CodeGenInstruction.cpp revision 3f7b7f8ce0b050fc6a0100839d9c5a84198b2aed
18b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project//===- CodeGenInstruction.cpp - CodeGen Instruction Class Wrapper ---------===// 28b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// 38b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// The LLVM Compiler Infrastructure 48b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// 58b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// This file is distributed under the University of Illinois Open Source 68b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// License. See LICENSE.TXT for details. 78b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// 88b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project//===----------------------------------------------------------------------===// 98b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// 108b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// This file implements the CodeGenInstruction class. 118b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// 128b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project//===----------------------------------------------------------------------===// 138b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 148b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include "CodeGenInstruction.h" 158b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include "CodeGenTarget.h" 168b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include "llvm/TableGen/Error.h" 172910f183ddd5286911bc1e3499ea93cb57de8b75David 'Digit' Turner#include "llvm/TableGen/Record.h" 188b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include "llvm/ADT/StringExtras.h" 198b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include "llvm/ADT/StringMap.h" 208b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include "llvm/ADT/STLExtras.h" 218b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project#include <set> 228b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Projectusing namespace llvm; 238b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 248b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project//===----------------------------------------------------------------------===// 258b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project// CGIOperandList Implementation 268b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project//===----------------------------------------------------------------------===// 278b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 288b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source ProjectCGIOperandList::CGIOperandList(Record *R) : TheDef(R) { 298b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project isPredicable = false; 308b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project hasOptionalDef = false; 318b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project isVariadic = false; 328b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 338b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project DagInit *OutDI = R->getValueAsDag("OutOperandList"); 348b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 358b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (DefInit *Init = dyn_cast<DefInit>(OutDI->getOperator())) { 368b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (Init->getDef()->getName() != "outs") 378b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw R->getName() + ": invalid def name for output list: use 'outs'"; 388b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } else 398b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw R->getName() + ": invalid output list: use 'outs'"; 408b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 418b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project NumDefs = OutDI->getNumArgs(); 428b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 435389aa19033153c09556d1362a8b8a56abccb8f5Vladimir Chtchetkine DagInit *InDI = R->getValueAsDag("InOperandList"); 445389aa19033153c09556d1362a8b8a56abccb8f5Vladimir Chtchetkine if (DefInit *Init = dyn_cast<DefInit>(InDI->getOperator())) { 455389aa19033153c09556d1362a8b8a56abccb8f5Vladimir Chtchetkine if (Init->getDef()->getName() != "ins") 465389aa19033153c09556d1362a8b8a56abccb8f5Vladimir Chtchetkine throw R->getName() + ": invalid def name for input list: use 'ins'"; 475389aa19033153c09556d1362a8b8a56abccb8f5Vladimir Chtchetkine } else 485389aa19033153c09556d1362a8b8a56abccb8f5Vladimir Chtchetkine throw R->getName() + ": invalid input list: use 'ins'"; 495389aa19033153c09556d1362a8b8a56abccb8f5Vladimir Chtchetkine 508b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project unsigned MIOperandNo = 0; 515389aa19033153c09556d1362a8b8a56abccb8f5Vladimir Chtchetkine std::set<std::string> OperandNames; 525389aa19033153c09556d1362a8b8a56abccb8f5Vladimir Chtchetkine for (unsigned i = 0, e = InDI->getNumArgs()+OutDI->getNumArgs(); i != e; ++i){ 538b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project Init *ArgInit; 548b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string