiveInCopies(MF->begin(), *RegInfo, TRI, TII); 3508a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman 351ad2070c667ebabf1650be63e6b3e0b411da86918Evan Cheng // Add function live-ins to entry block live-in set. 3528a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman for (MachineRegisterInfo::livein_iterator I = RegInfo->livein_begin(), 3538a11053f3ca7efb29312c4293c4fdb5d2ca3e20fDan Gohman E = RegInfo->livein_end(); I != E; ++I) 35479ce276083ced01256a0eb7d80731e4948ca6e87Dan Gohman MF->begin()->addLiveIn(I->first); 355ad2070c667ebabf1650be63e6b3e0b411da86918Evan Cheng 356f40708223e409a152834b1553c6883ff2035b957Duncan Sands#ifndef NDEBUG 3577c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman assert(FuncInfo->CatchInfoFound.size() == FuncInfo->CatchInfoLost.size() && 358f40708223e409a152834b1553c6883ff2035b957Duncan Sands "Not all catch info was assigned to a landing pad!"); 359f40708223e409a152834b1553c6883ff2035b957Duncan Sands#endif 360f40708223e409a152834b1553c6883ff2035b957Duncan Sands 3617c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman FuncInfo->clear(); 3627c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman 3631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 3641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 3651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 36607f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman/// SetDebugLoc - Update MF's and SDB's DebugLocs if debug information is 36707f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman/// attached with this instruction. 3683990b121cf4a0b280ed3e54cf13870cbf4259e78Chris Lattnerstatic void SetDebugLoc(unsigned MDDbgKind, Instruction *I, 3693990b121cf4a0b280ed3e54cf13870cbf4259e78Chris Lattner SelectionDAGBuilder *SDB, 3700eb419800ae51d6e0e00a656ede0627483755361Chris Lattner FastISel *FastIS, MachineFunction *MF) { 3710eb419800ae51d6e0e00a656ede0627483755361Chris Lattner if (isa<DbgInfoIntrinsic>(I)) return; 3720eb419800ae51d6e0e00a656ede0627483755361Chris Lattner 3733990b121cf4a0b280ed3e54cf13870cbf4259e78Chris Lattner if (MDNode *Dbg = I->getMetadata(MDDbgKind)) { 3740eb419800ae51d6e0e00a656ede0627483755361Chris Lattner DILocation DILoc(Dbg); 3750eb419800ae51d6e0e00a656ede0627483755361Chris Lattner DebugLoc Loc = ExtractDebugLocation(DILoc, MF->getDebugLocInfo()); 3760eb419800ae51d6e0e00a656ede0627483755361Chris Lattner 3770eb419800ae51d6e0e00a656ede0627483755361Chris Lattner SDB->setCurDebugLoc(Loc); 3780eb419800ae51d6e0e00a656ede0627483755361Chris Lattner 3790eb419800ae51d6e0e00a656ede0627483755361Chris Lattner if (FastIS) 3800eb419800ae51d6e0e00a656ede0627483755361Chris Lattner FastIS->setCurDebugLoc(Loc); 3810eb419800ae51d6e0e00a656ede0627483755361Chris Lattner 3820eb419800ae51d6e0e00a656ede0627483755361Chris Lattner // If the function doesn't have a default debug location yet, set 3830eb419800ae51d6e0e00a656ede0627483755361Chris Lattner // it. This is kind of a hack. 3840eb419800ae51d6e0e00a656ede0627483755361Chris Lattner if (MF->getDefaultDebugLoc().isUnknown()) 3850eb419800ae51d6e0e00a656ede0627483755361Chris Lattner MF->setDefaultDebugLoc(Loc); 3860eb419800ae51d6e0e00a656ede0627483755361Chris Lattner } 38707f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman} 38807f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman 38907f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman/// ResetDebugLoc - Set MF's and SDB's DebugLocs to Unknown. 3903990b121cf4a0b280ed3e54cf13870cbf4259e78Chris Lattnerstatic void ResetDebugLoc(SelectionDAGBuilder *SDB, FastISel *FastIS) { 39107f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman SDB->setCurDebugLoc(DebugLoc::getUnknownLoc()); 39207f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman if (FastIS) 393688fb80334e1ad7b259a051411bb72e18abea9e7Dan Gohman FastIS->setCurDebugLoc(DebugLoc::getUnknownLoc()); 39407f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman} 39507f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman 396f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohmanvoid SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, 397f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman BasicBlock::iterator Begin, 398b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman BasicBlock::iterator End, 399b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman bool &HadTailCall) { 4002048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->setCurrentBasicBlock(BB); 401081134741b40b342fb2f85722c9cea5d412489a8Chris Lattner unsigned MDDbgKind = LLVMBB->getContext().getMDKindID("dbg"); 402f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman 40398ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman // Lower all of the non-terminator instructions. If a call is emitted 40498ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman // as a tail call, cease emitting nodes for this block. 4052048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (BasicBlock::iterator I = Begin; I != End && !SDB->HasTailCall; ++I) { 4063990b121cf4a0b280ed3e54cf13870cbf4259e78Chris Lattner SetDebugLoc(MDDbgKind, I, SDB, 0, MF); 40707f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman 40807f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman if (!isa<TerminatorInst>(I)) { 4092048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->visit(*I); 41007f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman 41107f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman // Set the current debug location back to "unknown" so that it doesn't 41207f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman // spuriously apply to subsequent instructions. 41307f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman ResetDebugLoc(SDB, 0); 41407f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman } 415123eaa71b50f5ac2ea2233685baedddbb72f387bDevang Patel } 416f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman 4172048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman if (!SDB->HasTailCall) { 41898ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman // Ensure that all instructions which are used outside of their defining 41998ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman // blocks are available as virtual registers. Invoke is handled elsewhere. 42098ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman for (BasicBlock::iterator I = Begin; I != End; ++I) 42198ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman if (!isa<PHINode>(I) && !isa<InvokeInst>(I)) 4222048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->CopyToExportRegsIfNeeded(I); 423f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman 42498ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman // Handle PHI nodes in successor blocks. 42598ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman if (End == LLVMBB->end()) { 42698ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman HandlePHINodesInSuccessorBlocks(LLVMBB); 4273df24e667f04a7003342b534310919abc9c87418Dan Gohman 42898ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman // Lower the terminator after the copies are emitted. 4293990b121cf4a0b280ed3e54cf13870cbf4259e78Chris Lattner SetDebugLoc(MDDbgKind, LLVMBB->getTerminator(), SDB, 0, MF); 4302048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->visit(*LLVMBB->getTerminator()); 43107f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman ResetDebugLoc(SDB, 0); 43298ca4f2a325f72374a477f9deba7d09e8999c29bDan Gohman } 4333df24e667f04a7003342b534310919abc9c87418Dan Gohman } 434a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 435a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner // Make sure the root of the DAG is up-to-date. 4362048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman CurDAG->setRoot(SDB->getControlRoot()); 437c85e1716f0e45e4c18a9ef2fbe431a51ac3a4252Arnold Schwaighofer 438f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman // Final step, emit the lowered DAG as machine code. 439f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman CodeGenAndEmitDAG(); 4402048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman HadTailCall = SDB->HasTailCall; 4412048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->clear(); 4421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 4431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 44454e146b935123d3d325e8eb30c2e1f2eca3377acEvan Chengnamespace { 44554e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng/// WorkListRemover - This class is a DAGUpdateListener that removes any deleted 44654e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng/// nodes from the worklist. 44754e146b935123d3d325e8eb30c2e1f2eca3377acEvan Chengclass SDOPsWorkListRemover : public SelectionDAG::DAGUpdateListener { 44854e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng SmallVector<SDNode*, 128> &Worklist; 44954e146b935123d3d325e8eb30c2e1f2eca3377acEvan Chengpublic: 45054e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng SDOPsWorkListRemover(SmallVector<SDNode*, 128> &wl) : Worklist(wl) {} 45154e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng 45254e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng virtual void NodeDeleted(SDNode *N, SDNode *E) { 45354e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng Worklist.erase(std::remove(Worklist.begin(), Worklist.end(), N), 45454e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng Worklist.end()); 45554e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng } 45654e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng 45754e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng virtual void NodeUpdated(SDNode *N) { 45854e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng // Ignore updates. 45954e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng } 46054e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng}; 46154e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng} 46254e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng 463046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng/// TrivialTruncElim - Eliminate some trivial nops that can result from 464046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng/// ShrinkDemandedOps: (trunc (ext n)) -> n. 465046632f272b22a653c204c0ef56eb4076368d4bbEvan Chengstatic bool TrivialTruncElim(SDValue Op, 466046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng TargetLowering::TargetLoweringOpt &TLO) { 467046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng SDValue N0 = Op.getOperand(0); 468046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng EVT VT = Op.getValueType(); 469046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng if ((N0.getOpcode() == ISD::ZERO_EXTEND || 470046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng N0.getOpcode() == ISD::SIGN_EXTEND || 471046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng N0.getOpcode() == ISD::ANY_EXTEND) && 472046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng N0.getOperand(0).getValueType() == VT) { 473046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng return TLO.CombineTo(Op, N0.getOperand(0)); 474046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng } 475046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng return false; 476046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng} 477046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng 47854eb4c2991796c3014e831fc07e4a6c0a3df10f0Evan Cheng/// ShrinkDemandedOps - A late transformation pass that shrink expressions 47954eb4c2991796c3014e831fc07e4a6c0a3df10f0Evan Cheng/// using TargetLowering::TargetLoweringOpt::ShrinkDemandedOp. It converts 48054eb4c2991796c3014e831fc07e4a6c0a3df10f0Evan Cheng/// x+y to (VT)((SmallVT)x+(SmallVT)y) if the casts are free. 481d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Chengvoid SelectionDAGISel::ShrinkDemandedOps() { 482d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng SmallVector<SDNode*, 128> Worklist; 483d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 484d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng // Add all the dag nodes to the worklist. 485d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng Worklist.reserve(CurDAG->allnodes_size()); 486d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng for (SelectionDAG::allnodes_iterator I = CurDAG->allnodes_begin(), 487d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng E = CurDAG->allnodes_end(); I != E; ++I) 488d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng Worklist.push_back(I); 489d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 490d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng APInt Mask; 491d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng APInt KnownZero; 492d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng APInt KnownOne; 493d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 494d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng TargetLowering::TargetLoweringOpt TLO(*CurDAG, true); 495d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng while (!Worklist.empty()) { 4967b1e2a50a51793428a792a15d2777a4c48e0db49Benjamin Kramer SDNode *N = Worklist.pop_back_val(); 497d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 498d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng if (N->use_empty() && N != CurDAG->getRoot().getNode()) { 49954e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng CurDAG->DeleteNode(N); 500d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng continue; 501d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng } 502d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 503d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng // Run ShrinkDemandedOp on scalar binary operations. 504d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng if (N->getNumValues() == 1 && 505d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng N->getValueType(0).isSimple() && N->getValueType(0).isInteger()) { 506d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng unsigned BitWidth = N->getValueType(0).getScalarType().getSizeInBits(); 507d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng APInt Demanded = APInt::getAllOnesValue(BitWidth); 508d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng APInt KnownZero, KnownOne; 509d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng if (TLI.SimplifyDemandedBits(SDValue(N, 0), Demanded, 510046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng KnownZero, KnownOne, TLO) || 511046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng (N->getOpcode() == ISD::TRUNCATE && 512046632f272b22a653c204c0ef56eb4076368d4bbEvan Cheng TrivialTruncElim(SDValue(N, 0), TLO))) { 513d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng // Revisit the node. 514d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng Worklist.erase(std::remove(Worklist.begin(), Worklist.end(), N), 515d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng Worklist.end()); 516d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng Worklist.push_back(N); 517d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 518d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng // Replace the old value with the new one. 519d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng DEBUG(errs() << "\nReplacing "; 520d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng TLO.Old.getNode()->dump(CurDAG); 521d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng errs() << "\nWith: "; 522d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng TLO.New.getNode()->dump(CurDAG); 523d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng errs() << '\n'); 524d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 525d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng Worklist.push_back(TLO.New.getNode()); 52654e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng 52754e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng SDOPsWorkListRemover DeadNodes(Worklist); 52854e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng CurDAG->ReplaceAllUsesOfValueWith(TLO.Old, TLO.New, &DeadNodes); 529d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 530d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng if (TLO.Old.getNode()->use_empty()) { 531d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng for (unsigned i = 0, e = TLO.Old.getNode()->getNumOperands(); 532d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng i != e; ++i) { 533d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng SDNode *OpNode = TLO.Old.getNode()->getOperand(i).getNode(); 534d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng if (OpNode->hasOneUse()) { 535d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng Worklist.erase(std::remove(Worklist.begin(), Worklist.end(), 53654e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng OpNode), Worklist.end()); 53754e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng Worklist.push_back(OpNode); 538d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng } 539d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng } 540d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 541d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng Worklist.erase(std::remove(Worklist.begin(), Worklist.end(), 54254e146b935123d3d325e8eb30c2e1f2eca3377acEvan Cheng TLO.Old.getNode()), Worklist.end()); 543d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng CurDAG->DeleteNode(TLO.Old.getNode()); 544d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng } 545d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng } 546d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng } 547d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng } 548d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng} 549d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng 550f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohmanvoid SelectionDAGISel::ComputeLiveOutVRegInfo() { 551ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner SmallPtrSet<SDNode*, 128> VisitedNodes; 552ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner SmallVector<SDNode*, 128> Worklist; 553a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 554ba36cb5242eb02b12b277f82b9efe497f7da4d7fGabor Greif Worklist.push_back(CurDAG->getRoot().getNode()); 555a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 556ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner APInt Mask; 557ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner APInt KnownZero; 558ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner APInt KnownOne; 559a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 5607b1e2a50a51793428a792a15d2777a4c48e0db49Benjamin Kramer do { 5617b1e2a50a51793428a792a15d2777a4c48e0db49Benjamin Kramer SDNode *N = Worklist.pop_back_val(); 562a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 563ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner // If we've already seen this node, ignore it. 564ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner if (!VisitedNodes.insert(N)) 565ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner continue; 566a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 567ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner // Otherwise, add all chain operands to the worklist. 568ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) 569825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (N->getOperand(i).getValueType() == MVT::Other) 570ba36cb5242eb02b12b277f82b9efe497f7da4d7fGabor Greif Worklist.push_back(N->getOperand(i).getNode()); 571a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 572ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner // If this is a CopyToReg with a vreg dest, process it. 573ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner if (N->getOpcode() != ISD::CopyToReg) 574ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner continue; 575a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 576ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner unsigned DestReg = cast<RegisterSDNode>(N->getOperand(1))->getReg(); 577ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner if (!TargetRegisterInfo::isVirtualRegister(DestReg)) 578ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner continue; 579a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 580ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner // Ignore non-scalar or non-integer values. 581475871a144eb604ddaf37503397ba0941442e5fbDan Gohman SDValue Src = N->getOperand(2); 582e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = Src.getValueType(); 583ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner if (!SrcVT.isInteger() || SrcVT.isVector()) 584ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner continue; 585a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 586f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman unsigned NumSignBits = CurDAG->ComputeNumSignBits(Src); 587ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner Mask = APInt::getAllOnesValue(SrcVT.getSizeInBits()); 588f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman CurDAG->ComputeMaskedBits(Src, Mask, KnownZero, KnownOne); 589a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 590ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner // Only install this information if it tells us something. 591ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner if (NumSignBits != 1 || KnownZero != 0 || KnownOne != 0) { 592ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner DestReg -= TargetRegisterInfo::FirstVirtualRegister; 593f7d6cd46e920776bb33913b2498347cf99358dc4Dan Gohman if (DestReg >= FuncInfo->LiveOutRegInfo.size()) 594f7d6cd46e920776bb33913b2498347cf99358dc4Dan Gohman FuncInfo->LiveOutRegInfo.resize(DestReg+1); 595f7d6cd46e920776bb33913b2498347cf99358dc4Dan Gohman FunctionLoweringInfo::LiveOutInfo &LOI = 596f7d6cd46e920776bb33913b2498347cf99358dc4Dan Gohman FuncInfo->LiveOutRegInfo[DestReg]; 597ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner LOI.NumSignBits = NumSignBits; 598a80efceb93211a22e13dfc68198da4a25c1a7762Dan Gohman LOI.KnownOne = KnownOne; 599a80efceb93211a22e13dfc68198da4a25c1a7762Dan Gohman LOI.KnownZero = KnownZero; 600ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner } 6017b1e2a50a51793428a792a15d2777a4c48e0db49Benjamin Kramer } while (!Worklist.empty()); 602ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner} 603ead0d88ad7659dabd66cc3149af97d98256fca84Chris Lattner 604f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohmanvoid SelectionDAGISel::CodeGenAndEmitDAG() { 605462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman std::string GroupName; 606462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman if (TimePassesIsEnabled) 607462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman GroupName = "Instruction Selection and Scheduling"; 608462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman std::string BlockName; 609462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman if (ViewDAGCombine1 || ViewLegalizeTypesDAGs || ViewLegalizeDAGs || 61025cf2275ff7de3de3bc0e508abaf457413d74725Duncan Sands ViewDAGCombine2 || ViewDAGCombineLT || ViewISelDAGs || ViewSchedDAGs || 61125cf2275ff7de3de3bc0e508abaf457413d74725Duncan Sands ViewSUnitDAGs) 612f7d6cd46e920776bb33913b2498347cf99358dc4Dan Gohman BlockName = MF->getFunction()->getNameStr() + ":" + 613f6ccee5a9d2b9573f679bca6266ade3eb8cd3f88Daniel Dunbar BB->getBasicBlock()->getNameStr(); 614462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 6151a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Initial selection DAG:\n"); 616f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman DEBUG(CurDAG->dump()); 617462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 618f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman if (ViewDAGCombine1) CurDAG->viewGraph("dag-combine1 input for " + BlockName); 619417e11b9bf625b3626f8765d44248927fb200906Dan Gohman 620af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in pre-legalize mode. 621ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng if (TimePassesIsEnabled) { 6225e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman NamedRegionTimer T("DAG Combining 1", GroupName); 623be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling CurDAG->Combine(Unrestricted, *AA, OptLevel); 624ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } else { 625be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling CurDAG->Combine(Unrestricted, *AA, OptLevel); 626ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } 627a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 6281a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Optimized lowered selection DAG:\n"); 629f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman DEBUG(CurDAG->dump()); 630a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 6311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Second step, hack on the DAG until it only uses operations and types that 6321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the target supports. 