llvm-6502/lib/Target/Alpha/AlphaISelLowering.cpp

714 lines
26 KiB
C++
Raw Normal View History

//===-- AlphaISelLowering.cpp - Alpha DAG Lowering Implementation ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Andrew Lenharth and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the AlphaISelLowering class.
//
//===----------------------------------------------------------------------===//
#include "AlphaISelLowering.h"
#include "AlphaTargetMachine.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SSARegMap.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/Module.h"
#include "llvm/Support/CommandLine.h"
#include <iostream>
using namespace llvm;
namespace llvm {
cl::opt<bool> EnableAlphaLSMark("enable-alpha-lsmark",
cl::desc("Emit symbols to correlate Mem ops to LLVM Values"),
cl::Hidden);
}
/// AddLiveIn - This helper function adds the specified physical register to the
/// MachineFunction as a live in value. It also creates a corresponding virtual
/// register for it.
static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
TargetRegisterClass *RC) {
assert(RC->contains(PReg) && "Not the correct regclass!");
unsigned VReg = MF.getSSARegMap()->createVirtualRegister(RC);
MF.addLiveIn(PReg, VReg);
return VReg;
}
AlphaTargetLowering::AlphaTargetLowering(TargetMachine &TM) : TargetLowering(TM) {
// Set up the TargetLowering object.
//I am having problems with shr n ubyte 1
setShiftAmountType(MVT::i64);
setSetCCResultType(MVT::i64);
setSetCCResultContents(ZeroOrOneSetCCResult);
addRegisterClass(MVT::i64, Alpha::GPRCRegisterClass);
addRegisterClass(MVT::f64, Alpha::F8RCRegisterClass);
addRegisterClass(MVT::f32, Alpha::F4RCRegisterClass);
setOperationAction(ISD::BRCONDTWOWAY, MVT::Other, Expand);
setOperationAction(ISD::BRTWOWAY_CC, MVT::Other, Expand);
setOperationAction(ISD::BR_CC, MVT::Other, Expand);
setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
setOperationAction(ISD::EXTLOAD, MVT::i1, Promote);
setOperationAction(ISD::EXTLOAD, MVT::f32, Expand);
setOperationAction(ISD::ZEXTLOAD, MVT::i1, Promote);
setOperationAction(ISD::ZEXTLOAD, MVT::i32, Expand);
setOperationAction(ISD::SEXTLOAD, MVT::i1, Promote);
setOperationAction(ISD::SEXTLOAD, MVT::i8, Expand);
setOperationAction(ISD::SEXTLOAD, MVT::i16, Expand);
setOperationAction(ISD::TRUNCSTORE, MVT::i1, Promote);
if (EnableAlphaLSMark) {
setOperationAction(ISD::LOAD, MVT::i64, Custom);
setOperationAction(ISD::LOAD, MVT::f64, Custom);
setOperationAction(ISD::LOAD, MVT::f32, Custom);
setOperationAction(ISD::ZEXTLOAD, MVT::i8, Custom);
setOperationAction(ISD::ZEXTLOAD, MVT::i16, Custom);
setOperationAction(ISD::SEXTLOAD, MVT::i32, Custom);
setOperationAction(ISD::EXTLOAD, MVT::i8, Custom);
setOperationAction(ISD::EXTLOAD, MVT::i16, Custom);
setOperationAction(ISD::EXTLOAD, MVT::i32, Custom);
}
setOperationAction(ISD::FREM, MVT::f32, Expand);
setOperationAction(ISD::FREM, MVT::f64, Expand);
setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
if (!TM.getSubtarget<AlphaSubtarget>().hasCT()) {
setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
setOperationAction(ISD::CTLZ , MVT::i64 , Expand);
}
setOperationAction(ISD::BSWAP , MVT::i64, Expand);
setOperationAction(ISD::ROTL , MVT::i64, Expand);
setOperationAction(ISD::ROTR , MVT::i64, Expand);
setOperationAction(ISD::SREM , MVT::i64, Custom);
setOperationAction(ISD::UREM , MVT::i64, Custom);
setOperationAction(ISD::SDIV , MVT::i64, Custom);
setOperationAction(ISD::UDIV , MVT::i64, Custom);
setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
setOperationAction(ISD::MEMSET , MVT::Other, Expand);
setOperationAction(ISD::MEMCPY , MVT::Other, Expand);
// We don't support sin/cos/sqrt
setOperationAction(ISD::FSIN , MVT::f64, Expand);
setOperationAction(ISD::FCOS , MVT::f64, Expand);
setOperationAction(ISD::FSIN , MVT::f32, Expand);
setOperationAction(ISD::FCOS , MVT::f32, Expand);
setOperationAction(ISD::FSQRT, MVT::f64, Expand);
setOperationAction(ISD::FSQRT, MVT::f32, Expand);
// FIXME: Alpha supports fcopysign natively!?
setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
setOperationAction(ISD::SETCC, MVT::f32, Promote);
// We don't have line number support yet.
setOperationAction(ISD::LOCATION, MVT::Other, Expand);
setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
setOperationAction(ISD::DEBUG_LABEL, MVT::Other, Expand);
// Not implemented yet.
setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
// We want to legalize GlobalAddress and ConstantPool and
// ExternalSymbols nodes into the appropriate instructions to
// materialize the address.
setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
setOperationAction(ISD::ExternalSymbol, MVT::i64, Custom);
setOperationAction(ISD::VASTART, MVT::Other, Custom);
setOperationAction(ISD::VAEND, MVT::Other, Expand);
setOperationAction(ISD::VACOPY, MVT::Other, Custom);
setOperationAction(ISD::VAARG, MVT::Other, Custom);
setOperationAction(ISD::VAARG, MVT::i32, Custom);
setStackPointerRegisterToSaveRestore(Alpha::R30);
setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
addLegalFPImmediate(+0.0); //F31
addLegalFPImmediate(-0.0); //-F31
computeRegisterProperties();
useITOF = TM.getSubtarget<AlphaSubtarget>().hasF2I();
}
const char *AlphaTargetLowering::getTargetNodeName(unsigned Opcode) const {
switch (Opcode) {
default: return 0;
case AlphaISD::ITOFT_: return "Alpha::ITOFT_";
case AlphaISD::FTOIT_: return "Alpha::FTOIT_";
case AlphaISD::CVTQT_: return "Alpha::CVTQT_";
case AlphaISD::CVTQS_: return "Alpha::CVTQS_";
case AlphaISD::CVTTQ_: return "Alpha::CVTTQ_";
case AlphaISD::GPRelHi: return "Alpha::GPRelHi";
case AlphaISD::GPRelLo: return "Alpha::GPRelLo";
case AlphaISD::RelLit: return "Alpha::RelLit";
case AlphaISD::GlobalBaseReg: return "Alpha::GlobalBaseReg";
case AlphaISD::CALL: return "Alpha::CALL";
case AlphaISD::DivCall: return "Alpha::DivCall";
case AlphaISD::LDQ_: return "Alpha::LDQ_";
case AlphaISD::LDT_: return "Alpha::LDT_";
case AlphaISD::LDS_: return "Alpha::LDS_";
case AlphaISD::LDL_: return "Alpha::LDL_";
case AlphaISD::LDWU_: return "Alpha::LDWU_";
case AlphaISD::LDBU_: return "Alpha::LDBU_";
case AlphaISD::STQ_: return "Alpha::STQ_";
case AlphaISD::STT_: return "Alpha::STT_";
case AlphaISD::STS_: return "Alpha::STS_";
case AlphaISD::STL_: return "Alpha::STL_";
case AlphaISD::STW_: return "Alpha::STW_";
case AlphaISD::STB_: return "Alpha::STB_";
}
}
//http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PY8AC-TET1_html/callCH3.html#BLOCK21
//For now, just use variable size stack frame format
//In a standard call, the first six items are passed in registers $16
//- $21 and/or registers $f16 - $f21. (See Section 4.1.2 for details
//of argument-to-register correspondence.) The remaining items are
//collected in a memory argument list that is a naturally aligned
//array of quadwords. In a standard call, this list, if present, must
//be passed at 0(SP).
