InstrEmitter.cpp revision 962021bc7f6721c20c7dfe8ca809e2d98b1c554a
1bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman//==--- InstrEmitter.cpp - Emit MachineInstrs for the SelectionDAG class ---==// 294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman// 394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman// The LLVM Compiler Infrastructure 494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman// 594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman// This file is distributed under the University of Illinois Open Source 694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman// License. See LICENSE.TXT for details. 794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman// 894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman//===----------------------------------------------------------------------===// 994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman// 10bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman// This implements the Emit routines for the SelectionDAG class, which creates 11bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman// MachineInstrs based on the decisions of the SelectionDAG instruction 12bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman// selection. 1394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman// 1494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman//===----------------------------------------------------------------------===// 1594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 16bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman#define DEBUG_TYPE "instr-emitter" 17bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman#include "InstrEmitter.h" 18a8efe28a44996978faa42a387f1a6087a7b942c7Evan Cheng#include "SDNodeDbgValue.h" 1994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/CodeGen/MachineConstantPool.h" 2094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/CodeGen/MachineFunction.h" 2194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/CodeGen/MachineInstrBuilder.h" 2294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/CodeGen/MachineRegisterInfo.h" 2394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/Target/TargetData.h" 2494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/Target/TargetMachine.h" 2594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/Target/TargetInstrInfo.h" 2694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/Target/TargetLowering.h" 2794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/ADT/Statistic.h" 2894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/Support/Debug.h" 29c25e7581b9b8088910da31702d4ca21c4734c6d7Torok Edwin#include "llvm/Support/ErrorHandling.h" 3094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#include "llvm/Support/MathExtras.h" 3194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohmanusing namespace llvm; 3294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 33bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman/// CountResults - The results of target nodes have register or immediate 34bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman/// operands first, then an optional chain, and optional flag operands (which do 35bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman/// not go into the resulting MachineInstr). 36bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohmanunsigned InstrEmitter::CountResults(SDNode *Node) { 37bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman unsigned N = Node->getNumValues(); 38bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman while (N && Node->getValueType(N - 1) == MVT::Flag) 39bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman --N; 40bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman if (N && Node->getValueType(N - 1) == MVT::Other) 41bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman --N; // Skip over chain result. 42bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman return N; 43bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman} 44bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman 45bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman/// CountOperands - The inputs to target nodes have any actual inputs first, 46bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman/// followed by an optional chain operand, then an optional flag operand. 47bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman/// Compute the number of actual operands that will go into the resulting 48bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman/// MachineInstr. 49bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohmanunsigned InstrEmitter::CountOperands(SDNode *Node) { 50bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman unsigned N = Node->getNumOperands(); 51bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman while (N && Node->getOperand(N - 1).getValueType() == MVT::Flag) 52bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman --N; 53bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman if (N && Node->getOperand(N - 1).getValueType() == MVT::Other) 54bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman --N; // Ignore chain if it exists. 55bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman return N; 56bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman} 57bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman 5894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// EmitCopyFromReg - Generate machine code for an CopyFromReg node or an 5994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// implicit physical register output. 60bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohmanvoid InstrEmitter:: 615202312d2ed5078b0451838ee2661f4eb5ff2ef9Chris LattnerEmitCopyFromReg(SDNode *Node, unsigned ResNo, bool IsClone, bool IsCloned, 625202312d2ed5078b0451838ee2661f4eb5ff2ef9Chris Lattner unsigned SrcReg, DenseMap<SDValue, unsigned> &VRBaseMap) { 6394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned VRBase = 0; 6494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (TargetRegisterInfo::isVirtualRegister(SrcReg)) { 6594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Just use the input register directly! 6694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDValue Op(Node, ResNo); 6794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (IsClone) 6894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman VRBaseMap.erase(Op); 6994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman bool isNew = VRBaseMap.insert(std::make_pair(Op, SrcReg)).second; 7094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman isNew = isNew; // Silence compiler warning. 7194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman assert(isNew && "Node emitted out of order - early"); 7294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman return; 7394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 7494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 7594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // If the node is only used by a CopyToReg and the dest reg is a vreg, use 7694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // the CopyToReg'd destination register instead of creating a new vreg. 7794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman bool MatchReg = true; 781cd332725f7e5fc93f08a8d3ed9806827e9b5509Evan Cheng const TargetRegisterClass *UseRC = NULL; 79e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng if (!IsClone && !IsCloned) 80e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng for (SDNode::use_iterator UI = Node->use_begin(), E = Node->use_end(); 81e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng UI != E; ++UI) { 82e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng SDNode *User = *UI; 83e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng bool Match = true; 84e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng if (User->getOpcode() == ISD::CopyToReg && 85e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng User->getOperand(2).getNode() == Node && 86e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng User->getOperand(2).getResNo() == ResNo) { 87e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng unsigned DestReg = cast<RegisterSDNode>(User->getOperand(1))->getReg(); 88e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng if (TargetRegisterInfo::isVirtualRegister(DestReg)) { 89e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng VRBase = DestReg; 90e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng Match = false; 91e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng } else if (DestReg != SrcReg) 92e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng Match = false; 93e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng } else { 94e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i) { 95e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng SDValue Op = User->getOperand(i); 96e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng if (Op.getNode() != Node || Op.getResNo() != ResNo) 97e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng continue; 98e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT VT = Node->getValueType(Op.getResNo()); 99825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::Other || VT == MVT::Flag) 100e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng continue; 101e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng Match = false; 102e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng if (User->isMachineOpcode()) { 103e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng const TargetInstrDesc &II = TII->get(User->getMachineOpcode()); 1042a3868849438a0a0ad4f9a50f2b94eb1639b554eChris Lattner const TargetRegisterClass *RC = 0; 1052a3868849438a0a0ad4f9a50f2b94eb1639b554eChris Lattner if (i+II.getNumDefs() < II.getNumOperands()) 1062a3868849438a0a0ad4f9a50f2b94eb1639b554eChris Lattner RC = II.OpInfo[i+II.getNumDefs()].getRegClass(TRI); 107e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng if (!UseRC) 108e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng UseRC = RC; 109f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman else if (RC) { 110f7e8af925cee687b94ed4b84235cf0efed75a68bJakob Stoklund Olesen const TargetRegisterClass *ComRC = getCommonSubClass(UseRC, RC); 111f7e8af925cee687b94ed4b84235cf0efed75a68bJakob Stoklund Olesen // If multiple uses expect disjoint register classes, we emit 112f7e8af925cee687b94ed4b84235cf0efed75a68bJakob Stoklund Olesen // copies in AddRegisterOperand. 