mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 19:52:54 +01:00
285 lines
11 KiB
C++
285 lines
11 KiB
C++
//===- 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 "CodeGenTarget.h"
|
|
#include "llvm/TableGen/Error.h"
|
|
#include "llvm/TableGen/Record.h"
|
|
#include "llvm/TableGen/TableGenBackend.h"
|
|
#include <cassert>
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
class CallingConvEmitter {
|
|
RecordKeeper &Records;
|
|
public:
|
|
explicit CallingConvEmitter(RecordKeeper &R) : Records(R) {}
|
|
|
|
void run(raw_ostream &o);
|
|
|
|
private:
|
|
void EmitCallingConv(Record *CC, raw_ostream &O);
|
|
void EmitAction(Record *Action, unsigned Indent, raw_ostream &O);
|
|
unsigned Counter;
|
|
};
|
|
} // End anonymous namespace
|
|
|
|
void CallingConvEmitter::run(raw_ostream &O) {
|
|
std::vector<Record*> CCs = Records.getAllDerivedDefinitions("CallingConv");
|
|
|
|
// Emit prototypes for all of the non-custom CC's so that they can forward ref
|
|
// each other.
|
|
for (Record *CC : CCs) {
|
|
if (!CC->getValueAsBit("Custom")) {
|
|
O << "static bool " << CC->getName()
|
|
<< "(unsigned ValNo, MVT ValVT,\n"
|
|
<< std::string(CC->getName().size() + 13, ' ')
|
|
<< "MVT LocVT, CCValAssign::LocInfo LocInfo,\n"
|
|
<< std::string(CC->getName().size() + 13, ' ')
|
|
<< "ISD::ArgFlagsTy ArgFlags, CCState &State);\n";
|
|
}
|
|
}
|
|
|
|
// Emit each non-custom calling convention description in full.
|
|
for (Record *CC : CCs) {
|
|
if (!CC->getValueAsBit("Custom"))
|
|
EmitCallingConv(CC, O);
|
|
}
|
|
}
|
|
|
|
|
|
void CallingConvEmitter::EmitCallingConv(Record *CC, raw_ostream &O) {
|
|
ListInit *CCActions = CC->getValueAsListInit("Actions");
|
|
Counter = 0;
|
|
|
|
O << "\n\nstatic bool " << CC->getName()
|
|
<< "(unsigned ValNo, MVT ValVT,\n"
|
|
<< std::string(CC->getName().size()+13, ' ')
|
|
<< "MVT 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->size(); 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->size(); 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 {
|
|
errs() << *Action;
|
|
PrintFatalError("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->size() == 1) {
|
|
O << IndentStr << "if (unsigned Reg = State.AllocateReg(";
|
|
O << getQualifiedName(RegList->getElementAsRecord(0)) << ")) {\n";
|
|
} else {
|
|
O << IndentStr << "static const MCPhysReg RegList" << ++Counter
|
|
<< "[] = {\n";
|
|
O << IndentStr << " ";
|
|
for (unsigned i = 0, e = RegList->size(); 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 << ")) {\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->empty() && ShadowRegList->size() != RegList->size())
|
|
PrintFatalError("Invalid length of list of shadowed registers");
|
|
|
|
if (RegList->size() == 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 MCPhysReg RegList" << RegListNumber
|
|
<< "[] = {\n";
|
|
O << IndentStr << " ";
|
|
for (unsigned i = 0, e = RegList->size(); i != e; ++i) {
|
|
if (i != 0) O << ", ";
|
|
O << getQualifiedName(RegList->getElementAsRecord(i));
|
|
}
|
|
O << "\n" << IndentStr << "};\n";
|
|
|
|
O << IndentStr << "static const MCPhysReg RegList"
|
|
<< ShadowRegListNumber << "[] = {\n";
|
|
O << IndentStr << " ";
|
|
for (unsigned i = 0, e = ShadowRegList->size(); 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
|
|
<< ")) {\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.getMachineFunction().getDataLayout()."
|
|
"getTypeAllocSize(EVT(LocVT).getTypeForEVT(State.getContext())),"
|
|
" ";
|
|
if (Align)
|
|
O << Align;
|
|
else
|
|
O << "\n" << IndentStr
|
|
<< " State.getMachineFunction().getDataLayout()."
|
|
"getABITypeAlignment(EVT(LocVT).getTypeForEVT(State.getContext()"
|
|
"))";
|
|
O << ");\n" << IndentStr
|
|
<< "State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset"
|
|
<< Counter << ", LocVT, LocInfo));\n";
|
|
O << IndentStr << "return false;\n";
|
|
} else if (Action->isSubClassOf("CCAssignToStackWithShadow")) {
|
|
int Size = Action->getValueAsInt("Size");
|
|
int Align = Action->getValueAsInt("Align");
|
|
ListInit *ShadowRegList = Action->getValueAsListInit("ShadowRegList");
|
|
|
|
unsigned ShadowRegListNumber = ++Counter;
|
|
|
|
O << IndentStr << "static const MCPhysReg ShadowRegList"
|
|
<< ShadowRegListNumber << "[] = {\n";
|
|
O << IndentStr << " ";
|
|
for (unsigned i = 0, e = ShadowRegList->size(); i != e; ++i) {
|
|
if (i != 0) O << ", ";
|
|
O << getQualifiedName(ShadowRegList->getElementAsRecord(i));
|
|
}
|
|
O << "\n" << IndentStr << "};\n";
|
|
|
|
O << IndentStr << "unsigned Offset" << ++Counter
|
|
<< " = State.AllocateStack("
|
|
<< Size << ", " << Align << ", "
|
|
<< "ShadowRegList" << ShadowRegListNumber << ");\n";
|
|
O << 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");
|
|
MVT::SimpleValueType DestVT = getValueType(DestTy);
|
|
O << IndentStr << "LocVT = " << getEnumName(DestVT) <<";\n";
|
|
if (MVT(DestVT).isFloatingPoint()) {
|
|
O << IndentStr << "LocInfo = CCValAssign::FPExt;\n";
|
|
} else {
|
|
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("CCPromoteToUpperBitsInType")) {
|
|
Record *DestTy = Action->getValueAsDef("DestTy");
|
|
MVT::SimpleValueType DestVT = getValueType(DestTy);
|
|
O << IndentStr << "LocVT = " << getEnumName(DestVT) << ";\n";
|
|
if (MVT(DestVT).isFloatingPoint()) {
|
|
PrintFatalError("CCPromoteToUpperBitsInType does not handle floating "
|
|
"point");
|
|
} else {
|
|
O << IndentStr << "if (ArgFlags.isSExt())\n"
|
|
<< IndentStr << IndentStr << "LocInfo = CCValAssign::SExtUpper;\n"
|
|
<< IndentStr << "else if (ArgFlags.isZExt())\n"
|
|
<< IndentStr << IndentStr << "LocInfo = CCValAssign::ZExtUpper;\n"
|
|
<< IndentStr << "else\n"
|
|
<< IndentStr << IndentStr << "LocInfo = CCValAssign::AExtUpper;\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 {
|
|
errs() << *Action;
|
|
PrintFatalError("Unknown CCAction!");
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace llvm {
|
|
|
|
void EmitCallingConv(RecordKeeper &RK, raw_ostream &OS) {
|
|
emitSourceFileHeader("Calling Convention Implementation Fragment", OS);
|
|
CallingConvEmitter(RK).run(OS);
|
|
}
|
|
|
|
} // End llvm namespace
|