689 lines
26 KiB
C++
689 lines
26 KiB
C++
//===- CodeGenInstruction.cpp - CodeGen Instruction Class Wrapper ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the CodeGenInstruction class.
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//
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//===----------------------------------------------------------------------===//
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#include "CodeGenInstruction.h"
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#include "CodeGenTarget.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/TableGen/Error.h"
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#include "llvm/TableGen/Record.h"
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#include <set>
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// CGIOperandList Implementation
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//===----------------------------------------------------------------------===//
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CGIOperandList::CGIOperandList(Record *R) : TheDef(R) {
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isPredicable = false;
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hasOptionalDef = false;
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isVariadic = false;
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DagInit *OutDI = R->getValueAsDag("OutOperandList");
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if (DefInit *Init = dyn_cast<DefInit>(OutDI->getOperator())) {
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if (Init->getDef()->getName() != "outs")
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PrintFatalError(R->getName() + ": invalid def name for output list: use 'outs'");
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} else
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PrintFatalError(R->getName() + ": invalid output list: use 'outs'");
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NumDefs = OutDI->getNumArgs();
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DagInit *InDI = R->getValueAsDag("InOperandList");
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if (DefInit *Init = dyn_cast<DefInit>(InDI->getOperator())) {
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if (Init->getDef()->getName() != "ins")
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PrintFatalError(R->getName() + ": invalid def name for input list: use 'ins'");
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} else
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PrintFatalError(R->getName() + ": invalid input list: use 'ins'");
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unsigned MIOperandNo = 0;
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std::set<std::string> OperandNames;
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unsigned e = InDI->getNumArgs() + OutDI->getNumArgs();
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OperandList.reserve(e);
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for (unsigned i = 0; i != e; ++i){
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Init *ArgInit;
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StringRef ArgName;
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if (i < NumDefs) {
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ArgInit = OutDI->getArg(i);
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ArgName = OutDI->getArgNameStr(i);
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} else {
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ArgInit = InDI->getArg(i-NumDefs);
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ArgName = InDI->getArgNameStr(i-NumDefs);
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}
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DefInit *Arg = dyn_cast<DefInit>(ArgInit);
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if (!Arg)
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PrintFatalError("Illegal operand for the '" + R->getName() + "' instruction!");
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Record *Rec = Arg->getDef();
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std::string PrintMethod = "printOperand";
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std::string EncoderMethod;
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std::string OperandType = "OPERAND_UNKNOWN";
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std::string OperandNamespace = "MCOI";
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unsigned NumOps = 1;
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DagInit *MIOpInfo = nullptr;
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if (Rec->isSubClassOf("RegisterOperand")) {
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PrintMethod = Rec->getValueAsString("PrintMethod");
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OperandType = Rec->getValueAsString("OperandType");
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OperandNamespace = Rec->getValueAsString("OperandNamespace");
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} else if (Rec->isSubClassOf("Operand")) {
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PrintMethod = Rec->getValueAsString("PrintMethod");
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OperandType = Rec->getValueAsString("OperandType");
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OperandNamespace = Rec->getValueAsString("OperandNamespace");
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// If there is an explicit encoder method, use it.
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EncoderMethod = Rec->getValueAsString("EncoderMethod");
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MIOpInfo = Rec->getValueAsDag("MIOperandInfo");
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// Verify that MIOpInfo has an 'ops' root value.
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if (!isa<DefInit>(MIOpInfo->getOperator()) ||
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cast<DefInit>(MIOpInfo->getOperator())->getDef()->getName() != "ops")
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PrintFatalError("Bad value for MIOperandInfo in operand '" + Rec->getName() +
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"'\n");
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// If we have MIOpInfo, then we have #operands equal to number of entries
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// in MIOperandInfo.
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if (unsigned NumArgs = MIOpInfo->getNumArgs())
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NumOps = NumArgs;
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if (Rec->isSubClassOf("PredicateOp"))
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isPredicable = true;
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else if (Rec->isSubClassOf("OptionalDefOperand"))
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hasOptionalDef = true;
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} else if (Rec->getName() == "variable_ops") {
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isVariadic = true;
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continue;
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} else if (Rec->isSubClassOf("RegisterClass")) {
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OperandType = "OPERAND_REGISTER";
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} else if (!Rec->isSubClassOf("PointerLikeRegClass") &&
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!Rec->isSubClassOf("unknown_class"))
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PrintFatalError("Unknown operand class '" + Rec->getName() +
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"' in '" + R->getName() + "' instruction!");
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// Check that the operand has a name and that it's unique.