633714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman if (ViewLegalizeTypesDAGs) CurDAG->viewGraph("legalize-types input for " + 634714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman BlockName); 635714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman 636714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman bool Changed; 637714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman if (TimePassesIsEnabled) { 638714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman NamedRegionTimer T("Type Legalization", GroupName); 639714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman Changed = CurDAG->LegalizeTypes(); 640714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman } else { 641714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman Changed = CurDAG->LegalizeTypes(); 642714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman } 643714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman 6441a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Type-legalized selection DAG:\n"); 645714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman DEBUG(CurDAG->dump()); 646462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 647714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman if (Changed) { 648714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman if (ViewDAGCombineLT) 649714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman CurDAG->viewGraph("dag-combine-lt input for " + BlockName); 650714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman 651714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman // Run the DAG combiner in post-type-legalize mode. 652462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman if (TimePassesIsEnabled) { 653714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman NamedRegionTimer T("DAG Combining after legalize types", GroupName); 654714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman CurDAG->Combine(NoIllegalTypes, *AA, OptLevel); 655462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman } else { 656714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman CurDAG->Combine(NoIllegalTypes, *AA, OptLevel); 657462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman } 658462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 6591a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Optimized type-legalized selection DAG:\n"); 660f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman DEBUG(CurDAG->dump()); 661714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman } 662462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 663714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman if (TimePassesIsEnabled) { 664714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman NamedRegionTimer T("Vector Legalization", GroupName); 665714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman Changed = CurDAG->LegalizeVectors(); 666714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman } else { 667714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman Changed = CurDAG->LegalizeVectors(); 668714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman } 6695c22c8074404797f1313b1334757254fb5c6487aEli Friedman 670714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman if (Changed) { 6715c22c8074404797f1313b1334757254fb5c6487aEli Friedman if (TimePassesIsEnabled) { 672714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman NamedRegionTimer T("Type Legalization 2", GroupName); 6739882007003b12466df717cdf66824120ede405beBill Wendling CurDAG->LegalizeTypes(); 6745c22c8074404797f1313b1334757254fb5c6487aEli Friedman } else { 6759882007003b12466df717cdf66824120ede405beBill Wendling CurDAG->LegalizeTypes(); 6765c22c8074404797f1313b1334757254fb5c6487aEli Friedman } 6775c22c8074404797f1313b1334757254fb5c6487aEli Friedman 678714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman if (ViewDAGCombineLT) 679714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman CurDAG->viewGraph("dag-combine-lv input for " + BlockName); 6805c22c8074404797f1313b1334757254fb5c6487aEli Friedman 681714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman // Run the DAG combiner in post-type-legalize mode. 682714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman if (TimePassesIsEnabled) { 683714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman NamedRegionTimer T("DAG Combining after legalize vectors", GroupName); 684714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman CurDAG->Combine(NoIllegalOperations, *AA, OptLevel); 685714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman } else { 686714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman CurDAG->Combine(NoIllegalOperations, *AA, OptLevel); 6875c22c8074404797f1313b1334757254fb5c6487aEli Friedman } 688714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman 6891a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Optimized vector-legalized selection DAG:\n"); 690714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman DEBUG(CurDAG->dump()); 69170587ea813986bb0dbef71610091d496e28c22a6Chris Lattner } 692a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 693f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman if (ViewLegalizeDAGs) CurDAG->viewGraph("legalize input for " + BlockName); 694462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 695ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng if (TimePassesIsEnabled) { 6965e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman NamedRegionTimer T("DAG Legalization", GroupName); 697714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman CurDAG->Legalize(OptLevel); 698ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } else { 699714efc63d4319b771d89a95aa7a42d400f03d8c9Dan Gohman CurDAG->Legalize(OptLevel); 700ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } 701a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 7021a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Legalized selection DAG:\n"); 703f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman DEBUG(CurDAG->dump()); 704a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 705f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman if (ViewDAGCombine2) CurDAG->viewGraph("dag-combine2 input for " + BlockName); 706462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 707af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in post-legalize mode. 708ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng if (TimePassesIsEnabled) { 7095e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman NamedRegionTimer T("DAG Combining 2", GroupName); 710be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling CurDAG->Combine(NoIllegalOperations, *AA, OptLevel); 711ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } else { 712be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling CurDAG->Combine(NoIllegalOperations, *AA, OptLevel); 713ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } 714a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 7151a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Optimized legalized selection DAG:\n"); 716f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman DEBUG(CurDAG->dump()); 717417e11b9bf625b3626f8765d44248927fb200906Dan Gohman 718f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman if (ViewISelDAGs) CurDAG->viewGraph("isel input for " + BlockName); 719a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 720d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng if (OptLevel != CodeGenOpt::None) { 721d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng ShrinkDemandedOps(); 722f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman ComputeLiveOutVRegInfo(); 723d40d03e1bd1d51857fc2f9f9230e334c3a32b249Evan Cheng } 724552c4a849422ad91fa9988255ae35aebbf3acf7bEvan Cheng 725a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Third, instruction select all of the operations to machine code, adding the 726a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // code to the MachineBasicBlock. 727ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng if (TimePassesIsEnabled) { 7285e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman NamedRegionTimer T("Instruction Selection", GroupName); 7297c306da505e2d7f64e160890b274a47fa0740962Chris Lattner DoInstructionSelection(); 730ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } else { 7317c306da505e2d7f64e160890b274a47fa0740962Chris Lattner DoInstructionSelection(); 732ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } 733db8d56b825efeb576d67b9dbe39d736d93306222Evan Cheng 7341a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Selected selection DAG:\n"); 735f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman DEBUG(CurDAG->dump()); 736462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 737f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman if (ViewSchedDAGs) CurDAG->viewGraph("scheduler input for " + BlockName); 738462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 7395e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman // Schedule machine code. 74047ac0f0c7c39289f5970688154e385be22b7f293Dan Gohman ScheduleDAGSDNodes *Scheduler = CreateScheduler(); 7415e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman if (TimePassesIsEnabled) { 7425e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman NamedRegionTimer T("Instruction Scheduling", GroupName); 74347ac0f0c7c39289f5970688154e385be22b7f293Dan Gohman Scheduler->Run(CurDAG, BB, BB->end()); 7445e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman } else { 74547ac0f0c7c39289f5970688154e385be22b7f293Dan Gohman Scheduler->Run(CurDAG, BB, BB->end()); 7465e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman } 7475e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman 748462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman if (ViewSUnitDAGs) Scheduler->viewGraph(); 749462dc7f4960e5074ddf4769ec8b2ef1ba7a4d2c8Dan Gohman 750a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar // Emit machine code to BB. This can change 'BB' to the last block being 751db8d56b825efeb576d67b9dbe39d736d93306222Evan Cheng // inserted into. 752ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng if (TimePassesIsEnabled) { 7535e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman NamedRegionTimer T("Instruction Creation", GroupName); 7542048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman BB = Scheduler->EmitSchedule(&SDB->EdgeMapping); 755ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } else { 7562048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman BB = Scheduler->EmitSchedule(&SDB->EdgeMapping); 7575e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman } 7585e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman 7595e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman // Free the scheduler state. 7605e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman if (TimePassesIsEnabled) { 7615e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman NamedRegionTimer T("Instruction Scheduling Cleanup", GroupName); 7625e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman delete Scheduler; 7635e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman } else { 7645e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman delete Scheduler; 765ebffb660a68384dd8b5e2ff36d68e94a3920611bEvan Cheng } 766db8d56b825efeb576d67b9dbe39d736d93306222Evan Cheng 7671a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Selected machine code:\n"); 7681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(BB->dump()); 769a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar} 770f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman 7717c306da505e2d7f64e160890b274a47fa0740962Chris Lattnervoid SelectionDAGISel::DoInstructionSelection() { 7727c306da505e2d7f64e160890b274a47fa0740962Chris Lattner DEBUG(errs() << "===== Instruction selection begins:\n"); 7737c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 7747c306da505e2d7f64e160890b274a47fa0740962Chris Lattner PreprocessISelDAG(); 7757c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 7767c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // Select target instructions for the DAG. 7777c306da505e2d7f64e160890b274a47fa0740962Chris Lattner { 7787c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // Number all nodes with a topological order and set DAGSize. 7797c306da505e2d7f64e160890b274a47fa0740962Chris Lattner DAGSize = CurDAG->AssignTopologicalOrder(); 7807c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 7817c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // Create a dummy node (which is not added to allnodes), that adds 7827c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // a reference to the root node, preventing it from being deleted, 7837c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // and tracking any changes of the root. 7847c306da505e2d7f64e160890b274a47fa0740962Chris Lattner HandleSDNode Dummy(CurDAG->getRoot()); 7857c306da505e2d7f64e160890b274a47fa0740962Chris Lattner ISelPosition = SelectionDAG::allnodes_iterator(CurDAG->getRoot().getNode()); 7867c306da505e2d7f64e160890b274a47fa0740962Chris Lattner ++ISelPosition; 7877c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 7887c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // The AllNodes list is now topological-sorted. Visit the 7897c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // nodes by starting at the end of the list (the root of the 7907c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // graph) and preceding back toward the beginning (the entry 7917c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // node). 7927c306da505e2d7f64e160890b274a47fa0740962Chris Lattner while (ISelPosition != CurDAG->allnodes_begin()) { 7937c306da505e2d7f64e160890b274a47fa0740962Chris Lattner SDNode *Node = --ISelPosition; 7947c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // Skip dead nodes. DAGCombiner is expected to eliminate all dead nodes, 7957c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // but there are currently some corner cases that it misses. Also, this 7967c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // makes it theoretically possible to disable the DAGCombiner. 7977c306da505e2d7f64e160890b274a47fa0740962Chris Lattner if (Node->use_empty()) 7987c306da505e2d7f64e160890b274a47fa0740962Chris Lattner continue; 7997c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 8007c306da505e2d7f64e160890b274a47fa0740962Chris Lattner SDNode *ResNode = Select(Node); 8017c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 80282dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner // FIXME: This is pretty gross. 'Select' should be changed to not return 80382dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner // anything at all and this code should be nuked with a tactical strike. 80482dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner 8057c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // If node should not be replaced, continue with the next one. 80682dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner if (ResNode == Node || Node->getOpcode() == ISD::DELETED_NODE) 8077c306da505e2d7f64e160890b274a47fa0740962Chris Lattner continue; 8087c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // Replace node. 8097c306da505e2d7f64e160890b274a47fa0740962Chris Lattner if (ResNode) 8107c306da505e2d7f64e160890b274a47fa0740962Chris Lattner ReplaceUses(Node, ResNode); 8117c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 8127c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // If after the replacement this node is not used any more, 8137c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // remove this dead node. 8147c306da505e2d7f64e160890b274a47fa0740962Chris Lattner if (Node->use_empty()) { // Don't delete EntryToken, etc. 8157c306da505e2d7f64e160890b274a47fa0740962Chris Lattner ISelUpdater ISU(ISelPosition); 8167c306da505e2d7f64e160890b274a47fa0740962Chris Lattner CurDAG->RemoveDeadNode(Node, &ISU); 8177c306da505e2d7f64e160890b274a47fa0740962Chris Lattner } 8187c306da505e2d7f64e160890b274a47fa0740962Chris Lattner } 8197c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 8207c306da505e2d7f64e160890b274a47fa0740962Chris Lattner CurDAG->setRoot(Dummy.getValue()); 8217c306da505e2d7f64e160890b274a47fa0740962Chris Lattner } 8227c306da505e2d7f64e160890b274a47fa0740962Chris Lattner DEBUG(errs() << "===== Instruction selection ends:\n"); 8237c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 8247c306da505e2d7f64e160890b274a47fa0740962Chris Lattner PostprocessISelDAG(); 8257c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 8267c306da505e2d7f64e160890b274a47fa0740962Chris Lattner // FIXME: This shouldn't be needed, remove it. 8277c306da505e2d7f64e160890b274a47fa0740962Chris Lattner CurDAG->RemoveDeadNodes(); 8287c306da505e2d7f64e160890b274a47fa0740962Chris Lattner} 8297c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 8307c306da505e2d7f64e160890b274a47fa0740962Chris Lattner 83179ce276083ced01256a0eb7d80731e4948ca6e87Dan Gohmanvoid SelectionDAGISel::SelectAllBasicBlocks(Function &Fn, 83279ce276083ced01256a0eb7d80731e4948ca6e87Dan Gohman MachineFunction &MF, 833dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman MachineModuleInfo *MMI, 83483489bb7700c69b7a4a8da59365c42d3f5c8129bDevang Patel DwarfWriter *DW, 835dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman const TargetInstrInfo &TII) { 836a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // Initialize the Fast-ISel state, if needed. 837a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman FastISel *FastIS = 0; 838a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (EnableFastISel) 83979ce276083ced01256a0eb7d80731e4948ca6e87Dan Gohman FastIS = TLI.createFastISel(MF, MMI, DW, 840a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman FuncInfo->ValueMap, 841a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman FuncInfo->MBBMap, 842dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman FuncInfo->StaticAllocaMap 843dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman#ifndef NDEBUG 844dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman , FuncInfo->CatchInfoLost 845dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman#endif 846dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman ); 847a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman 848081134741b40b342fb2f85722c9cea5d412489a8Chris Lattner unsigned MDDbgKind = Fn.getContext().getMDKindID("dbg"); 849123eaa71b50f5ac2ea2233685baedddbb72f387bDevang Patel 850a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // Iterate over all basic blocks in the function. 85139fd6e81b1b0de8b820155dc6a0dae226c109de6Evan Cheng for (Function::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) { 85239fd6e81b1b0de8b820155dc6a0dae226c109de6Evan Cheng BasicBlock *LLVMBB = &*I; 8537c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman BB = FuncInfo->MBBMap[LLVMBB]; 854f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman 8553df24e667f04a7003342b534310919abc9c87418Dan Gohman BasicBlock::iterator const Begin = LLVMBB->begin(); 8563df24e667f04a7003342b534310919abc9c87418Dan Gohman BasicBlock::iterator const End = LLVMBB->end(); 8579f1185076d60153fd35feb3cadb1b4cd8debc0b6Evan Cheng BasicBlock::iterator BI = Begin; 8585edd361497f4c78a20fcbb75c6e7e94ff8046ed1Dan Gohman 8595edd361497f4c78a20fcbb75c6e7e94ff8046ed1Dan Gohman // Lower any arguments needed in this block if this is the entry block. 86033134c4a75558288d663267c8991f6bd37a530afDan Gohman bool SuppressFastISel = false; 86133134c4a75558288d663267c8991f6bd37a530afDan Gohman if (LLVMBB == &Fn.getEntryBlock()) { 8625edd361497f4c78a20fcbb75c6e7e94ff8046ed1Dan Gohman LowerArguments(LLVMBB); 863f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman 86433134c4a75558288d663267c8991f6bd37a530afDan Gohman // If any of the arguments has the byval attribute, forgo 86533134c4a75558288d663267c8991f6bd37a530afDan Gohman // fast-isel in the entry block. 866a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (FastIS) { 86733134c4a75558288d663267c8991f6bd37a530afDan Gohman unsigned j = 1; 86833134c4a75558288d663267c8991f6bd37a530afDan Gohman for (Function::arg_iterator I = Fn.arg_begin(), E = Fn.arg_end(); 86933134c4a75558288d663267c8991f6bd37a530afDan Gohman I != E; ++I, ++j) 8700598866c052147c31b808391f58434ce3dbfb838Devang Patel if (Fn.paramHasAttr(j, Attribute::ByVal)) { 87177ca41e5c3f99ee8962b21a7d90bb251a594a65eDan Gohman if (EnableFastISelVerbose || EnableFastISelAbort) 8721a053236f165ac60ee88edca370a732d278aa2c1David Greene dbgs() << "FastISel skips entry block due to byval argument\n"; 87333134c4a75558288d663267c8991f6bd37a530afDan Gohman SuppressFastISel = true; 87433134c4a75558288d663267c8991f6bd37a530afDan Gohman break; 87533134c4a75558288d663267c8991f6bd37a530afDan Gohman } 87633134c4a75558288d663267c8991f6bd37a530afDan Gohman } 87733134c4a75558288d663267c8991f6bd37a530afDan Gohman } 87833134c4a75558288d663267c8991f6bd37a530afDan Gohman 879dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman if (MMI && BB->isLandingPad()) { 880dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // Add a label to mark the beginning of the landing pad. Deletion of the 881dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // landing pad can thus be detected via the MachineModuleInfo. 882dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman unsigned LabelID = MMI->addLandingPad(BB); 883dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman 884518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner const TargetInstrDesc &II = TII.get(TargetOpcode::EH_LABEL); 8852048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman BuildMI(BB, SDB->getCurDebugLoc(), II).addImm(LabelID); 886dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman 887dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // Mark exception register as live in. 888dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman unsigned Reg = TLI.getExceptionAddressRegister(); 889dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman if (Reg) BB->addLiveIn(Reg); 890dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman 891dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // Mark exception selector register as live in. 892dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman Reg = TLI.getExceptionSelectorRegister(); 893dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman if (Reg) BB->addLiveIn(Reg); 894dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman 895dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // FIXME: Hack around an exception handling flaw (PR1508): the personality 896dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // function and list of typeids logically belong to the invoke (or, if you 897dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // like, the basic block containing the invoke), and need to be associated 898dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // with it in the dwarf exception handling tables. Currently however the 899dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // information is provided by an intrinsic (eh.selector) that can be moved 900dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // to unexpected places by the optimizers: if the unwind edge is critical, 901dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // then breaking it can result in the intrinsics being in the successor of 902f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach // the landing pad, not the landing pad itself. This results 903f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach // in exceptions not being caught because no typeids are associated with 904f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach // the invoke. This may not be the only way things can go wrong, but it 905f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach // is the only way we try to work around for the moment. 906dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman BranchInst *Br = dyn_cast<BranchInst>(LLVMBB->getTerminator()); 907dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman 908dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman if (Br && Br->isUnconditional()) { // Critical edge? 909dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman BasicBlock::iterator I, E; 910dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman for (I = LLVMBB->begin(), E = --LLVMBB->end(); I != E; ++I) 911dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman if (isa<EHSelectorInst>(I)) 912dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman break; 913dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman 914dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman if (I == E) 915dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman // No catch info found - try to extract some from the successor. 9165fca8b1c8dc0b9efb0a9822222a6505d1eea6bddDan Gohman CopyCatchInfo(Br->getSuccessor(0), LLVMBB, MMI, *FuncInfo); 917dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman } 918dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman } 919dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman 920f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman // Before doing SelectionDAG ISel, see if FastISel has been requested. 921dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman if (FastIS && !SuppressFastISel) { 922a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // Emit code for any incoming arguments. This must happen before 923a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // beginning FastISel on the entry block. 924a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (LLVMBB == &Fn.getEntryBlock()) { 9252048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman CurDAG->setRoot(SDB->getControlRoot()); 926a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman CodeGenAndEmitDAG(); 9272048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->clear(); 928a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman } 929241f464d24a6c22721607841069bbeb17b3f71e6Dan Gohman FastIS->startNewBlock(BB); 930a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // Do FastISel on as many instructions as possible. 931a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman for (; BI != End; ++BI) { 932a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // Just before the terminator instruction, insert instructions to 933a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // feed PHI nodes in successor blocks. 934a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (isa<TerminatorInst>(BI)) 935a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (!HandlePHINodesInSuccessorBlocksFast(LLVMBB, FastIS)) { 936c19ae9d91d30bc008e0be5f5d4727f333199f64cChris Lattner ++NumFastIselFailures; 93707f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman ResetDebugLoc(SDB, FastIS); 93877ca41e5c3f99ee8962b21a7d90bb251a594a65eDan Gohman if (EnableFastISelVerbose || EnableFastISelAbort) { 9391a053236f165ac60ee88edca370a732d278aa2c1David Greene dbgs() << "FastISel miss: "; 94077ca41e5c3f99ee8962b21a7d90bb251a594a65eDan Gohman BI->dump(); 94177ca41e5c3f99ee8962b21a7d90bb251a594a65eDan Gohman } 942a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar assert(!EnableFastISelAbort && 943f36892335b4919b9120e48a792e6b3630b9de978Torok Edwin "FastISel didn't handle a PHI in a successor"); 944a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman break; 945a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman } 94633134c4a75558288d663267c8991f6bd37a530afDan Gohman 9473990b121cf4a0b280ed3e54cf13870cbf4259e78Chris Lattner SetDebugLoc(MDDbgKind, BI, SDB, FastIS, &MF); 948381ca5572e3c37824e1c5be0fa02f7b5bdd4a1ceDan Gohman 94921c14e3649b3e2a70ac36ebb148f17648f10a2a9Dan Gohman // Try to select the instruction with FastISel. 95007f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman if (FastIS->SelectInstruction(BI)) { 95107f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman ResetDebugLoc(SDB, FastIS); 952a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman continue; 95307f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman } 954a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman 95507f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman // Clear out the debug location so that it doesn't carry over to 95607f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman // unrelated instructions. 95707f111e7b746747cade8371eeaf8c613058cb3a0Dan Gohman ResetDebugLoc(SDB, FastIS); 958f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman 959a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // Then handle certain instructions as single-LLVM-Instruction blocks. 