ArgName; 558b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (i < NumDefs) { 568b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project ArgInit = OutDI->getArg(i); 578b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project ArgName = OutDI->getArgName(i); 588b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } else { 598b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project ArgInit = InDI->getArg(i-NumDefs); 608b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project ArgName = InDI->getArgName(i-NumDefs); 618b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } 628b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 638b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project DefInit *Arg = dyn_cast<DefInit>(ArgInit); 648b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (!Arg) 658b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw "Illegal operand for the '" + R->getName() + "' instruction!"; 668b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 678b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project Record *Rec = Arg->getDef(); 688b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string PrintMethod = "printOperand"; 698b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string EncoderMethod; 708b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string OperandType = "OPERAND_UNKNOWN"; 711275f06d57fc62754e3b1abd4748e943ded966e5David Turner unsigned NumOps = 1; 728b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project DagInit *MIOpInfo = 0; 738b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (Rec->isSubClassOf("RegisterOperand")) { 748b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project PrintMethod = Rec->getValueAsString("PrintMethod"); 758b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } else if (Rec->isSubClassOf("Operand")) { 768b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project PrintMethod = Rec->getValueAsString("PrintMethod"); 778b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project OperandType = Rec->getValueAsString("OperandType"); 788b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // If there is an explicit encoder method, use it. 798b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project EncoderMethod = Rec->getValueAsString("EncoderMethod"); 808b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project MIOpInfo = Rec->getValueAsDag("MIOperandInfo"); 818b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 828b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // Verify that MIOpInfo has an 'ops' root value. 838b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (!isa<DefInit>(MIOpInfo->getOperator()) || 848b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project cast<DefInit>(MIOpInfo->getOperator())->getDef()->getName() != "ops") 858b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw "Bad value for MIOperandInfo in operand '" + Rec->getName() + 868b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project "'\n"; 878b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 888b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // If we have MIOpInfo, then we have #operands equal to number of entries 898b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // in MIOperandInfo. 908b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (unsigned NumArgs = MIOpInfo->getNumArgs()) 918b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project NumOps = NumArgs; 928b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 938b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (Rec->isSubClassOf("PredicateOperand")) 948b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project isPredicable = true; 958b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project else if (Rec->isSubClassOf("OptionalDefOperand")) 968b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project hasOptionalDef = true; 978b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } else if (Rec->getName() == "variable_ops") { 988b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project isVariadic = true; 998b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project continue; 1008b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } else if (Rec->isSubClassOf("RegisterClass")) { 1018b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project OperandType = "OPERAND_REGISTER"; 1028b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } else if (!Rec->isSubClassOf("PointerLikeRegClass") && 1038b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project !Rec->isSubClassOf("unknown_class")) 1048b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw "Unknown operand class '" + Rec->getName() + 1058b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project "' in '" + R->getName() + "' instruction!"; 1068b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1078b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // Check that the operand has a name and that it's unique. 