SelectionDAGISel.cpp revision 298ebf2bd80ca415e58bbcbd9866ee58f167b620
11c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===-- SelectionDAGISel.cpp - Implement the SelectionDAGISel class -------===// 2edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 31c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// The LLVM Compiler Infrastructure 41c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 51c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// This file was developed by the LLVM research group and is distributed under 61c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// the University of Illinois Open Source 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" 151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SelectionDAGISel.h" 16a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng#include "llvm/CodeGen/ScheduleDAG.h" 17adf6a965a321372c640845407195594835921eb4Chris Lattner#include "llvm/CallingConv.h" 181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Constants.h" 191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/DerivedTypes.h" 201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Function.h" 2136ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner#include "llvm/GlobalVariable.h" 22ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner#include "llvm/InlineAsm.h" 231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instructions.h" 241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Intrinsics.h" 25b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner#include "llvm/CodeGen/IntrinsicLowering.h" 26b2efb853f00d45b1c8d57f92acd0028fbdeffda6Jim Laskey#include "llvm/CodeGen/MachineDebugInfo.h" 271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFunction.h" 281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFrameInfo.h" 291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineInstrBuilder.h" 301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SelectionDAG.h" 311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SSARegMap.h" 32fa57702388f139e964befecb4b98c7dfe836945fChris Lattner#include "llvm/Target/MRegisterInfo.h" 331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetData.h" 341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetFrameInfo.h" 351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetInstrInfo.h" 361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetLowering.h" 371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetMachine.h" 38495a0b51915eb763576874f29192820b731edc22Chris Lattner#include "llvm/Transforms/Utils/BasicBlockUtils.h" 397944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#include "llvm/Support/CommandLine.h" 407c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner#include "llvm/Support/MathExtras.h" 411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Support/Debug.h" 421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include <map> 434e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner#include <set> 441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include <iostream> 451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerusing namespace llvm; 461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 47da8abb02397d7cd62a1e16e7c534edd7096ac873Chris Lattner#ifndef NDEBUG 487944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattnerstatic cl::opt<bool> 49a9c2091cd38e401c846391c9951ff416e709b65eEvan ChengViewISelDAGs("view-isel-dags", cl::Hidden, 50a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng cl::desc("Pop up a window to show isel dags as they are selected")); 51a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengstatic cl::opt<bool> 52a9c2091cd38e401c846391c9951ff416e709b65eEvan ChengViewSchedDAGs("view-sched-dags", cl::Hidden, 53a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng cl::desc("Pop up a window to show sched dags as they are processed")); 547944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#else 55a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengstatic const bool ViewISelDAGs = 0; 56a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengstatic const bool ViewSchedDAGs = 0; 577944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#endif 587944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner 594ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Chengnamespace { 604ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng cl::opt<SchedHeuristics> 614ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng ISHeuristic( 624ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "sched", 634ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng cl::desc("Choose scheduling style"), 643f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng cl::init(defaultScheduling), 654ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng cl::values( 663f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng clEnumValN(defaultScheduling, "default", 673f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng "Target preferred scheduling style"), 684ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng clEnumValN(noScheduling, "none", 6917d52f723421ce28d1b9fe2fc058366ed43ec094Jim Laskey "No scheduling: breadth first sequencing"), 704ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng clEnumValN(simpleScheduling, "simple", 714ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "Simple two pass scheduling: minimize critical path " 724ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "and maximize processor utilization"), 734ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng clEnumValN(simpleNoItinScheduling, "simple-noitin", 744ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "Simple two pass scheduling: Same as simple " 754ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng "except using generic latency"), 763f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng clEnumValN(listSchedulingBURR, "list-burr", 77f0f9c90204c650b9f3c3feb02ccfcb1e40c6acddEvan Cheng "Bottom up register reduction list scheduling"), 784ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng clEnumValEnd)); 794ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng} // namespace 804ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng 814ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng 821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnernamespace llvm { 831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner //===--------------------------------------------------------------------===// 841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// FunctionLoweringInfo - This contains information that is global to a 851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// function that is used when lowering a region of the function. 86f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner class FunctionLoweringInfo { 87f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner public: 881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TargetLowering &TLI; 891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Function &Fn; 901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction &MF; 911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SSARegMap *RegMap; 921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo(TargetLowering &TLI, Function &Fn,MachineFunction &MF); 941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// MBBMap - A mapping from LLVM basic blocks to their machine code entry. 961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const BasicBlock*, MachineBasicBlock *> MBBMap; 971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// ValueMap - Since we emit code for the function a basic block at a time, 991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// we must remember which virtual registers hold the values for 1001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// cross-basic-block values. 1011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, unsigned> ValueMap; 1021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// StaticAllocaMap - Keep track of frame indices for fixed sized allocas in 1041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// the entry block. This allows the allocas to be efficiently referenced 1051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// anywhere in the function. 1061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const AllocaInst*, int> StaticAllocaMap; 1071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned MakeReg(MVT::ValueType VT) { 1091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return RegMap->createVirtualRegister(TLI.getRegClassFor(VT)); 1101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 111edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned CreateRegForValue(const Value *V) { 1131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType VT = TLI.getValueType(V->getType()); 1141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // The common case is that we will only create one register for this 1151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // value. If we have that case, create and return the virtual register. 1161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned NV = TLI.getNumElements(VT); 117fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner if (NV == 1) { 118fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner // If we are promoting this value, pick the next largest supported type. 11998e5c0e5e4c5be1b531d287d0a1373a62fe562e2Chris Lattner return MakeReg(TLI.getTypeToTransformTo(VT)); 120fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner } 121edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this value is represented with multiple target registers, make sure 1231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // to create enough consequtive registers of the right (smaller) type. 1241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned NT = VT-1; // Find the type to use. 1251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner while (TLI.getNumElements((MVT::ValueType)NT) != 1) 1261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner --NT; 127edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned R = MakeReg((MVT::ValueType)NT); 1291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 1; i != NV; ++i) 1301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MakeReg((MVT::ValueType)NT); 1311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return R; 1321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 133edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned InitializeRegForValue(const Value *V) { 1351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned &R = ValueMap[V]; 1361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(R == 0 && "Already initialized this value register!"); 1371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return R = CreateRegForValue(V); 1381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner }; 1401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// isUsedOutsideOfDefiningBlock - Return true if this instruction is used by 1431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// PHI nodes or outside of the basic block that defines it. 1441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerstatic bool isUsedOutsideOfDefiningBlock(Instruction *I) { 1451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (isa<PHINode>(I)) return true; 1461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *BB = I->getParent(); 1471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E; ++UI) 1481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (cast<Instruction>(*UI)->getParent() != BB || isa<PHINode>(*UI)) 1491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 1501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return false; 1511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 153bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner/// isOnlyUsedInEntryBlock - If the specified argument is only used in the 154bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner/// entry block, return true. 155bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattnerstatic bool isOnlyUsedInEntryBlock(Argument *A) { 156bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner BasicBlock *Entry = A->getParent()->begin(); 157bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (Value::use_iterator UI = A->use_begin(), E = A->use_end(); UI != E; ++UI) 158bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (cast<Instruction>(*UI)->getParent() != Entry) 159bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner return false; // Use not in entry block. 160bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner return true; 161bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner} 162bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 1631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris LattnerFunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli, 164edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman Function &fn, MachineFunction &mf) 1651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), Fn(fn), MF(mf), RegMap(MF.getSSARegMap()) { 1661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 167bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Create a vreg for each argument register that is not dead and is used 168bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // outside of the entry block for the function. 16916ce0df92717cd1474029d87efe596d000dc2caaChris Lattner for (Function::arg_iterator AI = Fn.arg_begin(), E = Fn.arg_end(); 17016ce0df92717cd1474029d87efe596d000dc2caaChris Lattner AI != E; ++AI) 171bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (!isOnlyUsedInEntryBlock(AI)) 172bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner InitializeRegForValue(AI); 1731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 174bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Initialize the mapping of values to registers. This is only set up for 175bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // instruction values that are used outside of the block that defines 176bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // them. 1772aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen Function::iterator BB = Fn.begin(), EB = Fn.end(); 1781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 1791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (AllocaInst *AI = dyn_cast<AllocaInst>(I)) 1801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (ConstantUInt *CUI = dyn_cast<ConstantUInt>(AI->getArraySize())) { 1811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = AI->getAllocatedType(); 1821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 183ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned Align = 184ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman std::max((unsigned)TLI.getTargetData().getTypeAlignment(Ty), 185ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman AI->getAlignment()); 186a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner 187a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // If the alignment of the value is smaller than the size of the value, 188a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // and if the size of the value is particularly small (<= 8 bytes), 189a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // round up to the size of the value for potentially better performance. 190a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // 191a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // FIXME: This could be made better with a preferred alignment hook in 192a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // TargetData. It serves primarily to 8-byte align doubles for X86. 193a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner if (Align < TySize && TySize <= 8) Align = TySize; 1942dfa8192abaad8a3c29132dba50e8b85218e918cChris Lattner TySize *= CUI->getValue(); // Get total allocated size. 195d222f6ab67472fa2b2e211172a11b43905aa9445Chris Lattner if (TySize == 0) TySize = 1; // Don't create zero-sized stack objects. 1961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner StaticAllocaMap[AI] = 197f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner MF.getFrameInfo()->CreateStackObject((unsigned)TySize, Align); 1981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2002aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (; BB != EB; ++BB) 2012aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 2021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!I->use_empty() && isUsedOutsideOfDefiningBlock(I)) 2031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!isa<AllocaInst>(I) || 2041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner !StaticAllocaMap.count(cast<AllocaInst>(I))) 2051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InitializeRegForValue(I); 2061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create an initial MachineBasicBlock for each LLVM BasicBlock in F. This 2081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // also creates the initial PHI MachineInstrs, though none of the input 2091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // operands are populated. 2102aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BB = Fn.begin(), EB = Fn.end(); BB != EB; ++BB) { 2111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *MBB = new MachineBasicBlock(BB); 2121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MBBMap[BB] = MBB; 2131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MF.getBasicBlockList().push_back(MBB); 2141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create Machine PHI nodes for LLVM PHI nodes, lowering them as 2161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // appropriate. 2171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 2181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(); 219f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 220f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 221f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 222f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 223f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned PHIReg = ValueMap[PN]; 224f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner assert(PHIReg &&"PHI node does not have an assigned virtual register!"); 225f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0; i != NumElements; ++i) 226f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner BuildMI(MBB, TargetInstrInfo::PHI, PN->getNumOperands(), PHIReg+i); 227f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 2281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 2341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// SelectionDAGLowering - This is the common target-independent lowering 2351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// implementation that is parameterized by a TargetLowering object. 2361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// Also, targets can overload any lowering method. 2371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// 2381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnernamespace llvm { 2391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerclass SelectionDAGLowering { 2401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *CurMBB; 2411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, SDOperand> NodeMap; 2431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 244d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// PendingLoads - Loads are not emitted to the program immediately. We bunch 245d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// them up and then emit token factor nodes when possible. This allows us to 246d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// get simple disambiguation between loads without worrying about alias 247d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// analysis. 248d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner std::vector<SDOperand> PendingLoads; 249d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 2501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerpublic: 2511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // TLI - This is information that describes the available target features we 2521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // need for lowering. This indicates when operations are unavailable, 2531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // implemented with a libcall, etc. 2541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TargetLowering &TLI; 2551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAG &DAG; 2561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const TargetData &TD; 2571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// FuncInfo - Information about the function as a whole. 