960a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (isa<CallInst>(BI)) { 961c19ae9d91d30bc008e0be5f5d4727f333199f64cChris Lattner ++NumFastIselFailures; 962a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (EnableFastISelVerbose || EnableFastISelAbort) { 9631a053236f165ac60ee88edca370a732d278aa2c1David Greene dbgs() << "FastISel missed call: "; 964a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman BI->dump(); 965f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman } 966f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman 967f012705c7e4ca8cf90b6b734ce1d5355daca5ba5Benjamin Kramer if (!BI->getType()->isVoidTy()) { 968a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman unsigned &R = FuncInfo->ValueMap[BI]; 969a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (!R) 970a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman R = FuncInfo->CreateRegForValue(BI); 971f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman } 972a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman 973b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman bool HadTailCall = false; 9747896c9f436a4eda5ec15e882a7505ba482a2fcd0Chris Lattner SelectBasicBlock(LLVMBB, BI, llvm::next(BI), HadTailCall); 975b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman 976b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman // If the call was emitted as a tail call, we're done with the block. 977b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman if (HadTailCall) { 978b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman BI = End; 979b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman break; 980b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman } 981b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman 982241f464d24a6c22721607841069bbeb17b3f71e6Dan Gohman // If the instruction was codegen'd with multiple blocks, 983241f464d24a6c22721607841069bbeb17b3f71e6Dan Gohman // inform the FastISel object where to resume inserting. 984241f464d24a6c22721607841069bbeb17b3f71e6Dan Gohman FastIS->setCurrentBlock(BB); 985a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman continue; 986f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman } 987a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman 988a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // Otherwise, give up on FastISel for the rest of the block. 989a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // For now, be a little lenient about non-branch terminators. 990a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (!isa<TerminatorInst>(BI) || isa<BranchInst>(BI)) { 991c19ae9d91d30bc008e0be5f5d4727f333199f64cChris Lattner ++NumFastIselFailures; 992a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (EnableFastISelVerbose || EnableFastISelAbort) { 9931a053236f165ac60ee88edca370a732d278aa2c1David Greene dbgs() << "FastISel miss: "; 994a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman BI->dump(); 995a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman } 996a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman if (EnableFastISelAbort) 997a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // The "fast" selector couldn't handle something and bailed. 998a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman // For the purpose of debugging, just abort. 999c23197a26f34f559ea9797de51e187087c039c42Torok Edwin llvm_unreachable("FastISel didn't select the entire block"); 1000a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman } 1001a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman break; 1002f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman } 1003f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman } 1004f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman 1005d2ff647964ed242e67ac12f7d21a58c864309d95Dan Gohman // Run SelectionDAG instruction selection on the remainder of the block 1006d2ff647964ed242e67ac12f7d21a58c864309d95Dan Gohman // not handled by FastISel. If FastISel is not run, this is the entire 10073df24e667f04a7003342b534310919abc9c87418Dan Gohman // block. 1008390f3ace34855a3d4c9e0adf468976375f8c6dc1Devang Patel if (BI != End) { 1009b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman bool HadTailCall; 1010b4afb137efbc38462707bab9f5e8bc5c2d07cd2dDan Gohman SelectBasicBlock(LLVMBB, BI, End, HadTailCall); 1011390f3ace34855a3d4c9e0adf468976375f8c6dc1Devang Patel } 1012381cb07544a2bc119e39969d7d508a6247773e1cEvan Cheng 10137c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman FinishBasicBlock(); 101439fd6e81b1b0de8b820155dc6a0dae226c109de6Evan Cheng } 1015a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman 1016a43abd102f123f6d3bd9ad92045f8119e3fb6153Dan Gohman delete FastIS; 10170e5f1306b059b62d7725f324e087efbc8e7a782dDan Gohman} 10180e5f1306b059b62d7725f324e087efbc8e7a782dDan Gohman 1019fed90b6d097d50881afb45e4d79f430db66dd741Dan Gohmanvoid 10207c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan GohmanSelectionDAGISel::FinishBasicBlock() { 10211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10221a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Target-post-processed machine code:\n"); 1023f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman DEBUG(BB->dump()); 10244198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov 10251a053236f165ac60ee88edca370a732d278aa2c1David Greene DEBUG(dbgs() << "Total amount of phi nodes to update: " 10262048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman << SDB->PHINodesToUpdate.size() << "\n"); 10272048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman DEBUG(for (unsigned i = 0, e = SDB->PHINodesToUpdate.size(); i != e; ++i) 10281a053236f165ac60ee88edca370a732d278aa2c1David Greene dbgs() << "Node " << i << " : (" 10292048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman << SDB->PHINodesToUpdate[i].first 10302048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman << ", " << SDB->PHINodesToUpdate[i].second << ")\n"); 1031a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1032a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Next, now that we know what the last MBB the LLVM BB expanded is, update 10331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // PHI nodes in successors. 10342048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman if (SDB->SwitchCases.empty() && 10352048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->JTCases.empty() && 10362048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->BitTestCases.empty()) { 10372048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (unsigned i = 0, e = SDB->PHINodesToUpdate.size(); i != e; ++i) { 10382048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman MachineInstr *PHI = SDB->PHINodesToUpdate[i].first; 1039518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner assert(PHI->isPHI() && 1040f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman "This is not a machine PHI node that we are updating!"); 10412048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman PHI->addOperand(MachineOperand::CreateReg(SDB->PHINodesToUpdate[i].second, 10429ce2e9d5a07cb3e0176cb32838231243829d67c5Chris Lattner false)); 10439ce2e9d5a07cb3e0176cb32838231243829d67c5Chris Lattner PHI->addOperand(MachineOperand::CreateMBB(BB)); 1044f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman } 10452048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->PHINodesToUpdate.clear(); 1046f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman return; 10471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 10484198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov 10492048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (unsigned i = 0, e = SDB->BitTestCases.size(); i != e; ++i) { 10504198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // Lower header first, if it wasn't already lowered 10512048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman if (!SDB->BitTestCases[i].Emitted) { 10524198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // Set the current basic block to the mbb we wish to insert the code into 10532048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman BB = SDB->BitTestCases[i].Parent; 10542048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->setCurrentBasicBlock(BB); 10554198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // Emit the code 10562048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->visitBitTestHeader(SDB->BitTestCases[i]); 10572048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman CurDAG->setRoot(SDB->getRoot()); 1058f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman CodeGenAndEmitDAG(); 10592048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->clear(); 1060a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar } 10614198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov 10622048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (unsigned j = 0, ej = SDB->BitTestCases[i].Cases.size(); j != ej; ++j) { 10634198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // Set the current basic block to the mbb we wish to insert the code into 10642048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman BB = SDB->BitTestCases[i].Cases[j].ThisBB; 10652048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->setCurrentBasicBlock(BB); 10664198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // Emit the code 10674198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov if (j+1 != ej) 10682048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->visitBitTestCase(SDB->BitTestCases[i].Cases[j+1].ThisBB, 10692048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->BitTestCases[i].Reg, 10702048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->BitTestCases[i].Cases[j]); 10714198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov else 10722048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->visitBitTestCase(SDB->BitTestCases[i].Default, 10732048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->BitTestCases[i].Reg, 10742048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->BitTestCases[i].Cases[j]); 1075a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1076a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 10772048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman CurDAG->setRoot(SDB->getRoot()); 1078f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman CodeGenAndEmitDAG(); 10792048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->clear(); 10804198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov } 10814198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov 10824198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // Update PHI Nodes 10832048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (unsigned pi = 0, pe = SDB->PHINodesToUpdate.size(); pi != pe; ++pi) { 10842048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman MachineInstr *PHI = SDB->PHINodesToUpdate[pi].first; 10854198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov MachineBasicBlock *PHIBB = PHI->getParent(); 1086518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner assert(PHI->isPHI() && 10874198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov "This is not a machine PHI node that we are updating!"); 10884198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // This is "default" BB. We have two jumps to it. From "header" BB and 10894198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // from last "case" BB. 10902048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman if (PHIBB == SDB->BitTestCases[i].Default) { 1091f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach PHI->addOperand(MachineOperand:: 1092f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach CreateReg(SDB->PHINodesToUpdate[pi].second, false)); 10932048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman PHI->addOperand(MachineOperand::CreateMBB(SDB->BitTestCases[i].Parent)); 1094f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach PHI->addOperand(MachineOperand:: 1095f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach CreateReg(SDB->PHINodesToUpdate[pi].second, false)); 10962048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman PHI->addOperand(MachineOperand::CreateMBB(SDB->BitTestCases[i].Cases. 10979ce2e9d5a07cb3e0176cb32838231243829d67c5Chris Lattner back().ThisBB)); 10984198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov } 10994198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // One of "cases" BB. 11002048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (unsigned j = 0, ej = SDB->BitTestCases[i].Cases.size(); 11017c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman j != ej; ++j) { 11022048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman MachineBasicBlock* cBB = SDB->BitTestCases[i].Cases[j].ThisBB; 1103dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen if (cBB->isSuccessor(PHIBB)) { 1104f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach PHI->addOperand(MachineOperand:: 1105f4549b02a7d9907d06e7fb8afefd129452d1f7c5Jim Grosbach CreateReg(SDB->PHINodesToUpdate[pi].second, false)); 11069ce2e9d5a07cb3e0176cb32838231243829d67c5Chris Lattner PHI->addOperand(MachineOperand::CreateMBB(cBB)); 11074198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov } 11084198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov } 11094198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov } 11104198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov } 11112048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->BitTestCases.clear(); 11124198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov 11139453eea49bca1c3904047db495855c93e001d1cdNate Begeman // If the JumpTable record is filled in, then we need to emit a jump table. 11149453eea49bca1c3904047db495855c93e001d1cdNate Begeman // Updating the PHI nodes is tricky in this case, since we need to determine 11159453eea49bca1c3904047db495855c93e001d1cdNate Begeman // whether the PHI is a successor of the range check MBB or the jump table MBB 11162048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (unsigned i = 0, e = SDB->JTCases.size(); i != e; ++i) { 11173a84b9baf67c938454840d10d9e53269c755cd3eAnton Korobeynikov // Lower header first, if it wasn't already lowered 11182048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman if (!SDB->JTCases[i].first.Emitted) { 11193a84b9baf67c938454840d10d9e53269c755cd3eAnton Korobeynikov // Set the current basic block to the mbb we wish to insert the code into 11202048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman BB = SDB->JTCases[i].first.HeaderBB; 11212048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->setCurrentBasicBlock(BB); 11223a84b9baf67c938454840d10d9e53269c755cd3eAnton Korobeynikov // Emit the code 11232048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->visitJumpTableHeader(SDB->JTCases[i].second, SDB->JTCases[i].first); 11242048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman CurDAG->setRoot(SDB->getRoot()); 1125f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman CodeGenAndEmitDAG(); 11262048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->clear(); 11274198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov } 1128a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 112937efe6764568a3829fee26aba532283131d1a104Nate Begeman // Set the current basic block to the mbb we wish to insert the code into 11302048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman BB = SDB->JTCases[i].second.MBB; 11312048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->setCurrentBasicBlock(BB); 113237efe6764568a3829fee26aba532283131d1a104Nate Begeman // Emit the code 11332048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->visitJumpTable(SDB->JTCases[i].second); 11342048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman CurDAG->setRoot(SDB->getRoot()); 1135f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman CodeGenAndEmitDAG(); 11362048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->clear(); 1137a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 113837efe6764568a3829fee26aba532283131d1a104Nate Begeman // Update PHI Nodes 11392048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (unsigned pi = 0, pe = SDB->PHINodesToUpdate.size(); pi != pe; ++pi) { 11402048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman MachineInstr *PHI = SDB->PHINodesToUpdate[pi].first; 114137efe6764568a3829fee26aba532283131d1a104Nate Begeman MachineBasicBlock *PHIBB = PHI->getParent(); 1142518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner assert(PHI->isPHI() && 114337efe6764568a3829fee26aba532283131d1a104Nate Begeman "This is not a machine PHI node that we are updating!"); 11444198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // "default" BB. We can go there only from header BB. 11452048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman if (PHIBB == SDB->JTCases[i].second.Default) { 1146ce31910eae5bd4896fa6c27798e7b26885691d3bEvan Cheng PHI->addOperand 11472048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman (MachineOperand::CreateReg(SDB->PHINodesToUpdate[pi].second, false)); 1148ce31910eae5bd4896fa6c27798e7b26885691d3bEvan Cheng PHI->addOperand 11492048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman (MachineOperand::CreateMBB(SDB->JTCases[i].first.HeaderBB)); 1150f4360a478944af45d5f851a0903fbbfa44f520dcNate Begeman } 11514198c58c716cbe4516ac3a1a407a3cd52548bc3bAnton Korobeynikov // JT BB. Just iterate over successors here 1152dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen if (BB->isSuccessor(PHIBB)) { 1153ce31910eae5bd4896fa6c27798e7b26885691d3bEvan Cheng PHI->addOperand 11542048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman (MachineOperand::CreateReg(SDB->PHINodesToUpdate[pi].second, false)); 11559ce2e9d5a07cb3e0176cb32838231243829d67c5Chris Lattner PHI->addOperand(MachineOperand::CreateMBB(BB)); 115637efe6764568a3829fee26aba532283131d1a104Nate Begeman } 115737efe6764568a3829fee26aba532283131d1a104Nate Begeman } 115837efe6764568a3829fee26aba532283131d1a104Nate Begeman } 11592048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->JTCases.clear(); 1160a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1161b2e806eecd85c98367f038817e742ef183dd9f87Chris Lattner // If the switch block involved a branch to one of the actual successors, we 1162b2e806eecd85c98367f038817e742ef183dd9f87Chris Lattner // need to update PHI nodes in that block. 11632048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (unsigned i = 0, e = SDB->PHINodesToUpdate.size(); i != e; ++i) { 11642048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman MachineInstr *PHI = SDB->PHINodesToUpdate[i].first; 1165518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner assert(PHI->isPHI() && 1166b2e806eecd85c98367f038817e742ef183dd9f87Chris Lattner "This is not a machine PHI node that we are updating!"); 1167b2e806eecd85c98367f038817e742ef183dd9f87Chris Lattner if (BB->isSuccessor(PHI->getParent())) { 11682048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman PHI->addOperand(MachineOperand::CreateReg(SDB->PHINodesToUpdate[i].second, 11699ce2e9d5a07cb3e0176cb32838231243829d67c5Chris Lattner false)); 11709ce2e9d5a07cb3e0176cb32838231243829d67c5Chris Lattner PHI->addOperand(MachineOperand::CreateMBB(BB)); 1171b2e806eecd85c98367f038817e742ef183dd9f87Chris Lattner } 1172b2e806eecd85c98367f038817e742ef183dd9f87Chris Lattner } 1173a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1174f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman // If we generated any switch lowering information, build and codegen any 1175f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman // additional DAGs necessary. 11762048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman for (unsigned i = 0, e = SDB->SwitchCases.size(); i != e; ++i) { 1177f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman // Set the current basic block to the mbb we wish to insert the code into 11782048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman MachineBasicBlock *ThisBB = BB = SDB->SwitchCases[i].ThisBB; 11792048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->setCurrentBasicBlock(BB); 1180a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1181f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman // Emit the code 11822048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->visitSwitchCase(SDB->SwitchCases[i]); 11832048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman CurDAG->setRoot(SDB->getRoot()); 1184f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman CodeGenAndEmitDAG(); 1185a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1186d5e93c07957844e3086fb12d686b93dbbd2524c2Chris Lattner // Handle any PHI nodes in successors of this chunk, as if we were coming 1187d5e93c07957844e3086fb12d686b93dbbd2524c2Chris Lattner // from the original BB before switch expansion. Note that PHI nodes can 1188d5e93c07957844e3086fb12d686b93dbbd2524c2Chris Lattner // occur multiple times in PHINodesToUpdate. We have to be very careful to 1189d5e93c07957844e3086fb12d686b93dbbd2524c2Chris Lattner // handle them the right number of times. 11902048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman while ((BB = SDB->SwitchCases[i].TrueBB)) { // Handle LHS and RHS. 1191fb2e752e4175920d0531f2afc93a23d0cdf4db14Evan Cheng // If new BB's are created during scheduling, the edges may have been 1192ce31910eae5bd4896fa6c27798e7b26885691d3bEvan Cheng // updated. That is, the edge from ThisBB to BB may have been split and 1193ce31910eae5bd4896fa6c27798e7b26885691d3bEvan Cheng // BB's predecessor is now another block. 1194fb2e752e4175920d0531f2afc93a23d0cdf4db14Evan Cheng DenseMap<MachineBasicBlock*, MachineBasicBlock*>::iterator EI = 11952048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->EdgeMapping.find(BB); 11962048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman if (EI != SDB->EdgeMapping.end()) 1197fb2e752e4175920d0531f2afc93a23d0cdf4db14Evan Cheng ThisBB = EI->second; 1198dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen 1199dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen // BB may have been removed from the CFG if a branch was constant folded. 1200dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen if (ThisBB->isSuccessor(BB)) { 1201dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen for (MachineBasicBlock::iterator Phi = BB->begin(); 1202518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner Phi != BB->end() && Phi->isPHI(); 1203dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen ++Phi) { 1204dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen // This value for this PHI node is recorded in PHINodesToUpdate. 1205dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen for (unsigned pn = 0; ; ++pn) { 1206dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen assert(pn != SDB->PHINodesToUpdate.size() && 1207dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen "Didn't find PHI entry!"); 1208dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen if (SDB->PHINodesToUpdate[pn].first == Phi) { 1209dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen Phi->addOperand(MachineOperand:: 1210dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen CreateReg(SDB->PHINodesToUpdate[pn].second, 1211dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen false)); 1212dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen Phi->addOperand(MachineOperand::CreateMBB(ThisBB)); 1213dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen break; 1214dd437ba15e00d1a137e0c6e3ca1ff213ed6a2aa0Jakob Stoklund Olesen } 12158be58a11868ae081c195c107cd39a07f1f523877Evan Cheng } 1216d5e93c07957844e3086fb12d686b93dbbd2524c2Chris Lattner } 1217f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman } 1218a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1219d5e93c07957844e3086fb12d686b93dbbd2524c2Chris Lattner // Don't process RHS if same block as LHS. 12202048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman if (BB == SDB->SwitchCases[i].FalseBB) 12212048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->SwitchCases[i].FalseBB = 0; 1222a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1223d5e93c07957844e3086fb12d686b93dbbd2524c2Chris Lattner // If we haven't handled the RHS, do so now. Otherwise, we're done. 12242048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->SwitchCases[i].TrueBB = SDB->SwitchCases[i].FalseBB; 12252048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->SwitchCases[i].FalseBB = 0; 1226f15485a8d0dff5f720b7ad27346129ac5c3ec503Nate Begeman } 12272048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman assert(SDB->SwitchCases[i].TrueBB == 0 && SDB->SwitchCases[i].FalseBB == 0); 12282048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->clear(); 1229a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner } 12302048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->SwitchCases.clear(); 12317c3234c6be0dc0bdf4b5d6f848cd728a77f349d7Dan Gohman 12322048b85c7c2c987874b9423e682ec8e60b60574bDan Gohman SDB->PHINodesToUpdate.clear(); 12331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1234a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng 123513ec702c430b91ee49b9e6d9581cd95412f216c8Jim Laskey 12360a3776dc6f702d4e3f4a189df7f43d8f99957773Dan Gohman/// Create the scheduler. If a specific scheduler was specified 12370a3776dc6f702d4e3f4a189df7f43d8f99957773Dan Gohman/// via the SchedulerRegistry, use it, otherwise select the 12380a3776dc6f702d4e3f4a189df7f43d8f99957773Dan Gohman/// one preferred by the target. 12395e84368b26415b3bb7f3f8d9cff3e05938dd82d0Dan Gohman/// 124047ac0f0c7c39289f5970688154e385be22b7f293Dan GohmanScheduleDAGSDNodes *SelectionDAGISel::CreateScheduler() { 1241eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey RegisterScheduler::FunctionPassCtor Ctor = RegisterScheduler::getDefault(); 1242a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 124313ec702c430b91ee49b9e6d9581cd95412f216c8Jim Laskey if (!Ctor) { 1244eb577ba3b815a1fa4627b060dd2345d17abf672dJim Laskey Ctor = ISHeuristic; 12459373beba6010dd34316a801c3a9b37ab9e048031Jim Laskey RegisterScheduler::setDefault(Ctor); 12464ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng } 1247a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1248be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2bBill Wendling return Ctor(this, OptLevel); 1249a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng} 12500e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 1251fc54c552963545a81e4ea38e60460590afb2d5aeDan GohmanScheduleHazardRecognizer *SelectionDAGISel::CreateTargetHazardRecognizer() { 1252fc54c552963545a81e4ea38e60460590afb2d5aeDan Gohman return new ScheduleHazardRecognizer(); 12539ff542f2cce5bf7bf3cf9f692cf3ec0690ad2b3bJim Laskey} 12549ff542f2cce5bf7bf3cf9f692cf3ec0690ad2b3bJim Laskey 1255755480681c795d585c73556c028b6143c46bda86Chris Lattner//===----------------------------------------------------------------------===// 1256755480681c795d585c73556c028b6143c46bda86Chris Lattner// Helper functions used by the generated instruction selector. 1257755480681c795d585c73556c028b6143c46bda86Chris Lattner//===----------------------------------------------------------------------===// 1258755480681c795d585c73556c028b6143c46bda86Chris Lattner// Calls to these methods are generated by tblgen. 