| //===- CallingConvEmitter.cpp - Generate calling conventions --------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This tablegen backend is responsible for emitting descriptions of the calling |
| // conventions supported by this target. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CallingConvEmitter.h" |
| #include "Record.h" |
| #include "CodeGenTarget.h" |
| using namespace llvm; |
| |
| void CallingConvEmitter::run(raw_ostream &O) { |
| EmitSourceFileHeader("Calling Convention Implementation Fragment", O); |
| |
| std::vector<Record*> CCs = Records.getAllDerivedDefinitions("CallingConv"); |
| |
| // Emit prototypes for all of the CC's so that they can forward ref each |
| // other. |
| for (unsigned i = 0, e = CCs.size(); i != e; ++i) { |
| O << "static bool " << CCs[i]->getName() |
| << "(unsigned ValNo, EVT ValVT,\n" |
| << std::string(CCs[i]->getName().size()+13, ' ') |
| << "EVT LocVT, CCValAssign::LocInfo LocInfo,\n" |
| << std::string(CCs[i]->getName().size()+13, ' ') |
| << "ISD::ArgFlagsTy ArgFlags, CCState &State);\n"; |
| } |
| |
| // Emit each calling convention description in full. |
| for (unsigned i = 0, e = CCs.size(); i != e; ++i) |
| EmitCallingConv(CCs[i], O); |
| } |
| |
| |
| void CallingConvEmitter::EmitCallingConv(Record *CC, raw_ostream &O) { |
| ListInit *CCActions = CC->getValueAsListInit("Actions"); |
| Counter = 0; |
| |
| O << "\n\nstatic bool " << CC->getName() |
| << "(unsigned ValNo, EVT ValVT,\n" |
| << std::string(CC->getName().size()+13, ' ') |
| << "EVT LocVT, CCValAssign::LocInfo LocInfo,\n" |
| << std::string(CC->getName().size()+13, ' ') |
| << "ISD::ArgFlagsTy ArgFlags, CCState &State) {\n"; |
| // Emit all of the actions, in order. |
| for (unsigned i = 0, e = CCActions->getSize(); i != e; ++i) { |
| O << "\n"; |
| EmitAction(CCActions->getElementAsRecord(i), 2, O); |
| } |
| |
| O << "\n return true; // CC didn't match.\n"; |
| O << "}\n"; |
| } |
| |
| void CallingConvEmitter::EmitAction(Record *Action, |
| unsigned Indent, raw_ostream &O) { |
| std::string IndentStr = std::string(Indent, ' '); |
| |
| if (Action->isSubClassOf("CCPredicateAction")) { |
| O << IndentStr << "if ("; |
| |
| if (Action->isSubClassOf("CCIfType")) { |
| ListInit *VTs = Action->getValueAsListInit("VTs"); |
| for (unsigned i = 0, e = VTs->getSize(); i != e; ++i) { |
| Record *VT = VTs->getElementAsRecord(i); |
| if (i != 0) O << " ||\n " << IndentStr; |
| O << "LocVT == " << getEnumName(getValueType(VT)); |
| } |
| |
| } else if (Action->isSubClassOf("CCIf")) { |
| O << Action->getValueAsString("Predicate"); |
| } else { |
| Action->dump(); |
| throw "Unknown CCPredicateAction!"; |
| } |
| |
| O << ") {\n"; |
| EmitAction(Action->getValueAsDef("SubAction"), Indent+2, O); |
| O << IndentStr << "}\n"; |
| } else { |
| if (Action->isSubClassOf("CCDelegateTo")) { |
| Record *CC = Action->getValueAsDef("CC"); |
| O << IndentStr << "if (!" << CC->getName() |
| << "(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State))\n" |
| << IndentStr << " return false;\n"; |
| } else if (Action->isSubClassOf("CCAssignToReg")) { |
| ListInit *RegList = Action->getValueAsListInit("RegList"); |
| if (RegList->getSize() == 1) { |
| O << IndentStr << "if (unsigned Reg = State.AllocateReg("; |
| O << getQualifiedName(RegList->getElementAsRecord(0)) << ")) {\n"; |
| } else { |
| O << IndentStr << "static const unsigned RegList" << ++Counter |
| << "[] = {\n"; |
| O << IndentStr << " "; |
| for (unsigned i = 0, e = RegList->getSize(); i != e; ++i) { |
| if (i != 0) O << ", "; |
| O << getQualifiedName(RegList->getElementAsRecord(i)); |
| } |
| O << "\n" << IndentStr << "};\n"; |
| O << IndentStr << "if (unsigned Reg = State.AllocateReg(RegList" |
| << Counter << ", " << RegList->getSize() << ")) {\n"; |
| } |
| O << IndentStr << " State.addLoc(CCValAssign::getReg(ValNo, ValVT, " |
| << "Reg, LocVT, LocInfo));\n"; |
| O << IndentStr << " return false;\n"; |
| O << IndentStr << "}\n"; |
| } else if (Action->isSubClassOf("CCAssignToRegWithShadow")) { |
| ListInit *RegList = Action->getValueAsListInit("RegList"); |