2591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// 2601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo; 2611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAGLowering(SelectionDAG &dag, TargetLowering &tli, 263edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman FunctionLoweringInfo &funcinfo) 2641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), DAG(dag), TD(DAG.getTarget().getTargetData()), 2651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo(funcinfo) { 2661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 268a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// getRoot - Return the current virtual root of the Selection DAG. 269a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// 270a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner SDOperand getRoot() { 271d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.empty()) 272d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return DAG.getRoot(); 273edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 274d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.size() == 1) { 275d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = PendingLoads[0]; 276d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 277d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 278d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 279d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 280d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 281d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Otherwise, we have to make a token factor node. 282d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = DAG.getNode(ISD::TokenFactor, MVT::Other, PendingLoads); 283d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 284d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 285d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 286a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner } 287a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 2881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(Instruction &I) { visit(I.getOpcode(), I); } 2891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(unsigned Opcode, User &I) { 2911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner switch (Opcode) { 2921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner default: assert(0 && "Unknown instruction type encountered!"); 2931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 2941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Build the switch statement using the Instruction.def file. 2951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#define HANDLE_INST(NUM, OPCODE, CLASS) \ 2961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case Instruction::OPCODE:return visit##OPCODE((CLASS&)I); 2971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instruction.def" 2981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void setCurrentBasicBlock(MachineBasicBlock *MBB) { CurMBB = MBB; } 3021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand getIntPtrConstant(uint64_t Val) { 3051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return DAG.getConstant(Val, TLI.getPointerTy()); 3061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand getValue(const Value *V) { 3091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand &N = NodeMap[V]; 3101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (N.Val) return N; 3111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3128cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman const Type *VTy = V->getType(); 3138cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman MVT::ValueType VT = TLI.getValueType(VTy); 3141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) 3151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { 3161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner visit(CE->getOpcode(), *CE); 3171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(N.Val && "visit didn't populate the ValueMap!"); 3181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N; 3191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (GlobalValue *GV = dyn_cast<GlobalValue>(C)) { 3201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getGlobalAddress(GV, VT); 3211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (isa<ConstantPointerNull>(C)) { 3221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstant(0, TLI.getPointerTy()); 3231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (isa<UndefValue>(C)) { 324b882752bd04602249d391699dc7183de007f8964Nate Begeman return N = DAG.getNode(ISD::UNDEF, VT); 3251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) { 3261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstantFP(CFP->getValue(), VT); 3278cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman } else if (const PackedType *PTy = dyn_cast<PackedType>(VTy)) { 3288cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman unsigned NumElements = PTy->getNumElements(); 3298cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 3308cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements); 3318cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman 3328cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // Now that we know the number and type of the elements, push a 3338cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // Constant or ConstantFP node onto the ops list for each element of 3348cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // the packed constant. 3358cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman std::vector<SDOperand> Ops; 3363b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner if (ConstantPacked *CP = dyn_cast<ConstantPacked>(C)) { 3373b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner if (MVT::isFloatingPoint(PVT)) { 3383b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner for (unsigned i = 0; i != NumElements; ++i) { 3393b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner const ConstantFP *El = cast<ConstantFP>(CP->getOperand(i)); 3403b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Ops.push_back(DAG.getConstantFP(El->getValue(), PVT)); 3413b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } 3423b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } else { 3433b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner for (unsigned i = 0; i != NumElements; ++i) { 3443b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner const ConstantIntegral *El = 3453b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner cast<ConstantIntegral>(CP->getOperand(i)); 3463b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Ops.push_back(DAG.getConstant(El->getRawValue(), PVT)); 3473b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } 3483b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } 3493b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner } else { 3503b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner assert(isa<ConstantAggregateZero>(C) && "Unknown packed constant!"); 3513b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner SDOperand Op; 3528cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman if (MVT::isFloatingPoint(PVT)) 3533b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Op = DAG.getConstantFP(0, PVT); 3548cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman else 3553b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Op = DAG.getConstant(0, PVT); 3563b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner Ops.assign(NumElements, Op); 3578cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman } 3583b841e9f52611c1f92c60f979c775adf2c1fe22dChris Lattner 3598cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // Handle the case where we have a 1-element vector, in which 3608cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman // case we want to immediately turn it into a scalar constant. 361cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman if (Ops.size() == 1) { 3628cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman return N = Ops[0]; 363cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman } else if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) { 364cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman return N = DAG.getNode(ISD::ConstantVec, TVT, Ops); 365cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman } else { 366cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman // If the packed type isn't legal, then create a ConstantVec node with 367cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman // generic Vector type instead. 368cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman return N = DAG.getNode(ISD::ConstantVec, MVT::Vector, Ops); 369cc827e60b67b2cbcf08a37b119e68081e4171b8aNate Begeman } 3701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 3711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Canonicalize all constant ints to be unsigned. 3721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstant(cast<ConstantIntegral>(C)->getRawValue(),VT); 3731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (const AllocaInst *AI = dyn_cast<AllocaInst>(V)) { 3761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const AllocaInst*, int>::iterator SI = 3771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo.StaticAllocaMap.find(AI); 3781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (SI != FuncInfo.StaticAllocaMap.end()) 3791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return DAG.getFrameIndex(SI->second, TLI.getPointerTy()); 3801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, unsigned>::const_iterator VMI = 3831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo.ValueMap.find(V); 3841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(VMI != FuncInfo.ValueMap.end() && "Value not in map!"); 385c8ea3c47103656a0924909f41651bf5d396c26cdChris Lattner 386d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner unsigned InReg = VMI->second; 387d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 388d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // If this type is not legal, make it so now. 389d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(VT); 390d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 391d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getCopyFromReg(DAG.getEntryNode(), InReg, DestVT); 392d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (DestVT < VT) { 393d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // Source must be expanded. This input value is actually coming from the 394d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // register pair VMI->second and VMI->second+1. 395d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::BUILD_PAIR, VT, N, 396d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner DAG.getCopyFromReg(DAG.getEntryNode(), InReg+1, DestVT)); 397d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else { 398d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (DestVT > VT) { // Promotion case 399d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (MVT::isFloatingPoint(VT)) 400d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::FP_ROUND, VT, N); 401d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner else 402d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::TRUNCATE, VT, N); 403d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 404d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 405d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 406d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return N; 4071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const SDOperand &setValue(const Value *V, SDOperand NewN) { 4101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand &N = NodeMap[V]; 4111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(N.Val == 0 && "Already set a value for this node!"); 4121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = NewN; 4131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4144e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 4154e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner unsigned GetAvailableRegister(bool OutReg, bool InReg, 4164e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner const std::vector<unsigned> &RegChoices, 4174e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::set<unsigned> &OutputRegs, 4184e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::set<unsigned> &InputRegs); 4191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Terminator instructions. 4211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRet(ReturnInst &I); 4221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitBr(BranchInst &I); 4231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnreachable(UnreachableInst &I) { /* noop */ } 4241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // These all get lowered before this pass. 426c0f4cd99316b0b9ae10b5774d1036d74d838f0afRobert Bocchino void visitExtractElement(ExtractElementInst &I) { assert(0 && "TODO"); } 4274eb2e3a6f45e6f0a4a8f0002918f8d14c34169c1Robert Bocchino void visitInsertElement(InsertElementInst &I) { assert(0 && "TODO"); } 4281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSwitch(SwitchInst &I) { assert(0 && "TODO"); } 4291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitInvoke(InvokeInst &I) { assert(0 && "TODO"); } 4301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnwind(UnwindInst &I) { assert(0 && "TODO"); } 4311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 4335fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitBinary(User &I, unsigned IntOp, unsigned FPOp, unsigned VecOp); 434e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman void visitShift(User &I, unsigned Opcode); 4355fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitAdd(User &I) { 4365fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, ISD::ADD, ISD::FADD, ISD::VADD); 43701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 438b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner void visitSub(User &I); 4395fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitMul(User &I) { 4405fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, ISD::MUL, ISD::FMUL, ISD::VMUL); 44101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 4421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitDiv(User &I) { 44301b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 4445fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, Ty->isSigned() ? ISD::SDIV : ISD::UDIV, ISD::FDIV, 0); 4451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRem(User &I) { 44701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 4485fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, Ty->isSigned() ? ISD::SREM : ISD::UREM, ISD::FREM, 0); 4491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4505fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitAnd(User &I) { visitBinary(I, ISD::AND, 0, 0); } 4515fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitOr (User &I) { visitBinary(I, ISD::OR, 0, 0); } 4525fbb5d2459a5410590f285250faa604576308a93Nate Begeman void visitXor(User &I) { visitBinary(I, ISD::XOR, 0, 0); } 453e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman void visitShl(User &I) { visitShift(I, ISD::SHL); } 454e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman void visitShr(User &I) { 455e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman visitShift(I, I.getType()->isUnsigned() ? ISD::SRL : ISD::SRA); 4561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetCC(User &I, ISD::CondCode SignedOpc, ISD::CondCode UnsignedOpc); 4591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetEQ(User &I) { visitSetCC(I, ISD::SETEQ, ISD::SETEQ); } 4601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetNE(User &I) { visitSetCC(I, ISD::SETNE, ISD::SETNE); } 4611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLE(User &I) { visitSetCC(I, ISD::SETLE, ISD::SETULE); } 4621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGE(User &I) { visitSetCC(I, ISD::SETGE, ISD::SETUGE); } 4631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLT(User &I) { visitSetCC(I, ISD::SETLT, ISD::SETULT); } 4641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGT(User &I) { visitSetCC(I, ISD::SETGT, ISD::SETUGT); } 4651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitGetElementPtr(User &I); 4671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCast(User &I); 4681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSelect(User &I); 4691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 4701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitMalloc(MallocInst &I); 4721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitFree(FreeInst &I); 4731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitAlloca(AllocaInst &I); 4741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitLoad(LoadInst &I); 4751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitStore(StoreInst &I); 4761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitPHI(PHINode &I) { } // PHI nodes are handled specially. 4771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCall(CallInst &I); 478ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner void visitInlineAsm(CallInst &I); 479c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner const char *visitIntrinsicCall(CallInst &I, unsigned Intrinsic); 4801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAStart(CallInst &I); 4821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAArg(VAArgInst &I); 4831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAEnd(CallInst &I); 4841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVACopy(CallInst &I); 48539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner void visitFrameReturnAddress(CallInst &I, bool isFrameAddress); 4861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4877041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner void visitMemIntrinsic(CallInst &I, unsigned Op); 4881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp1(Instruction &I) { 4901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp1 should not exist at instruction selection time!"); 4911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 4921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp2(Instruction &I) { 4941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp2 should not exist at instruction selection time!"); 4951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 4961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner}; 4981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} // end namespace llvm 4991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitRet(ReturnInst &I) { 5011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getNumOperands() == 0) { 502a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, getRoot())); 5031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; 5041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 505ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman std::vector<SDOperand> NewValues; 506ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman NewValues.push_back(getRoot()); 507ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) { 508ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman SDOperand RetOp = getValue(I.getOperand(i)); 509ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman 510ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman // If this is an integer return value, we need to promote it ourselves to 511ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman // the full width of a register, since LegalizeOp will use ANY_EXTEND rather 512ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman // than sign/zero. 513ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman if (MVT::isInteger(RetOp.getValueType()) && 514ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman RetOp.getValueType() < MVT::i64) { 515ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman MVT::ValueType TmpVT; 516ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman if (TLI.getTypeAction(MVT::i32) == TargetLowering::Promote) 517ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman TmpVT = TLI.getTypeToTransformTo(MVT::i32); 518ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman else 519ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman TmpVT = MVT::i32; 5201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 521ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman if (I.getOperand(i)->getType()->isSigned()) 522ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman RetOp = DAG.getNode(ISD::SIGN_EXTEND, TmpVT, RetOp); 523ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman else 524ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman RetOp = DAG.getNode(ISD::ZERO_EXTEND, TmpVT, RetOp); 525ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman } 526ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman NewValues.push_back(RetOp); 5271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 528ee625573b5b39b91441fc6ea23f3ba415abdc71fNate Begeman DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, NewValues)); 5291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitBr(BranchInst &I) { 5321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Update machine-CFG edges. 5331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[I.getSuccessor(0)]; 5341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Figure out which block is immediately after the current one. 5361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *NextBlock = 0; 5371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction::iterator BBI = CurMBB; 5381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (++BBI != CurMBB->getParent()->end()) 5391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner NextBlock = BBI; 5401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.isUnconditional()) { 5421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is not a fall-through branch, emit the branch. 5431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ0MBB != NextBlock) 544a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BR, MVT::Other, getRoot(), 545dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman DAG.getBasicBlock(Succ0MBB))); 5461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 5471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ1MBB = FuncInfo.MBBMap[I.getSuccessor(1)]; 5481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getCondition()); 5501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ1MBB == NextBlock) { 5511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is false, fall through. This means we should branch 5521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // if the condition is true to Succ #0. 553a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 554dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ0MBB))); 5551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (Succ0MBB == NextBlock) { 5561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is true, fall through. This means we should branch if 5571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the condition is false to Succ #1. Invert the condition first. 