1259755480681c795d585c73556c028b6143c46bda86Chris Lattner 1260755480681c795d585c73556c028b6143c46bda86Chris Lattner/// CheckAndMask - The isel is trying to match something like (and X, 255). If 1261755480681c795d585c73556c028b6143c46bda86Chris Lattner/// the dag combiner simplified the 255, we still want to match. RHS is the 1262755480681c795d585c73556c028b6143c46bda86Chris Lattner/// actual value in the DAG on the RHS of an AND, and DesiredMaskS is the value 1263755480681c795d585c73556c028b6143c46bda86Chris Lattner/// specified in the .td file (e.g. 255). 1264a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbarbool SelectionDAGISel::CheckAndMask(SDValue LHS, ConstantSDNode *RHS, 1265dc9b3d0bb5ed3a3f59cad61e264f0ec43c946459Dan Gohman int64_t DesiredMaskS) const { 12662e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman const APInt &ActualMask = RHS->getAPIntValue(); 12672e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman const APInt &DesiredMask = APInt(LHS.getValueSizeInBits(), DesiredMaskS); 1268a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1269755480681c795d585c73556c028b6143c46bda86Chris Lattner // If the actual mask exactly matches, success! 1270755480681c795d585c73556c028b6143c46bda86Chris Lattner if (ActualMask == DesiredMask) 1271755480681c795d585c73556c028b6143c46bda86Chris Lattner return true; 1272a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1273755480681c795d585c73556c028b6143c46bda86Chris Lattner // If the actual AND mask is allowing unallowed bits, this doesn't match. 12742e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman if (ActualMask.intersects(~DesiredMask)) 1275755480681c795d585c73556c028b6143c46bda86Chris Lattner return false; 1276a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1277755480681c795d585c73556c028b6143c46bda86Chris Lattner // Otherwise, the DAG Combiner may have proven that the value coming in is 1278755480681c795d585c73556c028b6143c46bda86Chris Lattner // either already zero or is not demanded. Check for known zero input bits. 12792e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman APInt NeededMask = DesiredMask & ~ActualMask; 1280ea859be53ca13a1547c4675549946b74dc3c6f41Dan Gohman if (CurDAG->MaskedValueIsZero(LHS, NeededMask)) 1281755480681c795d585c73556c028b6143c46bda86Chris Lattner return true; 1282a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1283755480681c795d585c73556c028b6143c46bda86Chris Lattner // TODO: check to see if missing bits are just not demanded. 1284755480681c795d585c73556c028b6143c46bda86Chris Lattner 1285755480681c795d585c73556c028b6143c46bda86Chris Lattner // Otherwise, this pattern doesn't match. 1286755480681c795d585c73556c028b6143c46bda86Chris Lattner return false; 1287755480681c795d585c73556c028b6143c46bda86Chris Lattner} 1288755480681c795d585c73556c028b6143c46bda86Chris Lattner 1289755480681c795d585c73556c028b6143c46bda86Chris Lattner/// CheckOrMask - The isel is trying to match something like (or X, 255). If 1290755480681c795d585c73556c028b6143c46bda86Chris Lattner/// the dag combiner simplified the 255, we still want to match. RHS is the 1291755480681c795d585c73556c028b6143c46bda86Chris Lattner/// actual value in the DAG on the RHS of an OR, and DesiredMaskS is the value 1292755480681c795d585c73556c028b6143c46bda86Chris Lattner/// specified in the .td file (e.g. 255). 1293a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbarbool SelectionDAGISel::CheckOrMask(SDValue LHS, ConstantSDNode *RHS, 12942e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman int64_t DesiredMaskS) const { 12952e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman const APInt &ActualMask = RHS->getAPIntValue(); 12962e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman const APInt &DesiredMask = APInt(LHS.getValueSizeInBits(), DesiredMaskS); 1297a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1298755480681c795d585c73556c028b6143c46bda86Chris Lattner // If the actual mask exactly matches, success! 1299755480681c795d585c73556c028b6143c46bda86Chris Lattner if (ActualMask == DesiredMask) 1300755480681c795d585c73556c028b6143c46bda86Chris Lattner return true; 1301a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1302755480681c795d585c73556c028b6143c46bda86Chris Lattner // If the actual AND mask is allowing unallowed bits, this doesn't match. 13032e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman if (ActualMask.intersects(~DesiredMask)) 1304755480681c795d585c73556c028b6143c46bda86Chris Lattner return false; 1305a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1306755480681c795d585c73556c028b6143c46bda86Chris Lattner // Otherwise, the DAG Combiner may have proven that the value coming in is 1307755480681c795d585c73556c028b6143c46bda86Chris Lattner // either already zero or is not demanded. Check for known zero input bits. 13082e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman APInt NeededMask = DesiredMask & ~ActualMask; 1309a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 13102e68b6f52d0979575b2f02ed29717d907ba0684cDan Gohman APInt KnownZero, KnownOne; 1311ea859be53ca13a1547c4675549946b74dc3c6f41Dan Gohman CurDAG->ComputeMaskedBits(LHS, NeededMask, KnownZero, KnownOne); 1312a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1313755480681c795d585c73556c028b6143c46bda86Chris Lattner // If all the missing bits in the or are already known to be set, match! 1314755480681c795d585c73556c028b6143c46bda86Chris Lattner if ((NeededMask & KnownOne) == NeededMask) 1315755480681c795d585c73556c028b6143c46bda86Chris Lattner return true; 1316a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1317755480681c795d585c73556c028b6143c46bda86Chris Lattner // TODO: check to see if missing bits are just not demanded. 1318a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 1319755480681c795d585c73556c028b6143c46bda86Chris Lattner // Otherwise, this pattern doesn't match. 1320755480681c795d585c73556c028b6143c46bda86Chris Lattner return false; 1321755480681c795d585c73556c028b6143c46bda86Chris Lattner} 1322755480681c795d585c73556c028b6143c46bda86Chris Lattner 13239ff542f2cce5bf7bf3cf9f692cf3ec0690ad2b3bJim Laskey 13240e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner/// SelectInlineAsmMemoryOperands - Calls to this are automatically generated 13250e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner/// by tblgen. Others should not call it. 13260e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattnervoid SelectionDAGISel:: 1327f350b277f32d7d47f86c0e54f4aec4d470500618Dan GohmanSelectInlineAsmMemoryOperands(std::vector<SDValue> &Ops) { 1328475871a144eb604ddaf37503397ba0941442e5fbDan Gohman std::vector<SDValue> InOps; 13290e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner std::swap(InOps, Ops); 13300e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 13310e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(InOps[0]); // input chain. 13320e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(InOps[1]); // input asm string. 13330e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner 13340e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner unsigned i = 2, e = InOps.size(); 1335825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (InOps[e-1].getValueType() == MVT::Flag) 13360e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner --e; // Don't process a flag operand if it is here. 1337a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 13380e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner while (i != e) { 1339f5aeb1a8e4cf272c7348376d185ef8d8267653e0Dan Gohman unsigned Flags = cast<ConstantSDNode>(InOps[i])->getZExtValue(); 134086b49f8e2de796cb46c7c8b6a4c4900533fd53f4Dale Johannesen if ((Flags & 7) != 4 /*MEM*/) { 13410e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Just skip over this operand, copying the operands verbatim. 1342697cbbfb00c318f98d6eb51945f077e2bfe8781eEvan Cheng Ops.insert(Ops.end(), InOps.begin()+i, 1343697cbbfb00c318f98d6eb51945f077e2bfe8781eEvan Cheng InOps.begin()+i+InlineAsm::getNumOperandRegisters(Flags) + 1); 1344697cbbfb00c318f98d6eb51945f077e2bfe8781eEvan Cheng i += InlineAsm::getNumOperandRegisters(Flags) + 1; 13450e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } else { 1346697cbbfb00c318f98d6eb51945f077e2bfe8781eEvan Cheng assert(InlineAsm::getNumOperandRegisters(Flags) == 1 && 1347697cbbfb00c318f98d6eb51945f077e2bfe8781eEvan Cheng "Memory operand with multiple values?"); 13480e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Otherwise, this is a memory operand. Ask the target to select it. 1349475871a144eb604ddaf37503397ba0941442e5fbDan Gohman std::vector<SDValue> SelOps; 1350f350b277f32d7d47f86c0e54f4aec4d470500618Dan Gohman if (SelectInlineAsmMemoryOperand(InOps[i+1], 'm', SelOps)) { 13517d696d80409aad20bb5da0fc4eccab941dd371d4Torok Edwin llvm_report_error("Could not match memory address. Inline asm" 13527d696d80409aad20bb5da0fc4eccab941dd371d4Torok Edwin " failure!"); 13530e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } 1354a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 13550e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Add this to the output node. 135686b49f8e2de796cb46c7c8b6a4c4900533fd53f4Dale Johannesen Ops.push_back(CurDAG->getTargetConstant(4/*MEM*/ | (SelOps.size()<< 3), 13579949933d6eb406bc74f7df7a0180a11c050a236fDale Johannesen MVT::i32)); 13580e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.insert(Ops.end(), SelOps.begin(), SelOps.end()); 13590e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner i += 2; 13600e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } 13610e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner } 1362a279bc3da55691784064cb47200a1c584408b8abDaniel Dunbar 13630e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner // Add the flag input back if present. 13640e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner if (e != InOps.size()) 13650e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner Ops.push_back(InOps.back()); 13660e43f2ba114df7bfc1f70d0ef62b663f6ea4c09dChris Lattner} 1367794fd75c67a2cdc128d67342c6d88a504d186896Devang Patel 1368e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson/// findFlagUse - Return use of EVT::Flag value produced by the specified 1369c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov/// SDNode. 1370c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov/// 1371c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikovstatic SDNode *findFlagUse(SDNode *N) { 1372c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov unsigned FlagResNo = N->getNumValues()-1; 1373c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov for (SDNode::use_iterator I = N->use_begin(), E = N->use_end(); I != E; ++I) { 1374c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov SDUse &Use = I.getUse(); 1375c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov if (Use.getResNo() == FlagResNo) 1376c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov return Use.getUser(); 1377c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov } 1378c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov return NULL; 1379c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov} 1380c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov 1381c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov/// findNonImmUse - Return true if "Use" is a non-immediate use of "Def". 1382c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov/// This function recursively traverses up the operand chain, ignoring 1383c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov/// certain nodes. 1384c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikovstatic bool findNonImmUse(SDNode *Use, SDNode* Def, SDNode *ImmedUse, 1385d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner SDNode *Root, SmallPtrSet<SDNode*, 16> &Visited, 1386d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner bool IgnoreChains) { 1387da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // The NodeID's are given uniques ID's where a node ID is guaranteed to be 1388da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // greater than all of its (recursive) operands. If we scan to a point where 1389da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // 'use' is smaller than the node we're scanning for, then we know we will 1390da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // never find it. 1391da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // 1392da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // The Use may be -1 (unassigned) if it is a newly allocated node. This can 1393da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // happen because we scan down to newly selected nodes in the case of flag 1394da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // uses. 1395da244a091dcde022ea4938793d81ee957903ed70Chris Lattner if ((Use->getNodeId() < Def->getNodeId() && Use->getNodeId() != -1)) 1396da244a091dcde022ea4938793d81ee957903ed70Chris Lattner return false; 1397da244a091dcde022ea4938793d81ee957903ed70Chris Lattner 1398da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // Don't revisit nodes if we already scanned it and didn't fail, we know we 1399da244a091dcde022ea4938793d81ee957903ed70Chris Lattner // won't fail if we scan it again. 1400da244a091dcde022ea4938793d81ee957903ed70Chris Lattner if (!Visited.insert(Use)) 1401c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov return false; 1402c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov 1403c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov for (unsigned i = 0, e = Use->getNumOperands(); i != e; ++i) { 1404d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner // Ignore chain uses, they are validated by HandleMergeInputChains. 1405d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner if (Use->getOperand(i).getValueType() == MVT::Other && IgnoreChains) 1406d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner continue; 1407d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner 1408c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov SDNode *N = Use->getOperand(i).getNode(); 1409c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov if (N == Def) { 1410c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov if (Use == ImmedUse || Use == Root) 1411c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov continue; // We are not looking for immediate use. 1412c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov assert(N != Root); 1413c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov return true; 1414c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov } 1415c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov 1416c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // Traverse up the operand chain. 1417d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner if (findNonImmUse(N, Def, ImmedUse, Root, Visited, IgnoreChains)) 1418c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov return true; 1419c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov } 1420c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov return false; 1421c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov} 1422c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov 1423014bf215c3457bb34fee348265e8f63a70b4d503Evan Cheng/// IsProfitableToFold - Returns true if it's profitable to fold the specific 1424014bf215c3457bb34fee348265e8f63a70b4d503Evan Cheng/// operand node N of U during instruction selection that starts at Root. 1425014bf215c3457bb34fee348265e8f63a70b4d503Evan Chengbool SelectionDAGISel::IsProfitableToFold(SDValue N, SDNode *U, 1426014bf215c3457bb34fee348265e8f63a70b4d503Evan Cheng SDNode *Root) const { 1427014bf215c3457bb34fee348265e8f63a70b4d503Evan Cheng if (OptLevel == CodeGenOpt::None) return false; 1428014bf215c3457bb34fee348265e8f63a70b4d503Evan Cheng return N.hasOneUse(); 1429014bf215c3457bb34fee348265e8f63a70b4d503Evan Cheng} 1430014bf215c3457bb34fee348265e8f63a70b4d503Evan Cheng 1431014bf215c3457bb34fee348265e8f63a70b4d503Evan Cheng/// IsLegalToFold - Returns true if the specific operand node N of 1432014bf215c3457bb34fee348265e8f63a70b4d503Evan Cheng/// U can be folded during instruction selection that starts at Root. 1433d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattnerbool SelectionDAGISel::IsLegalToFold(SDValue N, SDNode *U, SDNode *Root, 1434d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner bool IgnoreChains) const { 1435c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov if (OptLevel == CodeGenOpt::None) return false; 1436c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov 1437c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // If Root use can somehow reach N through a path that that doesn't contain 1438c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // U then folding N would create a cycle. e.g. In the following 1439c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // diagram, Root can reach N through X. If N is folded into into Root, then 1440c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // X is both a predecessor and a successor of U. 1441c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // 1442c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // [N*] // 1443c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // ^ ^ // 1444c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // / \ // 1445c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // [U*] [X]? // 1446c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // ^ ^ // 1447c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // \ / // 1448c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // \ / // 1449c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // [Root*] // 1450c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // 1451c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // * indicates nodes to be folded together. 1452c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // 1453c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // If Root produces a flag, then it gets (even more) interesting. Since it 1454c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // will be "glued" together with its flag use in the scheduler, we need to 1455c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // check if it might reach N. 1456c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // 1457c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // [N*] // 1458c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // ^ ^ // 1459c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // / \ // 1460c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // [U*] [X]? // 1461c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // ^ ^ // 1462c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // \ \ // 1463c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // \ | // 1464c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // [Root*] | // 1465c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // ^ | // 1466c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // f | // 1467c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // | / // 1468c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // [Y] / // 1469c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // ^ / // 1470c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // f / // 1471c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // | / // 1472c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // [FU] // 1473c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // 1474c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // If FU (flag use) indirectly reaches N (the load), and Root folds N 1475c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // (call it Fold), then X is a predecessor of FU and a successor of 1476c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // Fold. But since Fold and FU are flagged together, this will create 1477c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov // a cycle in the scheduling graph. 1478c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov 14799bbcd5ee5b9a34f82d7d0570256ff4b4f53fabe9Chris Lattner // If the node has flags, walk down the graph to the "lowest" node in the 14809bbcd5ee5b9a34f82d7d0570256ff4b4f53fabe9Chris Lattner // flagged set. 1481e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT VT = Root->getValueType(Root->getNumValues()-1); 1482825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson while (VT == MVT::Flag) { 1483c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov SDNode *FU = findFlagUse(Root); 1484c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov if (FU == NULL) 1485c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov break; 1486c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov Root = FU; 1487c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov VT = Root->getValueType(Root->getNumValues()-1); 1488c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov } 1489c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov 14909bbcd5ee5b9a34f82d7d0570256ff4b4f53fabe9Chris Lattner SmallPtrSet<SDNode*, 16> Visited; 14919bbcd5ee5b9a34f82d7d0570256ff4b4f53fabe9Chris Lattner return !findNonImmUse(Root, N.getNode(), U, Root, Visited, IgnoreChains); 1492c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov} 1493c1c6ef8f74fc550f29cfec1f2fb699dd8c2fb94eAnton Korobeynikov 1494eeb3a00b84b7767d236ec8cf0619b9217fc247b9Dan GohmanSDNode *SelectionDAGISel::Select_INLINEASM(SDNode *N) { 1495eeb3a00b84b7767d236ec8cf0619b9217fc247b9Dan Gohman std::vector<SDValue> Ops(N->op_begin(), N->op_end()); 1496e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman SelectInlineAsmMemoryOperands(Ops); 1497e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman 1498e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman std::vector<EVT> VTs; 1499e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman VTs.push_back(MVT::Other); 1500e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman VTs.push_back(MVT::Flag); 1501eeb3a00b84b7767d236ec8cf0619b9217fc247b9Dan Gohman SDValue New = CurDAG->getNode(ISD::INLINEASM, N->getDebugLoc(), 1502e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman VTs, &Ops[0], Ops.size()); 1503d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner New->setNodeId(-1); 1504e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman return New.getNode(); 1505e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman} 1506e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman 1507eeb3a00b84b7767d236ec8cf0619b9217fc247b9Dan GohmanSDNode *SelectionDAGISel::Select_UNDEF(SDNode *N) { 1508518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner return CurDAG->SelectNodeTo(N, TargetOpcode::IMPLICIT_DEF,N->getValueType(0)); 1509e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman} 1510e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman 1511eeb3a00b84b7767d236ec8cf0619b9217fc247b9Dan GohmanSDNode *SelectionDAGISel::Select_EH_LABEL(SDNode *N) { 1512eeb3a00b84b7767d236ec8cf0619b9217fc247b9Dan Gohman SDValue Chain = N->getOperand(0); 1513e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman unsigned C = cast<LabelSDNode>(N)->getLabelID(); 1514e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman SDValue Tmp = CurDAG->getTargetConstant(C, MVT::i32); 1515518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner return CurDAG->SelectNodeTo(N, TargetOpcode::EH_LABEL, 1516e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman MVT::Other, Tmp, Chain); 1517e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman} 1518e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman 15192a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner/// GetVBR - decode a vbr encoding whose top bit is set. 15202a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris LattnerALWAYS_INLINE static uint64_t 15212a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris LattnerGetVBR(uint64_t Val, const unsigned char *MatcherTable, unsigned &Idx) { 15222a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(Val >= 128 && "Not a VBR"); 15232a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Val &= 127; // Remove first vbr bit. 15242a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 15252a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned Shift = 7; 15262a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner uint64_t NextBits; 15272a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner do { 152814df8dc680d40173f34d693f9dc451f8a30c907bChris Lattner NextBits = MatcherTable[Idx++]; 15292a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Val |= (NextBits&127) << Shift; 15302a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Shift += 7; 15312a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } while (NextBits & 128); 15322a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 15332a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner return Val; 15342a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner} 15352a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 15362a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 15372a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner/// UpdateChainsAndFlags - When a match is complete, this method updates uses of 15382a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner/// interior flag and chain results to use the new flag and chain results. 153982dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattnervoid SelectionDAGISel:: 154082dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris LattnerUpdateChainsAndFlags(SDNode *NodeToMatch, SDValue InputChain, 154182dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner const SmallVectorImpl<SDNode*> &ChainNodesMatched, 154282dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner SDValue InputFlag, 154382dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner const SmallVectorImpl<SDNode*> &FlagResultNodesMatched, 154482dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner bool isMorphNodeTo) { 154582dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner SmallVector<SDNode*, 4> NowDeadNodes; 154682dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner 154782dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner ISelUpdater ISU(ISelPosition); 154882dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner 15492a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Now that all the normal results are replaced, we replace the chain and 15502a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // flag results if present. 15512a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (!ChainNodesMatched.empty()) { 15522a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(InputChain.getNode() != 0 && 15532a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner "Matched input chains but didn't produce a chain"); 15542a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Loop over all of the nodes we matched that produced a chain result. 