SelectionDAGISel.cpp revision 2aeaf4e839438d51766996006fc22310d05ab2a7
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" 16adf6a965a321372c640845407195594835921eb4Chris Lattner#include "llvm/CallingConv.h" 171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Constants.h" 181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/DerivedTypes.h" 191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Function.h" 201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instructions.h" 211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Intrinsics.h" 221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFunction.h" 231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFrameInfo.h" 241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineInstrBuilder.h" 251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SelectionDAG.h" 261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SSARegMap.h" 27fa57702388f139e964befecb4b98c7dfe836945fChris Lattner#include "llvm/Target/MRegisterInfo.h" 281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetData.h" 291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetFrameInfo.h" 301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetInstrInfo.h" 311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetLowering.h" 321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetMachine.h" 33495a0b51915eb763576874f29192820b731edc22Chris Lattner#include "llvm/Transforms/Utils/BasicBlockUtils.h" 347944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#include "llvm/Support/CommandLine.h" 351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Support/Debug.h" 361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include <map> 371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include <iostream> 381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerusing namespace llvm; 391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 402300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman// Temporary command line code to enable use of the dag combiner as a beta 412300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman// option. 422300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begemannamespace llvm { 432300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman bool CombinerEnabled; 442300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman} 452300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begemannamespace { 462300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman cl::opt<bool, true> 472300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman CombineDAG("enable-dag-combiner", cl::Hidden, 482300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman cl::desc("Run the DAG combiner before and after Legalize"), 492300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman cl::location(CombinerEnabled), 502300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman cl::init(false)); 512300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman} 52da8abb02397d7cd62a1e16e7c534edd7096ac873Chris Lattner#ifndef NDEBUG 537944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattnerstatic cl::opt<bool> 547944d9d9957db1efe085d9df3ea89826f50029b7Chris LattnerViewDAGs("view-isel-dags", cl::Hidden, 557944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner cl::desc("Pop up a window to show isel dags as they are selected")); 567944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#else 57a639a43602cd64087a9730632fbf6f7cf7d88276Chris Lattnerstatic const bool ViewDAGs = 0; 587944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#endif 597944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner 602300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnernamespace llvm { 621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner //===--------------------------------------------------------------------===// 631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// FunctionLoweringInfo - This contains information that is global to a 641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// function that is used when lowering a region of the function. 65f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner class FunctionLoweringInfo { 66f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner public: 671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TargetLowering &TLI; 681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Function &Fn; 691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction &MF; 701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SSARegMap *RegMap; 711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo(TargetLowering &TLI, Function &Fn,MachineFunction &MF); 731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// MBBMap - A mapping from LLVM basic blocks to their machine code entry. 751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const BasicBlock*, MachineBasicBlock *> MBBMap; 761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// ValueMap - Since we emit code for the function a basic block at a time, 781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// we must remember which virtual registers hold the values for 791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// cross-basic-block values. 801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, unsigned> ValueMap; 811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// StaticAllocaMap - Keep track of frame indices for fixed sized allocas in 831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// the entry block. This allows the allocas to be efficiently referenced 841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// anywhere in the function. 851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const AllocaInst*, int> StaticAllocaMap; 861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 870afa8e348eab21d3e09ae3240544886d61879266Chris Lattner /// BlockLocalArguments - If any arguments are only used in a single basic 880afa8e348eab21d3e09ae3240544886d61879266Chris Lattner /// block, and if the target can access the arguments without side-effects, 890afa8e348eab21d3e09ae3240544886d61879266Chris Lattner /// avoid emitting CopyToReg nodes for those arguments. This map keeps 900afa8e348eab21d3e09ae3240544886d61879266Chris Lattner /// track of which arguments are local to each BB. 910afa8e348eab21d3e09ae3240544886d61879266Chris Lattner std::multimap<BasicBlock*, std::pair<Argument*, 920afa8e348eab21d3e09ae3240544886d61879266Chris Lattner unsigned> > BlockLocalArguments; 930afa8e348eab21d3e09ae3240544886d61879266Chris Lattner 940afa8e348eab21d3e09ae3240544886d61879266Chris Lattner 951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned MakeReg(MVT::ValueType VT) { 961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return RegMap->createVirtualRegister(TLI.getRegClassFor(VT)); 971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 98edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned CreateRegForValue(const Value *V) { 1001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType VT = TLI.getValueType(V->getType()); 1011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // The common case is that we will only create one register for this 1021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // value. If we have that case, create and return the virtual register. 1031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned NV = TLI.getNumElements(VT); 104fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner if (NV == 1) { 105fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner // If we are promoting this value, pick the next largest supported type. 10698e5c0e5e4c5be1b531d287d0a1373a62fe562e2Chris Lattner return MakeReg(TLI.getTypeToTransformTo(VT)); 107fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner } 108edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this value is represented with multiple target registers, make sure 1101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // to create enough consequtive registers of the right (smaller) type. 1111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned NT = VT-1; // Find the type to use. 1121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner while (TLI.getNumElements((MVT::ValueType)NT) != 1) 1131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner --NT; 114edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned R = MakeReg((MVT::ValueType)NT); 1161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 1; i != NV; ++i) 1171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MakeReg((MVT::ValueType)NT); 1181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return R; 1191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 120edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned InitializeRegForValue(const Value *V) { 1221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned &R = ValueMap[V]; 1231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(R == 0 && "Already initialized this value register!"); 1241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return R = CreateRegForValue(V); 1251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner }; 1271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// isUsedOutsideOfDefiningBlock - Return true if this instruction is used by 1301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// PHI nodes or outside of the basic block that defines it. 1311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerstatic bool isUsedOutsideOfDefiningBlock(Instruction *I) { 1321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (isa<PHINode>(I)) return true; 1331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *BB = I->getParent(); 1341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E; ++UI) 1351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (cast<Instruction>(*UI)->getParent() != BB || isa<PHINode>(*UI)) 1361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 1371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return false; 1381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris LattnerFunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli, 141edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman Function &fn, MachineFunction &mf) 1421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), Fn(fn), MF(mf), RegMap(MF.getSSARegMap()) { 1431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Initialize the mapping of values to registers. This is only set up for 1451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // instruction values that are used outside of the block that defines 1461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // them. 14716ce0df92717cd1474029d87efe596d000dc2caaChris Lattner for (Function::arg_iterator AI = Fn.arg_begin(), E = Fn.arg_end(); 14816ce0df92717cd1474029d87efe596d000dc2caaChris Lattner AI != E; ++AI) 1491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InitializeRegForValue(AI); 1501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1512aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen Function::iterator BB = Fn.begin(), EB = Fn.end(); 1521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 1531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (AllocaInst *AI = dyn_cast<AllocaInst>(I)) 1541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (ConstantUInt *CUI = dyn_cast<ConstantUInt>(AI->getArraySize())) { 1551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = AI->getAllocatedType(); 1561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 1571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned Align = TLI.getTargetData().getTypeAlignment(Ty); 158a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner 159a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // If the alignment of the value is smaller than the size of the value, 160a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // and if the size of the value is particularly small (<= 8 bytes), 161a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // round up to the size of the value for potentially better performance. 162a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // 163a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // FIXME: This could be made better with a preferred alignment hook in 164a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // TargetData. It serves primarily to 8-byte align doubles for X86. 