5581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand True = DAG.getConstant(1, Cond.getValueType()); 5591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Cond = DAG.getNode(ISD::XOR, Cond.getValueType(), Cond, True); 560a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 561dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ1MBB))); 5621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 563e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner std::vector<SDOperand> Ops; 564e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(getRoot()); 565298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // If the false case is the current basic block, then this is a self 566298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // loop. We do not want to emit "Loop: ... brcond Out; br Loop", as it 567298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // adds an extra instruction in the loop. Instead, invert the 568298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng // condition and emit "Loop: ... br!cond Loop; br Out. 569298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng if (CurMBB == Succ1MBB) { 570298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng std::swap(Succ0MBB, Succ1MBB); 571298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng SDOperand True = DAG.getConstant(1, Cond.getValueType()); 572298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng Cond = DAG.getNode(ISD::XOR, Cond.getValueType(), Cond, True); 573298ebf2bd80ca415e58bbcbd9866ee58f167b620Evan Cheng } 574e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(Cond); 575e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(DAG.getBasicBlock(Succ0MBB)); 576e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(DAG.getBasicBlock(Succ1MBB)); 577e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCONDTWOWAY, MVT::Other, Ops)); 5781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 582b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattnervoid SelectionDAGLowering::visitSub(User &I) { 583b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner // -0.0 - X --> fneg 58401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (I.getType()->isFloatingPoint()) { 58501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (ConstantFP *CFP = dyn_cast<ConstantFP>(I.getOperand(0))) 58601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (CFP->isExactlyValue(-0.0)) { 58701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 58801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner setValue(&I, DAG.getNode(ISD::FNEG, Op2.getValueType(), Op2)); 58901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner return; 59001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 59101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 5925fbb5d2459a5410590f285250faa604576308a93Nate Begeman visitBinary(I, ISD::SUB, ISD::FSUB, ISD::VSUB); 593b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner} 594b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner 5955fbb5d2459a5410590f285250faa604576308a93Nate Begemanvoid SelectionDAGLowering::visitBinary(User &I, unsigned IntOp, unsigned FPOp, 5965fbb5d2459a5410590f285250faa604576308a93Nate Begeman unsigned VecOp) { 5975fbb5d2459a5410590f285250faa604576308a93Nate Begeman const Type *Ty = I.getType(); 5981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 5991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 6002c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 601b67eb9131c5c04d2e55c6b587fde954619feceafChris Lattner if (Ty->isIntegral()) { 6025fbb5d2459a5410590f285250faa604576308a93Nate Begeman setValue(&I, DAG.getNode(IntOp, Op1.getValueType(), Op1, Op2)); 6035fbb5d2459a5410590f285250faa604576308a93Nate Begeman } else if (Ty->isFloatingPoint()) { 6045fbb5d2459a5410590f285250faa604576308a93Nate Begeman setValue(&I, DAG.getNode(FPOp, Op1.getValueType(), Op1, Op2)); 6055fbb5d2459a5410590f285250faa604576308a93Nate Begeman } else { 6065fbb5d2459a5410590f285250faa604576308a93Nate Begeman const PackedType *PTy = cast<PackedType>(Ty); 6074ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman unsigned NumElements = PTy->getNumElements(); 6084ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 609f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements); 6104ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman 6114ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman // Immediately scalarize packed types containing only one element, so that 612f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // the Legalize pass does not have to deal with them. Similarly, if the 613f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // abstract vector is going to turn into one that the target natively 614f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // supports, generate that type now so that Legalize doesn't have to deal 615f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // with that either. These steps ensure that Legalize only has to handle 616f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman // vector types in its Expand case. 617f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman unsigned Opc = MVT::isFloatingPoint(PVT) ? FPOp : IntOp; 6184ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman if (NumElements == 1) { 6194ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman setValue(&I, DAG.getNode(Opc, PVT, Op1, Op2)); 620f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman } else if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) { 621f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman setValue(&I, DAG.getNode(Opc, TVT, Op1, Op2)); 6224ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman } else { 6234ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman SDOperand Num = DAG.getConstant(NumElements, MVT::i32); 6244ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman SDOperand Typ = DAG.getValueType(PVT); 625ab48be377298bd509427a29e174cf4e305138819Nate Begeman setValue(&I, DAG.getNode(VecOp, MVT::Vector, Op1, Op2, Num, Typ)); 6264ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman } 6275fbb5d2459a5410590f285250faa604576308a93Nate Begeman } 628e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman} 6292c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 630e21ea61588996609f827213a2701a204f2f13fb3Nate Begemanvoid SelectionDAGLowering::visitShift(User &I, unsigned Opcode) { 631e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman SDOperand Op1 = getValue(I.getOperand(0)); 632e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman SDOperand Op2 = getValue(I.getOperand(1)); 633e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman 634e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman Op2 = DAG.getNode(ISD::ANY_EXTEND, TLI.getShiftAmountTy(), Op2); 635e21ea61588996609f827213a2701a204f2f13fb3Nate Begeman 6361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(Opcode, Op1.getValueType(), Op1, Op2)); 6371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 6381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSetCC(User &I,ISD::CondCode SignedOpcode, 6401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode UnsignedOpcode) { 6411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 6421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 6431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode Opcode = SignedOpcode; 6441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getOperand(0)->getType()->isUnsigned()) 6451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Opcode = UnsignedOpcode; 6467cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, Op1, Op2, Opcode)); 6471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 6481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSelect(User &I) { 6501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getOperand(0)); 6511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand TrueVal = getValue(I.getOperand(1)); 6521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand FalseVal = getValue(I.getOperand(2)); 6531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(ISD::SELECT, TrueVal.getValueType(), Cond, 6541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TrueVal, FalseVal)); 6551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 6561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCast(User &I) { 6581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 6591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType SrcTy = TLI.getValueType(I.getOperand(0)->getType()); 6601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType DestTy = TLI.getValueType(I.getType()); 6611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (N.getValueType() == DestTy) { 6631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); // noop cast. 664ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner } else if (DestTy == MVT::i1) { 665ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner // Cast to bool is a comparison against zero, not truncation to zero. 666ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner SDOperand Zero = isInteger(SrcTy) ? DAG.getConstant(0, N.getValueType()) : 667ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner DAG.getConstantFP(0.0, N.getValueType()); 6687cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, N, Zero, ISD::SETNE)); 669ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else if (isInteger(SrcTy)) { 670ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (isInteger(DestTy)) { // Int -> Int cast 671ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (DestTy < SrcTy) // Truncating cast? 672ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::TRUNCATE, DestTy, N)); 673ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else if (I.getOperand(0)->getType()->isSigned()) 674ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::SIGN_EXTEND, DestTy, N)); 675ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 676ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::ZERO_EXTEND, DestTy, N)); 677ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // Int -> FP cast 678ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getOperand(0)->getType()->isSigned()) 679ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::SINT_TO_FP, DestTy, N)); 680ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 681ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::UINT_TO_FP, DestTy, N)); 682ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 6831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 684ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner assert(isFloatingPoint(SrcTy) && "Unknown value type!"); 685ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (isFloatingPoint(DestTy)) { // FP -> FP cast 686ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (DestTy < SrcTy) // Rounding cast? 687ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_ROUND, DestTy, N)); 688ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 689ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_EXTEND, DestTy, N)); 690ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // FP -> Int cast. 691ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getType()->isSigned()) 692ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_SINT, DestTy, N)); 693ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 694ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_UINT, DestTy, N)); 695ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 6961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 6981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitGetElementPtr(User &I) { 7001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 7011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getOperand(0)->getType(); 7021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *UIntPtrTy = TD.getIntPtrType(); 7031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (GetElementPtrInst::op_iterator OI = I.op_begin()+1, E = I.op_end(); 7051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner OI != E; ++OI) { 7061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Idx = *OI; 707c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (const StructType *StTy = dyn_cast<StructType>(Ty)) { 7081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned Field = cast<ConstantUInt>(Idx)->getValue(); 7091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Field) { 7101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // N = N + Offset 7111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t Offset = TD.getStructLayout(StTy)->MemberOffsets[Field]; 7121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, 713dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman getIntPtrConstant(Offset)); 7141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 7151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = StTy->getElementType(Field); 7161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 7171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = cast<SequentialType>(Ty)->getElementType(); 7187c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 7197c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If this is a constant subscript, handle it quickly. 7207c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 7217c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (CI->getRawValue() == 0) continue; 7227c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 7237c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner uint64_t Offs; 7247c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (ConstantSInt *CSI = dyn_cast<ConstantSInt>(CI)) 7257c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner Offs = (int64_t)TD.getTypeSize(Ty)*CSI->getValue(); 7267c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner else 7277c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner Offs = TD.getTypeSize(Ty)*cast<ConstantUInt>(CI)->getValue(); 7287c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, getIntPtrConstant(Offs)); 7297c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner continue; 7307c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner } 7317c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 7327c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // N = N + Idx * ElementSize; 7337c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner uint64_t ElementSize = TD.getTypeSize(Ty); 7347c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner SDOperand IdxN = getValue(Idx); 7357c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 7367c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If the index is smaller or larger than intptr_t, truncate or extend 7377c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // it. 7387c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (IdxN.getValueType() < N.getValueType()) { 7397c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (Idx->getType()->isSigned()) 7407c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::SIGN_EXTEND, N.getValueType(), IdxN); 7417c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner else 7427c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::ZERO_EXTEND, N.getValueType(), IdxN); 7437c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner } else if (IdxN.getValueType() > N.getValueType()) 7447c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::TRUNCATE, N.getValueType(), IdxN); 7457c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 7467c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If this is a multiply by a power of two, turn it into a shl 7477c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // immediately. This is a very common case. 7487c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (isPowerOf2_64(ElementSize)) { 7497c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner unsigned Amt = Log2_64(ElementSize); 7507c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::SHL, N.getValueType(), IdxN, 7516b2d69655ace2788b244c8a4ebcfb6f2a926ad92Chris Lattner DAG.getConstant(Amt, TLI.getShiftAmountTy())); 7521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); 7537c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner continue; 7541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 7557c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 7567c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner SDOperand Scale = getIntPtrConstant(ElementSize); 7577c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::MUL, N.getValueType(), IdxN, Scale); 7587c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); 7591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 7601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 7611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); 7621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitAlloca(AllocaInst &I) { 7651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is a fixed sized alloca in the entry block of the function, 7661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // allocate it statically on the stack. 7671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (FuncInfo.StaticAllocaMap.count(&I)) 7681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; // getValue will auto-populate this. 7691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getAllocatedType(); 7711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 772ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned Align = std::max((unsigned)TLI.getTargetData().getTypeAlignment(Ty), 773ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman I.getAlignment()); 7741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand AllocSize = getValue(I.getArraySize()); 77668cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 77768cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < AllocSize.getValueType()) 77868cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::TRUNCATE, IntPtr, AllocSize); 77968cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > AllocSize.getValueType()) 78068cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, AllocSize); 7811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 78268cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::MUL, IntPtr, AllocSize, 7831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(TySize)); 7841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle alignment. If the requested alignment is less than or equal to the 7861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment, ignore it and round the size of the allocation up to the 7871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment size. If the size is greater than the stack alignment, we 7881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // note this in the DYNAMIC_STACKALLOC node. 7891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned StackAlign = 7901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetMachine().getFrameInfo()->getStackAlignment(); 7911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Align <= StackAlign) { 7921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Align = 0; 7931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Add SA-1 to the size. 7941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::ADD, AllocSize.getValueType(), AllocSize, 7951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(StackAlign-1)); 7961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Mask out the low bits for alignment purposes. 7971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::AND, AllocSize.getValueType(), AllocSize, 7981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(~(uint64_t)(StackAlign-1))); 7991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 8001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 801adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<MVT::ValueType> VTs; 802adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(AllocSize.getValueType()); 803adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(MVT::Other); 804adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<SDOperand> Ops; 805adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getRoot()); 806adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(AllocSize); 807adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getIntPtrConstant(Align)); 808adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner SDOperand DSA = DAG.getNode(ISD::DYNAMIC_STACKALLOC, VTs, Ops); 8091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DAG.setRoot(setValue(&I, DSA).getValue(1)); 8101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Inform the Frame Information that we have just allocated a variable-sized 8121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // object. 8131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurMBB->getParent()->getFrameInfo()->CreateVariableSizedObject(); 8141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 81636ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner/// getStringValue - Turn an LLVM constant pointer that eventually points to a 81736ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner/// global into a string value. Return an empty string if we can't do it. 81836ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner/// 81974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Chengstatic std::string getStringValue(GlobalVariable *GV, unsigned Offset = 0) { 82074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) { 82174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng ConstantArray *Init = cast<ConstantArray>(GV->getInitializer()); 82274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (Init->isString()) { 82374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng std::string Result = Init->getAsString(); 82474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (Offset < Result.size()) { 82574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng // If we are pointing INTO The string, erase the beginning... 82674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Result.erase(Result.begin(), Result.begin()+Offset); 82774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng return Result; 82836ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner } 82936ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner } 83036ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner } 83136ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner return ""; 83236ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner} 8331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitLoad(LoadInst &I) { 8351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(0)); 836edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 837d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root; 838d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (I.isVolatile()) 839d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = getRoot(); 840d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else { 841d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Do not serialize non-volatile loads against each other. 