forked from OSchip/llvm-project
parent
31acef50ad
commit
bf5f3945fd
|
@ -0,0 +1,128 @@
|
|||
//===- CallingConvEmitter.cpp - Generate calling conventions --------------===//
|
||||
//
|
||||
// The LLVM Compiler Infrastructure
|
||||
//
|
||||
// This file was developed by Chris Lattner and 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(std::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, MVT::ValueType ValVT, MVT::ValueType LocVT,\n"
|
||||
<< std::string(CCs[i]->getName().size()+13, ' ')
|
||||
<< "CCValAssign::LocInfo LocInfo, unsigned 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, std::ostream &O) {
|
||||
ListInit *CCActions = CC->getValueAsListInit("Actions");
|
||||
Counter = 0;
|
||||
|
||||
O << "\n\nstatic bool " << CC->getName()
|
||||
<< "(unsigned ValNo, MVT::ValueType ValVT, MVT::ValueType LocVT,\n"
|
||||
<< std::string(CC->getName().size()+13, ' ')
|
||||
<< "CCValAssign::LocInfo LocInfo, "
|
||||
<< "unsigned 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, std::ostream &O) {
|
||||
std::string IndentStr = std::string(Indent, ' ');
|
||||
|
||||
if (Action->isSubClassOf("CCPredicateAction")) {
|
||||
O << IndentStr << "if (";
|
||||
|
||||
if (Action->isSubClassOf("CCMatchType")) {
|
||||
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("CCMatchIf")) {
|
||||
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("CCAssignToStack")) {
|
||||
int Size = Action->getValueAsInt("Size");
|
||||
int Align = Action->getValueAsInt("Align");
|
||||
|
||||
O << IndentStr << "unsigned Offset" << ++Counter
|
||||
<< " = State.AllocateStack(" << Size << ", " << Align << ");\n";
|
||||
O << IndentStr << "State.addLoc(CCValAssign::getMem(ValNo, ArgVT, Offset"
|
||||
<< Counter << ", LocVT, LocInfo));\n";
|
||||
O << IndentStr << "return false;\n";
|
||||
} else if (Action->isSubClassOf("CCPromoteToType")) {
|
||||
|
||||
} else {
|
||||
Action->dump();
|
||||
throw "Unknown CCAction!";
|
||||
}
|
||||
}
|
||||
}
|
|
@ -0,0 +1,38 @@
|
|||
//===- CallingConvEmitter.h - Generate calling conventions ------*- C++ -*-===//
|
||||
//
|
||||
// The LLVM Compiler Infrastructure
|
||||
//
|
||||
// This file was developed by Chris Lattner and 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.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#ifndef CALLINGCONV_EMITTER_H
|
||||
#define CALLINGCONV_EMITTER_H
|
||||
|
||||
#include "TableGenBackend.h"
|
||||
#include <map>
|
||||
#include <vector>
|
||||
#include <cassert>
|
||||
|
||||
namespace llvm {
|
||||
class CallingConvEmitter : public TableGenBackend {
|
||||
RecordKeeper &Records;
|
||||
public:
|
||||
CallingConvEmitter(RecordKeeper &R) : Records(R) {}
|
||||
|
||||
// run - Output the asmwriter, returning true on failure.
|
||||
void run(std::ostream &o);
|
||||
|
||||
private:
|
||||
void EmitCallingConv(Record *CC, std::ostream &O);
|
||||
void EmitAction(Record *Action, unsigned Indent, std::ostream &O);
|
||||
unsigned Counter;
|
||||
};
|
||||
}
|
||||
#endif
|
Loading…
Reference in New Issue