165a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner if (Align < TySize && TySize <= 8) Align = TySize; 166a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner 167fd88f64934c43613dd4a70b97db620de1338782bChris Lattner if (CUI->getValue()) // Don't produce zero sized stack objects 168fd88f64934c43613dd4a70b97db620de1338782bChris Lattner TySize *= CUI->getValue(); // Get total allocated size. 1691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner StaticAllocaMap[AI] = 170f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner MF.getFrameInfo()->CreateStackObject((unsigned)TySize, Align); 1711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1732aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (; BB != EB; ++BB) 1742aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 1751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!I->use_empty() && isUsedOutsideOfDefiningBlock(I)) 1761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!isa<AllocaInst>(I) || 1771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner !StaticAllocaMap.count(cast<AllocaInst>(I))) 1781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InitializeRegForValue(I); 1791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create an initial MachineBasicBlock for each LLVM BasicBlock in F. This 1811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // also creates the initial PHI MachineInstrs, though none of the input 1821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // operands are populated. 1832aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BB = Fn.begin(), EB = Fn.end(); BB != EB; ++BB) { 1841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *MBB = new MachineBasicBlock(BB); 1851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MBBMap[BB] = MBB; 1861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MF.getBasicBlockList().push_back(MBB); 1871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create Machine PHI nodes for LLVM PHI nodes, lowering them as 1891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // appropriate. 1901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 1911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(); 192f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 193f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 194f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 195f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 196f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned PHIReg = ValueMap[PN]; 197f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner assert(PHIReg &&"PHI node does not have an assigned virtual register!"); 198f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0; i != NumElements; ++i) 199f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner BuildMI(MBB, TargetInstrInfo::PHI, PN->getNumOperands(), PHIReg+i); 200f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 2011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 2031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 2071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// SelectionDAGLowering - This is the common target-independent lowering 2081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// implementation that is parameterized by a TargetLowering object. 2091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// Also, targets can overload any lowering method. 2101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// 2111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnernamespace llvm { 2121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerclass SelectionDAGLowering { 2131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *CurMBB; 2141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, SDOperand> NodeMap; 2161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 217d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// PendingLoads - Loads are not emitted to the program immediately. We bunch 218d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// them up and then emit token factor nodes when possible. This allows us to 219d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// get simple disambiguation between loads without worrying about alias 220d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// analysis. 221d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner std::vector<SDOperand> PendingLoads; 222d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 2231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerpublic: 2241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // TLI - This is information that describes the available target features we 2251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // need for lowering. This indicates when operations are unavailable, 2261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // implemented with a libcall, etc. 2271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TargetLowering &TLI; 2281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAG &DAG; 2291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const TargetData &TD; 2301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// FuncInfo - Information about the function as a whole. 2321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// 2331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo; 2341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAGLowering(SelectionDAG &dag, TargetLowering &tli, 236edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman FunctionLoweringInfo &funcinfo) 2371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), DAG(dag), TD(DAG.getTarget().getTargetData()), 2381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo(funcinfo) { 2391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 241a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// getRoot - Return the current virtual root of the Selection DAG. 242a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// 243a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner SDOperand getRoot() { 244d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.empty()) 245d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return DAG.getRoot(); 246edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 247d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.size() == 1) { 248d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = PendingLoads[0]; 249d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 250d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 251d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 252d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 253d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 254d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Otherwise, we have to make a token factor node. 255d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = DAG.getNode(ISD::TokenFactor, MVT::Other, PendingLoads); 256d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 257d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 258d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 259a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner } 260a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 2611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(Instruction &I) { visit(I.getOpcode(), I); } 2621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(unsigned Opcode, User &I) { 2641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner switch (Opcode) { 2651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner default: assert(0 && "Unknown instruction type encountered!"); 2661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 2671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Build the switch statement using the Instruction.def file. 2681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#define HANDLE_INST(NUM, OPCODE, CLASS) \ 2691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case Instruction::OPCODE:return visit##OPCODE((CLASS&)I); 2701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instruction.def" 2711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void setCurrentBasicBlock(MachineBasicBlock *MBB) { CurMBB = MBB; } 2751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand getIntPtrConstant(uint64_t Val) { 2781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return DAG.getConstant(Val, TLI.getPointerTy()); 2791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand getValue(const Value *V) { 2821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand &N = NodeMap[V]; 2831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (N.Val) return N; 2841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType VT = TLI.getValueType(V->getType()); 2861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) 2871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { 2881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner visit(CE->getOpcode(), *CE); 2891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(N.Val && "visit didn't populate the ValueMap!"); 2901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N; 2911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (GlobalValue *GV = dyn_cast<GlobalValue>(C)) { 2921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getGlobalAddress(GV, VT); 2931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (isa<ConstantPointerNull>(C)) { 2941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstant(0, TLI.getPointerTy()); 2951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (isa<UndefValue>(C)) { 296b882752bd04602249d391699dc7183de007f8964Nate Begeman return N = DAG.getNode(ISD::UNDEF, VT); 2971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) { 2981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstantFP(CFP->getValue(), VT); 2991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 3001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Canonicalize all constant ints to be unsigned. 3011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstant(cast<ConstantIntegral>(C)->getRawValue(),VT); 3021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (const AllocaInst *AI = dyn_cast<AllocaInst>(V)) { 3051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const AllocaInst*, int>::iterator SI = 3061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo.StaticAllocaMap.find(AI); 3071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (SI != FuncInfo.StaticAllocaMap.end()) 3081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return DAG.getFrameIndex(SI->second, TLI.getPointerTy()); 3091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, unsigned>::const_iterator VMI = 3121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo.ValueMap.find(V); 3131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(VMI != FuncInfo.ValueMap.end() && "Value not in map!"); 314c8ea3c47103656a0924909f41651bf5d396c26cdChris Lattner 315d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner unsigned InReg = VMI->second; 316d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 317d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // If this type is not legal, make it so now. 318d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(VT); 319d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 320d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getCopyFromReg(DAG.getEntryNode(), InReg, DestVT); 321d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (DestVT < VT) { 322d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // Source must be expanded. This input value is actually coming from the 323d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // register pair VMI->second and VMI->second+1. 324d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::BUILD_PAIR, VT, N, 325d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner DAG.getCopyFromReg(DAG.getEntryNode(), InReg+1, DestVT)); 326d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else { 327d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (DestVT > VT) { // Promotion case 328d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (MVT::isFloatingPoint(VT)) 329d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::FP_ROUND, VT, N); 330d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner else 331d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::TRUNCATE, VT, N); 332d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 333d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 334d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 335d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return N; 3361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const SDOperand &setValue(const Value *V, SDOperand NewN) { 3391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand &N = NodeMap[V]; 3401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(N.Val == 0 && "Already set a value for this node!"); 3411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = NewN; 3421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Terminator instructions. 