842d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = DAG.getRoot(); 843d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 8445fbb5d2459a5410590f285250faa604576308a93Nate Begeman 8455fbb5d2459a5410590f285250faa604576308a93Nate Begeman const Type *Ty = I.getType(); 8465fbb5d2459a5410590f285250faa604576308a93Nate Begeman SDOperand L; 8475fbb5d2459a5410590f285250faa604576308a93Nate Begeman 8488cfa57b1b4eade4e0101195b2f94ab288cd03563Nate Begeman if (const PackedType *PTy = dyn_cast<PackedType>(Ty)) { 8494ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman unsigned NumElements = PTy->getNumElements(); 8504ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman MVT::ValueType PVT = TLI.getValueType(PTy->getElementType()); 851f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements); 8524ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman 8534ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman // Immediately scalarize packed types containing only one element, so that 8544ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman // the Legalize pass does not have to deal with them. 8554ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman if (NumElements == 1) { 8564ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman L = DAG.getLoad(PVT, Root, Ptr, DAG.getSrcValue(I.getOperand(0))); 857f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman } else if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) { 858f43a3ca26d7bf431be5cdfb5963350a158e840afNate Begeman L = DAG.getLoad(TVT, Root, Ptr, DAG.getSrcValue(I.getOperand(0))); 8594ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman } else { 8604ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman L = DAG.getVecLoad(NumElements, PVT, Root, Ptr, 8614ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman DAG.getSrcValue(I.getOperand(0))); 8624ef3b817fee7ea5be7219e00ab8e15976bfe279fNate Begeman } 8635fbb5d2459a5410590f285250faa604576308a93Nate Begeman } else { 8645fbb5d2459a5410590f285250faa604576308a93Nate Begeman L = DAG.getLoad(TLI.getValueType(Ty), Root, Ptr, 8655fbb5d2459a5410590f285250faa604576308a93Nate Begeman DAG.getSrcValue(I.getOperand(0))); 8665fbb5d2459a5410590f285250faa604576308a93Nate Begeman } 867d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner setValue(&I, L); 868d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 869d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (I.isVolatile()) 870d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(L.getValue(1)); 871d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else 872d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.push_back(L.getValue(1)); 8731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitStore(StoreInst &I) { 8771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *SrcV = I.getOperand(0); 8781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(SrcV); 8791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(1)); 880369e6db9b6033bb60519b0ad84afeacc9ec9b416Chris Lattner DAG.setRoot(DAG.getNode(ISD::STORE, MVT::Other, getRoot(), Src, Ptr, 88106ef88472f7bac3512e224974e87a0a456471b82Andrew Lenharth DAG.getSrcValue(I.getOperand(1)))); 8821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 884c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner/// visitIntrinsicCall - Lower the call to the specified intrinsic function. If 885c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner/// we want to emit this as a call to a named external function, return the name 886c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner/// otherwise lower it and return null. 887c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattnerconst char * 888c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris LattnerSelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) { 889c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner switch (Intrinsic) { 890c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::vastart: visitVAStart(I); return 0; 891c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::vaend: visitVAEnd(I); return 0; 892c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::vacopy: visitVACopy(I); return 0; 893c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::returnaddress: visitFrameReturnAddress(I, false); return 0; 894c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::frameaddress: visitFrameReturnAddress(I, true); return 0; 895c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::setjmp: 896c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return "_setjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 897c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner break; 898c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::longjmp: 899c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return "_longjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 900c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner break; 901c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::memcpy: visitMemIntrinsic(I, ISD::MEMCPY); return 0; 902c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::memset: visitMemIntrinsic(I, ISD::MEMSET); return 0; 903c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::memmove: visitMemIntrinsic(I, ISD::MEMMOVE); return 0; 904c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 905c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::readport: 906c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::readio: { 907c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner std::vector<MVT::ValueType> VTs; 908c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner VTs.push_back(TLI.getValueType(I.getType())); 909c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner VTs.push_back(MVT::Other); 910c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner std::vector<SDOperand> Ops; 911c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner Ops.push_back(getRoot()); 912c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner Ops.push_back(getValue(I.getOperand(1))); 913c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = DAG.getNode(Intrinsic == Intrinsic::readport ? 914c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner ISD::READPORT : ISD::READIO, VTs, Ops); 915c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 916c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, Tmp); 917c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner DAG.setRoot(Tmp.getValue(1)); 918c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 919c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 920c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::writeport: 921c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::writeio: 922c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner DAG.setRoot(DAG.getNode(Intrinsic == Intrinsic::writeport ? 923c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner ISD::WRITEPORT : ISD::WRITEIO, MVT::Other, 924c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getRoot(), getValue(I.getOperand(1)), 925c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(2)))); 926c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 927b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner 92886cb643801be1308ba1da7db774b64852a119e94Chris Lattner case Intrinsic::dbg_stoppoint: { 929b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (TLI.getTargetMachine().getIntrinsicLowering().EmitDebugFunctions()) 930b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return "llvm_debugger_stop"; 93136ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner 932ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey MachineDebugInfo *DebugInfo = DAG.getMachineDebugInfo(); 933ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey if (DebugInfo && DebugInfo->Verify(I.getOperand(4))) { 934ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey std::vector<SDOperand> Ops; 93536ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner 936ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey // Input Chain 937ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(getRoot()); 938ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 939ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey // line number 940ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(getValue(I.getOperand(2))); 941ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 942ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey // column 943ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(getValue(I.getOperand(3))); 944ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 945d96185aa62dacf5c75d889231a8ab2e0f1ceb073Jim Laskey DebugInfoDesc *DD = DebugInfo->getDescFor(I.getOperand(4)); 946ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey assert(DD && "Not a debug information descriptor"); 947ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey CompileUnitDesc *CompileUnit = dyn_cast<CompileUnitDesc>(DD); 948ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey assert(CompileUnit && "Not a compile unit"); 949ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(DAG.getString(CompileUnit->getFileName())); 950ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey Ops.push_back(DAG.getString(CompileUnit->getDirectory())); 951ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey 952ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey if (Ops.size() == 5) // Found filename/workingdir. 953ce72b1755f5993a42c2e04e32a93fa5228a285d4Jim Laskey DAG.setRoot(DAG.getNode(ISD::LOCATION, MVT::Other, Ops)); 95486cb643801be1308ba1da7db774b64852a119e94Chris Lattner } 95586cb643801be1308ba1da7db774b64852a119e94Chris Lattner 956d67b3a8bf75d4d3c50263960a9375e6856588f2cChris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 957b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 95836ce69195ed488034d0bb11180cc2ebd923679c8Chris Lattner } 959c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_region_start: 960b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (TLI.getTargetMachine().getIntrinsicLowering().EmitDebugFunctions()) 961b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return "llvm_dbg_region_start"; 962b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (I.getType() != Type::VoidTy) 963b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 964b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 965c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_region_end: 966b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (TLI.getTargetMachine().getIntrinsicLowering().EmitDebugFunctions()) 967b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return "llvm_dbg_region_end"; 968b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (I.getType() != Type::VoidTy) 969b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 970b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 971c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_func_start: 972b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (TLI.getTargetMachine().getIntrinsicLowering().EmitDebugFunctions()) 973b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return "llvm_dbg_subprogram"; 974b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner if (I.getType() != Type::VoidTy) 975b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 976b1a5a5c4c0182205b91b962def7b008228a1f7e6Chris Lattner return 0; 977c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::dbg_declare: 978c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (I.getType() != Type::VoidTy) 979c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 980c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 981c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 9820b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::isunordered_f32: 9830b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::isunordered_f64: 984c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1,getValue(I.getOperand(1)), 985c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(2)), ISD::SETUO)); 986c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 987c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 9880b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::sqrt_f32: 9890b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::sqrt_f64: 990c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::FSQRT, 991c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 992c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 993c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 994c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner case Intrinsic::pcmarker: { 995c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 996c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner DAG.setRoot(DAG.getNode(ISD::PCMARKER, MVT::Other, getRoot(), Tmp)); 997c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 998c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 9998b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth case Intrinsic::readcyclecounter: { 10008b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth std::vector<MVT::ValueType> VTs; 10018b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth VTs.push_back(MVT::i64); 10028b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth VTs.push_back(MVT::Other); 10038b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth std::vector<SDOperand> Ops; 10048b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth Ops.push_back(getRoot()); 10058b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth SDOperand Tmp = DAG.getNode(ISD::READCYCLECOUNTER, VTs, Ops); 10068b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth setValue(&I, Tmp); 10078b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth DAG.setRoot(Tmp.getValue(1)); 100851b8d54922350b7e1c2cd5a5183ef2c5f5d1b1d5Andrew Lenharth return 0; 10098b91c77385a055474d271aa8c10f0382fdeaafebAndrew Lenharth } 1010d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman case Intrinsic::bswap_i16: 1011d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman case Intrinsic::bswap_i32: 1012d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman case Intrinsic::bswap_i64: 1013d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman setValue(&I, DAG.getNode(ISD::BSWAP, 1014d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman getValue(I.getOperand(1)).getValueType(), 1015d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman getValue(I.getOperand(1)))); 1016d88fc03602947b5baa35c8b09fe8bcfa2b4a03c1Nate Begeman return 0; 10170b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i8: 10180b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i16: 10190b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i32: 10200b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::cttz_i64: 1021c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::CTTZ, 1022c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1023c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1024c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 10250b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i8: 10260b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i16: 10270b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i32: 10280b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctlz_i64: 1029c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::CTLZ, 1030c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1031c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1032c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 10330b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i8: 10340b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i16: 10350b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i32: 10360b118206bf3411722707f2e5cab8fd2eedcd50d6Reid Spencer case Intrinsic::ctpop_i64: 1037c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner setValue(&I, DAG.getNode(ISD::CTPOP, 1038c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)).getValueType(), 1039c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner getValue(I.getOperand(1)))); 1040c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1041140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner case Intrinsic::stacksave: { 1042140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner std::vector<MVT::ValueType> VTs; 1043140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner VTs.push_back(TLI.getPointerTy()); 1044140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner VTs.push_back(MVT::Other); 1045140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner std::vector<SDOperand> Ops; 1046140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner Ops.push_back(getRoot()); 1047140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner SDOperand Tmp = DAG.getNode(ISD::STACKSAVE, VTs, Ops); 1048140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner setValue(&I, Tmp); 1049140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner DAG.setRoot(Tmp.getValue(1)); 1050140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner return 0; 1051140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner } 105239a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner case Intrinsic::stackrestore: { 105339a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 105439a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner DAG.setRoot(DAG.getNode(ISD::STACKRESTORE, MVT::Other, getRoot(), Tmp)); 1055140d53c99c3a70b9d3858a3c87f8ecb098994748Chris Lattner return 0; 105639a17dd31ddc4af6067940cb31e2c7d380773478Chris Lattner } 1057ac22c83e6853c759a10eb7310b019b22e1d42d16Chris Lattner case Intrinsic::prefetch: 1058ac22c83e6853c759a10eb7310b019b22e1d42d16Chris Lattner // FIXME: Currently discarding prefetches. 1059ac22c83e6853c759a10eb7310b019b22e1d42d16Chris Lattner return 0; 1060c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner default: 1061c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner std::cerr << I; 1062c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner assert(0 && "This intrinsic is not implemented yet!"); 1063c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return 0; 1064c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 1065c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner} 1066c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 1067c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 10681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCall(CallInst &I) { 106964e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner const char *RenameFn = 0; 1070c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (Function *F = I.getCalledFunction()) { 1071c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (F->isExternal()) 1072c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (unsigned IID = F->getIntrinsicID()) { 1073c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner RenameFn = visitIntrinsicCall(I, IID); 1074c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (!RenameFn) 1075c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner return; 1076c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } else { // Not an LLVM intrinsic. 1077c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner const std::string &Name = F->getName(); 1078c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner if (Name[0] == 'f' && (Name == "fabs" || Name == "fabsf")) { 1079c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 1080c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 1081c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getType() == I.getOperand(1)->getType()) { 1082c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1083c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner setValue(&I, DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp)); 1084c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner return; 1085c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 1086c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } else if (Name[0] == 's' && (Name == "sin" || Name == "sinf")) { 1087f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 1088f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 108906a248c9b398049d41cf6dd1a3f9eecc75603401Chris Lattner I.getType() == I.getOperand(1)->getType()) { 1090c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1091f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FSIN, Tmp.getValueType(), Tmp)); 1092f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 1093f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 1094c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } else if (Name[0] == 'c' && (Name == "cos" || Name == "cosf")) { 1095f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 1096f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 109706a248c9b398049d41cf6dd1a3f9eecc75603401Chris Lattner I.getType() == I.getOperand(1)->getType()) { 1098c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner SDOperand Tmp = getValue(I.getOperand(1)); 1099f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FCOS, Tmp.getValueType(), Tmp)); 1100f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 1101f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 1102f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 1103c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 1104ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner } else if (isa<InlineAsm>(I.getOperand(0))) { 1105ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner visitInlineAsm(I); 1106ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner return; 1107c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner } 1108edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 110964e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner SDOperand Callee; 111064e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner if (!RenameFn) 111164e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = getValue(I.getOperand(0)); 111264e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner else 111364e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = DAG.getExternalSymbol(RenameFn, TLI.getPointerTy()); 11141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 1115c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner Args.reserve(I.getNumOperands()); 11161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i) { 11171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Arg = I.getOperand(i); 11181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand ArgNode = getValue(Arg); 11191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(ArgNode, Arg->getType())); 11201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1121edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 11228e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const PointerType *PT = cast<PointerType>(I.getCalledValue()->getType()); 11238e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const FunctionType *FTy = cast<FunctionType>(PT->getElementType()); 1124edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1125cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 11269092fa310c8b2b1645b0d448c4c34b1e8ddc131dChris Lattner TLI.LowerCallTo(getRoot(), I.getType(), FTy->isVarArg(), I.getCallingConv(), 1127adf6a965a321372c640845407195594835921eb4Chris Lattner I.isTailCall(), Callee, Args, DAG); 11281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getType() != Type::VoidTy) 1129cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); 1130cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 11311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 11321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11334e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner/// GetAvailableRegister - Pick a register from RegChoices that is available 11344e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner/// for input and/or output as specified by isOutReg/isInReg. If an allocatable 11354e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner/// register is found, it is returned and added to the specified set of used 11364e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner/// registers. If not, zero is returned. 11374e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattnerunsigned SelectionDAGLowering:: 11384e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris LattnerGetAvailableRegister(bool isOutReg, bool isInReg, 11394e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner const std::vector<unsigned> &RegChoices, 11404e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::set<unsigned> &OutputRegs, 11414e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::set<unsigned> &InputRegs) { 11424e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner const MRegisterInfo *MRI = DAG.getTarget().getRegisterInfo(); 11434e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner MachineFunction &MF = *CurMBB->getParent(); 11444e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner for (unsigned i = 0, e = RegChoices.size(); i != e; ++i) { 11454e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner unsigned Reg = RegChoices[i]; 11464e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // See if this register is available. 