113f7e8af925cee687b94ed4b84235cf0efed75a68bJakob Stoklund Olesen if (ComRC) 114f7e8af925cee687b94ed4b84235cf0efed75a68bJakob Stoklund Olesen UseRC = ComRC; 115f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman } 116e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng } 1171cd332725f7e5fc93f08a8d3ed9806827e9b5509Evan Cheng } 11894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 119e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng MatchReg &= Match; 120e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng if (VRBase) 121e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng break; 12294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 12394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 124e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT VT = Node->getValueType(ResNo); 12594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman const TargetRegisterClass *SrcRC = 0, *DstRC = 0; 1261cd332725f7e5fc93f08a8d3ed9806827e9b5509Evan Cheng SrcRC = TRI->getPhysicalRegisterRegClass(SrcReg, VT); 12794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 12894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Figure out the register class to create for the destreg. 12994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (VRBase) { 130bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman DstRC = MRI->getRegClass(VRBase); 1311cd332725f7e5fc93f08a8d3ed9806827e9b5509Evan Cheng } else if (UseRC) { 1321cd332725f7e5fc93f08a8d3ed9806827e9b5509Evan Cheng assert(UseRC->hasType(VT) && "Incompatible phys register def and uses!"); 1331cd332725f7e5fc93f08a8d3ed9806827e9b5509Evan Cheng DstRC = UseRC; 13494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else { 1351cd332725f7e5fc93f08a8d3ed9806827e9b5509Evan Cheng DstRC = TLI->getRegClassFor(VT); 13694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 13794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 13894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // If all uses are reading from the src physical register and copying the 13994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // register is either impossible or very expensive, then don't create a copy. 14094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (MatchReg && SrcRC->getCopyCost() < 0) { 14194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman VRBase = SrcReg; 14294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else { 14394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Create the reg, emit the copy. 144bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman VRBase = MRI->createVirtualRegister(DstRC); 145bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman bool Emitted = TII->copyRegToReg(*MBB, InsertPos, VRBase, SrcReg, 14647ac0f0c7c39289f5970688154e385be22b7f293Dan Gohman DstRC, SrcRC); 147f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 148f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman assert(Emitted && "Unable to issue a copy instruction!\n"); 1498c562e2d25d319f8bde7a1a60142203f316a2883Daniel Dunbar (void) Emitted; 15094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 15194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 15294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDValue Op(Node, ResNo); 15394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (IsClone) 15494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman VRBaseMap.erase(Op); 15594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman bool isNew = VRBaseMap.insert(std::make_pair(Op, VRBase)).second; 15694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman isNew = isNew; // Silence compiler warning. 15794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman assert(isNew && "Node emitted out of order - early"); 15894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman} 15994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 16094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// getDstOfCopyToRegUse - If the only use of the specified result number of 16194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// node is a CopyToReg, return its destination register. Return 0 otherwise. 162bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohmanunsigned InstrEmitter::getDstOfOnlyCopyToRegUse(SDNode *Node, 163bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman unsigned ResNo) const { 16494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (!Node->hasOneUse()) 16594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman return 0; 16694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 16794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDNode *User = *Node->use_begin(); 16894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (User->getOpcode() == ISD::CopyToReg && 16994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman User->getOperand(2).getNode() == Node && 17094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman User->getOperand(2).getResNo() == ResNo) { 17194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned Reg = cast<RegisterSDNode>(User->getOperand(1))->getReg(); 17294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (TargetRegisterInfo::isVirtualRegister(Reg)) 17394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman return Reg; 17494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 17594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman return 0; 17694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman} 17794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 178bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohmanvoid InstrEmitter::CreateVirtualRegisters(SDNode *Node, MachineInstr *MI, 179e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng const TargetInstrDesc &II, 180e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng bool IsClone, bool IsCloned, 1815c3c5a4d9c21e73f7a0e11d77a85997c9f34f2baEvan Cheng DenseMap<SDValue, unsigned> &VRBaseMap) { 182518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner assert(Node->getMachineOpcode() != TargetOpcode::IMPLICIT_DEF && 18394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman "IMPLICIT_DEF should have been handled as a special case elsewhere!"); 18494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 18594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman for (unsigned i = 0; i < II.getNumDefs(); ++i) { 18694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // If the specific node value is only used by a CopyToReg and the dest reg 187f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman // is a vreg in the same register class, use the CopyToReg'd destination 188f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman // register instead of creating a new vreg. 18994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned VRBase = 0; 1902a3868849438a0a0ad4f9a50f2b94eb1639b554eChris Lattner const TargetRegisterClass *RC = II.OpInfo[i].getRegClass(TRI); 1918955e93b1ffa7645beea0b51e4b091b96063f613Evan Cheng if (II.OpInfo[i].isOptionalDef()) { 1928955e93b1ffa7645beea0b51e4b091b96063f613Evan Cheng // Optional def must be a physical register. 