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if (ArgName.empty())
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PrintFatalError("In instruction '" + R->getName() + "', operand #" +
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Twine(i) + " has no name!");
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if (!OperandNames.insert(ArgName).second)
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PrintFatalError("In instruction '" + R->getName() + "', operand #" +
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Twine(i) + " has the same name as a previous operand!");
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OperandList.emplace_back(Rec, ArgName, PrintMethod, EncoderMethod,
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OperandNamespace + "::" + OperandType, MIOperandNo,
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NumOps, MIOpInfo);
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MIOperandNo += NumOps;
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}
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// Make sure the constraints list for each operand is large enough to hold
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// constraint info, even if none is present.
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for (unsigned i = 0, e = OperandList.size(); i != e; ++i)
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OperandList[i].Constraints.resize(OperandList[i].MINumOperands);
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}
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/// getOperandNamed - Return the index of the operand with the specified
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/// non-empty name. If the instruction does not have an operand with the
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/// specified name, abort.
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///
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unsigned CGIOperandList::getOperandNamed(StringRef Name) const {
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unsigned OpIdx;
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if (hasOperandNamed(Name, OpIdx)) return OpIdx;
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PrintFatalError("'" + TheDef->getName() +
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"' does not have an operand named '$" + Name + "'!");
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}
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/// hasOperandNamed - Query whether the instruction has an operand of the
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/// given name. If so, return true and set OpIdx to the index of the
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/// operand. Otherwise, return false.
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bool CGIOperandList::hasOperandNamed(StringRef Name, unsigned &OpIdx) const {
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assert(!Name.empty() && "Cannot search for operand with no name!");
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for (unsigned i = 0, e = OperandList.size(); i != e; ++i)
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if (OperandList[i].Name == Name) {
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OpIdx = i;
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return true;
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}
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return false;
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}
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std::pair<unsigned,unsigned>
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CGIOperandList::ParseOperandName(const std::string &Op, bool AllowWholeOp) {
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if (Op.empty() || Op[0] != '$')
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PrintFatalError(TheDef->getName() + ": Illegal operand name: '" + Op + "'");
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std::string OpName = Op.substr(1);
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std::string SubOpName;
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// Check to see if this is $foo.bar.
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std::string::size_type DotIdx = OpName.find_first_of('.');
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if (DotIdx != std::string::npos) {
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SubOpName = OpName.substr(DotIdx+1);
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if (SubOpName.empty())
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PrintFatalError(TheDef->getName() + ": illegal empty suboperand name in '" +Op +"'");
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OpName = OpName.substr(0, DotIdx);
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}
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unsigned OpIdx = getOperandNamed(OpName);
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if (SubOpName.empty()) { // If no suboperand name was specified:
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// If one was needed, throw.
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if (OperandList[OpIdx].MINumOperands > 1 && !AllowWholeOp &&
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SubOpName.empty())
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PrintFatalError(TheDef->getName() + ": Illegal to refer to"
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" whole operand part of complex operand '" + Op + "'");
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// Otherwise, return the operand.
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return std::make_pair(OpIdx, 0U);
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}
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// Find the suboperand number involved.
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DagInit *MIOpInfo = OperandList[OpIdx].MIOperandInfo;
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if (!MIOpInfo)
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PrintFatalError(TheDef->getName() + ": unknown suboperand name in '" + Op + "'");
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// Find the operand with the right name.
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for (unsigned i = 0, e = MIOpInfo->getNumArgs(); i != e; ++i)
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if (MIOpInfo->getArgNameStr(i) == SubOpName)
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return std::make_pair(OpIdx, i);
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// Otherwise, didn't find it!
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PrintFatalError(TheDef->getName() + ": unknown suboperand name in '" + Op + "'");
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return std::make_pair(0U, 0U);
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}
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static void ParseConstraint(const std::string &CStr, CGIOperandList &Ops) {
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// EARLY_CLOBBER: @early $reg
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std::string::size_type wpos = CStr.find_first_of(" \t");
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std::string::size_type start = CStr.find_first_not_of(" \t");
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std::string Tok = CStr.substr(start, wpos - start);
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if (Tok == "@earlyclobber") {
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std::string Name = CStr.substr(wpos+1);
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wpos = Name.find_first_not_of(" \t");
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if (wpos == std::string::npos)
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PrintFatalError("Illegal format for @earlyclobber constraint: '" + CStr + "'");
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Name = Name.substr(wpos);
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std::pair<unsigned,unsigned> Op = Ops.ParseOperandName(Name, false);
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// Build the string for the operand
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if (!Ops[Op.first].Constraints[Op.second].isNone())
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PrintFatalError("Operand '" + Name + "' cannot have multiple constraints!");
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Ops[Op.first].Constraints[Op.second] =
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CGIOperandList::ConstraintInfo::getEarlyClobber();
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return;
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}
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// Only other constraint is "TIED_TO" for now.