11474e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner if (isOutReg && OutputRegs.count(Reg)) continue; // Already used. 11484e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner if (isInReg && InputRegs.count(Reg)) continue; // Already used. 11494e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 11504e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // Check to see if this register is allocatable (i.e. don't give out the 11514e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // stack pointer). 11524e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner bool Found = false; 11534e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner for (MRegisterInfo::regclass_iterator RC = MRI->regclass_begin(), 11544e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner E = MRI->regclass_end(); !Found && RC != E; ++RC) { 11554e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // NOTE: This isn't ideal. In particular, this might allocate the 11564e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // frame pointer in functions that need it (due to them not being taken 11574e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // out of allocation, because a variable sized allocation hasn't been seen 11584e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // yet). This is a slight code pessimization, but should still work. 11594e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner for (TargetRegisterClass::iterator I = (*RC)->allocation_order_begin(MF), 11604e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner E = (*RC)->allocation_order_end(MF); I != E; ++I) 11614e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner if (*I == Reg) { 11624e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner Found = true; 11634e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner break; 11644e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 11654e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 11664e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner if (!Found) continue; 11674e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 11684e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // Okay, this register is good, return it. 11694e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner if (isOutReg) OutputRegs.insert(Reg); // Mark used. 11704e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner if (isInReg) InputRegs.insert(Reg); // Mark used. 11714e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner return Reg; 11724e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 11734e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner return 0; 11744e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner} 11754e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 1176ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner/// visitInlineAsm - Handle a call to an InlineAsm object. 1177ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner/// 1178ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattnervoid SelectionDAGLowering::visitInlineAsm(CallInst &I) { 1179ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner InlineAsm *IA = cast<InlineAsm>(I.getOperand(0)); 1180ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1181ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner SDOperand AsmStr = DAG.getTargetExternalSymbol(IA->getAsmString().c_str(), 1182ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner MVT::Other); 1183ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1184ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // Note, we treat inline asms both with and without side-effects as the same. 1185ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // If an inline asm doesn't have side effects and doesn't access memory, we 1186ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // could not choose to not chain it. 1187ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner bool hasSideEffects = IA->hasSideEffects(); 1188ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 11892cc2f66c25d9576743026688fdae5ed402726532Chris Lattner std::vector<InlineAsm::ConstraintInfo> Constraints = IA->ParseConstraints(); 1190ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1191ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner /// AsmNodeOperands - A list of pairs. The first element is a register, the 1192ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner /// second is a bitfield where bit #0 is set if it is a use and bit #1 is set 1193ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner /// if it is a def of that register. 1194ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner std::vector<SDOperand> AsmNodeOperands; 1195ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner AsmNodeOperands.push_back(SDOperand()); // reserve space for input chain 1196ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner AsmNodeOperands.push_back(AsmStr); 1197ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1198ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner SDOperand Chain = getRoot(); 1199ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner SDOperand Flag; 1200ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 12016656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Loop over all of the inputs, copying the operand values into the 12026656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // appropriate registers and processing the output regs. 12036656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner unsigned RetValReg = 0; 12046656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner std::vector<std::pair<unsigned, Value*> > IndirectStoresToEmit; 12056656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner unsigned OpNum = 1; 12066656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner bool FoundOutputConstraint = false; 12074e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 12084e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // We fully assign registers here at isel time. This is not optimal, but 12094e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // should work. For register classes that correspond to LLVM classes, we 12104e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // could let the LLVM RA do its thing, but we currently don't. Do a prepass 12114e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // over the constraints, collecting fixed registers that we know we can't use. 12124e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::set<unsigned> OutputRegs, InputRegs; 12134e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner for (unsigned i = 0, e = Constraints.size(); i != e; ++i) { 12144e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner assert(Constraints[i].Codes.size() == 1 && "Only handles one code so far!"); 12154e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::string &ConstraintCode = Constraints[i].Codes[0]; 12162223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner 12174e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner std::vector<unsigned> Regs = 12184e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner TLI.getRegForInlineAsmConstraint(ConstraintCode); 12194e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner if (Regs.size() != 1) continue; // Not assigned a fixed reg. 12204e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner unsigned TheReg = Regs[0]; 12214e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 12224e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner switch (Constraints[i].Type) { 12234e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner case InlineAsm::isOutput: 12244e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // We can't assign any other output to this register. 12254e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner OutputRegs.insert(TheReg); 12264e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // If this is an early-clobber output, it cannot be assigned to the same 12274e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // value as the input reg. 12282223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner if (Constraints[i].isEarlyClobber || Constraints[i].hasMatchingInput) 12294e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner InputRegs.insert(TheReg); 12304e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner break; 12314e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner case InlineAsm::isClobber: 12324e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // Clobbered regs cannot be used as inputs or outputs. 12334e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner InputRegs.insert(TheReg); 12344e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner OutputRegs.insert(TheReg); 12354e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner break; 12364e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner case InlineAsm::isInput: 12374e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // We can't assign any other input to this register. 12384e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner InputRegs.insert(TheReg); 12394e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner break; 12404e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 12414e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner } 12422cc2f66c25d9576743026688fdae5ed402726532Chris Lattner 12436656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner for (unsigned i = 0, e = Constraints.size(); i != e; ++i) { 12442cc2f66c25d9576743026688fdae5ed402726532Chris Lattner assert(Constraints[i].Codes.size() == 1 && "Only handles one code so far!"); 12452cc2f66c25d9576743026688fdae5ed402726532Chris Lattner std::string &ConstraintCode = Constraints[i].Codes[0]; 12462cc2f66c25d9576743026688fdae5ed402726532Chris Lattner switch (Constraints[i].Type) { 12472cc2f66c25d9576743026688fdae5ed402726532Chris Lattner case InlineAsm::isOutput: { 12486656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Copy the output from the appropriate register. 12496656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner std::vector<unsigned> Regs = 12502cc2f66c25d9576743026688fdae5ed402726532Chris Lattner TLI.getRegForInlineAsmConstraint(ConstraintCode); 12514e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 12524e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner // Find a regsister that we can use. 12534e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner unsigned DestReg; 12544e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner if (Regs.size() == 1) 12554e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner DestReg = Regs[0]; 12562223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner else { 12572223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner bool UsesInputRegister = false; 12582223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner // If this is an early-clobber output, or if there is an input 12592223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner // constraint that matches this, we need to reserve the input register 12602223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner // so no other inputs allocate to it. 12612223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner if (Constraints[i].isEarlyClobber || Constraints[i].hasMatchingInput) 12622223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner UsesInputRegister = true; 12632223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner DestReg = GetAvailableRegister(true, UsesInputRegister, 12644e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner Regs, OutputRegs, InputRegs); 12652223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner } 12662223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner 12674e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner assert(DestReg && "Couldn't allocate output reg!"); 12682cc2f66c25d9576743026688fdae5ed402726532Chris Lattner 12692cc2f66c25d9576743026688fdae5ed402726532Chris Lattner const Type *OpTy; 12702cc2f66c25d9576743026688fdae5ed402726532Chris Lattner if (!Constraints[i].isIndirectOutput) { 12712cc2f66c25d9576743026688fdae5ed402726532Chris Lattner assert(!FoundOutputConstraint && 12722cc2f66c25d9576743026688fdae5ed402726532Chris Lattner "Cannot have multiple output constraints yet!"); 12732cc2f66c25d9576743026688fdae5ed402726532Chris Lattner FoundOutputConstraint = true; 12742cc2f66c25d9576743026688fdae5ed402726532Chris Lattner assert(I.getType() != Type::VoidTy && "Bad inline asm!"); 12752cc2f66c25d9576743026688fdae5ed402726532Chris Lattner 12762cc2f66c25d9576743026688fdae5ed402726532Chris Lattner RetValReg = DestReg; 12772cc2f66c25d9576743026688fdae5ed402726532Chris Lattner OpTy = I.getType(); 12782cc2f66c25d9576743026688fdae5ed402726532Chris Lattner } else { 12792cc2f66c25d9576743026688fdae5ed402726532Chris Lattner IndirectStoresToEmit.push_back(std::make_pair(DestReg, 12802cc2f66c25d9576743026688fdae5ed402726532Chris Lattner I.getOperand(OpNum))); 12812cc2f66c25d9576743026688fdae5ed402726532Chris Lattner OpTy = I.getOperand(OpNum)->getType(); 12822cc2f66c25d9576743026688fdae5ed402726532Chris Lattner OpTy = cast<PointerType>(OpTy)->getElementType(); 12832cc2f66c25d9576743026688fdae5ed402726532Chris Lattner OpNum++; // Consumes a call operand. 12842cc2f66c25d9576743026688fdae5ed402726532Chris Lattner } 12856656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner 12866656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Add information to the INLINEASM node to know that this register is 12876656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // set. 12882cc2f66c25d9576743026688fdae5ed402726532Chris Lattner AsmNodeOperands.push_back(DAG.getRegister(DestReg, 12892cc2f66c25d9576743026688fdae5ed402726532Chris Lattner TLI.getValueType(OpTy))); 12906656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner AsmNodeOperands.push_back(DAG.getConstant(2, MVT::i32)); // ISDEF 12912cc2f66c25d9576743026688fdae5ed402726532Chris Lattner 12926656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner break; 12936656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 12946656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner case InlineAsm::isInput: { 12952cc2f66c25d9576743026688fdae5ed402726532Chris Lattner Value *Operand = I.getOperand(OpNum); 12962cc2f66c25d9576743026688fdae5ed402726532Chris Lattner const Type *OpTy = Operand->getType(); 12974e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner OpNum++; // Consumes a call operand. 12982223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner 12994e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner unsigned SrcReg; 13003d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner SDOperand ResOp; 13013d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner unsigned ResOpType; 13023d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner SDOperand InOperandVal = getValue(Operand); 13033d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 13042223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner if (isdigit(ConstraintCode[0])) { // Matching constraint? 13052223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner // If this is required to match an output register we have already set, 13062223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner // just use its register. 13072223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner unsigned OperandNo = atoi(ConstraintCode.c_str()); 13082223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner SrcReg = cast<RegisterSDNode>(AsmNodeOperands[OperandNo*2+2])->getReg(); 13093d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner ResOp = DAG.getRegister(SrcReg, TLI.getValueType(OpTy)); 13103d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner ResOpType = 1; 13113d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 13123d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner Chain = DAG.getCopyToReg(Chain, SrcReg, InOperandVal, Flag); 13133d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner Flag = Chain.getValue(1); 13142223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner } else { 13153d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner TargetLowering::ConstraintType CTy = TargetLowering::C_RegisterClass; 13163d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner if (ConstraintCode.size() == 1) // not a physreg name. 13173d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner CTy = TLI.getConstraintType(ConstraintCode[0]); 13183d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 13193d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner switch (CTy) { 13203d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner default: assert(0 && "Unknown constraint type! FAIL!"); 13213d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner case TargetLowering::C_RegisterClass: { 13223d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner // Copy the input into the appropriate register. 13233d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner std::vector<unsigned> Regs = 13243d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner TLI.getRegForInlineAsmConstraint(ConstraintCode); 13253d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner if (Regs.size() == 1) 13263d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner SrcReg = Regs[0]; 13273d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner else 13283d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner SrcReg = GetAvailableRegister(false, true, Regs, 13293d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner OutputRegs, InputRegs); 13303d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner // FIXME: should be match fail. 13313d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner assert(SrcReg && "Wasn't able to allocate register!"); 13323d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner Chain = DAG.getCopyToReg(Chain, SrcReg, InOperandVal, Flag); 13333d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner Flag = Chain.getValue(1); 13343d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner 13353d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner ResOp = DAG.getRegister(SrcReg, TLI.getValueType(OpTy)); 13363d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner ResOpType = 1; 13373d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner break; 13383d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner } 13393d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner case TargetLowering::C_Other: 13403d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner if (!TLI.isOperandValidForConstraint(InOperandVal, ConstraintCode[0])) 13413d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner assert(0 && "MATCH FAIL!"); 13423d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner ResOp = InOperandVal; 13433d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner ResOpType = 3; 13443d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner break; 13453d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner } 13462223aea6ed33e4261d506afdcfbf30ccd8f52bfbChris Lattner } 13474e4b576e2edfc7d40a3d7177c639acbe91cfd45fChris Lattner 13483d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner // Add information to the INLINEASM node to know about this input. 13493d81fee8511536962543cbf420fd70ef15ae9c3aChris Lattner AsmNodeOperands.push_back(ResOp); 1350dc19b70d24e5fc0b80da36240550e31eb6ee4ee8Chris Lattner AsmNodeOperands.push_back(DAG.getConstant(ResOpType, MVT::i32)); 13516656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner break; 13526656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 13536656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner case InlineAsm::isClobber: 13546656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Nothing to do. 13556656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner break; 13566656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 13576656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1358ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1359ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner // Finish up input operands. 1360ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner AsmNodeOperands[0] = Chain; 1361ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner if (Flag.Val) AsmNodeOperands.push_back(Flag); 1362ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1363ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner std::vector<MVT::ValueType> VTs; 1364ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner VTs.push_back(MVT::Other); 1365ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner VTs.push_back(MVT::Flag); 1366ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner Chain = DAG.getNode(ISD::INLINEASM, VTs, AsmNodeOperands); 1367ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner Flag = Chain.getValue(1); 1368ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 13696656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // If this asm returns a register value, copy the result from that register 13706656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // and set it as the value of the call. 13716656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner if (RetValReg) { 13726656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner SDOperand Val = DAG.getCopyFromReg(Chain, RetValReg, 13736656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner TLI.getValueType(I.getType()), Flag); 13746656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Chain = Val.getValue(1); 13756656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Flag = Val.getValue(2); 13766656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner setValue(&I, Val); 13776656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 13786656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner 13796656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner std::vector<std::pair<SDOperand, Value*> > StoresToEmit; 13806656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner 13816656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Process indirect outputs, first output all of the flagged copies out of 13826656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // physregs. 13836656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner for (unsigned i = 0, e = IndirectStoresToEmit.size(); i != e; ++i) { 13846656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Value *Ptr = IndirectStoresToEmit[i].second; 13856656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner const Type *Ty = cast<PointerType>(Ptr->getType())->getElementType(); 13866656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner SDOperand Val = DAG.getCopyFromReg(Chain, IndirectStoresToEmit[i].first, 13876656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner TLI.getValueType(Ty), Flag); 13886656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Chain = Val.getValue(1); 13896656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Flag = Val.getValue(2); 13906656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner StoresToEmit.push_back(std::make_pair(Val, Ptr)); 13916656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner } 1392ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 13936656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner // Emit the non-flagged stores from the physregs. 