3451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRet(ReturnInst &I); 3461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitBr(BranchInst &I); 3471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnreachable(UnreachableInst &I) { /* noop */ } 3481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // These all get lowered before this pass. 3501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSwitch(SwitchInst &I) { assert(0 && "TODO"); } 3511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitInvoke(InvokeInst &I) { assert(0 && "TODO"); } 3521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnwind(UnwindInst &I) { assert(0 && "TODO"); } 3531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 3558f03405ee57094d627c342fb6087399a30009a02Chris Lattner void visitBinary(User &I, unsigned Opcode, bool isShift = false); 35601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner void visitAdd(User &I) { 35701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, I.getType()->isFloatingPoint() ? ISD::FADD : ISD::ADD); 35801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 359b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner void visitSub(User &I); 36001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner void visitMul(User &I) { 36101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, I.getType()->isFloatingPoint() ? ISD::FMUL : ISD::MUL); 36201b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 3631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitDiv(User &I) { 36401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner unsigned Opc; 36501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 36601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (Ty->isFloatingPoint()) 36701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::FDIV; 36801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner else if (Ty->isUnsigned()) 36901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::UDIV; 37001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner else 37101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::SDIV; 37201b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, Opc); 3731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRem(User &I) { 37501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner unsigned Opc; 37601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 37701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (Ty->isFloatingPoint()) 37801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::FREM; 37901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner else if (Ty->isUnsigned()) 38001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::UREM; 38101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner else 38201b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::SREM; 38301b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, Opc); 3841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitAnd(User &I) { visitBinary(I, ISD::AND); } 3861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitOr (User &I) { visitBinary(I, ISD::OR); } 3871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitXor(User &I) { visitBinary(I, ISD::XOR); } 3888f03405ee57094d627c342fb6087399a30009a02Chris Lattner void visitShl(User &I) { visitBinary(I, ISD::SHL, true); } 3891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitShr(User &I) { 3908f03405ee57094d627c342fb6087399a30009a02Chris Lattner visitBinary(I, I.getType()->isUnsigned() ? ISD::SRL : ISD::SRA, true); 3911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetCC(User &I, ISD::CondCode SignedOpc, ISD::CondCode UnsignedOpc); 3941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetEQ(User &I) { visitSetCC(I, ISD::SETEQ, ISD::SETEQ); } 3951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetNE(User &I) { visitSetCC(I, ISD::SETNE, ISD::SETNE); } 3961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLE(User &I) { visitSetCC(I, ISD::SETLE, ISD::SETULE); } 3971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGE(User &I) { visitSetCC(I, ISD::SETGE, ISD::SETUGE); } 3981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLT(User &I) { visitSetCC(I, ISD::SETLT, ISD::SETULT); } 3991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGT(User &I) { visitSetCC(I, ISD::SETGT, ISD::SETUGT); } 4001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitGetElementPtr(User &I); 4021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCast(User &I); 4031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSelect(User &I); 4041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 4051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitMalloc(MallocInst &I); 4071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitFree(FreeInst &I); 4081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitAlloca(AllocaInst &I); 4091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitLoad(LoadInst &I); 4101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitStore(StoreInst &I); 4111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitPHI(PHINode &I) { } // PHI nodes are handled specially. 4121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCall(CallInst &I); 4131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAStart(CallInst &I); 4151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAArg(VAArgInst &I); 4161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAEnd(CallInst &I); 4171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVACopy(CallInst &I); 41839ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner void visitFrameReturnAddress(CallInst &I, bool isFrameAddress); 4191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4207041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner void visitMemIntrinsic(CallInst &I, unsigned Op); 4211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp1(Instruction &I) { 4231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp1 should not exist at instruction selection time!"); 4241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 4251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp2(Instruction &I) { 4271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp2 should not exist at instruction selection time!"); 4281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 4291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner}; 4311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} // end namespace llvm 4321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitRet(ReturnInst &I) { 4341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getNumOperands() == 0) { 435a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, getRoot())); 4361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; 4371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 440f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner MVT::ValueType TmpVT; 441f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner 4421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner switch (Op1.getValueType()) { 4431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner default: assert(0 && "Unknown value type!"); 4441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::i1: 4451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::i8: 4461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::i16: 447f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner case MVT::i32: 448f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner // If this is a machine where 32-bits is legal or expanded, promote to 449f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner // 32-bits, otherwise, promote to 64-bits. 450f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner if (TLI.getTypeAction(MVT::i32) == TargetLowering::Promote) 451f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner TmpVT = TLI.getTypeToTransformTo(MVT::i32); 452f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner else 453f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner TmpVT = MVT::i32; 454f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner 455f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner // Extend integer types to result type. 4561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getOperand(0)->getType()->isSigned()) 457f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner Op1 = DAG.getNode(ISD::SIGN_EXTEND, TmpVT, Op1); 4581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner else 459f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner Op1 = DAG.getNode(ISD::ZERO_EXTEND, TmpVT, Op1); 4601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner break; 4611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::f32: 4621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::i64: 4631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::f64: 4641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner break; // No extension needed! 4651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 467a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, getRoot(), Op1)); 4681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 4691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitBr(BranchInst &I) { 4711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Update machine-CFG edges. 4721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[I.getSuccessor(0)]; 4731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Figure out which block is immediately after the current one. 4751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *NextBlock = 0; 4761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction::iterator BBI = CurMBB; 4771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (++BBI != CurMBB->getParent()->end()) 4781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner NextBlock = BBI; 4791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.isUnconditional()) { 4811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is not a fall-through branch, emit the branch. 4821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ0MBB != NextBlock) 483a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BR, MVT::Other, getRoot(), 484dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman DAG.getBasicBlock(Succ0MBB))); 4851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 4861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ1MBB = FuncInfo.MBBMap[I.getSuccessor(1)]; 4871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getCondition()); 4891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ1MBB == NextBlock) { 4901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is false, fall through. This means we should branch 4911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // if the condition is true to Succ #0. 492a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 493dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ0MBB))); 4941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (Succ0MBB == NextBlock) { 4951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is true, fall through. This means we should branch if 4961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the condition is false to Succ #1. Invert the condition first. 4971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand True = DAG.getConstant(1, Cond.getValueType()); 4981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Cond = DAG.getNode(ISD::XOR, Cond.getValueType(), Cond, True); 499a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 500dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ1MBB))); 5011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 502e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner std::vector<SDOperand> Ops; 503e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(getRoot()); 504e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(Cond); 505e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(DAG.getBasicBlock(Succ0MBB)); 506e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(DAG.getBasicBlock(Succ1MBB)); 507e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCONDTWOWAY, MVT::Other, Ops)); 5081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 512b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattnervoid SelectionDAGLowering::visitSub(User &I) { 513b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner // -0.0 - X --> fneg 51401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (I.getType()->isFloatingPoint()) { 51501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (ConstantFP *CFP = dyn_cast<ConstantFP>(I.getOperand(0))) 51601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (CFP->isExactlyValue(-0.0)) { 51701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 51801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner setValue(&I, DAG.getNode(ISD::FNEG, Op2.getValueType(), Op2)); 51901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner return; 52001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 52101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, ISD::FSUB); 52201b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } else { 52301b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, ISD::SUB); 52401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 525b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner} 526b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner 5278f03405ee57094d627c342fb6087399a30009a02Chris Lattnervoid SelectionDAGLowering::visitBinary(User &I, unsigned Opcode, bool isShift) { 5281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 5291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 5302c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 5318f03405ee57094d627c342fb6087399a30009a02Chris Lattner if (isShift) 532fab08875b73656f373b10a59aad475615df82bafChris Lattner Op2 = DAG.getNode(ISD::ANY_EXTEND, TLI.getShiftAmountTy(), Op2); 5332c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 5341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(Opcode, Op1.getValueType(), Op1, Op2)); 5351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSetCC(User &I,ISD::CondCode SignedOpcode, 5381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode UnsignedOpcode) { 5391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 5401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 5411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode Opcode = SignedOpcode; 5421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getOperand(0)->getType()->isUnsigned()) 5431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Opcode = UnsignedOpcode; 5447cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, Op1, Op2, Opcode)); 5451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSelect(User &I) { 5481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getOperand(0)); 5491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand TrueVal = getValue(I.getOperand(1)); 5501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand FalseVal = getValue(I.getOperand(2)); 5511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(ISD::SELECT, TrueVal.getValueType(), Cond, 5521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TrueVal, FalseVal)); 5531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCast(User &I) { 5561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 5571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType SrcTy = TLI.getValueType(I.getOperand(0)->getType()); 5581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType DestTy = TLI.getValueType(I.getType()); 5591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (N.getValueType() == DestTy) { 5611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); // noop cast. 562ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner } else if (DestTy == MVT::i1) { 563ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner // Cast to bool is a comparison against zero, not truncation to zero. 564ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner SDOperand Zero = isInteger(SrcTy) ? DAG.getConstant(0, N.getValueType()) : 565ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner DAG.getConstantFP(0.0, N.getValueType()); 5667cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, N, Zero, ISD::SETNE)); 567ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else if (isInteger(SrcTy)) { 568ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (isInteger(DestTy)) { // Int -> Int cast 569ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (DestTy < SrcTy) // Truncating cast? 570ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::TRUNCATE, DestTy, N)); 571ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else if (I.getOperand(0)->getType()->isSigned()) 572ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::SIGN_EXTEND, DestTy, N)); 573ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 574ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::ZERO_EXTEND, DestTy, N)); 575ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // Int -> FP cast 576ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getOperand(0)->getType()->isSigned()) 577ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::SINT_TO_FP, DestTy, N)); 578ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 579ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::UINT_TO_FP, DestTy, N)); 580ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 5811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 582ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner assert(isFloatingPoint(SrcTy) && "Unknown value type!"); 583ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (isFloatingPoint(DestTy)) { // FP -> FP cast 584ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (DestTy < SrcTy) // Rounding cast? 585ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_ROUND, DestTy, N)); 586ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 587ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_EXTEND, DestTy, N)); 588ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // FP -> Int cast. 589ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getType()->isSigned()) 590ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_SINT, DestTy, N)); 591ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 592ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_UINT, DestTy, N)); 593ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 5941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitGetElementPtr(User &I) { 5981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 5991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getOperand(0)->getType(); 6001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *UIntPtrTy = TD.getIntPtrType(); 6011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (GetElementPtrInst::op_iterator OI = I.op_begin()+1, E = I.op_end(); 6031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner OI != E; ++OI) { 6041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Idx = *OI; 6051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (const StructType *StTy = dyn_cast<StructType> (Ty)) { 6061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned Field = cast<ConstantUInt>(Idx)->getValue(); 6071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Field) { 6081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // N = N + Offset 6091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t Offset = TD.getStructLayout(StTy)->MemberOffsets[Field]; 6101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, 611dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman getIntPtrConstant(Offset)); 6121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = StTy->getElementType(Field); 6141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 6151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = cast<SequentialType>(Ty)->getElementType(); 6161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!isa<Constant>(Idx) || !cast<Constant>(Idx)->isNullValue()) { 6171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // N = N + Idx * ElementSize; 6181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t ElementSize = TD.getTypeSize(Ty); 6197cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner SDOperand IdxN = getValue(Idx), Scale = getIntPtrConstant(ElementSize); 6207cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner 6217cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner // If the index is smaller or larger than intptr_t, truncate or extend 6227cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner // it. 6237cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner if (IdxN.getValueType() < Scale.getValueType()) { 6247cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner if (Idx->getType()->isSigned()) 6257cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner IdxN = DAG.getNode(ISD::SIGN_EXTEND, Scale.getValueType(), IdxN); 6267cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner else 6277cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner IdxN = DAG.getNode(ISD::ZERO_EXTEND, Scale.getValueType(), IdxN); 6287cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner } else if (IdxN.getValueType() > Scale.getValueType()) 6297cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner IdxN = DAG.getNode(ISD::TRUNCATE, Scale.getValueType(), IdxN); 6307cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner 6317cc4777a263f6a52877d29201311fde5f6edb632Chris Lattner IdxN = DAG.getNode(ISD::MUL, N.getValueType(), IdxN, Scale); 6321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); 6331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); 6371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 6381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitAlloca(AllocaInst &I) { 6401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is a fixed sized alloca in the entry block of the function, 6411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // allocate it statically on the stack. 6421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (FuncInfo.StaticAllocaMap.count(&I)) 6431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; // getValue will auto-populate this. 6441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getAllocatedType(); 6461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 6471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned Align = TLI.getTargetData().getTypeAlignment(Ty); 6481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand AllocSize = getValue(I.getArraySize()); 65068cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 65168cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < AllocSize.getValueType()) 65268cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::TRUNCATE, IntPtr, AllocSize); 65368cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > AllocSize.getValueType()) 65468cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, AllocSize); 6551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 65668cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::MUL, IntPtr, AllocSize, 6571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(TySize)); 6581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle alignment. If the requested alignment is less than or equal to the 6601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment, ignore it and round the size of the allocation up to the 6611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment size. If the size is greater than the stack alignment, we 6621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // note this in the DYNAMIC_STACKALLOC node. 6631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned StackAlign = 6641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetMachine().getFrameInfo()->getStackAlignment(); 6651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Align <= StackAlign) { 6661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Align = 0; 6671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Add SA-1 to the size. 6681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::ADD, AllocSize.getValueType(), AllocSize, 6691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(StackAlign-1)); 6701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Mask out the low bits for alignment purposes. 6711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::AND, AllocSize.getValueType(), AllocSize, 6721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(~(uint64_t)(StackAlign-1))); 6731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 675adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<MVT::ValueType> VTs; 676adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(AllocSize.getValueType()); 677adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(MVT::Other); 678adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<SDOperand> Ops; 679adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getRoot()); 680adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(AllocSize); 681adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getIntPtrConstant(Align)); 682adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner SDOperand DSA = DAG.getNode(ISD::DYNAMIC_STACKALLOC, VTs, Ops); 6831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DAG.setRoot(setValue(&I, DSA).getValue(1)); 6841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Inform the Frame Information that we have just allocated a variable-sized 6861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // object. 6871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurMBB->getParent()->getFrameInfo()->CreateVariableSizedObject(); 6881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 6891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitLoad(LoadInst &I) { 6921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(0)); 693edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 694d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root; 695d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (I.isVolatile()) 696d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = getRoot(); 697d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else { 698d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Do not serialize non-volatile loads against each other. 