1938955e93b1ffa7645beea0b51e4b091b96063f613Evan Cheng unsigned NumResults = CountResults(Node); 1948955e93b1ffa7645beea0b51e4b091b96063f613Evan Cheng VRBase = cast<RegisterSDNode>(Node->getOperand(i-NumResults))->getReg(); 1958955e93b1ffa7645beea0b51e4b091b96063f613Evan Cheng assert(TargetRegisterInfo::isPhysicalRegister(VRBase)); 1968955e93b1ffa7645beea0b51e4b091b96063f613Evan Cheng MI->addOperand(MachineOperand::CreateReg(VRBase, true)); 1978955e93b1ffa7645beea0b51e4b091b96063f613Evan Cheng } 198e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng 1998955e93b1ffa7645beea0b51e4b091b96063f613Evan Cheng if (!VRBase && !IsClone && !IsCloned) 200e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng for (SDNode::use_iterator UI = Node->use_begin(), E = Node->use_end(); 201e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng UI != E; ++UI) { 202e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng SDNode *User = *UI; 203e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng if (User->getOpcode() == ISD::CopyToReg && 204e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng User->getOperand(2).getNode() == Node && 205e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng User->getOperand(2).getResNo() == i) { 206e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng unsigned Reg = cast<RegisterSDNode>(User->getOperand(1))->getReg(); 207e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng if (TargetRegisterInfo::isVirtualRegister(Reg)) { 208bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman const TargetRegisterClass *RegRC = MRI->getRegClass(Reg); 209f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman if (RegRC == RC) { 210f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman VRBase = Reg; 211f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman MI->addOperand(MachineOperand::CreateReg(Reg, true)); 212f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman break; 213f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman } 214e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng } 21594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 21694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 21794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 21894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Create the result registers for this node and add the result regs to 21994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // the machine instruction. 22094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (VRBase == 0) { 22194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman assert(RC && "Isn't a register operand!"); 222bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman VRBase = MRI->createVirtualRegister(RC); 22394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateReg(VRBase, true)); 22494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 22594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 22694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDValue Op(Node, i); 2275c3c5a4d9c21e73f7a0e11d77a85997c9f34f2baEvan Cheng if (IsClone) 2285c3c5a4d9c21e73f7a0e11d77a85997c9f34f2baEvan Cheng VRBaseMap.erase(Op); 22994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman bool isNew = VRBaseMap.insert(std::make_pair(Op, VRBase)).second; 23094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman isNew = isNew; // Silence compiler warning. 23194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman assert(isNew && "Node emitted out of order - early"); 23294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 23394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman} 23494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 23594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// getVR - Return the virtual register corresponding to the specified result 23694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// of the specified node. 237bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohmanunsigned InstrEmitter::getVR(SDValue Op, 238bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman DenseMap<SDValue, unsigned> &VRBaseMap) { 23994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (Op.isMachineOpcode() && 240518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner Op.getMachineOpcode() == TargetOpcode::IMPLICIT_DEF) { 24194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Add an IMPLICIT_DEF instruction before every use. 24294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned VReg = getDstOfOnlyCopyToRegUse(Op.getNode(), Op.getResNo()); 24394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // IMPLICIT_DEF can produce any type of result so its TargetInstrDesc 24494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // does not include operand register class info. 24594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (!VReg) { 24694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman const TargetRegisterClass *RC = TLI->getRegClassFor(Op.getValueType()); 247bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman VReg = MRI->createVirtualRegister(RC); 24894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 249bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman BuildMI(MBB, Op.getDebugLoc(), 250518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner TII->get(TargetOpcode::IMPLICIT_DEF), VReg); 25194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman return VReg; 25294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 25394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 25494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman DenseMap<SDValue, unsigned>::iterator I = VRBaseMap.find(Op); 25594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman assert(I != VRBaseMap.end() && "Node emitted out of order - late"); 25694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman return I->second; 25794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman} 25894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 25994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 260f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman/// AddRegisterOperand - Add the specified register as an operand to the 261f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman/// specified machine instr. Insert register copies if the register is 262f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman/// not in the required register class. 263f8c7394781f7cf27ac52ca087e289436d36844daDan Gohmanvoid 264bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan GohmanInstrEmitter::AddRegisterOperand(MachineInstr *MI, SDValue Op, 265bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman unsigned IIOpNum, 266bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman const TargetInstrDesc *II, 267bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng DenseMap<SDValue, unsigned> &VRBaseMap, 268bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng bool IsDebug) { 269825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson assert(Op.getValueType() != MVT::Other && 270825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson Op.getValueType() != MVT::Flag && 271f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman "Chain and flag operands should occur at end of operand list!"); 272f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman // Get/emit the operand. 273f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman unsigned VReg = getVR(Op, VRBaseMap); 274f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman assert(TargetRegisterInfo::isVirtualRegister(VReg) && "Not a vreg?"); 275f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 276f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman const TargetInstrDesc &TID = MI->getDesc(); 277f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman bool isOptDef = IIOpNum < TID.getNumOperands() && 278f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman TID.OpInfo[IIOpNum].isOptionalDef(); 279f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 280f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman // If the instruction requires a register in a different class, create 281f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman // a new virtual register and copy the value into it. 282f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman if (II) { 283bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman const TargetRegisterClass *SrcRC = MRI->getRegClass(VReg); 2842a3868849438a0a0ad4f9a50f2b94eb1639b554eChris Lattner const TargetRegisterClass *DstRC = 0; 2852a3868849438a0a0ad4f9a50f2b94eb1639b554eChris Lattner if (IIOpNum < II->getNumOperands()) 2862a3868849438a0a0ad4f9a50f2b94eb1639b554eChris Lattner DstRC = II->OpInfo[IIOpNum].getRegClass(TRI); 287f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman assert((DstRC || (TID.isVariadic() && IIOpNum >= TID.getNumOperands())) && 288f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman "Don't have operand info for this instruction!"); 289f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman if (DstRC && SrcRC != DstRC && !SrcRC->hasSuperClass(DstRC)) { 290bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman unsigned NewVReg = MRI->createVirtualRegister(DstRC); 291bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman bool Emitted = TII->copyRegToReg(*MBB, InsertPos, NewVReg, VReg, 292f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman DstRC, SrcRC); 293f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman assert(Emitted && "Unable to issue a copy instruction!