13946656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner std::vector<SDOperand> OutChains; 13956656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner for (unsigned i = 0, e = StoresToEmit.size(); i != e; ++i) 13966656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner OutChains.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain, 13976656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner StoresToEmit[i].first, 13986656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner getValue(StoresToEmit[i].second), 13996656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner DAG.getSrcValue(StoresToEmit[i].second))); 14006656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner if (!OutChains.empty()) 14016656dd1a7888e6dabc82ebce734734127b1df6a7Chris Lattner Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains); 1402ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner DAG.setRoot(Chain); 1403ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner} 1404ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 1405ce7518ce92f45568dc7d4cbb863284afb962fec5Chris Lattner 14061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitMalloc(MallocInst &I) { 14071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(I.getOperand(0)); 14081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 14091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 141068cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner 141168cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < Src.getValueType()) 141268cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::TRUNCATE, IntPtr, Src); 141368cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > Src.getValueType()) 141468cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, Src); 14151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 14161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Scale the source by the type size. 14171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t ElementSize = TD.getTypeSize(I.getType()->getElementType()); 14181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src = DAG.getNode(ISD::MUL, Src.getValueType(), 14191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src, getIntPtrConstant(ElementSize)); 14201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 14211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 14221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(Src, TLI.getTargetData().getIntPtrType())); 1423cf5734dddd66af9388a171b44996505ede47feedChris Lattner 1424cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 1425adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), I.getType(), false, CallingConv::C, true, 1426cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("malloc", IntPtr), 1427cf5734dddd66af9388a171b44996505ede47feedChris Lattner Args, DAG); 1428cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); // Pointers always fit in registers 1429cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 14301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 14311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 14321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitFree(FreeInst &I) { 14331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 14341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(getValue(I.getOperand(0)), 14351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetData().getIntPtrType())); 14361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 1437cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 1438adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), Type::VoidTy, false, CallingConv::C, true, 1439cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("free", IntPtr), Args, DAG); 1440cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 14411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 14421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1443025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// InsertAtEndOfBasicBlock - This method should be implemented by targets that 1444025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// mark instructions with the 'usesCustomDAGSchedInserter' flag. These 1445025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// instructions are special in various ways, which require special support to 1446025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// insert. The specified MachineInstr is created but not inserted into any 1447025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// basic blocks, and the scheduler passes ownership of it to this method. 1448025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris LattnerMachineBasicBlock *TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI, 1449025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner MachineBasicBlock *MBB) { 1450025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner std::cerr << "If a target marks an instruction with " 1451025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "'usesCustomDAGSchedInserter', it must implement " 1452025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "TargetLowering::InsertAtEndOfBasicBlock!\n"; 1453025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner abort(); 1454025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner return 0; 1455025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner} 1456025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner 145739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitVAStart(CallInst &I) { 1458acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(DAG.getNode(ISD::VASTART, MVT::Other, getRoot(), 1459acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(1)), 1460acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(1)))); 146139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 146239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 14631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAArg(VAArgInst &I) { 1464acc398c195a697795bff3245943d104eb19192b9Nate Begeman SDOperand V = DAG.getVAArg(TLI.getValueType(I.getType()), getRoot(), 1465acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(0)), 1466acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(0))); 1467acc398c195a697795bff3245943d104eb19192b9Nate Begeman setValue(&I, V); 1468acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(V.getValue(1)); 14691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 14701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 14711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAEnd(CallInst &I) { 1472acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(DAG.getNode(ISD::VAEND, MVT::Other, getRoot(), 1473acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(1)), 1474acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(1)))); 14751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 14761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 14771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVACopy(CallInst &I) { 1478acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.setRoot(DAG.getNode(ISD::VACOPY, MVT::Other, getRoot(), 1479acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(1)), 1480acc398c195a697795bff3245943d104eb19192b9Nate Begeman getValue(I.getOperand(2)), 1481acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(1)), 1482acc398c195a697795bff3245943d104eb19192b9Nate Begeman DAG.getSrcValue(I.getOperand(2)))); 14831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 14841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 148539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// It is always conservatively correct for llvm.returnaddress and 148639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// llvm.frameaddress to return 0. 148739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnerstd::pair<SDOperand, SDOperand> 148839ae3622791986a0232f7e4797b633f8fa9e54d2Chris LattnerTargetLowering::LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, 148939ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth, SelectionDAG &DAG) { 149039ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner return std::make_pair(DAG.getConstant(0, getPointerTy()), Chain); 14911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 14921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 149350381b6c4180e9a2b983d4623da2e485cd768632Chris LattnerSDOperand TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) { 1494171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner assert(0 && "LowerOperation not implemented for this target!"); 1495171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner abort(); 1496d3f03e4b50feb6abfa9fec8b0aa705d45134c59eMisha Brukman return SDOperand(); 1497171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner} 1498171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner 14990aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate BegemanSDOperand TargetLowering::CustomPromoteOperation(SDOperand Op, 15000aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman SelectionDAG &DAG) { 15010aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman assert(0 && "CustomPromoteOperation not implemented for this target!"); 15020aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman abort(); 15030aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman return SDOperand(); 15040aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman} 15050aed7840ec8cc85f91b4aa6e69318bba0cbd1f03Nate Begeman 150639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitFrameReturnAddress(CallInst &I, bool isFrame) { 150739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth = (unsigned)cast<ConstantUInt>(I.getOperand(1))->getValue(); 150839ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::pair<SDOperand,SDOperand> Result = 1509a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner TLI.LowerFrameReturnAddress(isFrame, getRoot(), Depth, DAG); 151039ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner setValue(&I, Result.first); 151139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner DAG.setRoot(Result.second); 151239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 15131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 151474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// getMemsetValue - Vectorized representation of the memset value 15151db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng/// operand. 15161db92f947cc600dee5edb9305a4e0f1c5c872965Evan Chengstatic SDOperand getMemsetValue(SDOperand Value, MVT::ValueType VT, 1517a47876d87a84fa94bf9f09cfef6756223575611dEvan Cheng SelectionDAG &DAG) { 15181db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType CurVT = VT; 15191db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Value)) { 15201db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng uint64_t Val = C->getValue() & 255; 15211db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Shift = 8; 15221db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (CurVT != MVT::i8) { 15231db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Val = (Val << Shift) | Val; 15241db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Shift <<= 1; 15251db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng CurVT = (MVT::ValueType)((unsigned)CurVT - 1); 15261db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 15271db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng return DAG.getConstant(Val, VT); 15281db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } else { 15291db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Value = DAG.getNode(ISD::ZERO_EXTEND, VT, Value); 15301db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Shift = 8; 15311db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (CurVT != MVT::i8) { 15321db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Value = 15331db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng DAG.getNode(ISD::OR, VT, 15341db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng DAG.getNode(ISD::SHL, VT, Value, 15351db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng DAG.getConstant(Shift, MVT::i8)), Value); 15361db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Shift <<= 1; 15371db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng CurVT = (MVT::ValueType)((unsigned)CurVT - 1); 15381db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 15391db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 15401db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng return Value; 15411db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 15421db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng} 15431db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 154474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// getMemsetStringVal - Similar to getMemsetValue. Except this is only 154574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// used when a memcpy is turned into a memset when the source is a constant 154674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng/// string ptr. 154774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Chengstatic SDOperand getMemsetStringVal(MVT::ValueType VT, 154874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SelectionDAG &DAG, TargetLowering &TLI, 154974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng std::string &Str, unsigned Offset) { 155074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng MVT::ValueType CurVT = VT; 155174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng uint64_t Val = 0; 155274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng unsigned MSB = getSizeInBits(VT) / 8; 155374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (TLI.isLittleEndian()) 155474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Offset = Offset + MSB - 1; 155574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng for (unsigned i = 0; i != MSB; ++i) { 155674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Val = (Val << 8) | Str[Offset]; 155774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Offset += TLI.isLittleEndian() ? -1 : 1; 155874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 155974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng return DAG.getConstant(Val, VT); 156074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng} 156174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 15621db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng/// getMemBasePlusOffset - Returns base and offset node for the 15631db92f947cc600dee5edb9305a4e0f1c5c872965Evan Chengstatic SDOperand getMemBasePlusOffset(SDOperand Base, unsigned Offset, 15641db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SelectionDAG &DAG, TargetLowering &TLI) { 15651db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType VT = Base.getValueType(); 15661db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng return DAG.getNode(ISD::ADD, VT, Base, DAG.getConstant(Offset, VT)); 15671db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng} 15681db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 1569c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng/// MeetsMaxMemopRequirement - Determines if the number of memory ops required 157080e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng/// to replace the memset / memcpy is below the threshold. It also returns the 157180e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng/// types of the sequence of memory ops to perform memset / memcpy. 1572c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Chengstatic bool MeetsMaxMemopRequirement(std::vector<MVT::ValueType> &MemOps, 1573c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng unsigned Limit, uint64_t Size, 1574c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng unsigned Align, TargetLowering &TLI) { 15751db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType VT; 15761db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 15771db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (TLI.allowsUnalignedMemoryAccesses()) { 15781db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i64; 15791db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } else { 15801db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng switch (Align & 7) { 15811db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case 0: 15821db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i64; 15831db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 15841db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case 4: 15851db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i32; 15861db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 15871db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case 2: 15881db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i16; 15891db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 15901db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng default: 15911db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = MVT::i8; 15921db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng break; 15931db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 15941db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 15951db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 159680e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng MVT::ValueType LVT = MVT::i64; 159780e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng while (!TLI.isTypeLegal(LVT)) 159880e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng LVT = (MVT::ValueType)((unsigned)LVT - 1); 159980e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng assert(MVT::isInteger(LVT)); 16001db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 160180e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng if (VT > LVT) 160280e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng VT = LVT; 160380e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng 1604dea7245997f37972ed2f94d4ca1ec50c5af5000aEvan Cheng unsigned NumMemOps = 0; 16051db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (Size != 0) { 16061db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned VTSize = getSizeInBits(VT) / 8; 16071db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng while (VTSize > Size) { 16081db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VT = (MVT::ValueType)((unsigned)VT - 1); 16091db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng VTSize >>= 1; 16101db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 161180e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng assert(MVT::isInteger(VT)); 161280e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng 161380e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng if (++NumMemOps > Limit) 161480e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng return false; 16151db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MemOps.push_back(VT); 16161db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Size -= VTSize; 16171db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 161880e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng 161980e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng return true; 16201db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng} 16211db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 16227041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattnervoid SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) { 16231db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op1 = getValue(I.getOperand(1)); 16241db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op2 = getValue(I.getOperand(2)); 16251db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op3 = getValue(I.getOperand(3)); 16261db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng SDOperand Op4 = getValue(I.getOperand(4)); 16271db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Align = (unsigned)cast<ConstantSDNode>(Op4)->getValue(); 16281db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (Align == 0) Align = 1; 16291db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 16301db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng if (ConstantSDNode *Size = dyn_cast<ConstantSDNode>(Op3)) { 16311db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng std::vector<MVT::ValueType> MemOps; 16321db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 16331db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng // Expand memset / memcpy to a series of load / store ops 16341db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng // if the size operand falls below a certain threshold. 