//7 ... n 0(SP) ... (n-7)*8(SP)
// //#define FP $15
// //#define RA $26
// //#define PV $27
// //#define GP $29
// //#define SP $30
std::vector<SDOperand>
AlphaTargetLowering::LowerArguments(Function &F, SelectionDAG &DAG)
{
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
MachineBasicBlock& BB = MF.front();
std::vector<SDOperand> ArgValues;
unsigned args_int[] = {
Alpha::R16, Alpha::R17, Alpha::R18, Alpha::R19, Alpha::R20, Alpha::R21};
unsigned args_float[] = {
Alpha::F16, Alpha::F17, Alpha::F18, Alpha::F19, Alpha::F20, Alpha::F21};
int count = 0;
GP = AddLiveIn(MF, Alpha::R29, getRegClassFor(MVT::i64));
RA = AddLiveIn(MF, Alpha::R26, getRegClassFor(MVT::i64));
for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I)
{
SDOperand argt;
if (count < 6) {
unsigned Vreg;
MVT::ValueType VT = getValueType(I->getType());
switch (VT) {
default:
std::cerr << "Unknown Type " << VT << "\n";
abort();
case MVT::f64:
case MVT::f32:
args_float[count] = AddLiveIn(MF, args_float[count], getRegClassFor(VT));
argt = DAG.getCopyFromReg(DAG.getRoot(), args_float[count], VT);
DAG.setRoot(argt.getValue(1));
break;
case MVT::i1:
case MVT::i8:
case MVT::i16:
case MVT::i32:
case MVT::i64:
args_int[count] = AddLiveIn(MF, args_int[count], getRegClassFor(MVT::i64));
argt = DAG.getCopyFromReg(DAG.getRoot(), args_int[count], MVT::i64);
DAG.setRoot(argt.getValue(1));
if (VT != MVT::i64) {
unsigned AssertOp =
I->getType()->isSigned() ? ISD::AssertSext : ISD::AssertZext;
argt = DAG.getNode(AssertOp, MVT::i64, argt,
DAG.getValueType(VT));
argt = DAG.getNode(ISD::TRUNCATE, VT, argt);
}
break;
}
} else { //more args
// Create the frame index object for this incoming parameter...
int FI = MFI->CreateFixedObject(8, 8 * (count - 6));
// Create the SelectionDAG nodes corresponding to a load
//from this parameter
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i64);
argt = DAG.getLoad(getValueType(I->getType()),
DAG.getEntryNode(), FIN, DAG.getSrcValue(NULL));
}
++count;
ArgValues.push_back(argt);
}
// If the functions takes variable number of arguments, copy all regs to stack
if (F.isVarArg()) {
VarArgsOffset = count * 8;
std::vector<SDOperand> LS;
for (int i = 0; i < 6; ++i) {
if (MRegisterInfo::isPhysicalRegister(args_int[i]))
args_int[i] = AddLiveIn(MF, args_int[i], getRegClassFor(MVT::i64));
SDOperand argt = DAG.getCopyFromReg(DAG.getRoot(), args_int[i], MVT::i64);
int FI = MFI->CreateFixedObject(8, -8 * (6 - i));
if (i == 0) VarArgsBase = FI;
SDOperand SDFI = DAG.getFrameIndex(FI, MVT::i64);
LS.push_back(DAG.getNode(ISD::STORE, MVT::Other, DAG.getRoot(), argt,
SDFI, DAG.getSrcValue(NULL)));
if (MRegisterInfo::isPhysicalRegister(args_float[i]))
args_float[i] = AddLiveIn(MF, args_float[i], getRegClassFor(MVT::f64));
argt = DAG.getCopyFromReg(DAG.getRoot(), args_float[i], MVT::f64);
FI = MFI->CreateFixedObject(8, - 8 * (12 - i));
SDFI = DAG.getFrameIndex(FI, MVT::i64);
LS.push_back(DAG.getNode(ISD::STORE, MVT::Other, DAG.getRoot(), argt,
SDFI, DAG.getSrcValue(NULL)));
}
//Set up a token factor with all the stack traffic
DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, LS));
}
// Finally, inform the code generator which regs we return values in.