1088b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (ArgName.empty()) 1098b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw "In instruction '" + R->getName() + "', operand #" + utostr(i) + 1108b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project " has no name!"; 1118b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (!OperandNames.insert(ArgName).second) 1128b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw "In instruction '" + R->getName() + "', operand #" + utostr(i) + 1138b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project " has the same name as a previous operand!"; 1148b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1158b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project OperandList.push_back(OperandInfo(Rec, ArgName, PrintMethod, EncoderMethod, 1168b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project OperandType, MIOperandNo, NumOps, 1178b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project MIOpInfo)); 1188b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project MIOperandNo += NumOps; 1198b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } 1208b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1218b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1228b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // Make sure the constraints list for each operand is large enough to hold 1238b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // constraint info, even if none is present. 1248b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project for (unsigned i = 0, e = OperandList.size(); i != e; ++i) 1258b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project OperandList[i].Constraints.resize(OperandList[i].MINumOperands); 1268b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project} 1278b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1288b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1298b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/// getOperandNamed - Return the index of the operand with the specified 1308b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/// non-empty name. If the instruction does not have an operand with the 1318b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/// specified name, throw an exception. 1328b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/// 1338b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Projectunsigned CGIOperandList::getOperandNamed(StringRef Name) const { 1348b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project unsigned OpIdx; 1358b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (hasOperandNamed(Name, OpIdx)) return OpIdx; 1368b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw "'" + TheDef->getName() + "' does not have an operand named '$" + 1378b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project Name.str() + "'!"; 1388b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project} 1398b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1408b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/// hasOperandNamed - Query whether the instruction has an operand of the 1418b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/// given name. If so, return true and set OpIdx to the index of the 1428b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project/// operand. Otherwise, return false. 1438b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Projectbool CGIOperandList::hasOperandNamed(StringRef Name, unsigned &OpIdx) const { 1448b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project assert(!Name.empty() && "Cannot search for operand with no name!"); 1458b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project for (unsigned i = 0, e = OperandList.size(); i != e; ++i) 1468b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (OperandList[i].Name == Name) { 1478b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project OpIdx = i; 1488b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project return true; 1498b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } 1508b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project return false; 1518b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project} 1528b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1538b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Projectstd::pair<unsigned,unsigned> 1548b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source ProjectCGIOperandList::ParseOperandName(const std::string &Op, bool AllowWholeOp) { 1558b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (Op.empty() || Op[0] != '$') 1568b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw TheDef->getName() + ": Illegal operand name: '" + Op + "'"; 1578b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1588b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string OpName = Op.substr(1); 1598b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string SubOpName; 1608b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1618b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // Check to see if this is $foo.bar. 1628b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string::size_type DotIdx = OpName.find_first_of("."); 