16351db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng std::vector<SDOperand> OutChains; 16361db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng switch (Op) { 1637ac940ab1bf21be40f74a83b202419a20ad2e279fEvan Cheng default: break; // Do nothing for now. 16381db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng case ISD::MEMSET: { 1639c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng if (MeetsMaxMemopRequirement(MemOps, TLI.getMaxStoresPerMemset(), 1640c4f8eee05447a1d7ead3deabbeb087e3e037f3f8Evan Cheng Size->getValue(), Align, TLI)) { 164180e89d7d6c02233a92d26bd4625e4188d48cbfa1Evan Cheng unsigned NumMemOps = MemOps.size(); 16421db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned Offset = 0; 16431db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng for (unsigned i = 0; i < NumMemOps; i++) { 16441db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng MVT::ValueType VT = MemOps[i]; 16451db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng unsigned VTSize = getSizeInBits(VT) / 8; 1646a47876d87a84fa94bf9f09cfef6756223575611dEvan Cheng SDOperand Value = getMemsetValue(Op2, VT, DAG); 1647c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng SDOperand Store = DAG.getNode(ISD::STORE, MVT::Other, getRoot(), 1648c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng Value, 1649c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng getMemBasePlusOffset(Op1, Offset, DAG, TLI), 1650c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng DAG.getSrcValue(I.getOperand(1), Offset)); 1651c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng OutChains.push_back(Store); 1652c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng Offset += VTSize; 1653c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 1654c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 1655c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng break; 1656c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 1657c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng case ISD::MEMCPY: { 1658c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng if (MeetsMaxMemopRequirement(MemOps, TLI.getMaxStoresPerMemcpy(), 1659c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng Size->getValue(), Align, TLI)) { 1660c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng unsigned NumMemOps = MemOps.size(); 166174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng unsigned SrcOff = 0, DstOff = 0; 166274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng GlobalAddressSDNode *G = NULL; 166374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng std::string Str; 166474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 166574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (Op2.getOpcode() == ISD::GlobalAddress) 166674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng G = cast<GlobalAddressSDNode>(Op2); 166774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng else if (Op2.getOpcode() == ISD::ADD && 166874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Op2.getOperand(0).getOpcode() == ISD::GlobalAddress && 166974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Op2.getOperand(1).getOpcode() == ISD::Constant) { 167074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng G = cast<GlobalAddressSDNode>(Op2.getOperand(0)); 167174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SrcOff += cast<ConstantSDNode>(Op2.getOperand(1))->getValue(); 167274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 167374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (G) { 167474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng GlobalVariable *GV = dyn_cast<GlobalVariable>(G->getGlobal()); 167574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (GV) 167674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Str = getStringValue(GV); 167774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 167874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 1679c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng for (unsigned i = 0; i < NumMemOps; i++) { 1680c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng MVT::ValueType VT = MemOps[i]; 1681c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng unsigned VTSize = getSizeInBits(VT) / 8; 168274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SDOperand Value, Chain, Store; 168374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng 168474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng if (!Str.empty()) { 168574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Value = getMemsetStringVal(VT, DAG, TLI, Str, SrcOff); 168674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Chain = getRoot(); 168774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Store = 168874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getNode(ISD::STORE, MVT::Other, Chain, Value, 168974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng getMemBasePlusOffset(Op1, DstOff, DAG, TLI), 169074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getSrcValue(I.getOperand(1), DstOff)); 169174d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } else { 169274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Value = DAG.getLoad(VT, getRoot(), 169374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng getMemBasePlusOffset(Op2, SrcOff, DAG, TLI), 169474d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getSrcValue(I.getOperand(2), SrcOff)); 169574d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Chain = Value.getValue(1); 169674d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng Store = 169774d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getNode(ISD::STORE, MVT::Other, Chain, Value, 169874d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng getMemBasePlusOffset(Op1, DstOff, DAG, TLI), 169974d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DAG.getSrcValue(I.getOperand(1), DstOff)); 170074d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng } 1701c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng OutChains.push_back(Store); 170274d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng SrcOff += VTSize; 170374d0aa9a4b1f5e021d2ce851a7af344e9b4ebb23Evan Cheng DstOff += VTSize; 17041db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 17051db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 1706c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng break; 17071db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 17081db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 1709c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng 1710c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng if (!OutChains.empty()) { 1711c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains)); 1712c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng return; 1713c080d6fb3dc7769c5a1e00c6a77cb415453b0b89Evan Cheng } 17141db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng } 17151db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng 17167041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner std::vector<SDOperand> Ops; 1717a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner Ops.push_back(getRoot()); 17181db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op1); 17191db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op2); 17201db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op3); 17211db92f947cc600dee5edb9305a4e0f1c5c872965Evan Cheng Ops.push_back(Op4); 17227041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner DAG.setRoot(DAG.getNode(Op, MVT::Other, Ops)); 17231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 17241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 17257041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 17267041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner// SelectionDAGISel code 17277041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 17281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 17291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerunsigned SelectionDAGISel::MakeReg(MVT::ValueType VT) { 17301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return RegMap->createVirtualRegister(TLI.getRegClassFor(VT)); 17311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 17321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1733495a0b51915eb763576874f29192820b731edc22Chris Lattnervoid SelectionDAGISel::getAnalysisUsage(AnalysisUsage &AU) const { 173436b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // FIXME: we only modify the CFG to split critical edges. This 173536b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // updates dom and loop info. 1736495a0b51915eb763576874f29192820b731edc22Chris Lattner} 17371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1738c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1739c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// InsertGEPComputeCode - Insert code into BB to compute Ptr+PtrOffset, 1740c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// casting to the type of GEPI. 1741c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattnerstatic Value *InsertGEPComputeCode(Value *&V, BasicBlock *BB, Instruction *GEPI, 1742c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Value *Ptr, Value *PtrOffset) { 1743c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (V) return V; // Already computed. 1744c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1745c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner BasicBlock::iterator InsertPt; 1746c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (BB == GEPI->getParent()) { 1747c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // If insert into the GEP's block, insert right after the GEP. 1748c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner InsertPt = GEPI; 1749c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ++InsertPt; 1750c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } else { 1751c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Otherwise, insert at the top of BB, after any PHI nodes 1752c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner InsertPt = BB->begin(); 1753c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner while (isa<PHINode>(InsertPt)) ++InsertPt; 1754c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 1755c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1756c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // If Ptr is itself a cast, but in some other BB, emit a copy of the cast into 1757c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // BB so that there is only one value live across basic blocks (the cast 1758c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // operand). 1759c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner if (CastInst *CI = dyn_cast<CastInst>(Ptr)) 1760c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner if (CI->getParent() != BB && isa<PointerType>(CI->getOperand(0)->getType())) 1761c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner Ptr = new CastInst(CI->getOperand(0), CI->getType(), "", InsertPt); 1762c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner 1763c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Add the offset, cast it to the right type. 1764c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr = BinaryOperator::createAdd(Ptr, PtrOffset, "", InsertPt); 1765c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr = new CastInst(Ptr, GEPI->getType(), "", InsertPt); 1766c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner return V = Ptr; 1767c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner} 1768c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1769c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1770c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// OptimizeGEPExpression - Since we are doing basic-block-at-a-time instruction 1771c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// selection, we want to be a bit careful about some things. In particular, if 1772c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// we have a GEP instruction that is used in a different block than it is 1773c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// defined, the addressing expression of the GEP cannot be folded into loads or 1774c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// stores that use it. In this case, decompose the GEP and move constant 1775c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner/// indices into blocks that use it. 1776c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattnerstatic void OptimizeGEPExpression(GetElementPtrInst *GEPI, 1777c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner const TargetData &TD) { 1778c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // If this GEP is only used inside the block it is defined in, there is no 1779c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // need to rewrite it. 1780c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner bool isUsedOutsideDefBB = false; 1781c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner BasicBlock *DefBB = GEPI->getParent(); 1782c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (Value::use_iterator UI = GEPI->use_begin(), E = GEPI->use_end(); 1783c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner UI != E; ++UI) { 1784c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (cast<Instruction>(*UI)->getParent() != DefBB) { 1785c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner isUsedOutsideDefBB = true; 1786c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner break; 1787c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 1788c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 1789c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (!isUsedOutsideDefBB) return; 1790c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1791c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // If this GEP has no non-zero constant indices, there is nothing we can do, 1792c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // ignore it. 1793c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner bool hasConstantIndex = false; 1794c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (GetElementPtrInst::op_iterator OI = GEPI->op_begin()+1, 1795c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner E = GEPI->op_end(); OI != E; ++OI) { 1796c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(*OI)) 1797c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (CI->getRawValue()) { 1798c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner hasConstantIndex = true; 1799c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner break; 1800c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 1801c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 18023802c2552fe4475418db3c948e7601d7259f996dChris Lattner // If this is a GEP &Alloca, 0, 0, forward subst the frame index into uses. 18033802c2552fe4475418db3c948e7601d7259f996dChris Lattner if (!hasConstantIndex && !isa<AllocaInst>(GEPI->getOperand(0))) return; 1804c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1805c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Otherwise, decompose the GEP instruction into multiplies and adds. Sum the 1806c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // constant offset (which we now know is non-zero) and deal with it later. 1807c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner uint64_t ConstantOffset = 0; 1808c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner const Type *UIntPtrTy = TD.getIntPtrType(); 1809c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Value *Ptr = new CastInst(GEPI->getOperand(0), UIntPtrTy, "", GEPI); 1810c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner const Type *Ty = GEPI->getOperand(0)->getType(); 1811c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1812c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (GetElementPtrInst::op_iterator OI = GEPI->op_begin()+1, 1813c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner E = GEPI->op_end(); OI != E; ++OI) { 1814c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Value *Idx = *OI; 1815c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (const StructType *StTy = dyn_cast<StructType>(Ty)) { 1816c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner unsigned Field = cast<ConstantUInt>(Idx)->getValue(); 1817c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (Field) 1818c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset += TD.getStructLayout(StTy)->MemberOffsets[Field]; 1819c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ty = StTy->getElementType(Field); 1820c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } else { 1821c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ty = cast<SequentialType>(Ty)->getElementType(); 1822c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1823c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Handle constant subscripts. 1824c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 1825c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (CI->getRawValue() == 0) continue; 1826c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1827c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (ConstantSInt *CSI = dyn_cast<ConstantSInt>(CI)) 1828c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset += (int64_t)TD.getTypeSize(Ty)*CSI->getValue(); 1829c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner else 1830c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset+=TD.getTypeSize(Ty)*cast<ConstantUInt>(CI)->getValue(); 1831c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner continue; 1832c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 1833c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1834c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Ptr = Ptr + Idx * ElementSize; 1835c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1836c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Cast Idx to UIntPtrTy if needed. 1837c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Idx = new CastInst(Idx, UIntPtrTy, "", GEPI); 1838c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1839c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner uint64_t ElementSize = TD.getTypeSize(Ty); 1840c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Mask off bits that should not be set. 1841c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ElementSize &= ~0ULL >> (64-UIntPtrTy->getPrimitiveSizeInBits()); 1842c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Constant *SizeCst = ConstantUInt::get(UIntPtrTy, ElementSize); 1843c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1844c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Multiply by the element size and add to the base. 1845c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Idx = BinaryOperator::createMul(Idx, SizeCst, "", GEPI); 1846c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr = BinaryOperator::createAdd(Ptr, Idx, "", GEPI); 1847c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 1848c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 1849c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1850c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Make sure that the offset fits in uintptr_t. 1851c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner ConstantOffset &= ~0ULL >> (64-UIntPtrTy->getPrimitiveSizeInBits()); 1852c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Constant *PtrOffset = ConstantUInt::get(UIntPtrTy, ConstantOffset); 1853c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1854c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Okay, we have now emitted all of the variable index parts to the BB that 1855c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // the GEP is defined in. Loop over all of the using instructions, inserting 1856c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // an "add Ptr, ConstantOffset" into each block that uses it and update the 1857c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // instruction to use the newly computed value, making GEPI dead. When the 1858c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // user is a load or store instruction address, we emit the add into the user 1859c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // block, otherwise we use a canonical version right next to the gep (these 1860c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // won't be foldable as addresses, so we might as well share the computation). 1861c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner 1862c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner std::map<BasicBlock*,Value*> InsertedExprs; 1863c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner while (!GEPI->use_empty()) { 1864c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Instruction *User = cast<Instruction>(GEPI->use_back()); 1865c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner 1866c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // If this use is not foldable into the addressing mode, use a version 1867c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // emitted in the GEP block. 1868c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner Value *NewVal; 1869c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner if (!isa<LoadInst>(User) && 1870c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner (!isa<StoreInst>(User) || User->getOperand(0) == GEPI)) { 1871c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner NewVal = InsertGEPComputeCode(InsertedExprs[DefBB], DefBB, GEPI, 1872c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner Ptr, PtrOffset); 1873c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner } else { 1874c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // Otherwise, insert the code in the User's block so it can be folded into 1875c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner // any users in that block. 1876c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner NewVal = InsertGEPComputeCode(InsertedExprs[User->getParent()], 1877c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner User->getParent(), GEPI, 1878c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner Ptr, PtrOffset); 1879c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner } 1880c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner User->replaceUsesOfWith(GEPI, NewVal); 1881c78b0b740bcf2e00a8871090709c3571fe442f07Chris Lattner } 1882c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1883c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // Finally, the GEP is dead, remove it. 1884c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner GEPI->eraseFromParent(); 1885c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner} 1886c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 18871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerbool SelectionDAGISel::runOnFunction(Function &Fn) { 18881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction &MF = MachineFunction::construct(&Fn, TLI.getTargetMachine()); 18891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner RegMap = MF.getSSARegMap(); 18901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "\n\n\n=== " << Fn.getName() << "\n"); 18911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1892c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // First, split all critical edges for PHI nodes with incoming values that are 1893c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // constants, this way the load of the constant into a vreg will not be placed 1894c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // into MBBs that are used some other way. 1895c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // 1896c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // In this pass we also look for GEP instructions that are used across basic 1897c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // blocks and rewrites them to improve basic-block-at-a-time selection. 