\n"); 2948c562e2d25d319f8bde7a1a60142203f316a2883Daniel Dunbar (void) Emitted; 295f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman VReg = NewVReg; 296f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman } 297f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman } 298f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 299bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng MI->addOperand(MachineOperand::CreateReg(VReg, isOptDef, 300bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng false/*isImp*/, false/*isKill*/, 301bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng false/*isDead*/, false/*isUndef*/, 302bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng false/*isEarlyClobber*/, 303bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng 0/*SubReg*/, IsDebug)); 304f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman} 305f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 30694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// AddOperand - Add the specified operand to the specified machine instr. II 30794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// specifies the instruction information for the node, and IIOpNum is the 30894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// operand number (in the II) that we are adding. IIOpNum and II are used for 30994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// assertions only. 310bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohmanvoid InstrEmitter::AddOperand(MachineInstr *MI, SDValue Op, 311bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman unsigned IIOpNum, 312bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman const TargetInstrDesc *II, 313bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng DenseMap<SDValue, unsigned> &VRBaseMap, 314bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng bool IsDebug) { 31594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (Op.isMachineOpcode()) { 316bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng AddRegisterOperand(MI, Op, IIOpNum, II, VRBaseMap, IsDebug); 31794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) { 318d842962e27b10b6831c2421fa257e3fd58a85b18Chris Lattner MI->addOperand(MachineOperand::CreateImm(C->getSExtValue())); 31994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else if (ConstantFPSDNode *F = dyn_cast<ConstantFPSDNode>(Op)) { 3204fbd796a1251a27e6590765a0a34876f436a0af9Dan Gohman const ConstantFP *CFP = F->getConstantFPValue(); 32194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateFPImm(CFP)); 32294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else if (RegisterSDNode *R = dyn_cast<RegisterSDNode>(Op)) { 32386b49f8e2de796cb46c7c8b6a4c4900533fd53f4Dale Johannesen MI->addOperand(MachineOperand::CreateReg(R->getReg(), false)); 32494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else if (GlobalAddressSDNode *TGA = dyn_cast<GlobalAddressSDNode>(Op)) { 3256ec66dba123a46a4006e0169d9edb8f5d9e1fbdcChris Lattner MI->addOperand(MachineOperand::CreateGA(TGA->getGlobal(), TGA->getOffset(), 3266ec66dba123a46a4006e0169d9edb8f5d9e1fbdcChris Lattner TGA->getTargetFlags())); 327f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman } else if (BasicBlockSDNode *BBNode = dyn_cast<BasicBlockSDNode>(Op)) { 328f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman MI->addOperand(MachineOperand::CreateMBB(BBNode->getBasicBlock())); 32994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(Op)) { 33094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateFI(FI->getIndex())); 33194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else if (JumpTableSDNode *JT = dyn_cast<JumpTableSDNode>(Op)) { 3326ec66dba123a46a4006e0169d9edb8f5d9e1fbdcChris Lattner MI->addOperand(MachineOperand::CreateJTI(JT->getIndex(), 3336ec66dba123a46a4006e0169d9edb8f5d9e1fbdcChris Lattner JT->getTargetFlags())); 33494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Op)) { 33594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman int Offset = CP->getOffset(); 33694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned Align = CP->getAlignment(); 33794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman const Type *Type = CP->getType(); 33894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // MachineConstantPool wants an explicit alignment. 33994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (Align == 0) { 340bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman Align = TM->getTargetData()->getPrefTypeAlignment(Type); 34194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (Align == 0) { 34294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Alignment of vector types. FIXME! 343bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman Align = TM->getTargetData()->getTypeAllocSize(Type); 34494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 34594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 34694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 34794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned Idx; 348bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MachineConstantPool *MCP = MF->getConstantPool(); 34994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (CP->isMachineConstantPoolEntry()) 350bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman Idx = MCP->getConstantPoolIndex(CP->getMachineCPVal(), Align); 35194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman else 352bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman Idx = MCP->getConstantPoolIndex(CP->getConstVal(), Align); 3536ec66dba123a46a4006e0169d9edb8f5d9e1fbdcChris Lattner MI->addOperand(MachineOperand::CreateCPI(Idx, Offset, 3546ec66dba123a46a4006e0169d9edb8f5d9e1fbdcChris Lattner CP->getTargetFlags())); 355056292fd738924f3f7703725d8f630983794b5a5Bill Wendling } else if (ExternalSymbolSDNode *ES = dyn_cast<ExternalSymbolSDNode>(Op)) { 35631e2c7b4c13c2f31774614b1124533628958d0cdDaniel Dunbar MI->addOperand(MachineOperand::CreateES(ES->getSymbol(), 3576ec66dba123a46a4006e0169d9edb8f5d9e1fbdcChris Lattner ES->getTargetFlags())); 3588c2b52552c90f39e4b2fed43e309e599e742b6acDan Gohman } else if (BlockAddressSDNode *BA = dyn_cast<BlockAddressSDNode>(Op)) { 35929cbade25aa094ca9a149a96a8614cf6f3247480Dan Gohman MI->addOperand(MachineOperand::CreateBA(BA->getBlockAddress(), 36029cbade25aa094ca9a149a96a8614cf6f3247480Dan Gohman BA->getTargetFlags())); 36194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else { 362825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson assert(Op.getValueType() != MVT::Other && 363825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson Op.getValueType() != MVT::Flag && 36494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman "Chain and flag operands should occur at end of operand list!"); 365bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng AddRegisterOperand(MI, Op, IIOpNum, II, VRBaseMap, IsDebug); 366f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman } 367f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman} 368f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 369f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman/// getSuperRegisterRegClass - Returns the register class of a superreg A whose 370f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman/// "SubIdx"'th sub-register class is the specified register class and whose 371f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman/// type matches the specified type. 372f8c7394781f7cf27ac52ca087e289436d36844daDan Gohmanstatic const TargetRegisterClass* 373f8c7394781f7cf27ac52ca087e289436d36844daDan GohmangetSuperRegisterRegClass(const TargetRegisterClass *TRC, 374e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson unsigned SubIdx, EVT VT) { 375f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman // Pick the register class of the superegister for this type 376f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman for (TargetRegisterInfo::regclass_iterator I = TRC->superregclasses_begin(), 377f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman E = TRC->superregclasses_end(); I != E; ++I) 378fa4677b483b85217ac216f7e8d401c40cbe348aaJakob Stoklund Olesen if ((*I)->hasType(VT) && (*I)->getSubRegisterRegClass(SubIdx) == TRC) 379f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman return *I; 380f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman assert(false && "Couldn't find the register class"); 381f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman return 0; 38294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman} 38394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 38494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// EmitSubregNode - Generate machine code for subreg nodes. 