1638b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (DotIdx != std::string::npos) { 1648b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project SubOpName = OpName.substr(DotIdx+1); 1658b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (SubOpName.empty()) 1668b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw TheDef->getName() + ": illegal empty suboperand name in '" +Op +"'"; 1678b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project OpName = OpName.substr(0, DotIdx); 1688b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } 1698b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1708b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project unsigned OpIdx = getOperandNamed(OpName); 1718b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1728b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (SubOpName.empty()) { // If no suboperand name was specified: 1738b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // If one was needed, throw. 1748b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (OperandList[OpIdx].MINumOperands > 1 && !AllowWholeOp && 1758b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project SubOpName.empty()) 1768b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw TheDef->getName() + ": Illegal to refer to" 1778b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project " whole operand part of complex operand '" + Op + "'"; 1788b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1798b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // Otherwise, return the operand. 1808b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project return std::make_pair(OpIdx, 0U); 1818b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project } 1828b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1838b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // Find the suboperand number involved. 1848b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project DagInit *MIOpInfo = OperandList[OpIdx].MIOperandInfo; 1858b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (MIOpInfo == 0) 1868b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw TheDef->getName() + ": unknown suboperand name in '" + Op + "'"; 1878b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1888b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // Find the operand with the right name. 1898b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project for (unsigned i = 0, e = MIOpInfo->getNumArgs(); i != e; ++i) 1908b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (MIOpInfo->getArgName(i) == SubOpName) 1918b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project return std::make_pair(OpIdx, i); 1928b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1938b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // Otherwise, didn't find it! 1948b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw TheDef->getName() + ": unknown suboperand name in '" + Op + "'"; 1958b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project} 1968b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project 1978b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Projectstatic void ParseConstraint(const std::string &CStr, CGIOperandList &Ops) { 1988b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project // EARLY_CLOBBER: @early $reg 1998b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string::size_type wpos = CStr.find_first_of(" \t"); 2008b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string::size_type start = CStr.find_first_not_of(" \t"); 2018b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string Tok = CStr.substr(start, wpos - start); 2028b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (Tok == "@earlyclobber") { 2038b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project std::string Name = CStr.substr(wpos+1); 2048b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project wpos = Name.find_first_not_of(" \t"); 2058b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project if (wpos == std::string::npos) 2068b23a6c7e1aee255004dd19098d4c2462b61b849The Android Open Source Project throw "Illegal format for @earlyclobber constraint: '" + CStr + "'"; 207 Name = Name.substr(wpos); 208 std::pair<unsigned,unsigned> Op = Ops.ParseOperandName(Name, false); 209 210 // Build the string for the operand 211 if (!Ops[Op.first].Constraints[Op.second].isNone()) 212 throw "Operand '" + Name + "' cannot have multiple constraints!"; 213 Ops[Op.first].Constraints[Op.second] = 214 CGIOperandList::ConstraintInfo::getEarlyClobber(); 215 return; 216 } 217 218 // Only other constraint is "TIED_TO" for now. 219 std::string::size_type pos = CStr.find_first_of('='); 220 assert(pos != std::string::npos && "Unrecognized constraint"); 221 start = CStr.find_first_not_of(" \t"); 222 std::string Name = CStr.substr(start, pos - start); 223 224 // TIED_TO: $src1 = $dst 225 wpos = Name.find_first_of(" \t"); 226 if (wpos == std::string::npos) 227 throw "Illegal format for tied-to constraint: '" + CStr + "'"; 228 std::string DestOpName = Name.substr(0, wpos); 229 std::pair<unsigned,unsigned> DestOp = Ops.ParseOperandName(DestOpName, false); 230 231 Name = CStr.substr(pos+1); 232 wpos = Name.find_first_not_of(" \t"); 233 if (wpos == std::string::npos) 234 throw "Illegal format for tied-to constraint: '" + CStr + "'"; 235 236 std::pair<unsigned,unsigned> SrcOp = 237 Ops.ParseOperandName(Name.substr(wpos), false); 238 if (SrcOp > DestOp) 239 throw "Illegal tied-to operand constraint '" + CStr + "'"; 240 241 242 unsigned FlatOpNo = Ops.getFlattenedOperandNumber(SrcOp); 243 244 if (!Ops[DestOp.first].Constraints[DestOp.second].isNone()) 245 throw "Operand '" + DestOpName + "' cannot have multiple constraints!"; 246 Ops[DestOp.first].Constraints[DestOp.second] = 247 CGIOperandList::ConstraintInfo::getTied(FlatOpNo); 248} 249 250static void ParseConstraints(const std::string &CStr, CGIOperandList &Ops) { 251 if (CStr.empty()) return; 252 253 const std::string delims(","); 254 std::string::size_type bidx, eidx; 255 256 bidx = CStr.find_first_not_of(delims); 257 while (bidx != std::string::npos) { 258 eidx = CStr.find_first_of(delims, bidx); 259 if (eidx == std::string::npos) 260 eidx = CStr.length(); 261 262 ParseConstraint(CStr.substr(bidx, eidx - bidx), Ops); 263 bidx = CStr.find_first_not_of(delims, eidx); 264 } 265} 266 267void CGIOperandList::ProcessDisableEncoding(std::string DisableEncoding) { 268 while (1) { 269 std::pair<StringRef, StringRef> P = getToken(DisableEncoding, " ,\t"); 270 std::string OpName = P.first; 271 DisableEncoding = P.second; 272 if (OpName.empty()) break; 273 274 // Figure out which operand this is. 275 std::pair<unsigned,unsigned> Op = ParseOperandName(OpName, false); 276 277 // Mark the operand as not-to-be encoded. 278 if (Op.second >= OperandList[Op.first].DoNotEncode.size()) 279 OperandList[Op.first].DoNotEncode.resize(Op.second+1); 280 OperandList[Op.first].DoNotEncode[Op.second] = true; 281 } 282 283} 284 285//===----------------------------------------------------------------------===// 286// CodeGenInstruction Implementation 287//===----------------------------------------------------------------------===// 288 289CodeGenInstruction::CodeGenInstruction(Record *R) 290 : TheDef(R), Operands(R), InferredFrom(0) { 291 Namespace = R->getValueAsString("Namespace"); 292 AsmString = R->getValueAsString("AsmString"); 293 294 isReturn = R->getValueAsBit("isReturn"); 295 isBranch = R->getValueAsBit("isBranch"); 296 isIndirectBranch = R->getValueAsBit("isIndirectBranch"); 297 isCompare = R->getValueAsBit("isCompare"); 298 isMoveImm = R->getValueAsBit("isMoveImm"); 299 isBitcast = R->getValueAsBit("isBitcast"); 300 isSelect = R->getValueAsBit("isSelect"); 301 isBarrier = R->getValueAsBit("isBarrier"); 302 isCall = R->getValueAsBit("isCall"); 303 canFoldAsLoad = R->getValueAsBit("canFoldAsLoad"); 304 isPredicable = Operands.isPredicable || R->getValueAsBit("isPredicable"); 305 isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress"); 306 isCommutable = R->getValueAsBit("isCommutable"); 307 isTerminator = R->getValueAsBit("isTerminator"); 308 isReMaterializable = R->getValueAsBit("isReMaterializable"); 309 hasDelaySlot = R->getValueAsBit("hasDelaySlot"); 310 usesCustomInserter = R->getValueAsBit("usesCustomInserter"); 311 hasPostISelHook = R->getValueAsBit("hasPostISelHook"); 312 hasCtrlDep = R->getValueAsBit("hasCtrlDep"); 313 isNotDuplicable = R->getValueAsBit("isNotDuplicable"); 314 315 mayLoad = R->getValueAsBitOrUnset("mayLoad", mayLoad_Unset); 316 mayStore = R->getValueAsBitOrUnset("mayStore", mayStore_Unset); 317 hasSideEffects = R->getValueAsBitOrUnset("hasSideEffects", 318 hasSideEffects_Unset); 319 neverHasSideEffects = R->getValueAsBit("neverHasSideEffects"); 320 321 isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove"); 322 hasExtraSrcRegAllocReq = R->getValueAsBit("hasExtraSrcRegAllocReq"); 323 hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq"); 324 isCodeGenOnly = R->getValueAsBit("isCodeGenOnly"); 325 isPseudo = R->getValueAsBit("isPseudo"); 326 ImplicitDefs = R->getValueAsListOfDefs("Defs"); 327 ImplicitUses = R->getValueAsListOfDefs("Uses"); 328 329 if (neverHasSideEffects + hasSideEffects > 1) 330 throw R->getName() + ": multiple conflicting side-effect flags set!"; 331 332 // Parse Constraints. 333 ParseConstraints(R->getValueAsString("Constraints"), Operands); 334 335 // Parse the DisableEncoding field. 336 Operands.ProcessDisableEncoding(R->getValueAsString("DisableEncoding")); 337} 338 339/// HasOneImplicitDefWithKnownVT - If the instruction has at least one 340/// implicit def and it has a known VT, return the VT, otherwise return 341/// MVT::Other. 342MVT::SimpleValueType CodeGenInstruction:: 343HasOneImplicitDefWithKnownVT(const CodeGenTarget &TargetInfo) const { 344 if (ImplicitDefs.empty()) return MVT::Other; 345 346 // Check to see if the first implicit def has a resolvable type. 347 Record *FirstImplicitDef = ImplicitDefs[0]; 348 assert(FirstImplicitDef->isSubClassOf("Register")); 349 const std::vector<MVT::SimpleValueType> &RegVTs = 350 TargetInfo.getRegisterVTs(FirstImplicitDef); 351 if (RegVTs.size() == 1) 352 return RegVTs[0]; 353 return MVT::Other; 354} 355 356 357/// FlattenAsmStringVariants - Flatten the specified AsmString to only 358/// include text from the specified variant, returning the new string. 