mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-09 10:29:21 +00:00
1440e8b918
value type, so there is no point in passing it around using an EVT. Use the simpler MVT everywhere. Rather than trying to propagate this information maximally in all the code that using the calling convention stuff, I chose to do a mainly low impact change instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118167 91177308-0d34-0410-b5e6-96231b3b80d8
213 lines
8.7 KiB
C++
213 lines
8.7 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 "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, ' ')
|
|
<< "MVT 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, ' ')
|
|
<< "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->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(EVT(LocVT).getTypeForEVT(State.getContext())), ";
|
|
if (Align)
|
|
O << Align;
|
|
else
|
|
O << "\n" << IndentStr << " State.getTarget().getTargetData()"
|
|
"->getABITypeAlignment(EVT(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!";
|
|
}
|
|
}
|
|
}
|