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std::string::size_type pos = CStr.find_first_of('=');
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assert(pos != std::string::npos && "Unrecognized constraint");
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start = CStr.find_first_not_of(" \t");
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std::string Name = CStr.substr(start, pos - start);
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// TIED_TO: $src1 = $dst
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wpos = Name.find_first_of(" \t");
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if (wpos == std::string::npos)
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PrintFatalError("Illegal format for tied-to constraint: '" + CStr + "'");
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std::string DestOpName = Name.substr(0, wpos);
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std::pair<unsigned,unsigned> DestOp = Ops.ParseOperandName(DestOpName, false);
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Name = CStr.substr(pos+1);
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wpos = Name.find_first_not_of(" \t");
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if (wpos == std::string::npos)
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PrintFatalError("Illegal format for tied-to constraint: '" + CStr + "'");
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std::string SrcOpName = Name.substr(wpos);
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std::pair<unsigned,unsigned> SrcOp = Ops.ParseOperandName(SrcOpName, false);
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if (SrcOp > DestOp) {
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std::swap(SrcOp, DestOp);
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std::swap(SrcOpName, DestOpName);
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}
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unsigned FlatOpNo = Ops.getFlattenedOperandNumber(SrcOp);
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if (!Ops[DestOp.first].Constraints[DestOp.second].isNone())
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PrintFatalError("Operand '" + DestOpName +
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"' cannot have multiple constraints!");
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Ops[DestOp.first].Constraints[DestOp.second] =
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CGIOperandList::ConstraintInfo::getTied(FlatOpNo);
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}
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static void ParseConstraints(const std::string &CStr, CGIOperandList &Ops) {
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if (CStr.empty()) return;
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const std::string delims(",");
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std::string::size_type bidx, eidx;
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bidx = CStr.find_first_not_of(delims);
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while (bidx != std::string::npos) {
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eidx = CStr.find_first_of(delims, bidx);
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if (eidx == std::string::npos)
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eidx = CStr.length();
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ParseConstraint(CStr.substr(bidx, eidx - bidx), Ops);
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bidx = CStr.find_first_not_of(delims, eidx);
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}
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}
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void CGIOperandList::ProcessDisableEncoding(std::string DisableEncoding) {
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while (1) {
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std::pair<StringRef, StringRef> P = getToken(DisableEncoding, " ,\t");
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std::string OpName = P.first;
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DisableEncoding = P.second;
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if (OpName.empty()) break;
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// Figure out which operand this is.
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std::pair<unsigned,unsigned> Op = ParseOperandName(OpName, false);
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// Mark the operand as not-to-be encoded.