699d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = DAG.getRoot(); 700d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 701d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 702369e6db9b6033bb60519b0ad84afeacc9ec9b416Chris Lattner SDOperand L = DAG.getLoad(TLI.getValueType(I.getType()), Root, Ptr, 70306ef88472f7bac3512e224974e87a0a456471b82Andrew Lenharth DAG.getSrcValue(I.getOperand(0))); 704d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner setValue(&I, L); 705d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 706d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (I.isVolatile()) 707d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(L.getValue(1)); 708d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else 709d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.push_back(L.getValue(1)); 7101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitStore(StoreInst &I) { 7141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *SrcV = I.getOperand(0); 7151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(SrcV); 7161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(1)); 717369e6db9b6033bb60519b0ad84afeacc9ec9b416Chris Lattner DAG.setRoot(DAG.getNode(ISD::STORE, MVT::Other, getRoot(), Src, Ptr, 71806ef88472f7bac3512e224974e87a0a456471b82Andrew Lenharth DAG.getSrcValue(I.getOperand(1)))); 7191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCall(CallInst &I) { 72264e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner const char *RenameFn = 0; 723d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner SDOperand Tmp; 7241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Function *F = I.getCalledFunction()) 725c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (F->isExternal()) 726c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner switch (F->getIntrinsicID()) { 727c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case 0: // Not an LLVM intrinsic. 728c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (F->getName() == "fabs" || F->getName() == "fabsf") { 729c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 730c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 731c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getType() == I.getOperand(1)->getType()) { 732d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = getValue(I.getOperand(1)); 733c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner setValue(&I, DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp)); 734c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner return; 735c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 736c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 737f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner else if (F->getName() == "sin" || F->getName() == "sinf") { 738f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 739f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 740f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getType() == I.getOperand(1)->getType()) { 741d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = getValue(I.getOperand(1)); 742f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FSIN, Tmp.getValueType(), Tmp)); 743f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 744f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 745f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 746f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner else if (F->getName() == "cos" || F->getName() == "cosf") { 747f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 748f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 749f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getType() == I.getOperand(1)->getType()) { 750d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = getValue(I.getOperand(1)); 751f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FCOS, Tmp.getValueType(), Tmp)); 752f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 753f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 754f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 755c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner break; 756c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::vastart: visitVAStart(I); return; 757c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::vaend: visitVAEnd(I); return; 758c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::vacopy: visitVACopy(I); return; 759c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::returnaddress: visitFrameReturnAddress(I, false); return; 760c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::frameaddress: visitFrameReturnAddress(I, true); return; 761d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner 7626c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner case Intrinsic::setjmp: 7636c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner RenameFn = "_setjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 7646c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner break; 7656c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner case Intrinsic::longjmp: 7666c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner RenameFn = "_longjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 7676c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner break; 768c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::memcpy: visitMemIntrinsic(I, ISD::MEMCPY); return; 769c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::memset: visitMemIntrinsic(I, ISD::MEMSET); return; 770c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::memmove: visitMemIntrinsic(I, ISD::MEMMOVE); return; 771edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 772d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner case Intrinsic::readport: 7731ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner case Intrinsic::readio: { 7741ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner std::vector<MVT::ValueType> VTs; 7751ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner VTs.push_back(TLI.getValueType(I.getType())); 7761ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner VTs.push_back(MVT::Other); 7771ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner std::vector<SDOperand> Ops; 7781ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner Ops.push_back(getRoot()); 7791ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner Ops.push_back(getValue(I.getOperand(1))); 780d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = DAG.getNode(F->getIntrinsicID() == Intrinsic::readport ? 7811ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner ISD::READPORT : ISD::READIO, VTs, Ops); 78200b16889ab461b7ecef1c91ade101186b7f1fce2Jeff Cohen 783d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner setValue(&I, Tmp); 784d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner DAG.setRoot(Tmp.getValue(1)); 785d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner return; 7861ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner } 787d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner case Intrinsic::writeport: 788d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner case Intrinsic::writeio: 789d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner DAG.setRoot(DAG.getNode(F->getIntrinsicID() == Intrinsic::writeport ? 790d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner ISD::WRITEPORT : ISD::WRITEIO, MVT::Other, 791d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner getRoot(), getValue(I.getOperand(1)), 792d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner getValue(I.getOperand(2)))); 793d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner return; 7947ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_stoppoint: 7957ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_region_start: 7967ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_region_end: 7977ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_func_start: 7987ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_declare: 7997ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner if (I.getType() != Type::VoidTy) 8007ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 8017ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner return; 8027ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner 803c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::isunordered: 8047cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1,getValue(I.getOperand(1)), 8057cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner getValue(I.getOperand(2)), ISD::SETUO)); 806c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner return; 807f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner 808f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner case Intrinsic::sqrt: 809f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FSQRT, 810f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner getValue(I.getOperand(1)).getValueType(), 811f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner getValue(I.getOperand(1)))); 812f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 813f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner 814d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner case Intrinsic::pcmarker: 815d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = getValue(I.getOperand(1)); 816d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner DAG.setRoot(DAG.getNode(ISD::PCMARKER, MVT::Other, getRoot(), Tmp)); 817c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner return; 818691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth case Intrinsic::cttz: 819691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth setValue(&I, DAG.getNode(ISD::CTTZ, 820691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)).getValueType(), 821691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)))); 822691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth return; 823691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth case Intrinsic::ctlz: 824691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth setValue(&I, DAG.getNode(ISD::CTLZ, 825691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)).getValueType(), 826691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)))); 827691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth return; 828691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth case Intrinsic::ctpop: 829691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth setValue(&I, DAG.getNode(ISD::CTPOP, 830691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)).getValueType(), 831691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)))); 832691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth return; 833d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner default: 834d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner std::cerr << I; 835d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner assert(0 && "This intrinsic is not implemented yet!"); 836d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner return; 837c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 838edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 83964e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner SDOperand Callee; 84064e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner if (!RenameFn) 84164e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = getValue(I.getOperand(0)); 84264e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner else 84364e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = DAG.getExternalSymbol(RenameFn, TLI.getPointerTy()); 8441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 845edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 8461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i) { 8471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Arg = I.getOperand(i); 8481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand ArgNode = getValue(Arg); 8491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(ArgNode, Arg->getType())); 8501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 851edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 8528e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const PointerType *PT = cast<PointerType>(I.getCalledValue()->getType()); 8538e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const FunctionType *FTy = cast<FunctionType>(PT->getElementType()); 854edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 855cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 8569092fa310c8b2b1645b0d448c4c34b1e8ddc131dChris Lattner TLI.LowerCallTo(getRoot(), I.getType(), FTy->isVarArg(), I.getCallingConv(), 857adf6a965a321372c640845407195594835921eb4Chris Lattner I.isTailCall(), Callee, Args, DAG); 8581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getType() != Type::VoidTy) 859cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); 860cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 8611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitMalloc(MallocInst &I) { 