38594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// 386bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohmanvoid InstrEmitter::EmitSubregNode(SDNode *Node, 387bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman DenseMap<SDValue, unsigned> &VRBaseMap){ 38894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned VRBase = 0; 38994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned Opc = Node->getMachineOpcode(); 39094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 39194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // If the node is only used by a CopyToReg and the dest reg is a vreg, use 39294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // the CopyToReg'd destination register instead of creating a new vreg. 39394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman for (SDNode::use_iterator UI = Node->use_begin(), E = Node->use_end(); 39494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman UI != E; ++UI) { 39594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDNode *User = *UI; 39694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (User->getOpcode() == ISD::CopyToReg && 39794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman User->getOperand(2).getNode() == Node) { 39894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned DestReg = cast<RegisterSDNode>(User->getOperand(1))->getReg(); 39994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (TargetRegisterInfo::isVirtualRegister(DestReg)) { 40094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman VRBase = DestReg; 40194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 40294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 40394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 40494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 40594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 406518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner if (Opc == TargetOpcode::EXTRACT_SUBREG) { 407f5aeb1a8e4cf272c7348376d185ef8d8267653e0Dan Gohman unsigned SubIdx = cast<ConstantSDNode>(Node->getOperand(1))->getZExtValue(); 40894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 40994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Create the extract_subreg machine instruction. 410bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MachineInstr *MI = BuildMI(*MF, Node->getDebugLoc(), 411518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner TII->get(TargetOpcode::EXTRACT_SUBREG)); 41294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 41394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Figure out the register class to create for the destreg. 414f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman unsigned VReg = getVR(Node->getOperand(0), VRBaseMap); 415bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman const TargetRegisterClass *TRC = MRI->getRegClass(VReg); 416fa4677b483b85217ac216f7e8d401c40cbe348aaJakob Stoklund Olesen const TargetRegisterClass *SRC = TRC->getSubRegisterRegClass(SubIdx); 417fa4677b483b85217ac216f7e8d401c40cbe348aaJakob Stoklund Olesen assert(SRC && "Invalid subregister index in EXTRACT_SUBREG"); 41894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 4195ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman // Figure out the register class to create for the destreg. 4205ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman // Note that if we're going to directly use an existing register, 4215ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman // it must be precisely the required class, and not a subclass 4225ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman // thereof. 423bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman if (VRBase == 0 || SRC != MRI->getRegClass(VRBase)) { 42494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Create the reg 42594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman assert(SRC && "Couldn't find source register class"); 426bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman VRBase = MRI->createVirtualRegister(SRC); 42794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 4285ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman 42994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Add def, source, and subreg index 43094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateReg(VRBase, true)); 43194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman AddOperand(MI, Node->getOperand(0), 0, 0, VRBaseMap); 43294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateImm(SubIdx)); 433bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MBB->insert(InsertPos, MI); 434518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner } else if (Opc == TargetOpcode::INSERT_SUBREG || 435518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner Opc == TargetOpcode::SUBREG_TO_REG) { 43694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDValue N0 = Node->getOperand(0); 43794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDValue N1 = Node->getOperand(1); 43894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDValue N2 = Node->getOperand(2); 439f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman unsigned SubReg = getVR(N1, VRBaseMap); 440f5aeb1a8e4cf272c7348376d185ef8d8267653e0Dan Gohman unsigned SubIdx = cast<ConstantSDNode>(N2)->getZExtValue(); 441bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman const TargetRegisterClass *TRC = MRI->getRegClass(SubReg); 4425ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman const TargetRegisterClass *SRC = 4435ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman getSuperRegisterRegClass(TRC, SubIdx, 4445ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman Node->getValueType(0)); 4455ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman 44694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Figure out the register class to create for the destreg. 4475ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman // Note that if we're going to directly use an existing register, 4485ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman // it must be precisely the required class, and not a subclass 4495ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman // thereof. 450bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman if (VRBase == 0 || SRC != MRI->getRegClass(VRBase)) { 4515ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman // Create the reg 4525ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman assert(SRC && "Couldn't find source register class"); 453bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman VRBase = MRI->createVirtualRegister(SRC); 45494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 4555ec3b427c850d8c61aaa29e3421019bdff9b77f1Dan Gohman 45694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Create the insert_subreg or subreg_to_reg machine instruction. 457bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MachineInstr *MI = BuildMI(*MF, Node->getDebugLoc(), TII->get(Opc)); 45894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateReg(VRBase, true)); 45994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 46094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // If creating a subreg_to_reg, then the first input operand 46194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // is an implicit value immediate, otherwise it's a register 462518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner if (Opc == TargetOpcode::SUBREG_TO_REG) { 46394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman const ConstantSDNode *SD = cast<ConstantSDNode>(N0); 464f5aeb1a8e4cf272c7348376d185ef8d8267653e0Dan Gohman MI->addOperand(MachineOperand::CreateImm(SD->getZExtValue())); 46594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else 46694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman AddOperand(MI, N0, 0, 0, VRBaseMap); 46794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Add the subregster being inserted 46894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman AddOperand(MI, N1, 0, 0, VRBaseMap); 46994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateImm(SubIdx)); 470bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MBB->insert(InsertPos, MI); 47194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } else 472c23197a26f34f559ea9797de51e187087c039c42Torok Edwin llvm_unreachable("Node is not insert_subreg, extract_subreg, or subreg_to_reg"); 47394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 47494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDValue Op(Node, 0); 47594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman bool isNew = VRBaseMap.insert(std::make_pair(Op, VRBase)).second; 47694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman isNew = isNew; // Silence compiler warning. 47794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman assert(isNew && "Node emitted out of order - early"); 47894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman} 47994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 48088c7af096b09ad26cbcebfdf40151e04094b7460Dan Gohman/// EmitCopyToRegClassNode - Generate machine code for COPY_TO_REGCLASS nodes. 48188c7af096b09ad26cbcebfdf40151e04094b7460Dan Gohman/// COPY_TO_REGCLASS is just a normal copy, except that the destination 482f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman/// register is constrained to be in a particular register class. 483f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman/// 484f8c7394781f7cf27ac52ca087e289436d36844daDan Gohmanvoid 485bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan GohmanInstrEmitter::EmitCopyToRegClassNode(SDNode *Node, 486bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman DenseMap<SDValue, unsigned> &VRBaseMap) { 487f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman unsigned VReg = getVR(Node->getOperand(0), VRBaseMap); 488bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman const TargetRegisterClass *SrcRC = MRI->getRegClass(VReg); 489f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 490f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman unsigned DstRCIdx = cast<ConstantSDNode>(Node->getOperand(1))->getZExtValue(); 491f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman const TargetRegisterClass *DstRC = TRI->getRegClass(DstRCIdx); 492f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 493f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman // Create the new VReg in the destination class and emit a copy. 494bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman unsigned NewVReg = MRI->createVirtualRegister(DstRC); 495bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman bool Emitted = TII->copyRegToReg(*MBB, InsertPos, NewVReg, VReg, 496f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman DstRC, SrcRC); 497f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman assert(Emitted && 49888c7af096b09ad26cbcebfdf40151e04094b7460Dan Gohman "Unable to issue a copy instruction for a COPY_TO_REGCLASS node!