359std::string CodeGenInstruction:: 360FlattenAsmStringVariants(StringRef Cur, unsigned Variant) { 361 std::string Res = ""; 362 363 for (;;) { 364 // Find the start of the next variant string. 365 size_t VariantsStart = 0; 366 for (size_t e = Cur.size(); VariantsStart != e; ++VariantsStart) 367 if (Cur[VariantsStart] == '{' && 368 (VariantsStart == 0 || (Cur[VariantsStart-1] != '$' && 369 Cur[VariantsStart-1] != '\\'))) 370 break; 371 372 // Add the prefix to the result. 373 Res += Cur.slice(0, VariantsStart); 374 if (VariantsStart == Cur.size()) 375 break; 376 377 ++VariantsStart; // Skip the '{'. 378 379 // Scan to the end of the variants string. 380 size_t VariantsEnd = VariantsStart; 381 unsigned NestedBraces = 1; 382 for (size_t e = Cur.size(); VariantsEnd != e; ++VariantsEnd) { 383 if (Cur[VariantsEnd] == '}' && Cur[VariantsEnd-1] != '\\') { 384 if (--NestedBraces == 0) 385 break; 386 } else if (Cur[VariantsEnd] == '{') 387 ++NestedBraces; 388 } 389 390 // Select the Nth variant (or empty). 391 StringRef Selection = Cur.slice(VariantsStart, VariantsEnd); 392 for (unsigned i = 0; i != Variant; ++i) 393 Selection = Selection.split('|').second; 394 Res += Selection.split('|').first; 395 396 assert(VariantsEnd != Cur.size() && 397 "Unterminated variants in assembly string!"); 398 Cur = Cur.substr(VariantsEnd + 1); 399 } 400 401 return Res; 402} 403 404 405//===----------------------------------------------------------------------===// 406/// CodeGenInstAlias Implementation 407//===----------------------------------------------------------------------===// 408 409/// tryAliasOpMatch - This is a helper function for the CodeGenInstAlias 410/// constructor. It checks if an argument in an InstAlias pattern matches 411/// the corresponding operand of the instruction. It returns true on a 412/// successful match, with ResOp set to the result operand to be used. 413bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo, 414 Record *InstOpRec, bool hasSubOps, 415 ArrayRef<SMLoc> Loc, CodeGenTarget &T, 416 ResultOperand &ResOp) { 417 Init *Arg = Result->getArg(AliasOpNo); 418 DefInit *ADI = dyn_cast<DefInit>(Arg); 419 420 if (ADI && ADI->getDef() == InstOpRec) { 421 // If the operand is a record, it must have a name, and the record type 422 // must match up with the instruction's argument type. 423 if (Result->getArgName(AliasOpNo).empty()) 424 throw TGError(Loc, "result argument #" + utostr(AliasOpNo) + 425 " must have a name!"); 426 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 427 return true; 428 } 429 430 // For register operands, the source register class can be a subclass 431 // of the instruction register class, not just an exact match. 432 if (ADI && ADI->getDef()->isSubClassOf("RegisterClass")) { 433 if (!InstOpRec->isSubClassOf("RegisterClass")) 434 return false; 435 if (!T.getRegisterClass(InstOpRec) 436 .hasSubClass(&T.getRegisterClass(ADI->getDef()))) 437 return false; 438 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 439 return true; 440 } 441 442 // Handle explicit registers. 443 if (ADI && ADI->getDef()->isSubClassOf("Register")) { 444 if (InstOpRec->isSubClassOf("OptionalDefOperand")) { 445 DagInit *DI = InstOpRec->getValueAsDag("MIOperandInfo"); 446 // The operand info should only have a single (register) entry. We 447 // want the register class of it. 448 InstOpRec = cast<DefInit>(DI->getArg(0))->getDef(); 449 } 450 451 if (InstOpRec->isSubClassOf("RegisterOperand")) 452 InstOpRec = InstOpRec->getValueAsDef("RegClass"); 453 454 if (!InstOpRec->isSubClassOf("RegisterClass")) 455 return false; 456 457 if (!T.getRegisterClass(InstOpRec) 458 .contains(T.getRegBank().getReg(ADI->getDef()))) 459 throw TGError(Loc, "fixed register " + ADI->getDef()->getName() + 460 " is not a member of the " + InstOpRec->getName() + 461 " register class!"); 462 463 if (!Result->getArgName(AliasOpNo).empty()) 464 throw TGError(Loc, "result fixed register argument must " 465 "not have a name!"); 466 467 ResOp = ResultOperand(ADI->getDef()); 468 return true; 469 } 470 471 // Handle "zero_reg" for optional def operands. 472 if (ADI && ADI->getDef()->getName() == "zero_reg") { 473 474 // Check if this is an optional def. 475 // Tied operands where the source is a sub-operand of a complex operand 476 // need to represent both operands in the alias destination instruction. 477 // Allow zero_reg for the tied portion. This can and should go away once 478 // the MC representation of things doesn't use tied operands at all. 479 //if (!InstOpRec->isSubClassOf("OptionalDefOperand")) 480 // throw TGError(Loc, "reg0 used for result that is not an " 481 // "OptionalDefOperand!"); 482 483 ResOp = ResultOperand(static_cast<Record*>(0)); 484 return true; 485 } 486 487 // Literal integers. 488 if (IntInit *II = dyn_cast<IntInit>(Arg)) { 489 if (hasSubOps || !InstOpRec->isSubClassOf("Operand")) 490 return false; 491 // Integer arguments can't have names. 