15552a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Replace all the chain results with the final chain we ended up with. 15562a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner for (unsigned i = 0, e = ChainNodesMatched.size(); i != e; ++i) { 15572a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDNode *ChainNode = ChainNodesMatched[i]; 15582a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 155982dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner // If this node was already deleted, don't look at it. 156082dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner if (ChainNode->getOpcode() == ISD::DELETED_NODE) 156182dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner continue; 156282dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner 15632a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Don't replace the results of the root node if we're doing a 15642a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // MorphNodeTo. 15652a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (ChainNode == NodeToMatch && isMorphNodeTo) 15662a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 15672a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 15682a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDValue ChainVal = SDValue(ChainNode, ChainNode->getNumValues()-1); 15692a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (ChainVal.getValueType() == MVT::Flag) 15702a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner ChainVal = ChainVal.getValue(ChainVal->getNumValues()-2); 15712a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(ChainVal.getValueType() == MVT::Other && "Not a chain?"); 157282dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner CurDAG->ReplaceAllUsesOfValueWith(ChainVal, InputChain, &ISU); 157382dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner 157482dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner // If the node became dead, delete it. 157582dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner if (ChainNode->use_empty()) 157682dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner NowDeadNodes.push_back(ChainNode); 15772a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 15782a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 15792a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 15802a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If the result produces a flag, update any flag results in the matched 15812a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // pattern with the flag result. 15822a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (InputFlag.getNode() != 0) { 15832a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Handle any interior nodes explicitly marked. 15842a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner for (unsigned i = 0, e = FlagResultNodesMatched.size(); i != e; ++i) { 15852a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDNode *FRN = FlagResultNodesMatched[i]; 158682dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner 158782dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner // If this node was already deleted, don't look at it. 158882dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner if (FRN->getOpcode() == ISD::DELETED_NODE) 158982dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner continue; 159082dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner 15912a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(FRN->getValueType(FRN->getNumValues()-1) == MVT::Flag && 15922a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner "Doesn't have a flag result"); 15932a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner CurDAG->ReplaceAllUsesOfValueWith(SDValue(FRN, FRN->getNumValues()-1), 159482dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner InputFlag, &ISU); 159582dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner 159682dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner // If the node became dead, delete it. 159782dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner if (FRN->use_empty()) 159882dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner NowDeadNodes.push_back(FRN); 15992a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 16002a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 16012a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 160282dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner if (!NowDeadNodes.empty()) 160382dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner CurDAG->RemoveDeadNodes(NowDeadNodes, &ISU); 160482dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner 16052a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner DEBUG(errs() << "ISEL: Match complete!\n"); 16062a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner} 16072a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 1608c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattnerenum ChainResult { 1609c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner CR_Simple, 1610c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner CR_InducesCycle, 1611c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner CR_LeadsToInteriorNode 1612c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner}; 1613c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1614c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// WalkChainUsers - Walk down the users of the specified chained node that is 1615c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// part of the pattern we're matching, looking at all of the users we find. 1616c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// This determines whether something is an interior node, whether we have a 1617c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// non-pattern node in between two pattern nodes (which prevent folding because 1618c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// it would induce a cycle) and whether we have a TokenFactor node sandwiched 1619c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// between pattern nodes (in which case the TF becomes part of the pattern). 1620c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// 1621c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// The walk we do here is guaranteed to be small because we quickly get down to 1622c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// already selected nodes "below" us. 1623c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattnerstatic ChainResult 1624c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris LattnerWalkChainUsers(SDNode *ChainedNode, 1625c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner SmallVectorImpl<SDNode*> &ChainedNodesInPattern, 1626c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner SmallVectorImpl<SDNode*> &InteriorChainedNodes) { 1627c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner ChainResult Result = CR_Simple; 1628c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1629c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner for (SDNode::use_iterator UI = ChainedNode->use_begin(), 1630c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner E = ChainedNode->use_end(); UI != E; ++UI) { 1631c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // Make sure the use is of the chain, not some other value we produce. 1632c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner if (UI.getUse().getValueType() != MVT::Other) continue; 1633c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1634c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner SDNode *User = *UI; 1635c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1636c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // If we see an already-selected machine node, then we've gone beyond the 1637c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // pattern that we're selecting down into the already selected chunk of the 1638c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // DAG. 1639c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner if (User->isMachineOpcode() || 1640c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner User->getOpcode() == ISD::HANDLENODE) // Root of the graph. 1641c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner continue; 1642d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner 1643d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner if (User->getOpcode() == ISD::CopyToReg || 1644d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner User->getOpcode() == ISD::CopyFromReg || 1645d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner User->getOpcode() == ISD::INLINEASM) { 1646d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner // If their node ID got reset to -1 then they've already been selected. 1647d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner // Treat them like a MachineOpcode. 1648d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner if (User->getNodeId() == -1) 1649d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner continue; 1650d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner } 1651c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1652c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // If we have a TokenFactor, we handle it specially. 1653c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner if (User->getOpcode() != ISD::TokenFactor) { 1654c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // If the node isn't a token factor and isn't part of our pattern, then it 1655c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // must be a random chained node in between two nodes we're selecting. 1656c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // This happens when we have something like: 1657c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // x = load ptr 1658c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // call 1659c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // y = x+4 1660c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // store y -> ptr 1661c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // Because we structurally match the load/store as a read/modify/write, 1662c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // but the call is chained between them. We cannot fold in this case 1663c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // because it would induce a cycle in the graph. 1664c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner if (!std::count(ChainedNodesInPattern.begin(), 1665c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner ChainedNodesInPattern.end(), User)) 1666c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner return CR_InducesCycle; 1667c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1668c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // Otherwise we found a node that is part of our pattern. For example in: 1669c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // x = load ptr 1670c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // y = x+4 1671c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // store y -> ptr 1672c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // This would happen when we're scanning down from the load and see the 1673c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // store as a user. Record that there is a use of ChainedNode that is 1674c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // part of the pattern and keep scanning uses. 1675c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner Result = CR_LeadsToInteriorNode; 1676c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner InteriorChainedNodes.push_back(User); 1677c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner continue; 1678c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner } 1679c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1680c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // If we found a TokenFactor, there are two cases to consider: first if the 1681c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // TokenFactor is just hanging "below" the pattern we're matching (i.e. no 1682c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // uses of the TF are in our pattern) we just want to ignore it. Second, 1683c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // the TokenFactor can be sandwiched in between two chained nodes, like so: 1684c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // [Load chain] 1685c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // ^ 1686c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // | 1687c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // [Load] 1688c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // ^ ^ 1689c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // | \ DAG's like cheese 1690c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // / \ do you? 1691c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // / | 1692c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // [TokenFactor] [Op] 1693c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // ^ ^ 1694c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // | | 1695c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // \ / 1696c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // \ / 1697c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // [Store] 1698c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // 1699c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // In this case, the TokenFactor becomes part of our match and we rewrite it 1700c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // as a new TokenFactor. 1701c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // 1702c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // To distinguish these two cases, do a recursive walk down the uses. 1703c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner switch (WalkChainUsers(User, ChainedNodesInPattern, InteriorChainedNodes)) { 1704c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner case CR_Simple: 1705c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // If the uses of the TokenFactor are just already-selected nodes, ignore 1706c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // it, it is "below" our pattern. 1707c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner continue; 1708c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner case CR_InducesCycle: 1709c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // If the uses of the TokenFactor lead to nodes that are not part of our 1710c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // pattern that are not selected, folding would turn this into a cycle, 1711c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // bail out now. 1712c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner return CR_InducesCycle; 1713c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner case CR_LeadsToInteriorNode: 1714c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner break; // Otherwise, keep processing. 1715c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner } 1716c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1717c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // Okay, we know we're in the interesting interior case. The TokenFactor 1718c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // is now going to be considered part of the pattern so that we rewrite its 1719c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // uses (it may have uses that are not part of the pattern) with the 1720c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // ultimate chain result of the generated code. We will also add its chain 1721c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // inputs as inputs to the ultimate TokenFactor we create. 1722c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner Result = CR_LeadsToInteriorNode; 1723c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner ChainedNodesInPattern.push_back(User); 1724c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner InteriorChainedNodes.push_back(User); 1725c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner continue; 1726c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner } 1727c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1728c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner return Result; 1729c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner} 1730c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 17316b30792d2d7d142b8192241e6232aee004f745fbChris Lattner/// HandleMergeInputChains - This implements the OPC_EmitMergeInputChains 173200592ec857b4c3f31b46412e2738924238c59983Chris Lattner/// operation for when the pattern matched at least one node with a chains. The 1733c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// input vector contains a list of all of the chained nodes that we match. We 1734c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// must determine if this is a valid thing to cover (i.e. matching it won't 1735c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// induce cycles in the DAG) and if so, creating a TokenFactor node. that will 1736c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner/// be used as the input node chain for the generated nodes. 17376b30792d2d7d142b8192241e6232aee004f745fbChris Lattnerstatic SDValue 1738c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris LattnerHandleMergeInputChains(SmallVectorImpl<SDNode*> &ChainNodesMatched, 17396b30792d2d7d142b8192241e6232aee004f745fbChris Lattner SelectionDAG *CurDAG) { 1740c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // Walk all of the chained nodes we've matched, recursively scanning down the 1741c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // users of the chain result. This adds any TokenFactor nodes that are caught 1742c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // in between chained nodes to the chained and interior nodes list. 1743c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner SmallVector<SDNode*, 3> InteriorChainedNodes; 1744c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner for (unsigned i = 0, e = ChainNodesMatched.size(); i != e; ++i) { 1745c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner if (WalkChainUsers(ChainNodesMatched[i], ChainNodesMatched, 1746c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner InteriorChainedNodes) == CR_InducesCycle) 1747c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner return SDValue(); // Would induce a cycle. 1748c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner } 17496b30792d2d7d142b8192241e6232aee004f745fbChris Lattner 1750c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // Okay, we have walked all the matched nodes and collected TokenFactor nodes 1751c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // that we are interested in. Form our input TokenFactor node. 17526b30792d2d7d142b8192241e6232aee004f745fbChris Lattner SmallVector<SDValue, 3> InputChains; 17536b30792d2d7d142b8192241e6232aee004f745fbChris Lattner for (unsigned i = 0, e = ChainNodesMatched.size(); i != e; ++i) { 1754c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // Add the input chain of this node to the InputChains list (which will be 1755c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // the operands of the generated TokenFactor) if it's not an interior node. 1756c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner SDNode *N = ChainNodesMatched[i]; 1757c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner if (N->getOpcode() != ISD::TokenFactor) { 1758c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner if (std::count(InteriorChainedNodes.begin(),InteriorChainedNodes.end(),N)) 1759c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner continue; 1760c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1761c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // Otherwise, add the input chain. 1762c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner SDValue InChain = ChainNodesMatched[i]->getOperand(0); 1763c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner assert(InChain.getValueType() == MVT::Other && "Not a chain"); 17646b30792d2d7d142b8192241e6232aee004f745fbChris Lattner InputChains.push_back(InChain); 1765c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner continue; 1766c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner } 1767c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner 1768c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // If we have a token factor, we want to add all inputs of the token factor 1769c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner // that are not part of the pattern we're matching. 1770c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner for (unsigned op = 0, e = N->getNumOperands(); op != e; ++op) { 1771c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner if (!std::count(ChainNodesMatched.begin(), ChainNodesMatched.end(), 17726183fbd7267a7de857e32a2106cfb46a219728f1Chris Lattner N->getOperand(op).getNode())) 17736183fbd7267a7de857e32a2106cfb46a219728f1Chris Lattner InputChains.push_back(N->getOperand(op)); 1774c6d7ad3c7d83e9af29bf3ba3bf3280e72a952f98Chris Lattner } 17756b30792d2d7d142b8192241e6232aee004f745fbChris Lattner } 17766b30792d2d7d142b8192241e6232aee004f745fbChris Lattner 17776b30792d2d7d142b8192241e6232aee004f745fbChris Lattner SDValue Res; 17786b30792d2d7d142b8192241e6232aee004f745fbChris Lattner if (InputChains.size() == 1) 17796b30792d2d7d142b8192241e6232aee004f745fbChris Lattner return InputChains[0]; 17806b30792d2d7d142b8192241e6232aee004f745fbChris Lattner return CurDAG->getNode(ISD::TokenFactor, ChainNodesMatched[0]->getDebugLoc(), 17816b30792d2d7d142b8192241e6232aee004f745fbChris Lattner MVT::Other, &InputChains[0], InputChains.size()); 17826b30792d2d7d142b8192241e6232aee004f745fbChris Lattner} 17832a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 17843ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner/// MorphNode - Handle morphing a node in place for the selector. 17853ff1e4db7896a8ccec74800d52a926118d025260Chris LattnerSDNode *SelectionDAGISel:: 17863ff1e4db7896a8ccec74800d52a926118d025260Chris LattnerMorphNode(SDNode *Node, unsigned TargetOpc, SDVTList VTList, 17873ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner const SDValue *Ops, unsigned NumOps, unsigned EmitNodeInfo) { 17883ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // It is possible we're using MorphNodeTo to replace a node with no 17893ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // normal results with one that has a normal result (or we could be 17903ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // adding a chain) and the input could have flags and chains as well. 17913ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // In this case we need to shifting the operands down. 17923ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // FIXME: This is a horrible hack and broken in obscure cases, no worse 17933ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // than the old isel though. We should sink this into MorphNodeTo. 17943ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner int OldFlagResultNo = -1, OldChainResultNo = -1; 17953ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 17963ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner unsigned NTMNumResults = Node->getNumValues(); 17973ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner if (Node->getValueType(NTMNumResults-1) == MVT::Flag) { 17983ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner OldFlagResultNo = NTMNumResults-1; 17993ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner if (NTMNumResults != 1 && 18003ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner Node->getValueType(NTMNumResults-2) == MVT::Other) 18013ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner OldChainResultNo = NTMNumResults-2; 18023ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner } else if (Node->getValueType(NTMNumResults-1) == MVT::Other) 18033ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner OldChainResultNo = NTMNumResults-1; 18043ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 180561c97f693216670cda554d287cd871fdea1b36f9Chris Lattner // Call the underlying SelectionDAG routine to do the transmogrification. Note 180661c97f693216670cda554d287cd871fdea1b36f9Chris Lattner // that this deletes operands of the old node that become dead. 18073ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner SDNode *Res = CurDAG->MorphNodeTo(Node, ~TargetOpc, VTList, Ops, NumOps); 18083ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 18093ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // MorphNodeTo can operate in two ways: if an existing node with the 18103ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // specified operands exists, it can just return it. Otherwise, it 18113ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // updates the node in place to have the requested operands. 18123ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner if (Res == Node) { 18133ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // If we updated the node in place, reset the node ID. To the isel, 18143ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // this should be just like a newly allocated machine node. 18153ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner Res->setNodeId(-1); 18163ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner } 18173ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 18183ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner unsigned ResNumResults = Res->getNumValues(); 18193ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // Move the flag if needed. 18203ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner if ((EmitNodeInfo & OPFL_FlagOutput) && OldFlagResultNo != -1 && 18213ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner (unsigned)OldFlagResultNo != ResNumResults-1) 18223ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner CurDAG->ReplaceAllUsesOfValueWith(SDValue(Node, OldFlagResultNo), 18233ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner SDValue(Res, ResNumResults-1)); 18243ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 18253ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner if ((EmitNodeInfo & OPFL_FlagOutput) != 0) 18263ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner --ResNumResults; 18273ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 18283ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // Move the chain reference if needed. 