\n"); 4998c562e2d25d319f8bde7a1a60142203f316a2883Daniel Dunbar (void) Emitted; 500f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 501f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman SDValue Op(Node, 0); 502f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman bool isNew = VRBaseMap.insert(std::make_pair(Op, NewVReg)).second; 503f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman isNew = isNew; // Silence compiler warning. 504f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman assert(isNew && "Node emitted out of order - early"); 505f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman} 506f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 507bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng/// EmitDbgValue - Generate machine instruction for a dbg_value node. 508bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng/// 509bfcb3051899b7141a946d769fcf6e8a8453bc530Evan ChengMachineInstr *InstrEmitter::EmitDbgValue(SDDbgValue *SD, 510bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng DenseMap<SDValue, unsigned> &VRBaseMap, 511bfdf7f38523bd38ae0538861a2bfd8bdc46e5c33Dale Johannesen DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) { 512bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng uint64_t Offset = SD->getOffset(); 513bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng MDNode* MDPtr = SD->getMDPtr(); 514bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng DebugLoc DL = SD->getDebugLoc(); 515bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng 516f822e733aff93b34e6cd85b2f92d86e71fe67f87Dale Johannesen if (SD->getKind() == SDDbgValue::FRAMEIX) { 517f822e733aff93b34e6cd85b2f92d86e71fe67f87Dale Johannesen // Stack address; this needs to be lowered in target-dependent fashion. 518f822e733aff93b34e6cd85b2f92d86e71fe67f87Dale Johannesen // EmitTargetCodeForFrameDebugValue is responsible for allocation. 519f822e733aff93b34e6cd85b2f92d86e71fe67f87Dale Johannesen unsigned FrameIx = SD->getFrameIx(); 520962021bc7f6721c20c7dfe8ca809e2d98b1c554aEvan Cheng return TII->emitFrameIndexDebugValue(*MF, FrameIx, Offset, MDPtr, DL); 521f822e733aff93b34e6cd85b2f92d86e71fe67f87Dale Johannesen } 522f822e733aff93b34e6cd85b2f92d86e71fe67f87Dale Johannesen // Otherwise, we're going to create an instruction here. 52306a26637daff1bb785ef0945d1ba05f6ccdfab86Dale Johannesen const TargetInstrDesc &II = TII->get(TargetOpcode::DBG_VALUE); 524bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng MachineInstrBuilder MIB = BuildMI(*MF, DL, II); 525bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng if (SD->getKind() == SDDbgValue::SDNODE) { 526c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen SDNode *Node = SD->getSDNode(); 527c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen SDValue Op = SDValue(Node, SD->getResNo()); 528c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen // It's possible we replaced this SDNode with other(s) and therefore 529c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen // didn't generate code for it. It's better to catch these cases where 530c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen // they happen and transfer the debug info, but trying to guarantee that 531c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen // in all cases would be very fragile; this is a safeguard for any 532c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen // that were missed. 533c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen DenseMap<SDValue, unsigned>::iterator I = VRBaseMap.find(Op); 534c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen if (I==VRBaseMap.end()) 535c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen MIB.addReg(0U); // undef 536c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen else 537c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen AddOperand(&*MIB, Op, (*MIB).getNumOperands(), &II, VRBaseMap, 538c4d7b14a92a9b34449eccdccce1263c4b68ad474Dale Johannesen true /*IsDebug*/); 539bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng } else if (SD->getKind() == SDDbgValue::CONST) { 54046510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *V = SD->getConst(); 54146510a73e977273ec67747eb34cbdb43f815e451Dan Gohman if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { 542bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng MIB.addImm(CI->getSExtValue()); 54346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantFP *CF = dyn_cast<ConstantFP>(V)) { 544bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng MIB.addFPImm(CF); 545bfdf7f38523bd38ae0538861a2bfd8bdc46e5c33Dale Johannesen } else { 546bfdf7f38523bd38ae0538861a2bfd8bdc46e5c33Dale Johannesen // Could be an Undef. In any case insert an Undef so we can see what we 547bfdf7f38523bd38ae0538861a2bfd8bdc46e5c33Dale Johannesen // dropped. 548bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng MIB.addReg(0U); 549bfdf7f38523bd38ae0538861a2bfd8bdc46e5c33Dale Johannesen } 55006a26637daff1bb785ef0945d1ba05f6ccdfab86Dale Johannesen } else { 55106a26637daff1bb785ef0945d1ba05f6ccdfab86Dale Johannesen // Insert an Undef so we can see what we dropped. 552bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng MIB.addReg(0U); 55306a26637daff1bb785ef0945d1ba05f6ccdfab86Dale Johannesen } 554bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng 555bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng MIB.addImm(Offset).addMetadata(MDPtr); 556bfcb3051899b7141a946d769fcf6e8a8453bc530Evan Cheng return &*MIB; 55706a26637daff1bb785ef0945d1ba05f6ccdfab86Dale Johannesen} 55806a26637daff1bb785ef0945d1ba05f6ccdfab86Dale Johannesen 5593d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner/// EmitMachineNode - Generate machine code for a target-specific node and 5603d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner/// needed dependencies. 56194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman/// 5623d7d07ef038696cefcaf3ce5335072964199a78dChris Lattnervoid InstrEmitter:: 5633d7d07ef038696cefcaf3ce5335072964199a78dChris LattnerEmitMachineNode(SDNode *Node, bool IsClone, bool IsCloned, 5643d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner DenseMap<SDValue, unsigned> &VRBaseMap, 5653d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) { 5663d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner unsigned Opc = Node->getMachineOpcode(); 5673d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner 5683d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // Handle subreg insert/extract specially 5693d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner if (Opc == TargetOpcode::EXTRACT_SUBREG || 5703d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner Opc == TargetOpcode::INSERT_SUBREG || 5713d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner Opc == TargetOpcode::SUBREG_TO_REG) { 5723d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner EmitSubregNode(Node, VRBaseMap); 5733d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner return; 5743d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner } 57594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 5763d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // Handle COPY_TO_REGCLASS specially. 5773d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner if (Opc == TargetOpcode::COPY_TO_REGCLASS) { 5783d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner EmitCopyToRegClassNode(Node, VRBaseMap); 5793d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner return; 5803d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner } 581f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 5823d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner if (Opc == TargetOpcode::IMPLICIT_DEF) 5833d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // We want a unique VR for each IMPLICIT_DEF use. 5843d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner return; 5853d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner 5863d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner const TargetInstrDesc &II = TII->get(Opc); 5873d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner unsigned NumResults = CountResults(Node); 5883d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner unsigned NodeOperands = CountOperands(Node); 58947cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner bool HasPhysRegOuts = NumResults > II.getNumDefs() && II.getImplicitDefs()!