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if (Op.second >= OperandList[Op.first].DoNotEncode.size())
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OperandList[Op.first].DoNotEncode.resize(Op.second+1);
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OperandList[Op.first].DoNotEncode[Op.second] = true;
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}
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}
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//===----------------------------------------------------------------------===//
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// CodeGenInstruction Implementation
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//===----------------------------------------------------------------------===//
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CodeGenInstruction::CodeGenInstruction(Record *R)
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: TheDef(R), Operands(R), InferredFrom(nullptr) {
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Namespace = R->getValueAsString("Namespace");
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AsmString = R->getValueAsString("AsmString");
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isReturn = R->getValueAsBit("isReturn");
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isBranch = R->getValueAsBit("isBranch");
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isIndirectBranch = R->getValueAsBit("isIndirectBranch");
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isCompare = R->getValueAsBit("isCompare");
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isMoveImm = R->getValueAsBit("isMoveImm");
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isBitcast = R->getValueAsBit("isBitcast");
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isSelect = R->getValueAsBit("isSelect");
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isBarrier = R->getValueAsBit("isBarrier");
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isCall = R->getValueAsBit("isCall");
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isAdd = R->getValueAsBit("isAdd");
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canFoldAsLoad = R->getValueAsBit("canFoldAsLoad");
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isPredicable = Operands.isPredicable || R->getValueAsBit("isPredicable");
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isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress");
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isCommutable = R->getValueAsBit("isCommutable");
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isTerminator = R->getValueAsBit("isTerminator");
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isReMaterializable = R->getValueAsBit("isReMaterializable");
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hasDelaySlot = R->getValueAsBit("hasDelaySlot");
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usesCustomInserter = R->getValueAsBit("usesCustomInserter");
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hasPostISelHook = R->getValueAsBit("hasPostISelHook");
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hasCtrlDep = R->getValueAsBit("hasCtrlDep");
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isNotDuplicable = R->getValueAsBit("isNotDuplicable");
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isRegSequence = R->getValueAsBit("isRegSequence");
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isExtractSubreg = R->getValueAsBit("isExtractSubreg");
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isInsertSubreg = R->getValueAsBit("isInsertSubreg");
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isConvergent = R->getValueAsBit("isConvergent");
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hasNoSchedulingInfo = R->getValueAsBit("hasNoSchedulingInfo");
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bool Unset;
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mayLoad = R->getValueAsBitOrUnset("mayLoad", Unset);
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mayLoad_Unset = Unset;
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mayStore = R->getValueAsBitOrUnset("mayStore", Unset);
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mayStore_Unset = Unset;
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hasSideEffects = R->getValueAsBitOrUnset("hasSideEffects", Unset);
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hasSideEffects_Unset = Unset;
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isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove");
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hasExtraSrcRegAllocReq = R->getValueAsBit("hasExtraSrcRegAllocReq");
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hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq");
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isCodeGenOnly = R->getValueAsBit("isCodeGenOnly");
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isPseudo = R->getValueAsBit("isPseudo");
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ImplicitDefs = R->getValueAsListOfDefs("Defs");
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ImplicitUses = R->getValueAsListOfDefs("Uses");
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// Parse Constraints.
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ParseConstraints(R->getValueAsString("Constraints"), Operands);
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// Parse the DisableEncoding field.
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Operands.ProcessDisableEncoding(R->getValueAsString("DisableEncoding"));
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// First check for a ComplexDeprecationPredicate.
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if (R->getValue("ComplexDeprecationPredicate")) {
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HasComplexDeprecationPredicate = true;
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DeprecatedReason = R->getValueAsString("ComplexDeprecationPredicate");
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} else if (RecordVal *Dep = R->getValue("DeprecatedFeatureMask")) {
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// Check if we have a Subtarget feature mask.
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HasComplexDeprecationPredicate = false;
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DeprecatedReason = Dep->getValue()->getAsString();
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} else {
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// This instruction isn't deprecated.
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HasComplexDeprecationPredicate = false;
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DeprecatedReason = "";
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}
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}
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/// HasOneImplicitDefWithKnownVT - If the instruction has at least one
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/// implicit def and it has a known VT, return the VT, otherwise return
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/// MVT::Other.
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MVT::SimpleValueType CodeGenInstruction::
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HasOneImplicitDefWithKnownVT(const CodeGenTarget &TargetInfo) const {
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if (ImplicitDefs.empty()) return MVT::Other;
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// Check to see if the first implicit def has a resolvable type.
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Record *FirstImplicitDef = ImplicitDefs[0];
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assert(FirstImplicitDef->isSubClassOf("Register"));
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const std::vector<MVT::SimpleValueType> &RegVTs =
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TargetInfo.getRegisterVTs(FirstImplicitDef);
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if (RegVTs.size() == 1)
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return RegVTs[0];
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return MVT::Other;
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}
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/// FlattenAsmStringVariants - Flatten the specified AsmString to only
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/// include text from the specified variant, returning the new string.
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std::string CodeGenInstruction::
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FlattenAsmStringVariants(StringRef Cur, unsigned Variant) {
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std::string Res = "";
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for (;;) {
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// Find the start of the next variant string.
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size_t VariantsStart = 0;
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for (size_t e = Cur.size(); VariantsStart != e; ++VariantsStart)
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if (Cur[VariantsStart] == '{' &&
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(VariantsStart == 0 || (Cur[VariantsStart-1] != '$' &&
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Cur[VariantsStart-1] != '\\')))
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break;
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// Add the prefix to the result.
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Res += Cur.slice(0, VariantsStart);
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if (VariantsStart == Cur.size())
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break;
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++VariantsStart; // Skip the '{'.