switch (getValueType(F.getReturnType())) {
default: assert(0 && "Unknown type!");
case MVT::isVoid: break;
case MVT::i1:
case MVT::i8:
case MVT::i16:
case MVT::i32:
case MVT::i64:
MF.addLiveOut(Alpha::R0);
break;
case MVT::f32:
case MVT::f64:
MF.addLiveOut(Alpha::F0);
break;
}
//return the arguments
return ArgValues;
}
std::pair<SDOperand, SDOperand>
AlphaTargetLowering::LowerCallTo(SDOperand Chain,
const Type *RetTy, bool isVarArg,
unsigned CallingConv, bool isTailCall,
SDOperand Callee, ArgListTy &Args,
SelectionDAG &DAG) {
int NumBytes = 0;
if (Args.size() > 6)
NumBytes = (Args.size() - 6) * 8;
Chain = DAG.getCALLSEQ_START(Chain,
DAG.getConstant(NumBytes, getPointerTy()));
std::vector<SDOperand> args_to_use;
for (unsigned i = 0, e = Args.size(); i != e; ++i)
{
switch (getValueType(Args[i].second)) {
default: assert(0 && "Unexpected ValueType for argument!");
case MVT::i1:
case MVT::i8:
case MVT::i16:
case MVT::i32:
// Promote the integer to 64 bits. If the input type is signed use a
// sign extend, otherwise use a zero extend.
if (Args[i].second->isSigned())
Args[i].first = DAG.getNode(ISD::SIGN_EXTEND, MVT::i64, Args[i].first);
else
Args[i].first = DAG.getNode(ISD::ZERO_EXTEND, MVT::i64, Args[i].first);
break;
case MVT::i64:
case MVT::f64:
case MVT::f32:
break;
}
args_to_use.push_back(Args[i].first);
}
std::vector<MVT::ValueType> RetVals;
MVT::ValueType RetTyVT = getValueType(RetTy);
MVT::ValueType ActualRetTyVT = RetTyVT;
if (RetTyVT >= MVT::i1 && RetTyVT <= MVT::i32)
ActualRetTyVT = MVT::i64;
if (RetTyVT != MVT::isVoid)
RetVals.push_back(ActualRetTyVT);
RetVals.push_back(MVT::Other);
std::vector<SDOperand> Ops;
Ops.push_back(Chain);
Ops.push_back(Callee);
Ops.insert(Ops.end(), args_to_use.begin(), args_to_use.end());
SDOperand TheCall = DAG.getNode(AlphaISD::CALL, RetVals, Ops);
Chain = TheCall.getValue(RetTyVT != MVT::isVoid);
Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, Chain,
DAG.getConstant(NumBytes, getPointerTy()));
SDOperand RetVal = TheCall;
if (RetTyVT != ActualRetTyVT) {
RetVal = DAG.getNode(RetTy->isSigned() ? ISD::AssertSext : ISD::AssertZext,
MVT::i64, RetVal, DAG.getValueType(RetTyVT));
RetVal = DAG.getNode(ISD::TRUNCATE, RetTyVT, RetVal);
}
return std::make_pair(RetVal, Chain);
}
void AlphaTargetLowering::restoreGP(MachineBasicBlock* BB)
{
BuildMI(BB, Alpha::BIS, 2, Alpha::R29).addReg(GP).addReg(GP);
}
void AlphaTargetLowering::restoreRA(MachineBasicBlock* BB)
{
BuildMI(BB, Alpha::BIS, 2, Alpha::R26).addReg(RA).addReg(RA);
}
static void getValueInfo(const Value* v, int& type, int& fun, int& offset)
{
fun = type = offset = 0;
if (v == NULL) {
type = 0;
} else if (const GlobalValue* GV = dyn_cast<GlobalValue>(v)) {
type = 1;
const Module* M = GV->getParent();
for(Module::const_global_iterator ii = M->global_begin(); &*ii != GV; ++ii)
++offset;
} else if (const Argument* Arg = dyn_cast<Argument>(v)) {
type = 2;
const Function* F = Arg->getParent();
const Module* M = F->getParent();
for(Module::const_iterator ii = M->begin(); &*ii != F; ++ii)
++fun;
for(Function::const_arg_iterator ii = F->arg_begin(); &*ii != Arg; ++ii)
++offset;
} else if (const Instruction* I = dyn_cast<Instruction>(v)) {
assert(dyn_cast<PointerType>(I->getType()));
type = 3;
const BasicBlock* bb = I->getParent();
const Function* F = bb->getParent();
const Module* M = F->getParent();
for(Module::const_iterator ii = M->begin(); &*ii != F; ++ii)
++fun;
for(Function::const_iterator ii = F->begin(); &*ii != bb; ++ii)
offset += ii->size();
for(BasicBlock::const_iterator ii = bb->begin(); &*ii != I; ++ii)
++offset;
} else if (const Constant* C = dyn_cast<Constant>(v)) {
//Don't know how to look these up yet
type = 0;
} else {
assert(0 && "Error in value marking");
}
//type = 4: register spilling
//type = 5: global address loading or constant loading
}
static int getUID()
{
static int id = 0;
return ++id;
}
/// LowerOperation - Provide custom lowering hooks for some operations.