8641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(I.getOperand(0)); 8651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 86768cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner 86868cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < Src.getValueType()) 86968cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::TRUNCATE, IntPtr, Src); 87068cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > Src.getValueType()) 87168cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, Src); 8721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Scale the source by the type size. 8741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t ElementSize = TD.getTypeSize(I.getType()->getElementType()); 8751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src = DAG.getNode(ISD::MUL, Src.getValueType(), 8761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src, getIntPtrConstant(ElementSize)); 8771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 8791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(Src, TLI.getTargetData().getIntPtrType())); 880cf5734dddd66af9388a171b44996505ede47feedChris Lattner 881cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 882adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), I.getType(), false, CallingConv::C, true, 883cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("malloc", IntPtr), 884cf5734dddd66af9388a171b44996505ede47feedChris Lattner Args, DAG); 885cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); // Pointers always fit in registers 886cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 8871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitFree(FreeInst &I) { 8901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 8911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(getValue(I.getOperand(0)), 8921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetData().getIntPtrType())); 8931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 894cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 895adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), Type::VoidTy, false, CallingConv::C, true, 896cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("free", IntPtr), Args, DAG); 897cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 8981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 900025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// InsertAtEndOfBasicBlock - This method should be implemented by targets that 901025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// mark instructions with the 'usesCustomDAGSchedInserter' flag. These 902025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// instructions are special in various ways, which require special support to 903025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// insert. The specified MachineInstr is created but not inserted into any 904025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// basic blocks, and the scheduler passes ownership of it to this method. 905025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris LattnerMachineBasicBlock *TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI, 906025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner MachineBasicBlock *MBB) { 907025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner std::cerr << "If a target marks an instruction with " 908025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "'usesCustomDAGSchedInserter', it must implement " 909025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "TargetLowering::InsertAtEndOfBasicBlock!\n"; 910025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner abort(); 911025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner return 0; 912025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner} 913025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner 914e64e72b794cfa385372436b3c88460aeee0acbf6Chris LattnerSDOperand TargetLowering::LowerVAStart(SDOperand Chain, 915e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand VAListP, Value *VAListV, 916e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SelectionDAG &DAG) { 9171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // We have no sane default behavior, just emit a useful error message and bail 9181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // out. 91939ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::cerr << "Variable arguments handling not implemented on this target!\n"; 9201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 921e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner return SDOperand(); 9221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 924e64e72b794cfa385372436b3c88460aeee0acbf6Chris LattnerSDOperand TargetLowering::LowerVAEnd(SDOperand Chain, SDOperand LP, Value *LV, 92539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner SelectionDAG &DAG) { 92639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner // Default to a noop. 92739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner return Chain; 92839ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 92939ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 930e64e72b794cfa385372436b3c88460aeee0acbf6Chris LattnerSDOperand TargetLowering::LowerVACopy(SDOperand Chain, 931e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand SrcP, Value *SrcV, 932e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand DestP, Value *DestV, 933e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SelectionDAG &DAG) { 934e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner // Default to copying the input list. 935e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand Val = DAG.getLoad(getPointerTy(), Chain, 936e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SrcP, DAG.getSrcValue(SrcV)); 937213e557cef3e653e2d3a00b07b137c143128430aAndrew Lenharth SDOperand Result = DAG.getNode(ISD::STORE, MVT::Other, Val.getValue(1), 938e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner Val, DestP, DAG.getSrcValue(DestV)); 939e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner return Result; 94039ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 94139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 94239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnerstd::pair<SDOperand,SDOperand> 943e64e72b794cfa385372436b3c88460aeee0acbf6Chris LattnerTargetLowering::LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV, 944e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner const Type *ArgTy, SelectionDAG &DAG) { 9451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // We have no sane default behavior, just emit a useful error message and bail 9461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // out. 94739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::cerr << "Variable arguments handling not implemented on this target!\n"; 9481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 949d3f03e4b50feb6abfa9fec8b0aa705d45134c59eMisha Brukman return std::make_pair(SDOperand(), SDOperand()); 9501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 95139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 95239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 95339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitVAStart(CallInst &I) { 954e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner DAG.setRoot(TLI.LowerVAStart(getRoot(), getValue(I.getOperand(1)), 955e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner I.getOperand(1), DAG)); 95639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 95739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 9581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAArg(VAArgInst &I) { 95939ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::pair<SDOperand,SDOperand> Result = 960e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner TLI.LowerVAArg(getRoot(), getValue(I.getOperand(0)), I.getOperand(0), 961558bc88a00930fce283b240b7c9555f649a18f1bAndrew Lenharth I.getType(), DAG); 96239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner setValue(&I, Result.first); 96339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner DAG.setRoot(Result.second); 9641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAEnd(CallInst &I) { 96700b16889ab461b7ecef1c91ade101186b7f1fce2Jeff Cohen DAG.setRoot(TLI.LowerVAEnd(getRoot(), getValue(I.getOperand(1)), 968e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner I.getOperand(1), DAG)); 9691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVACopy(CallInst &I) { 972e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand Result = 973e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner TLI.LowerVACopy(getRoot(), getValue(I.getOperand(2)), I.getOperand(2), 974e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner getValue(I.getOperand(1)), I.getOperand(1), DAG); 975e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner DAG.setRoot(Result); 9761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 97939ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// It is always conservatively correct for llvm.returnaddress and 98039ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// llvm.frameaddress to return 0. 98139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnerstd::pair<SDOperand, SDOperand> 98239ae3622791986a0232f7e4797b633f8fa9e54d2Chris LattnerTargetLowering::LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, 98339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth, SelectionDAG &DAG) { 98439ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner return std::make_pair(DAG.getConstant(0, getPointerTy()), Chain); 9851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 98750381b6c4180e9a2b983d4623da2e485cd768632Chris LattnerSDOperand TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) { 988171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner assert(0 && "LowerOperation not implemented for this target!"); 989171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner abort(); 990d3f03e4b50feb6abfa9fec8b0aa705d45134c59eMisha Brukman return SDOperand(); 991171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner} 992171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner 99339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitFrameReturnAddress(CallInst &I, bool isFrame) { 99439ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth = (unsigned)cast<ConstantUInt>(I.getOperand(1))->getValue(); 99539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::pair<SDOperand,SDOperand> Result = 996a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner TLI.LowerFrameReturnAddress(isFrame, getRoot(), Depth, DAG); 99739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner setValue(&I, Result.first); 99839ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner DAG.setRoot(Result.second); 99939ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 10001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10017041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattnervoid SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) { 10027041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner std::vector<SDOperand> Ops; 1003a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner Ops.push_back(getRoot()); 10047041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner Ops.push_back(getValue(I.getOperand(1))); 10057041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner Ops.push_back(getValue(I.getOperand(2))); 10067041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner Ops.push_back(getValue(I.getOperand(3))); 10077041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner Ops.push_back(getValue(I.getOperand(4))); 10087041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner DAG.setRoot(DAG.getNode(Op, MVT::Other, Ops)); 10091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10117041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 10127041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner// SelectionDAGISel code 10137041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 10141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerunsigned SelectionDAGISel::MakeReg(MVT::ValueType VT) { 10161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return RegMap->createVirtualRegister(TLI.getRegClassFor(VT)); 10171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1019495a0b51915eb763576874f29192820b731edc22Chris Lattnervoid SelectionDAGISel::getAnalysisUsage(AnalysisUsage &AU) const { 102036b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // FIXME: we only modify the CFG to split critical edges. This 102136b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // updates dom and loop info. 1022495a0b51915eb763576874f29192820b731edc22Chris Lattner} 10231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerbool SelectionDAGISel::runOnFunction(Function &Fn) { 10261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction &MF = MachineFunction::construct(&Fn, TLI.getTargetMachine()); 10271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner RegMap = MF.getSSARegMap(); 10281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "\n\n\n=== " << Fn.getName() << "\n"); 10291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1030495a0b51915eb763576874f29192820b731edc22Chris Lattner // First pass, split all critical edges for PHI nodes with incoming values 1031495a0b51915eb763576874f29192820b731edc22Chris Lattner // that are constants, this way the load of the constant into a vreg will not 1032495a0b51915eb763576874f29192820b731edc22Chris Lattner // be placed into MBBs that are used some other way. 103336b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (Function::iterator BB = Fn.begin(), E = Fn.end(); BB != E; ++BB) { 103436b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner PHINode *PN; 103536b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (BasicBlock::iterator BBI = BB->begin(); 103636b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner (PN = dyn_cast<PHINode>(BBI)); ++BBI) 103736b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i) 103836b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner if (isa<Constant>(PN->getIncomingValue(i))) 103936b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner SplitCriticalEdge(PN->getIncomingBlock(i), BB); 104036b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner } 1041495a0b51915eb763576874f29192820b731edc22Chris Lattner 10421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo FuncInfo(TLI, Fn, MF); 10431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Function::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) 10451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectBasicBlock(I, MF, FuncInfo); 1046edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 10471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 10481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1051ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerSDOperand SelectionDAGISel:: 1052ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerCopyValueToVirtualRegister(SelectionDAGLowering &SDL, Value *V, unsigned Reg) { 1053f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner SDOperand Op = SDL.getValue(V); 105418c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner assert((Op.getOpcode() != ISD::CopyFromReg || 1055d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner cast<RegisterSDNode>(Op.getOperand(1))->getReg() != Reg) && 105618c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner "Copy from a reg to the same reg!"); 1057d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 1058d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // If this type is not legal, we must make sure to not create an invalid 1059d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // register use. 1060d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType SrcVT = Op.getValueType(); 1061d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(SrcVT); 1062d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SelectionDAG &DAG = SDL.DAG; 1063d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (SrcVT == DestVT) { 1064d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 1065d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else if (SrcVT < DestVT) { 1066d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is promoted to the register. 1067fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner if (MVT::isFloatingPoint(SrcVT)) 1068fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner Op = DAG.getNode(ISD::FP_EXTEND, DestVT, Op); 1069fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner else 1070fab08875b73656f373b10a59aad475615df82bafChris Lattner Op = DAG.getNode(ISD::ANY_EXTEND, DestVT, Op); 1071d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 1072d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else { 1073d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is expanded into multiple registers. 1074d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 1075d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(0, MVT::i32)); 1076d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 1077d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(1, MVT::i32)); 1078d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op = DAG.getCopyToReg(SDL.getRoot(), Reg, Lo); 1079d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(Op, Reg+1, Hi); 1080d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 10811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10830afa8e348eab21d3e09ae3240544886d61879266Chris Lattner/// IsOnlyUsedInOneBasicBlock - If the specified argument is only used in a 10840afa8e348eab21d3e09ae3240544886d61879266Chris Lattner/// single basic block, return that block. Otherwise, return a null pointer. 10850afa8e348eab21d3e09ae3240544886d61879266Chris Lattnerstatic BasicBlock *IsOnlyUsedInOneBasicBlock(Argument *A) { 10860afa8e348eab21d3e09ae3240544886d61879266Chris Lattner if (A->use_empty()) return 0; 10870afa8e348eab21d3e09ae3240544886d61879266Chris Lattner BasicBlock *BB = cast<Instruction>(A->use_back())->getParent(); 10880afa8e348eab21d3e09ae3240544886d61879266Chris Lattner for (Argument::use_iterator UI = A->use_begin(), E = A->use_end(); UI != E; 10890afa8e348eab21d3e09ae3240544886d61879266Chris Lattner ++UI) 10900afa8e348eab21d3e09ae3240544886d61879266Chris Lattner if (isa<PHINode>(*UI) || cast<Instruction>(*UI)->getParent() != BB) 10910afa8e348eab21d3e09ae3240544886d61879266Chris Lattner return 0; // Disagreement among the users? 1092aa781b34040f07db00fb4b59cb567e6ad9ef5861Chris Lattner 1093aa781b34040f07db00fb4b59cb567e6ad9ef5861Chris Lattner // Okay, there is a single BB user. Only permit this optimization if this is 1094aa781b34040f07db00fb4b59cb567e6ad9ef5861Chris Lattner // the entry block, otherwise, we might sink argument loads into loops and 1095aa781b34040f07db00fb4b59cb567e6ad9ef5861Chris Lattner // stuff. Later, when we have global instruction selection, this won't be an 1096aa781b34040f07db00fb4b59cb567e6ad9ef5861Chris Lattner // issue clearly. 1097aa781b34040f07db00fb4b59cb567e6ad9ef5861Chris Lattner if (BB == BB->getParent()->begin()) 1098aa781b34040f07db00fb4b59cb567e6ad9ef5861Chris Lattner return BB; 1099aa781b34040f07db00fb4b59cb567e6ad9ef5861Chris Lattner return 0; 11000afa8e348eab21d3e09ae3240544886d61879266Chris Lattner} 11010afa8e348eab21d3e09ae3240544886d61879266Chris Lattner 1102068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel:: 1103068a81e9fca511b9a3b3a0f28a8988a57f994652Chris LattnerLowerArguments(BasicBlock *BB, SelectionDAGLowering &SDL, 1104068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> &UnorderedChains) { 11051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is the entry block, emit arguments. 1106068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner Function &F = *BB->getParent(); 11070afa8e348eab21d3e09ae3240544886d61879266Chris Lattner FunctionLoweringInfo &FuncInfo = SDL.FuncInfo; 1108068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 1109068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner if (BB == &F.front()) { 11100afa8e348eab21d3e09ae3240544886d61879266Chris Lattner SDOperand OldRoot = SDL.DAG.getRoot(); 11110afa8e348eab21d3e09ae3240544886d61879266Chris Lattner 1112068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> Args = TLI.LowerArguments(F, SDL.DAG); 1113068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 11140afa8e348eab21d3e09ae3240544886d61879266Chris Lattner // If there were side effects accessing the argument list, do not do 11150afa8e348eab21d3e09ae3240544886d61879266Chris Lattner // anything special. 11160afa8e348eab21d3e09ae3240544886d61879266Chris Lattner if (OldRoot != SDL.DAG.getRoot()) { 11170afa8e348eab21d3e09ae3240544886d61879266Chris Lattner unsigned a = 0; 1118a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1119a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner AI != E; ++AI,++a) 11200afa8e348eab21d3e09ae3240544886d61879266Chris Lattner if (!AI->use_empty()) { 11210afa8e348eab21d3e09ae3240544886d61879266Chris Lattner SDL.setValue(AI, Args[a]); 11229d3a483a3826d3749c2db9863ddb6e824f1dd6d4Chris Lattner 1123fab08875b73656f373b10a59aad475615df82bafChris Lattner SDOperand Copy = 1124fab08875b73656f373b10a59aad475615df82bafChris Lattner CopyValueToVirtualRegister(SDL, AI, FuncInfo.ValueMap[AI]); 1125fab08875b73656f373b10a59aad475615df82bafChris Lattner UnorderedChains.push_back(Copy); 11260afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 11270afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } else { 11280afa8e348eab21d3e09ae3240544886d61879266Chris Lattner // Otherwise, if any argument is only accessed in a single basic block, 11290afa8e348eab21d3e09ae3240544886d61879266Chris Lattner // emit that argument only to that basic block. 11300afa8e348eab21d3e09ae3240544886d61879266Chris Lattner unsigned a = 0; 1131a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1132a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner AI != E; ++AI,++a) 11330afa8e348eab21d3e09ae3240544886d61879266Chris Lattner if (!AI->use_empty()) { 11340afa8e348eab21d3e09ae3240544886d61879266Chris Lattner if (BasicBlock *BBU = IsOnlyUsedInOneBasicBlock(AI)) { 11350afa8e348eab21d3e09ae3240544886d61879266Chris Lattner FuncInfo.BlockLocalArguments.insert(std::make_pair(BBU, 11360afa8e348eab21d3e09ae3240544886d61879266Chris Lattner std::make_pair(AI, a))); 11370afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } else { 11380afa8e348eab21d3e09ae3240544886d61879266Chris Lattner SDL.setValue(AI, Args[a]); 1139edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman SDOperand Copy = 11400afa8e348eab21d3e09ae3240544886d61879266Chris Lattner CopyValueToVirtualRegister(SDL, AI, FuncInfo.ValueMap[AI]); 11410afa8e348eab21d3e09ae3240544886d61879266Chris Lattner UnorderedChains.push_back(Copy); 11420afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 11430afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 11440afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 1145405ef9e28d955c1b107c27bedfd4be8b9165af01Chris Lattner 1146fa57702388f139e964befecb4b98c7dfe836945fChris Lattner // Next, if the function has live ins that need to be copied into vregs, 1147fa57702388f139e964befecb4b98c7dfe836945fChris Lattner // emit the copies now, into the top of the block. 1148fa57702388f139e964befecb4b98c7dfe836945fChris Lattner MachineFunction &MF = SDL.DAG.getMachineFunction(); 1149fa57702388f139e964befecb4b98c7dfe836945fChris Lattner if (MF.livein_begin() != MF.livein_end()) { 1150fa57702388f139e964befecb4b98c7dfe836945fChris Lattner SSARegMap *RegMap = MF.getSSARegMap(); 1151fa57702388f139e964befecb4b98c7dfe836945fChris Lattner const MRegisterInfo &MRI = *MF.getTarget().getRegisterInfo(); 1152fa57702388f139e964befecb4b98c7dfe836945fChris Lattner for (MachineFunction::livein_iterator LI = MF.livein_begin(), 1153fa57702388f139e964befecb4b98c7dfe836945fChris Lattner E = MF.livein_end(); LI != E; ++LI) 1154fa57702388f139e964befecb4b98c7dfe836945fChris Lattner if (LI->second) 1155fa57702388f139e964befecb4b98c7dfe836945fChris Lattner MRI.copyRegToReg(*MF.begin(), MF.begin()->end(), LI->second, 1156fa57702388f139e964befecb4b98c7dfe836945fChris Lattner LI->first, RegMap->getRegClass(LI->second)); 1157fa57702388f139e964befecb4b98c7dfe836945fChris Lattner } 1158fa57702388f139e964befecb4b98c7dfe836945fChris Lattner 1159fa57702388f139e964befecb4b98c7dfe836945fChris Lattner // Finally, if the target has anything special to do, allow it to do so. 1160405ef9e28d955c1b107c27bedfd4be8b9165af01Chris Lattner EmitFunctionEntryCode(F, SDL.DAG.getMachineFunction()); 11610afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 11621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11630afa8e348eab21d3e09ae3240544886d61879266Chris Lattner // See if there are any block-local arguments that need to be emitted in this 11640afa8e348eab21d3e09ae3240544886d61879266Chris Lattner // block. 11650afa8e348eab21d3e09ae3240544886d61879266Chris Lattner 11660afa8e348eab21d3e09ae3240544886d61879266Chris Lattner if (!FuncInfo.BlockLocalArguments.empty()) { 11670afa8e348eab21d3e09ae3240544886d61879266Chris Lattner std::multimap<BasicBlock*, std::pair<Argument*, unsigned> >::iterator BLAI = 11680afa8e348eab21d3e09ae3240544886d61879266Chris Lattner FuncInfo.BlockLocalArguments.lower_bound(BB); 11690afa8e348eab21d3e09ae3240544886d61879266Chris Lattner if (BLAI != FuncInfo.BlockLocalArguments.end() && BLAI->first == BB) { 11700afa8e348eab21d3e09ae3240544886d61879266Chris Lattner // Lower the arguments into this block. 11710afa8e348eab21d3e09ae3240544886d61879266Chris Lattner std::vector<SDOperand> Args = TLI.LowerArguments(F, SDL.DAG); 1172edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 11730afa8e348eab21d3e09ae3240544886d61879266Chris Lattner // Set up the value mapping for the local arguments. 