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// Scan to the end of the variants string.
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size_t VariantsEnd = VariantsStart;
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unsigned NestedBraces = 1;
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for (size_t e = Cur.size(); VariantsEnd != e; ++VariantsEnd) {
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if (Cur[VariantsEnd] == '}' && Cur[VariantsEnd-1] != '\\') {
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if (--NestedBraces == 0)
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break;
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} else if (Cur[VariantsEnd] == '{')
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++NestedBraces;
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}
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// Select the Nth variant (or empty).
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StringRef Selection = Cur.slice(VariantsStart, VariantsEnd);
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for (unsigned i = 0; i != Variant; ++i)
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Selection = Selection.split('|').second;
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Res += Selection.split('|').first;
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assert(VariantsEnd != Cur.size() &&
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"Unterminated variants in assembly string!");
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Cur = Cur.substr(VariantsEnd + 1);
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}
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return Res;
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}
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//===----------------------------------------------------------------------===//
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/// CodeGenInstAlias Implementation
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//===----------------------------------------------------------------------===//
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/// tryAliasOpMatch - This is a helper function for the CodeGenInstAlias
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/// constructor. It checks if an argument in an InstAlias pattern matches
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/// the corresponding operand of the instruction. It returns true on a
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/// successful match, with ResOp set to the result operand to be used.
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bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo,
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Record *InstOpRec, bool hasSubOps,
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ArrayRef<SMLoc> Loc, CodeGenTarget &T,
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ResultOperand &ResOp) {
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Init *Arg = Result->getArg(AliasOpNo);
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DefInit *ADI = dyn_cast<DefInit>(Arg);
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Record *ResultRecord = ADI ? ADI->getDef() : nullptr;
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if (ADI && ADI->getDef() == InstOpRec) {
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// If the operand is a record, it must have a name, and the record type
|
|
// must match up with the instruction's argument type.
|
|
if (!Result->getArgName(AliasOpNo))
|
|
PrintFatalError(Loc, "result argument #" + Twine(AliasOpNo) +
|
|
" must have a name!");
|
|
ResOp = ResultOperand(Result->getArgNameStr(AliasOpNo), ResultRecord);
|
|
return true;
|
|
}
|
|
|
|
// For register operands, the source register class can be a subclass
|
|
// of the instruction register class, not just an exact match.
|
|
if (InstOpRec->isSubClassOf("RegisterOperand"))
|
|
InstOpRec = InstOpRec->getValueAsDef("RegClass");
|
|
|
|
if (ADI && ADI->getDef()->isSubClassOf("RegisterOperand"))
|
|
ADI = ADI->getDef()->getValueAsDef("RegClass")->getDefInit();
|
|
|
|
if (ADI && ADI->getDef()->isSubClassOf("RegisterClass")) {
|
|
if (!InstOpRec->isSubClassOf("RegisterClass"))
|
|
return false;
|
|
if (!T.getRegisterClass(InstOpRec)
|
|
.hasSubClass(&T.getRegisterClass(ADI->getDef())))
|
|
return false;
|
|
ResOp = ResultOperand(Result->getArgNameStr(AliasOpNo), ResultRecord);
|
|
return true;
|
|
}
|
|
|
|
// Handle explicit registers.
|
|
if (ADI && ADI->getDef()->isSubClassOf("Register")) {
|
|
if (InstOpRec->isSubClassOf("OptionalDefOperand")) {
|
|
DagInit *DI = InstOpRec->getValueAsDag("MIOperandInfo");
|
|
// The operand info should only have a single (register) entry. We
|
|
// want the register class of it.
|
|
InstOpRec = cast<DefInit>(DI->getArg(0))->getDef();
|
|
}
|
|
|
|
if (!InstOpRec->isSubClassOf("RegisterClass"))
|
|
return false;
|
|
|
|
if (!T.getRegisterClass(InstOpRec)
|
|
.contains(T.getRegBank().getReg(ADI->getDef())))
|
|
PrintFatalError(Loc, "fixed register " + ADI->getDef()->getName() +
|
|
" is not a member of the " + InstOpRec->getName() +
|
|
" register class!");
|
|
|
|
if (Result->getArgName(AliasOpNo))
|
|
PrintFatalError(Loc, "result fixed register argument must "
|
|
"not have a name!");
|
|
|
|
ResOp = ResultOperand(ResultRecord);
|
|
return true;
|
|
}
|
|
|
|
// Handle "zero_reg" for optional def operands.