| ListInit *ShadowRegList = Action->getValueAsListInit("ShadowRegList"); |
| if (ShadowRegList->getSize() >0 && |
| ShadowRegList->getSize() != RegList->getSize()) |
| throw "Invalid length of list of shadowed registers"; |
| |
| if (RegList->getSize() == 1) { |
| O << IndentStr << "if (unsigned Reg = State.AllocateReg("; |
| O << getQualifiedName(RegList->getElementAsRecord(0)); |
| O << ", " << getQualifiedName(ShadowRegList->getElementAsRecord(0)); |
| O << ")) {\n"; |
| } else { |
| unsigned RegListNumber = ++Counter; |
| unsigned ShadowRegListNumber = ++Counter; |
| |
| O << IndentStr << "static const unsigned RegList" << RegListNumber |
| << "[] = {\n"; |
| O << IndentStr << " "; |
| for (unsigned i = 0, e = RegList->getSize(); i != e; ++i) { |
| if (i != 0) O << ", "; |
| O << getQualifiedName(RegList->getElementAsRecord(i)); |
| } |
| O << "\n" << IndentStr << "};\n"; |
| |
| O << IndentStr << "static const unsigned RegList" |
| << ShadowRegListNumber << "[] = {\n"; |
| O << IndentStr << " "; |
| for (unsigned i = 0, e = ShadowRegList->getSize(); i != e; ++i) { |
| if (i != 0) O << ", "; |
| O << getQualifiedName(ShadowRegList->getElementAsRecord(i)); |
| } |
| O << "\n" << IndentStr << "};\n"; |
| |
| O << IndentStr << "if (unsigned Reg = State.AllocateReg(RegList" |
| << RegListNumber << ", " << "RegList" << ShadowRegListNumber |
| << ", " << RegList->getSize() << ")) {\n"; |
| } |
| O << IndentStr << " State.addLoc(CCValAssign::getReg(ValNo, ValVT, " |
| << "Reg, LocVT, LocInfo));\n"; |
| O << IndentStr << " return false;\n"; |
| O << IndentStr << "}\n"; |
| } else if (Action->isSubClassOf("CCAssignToStack")) { |
| int Size = Action->getValueAsInt("Size"); |
| int Align = Action->getValueAsInt("Align"); |
| |
| O << IndentStr << "unsigned Offset" << ++Counter |
| << " = State.AllocateStack("; |
| if (Size) |
| O << Size << ", "; |
| else |
| O << "\n" << IndentStr << " State.getTarget().getTargetData()" |
| "->getTypeAllocSize(LocVT.getTypeForEVT(State.getContext())), "; |
| if (Align) |
| O << Align; |
| else |
| O << "\n" << IndentStr << " State.getTarget().getTargetData()" |
| "->getABITypeAlignment(LocVT.getTypeForEVT(State.getContext()))"; |
| if (Action->isSubClassOf("CCAssignToStackWithShadow")) |
| O << ", " << getQualifiedName(Action->getValueAsDef("ShadowReg")); |
| O << ");\n" << IndentStr |
| << "State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset" |
| << Counter << ", LocVT, LocInfo));\n"; |
| O << IndentStr << "return false;\n"; |
| } else if (Action->isSubClassOf("CCPromoteToType")) { |
| Record *DestTy = Action->getValueAsDef("DestTy"); |
| O << IndentStr << "LocVT = " << getEnumName(getValueType(DestTy)) <<";\n"; |
| O << IndentStr << "if (ArgFlags.isSExt())\n" |
| << IndentStr << IndentStr << "LocInfo = CCValAssign::SExt;\n" |
| << IndentStr << "else if (ArgFlags.isZExt())\n" |
| << IndentStr << IndentStr << "LocInfo = CCValAssign::ZExt;\n" |
| << IndentStr << "else\n" |
| << IndentStr << IndentStr << "LocInfo = CCValAssign::AExt;\n"; |
| } else if (Action->isSubClassOf("CCBitConvertToType")) { |
| Record *DestTy = Action->getValueAsDef("DestTy"); |
| O << IndentStr << "LocVT = " << getEnumName(getValueType(DestTy)) <<";\n"; |
| O << IndentStr << "LocInfo = CCValAssign::BCvt;\n"; |
| } else if (Action->isSubClassOf("CCPassIndirect")) { |
| Record *DestTy = Action->getValueAsDef("DestTy"); |
| O << IndentStr << "LocVT = " << getEnumName(getValueType(DestTy)) <<";\n"; |
| O << IndentStr << "LocInfo = CCValAssign::Indirect;\n"; |
| } else if (Action->isSubClassOf("CCPassByVal")) { |
| int Size = Action->getValueAsInt("Size"); |
| int Align = Action->getValueAsInt("Align"); |
| O << IndentStr |
| << "State.HandleByVal(ValNo, ValVT, LocVT, LocInfo, " |
| << Size << ", " << Align << ", ArgFlags);\n"; |
| O << IndentStr << "return false;\n"; |
| } else if (Action->isSubClassOf("CCCustom")) { |
| O << IndentStr |
| << "if (" << Action->getValueAsString("FuncName") << "(ValNo, ValVT, " |
| << "LocVT, LocInfo, ArgFlags, State))\n"; |
| O << IndentStr << IndentStr << "return false;\n"; |
| } else { |
| Action->dump(); |
| throw "Unknown CCAction!"; |
| } |
| } |
| } |