1898c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner // 189936b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (Function::iterator BB = Fn.begin(), E = Fn.end(); BB != E; ++BB) { 190036b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner PHINode *PN; 1901c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner BasicBlock::iterator BBI; 1902c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (BBI = BB->begin(); (PN = dyn_cast<PHINode>(BBI)); ++BBI) 190336b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i) 190436b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner if (isa<Constant>(PN->getIncomingValue(i))) 190536b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner SplitCriticalEdge(PN->getIncomingBlock(i), BB); 1906c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner 1907c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner for (BasicBlock::iterator E = BB->end(); BBI != E; ) 1908c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner if (GetElementPtrInst *GEPI = dyn_cast<GetElementPtrInst>(BBI++)) 1909c88d8e944dae71e31595b8ae264668e68db6b8edChris Lattner OptimizeGEPExpression(GEPI, TLI.getTargetData()); 191036b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner } 1911c9ea6fde305b35ab7c9f909ac390d4b53e33d536Chris Lattner 19121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo FuncInfo(TLI, Fn, MF); 19131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 19141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Function::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) 19151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectBasicBlock(I, MF, FuncInfo); 1916edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 19171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 19181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 19191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 19201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1921ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerSDOperand SelectionDAGISel:: 1922ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerCopyValueToVirtualRegister(SelectionDAGLowering &SDL, Value *V, unsigned Reg) { 1923f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner SDOperand Op = SDL.getValue(V); 192418c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner assert((Op.getOpcode() != ISD::CopyFromReg || 1925d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner cast<RegisterSDNode>(Op.getOperand(1))->getReg() != Reg) && 192618c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner "Copy from a reg to the same reg!"); 1927d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 1928d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // If this type is not legal, we must make sure to not create an invalid 1929d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // register use. 1930d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType SrcVT = Op.getValueType(); 1931d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(SrcVT); 1932d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SelectionDAG &DAG = SDL.DAG; 1933d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (SrcVT == DestVT) { 1934d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 1935d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else if (SrcVT < DestVT) { 1936d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is promoted to the register. 1937fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner if (MVT::isFloatingPoint(SrcVT)) 1938fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner Op = DAG.getNode(ISD::FP_EXTEND, DestVT, Op); 1939fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner else 1940fab08875b73656f373b10a59aad475615df82bafChris Lattner Op = DAG.getNode(ISD::ANY_EXTEND, DestVT, Op); 1941d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 1942d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else { 1943d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is expanded into multiple registers. 1944d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 1945d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(0, MVT::i32)); 1946d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 1947d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(1, MVT::i32)); 1948d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op = DAG.getCopyToReg(SDL.getRoot(), Reg, Lo); 1949d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(Op, Reg+1, Hi); 1950d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 19511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 19521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1953068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel:: 1954068a81e9fca511b9a3b3a0f28a8988a57f994652Chris LattnerLowerArguments(BasicBlock *BB, SelectionDAGLowering &SDL, 1955068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> &UnorderedChains) { 19561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is the entry block, emit arguments. 1957068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner Function &F = *BB->getParent(); 19580afa8e348eab21d3e09ae3240544886d61879266Chris Lattner FunctionLoweringInfo &FuncInfo = SDL.FuncInfo; 1959bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDOperand OldRoot = SDL.DAG.getRoot(); 1960bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner std::vector<SDOperand> Args = TLI.LowerArguments(F, SDL.DAG); 1961bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 1962bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner unsigned a = 0; 1963bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1964bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner AI != E; ++AI, ++a) 1965bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (!AI->use_empty()) { 1966bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDL.setValue(AI, Args[a]); 1967fa57702388f139e964befecb4b98c7dfe836945fChris Lattner 1968bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // If this argument is live outside of the entry block, insert a copy from 1969bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // whereever we got it to the vreg that other BB's will reference it as. 1970bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (FuncInfo.ValueMap.count(AI)) { 1971bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDOperand Copy = 1972bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner CopyValueToVirtualRegister(SDL, AI, FuncInfo.ValueMap[AI]); 1973bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner UnorderedChains.push_back(Copy); 1974bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner } 19750afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 1976bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 1977bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Next, if the function has live ins that need to be copied into vregs, 1978bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // emit the copies now, into the top of the block. 1979bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner MachineFunction &MF = SDL.DAG.getMachineFunction(); 1980bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (MF.livein_begin() != MF.livein_end()) { 1981bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SSARegMap *RegMap = MF.getSSARegMap(); 1982bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner const MRegisterInfo &MRI = *MF.getTarget().getRegisterInfo(); 1983bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (MachineFunction::livein_iterator LI = MF.livein_begin(), 1984bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner E = MF.livein_end(); LI != E; ++LI) 1985bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (LI->second) 1986bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner MRI.copyRegToReg(*MF.begin(), MF.begin()->end(), LI->second, 1987bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner LI->first, RegMap->getRegClass(LI->second)); 19881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1989bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 1990bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Finally, if the target has anything special to do, allow it to do so. 1991bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner EmitFunctionEntryCode(F, SDL.DAG.getMachineFunction()); 1992068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner} 1993068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 1994068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 1995068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB, 1996068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > &PHINodesToUpdate, 1997068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner FunctionLoweringInfo &FuncInfo) { 1998068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner SelectionDAGLowering SDL(DAG, TLI, FuncInfo); 1999068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 2000068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> UnorderedChains; 2001edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 2002bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Lower any arguments needed in this block if this is the entry block. 2003bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (LLVMBB == &LLVMBB->getParent()->front()) 2004bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner LowerArguments(LLVMBB, SDL, UnorderedChains); 20051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BB = FuncInfo.MBBMap[LLVMBB]; 20071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.setCurrentBasicBlock(BB); 20081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower all of the non-terminator instructions. 20101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = --LLVMBB->end(); 20111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner I != E; ++I) 20121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*I); 20131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Ensure that all instructions which are used outside of their defining 20151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // blocks are available as virtual registers. 20161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = LLVMBB->end(); I != E;++I) 2017f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner if (!I->use_empty() && !isa<PHINode>(I)) { 2018ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner std::map<const Value*, unsigned>::iterator VMI =FuncInfo.ValueMap.find(I); 20191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (VMI != FuncInfo.ValueMap.end()) 2020ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 2021ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, I, VMI->second)); 20221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 20231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle PHI nodes in successor blocks. Emit code into the SelectionDAG to 20251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // ensure constants are generated when needed. Remember the virtual registers 20261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // that need to be added to the Machine PHI nodes as input. We cannot just 20271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // directly add them, because expansion might result in multiple MBB's for one 20281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // BB. As such, the start of the BB might correspond to a different MBB than 20291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the end. 2030edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman // 20311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Emit constants only once even if used by multiple PHI nodes. 20331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<Constant*, unsigned> ConstantsOut; 20341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Check successor nodes PHI nodes that expect a constant to be available from 20361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // this block. 20371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 20381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { 20391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *SuccBB = TI->getSuccessor(succ); 20401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock::iterator MBBI = FuncInfo.MBBMap[SuccBB]->begin(); 20411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 20421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 20431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // At this point we know that there is a 1-1 correspondence between LLVM PHI 20441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // nodes and Machine PHI nodes, but the incoming operands have not been 20451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // emitted yet. 20461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = SuccBB->begin(); 2047f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 2048f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 2049f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned Reg; 2050f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB); 2051f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (Constant *C = dyn_cast<Constant>(PHIOp)) { 2052f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned &RegOut = ConstantsOut[C]; 2053f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (RegOut == 0) { 2054f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner RegOut = FuncInfo.CreateRegForValue(C); 2055ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 2056ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, C, RegOut)); 2057f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 2058f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = RegOut; 2059f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } else { 2060f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = FuncInfo.ValueMap[PHIOp]; 2061ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner if (Reg == 0) { 2062edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman assert(isa<AllocaInst>(PHIOp) && 2063ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(PHIOp)) && 2064ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner "Didn't codegen value into a register!??"); 2065ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner Reg = FuncInfo.CreateRegForValue(PHIOp); 2066ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 2067ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, PHIOp, Reg)); 2068ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner } 20691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2070edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 2071f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // Remember that this register needs to added to the machine PHI node as 2072f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // the input for this MBB. 2073f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 2074f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 2075f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0, e = NumElements; i != e; ++i) 2076f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg+i)); 20771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 20781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 20791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ConstantsOut.clear(); 20801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2081ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner // Turn all of the unordered chains into one factored node. 20825a6c6d98d561df671350a56c8031a3611f1c46faChris Lattner if (!UnorderedChains.empty()) { 20837436b57de32333cc337b8c7cea208c8863eee793Chris Lattner SDOperand Root = SDL.getRoot(); 20847436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (Root.getOpcode() != ISD::EntryToken) { 20857436b57de32333cc337b8c7cea208c8863eee793Chris Lattner unsigned i = 0, e = UnorderedChains.size(); 20867436b57de32333cc337b8c7cea208c8863eee793Chris Lattner for (; i != e; ++i) { 20877436b57de32333cc337b8c7cea208c8863eee793Chris Lattner assert(UnorderedChains[i].Val->getNumOperands() > 1); 20887436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (UnorderedChains[i].Val->getOperand(0) == Root) 20897436b57de32333cc337b8c7cea208c8863eee793Chris Lattner break; // Don't add the root if we already indirectly depend on it. 20907436b57de32333cc337b8c7cea208c8863eee793Chris Lattner } 20917436b57de32333cc337b8c7cea208c8863eee793Chris Lattner 20927436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (i == e) 20937436b57de32333cc337b8c7cea208c8863eee793Chris Lattner UnorderedChains.push_back(Root); 20947436b57de32333cc337b8c7cea208c8863eee793Chris Lattner } 2095ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, UnorderedChains)); 2096ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner } 2097ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner 20981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower the terminator after the copies are emitted. 20991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*LLVMBB->getTerminator()); 2100a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 2101a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner // Make sure the root of the DAG is up-to-date. 2102a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(SDL.getRoot()); 21031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 21041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 21051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF, 21061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo) { 2107b2efb853f00d45b1c8d57f92acd0028fbdeffda6Jim Laskey SelectionDAG DAG(TLI, MF, getAnalysisToUpdate<MachineDebugInfo>()); 21081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurDAG = &DAG; 21091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > PHINodesToUpdate; 21101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 21111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // First step, lower LLVM code to some DAG. This DAG may use operations and 21121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // types that are not supported by the target. 21131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BuildSelectionDAG(DAG, LLVMBB, PHINodesToUpdate, FuncInfo); 21141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2115af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in pre-legalize mode. 2116af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner DAG.Combine(false); 21172300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 21181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Lowered selection DAG:\n"); 21191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 21201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 21211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Second step, hack on the DAG until it only uses operations and types that 21221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the target supports. 2123ac9dc08c7f0ae60c125624d72c3022025d79ee9eChris Lattner DAG.Legalize(); 21241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 21251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Legalized selection DAG:\n"); 21261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 21271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2128af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in post-legalize mode. 2129af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner DAG.Combine(true); 21302300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 2131a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng if (ViewISelDAGs) DAG.viewGraph(); 2132d48050aa1509130871b8bb2453270c92b969c2e7Chris Lattner 2133a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Third, instruction select all of the operations to machine code, adding the 2134a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // code to the MachineBasicBlock. 21351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InstructionSelectBasicBlock(DAG); 21361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 21371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Selected machine code:\n"); 21381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(BB->dump()); 21391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2140a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Next, now that we know what the last MBB the LLVM BB expanded is, update 21411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // PHI nodes in successors. 21421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 0, e = PHINodesToUpdate.size(); i != e; ++i) { 21431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineInstr *PHI = PHINodesToUpdate[i].first; 21441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(PHI->getOpcode() == TargetInstrInfo::PHI && 21451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner "This is not a machine PHI node that we are updating!"); 21461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addRegOperand(PHINodesToUpdate[i].second); 21471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addMachineBasicBlockOperand(BB); 21481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2149a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner 2150a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Finally, add the CFG edges from the last selected MBB to the successor 2151a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // MBBs. 2152a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 2153a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i) { 2154a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[TI->getSuccessor(i)]; 2155a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner BB->addSuccessor(Succ0MBB); 2156a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner } 21571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2158a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng 2159a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng//===----------------------------------------------------------------------===// 2160a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng/// ScheduleAndEmitDAG - Pick a safe ordering and emit instructions for each 2161a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng/// target node in the graph. 2162a9c2091cd38e401c846391c9951ff416e709b65eEvan Chengvoid SelectionDAGISel::ScheduleAndEmitDAG(SelectionDAG &DAG) { 2163a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng if (ViewSchedDAGs) DAG.viewGraph(); 21644ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng ScheduleDAG *SL = NULL; 21654ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng 21664ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng switch (ISHeuristic) { 21674ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng default: assert(0 && "Unrecognized scheduling heuristic"); 21683f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng case defaultScheduling: 21693f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng if (TLI.getSchedulingPreference() == TargetLowering::SchedulingForLatency) 21703f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng SL = createSimpleDAGScheduler(noScheduling, DAG, BB); 21713f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng else /* TargetLowering::SchedulingForRegPressure */ 21723f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng SL = createBURRListDAGScheduler(DAG, BB); 21733f23952404cd03a8ab934cedcef7916f52a796c0Evan Cheng break; 21744ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng case noScheduling: 21754ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng case simpleScheduling: 21764ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng case simpleNoItinScheduling: 21774ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng SL = createSimpleDAGScheduler(ISHeuristic, DAG, BB); 21784ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng break; 2179f0f9c90204c650b9f3c3feb02ccfcb1e40c6acddEvan Cheng case listSchedulingBURR: 2180f0f9c90204c650b9f3c3feb02ccfcb1e40c6acddEvan Cheng SL = createBURRListDAGScheduler(DAG, BB); 21814ef10867499aa146cd819c78d8d37a8353d4f0ffEvan Cheng } 2182a3818e6f9a62db0c5b6aee28e44c30d5f96c9fa4Chris Lattner BB = SL->Run(); 2183cccf1232a69e2d78516c61a97e7bfa26acefb714Evan Cheng delete SL; 2184a9c2091cd38e401c846391c9951ff416e709b65eEvan Cheng} 2185