|
|
if (ADI && ADI->getDef()->getName() == "zero_reg") {
|
|
|
|
// Check if this is an optional def.
|
|
// Tied operands where the source is a sub-operand of a complex operand
|
|
// need to represent both operands in the alias destination instruction.
|
|
// Allow zero_reg for the tied portion. This can and should go away once
|
|
// the MC representation of things doesn't use tied operands at all.
|
|
//if (!InstOpRec->isSubClassOf("OptionalDefOperand"))
|
|
// throw TGError(Loc, "reg0 used for result that is not an "
|
|
// "OptionalDefOperand!");
|
|
|
|
ResOp = ResultOperand(static_cast<Record*>(nullptr));
|
|
return true;
|
|
}
|
|
|
|
// Literal integers.
|
|
if (IntInit *II = dyn_cast<IntInit>(Arg)) {
|
|
if (hasSubOps || !InstOpRec->isSubClassOf("Operand"))
|
|
return false;
|
|
// Integer arguments can't have names.
|
|
if (Result->getArgName(AliasOpNo))
|
|
PrintFatalError(Loc, "result argument #" + Twine(AliasOpNo) +
|
|
" must not have a name!");
|
|
ResOp = ResultOperand(II->getValue());
|
|
return true;
|
|
}
|
|
|
|
// Bits<n> (also used for 0bxx literals)
|
|
if (BitsInit *BI = dyn_cast<BitsInit>(Arg)) {
|
|
if (hasSubOps || !InstOpRec->isSubClassOf("Operand"))
|
|
return false;
|
|
if (!BI->isComplete())
|
|
return false;
|
|
// Convert the bits init to an integer and use that for the result.
|
|
IntInit *II =
|
|
dyn_cast_or_null<IntInit>(BI->convertInitializerTo(IntRecTy::get()));
|
|
if (!II)
|
|
return false;
|
|
ResOp = ResultOperand(II->getValue());
|
|
return true;
|
|
}
|
|
|
|
// If both are Operands with the same MVT, allow the conversion. It's
|
|
// up to the user to make sure the values are appropriate, just like
|
|
// for isel Pat's.
|
|
if (InstOpRec->isSubClassOf("Operand") && ADI &&
|
|
ADI->getDef()->isSubClassOf("Operand")) {
|
|
// FIXME: What other attributes should we check here? Identical
|
|
// MIOperandInfo perhaps?
|
|
if (InstOpRec->getValueInit("Type") != ADI->getDef()->getValueInit("Type"))
|
|
return false;
|
|
ResOp = ResultOperand(Result->getArgNameStr(AliasOpNo), ADI->getDef());
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
unsigned CodeGenInstAlias::ResultOperand::getMINumOperands() const {
|
|
if (!isRecord())
|
|
return 1;
|
|
|
|
Record *Rec = getRecord();
|
|
if (!Rec->isSubClassOf("Operand"))
|
|
return 1;
|
|
|
|
DagInit *MIOpInfo = Rec->getValueAsDag("MIOperandInfo");
|
|
if (MIOpInfo->getNumArgs() == 0) {
|
|
// Unspecified, so it defaults to 1
|
|
return 1;
|
|
}
|
|
|
|
return MIOpInfo->getNumArgs();
|
|
}
|
|
|
|
CodeGenInstAlias::CodeGenInstAlias(Record *R, unsigned Variant,
|
|
CodeGenTarget &T)
|
|
: TheDef(R) {
|
|
Result = R->getValueAsDag("ResultInst");
|
|
AsmString = R->getValueAsString("AsmString");
|
|
AsmString = CodeGenInstruction::FlattenAsmStringVariants(AsmString, Variant);
|
|
|
|
|
|
// Verify that the root of the result is an instruction.
|
|
DefInit *DI = dyn_cast<DefInit>(Result->getOperator());
|
|
if (!DI || !DI->getDef()->isSubClassOf("Instruction"))
|
|
PrintFatalError(R->getLoc(),
|
|
"result of inst alias should be an instruction");
|
|
|
|
ResultInst = &T.getInstruction(DI->getDef());
|
|
|
|
// NameClass - If argument names are repeated, we need to verify they have
|
|
// the same class.