18293ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner if ((EmitNodeInfo & OPFL_Chain) && OldChainResultNo != -1 && 18303ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner (unsigned)OldChainResultNo != ResNumResults-1) 18313ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner CurDAG->ReplaceAllUsesOfValueWith(SDValue(Node, OldChainResultNo), 18323ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner SDValue(Res, ResNumResults-1)); 18333ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 18343ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // Otherwise, no replacement happened because the node already exists. Replace 18353ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner // Uses of the old node with the new one. 18363ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner if (Res != Node) 18373ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner CurDAG->ReplaceAllUsesWith(Node, Res); 18383ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 18393ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner return Res; 18403ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner} 18413ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 1842f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner/// CheckPatternPredicate - Implements OP_CheckPatternPredicate. 1843f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerALWAYS_INLINE static bool 1844da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerCheckSame(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1845da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner SDValue N, const SmallVectorImpl<SDValue> &RecordedNodes) { 1846da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner // Accept if it is exactly the same as a previously recorded node. 1847da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner unsigned RecNo = MatcherTable[MatcherIndex++]; 1848da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner assert(RecNo < RecordedNodes.size() && "Invalid CheckSame"); 1849da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return N == RecordedNodes[RecNo]; 1850da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner} 1851da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1852da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner/// CheckPatternPredicate - Implements OP_CheckPatternPredicate. 1853da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerALWAYS_INLINE static bool 1854f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerCheckPatternPredicate(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1855f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner SelectionDAGISel &SDISel) { 1856f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return SDISel.CheckPatternPredicate(MatcherTable[MatcherIndex++]); 1857f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner} 1858f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 1859f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner/// CheckNodePredicate - Implements OP_CheckNodePredicate. 1860f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerALWAYS_INLINE static bool 1861f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerCheckNodePredicate(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1862f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner SelectionDAGISel &SDISel, SDNode *N) { 1863f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return SDISel.CheckNodePredicate(N, MatcherTable[MatcherIndex++]); 1864f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner} 1865f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 1866f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerALWAYS_INLINE static bool 1867f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerCheckOpcode(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1868f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner SDNode *N) { 1869f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return N->getOpcode() == MatcherTable[MatcherIndex++]; 1870f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner} 1871f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 1872f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerALWAYS_INLINE static bool 1873f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerCheckType(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1874f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner SDValue N, const TargetLowering &TLI) { 1875f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner MVT::SimpleValueType VT = (MVT::SimpleValueType)MatcherTable[MatcherIndex++]; 1876f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (N.getValueType() == VT) return true; 1877f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 1878f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // Handle the case when VT is iPTR. 1879f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return VT == MVT::iPTR && N.getValueType() == TLI.getPointerTy(); 1880f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner} 1881f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 1882f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerALWAYS_INLINE static bool 1883da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerCheckChildType(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1884da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner SDValue N, const TargetLowering &TLI, 1885da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner unsigned ChildNo) { 1886da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (ChildNo >= N.getNumOperands()) 1887da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return false; // Match fails if out of range child #. 1888da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return ::CheckType(MatcherTable, MatcherIndex, N.getOperand(ChildNo), TLI); 1889da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner} 1890da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1891da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1892da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerALWAYS_INLINE static bool 1893da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerCheckCondCode(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1894da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner SDValue N) { 1895da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return cast<CondCodeSDNode>(N)->get() == 1896da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner (ISD::CondCode)MatcherTable[MatcherIndex++]; 1897da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner} 1898da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1899da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerALWAYS_INLINE static bool 1900da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerCheckValueType(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1901da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner SDValue N, const TargetLowering &TLI) { 1902da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner MVT::SimpleValueType VT = (MVT::SimpleValueType)MatcherTable[MatcherIndex++]; 1903da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (cast<VTSDNode>(N)->getVT() == VT) 1904da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return true; 1905da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1906da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner // Handle the case when VT is iPTR. 1907da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return VT == MVT::iPTR && cast<VTSDNode>(N)->getVT() == TLI.getPointerTy(); 1908da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner} 1909da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1910da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerALWAYS_INLINE static bool 1911f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris LattnerCheckInteger(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1912f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner SDValue N) { 1913f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner int64_t Val = MatcherTable[MatcherIndex++]; 1914f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (Val & 128) 1915f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner Val = GetVBR(Val, MatcherTable, MatcherIndex); 1916f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 1917f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner ConstantSDNode *C = dyn_cast<ConstantSDNode>(N); 1918f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return C != 0 && C->getSExtValue() == Val; 1919f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner} 1920f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 1921da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerALWAYS_INLINE static bool 1922da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerCheckAndImm(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1923da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner SDValue N, SelectionDAGISel &SDISel) { 1924da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner int64_t Val = MatcherTable[MatcherIndex++]; 1925da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (Val & 128) 1926da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Val = GetVBR(Val, MatcherTable, MatcherIndex); 1927da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1928da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (N->getOpcode() != ISD::AND) return false; 1929da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1930da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1)); 1931da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return C != 0 && SDISel.CheckAndMask(N.getOperand(0), C, Val); 1932da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner} 1933da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1934da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerALWAYS_INLINE static bool 1935da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris LattnerCheckOrImm(const unsigned char *MatcherTable, unsigned &MatcherIndex, 1936da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner SDValue N, SelectionDAGISel &SDISel) { 1937da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner int64_t Val = MatcherTable[MatcherIndex++]; 1938da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (Val & 128) 1939da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Val = GetVBR(Val, MatcherTable, MatcherIndex); 1940da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1941da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (N->getOpcode() != ISD::OR) return false; 1942da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1943da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1)); 1944da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return C != 0 && SDISel.CheckOrMask(N.getOperand(0), C, Val); 1945da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner} 1946da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner 1947f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner/// IsPredicateKnownToFail - If we know how and can do so without pushing a 1948f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner/// scope, evaluate the current node. If the current predicate is known to 1949f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner/// fail, set Result=true and return anything. If the current predicate is 1950f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner/// known to pass, set Result=false and return the MatcherIndex to continue 1951f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner/// with. If the current predicate is unknown, set Result=false and return the 1952f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner/// MatcherIndex to continue with. 1953f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattnerstatic unsigned IsPredicateKnownToFail(const unsigned char *Table, 1954f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner unsigned Index, SDValue N, 1955da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner bool &Result, SelectionDAGISel &SDISel, 1956da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner SmallVectorImpl<SDValue> &RecordedNodes){ 1957f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner switch (Table[Index++]) { 1958f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner default: 1959f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner Result = false; 1960f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return Index-1; // Could not evaluate this predicate. 1961da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case SelectionDAGISel::OPC_CheckSame: 1962da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Result = !::CheckSame(Table, Index, N, RecordedNodes); 1963da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return Index; 1964f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckPatternPredicate: 1965da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Result = !::CheckPatternPredicate(Table, Index, SDISel); 1966f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return Index; 1967f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckPredicate: 1968da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Result = !::CheckNodePredicate(Table, Index, SDISel, N.getNode()); 1969f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return Index; 1970f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckOpcode: 1971f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner Result = !::CheckOpcode(Table, Index, N.getNode()); 1972f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return Index; 1973f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckType: 1974f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner Result = !::CheckType(Table, Index, N, SDISel.TLI); 1975f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return Index; 1976f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckChild0Type: 1977f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckChild1Type: 1978f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckChild2Type: 1979f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckChild3Type: 1980f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckChild4Type: 1981f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckChild5Type: 1982f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckChild6Type: 1983da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case SelectionDAGISel::OPC_CheckChild7Type: 1984da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Result = !::CheckChildType(Table, Index, N, SDISel.TLI, 1985da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Table[Index-1] - SelectionDAGISel::OPC_CheckChild0Type); 1986da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return Index; 1987da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case SelectionDAGISel::OPC_CheckCondCode: 1988da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Result = !::CheckCondCode(Table, Index, N); 1989da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return Index; 1990da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case SelectionDAGISel::OPC_CheckValueType: 1991da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Result = !::CheckValueType(Table, Index, N, SDISel.TLI); 1992f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return Index; 1993f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case SelectionDAGISel::OPC_CheckInteger: 1994f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner Result = !::CheckInteger(Table, Index, N); 1995f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner return Index; 1996da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case SelectionDAGISel::OPC_CheckAndImm: 1997da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Result = !::CheckAndImm(Table, Index, N, SDISel); 1998da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return Index; 1999da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case SelectionDAGISel::OPC_CheckOrImm: 2000da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Result = !::CheckOrImm(Table, Index, N, SDISel); 2001da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner return Index; 2002f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner } 2003f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner} 2004f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 20053ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner 20062a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattnerstruct MatchScope { 20072a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner /// FailIndex - If this match fails, this is the index to continue with. 20082a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned FailIndex; 20092a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20102a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner /// NodeStack - The node stack when the scope was formed. 20112a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SmallVector<SDValue, 4> NodeStack; 20122a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20132a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner /// NumRecordedNodes - The number of recorded nodes when the scope was formed. 20142a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned NumRecordedNodes; 20152a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20162a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner /// NumMatchedMemRefs - The number of matched memref entries. 20172a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned NumMatchedMemRefs; 20182a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20192a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner /// InputChain/InputFlag - The current chain/flag 20202a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDValue InputChain, InputFlag; 20212a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20222a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner /// HasChainNodesMatched - True if the ChainNodesMatched list is non-empty. 20232a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner bool HasChainNodesMatched, HasFlagResultNodesMatched; 20242a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner}; 20252a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20262a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris LattnerSDNode *SelectionDAGISel:: 20272a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris LattnerSelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable, 20282a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned TableSize) { 20292a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // FIXME: Should these even be selected? Handle these cases in the caller? 20302a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner switch (NodeToMatch->getOpcode()) { 20312a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner default: 20322a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner break; 20332a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::EntryToken: // These nodes remain the same. 20342a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::BasicBlock: 20352a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::Register: 20362a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::HANDLENODE: 20372a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TargetConstant: 20382a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TargetConstantFP: 20392a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TargetConstantPool: 20402a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TargetFrameIndex: 20412a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TargetExternalSymbol: 20422a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TargetBlockAddress: 20432a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TargetJumpTable: 20442a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TargetGlobalTLSAddress: 20452a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TargetGlobalAddress: 20462a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::TokenFactor: 20472a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::CopyFromReg: 20482a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::CopyToReg: 2049d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner NodeToMatch->setNodeId(-1); // Mark selected. 20502a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner return 0; 20512a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::AssertSext: 20522a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::AssertZext: 20532a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner CurDAG->ReplaceAllUsesOfValueWith(SDValue(NodeToMatch, 0), 20542a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeToMatch->getOperand(0)); 20552a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner return 0; 20562a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::INLINEASM: return Select_INLINEASM(NodeToMatch); 20572a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::EH_LABEL: return Select_EH_LABEL(NodeToMatch); 20582a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case ISD::UNDEF: return Select_UNDEF(NodeToMatch); 20592a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 20602a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20612a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(!NodeToMatch->isMachineOpcode() && "Node already selected!"); 20622a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20632a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Set up the node stack with NodeToMatch as the only node on the stack. 20642a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SmallVector<SDValue, 8> NodeStack; 20652a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDValue N = SDValue(NodeToMatch, 0); 20662a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeStack.push_back(N); 20672a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20682a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // MatchScopes - Scopes used when matching, if a match failure happens, this 20692a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // indicates where to continue checking. 20702a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SmallVector<MatchScope, 8> MatchScopes; 20712a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20722a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // RecordedNodes - This is the set of nodes that have been recorded by the 20732a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // state machine. 20742a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SmallVector<SDValue, 8> RecordedNodes; 20752a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20762a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // MatchedMemRefs - This is the set of MemRef's we've seen in the input 20772a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // pattern. 20782a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SmallVector<MachineMemOperand*, 2> MatchedMemRefs; 20792a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20802a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // These are the current input chain and flag for use when generating nodes. 20812a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Various Emit operations change these. For example, emitting a copytoreg 20822a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // uses and updates these. 20832a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDValue InputChain, InputFlag; 20842a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20852a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // ChainNodesMatched - If a pattern matches nodes that have input/output 20862a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // chains, the OPC_EmitMergeInputChains operation is emitted which indicates 20872a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // which ones they are. The result is captured into this list so that we can 20882a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // update the chain results when the pattern is complete. 20892a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SmallVector<SDNode*, 3> ChainNodesMatched; 20902a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SmallVector<SDNode*, 3> FlagResultNodesMatched; 20912a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20922a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner DEBUG(errs() << "ISEL: Starting pattern match on root node: "; 20932a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeToMatch->dump(CurDAG); 20942a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner errs() << '\n'); 20952a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 20967390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // Determine where to start the interpreter. Normally we start at opcode #0, 20977390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // but if the state machine starts with an OPC_SwitchOpcode, then we 20987390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // accelerate the first lookup (which is guaranteed to be hot) with the 20997390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // OpcodeOffset table. 21002a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned MatcherIndex = 0; 21017390eebd49b786f3293d24f76fedb02fe183468cChris Lattner 21027390eebd49b786f3293d24f76fedb02fe183468cChris Lattner if (!OpcodeOffset.empty()) { 21037390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // Already computed the OpcodeOffset table, just index into it. 21047390eebd49b786f3293d24f76fedb02fe183468cChris Lattner if (N.getOpcode() < OpcodeOffset.size()) 21057390eebd49b786f3293d24f76fedb02fe183468cChris Lattner MatcherIndex = OpcodeOffset[N.getOpcode()]; 21067390eebd49b786f3293d24f76fedb02fe183468cChris Lattner DEBUG(errs() << " Initial Opcode index to " << MatcherIndex << "\n"); 21077390eebd49b786f3293d24f76fedb02fe183468cChris Lattner 21087390eebd49b786f3293d24f76fedb02fe183468cChris Lattner } else if (MatcherTable[0] == OPC_SwitchOpcode) { 21097390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // Otherwise, the table isn't computed, but the state machine does start 21107390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // with an OPC_SwitchOpcode instruction. Populate the table now, since this 21117390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // is the first time we're selecting an instruction. 21127390eebd49b786f3293d24f76fedb02fe183468cChris Lattner unsigned Idx = 1; 21137390eebd49b786f3293d24f76fedb02fe183468cChris Lattner while (1) { 21147390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // Get the size of this case. 21157390eebd49b786f3293d24f76fedb02fe183468cChris Lattner unsigned CaseSize = MatcherTable[Idx++]; 21167390eebd49b786f3293d24f76fedb02fe183468cChris Lattner if (CaseSize & 128) 21177390eebd49b786f3293d24f76fedb02fe183468cChris Lattner CaseSize = GetVBR(CaseSize, MatcherTable, Idx); 21187390eebd49b786f3293d24f76fedb02fe183468cChris Lattner if (CaseSize == 0) break; 21197390eebd49b786f3293d24f76fedb02fe183468cChris Lattner 21207390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // Get the opcode, add the index to the table. 21217390eebd49b786f3293d24f76fedb02fe183468cChris Lattner unsigned Opc = MatcherTable[Idx++]; 21227390eebd49b786f3293d24f76fedb02fe183468cChris Lattner if (Opc >= OpcodeOffset.size()) 21237390eebd49b786f3293d24f76fedb02fe183468cChris Lattner OpcodeOffset.resize((Opc+1)*2); 21247390eebd49b786f3293d24f76fedb02fe183468cChris Lattner OpcodeOffset[Opc] = Idx; 21257390eebd49b786f3293d24f76fedb02fe183468cChris Lattner Idx += CaseSize; 21267390eebd49b786f3293d24f76fedb02fe183468cChris Lattner } 21277390eebd49b786f3293d24f76fedb02fe183468cChris Lattner 21287390eebd49b786f3293d24f76fedb02fe183468cChris Lattner // Okay, do the lookup for the first opcode. 