///
SDOperand AlphaTargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
switch (Op.getOpcode()) {
default: assert(0 && "Wasn't expecting to be able to lower this!");
case ISD::SINT_TO_FP: {
assert(MVT::i64 == Op.getOperand(0).getValueType() &&
"Unhandled SINT_TO_FP type in custom expander!");
SDOperand LD;
bool isDouble = MVT::f64 == Op.getValueType();
if (useITOF) {
LD = DAG.getNode(AlphaISD::ITOFT_, MVT::f64, Op.getOperand(0));
} else {
int FrameIdx =
DAG.getMachineFunction().getFrameInfo()->CreateStackObject(8, 8);
SDOperand FI = DAG.getFrameIndex(FrameIdx, MVT::i64);
SDOperand ST = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
Op.getOperand(0), FI, DAG.getSrcValue(0));
LD = DAG.getLoad(MVT::f64, ST, FI, DAG.getSrcValue(0));
}
SDOperand FP = DAG.getNode(isDouble?AlphaISD::CVTQT_:AlphaISD::CVTQS_,
isDouble?MVT::f64:MVT::f32, LD);
return FP;
}
case ISD::FP_TO_SINT: {
bool isDouble = MVT::f64 == Op.getOperand(0).getValueType();
SDOperand src = Op.getOperand(0);
if (!isDouble) //Promote
src = DAG.getNode(ISD::FP_EXTEND, MVT::f64, src);
src = DAG.getNode(AlphaISD::CVTTQ_, MVT::f64, src);
if (useITOF) {
return DAG.getNode(AlphaISD::FTOIT_, MVT::i64, src);
} else {
int FrameIdx =
DAG.getMachineFunction().getFrameInfo()->CreateStackObject(8, 8);
SDOperand FI = DAG.getFrameIndex(FrameIdx, MVT::i64);
SDOperand ST = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
src, FI, DAG.getSrcValue(0));
return DAG.getLoad(MVT::i64, ST, FI, DAG.getSrcValue(0));
}
}
case ISD::ConstantPool: {
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
Constant *C = CP->get();
SDOperand CPI = DAG.getTargetConstantPool(C, MVT::i64, CP->getAlignment());
SDOperand Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, CPI,
DAG.getNode(AlphaISD::GlobalBaseReg, MVT::i64));
SDOperand Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, CPI, Hi);
return Lo;
}
case ISD::GlobalAddress: {
GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
GlobalValue *GV = GSDN->getGlobal();
SDOperand GA = DAG.getTargetGlobalAddress(GV, MVT::i64, GSDN->getOffset());
if (!GV->hasWeakLinkage() && !GV->isExternal()) {
SDOperand Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, GA,
DAG.getNode(AlphaISD::GlobalBaseReg, MVT::i64));
SDOperand Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, GA, Hi);
return Lo;
} else
return DAG.getNode(AlphaISD::RelLit, MVT::i64, GA, DAG.getNode(AlphaISD::GlobalBaseReg, MVT::i64));
}
case ISD::ExternalSymbol: {
return DAG.getNode(AlphaISD::RelLit, MVT::i64,
DAG.getTargetExternalSymbol(cast<ExternalSymbolSDNode>(Op)->getSymbol(), MVT::i64),
DAG.getNode(AlphaISD::GlobalBaseReg, MVT::i64));
}
case ISD::SDIV:
case ISD::UDIV:
case ISD::UREM:
case ISD::SREM:
if (MVT::isInteger(Op.getValueType())) {
const char* opstr = 0;
switch(Op.getOpcode()) {
case ISD::UREM: opstr = "__remqu"; break;
case ISD::SREM: opstr = "__remq"; break;
case ISD::UDIV: opstr = "__divqu"; break;
case ISD::SDIV: opstr = "__divq"; break;