=0; 59094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#ifndef NDEBUG 5913d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner unsigned NumMIOperands = NodeOperands + NumResults; 59247cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner if (II.isVariadic()) 59347cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner assert(NumMIOperands >= II.getNumOperands() && 59447cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner "Too few operands for a variadic node!"); 59547cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner else 59647cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner assert(NumMIOperands >= II.getNumOperands() && 59747cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner NumMIOperands <= II.getNumOperands()+II.getNumImplicitDefs() && 59847cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner "#operands for dag node doesn't match .td file!"); 59994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#endif 60094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 6013d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // Create the new machine instruction. 6023d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner MachineInstr *MI = BuildMI(*MF, Node->getDebugLoc(), II); 6033d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner 6043d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // Add result register values for things that are defined by this 6053d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // instruction. 6063d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner if (NumResults) 6073d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner CreateVirtualRegisters(Node, MI, II, IsClone, IsCloned, VRBaseMap); 6083d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner 6093d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // Emit all of the actual operands of this instruction, adding them to the 6103d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // instruction as appropriate. 6113d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner bool HasOptPRefs = II.getNumDefs() > NumResults; 6123d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner assert((!HasOptPRefs || !HasPhysRegOuts) && 6133d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner "Unable to cope with optional defs and phys regs defs!"); 6143d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner unsigned NumSkip = HasOptPRefs ? II.getNumDefs() - NumResults : 0; 6153d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner for (unsigned i = NumSkip; i != NodeOperands; ++i) 6163d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner AddOperand(MI, Node->getOperand(i), i-NumSkip+II.getNumDefs(), &II, 6173d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner VRBaseMap); 6183d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner 6193d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // Transfer all of the memory reference descriptions of this instruction. 6203d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner MI->setMemRefs(cast<MachineSDNode>(Node)->memoperands_begin(), 6213d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner cast<MachineSDNode>(Node)->memoperands_end()); 6223d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner 6233d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner if (II.usesCustomInsertionHook()) { 6243d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // Insert this instruction into the basic block using a target 6253d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // specific inserter which may returns a new basic block. 6263d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner MBB = TLI->EmitInstrWithCustomInserter(MI, MBB, EM); 6273d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner InsertPos = MBB->end(); 6287bf198fd607b356e767e0577cac81c3491c4bc90Chris Lattner return; 6293d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner } 6307bf198fd607b356e767e0577cac81c3491c4bc90Chris Lattner 6317bf198fd607b356e767e0577cac81c3491c4bc90Chris Lattner MBB->insert(InsertPos, MI); 63294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 6333d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // Additional results must be an physical register def. 6343d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner if (HasPhysRegOuts) { 6353d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner for (unsigned i = II.getNumDefs(); i < NumResults; ++i) { 6363d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner unsigned Reg = II.getImplicitDefs()[i - II.getNumDefs()]; 6373d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner if (Node->hasAnyUseOfValue(i)) 6383d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner EmitCopyFromReg(Node, i, IsClone, IsCloned, Reg, VRBaseMap); 6393d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // If there are no uses, mark the register as dead now, so that 6403d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // MachineLICM/Sink can see that it's dead. Don't do this if the 6413d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // node has a Flag value, for the benefit of targets still using 6423d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner // Flag for values in physregs. 6433d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner else if (Node->getValueType(Node->getNumValues()-1) != MVT::Flag) 6443d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner MI->addRegisterDead(Reg, TRI); 64594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 64694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 64747cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner 64847cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner // If the instruction has implicit defs and the node doesn't, mark the 64947cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner // implicit def as dead. If the node has any flag outputs, we don't do this 65047cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner // because we don't know what implicit defs are being used by flagged nodes. 651d05e8055362be52fc33dcc685ba2ae5c722506b5Evan Cheng if (Node->getValueType(Node->getNumValues()-1) != MVT::Flag) 65247cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner if (const unsigned *IDList = II.getImplicitDefs()) { 65347cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner for (unsigned i = NumResults, e = II.getNumDefs()+II.getNumImplicitDefs(); 65447cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner i != e; ++i) 65547cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner MI->addRegisterDead(IDList[i-II.getNumDefs()], TRI); 65647cdf4abff20eb9d7d05406cc1a9be2890ed39bbChris Lattner } 6573d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner} 65894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 6593d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner/// EmitSpecialNode - Generate machine code for a target-independent node and 6603d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner/// needed dependencies. 6613d7d07ef038696cefcaf3ce5335072964199a78dChris Lattnervoid InstrEmitter:: 6623d7d07ef038696cefcaf3ce5335072964199a78dChris LattnerEmitSpecialNode(SDNode *Node, bool IsClone, bool IsCloned, 6633d7d07ef038696cefcaf3ce5335072964199a78dChris Lattner DenseMap<SDValue, unsigned> &VRBaseMap) { 66494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman switch (Node->getOpcode()) { 66594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman default: 66694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#ifndef NDEBUG 667bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman Node->dump(); 66894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman#endif 669c23197a26f34f559ea9797de51e187087c039c42Torok Edwin llvm_unreachable("This target-independent node should have been selected!"); 67094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 67194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman case ISD::EntryToken: 672c23197a26f34f559ea9797de51e187087c039c42Torok Edwin llvm_unreachable("EntryToken should have been excluded from the schedule!"); 67394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 67437b7387da90ffd42d28ad0f08fca00b684294b2cEvan Cheng case ISD::MERGE_VALUES: 67594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman case ISD::TokenFactor: // fall thru 67694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 67794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman case ISD::CopyToReg: { 67894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned SrcReg; 67994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SDValue SrcVal = Node->getOperand(2); 68094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (RegisterSDNode *R = dyn_cast<RegisterSDNode>(SrcVal)) 68194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SrcReg = R->getReg(); 68294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman else 68394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SrcReg = getVR(SrcVal, VRBaseMap); 68494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 68594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned DestReg = cast<RegisterSDNode>(Node->getOperand(1))->getReg(); 68694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (SrcReg == DestReg) // Coalesced away the copy? Ignore. 