21297390eebd49b786f3293d24f76fedb02fe183468cChris Lattner if (N.getOpcode() < OpcodeOffset.size()) 21307390eebd49b786f3293d24f76fedb02fe183468cChris Lattner MatcherIndex = OpcodeOffset[N.getOpcode()]; 21317390eebd49b786f3293d24f76fedb02fe183468cChris Lattner } 21327390eebd49b786f3293d24f76fedb02fe183468cChris Lattner 21332a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner while (1) { 21342a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(MatcherIndex < TableSize && "Invalid index"); 21352a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner BuiltinOpcodes Opcode = (BuiltinOpcodes)MatcherTable[MatcherIndex++]; 21362a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner switch (Opcode) { 21372a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_Scope: { 2138f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // Okay, the semantics of this operation are that we should push a scope 2139f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // then evaluate the first child. However, pushing a scope only to have 2140f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // the first check fail (which then pops it) is inefficient. If we can 2141f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // determine immediately that the first check (or first several) will 2142f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // immediately fail, don't even bother pushing a scope for them. 2143f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner unsigned FailIndex; 2144f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 2145f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner while (1) { 2146f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner unsigned NumToSkip = MatcherTable[MatcherIndex++]; 2147f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (NumToSkip & 128) 2148f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner NumToSkip = GetVBR(NumToSkip, MatcherTable, MatcherIndex); 2149f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // Found the end of the scope with no match. 2150f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (NumToSkip == 0) { 2151f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner FailIndex = 0; 2152f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner break; 2153f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner } 2154f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 2155f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner FailIndex = MatcherIndex+NumToSkip; 2156f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 2157f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // If we can't evaluate this predicate without pushing a scope (e.g. if 2158f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // it is a 'MoveParent') or if the predicate succeeds on this node, we 2159f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // push the scope and evaluate the full predicate chain. 2160f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner bool Result; 2161f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner MatcherIndex = IsPredicateKnownToFail(MatcherTable, MatcherIndex, N, 2162da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Result, *this, RecordedNodes); 2163f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (!Result) 2164f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner break; 2165f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 2166f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner DEBUG(errs() << " Skipped scope entry at index " << MatcherIndex 2167f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner << " continuing at " << FailIndex << "\n"); 21682a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 2169f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 2170f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // Otherwise, we know that this case of the Scope is guaranteed to fail, 2171f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // move to the next case. 2172f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner MatcherIndex = FailIndex; 2173f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner } 2174f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 2175f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner // If the whole scope failed to match, bail. 2176f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (FailIndex == 0) break; 2177f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 21782a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Push a MatchScope which indicates where to go if the first child fails 21792a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // to match. 21802a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MatchScope NewEntry; 2181f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner NewEntry.FailIndex = FailIndex; 21822a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NewEntry.NodeStack.append(NodeStack.begin(), NodeStack.end()); 21832a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NewEntry.NumRecordedNodes = RecordedNodes.size(); 21842a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NewEntry.NumMatchedMemRefs = MatchedMemRefs.size(); 21852a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NewEntry.InputChain = InputChain; 21862a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NewEntry.InputFlag = InputFlag; 21872a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NewEntry.HasChainNodesMatched = !ChainNodesMatched.empty(); 21882a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NewEntry.HasFlagResultNodesMatched = !FlagResultNodesMatched.empty(); 21892a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MatchScopes.push_back(NewEntry); 21902a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 21912a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 21922a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_RecordNode: 21932a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Remember this node, it may end up being an operand in the pattern. 21942a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecordedNodes.push_back(N); 21952a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 21962a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 21972a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_RecordChild0: case OPC_RecordChild1: 21982a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_RecordChild2: case OPC_RecordChild3: 21992a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_RecordChild4: case OPC_RecordChild5: 22002a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_RecordChild6: case OPC_RecordChild7: { 22012a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned ChildNo = Opcode-OPC_RecordChild0; 22022a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (ChildNo >= N.getNumOperands()) 22032a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner break; // Match fails if out of range child #. 22042a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 22052a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecordedNodes.push_back(N->getOperand(ChildNo)); 22062a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 22072a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 22082a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_RecordMemRef: 22092a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MatchedMemRefs.push_back(cast<MemSDNode>(N)->getMemOperand()); 22102a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 22112a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 22122a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CaptureFlagInput: 22132a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If the current node has an input flag, capture it in InputFlag. 22142a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (N->getNumOperands() != 0 && 22152a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner N->getOperand(N->getNumOperands()-1).getValueType() == MVT::Flag) 22162a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputFlag = N->getOperand(N->getNumOperands()-1); 22172a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 22182a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 22192a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_MoveChild: { 22202a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned ChildNo = MatcherTable[MatcherIndex++]; 22212a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (ChildNo >= N.getNumOperands()) 22222a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner break; // Match fails if out of range child #. 22232a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner N = N.getOperand(ChildNo); 22242a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeStack.push_back(N); 22252a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 22262a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 22272a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 22282a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_MoveParent: 22292a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Pop the current node off the NodeStack. 22302a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeStack.pop_back(); 22312a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(!NodeStack.empty() && "Node stack imbalance!"); 22322a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner N = NodeStack.back(); 22332a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 22342a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 2235da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case OPC_CheckSame: 2236da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (!::CheckSame(MatcherTable, MatcherIndex, N, RecordedNodes)) break; 22372a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 22382a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CheckPatternPredicate: 2239f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (!::CheckPatternPredicate(MatcherTable, MatcherIndex, *this)) break; 22402a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 22412a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CheckPredicate: 2242f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (!::CheckNodePredicate(MatcherTable, MatcherIndex, *this, 2243f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner N.getNode())) 2244f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner break; 22452a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 224657bf8a483edf97589c3e6085721e72fc187677a8Chris Lattner case OPC_CheckComplexPat: { 224757bf8a483edf97589c3e6085721e72fc187677a8Chris Lattner unsigned CPNum = MatcherTable[MatcherIndex++]; 224857bf8a483edf97589c3e6085721e72fc187677a8Chris Lattner unsigned RecNo = MatcherTable[MatcherIndex++]; 224957bf8a483edf97589c3e6085721e72fc187677a8Chris Lattner assert(RecNo < RecordedNodes.size() && "Invalid CheckComplexPat"); 225057bf8a483edf97589c3e6085721e72fc187677a8Chris Lattner if (!CheckComplexPattern(NodeToMatch, RecordedNodes[RecNo], CPNum, 225157bf8a483edf97589c3e6085721e72fc187677a8Chris Lattner RecordedNodes)) 22522a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner break; 22532a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 225457bf8a483edf97589c3e6085721e72fc187677a8Chris Lattner } 22552a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CheckOpcode: 2256f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (!::CheckOpcode(MatcherTable, MatcherIndex, N.getNode())) break; 2257f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner continue; 2258f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner 2259f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case OPC_CheckType: 2260f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (!::CheckType(MatcherTable, MatcherIndex, N, TLI)) break; 22612a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 22622a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 2263eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner case OPC_SwitchOpcode: { 2264eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner unsigned CurNodeOpcode = N.getOpcode(); 22657d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner unsigned SwitchStart = MatcherIndex-1; (void)SwitchStart; 2266eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner unsigned CaseSize; 2267eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner while (1) { 2268eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner // Get the size of this case. 2269eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner CaseSize = MatcherTable[MatcherIndex++]; 2270eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner if (CaseSize & 128) 2271eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner CaseSize = GetVBR(CaseSize, MatcherTable, MatcherIndex); 2272eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner if (CaseSize == 0) break; 2273eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner 2274eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner // If the opcode matches, then we will execute this case. 2275eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner if (CurNodeOpcode == MatcherTable[MatcherIndex++]) 2276eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner break; 2277eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner 2278eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner // Otherwise, skip over this case. 2279eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner MatcherIndex += CaseSize; 2280eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner } 2281eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner 2282cfe2eab7446dedc471592fe702fefef783383171Chris Lattner // If no cases matched, bail out. 2283eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner if (CaseSize == 0) break; 2284eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner 2285eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner // Otherwise, execute the case we found. 2286eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner DEBUG(errs() << " OpcodeSwitch from " << SwitchStart 2287eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner << " to " << MatcherIndex << "\n"); 2288eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner continue; 2289eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner } 2290eb66921adb943ea841e72c8eee4777607c48b70eChris Lattner 2291cfe2eab7446dedc471592fe702fefef783383171Chris Lattner case OPC_SwitchType: { 2292cfe2eab7446dedc471592fe702fefef783383171Chris Lattner MVT::SimpleValueType CurNodeVT = N.getValueType().getSimpleVT().SimpleTy; 2293cfe2eab7446dedc471592fe702fefef783383171Chris Lattner unsigned SwitchStart = MatcherIndex-1; (void)SwitchStart; 2294cfe2eab7446dedc471592fe702fefef783383171Chris Lattner unsigned CaseSize; 2295cfe2eab7446dedc471592fe702fefef783383171Chris Lattner while (1) { 2296cfe2eab7446dedc471592fe702fefef783383171Chris Lattner // Get the size of this case. 2297cfe2eab7446dedc471592fe702fefef783383171Chris Lattner CaseSize = MatcherTable[MatcherIndex++]; 2298cfe2eab7446dedc471592fe702fefef783383171Chris Lattner if (CaseSize & 128) 2299cfe2eab7446dedc471592fe702fefef783383171Chris Lattner CaseSize = GetVBR(CaseSize, MatcherTable, MatcherIndex); 2300cfe2eab7446dedc471592fe702fefef783383171Chris Lattner if (CaseSize == 0) break; 2301cfe2eab7446dedc471592fe702fefef783383171Chris Lattner 2302cfe2eab7446dedc471592fe702fefef783383171Chris Lattner MVT::SimpleValueType CaseVT = 2303cfe2eab7446dedc471592fe702fefef783383171Chris Lattner (MVT::SimpleValueType)MatcherTable[MatcherIndex++]; 2304cfe2eab7446dedc471592fe702fefef783383171Chris Lattner if (CaseVT == MVT::iPTR) 2305cfe2eab7446dedc471592fe702fefef783383171Chris Lattner CaseVT = TLI.getPointerTy().SimpleTy; 2306cfe2eab7446dedc471592fe702fefef783383171Chris Lattner 2307cfe2eab7446dedc471592fe702fefef783383171Chris Lattner // If the VT matches, then we will execute this case. 2308cfe2eab7446dedc471592fe702fefef783383171Chris Lattner if (CurNodeVT == CaseVT) 2309cfe2eab7446dedc471592fe702fefef783383171Chris Lattner break; 2310cfe2eab7446dedc471592fe702fefef783383171Chris Lattner 2311cfe2eab7446dedc471592fe702fefef783383171Chris Lattner // Otherwise, skip over this case. 2312cfe2eab7446dedc471592fe702fefef783383171Chris Lattner MatcherIndex += CaseSize; 2313cfe2eab7446dedc471592fe702fefef783383171Chris Lattner } 2314cfe2eab7446dedc471592fe702fefef783383171Chris Lattner 2315cfe2eab7446dedc471592fe702fefef783383171Chris Lattner // If no cases matched, bail out. 2316cfe2eab7446dedc471592fe702fefef783383171Chris Lattner if (CaseSize == 0) break; 2317cfe2eab7446dedc471592fe702fefef783383171Chris Lattner 2318cfe2eab7446dedc471592fe702fefef783383171Chris Lattner // Otherwise, execute the case we found. 2319cfe2eab7446dedc471592fe702fefef783383171Chris Lattner DEBUG(errs() << " TypeSwitch[" << EVT(CurNodeVT).getEVTString() 2320cfe2eab7446dedc471592fe702fefef783383171Chris Lattner << "] from " << SwitchStart << " to " << MatcherIndex<<'\n'); 2321cfe2eab7446dedc471592fe702fefef783383171Chris Lattner continue; 2322cfe2eab7446dedc471592fe702fefef783383171Chris Lattner } 23232a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CheckChild0Type: case OPC_CheckChild1Type: 23242a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CheckChild2Type: case OPC_CheckChild3Type: 23252a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CheckChild4Type: case OPC_CheckChild5Type: 2326da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case OPC_CheckChild6Type: case OPC_CheckChild7Type: 2327da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (!::CheckChildType(MatcherTable, MatcherIndex, N, TLI, 2328da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner Opcode-OPC_CheckChild0Type)) 2329f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner break; 23302a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 23312a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CheckCondCode: 2332da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (!::CheckCondCode(MatcherTable, MatcherIndex, N)) break; 23332a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 2334da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case OPC_CheckValueType: 2335da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (!::CheckValueType(MatcherTable, MatcherIndex, N, TLI)) break; 23362a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 2337f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner case OPC_CheckInteger: 2338f1b7c7d476a2f30f035c527cfe8e14c6c6255f07Chris Lattner if (!::CheckInteger(MatcherTable, MatcherIndex, N)) break; 23392a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 2340da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case OPC_CheckAndImm: 2341da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (!::CheckAndImm(MatcherTable, MatcherIndex, N, *this)) break; 23422a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 2343da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner case OPC_CheckOrImm: 2344da828e3c8c869c0a62fefbd4c14811ca6fb4913dChris Lattner if (!::CheckOrImm(MatcherTable, MatcherIndex, N, *this)) break; 23452a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 23462a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 23472a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CheckFoldableChainNode: { 23482a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(NodeStack.size() != 1 && "No parent node"); 23492a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Verify that all intermediate nodes between the root and this one have 23502a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // a single use. 23512a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner bool HasMultipleUses = false; 23522a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner for (unsigned i = 1, e = NodeStack.size()-1; i != e; ++i) 23532a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (!NodeStack[i].hasOneUse()) { 23542a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner HasMultipleUses = true; 23552a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner break; 23562a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 23572a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (HasMultipleUses) break; 23582a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 23592a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Check to see that the target thinks this is profitable to fold and that 23602a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // we can fold it without inducing cycles in the graph. 23612a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (!IsProfitableToFold(N, NodeStack[NodeStack.size()-2].getNode(), 23622a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeToMatch) || 23632a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner !IsLegalToFold(N, NodeStack[NodeStack.size()-2].getNode(), 2364d1b738298359846b9cccaa0931e6ec1fc59a6d87Chris Lattner NodeToMatch, true/*We validate our own chains*/)) 23652a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner break; 23662a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 23672a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 23682a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 23692a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_EmitInteger: { 23702a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MVT::SimpleValueType VT = 23712a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner (MVT::SimpleValueType)MatcherTable[MatcherIndex++]; 23722a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner int64_t Val = MatcherTable[MatcherIndex++]; 23732a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (Val & 128) 23742a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Val = GetVBR(Val, MatcherTable, MatcherIndex); 23752a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecordedNodes.push_back(CurDAG->getTargetConstant(Val, VT)); 23762a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 23772a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 23782a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_EmitRegister: { 23792a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MVT::SimpleValueType VT = 23802a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner (MVT::SimpleValueType)MatcherTable[MatcherIndex++]; 23812a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned RegNo = MatcherTable[MatcherIndex++]; 23822a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecordedNodes.push_back(CurDAG->getRegister(RegNo, VT)); 23832a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 23842a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 23852a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 23862a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_EmitConvertToTarget: { 23872a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Convert from IMM/FPIMM to target version. 23882a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned RecNo = MatcherTable[MatcherIndex++]; 23892a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(RecNo < RecordedNodes.size() && "Invalid CheckSame"); 23902a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDValue Imm = RecordedNodes[RecNo]; 23912a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 23922a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (Imm->getOpcode() == ISD::Constant) { 23932a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner int64_t Val = cast<ConstantSDNode>(Imm)->getZExtValue(); 23942a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Imm = CurDAG->getTargetConstant(Val, Imm.getValueType()); 23952a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } else if (Imm->getOpcode() == ISD::ConstantFP) { 23962a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner const ConstantFP *Val=cast<ConstantFPSDNode>(Imm)->getConstantFPValue(); 23972a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Imm = CurDAG->getTargetConstantFP(*Val, Imm.getValueType()); 23982a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 23992a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24002a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecordedNodes.push_back(Imm); 24012a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 24022a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 24032a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24042a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_EmitMergeInputChains: { 24052a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(InputChain.getNode() == 0 && 24062a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner "EmitMergeInputChains should be the first chain producing node"); 24072a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // This node gets a list of nodes we matched in the input that have 24082a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // chains. We want to token factor all of the input chains to these nodes 24092a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // together. However, if any of the input chains is actually one of the 24102a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // nodes matched in this pattern, then we have an intra-match reference. 24112a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Ignore these because the newly token factored chain should not refer to 24122a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // the old nodes. 24132a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned NumChains = MatcherTable[MatcherIndex++]; 24142a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(NumChains != 0 && "Can't TF zero chains"); 24152a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24162a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(ChainNodesMatched.empty() && 24172a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner "Should only have one EmitMergeInputChains per match"); 24182a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24192a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Read all of the chained nodes. 242000592ec857b4c3f31b46412e2738924238c59983Chris Lattner for (unsigned i = 0; i != NumChains; ++i) { 242100592ec857b4c3f31b46412e2738924238c59983Chris Lattner unsigned RecNo = MatcherTable[MatcherIndex++]; 24222a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(RecNo < RecordedNodes.size() && "Invalid CheckSame"); 24232a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner ChainNodesMatched.push_back(RecordedNodes[RecNo].getNode()); 24242a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24252a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // FIXME: What if other value results of the node have uses not matched 24262a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // by this pattern? 24272a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (ChainNodesMatched.back() != NodeToMatch && 24282a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner !RecordedNodes[RecNo].hasOneUse()) { 24292a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner ChainNodesMatched.clear(); 24302a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner break; 24312a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 24322a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 24336b30792d2d7d142b8192241e6232aee004f745fbChris Lattner 24346b30792d2d7d142b8192241e6232aee004f745fbChris Lattner // If the inner loop broke out, the match fails. 