492 if (!Result->getArgName(AliasOpNo).empty()) 493 throw TGError(Loc, "result argument #" + utostr(AliasOpNo) + 494 " must not have a name!"); 495 ResOp = ResultOperand(II->getValue()); 496 return true; 497 } 498 499 // If both are Operands with the same MVT, allow the conversion. It's 500 // up to the user to make sure the values are appropriate, just like 501 // for isel Pat's. 502 if (InstOpRec->isSubClassOf("Operand") && 503 ADI->getDef()->isSubClassOf("Operand")) { 504 // FIXME: What other attributes should we check here? Identical 505 // MIOperandInfo perhaps? 506 if (InstOpRec->getValueInit("Type") != ADI->getDef()->getValueInit("Type")) 507 return false; 508 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 509 return true; 510 } 511 512 return false; 513} 514 515CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T) : TheDef(R) { 516 AsmString = R->getValueAsString("AsmString"); 517 Result = R->getValueAsDag("ResultInst"); 518 519 // Verify that the root of the result is an instruction. 520 DefInit *DI = dyn_cast<DefInit>(Result->getOperator()); 521 if (DI == 0 || !DI->getDef()->isSubClassOf("Instruction")) 522 throw TGError(R->getLoc(), "result of inst alias should be an instruction"); 523 524 ResultInst = &T.getInstruction(DI->getDef()); 525 526 // NameClass - If argument names are repeated, we need to verify they have 527 // the same class. 528 StringMap<Record*> NameClass; 529 for (unsigned i = 0, e = Result->getNumArgs(); i != e; ++i) { 530 DefInit *ADI = dyn_cast<DefInit>(Result->getArg(i)); 531 if (!ADI || Result->getArgName(i).empty()) 532 continue; 533 // Verify we don't have something like: (someinst GR16:$foo, GR32:$foo) 534 // $foo can exist multiple times in the result list, but it must have the 535 // same type. 536 Record *&Entry = NameClass[Result->getArgName(i)]; 537 if (Entry && Entry != ADI->getDef()) 538 throw TGError(R->getLoc(), "result value $" + Result->getArgName(i) + 539 " is both " + Entry->getName() + " and " + 540 ADI->getDef()->getName() + "!"); 541 Entry = ADI->getDef(); 542 } 543 544 // Decode and validate the arguments of the result. 545 unsigned AliasOpNo = 0; 546 for (unsigned i = 0, e = ResultInst->Operands.size(); i != e; ++i) { 547 548 // Tied registers don't have an entry in the result dag unless they're part 549 // of a complex operand, in which case we include them anyways, as we 550 // don't have any other way to specify the whole operand. 551 if (ResultInst->Operands[i].MINumOperands == 1 && 552 ResultInst->Operands[i].getTiedRegister() != -1) 553 continue; 554 555 if (AliasOpNo >= Result->getNumArgs()) 556 throw TGError(R->getLoc(), "not enough arguments for instruction!"); 557 558 Record *InstOpRec = ResultInst->Operands[i].Rec; 559 unsigned NumSubOps = ResultInst->Operands[i].MINumOperands; 560 ResultOperand ResOp(static_cast<int64_t>(0)); 561 if (tryAliasOpMatch(Result, AliasOpNo, InstOpRec, (NumSubOps > 1), 562 R->getLoc(), T, ResOp)) { 563 // If this is a simple operand, or a complex operand with a custom match 564 // class, then we can match is verbatim. 565 if (NumSubOps == 1 || 566 (InstOpRec->getValue("ParserMatchClass") && 567 InstOpRec->getValueAsDef("ParserMatchClass") 568 ->getValueAsString("Name") != "Imm")) { 569 ResultOperands.push_back(ResOp); 570 ResultInstOperandIndex.push_back(std::make_pair(i, -1)); 571 ++AliasOpNo; 572 573 // Otherwise, we need to match each of the suboperands individually. 574 } else { 575 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo; 576 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) { 577 Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef(); 578 579 // Take care to instantiate each of the suboperands with the correct 580 // nomenclature: $foo.bar 581 ResultOperands.push_back( 582 ResultOperand(Result->getArgName(AliasOpNo) + "." + 583 MIOI->getArgName(SubOp), SubRec)); 584 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp)); 585 } 586 ++AliasOpNo; 587 } 588 continue; 589 } 590 591 // If the argument did not match the instruction operand, and the operand 592 // is composed of multiple suboperands, try matching the suboperands. 593 if (NumSubOps > 1) { 594 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo; 595 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) { 596 if (AliasOpNo >= Result->getNumArgs()) 597 throw TGError(R->getLoc(), "not enough arguments for instruction!"); 598 Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef(); 599 if (tryAliasOpMatch(Result, AliasOpNo, SubRec, false, 600 R->getLoc(), T, ResOp)) { 601 ResultOperands.push_back(ResOp); 602 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp)); 603 ++AliasOpNo; 604 } else { 605 throw TGError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + 606 " does not match instruction operand class " + 607 (SubOp == 0 ? InstOpRec->getName() :SubRec->getName())); 608 } 609 } 610 continue; 611 } 612 throw TGError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + 613 " does not match instruction operand class " + 614 InstOpRec->getName()); 615 } 616 617 if (AliasOpNo != Result->getNumArgs()) 618 throw TGError(R->getLoc(), "too many operands for instruction!"); 619} 620