}
SDOperand Tmp1 = Op.getOperand(0),
Tmp2 = Op.getOperand(1),
Addr = DAG.getExternalSymbol(opstr, MVT::i64);
return DAG.getNode(AlphaISD::DivCall, MVT::i64, Addr, Tmp1, Tmp2);
}
break;
case ISD::LOAD:
case ISD::SEXTLOAD:
case ISD::ZEXTLOAD:
case ISD::EXTLOAD:
{
SDOperand Chain = Op.getOperand(0);
SDOperand Address = Op.getOperand(1);
unsigned Opc;
unsigned opcode = Op.getOpcode();
if (opcode == ISD::LOAD)
switch (Op.Val->getValueType(0)) {
default: Op.Val->dump(); assert(0 && "Bad load!");
case MVT::i64: Opc = AlphaISD::LDQ_; break;
case MVT::f64: Opc = AlphaISD::LDT_; break;
case MVT::f32: Opc = AlphaISD::LDS_; break;
}
else
switch (cast<VTSDNode>(Op.getOperand(3))->getVT()) {
default: Op.Val->dump(); assert(0 && "Bad sign extend!");
case MVT::i32: Opc = AlphaISD::LDL_;
assert(opcode != ISD::ZEXTLOAD && "Not sext"); break;
case MVT::i16: Opc = AlphaISD::LDWU_;
assert(opcode != ISD::SEXTLOAD && "Not zext"); break;
case MVT::i1: //FIXME: Treat i1 as i8 since there are problems otherwise
case MVT::i8: Opc = AlphaISD::LDBU_;
assert(opcode != ISD::SEXTLOAD && "Not zext"); break;
}
int i, j, k;
getValueInfo(dyn_cast<SrcValueSDNode>(Op.getOperand(2))->getValue(), i, j, k);
SDOperand Zero = DAG.getConstant(0, MVT::i64);
std::vector<MVT::ValueType> VTS;
VTS.push_back(Op.Val->getValueType(0));
VTS.push_back(MVT::Other);
std::vector<SDOperand> ARGS;
ARGS.push_back(Chain);
ARGS.push_back(Zero);
ARGS.push_back(Address);
ARGS.push_back(DAG.getConstant(i, MVT::i64));
ARGS.push_back(DAG.getConstant(j, MVT::i64));
ARGS.push_back(DAG.getConstant(k, MVT::i64));
ARGS.push_back(DAG.getConstant(getUID(), MVT::i64));
return DAG.getNode(Opc, VTS, ARGS);
}
case ISD::TRUNCSTORE:
case ISD::STORE:
{
SDOperand Chain = Op.getOperand(0);
SDOperand Value = Op.getOperand(1);
SDOperand Address = Op.getOperand(2);
unsigned Opc;
unsigned opcode = Op.getOpcode();
if (opcode == ISD::STORE) {
switch(Value.getValueType()) {
default: assert(0 && "unknown Type in store");
case MVT::i64: Opc = AlphaISD::STQ_; break;
case MVT::f64: Opc = AlphaISD::STT_; break;
case MVT::f32: Opc = AlphaISD::STS_; break;
}
} else { //ISD::TRUNCSTORE
switch(cast<VTSDNode>(Op.getOperand(4))->getVT()) {
default: assert(0 && "unknown Type in store");
case MVT::i8: Opc = AlphaISD::STB_; break;
case MVT::i16: Opc = AlphaISD::STW_; break;
case MVT::i32: Opc = AlphaISD::STL_; break;
}
}
int i, j, k;
getValueInfo(cast<SrcValueSDNode>(Op.getOperand(3))->getValue(), i, j, k);
SDOperand Zero = DAG.getConstant(0, MVT::i64);
std::vector<MVT::ValueType> VTS;
VTS.push_back(MVT::Other);
std::vector<SDOperand> ARGS;
ARGS.push_back(Chain);
ARGS.push_back(Value);
ARGS.push_back(Zero);
ARGS.push_back(Address);
ARGS.push_back(DAG.getConstant(i, MVT::i64));
ARGS.push_back(DAG.getConstant(j, MVT::i64));
ARGS.push_back(DAG.getConstant(k, MVT::i64));
ARGS.push_back(DAG.getConstant(getUID(), MVT::i64));
return DAG.getNode(Opc, VTS, ARGS);
}
case ISD::VAARG: {