|
|
StringMap<Record*> NameClass;
|
|
for (unsigned i = 0, e = Result->getNumArgs(); i != e; ++i) {
|
|
DefInit *ADI = dyn_cast<DefInit>(Result->getArg(i));
|
|
if (!ADI || !Result->getArgName(i))
|
|
continue;
|
|
// Verify we don't have something like: (someinst GR16:$foo, GR32:$foo)
|
|
// $foo can exist multiple times in the result list, but it must have the
|
|
// same type.
|
|
Record *&Entry = NameClass[Result->getArgNameStr(i)];
|
|
if (Entry && Entry != ADI->getDef())
|
|
PrintFatalError(R->getLoc(), "result value $" + Result->getArgNameStr(i) +
|
|
" is both " + Entry->getName() + " and " +
|
|
ADI->getDef()->getName() + "!");
|
|
Entry = ADI->getDef();
|
|
}
|
|
|
|
// Decode and validate the arguments of the result.
|
|
unsigned AliasOpNo = 0;
|
|
for (unsigned i = 0, e = ResultInst->Operands.size(); i != e; ++i) {
|
|
|
|
// Tied registers don't have an entry in the result dag unless they're part
|
|
// of a complex operand, in which case we include them anyways, as we
|
|
// don't have any other way to specify the whole operand.
|
|
if (ResultInst->Operands[i].MINumOperands == 1 &&
|
|
ResultInst->Operands[i].getTiedRegister() != -1)
|
|
continue;
|
|
|
|
if (AliasOpNo >= Result->getNumArgs())
|
|
PrintFatalError(R->getLoc(), "not enough arguments for instruction!");
|
|
|
|
Record *InstOpRec = ResultInst->Operands[i].Rec;
|
|
unsigned NumSubOps = ResultInst->Operands[i].MINumOperands;
|
|
ResultOperand ResOp(static_cast<int64_t>(0));
|
|
if (tryAliasOpMatch(Result, AliasOpNo, InstOpRec, (NumSubOps > 1),
|
|
R->getLoc(), T, ResOp)) {
|
|
// If this is a simple operand, or a complex operand with a custom match
|
|
// class, then we can match is verbatim.
|
|
if (NumSubOps == 1 ||
|
|
(InstOpRec->getValue("ParserMatchClass") &&
|
|
InstOpRec->getValueAsDef("ParserMatchClass")
|
|
->getValueAsString("Name") != "Imm")) {
|
|
ResultOperands.push_back(ResOp);
|
|
ResultInstOperandIndex.push_back(std::make_pair(i, -1));
|
|
++AliasOpNo;
|
|
|
|
// Otherwise, we need to match each of the suboperands individually.
|
|
} else {
|
|
DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo;
|
|
for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) {
|
|
Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef();
|
|
|
|
// Take care to instantiate each of the suboperands with the correct
|
|
// nomenclature: $foo.bar
|
|
ResultOperands.emplace_back(
|
|
Result->getArgName(AliasOpNo)->getAsUnquotedString() + "." +
|
|
MIOI->getArgName(SubOp)->getAsUnquotedString(), SubRec);
|
|
ResultInstOperandIndex.push_back(std::make_pair(i, SubOp));
|
|
}
|
|
++AliasOpNo;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// If the argument did not match the instruction operand, and the operand
|
|
// is composed of multiple suboperands, try matching the suboperands.
|
|
if (NumSubOps > 1) {
|
|
DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo;
|
|
for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) {
|
|
if (AliasOpNo >= Result->getNumArgs())
|
|
PrintFatalError(R->getLoc(), "not enough arguments for instruction!");
|
|
Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef();
|
|
if (tryAliasOpMatch(Result, AliasOpNo, SubRec, false,
|
|
R->getLoc(), T, ResOp)) {
|
|
ResultOperands.push_back(ResOp);
|
|
ResultInstOperandIndex.push_back(std::make_pair(i, SubOp));
|
|
++AliasOpNo;
|
|
} else {
|
|
PrintFatalError(R->getLoc(), "result argument #" + Twine(AliasOpNo) +
|
|
" does not match instruction operand class " +
|
|
(SubOp == 0 ? InstOpRec->getName() :SubRec->getName()));
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
PrintFatalError(R->getLoc(), "result argument #" + Twine(AliasOpNo) +
|
|
" does not match instruction operand class " +
|
|
InstOpRec->getName());
|
|
}
|
|
|
|
if (AliasOpNo != Result->getNumArgs())
|
|
PrintFatalError(R->getLoc(), "too many operands for instruction!");
|
|
}
|