68794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 68894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 68994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman const TargetRegisterClass *SrcTRC = 0, *DstTRC = 0; 69094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Get the register classes of the src/dst. 69194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (TargetRegisterInfo::isVirtualRegister(SrcReg)) 692bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman SrcTRC = MRI->getRegClass(SrcReg); 69394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman else 69494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman SrcTRC = TRI->getPhysicalRegisterRegClass(SrcReg,SrcVal.getValueType()); 69594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 69694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman if (TargetRegisterInfo::isVirtualRegister(DestReg)) 697bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman DstTRC = MRI->getRegClass(DestReg); 69894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman else 69994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman DstTRC = TRI->getPhysicalRegisterRegClass(DestReg, 70094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman Node->getOperand(1).getValueType()); 701f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman 702bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman bool Emitted = TII->copyRegToReg(*MBB, InsertPos, DestReg, SrcReg, 70347ac0f0c7c39289f5970688154e385be22b7f293Dan Gohman DstTRC, SrcTRC); 704f8c7394781f7cf27ac52ca087e289436d36844daDan Gohman assert(Emitted && "Unable to issue a copy instruction!\n"); 7058c562e2d25d319f8bde7a1a60142203f316a2883Daniel Dunbar (void) Emitted; 70694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 70794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 70894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman case ISD::CopyFromReg: { 70994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned SrcReg = cast<RegisterSDNode>(Node->getOperand(1))->getReg(); 710e57187cbe321a286f6a7f409a7badd1ae4e4642cEvan Cheng EmitCopyFromReg(Node, 0, IsClone, IsCloned, SrcReg, VRBaseMap); 71194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 71294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 7137561d480953e0a2faa4af9be0a00b1180097c4bdChris Lattner case ISD::EH_LABEL: { 7147561d480953e0a2faa4af9be0a00b1180097c4bdChris Lattner MCSymbol *S = cast<EHLabelSDNode>(Node)->getLabel(); 7157561d480953e0a2faa4af9be0a00b1180097c4bdChris Lattner BuildMI(*MBB, InsertPos, Node->getDebugLoc(), 7167561d480953e0a2faa4af9be0a00b1180097c4bdChris Lattner TII->get(TargetOpcode::EH_LABEL)).addSym(S); 7177561d480953e0a2faa4af9be0a00b1180097c4bdChris Lattner break; 7187561d480953e0a2faa4af9be0a00b1180097c4bdChris Lattner } 7197561d480953e0a2faa4af9be0a00b1180097c4bdChris Lattner 72094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman case ISD::INLINEASM: { 72194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned NumOps = Node->getNumOperands(); 722825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (Node->getOperand(NumOps-1).getValueType() == MVT::Flag) 72394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman --NumOps; // Ignore the flag operand. 72494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 72594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Create the inline asm machine instruction. 726bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MachineInstr *MI = BuildMI(*MF, Node->getDebugLoc(), 727518bb53485df640d7b7e3f6b0544099020c42aa7Chris Lattner TII->get(TargetOpcode::INLINEASM)); 72894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 72994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Add the asm string as an external symbol operand. 730decc2671516e6c52ee2f29f7746f8d02753845eaChris Lattner SDValue AsmStrV = Node->getOperand(InlineAsm::Op_AsmString); 731decc2671516e6c52ee2f29f7746f8d02753845eaChris Lattner const char *AsmStr = cast<ExternalSymbolSDNode>(AsmStrV)->getSymbol(); 73294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateES(AsmStr)); 73394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 73494b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // Add all of the operand registers to the instruction. 735decc2671516e6c52ee2f29f7746f8d02753845eaChris Lattner for (unsigned i = InlineAsm::Op_FirstOperand; i != NumOps;) { 736f5aeb1a8e4cf272c7348376d185ef8d8267653e0Dan Gohman unsigned Flags = 737f5aeb1a8e4cf272c7348376d185ef8d8267653e0Dan Gohman cast<ConstantSDNode>(Node->getOperand(i))->getZExtValue(); 738697cbbfb00c318f98d6eb51945f077e2bfe8781eEvan Cheng unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags); 73994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 74094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateImm(Flags)); 74194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman ++i; // Skip the ID value. 74294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 743decc2671516e6c52ee2f29f7746f8d02753845eaChris Lattner switch (InlineAsm::getKind(Flags)) { 744c23197a26f34f559ea9797de51e187087c039c42Torok Edwin default: llvm_unreachable("Bad flags!"); 745decc2671516e6c52ee2f29f7746f8d02753845eaChris Lattner case InlineAsm::Kind_RegDef: 74694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman for (; NumVals; --NumVals, ++i) { 74794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman unsigned Reg = cast<RegisterSDNode>(Node->getOperand(i))->getReg(); 74894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman MI->addOperand(MachineOperand::CreateReg(Reg, true)); 74994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 75094b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 751decc2671516e6c52ee2f29f7746f8d02753845eaChris Lattner case InlineAsm::Kind_RegDefEarlyClobber: 752913d3dfac43f29921467f33aa743f28ee1bfc5d1Dale Johannesen for (; NumVals; --NumVals, ++i) { 753913d3dfac43f29921467f33aa743f28ee1bfc5d1Dale Johannesen unsigned Reg = cast<RegisterSDNode>(Node->getOperand(i))->getReg(); 754913d3dfac43f29921467f33aa743f28ee1bfc5d1Dale Johannesen MI->addOperand(MachineOperand::CreateReg(Reg, true, false, false, 7554784f1fc73abf6005b7b7262d395af71b57b1255Evan Cheng false, false, true)); 756913d3dfac43f29921467f33aa743f28ee1bfc5d1Dale Johannesen } 757913d3dfac43f29921467f33aa743f28ee1bfc5d1Dale Johannesen break; 758decc2671516e6c52ee2f29f7746f8d02753845eaChris Lattner case InlineAsm::Kind_RegUse: // Use of register. 759decc2671516e6c52ee2f29f7746f8d02753845eaChris Lattner case InlineAsm::Kind_Imm: // Immediate. 760decc2671516e6c52ee2f29f7746f8d02753845eaChris Lattner case InlineAsm::Kind_Mem: // Addressing mode. 76194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // The addressing mode has been selected, just add all of the 76294b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman // operands to the machine instruction. 76394b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman for (; NumVals; --NumVals, ++i) 76486b49f8e2de796cb46c7c8b6a4c4900533fd53f4Dale Johannesen AddOperand(MI, Node->getOperand(i), 0, 0, VRBaseMap); 76594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 76694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 76794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 768cf9a415182aca6a432105a2a12168e1049de180aChris Lattner 769cf9a415182aca6a432105a2a12168e1049de180aChris Lattner // Get the mdnode from the asm if it exists and add it to the instruction. 770cf9a415182aca6a432105a2a12168e1049de180aChris Lattner SDValue MDV = Node->getOperand(InlineAsm::Op_MDNode); 771cf9a415182aca6a432105a2a12168e1049de180aChris Lattner const MDNode *MD = cast<MDNodeSDNode>(MDV)->getMD(); 772cf9a415182aca6a432105a2a12168e1049de180aChris Lattner MI->addOperand(MachineOperand::CreateMetadata(MD)); 773cf9a415182aca6a432105a2a12168e1049de180aChris Lattner 774bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MBB->insert(InsertPos, MI); 77594b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman break; 77694b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 77794b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman } 77894b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman} 77994b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman 780bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman/// InstrEmitter - Construct an InstrEmitter and set it to start inserting 781bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman/// at the given position in the given block. 782bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan GohmanInstrEmitter::InstrEmitter(MachineBasicBlock *mbb, 783bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MachineBasicBlock::iterator insertpos) 784bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman : MF(mbb->getParent()), 785bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MRI(&MF->getRegInfo()), 786bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman TM(&MF->getTarget()), 787bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman TII(TM->getInstrInfo()), 788bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman TRI(TM->getRegisterInfo()), 789bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman TLI(TM->getTargetLowering()), 790bcea859fc1dd1af9ac66ec93ea04ce9a19c8451cDan Gohman MBB(mbb), InsertPos(insertpos) { 79194b8d7ea63c5b533c299226677a0973a39f98e91Dan Gohman} 792