SDOperand Chain = Op.getOperand(0);
SDOperand VAListP = Op.getOperand(1);
SDOperand VAListS = Op.getOperand(2);
SDOperand Base = DAG.getLoad(MVT::i64, Chain, VAListP, VAListS);
SDOperand Tmp = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
DAG.getConstant(8, MVT::i64));
SDOperand Offset = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Base.getValue(1),
Tmp, DAG.getSrcValue(0), MVT::i32);
SDOperand DataPtr = DAG.getNode(ISD::ADD, MVT::i64, Base, Offset);
if (MVT::isFloatingPoint(Op.getValueType()))
{
//if fp && Offset < 6*8, then subtract 6*8 from DataPtr
SDOperand FPDataPtr = DAG.getNode(ISD::SUB, MVT::i64, DataPtr,
DAG.getConstant(8*6, MVT::i64));
SDOperand CC = DAG.getSetCC(MVT::i64, Offset,
DAG.getConstant(8*6, MVT::i64), ISD::SETLT);
DataPtr = DAG.getNode(ISD::SELECT, MVT::i64, CC, FPDataPtr, DataPtr);
}
SDOperand NewOffset = DAG.getNode(ISD::ADD, MVT::i64, Offset,
DAG.getConstant(8, MVT::i64));
SDOperand Update = DAG.getNode(ISD::TRUNCSTORE, MVT::Other,
Offset.getValue(1), NewOffset,
Tmp, DAG.getSrcValue(0),
DAG.getValueType(MVT::i32));
SDOperand Result;
if (Op.getValueType() == MVT::i32)
Result = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Update, DataPtr,
DAG.getSrcValue(0), MVT::i32);
else
Result = DAG.getLoad(Op.getValueType(), Update, DataPtr,
DAG.getSrcValue(0));
return Result;
}
case ISD::VACOPY: {
SDOperand Chain = Op.getOperand(0);
SDOperand DestP = Op.getOperand(1);
SDOperand SrcP = Op.getOperand(2);
SDOperand DestS = Op.getOperand(3);
SDOperand SrcS = Op.getOperand(4);
SDOperand Val = DAG.getLoad(getPointerTy(), Chain, SrcP, SrcS);
SDOperand Result = DAG.getNode(ISD::STORE, MVT::Other, Val.getValue(1), Val,
DestP, DestS);
SDOperand NP = DAG.getNode(ISD::ADD, MVT::i64, SrcP,
DAG.getConstant(8, MVT::i64));
Val = DAG.getExtLoad(ISD::SEXTLOAD, MVT::i64, Result, NP,
DAG.getSrcValue(0), MVT::i32);
SDOperand NPD = DAG.getNode(ISD::ADD, MVT::i64, DestP,
DAG.getConstant(8, MVT::i64));
return DAG.getNode(ISD::TRUNCSTORE, MVT::Other, Val.getValue(1),
Val, NPD, DAG.getSrcValue(0),DAG.getValueType(MVT::i32));
}
case ISD::VASTART: {
SDOperand Chain = Op.getOperand(0);
SDOperand VAListP = Op.getOperand(1);
SDOperand VAListS = Op.getOperand(2);
// vastart stores the address of the VarArgsBase and VarArgsOffset
SDOperand FR = DAG.getFrameIndex(VarArgsBase, MVT::i64);
SDOperand S1 = DAG.getNode(ISD::STORE, MVT::Other, Chain, FR, VAListP,
VAListS);
SDOperand SA2 = DAG.getNode(ISD::ADD, MVT::i64, VAListP,
DAG.getConstant(8, MVT::i64));
return DAG.getNode(ISD::TRUNCSTORE, MVT::Other, S1,
DAG.getConstant(VarArgsOffset, MVT::i64), SA2,
DAG.getSrcValue(0), DAG.getValueType(MVT::i32));
}
}
return SDOperand();
}
SDOperand AlphaTargetLowering::CustomPromoteOperation(SDOperand Op,
SelectionDAG &DAG) {
assert(Op.getValueType() == MVT::i32 &&
Op.getOpcode() == ISD::VAARG &&
"Unknown node to custom promote!");
// The code in LowerOperation already handles i32 vaarg
return LowerOperation(Op, DAG);
}