11740afa8e348eab21d3e09ae3240544886d61879266Chris Lattner for (; BLAI != FuncInfo.BlockLocalArguments.end() && BLAI->first == BB; 11750afa8e348eab21d3e09ae3240544886d61879266Chris Lattner ++BLAI) 11760afa8e348eab21d3e09ae3240544886d61879266Chris Lattner SDL.setValue(BLAI->second.first, Args[BLAI->second.second]); 1177edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 11780afa8e348eab21d3e09ae3240544886d61879266Chris Lattner // Any dead arguments will just be ignored here. 11790afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 11801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1181068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner} 1182068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 1183068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 1184068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB, 1185068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > &PHINodesToUpdate, 1186068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner FunctionLoweringInfo &FuncInfo) { 1187068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner SelectionDAGLowering SDL(DAG, TLI, FuncInfo); 1188068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 1189068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> UnorderedChains; 1190edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1191068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner // Lower any arguments needed in this block. 1192068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner LowerArguments(LLVMBB, SDL, UnorderedChains); 11931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BB = FuncInfo.MBBMap[LLVMBB]; 11951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.setCurrentBasicBlock(BB); 11961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower all of the non-terminator instructions. 11981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = --LLVMBB->end(); 11991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner I != E; ++I) 12001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*I); 12011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Ensure that all instructions which are used outside of their defining 12031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // blocks are available as virtual registers. 12041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = LLVMBB->end(); I != E;++I) 1205f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner if (!I->use_empty() && !isa<PHINode>(I)) { 1206ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner std::map<const Value*, unsigned>::iterator VMI =FuncInfo.ValueMap.find(I); 12071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (VMI != FuncInfo.ValueMap.end()) 1208ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 1209ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, I, VMI->second)); 12101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 12111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle PHI nodes in successor blocks. Emit code into the SelectionDAG to 12131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // ensure constants are generated when needed. Remember the virtual registers 12141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // that need to be added to the Machine PHI nodes as input. We cannot just 12151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // directly add them, because expansion might result in multiple MBB's for one 12161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // BB. As such, the start of the BB might correspond to a different MBB than 12171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the end. 1218edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman // 12191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Emit constants only once even if used by multiple PHI nodes. 12211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<Constant*, unsigned> ConstantsOut; 12221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Check successor nodes PHI nodes that expect a constant to be available from 12241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // this block. 12251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 12261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { 12271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *SuccBB = TI->getSuccessor(succ); 12281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock::iterator MBBI = FuncInfo.MBBMap[SuccBB]->begin(); 12291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 12301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // At this point we know that there is a 1-1 correspondence between LLVM PHI 12321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // nodes and Machine PHI nodes, but the incoming operands have not been 12331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // emitted yet. 12341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = SuccBB->begin(); 1235f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 1236f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 1237f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned Reg; 1238f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB); 1239f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (Constant *C = dyn_cast<Constant>(PHIOp)) { 1240f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned &RegOut = ConstantsOut[C]; 1241f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (RegOut == 0) { 1242f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner RegOut = FuncInfo.CreateRegForValue(C); 1243ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 1244ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, C, RegOut)); 1245f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 1246f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = RegOut; 1247f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } else { 1248f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = FuncInfo.ValueMap[PHIOp]; 1249ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner if (Reg == 0) { 1250edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman assert(isa<AllocaInst>(PHIOp) && 1251ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(PHIOp)) && 1252ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner "Didn't codegen value into a register!??"); 1253ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner Reg = FuncInfo.CreateRegForValue(PHIOp); 1254ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 1255ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, PHIOp, Reg)); 1256ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner } 12571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1258edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1259f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // Remember that this register needs to added to the machine PHI node as 1260f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // the input for this MBB. 1261f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 1262f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 1263f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0, e = NumElements; i != e; ++i) 1264f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg+i)); 12651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 12661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 12671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ConstantsOut.clear(); 12681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1269ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner // Turn all of the unordered chains into one factored node. 12705a6c6d98d561df671350a56c8031a3611f1c46faChris Lattner if (!UnorderedChains.empty()) { 1271d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner UnorderedChains.push_back(SDL.getRoot()); 1272ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, UnorderedChains)); 1273ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner } 1274ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner 12751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower the terminator after the copies are emitted. 12761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*LLVMBB->getTerminator()); 1277a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 1278a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner // Make sure the root of the DAG is up-to-date. 1279a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(SDL.getRoot()); 12801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 12811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF, 12831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo) { 1284ac9dc08c7f0ae60c125624d72c3022025d79ee9eChris Lattner SelectionDAG DAG(TLI, MF); 12851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurDAG = &DAG; 12861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > PHINodesToUpdate; 12871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // First step, lower LLVM code to some DAG. This DAG may use operations and 12891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // types that are not supported by the target. 12901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BuildSelectionDAG(DAG, LLVMBB, PHINodesToUpdate, FuncInfo); 12911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12922300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman // Run the DAG combiner in pre-legalize mode, if we are told to do so 12932300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman if (CombinerEnabled) DAG.Combine(false); 12942300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 12951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Lowered selection DAG:\n"); 12961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 12971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Second step, hack on the DAG until it only uses operations and types that 12991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the target supports. 1300ac9dc08c7f0ae60c125624d72c3022025d79ee9eChris Lattner DAG.Legalize(); 13011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 13021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Legalized selection DAG:\n"); 13031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 13041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 130582cfa5d616ff0f760425cbf6e2983fbab618fbdaChris Lattner if (ViewDAGs) DAG.viewGraph(); 130682cfa5d616ff0f760425cbf6e2983fbab618fbdaChris Lattner 13072300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman // Run the DAG combiner in post-legalize mode, if we are told to do so 13082300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman if (CombinerEnabled) DAG.Combine(true); 13092300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 1310a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Third, instruction select all of the operations to machine code, adding the 1311a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // code to the MachineBasicBlock. 13121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InstructionSelectBasicBlock(DAG); 13131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 13141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Selected machine code:\n"); 13151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(BB->dump()); 13161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1317a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Next, now that we know what the last MBB the LLVM BB expanded is, update 13181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // PHI nodes in successors. 13191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 0, e = PHINodesToUpdate.size(); i != e; ++i) { 13201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineInstr *PHI = PHINodesToUpdate[i].first; 13211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(PHI->getOpcode() == TargetInstrInfo::PHI && 13221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner "This is not a machine PHI node that we are updating!"); 13231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addRegOperand(PHINodesToUpdate[i].second); 13241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addMachineBasicBlockOperand(BB); 13251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1326a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner 1327a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Finally, add the CFG edges from the last selected MBB to the successor 1328a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // MBBs. 1329a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 1330a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i) { 1331a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[TI->getSuccessor(i)]; 1332a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner BB->addSuccessor(Succ0MBB); 1333a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner } 13341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1335