24356b30792d2d7d142b8192241e6232aee004f745fbChris Lattner if (ChainNodesMatched.empty()) 24366b30792d2d7d142b8192241e6232aee004f745fbChris Lattner break; 24372a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24386b30792d2d7d142b8192241e6232aee004f745fbChris Lattner // Merge the input chains if they are not intra-pattern references. 24396b30792d2d7d142b8192241e6232aee004f745fbChris Lattner InputChain = HandleMergeInputChains(ChainNodesMatched, CurDAG); 24406b30792d2d7d142b8192241e6232aee004f745fbChris Lattner 24416b30792d2d7d142b8192241e6232aee004f745fbChris Lattner if (InputChain.getNode() == 0) 24426b30792d2d7d142b8192241e6232aee004f745fbChris Lattner break; // Failed to merge. 24432a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24442a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 24452a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 24462a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24472a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_EmitCopyToReg: { 24482a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned RecNo = MatcherTable[MatcherIndex++]; 24492a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(RecNo < RecordedNodes.size() && "Invalid CheckSame"); 24502a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned DestPhysReg = MatcherTable[MatcherIndex++]; 24512a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24522a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (InputChain.getNode() == 0) 24532a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputChain = CurDAG->getEntryNode(); 24542a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24552a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputChain = CurDAG->getCopyToReg(InputChain, NodeToMatch->getDebugLoc(), 24562a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner DestPhysReg, RecordedNodes[RecNo], 24572a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputFlag); 24582a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24592a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputFlag = InputChain.getValue(1); 24602a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 24612a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 24622a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24632a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_EmitNodeXForm: { 24642a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned XFormNo = MatcherTable[MatcherIndex++]; 24652a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned RecNo = MatcherTable[MatcherIndex++]; 24662a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(RecNo < RecordedNodes.size() && "Invalid CheckSame"); 24672a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecordedNodes.push_back(RunSDNodeXForm(RecordedNodes[RecNo], XFormNo)); 24682a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 24692a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 24702a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24712a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_EmitNode: 24722a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_MorphNodeTo: { 247314df8dc680d40173f34d693f9dc451f8a30c907bChris Lattner uint16_t TargetOpc = MatcherTable[MatcherIndex++]; 247414df8dc680d40173f34d693f9dc451f8a30c907bChris Lattner TargetOpc |= (unsigned short)MatcherTable[MatcherIndex++] << 8; 24752a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned EmitNodeInfo = MatcherTable[MatcherIndex++]; 24762a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Get the result VT list. 24772a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned NumVTs = MatcherTable[MatcherIndex++]; 24782a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SmallVector<EVT, 4> VTs; 24792a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner for (unsigned i = 0; i != NumVTs; ++i) { 24802a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MVT::SimpleValueType VT = 24812a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner (MVT::SimpleValueType)MatcherTable[MatcherIndex++]; 24822a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (VT == MVT::iPTR) VT = TLI.getPointerTy().SimpleTy; 24832a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner VTs.push_back(VT); 24842a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 24852a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24862a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (EmitNodeInfo & OPFL_Chain) 24872a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner VTs.push_back(MVT::Other); 24882a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (EmitNodeInfo & OPFL_FlagOutput) 24892a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner VTs.push_back(MVT::Flag); 24902a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 24917d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner // This is hot code, so optimize the two most common cases of 1 and 2 24927d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner // results. 24937d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner SDVTList VTList; 24947d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner if (VTs.size() == 1) 24957d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner VTList = CurDAG->getVTList(VTs[0]); 24967d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner else if (VTs.size() == 2) 24977d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner VTList = CurDAG->getVTList(VTs[0], VTs[1]); 24987d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner else 24997d892d6e6d451e9a0d0f9db839a943a256126c05Chris Lattner VTList = CurDAG->getVTList(VTs.data(), VTs.size()); 25002a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25012a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Get the operand list. 25022a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned NumOps = MatcherTable[MatcherIndex++]; 25032a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SmallVector<SDValue, 8> Ops; 25042a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner for (unsigned i = 0; i != NumOps; ++i) { 25052a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned RecNo = MatcherTable[MatcherIndex++]; 25062a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (RecNo & 128) 25072a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecNo = GetVBR(RecNo, MatcherTable, MatcherIndex); 25082a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25092a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(RecNo < RecordedNodes.size() && "Invalid EmitNode"); 25102a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Ops.push_back(RecordedNodes[RecNo]); 25112a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 25122a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25132a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If there are variadic operands to add, handle them now. 25142a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (EmitNodeInfo & OPFL_VariadicInfo) { 25152a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Determine the start index to copy from. 25162a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned FirstOpToCopy = getNumFixedFromVariadicInfo(EmitNodeInfo); 25172a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner FirstOpToCopy += (EmitNodeInfo & OPFL_Chain) ? 1 : 0; 25182a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(NodeToMatch->getNumOperands() >= FirstOpToCopy && 25192a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner "Invalid variadic node"); 25202a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Copy all of the variadic operands, not including a potential flag 25212a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // input. 25222a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner for (unsigned i = FirstOpToCopy, e = NodeToMatch->getNumOperands(); 25232a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner i != e; ++i) { 25242a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDValue V = NodeToMatch->getOperand(i); 25252a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (V.getValueType() == MVT::Flag) break; 25262a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Ops.push_back(V); 25272a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 25282a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 25292a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25302a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If this has chain/flag inputs, add them. 25312a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (EmitNodeInfo & OPFL_Chain) 25322a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Ops.push_back(InputChain); 25332a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if ((EmitNodeInfo & OPFL_FlagInput) && InputFlag.getNode() != 0) 25342a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Ops.push_back(InputFlag); 25352a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25362a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Create the node. 25372a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDNode *Res = 0; 25382a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (Opcode != OPC_MorphNodeTo) { 25392a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If this is a normal EmitNode command, just create the new node and 25402a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // add the results to the RecordedNodes list. 25412a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Res = CurDAG->getMachineNode(TargetOpc, NodeToMatch->getDebugLoc(), 25422a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner VTList, Ops.data(), Ops.size()); 25432a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25442a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Add all the non-flag/non-chain results to the RecordedNodes list. 25452a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner for (unsigned i = 0, e = VTs.size(); i != e; ++i) { 25462a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (VTs[i] == MVT::Other || VTs[i] == MVT::Flag) break; 25472a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecordedNodes.push_back(SDValue(Res, i)); 25482a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 25492a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25502a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } else { 25513ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner Res = MorphNode(NodeToMatch, TargetOpc, VTList, Ops.data(), Ops.size(), 25523ff1e4db7896a8ccec74800d52a926118d025260Chris Lattner EmitNodeInfo); 25532a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 25542a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25552a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If the node had chain/flag results, update our notion of the current 25562a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // chain and flag. 255782dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner if (EmitNodeInfo & OPFL_FlagOutput) { 25582a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputFlag = SDValue(Res, VTs.size()-1); 25592a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (EmitNodeInfo & OPFL_Chain) 25602a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputChain = SDValue(Res, VTs.size()-2); 25612a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } else if (EmitNodeInfo & OPFL_Chain) 25622a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputChain = SDValue(Res, VTs.size()-1); 25632a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25642a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If the OPFL_MemRefs flag is set on this node, slap all of the 25652a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // accumulated memrefs onto it. 25662a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // 25672a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // FIXME: This is vastly incorrect for patterns with multiple outputs 25682a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // instructions that access memory and for ComplexPatterns that match 25692a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // loads. 25702a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (EmitNodeInfo & OPFL_MemRefs) { 25712a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MachineSDNode::mmo_iterator MemRefs = 25722a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MF->allocateMemRefsArray(MatchedMemRefs.size()); 25732a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner std::copy(MatchedMemRefs.begin(), MatchedMemRefs.end(), MemRefs); 25742a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner cast<MachineSDNode>(Res) 25752a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner ->setMemRefs(MemRefs, MemRefs + MatchedMemRefs.size()); 25762a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 25772a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25782a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner DEBUG(errs() << " " 25792a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner << (Opcode == OPC_MorphNodeTo ? "Morphed" : "Created") 25802a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner << " node: "; Res->dump(CurDAG); errs() << "\n"); 25812a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25822a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If this was a MorphNodeTo then we're completely done! 25832a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (Opcode == OPC_MorphNodeTo) { 25842a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Update chain and flag uses. 25852a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner UpdateChainsAndFlags(NodeToMatch, InputChain, ChainNodesMatched, 258682dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner InputFlag, FlagResultNodesMatched, true); 258782dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner return Res; 25882a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 25892a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25902a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 25912a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 25922a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25932a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_MarkFlagResults: { 25942a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned NumNodes = MatcherTable[MatcherIndex++]; 25952a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 25962a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Read and remember all the flag-result nodes. 25972a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner for (unsigned i = 0; i != NumNodes; ++i) { 25982a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned RecNo = MatcherTable[MatcherIndex++]; 25992a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (RecNo & 128) 26002a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecNo = GetVBR(RecNo, MatcherTable, MatcherIndex); 26012a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26022a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(RecNo < RecordedNodes.size() && "Invalid CheckSame"); 26032a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner FlagResultNodesMatched.push_back(RecordedNodes[RecNo].getNode()); 26042a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 26052a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner continue; 26062a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 26072a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26082a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner case OPC_CompleteMatch: { 26092a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // The match has been completed, and any new nodes (if any) have been 26102a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // created. Patch up references to the matched dag to use the newly 26112a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // created nodes. 26122a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned NumResults = MatcherTable[MatcherIndex++]; 26132a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26142a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner for (unsigned i = 0; i != NumResults; ++i) { 26152a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned ResSlot = MatcherTable[MatcherIndex++]; 26162a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (ResSlot & 128) 26172a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner ResSlot = GetVBR(ResSlot, MatcherTable, MatcherIndex); 26182a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26192a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(ResSlot < RecordedNodes.size() && "Invalid CheckSame"); 26202a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner SDValue Res = RecordedNodes[ResSlot]; 26212a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26222a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // FIXME2: Eliminate this horrible hack by fixing the 'Gen' program 26232a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // after (parallel) on input patterns are removed. This would also 26242a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // allow us to stop encoding #results in OPC_CompleteMatch's table 26252a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // entry. 26262a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (NodeToMatch->getNumValues() <= i || 26272a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeToMatch->getValueType(i) == MVT::Other || 26282a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeToMatch->getValueType(i) == MVT::Flag) 26292a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner break; 26302a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert((NodeToMatch->getValueType(i) == Res.getValueType() || 26312a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeToMatch->getValueType(i) == MVT::iPTR || 26322a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Res.getValueType() == MVT::iPTR || 26332a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeToMatch->getValueType(i).getSizeInBits() == 26342a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner Res.getValueType().getSizeInBits()) && 26352a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner "invalid replacement"); 26362a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner CurDAG->ReplaceAllUsesOfValueWith(SDValue(NodeToMatch, i), Res); 26372a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 26382a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26392a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If the root node defines a flag, add it to the flag nodes to update 26402a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // list. 26412a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (NodeToMatch->getValueType(NodeToMatch->getNumValues()-1) == MVT::Flag) 26422a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner FlagResultNodesMatched.push_back(NodeToMatch); 26432a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26442a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Update chain and flag uses. 26452a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner UpdateChainsAndFlags(NodeToMatch, InputChain, ChainNodesMatched, 264682dd3d38d9b3bd49f19b8230f39d33e8ee6d4055Chris Lattner InputFlag, FlagResultNodesMatched, false); 26472a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26482a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner assert(NodeToMatch->use_empty() && 26492a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner "Didn't replace all uses of the node?"); 26502a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26512a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // FIXME: We just return here, which interacts correctly with SelectRoot 26522a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // above. We should fix this to not return an SDNode* anymore. 26532a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner return 0; 26542a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 26552a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 26562a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26572a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If the code reached this point, then the match failed. See if there is 26582a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // another child to try in the current 'Scope', otherwise pop it until we 26592a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // find a case to check. 26602a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner while (1) { 26612a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (MatchScopes.empty()) { 26622a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner CannotYetSelect(NodeToMatch); 26632a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner return 0; 26642a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 26652a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26662a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Restore the interpreter state back to the point where the scope was 26672a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // formed. 26682a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MatchScope &LastScope = MatchScopes.back(); 26692a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner RecordedNodes.resize(LastScope.NumRecordedNodes); 26702a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeStack.clear(); 26712a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NodeStack.append(LastScope.NodeStack.begin(), LastScope.NodeStack.end()); 26722a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner N = NodeStack.back(); 26732a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26742a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner DEBUG(errs() << " Match failed at index " << MatcherIndex 26752a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner << " continuing at " << LastScope.FailIndex << "\n"); 26762a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26772a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (LastScope.NumMatchedMemRefs != MatchedMemRefs.size()) 26782a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MatchedMemRefs.resize(LastScope.NumMatchedMemRefs); 26792a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MatcherIndex = LastScope.FailIndex; 26802a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26812a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputChain = LastScope.InputChain; 26822a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner InputFlag = LastScope.InputFlag; 26832a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (!LastScope.HasChainNodesMatched) 26842a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner ChainNodesMatched.clear(); 26852a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (!LastScope.HasFlagResultNodesMatched) 26862a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner FlagResultNodesMatched.clear(); 26872a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26882a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // Check to see what the offset is at the new MatcherIndex. If it is zero 26892a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // we have reached the end of this scope, otherwise we have another child 26902a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // in the current scope to try. 26912a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner unsigned NumToSkip = MatcherTable[MatcherIndex++]; 26922a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (NumToSkip & 128) 26932a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner NumToSkip = GetVBR(NumToSkip, MatcherTable, MatcherIndex); 26942a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 26952a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // If we have another child in this scope to match, update FailIndex and 26962a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // try it. 26972a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner if (NumToSkip != 0) { 26982a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner LastScope.FailIndex = MatcherIndex+NumToSkip; 26992a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner break; 27002a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 27012a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 27022a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // End of this scope, pop it and try the next child in the containing 27032a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner // scope. 27042a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner MatchScopes.pop_back(); 27052a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 27062a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner } 27072a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner} 27082a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 27092a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 27102a49d57d2d9dd19125a9ba302e883f6ba6c38b83Chris Lattner 2711eeb3a00b84b7767d236ec8cf0619b9217fc247b9Dan Gohmanvoid SelectionDAGISel::CannotYetSelect(SDNode *N) { 2712e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman std::string msg; 2713e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman raw_string_ostream Msg(msg); 2714e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman Msg << "Cannot yet select: "; 27152c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner 27162c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner if (N->getOpcode() != ISD::INTRINSIC_W_CHAIN && 27172c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner N->getOpcode() != ISD::INTRINSIC_WO_CHAIN && 27182c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner N->getOpcode() != ISD::INTRINSIC_VOID) { 27192c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner N->printrFull(Msg, CurDAG); 27202c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner } else { 27212c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner bool HasInputChain = N->getOperand(0).getValueType() == MVT::Other; 27222c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner unsigned iid = 27232c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner cast<ConstantSDNode>(N->getOperand(HasInputChain))->getZExtValue(); 27242c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner if (iid < Intrinsic::num_intrinsics) 27252c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner Msg << "intrinsic %" << Intrinsic::getName((Intrinsic::ID)iid); 27262c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner else if (const TargetIntrinsicInfo *TII = TM.getIntrinsicInfo()) 27272c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner Msg << "target intrinsic %" << TII->getName(iid); 27282c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner else 27292c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner Msg << "unknown intrinsic #" << iid; 27302c4afd1d8e3cd7cdf47a163deaf345a747541367Chris Lattner } 2731e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman llvm_report_error(Msg.str()); 2732e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman} 2733e1f188fe27050ec812e5b64cc996e6bb93300392Dan Gohman 27341997473cf72957d0e70322e2fe6fe2ab141c58a6Devang Patelchar SelectionDAGISel::ID = 0; 2735