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Let the alpha breakage begin. First Formals and RET. next Calls

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28753 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Lenharth 2006-06-12 18:09:24 +00:00
parent 232c910b8a
commit f2b806a1aa
5 changed files with 102 additions and 72 deletions
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141
lib/Target/Alpha/AlphaISelLowering.cpp
View File

@ -128,6 +128,8 @@ AlphaTargetLowering::AlphaTargetLowering(TargetMachine &TM) : TargetLowering(TM)
setOperationAction(ISD::VAARG, MVT::Other, Custom);
setOperationAction(ISD::VAARG, MVT::i32, Custom);
setOperationAction(ISD::RET, MVT::Other, Custom);
setStackPointerRegisterToSaveRestore(Alpha::R30);
setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
@ -154,6 +156,7 @@ const char *AlphaTargetLowering::getTargetNodeName(unsigned Opcode) const {
case AlphaISD::GlobalBaseReg: return "Alpha::GlobalBaseReg";
case AlphaISD::CALL: return "Alpha::CALL";
case AlphaISD::DivCall: return "Alpha::DivCall";
case AlphaISD::RET_FLAG: return "Alpha::RET_FLAG";
}
}
@ -175,116 +178,121 @@ const char *AlphaTargetLowering::getTargetNodeName(unsigned Opcode) const {
// //#define GP $29
// //#define SP $30
std::vector<SDOperand>
AlphaTargetLowering::LowerArguments(Function &F, SelectionDAG &DAG)
{
static SDOperand LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG,
int &VarArgsBase,
int &VarArgsOffset,
unsigned int &GP,
unsigned int &RA) {
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
SSARegMap *RegMap = MF.getSSARegMap();
std::vector<SDOperand> ArgValues;
SDOperand Root = Op.getOperand(0);
GP = AddLiveIn(MF, Alpha::R29, &Alpha::GPRCRegClass);
RA = AddLiveIn(MF, Alpha::R26, &Alpha::GPRCRegClass);
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)
{
for (unsigned ArgNo = 0, e = Op.Val->getNumValues()-1; ArgNo != e; ++ArgNo) {
SDOperand argt;
if (count < 6) {
MVT::ValueType ObjectVT = Op.getValue(ArgNo).getValueType();
SDOperand ArgVal;
if (ArgNo < 6) {
unsigned Vreg;
MVT::ValueType VT = getValueType(I->getType());
switch (VT) {
switch (ObjectVT) {
default:
std::cerr << "Unknown Type " << VT << "\n";
std::cerr << "Unknown Type " << ObjectVT << "\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));
args_float[ArgNo] = AddLiveIn(MF, args_float[ArgNo],
&Alpha::F8RCRegClass);
ArgVal = DAG.getCopyFromReg(Root, args_float[ArgNo], ObjectVT);
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);
}
args_int[ArgNo] = AddLiveIn(MF, args_int[ArgNo],
&Alpha::GPRCRegClass);
ArgVal = DAG.getCopyFromReg(Root, args_int[ArgNo], MVT::i64);
break;
}
} else { //more args
// Create the frame index object for this incoming parameter...
int FI = MFI->CreateFixedObject(8, 8 * (count - 6));
int FI = MFI->CreateFixedObject(8, 8 * (ArgNo - 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));
ArgVal = DAG.getLoad(ObjectVT, Root, FIN, DAG.getSrcValue(NULL));
}
++count;
ArgValues.push_back(argt);
ArgValues.push_back(ArgVal);
}
// If the functions takes variable number of arguments, copy all regs to stack
if (F.isVarArg()) {
VarArgsOffset = count * 8;
bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
if (isVarArg) {
VarArgsOffset = (Op.Val->getNumValues()-1) * 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);
args_int[i] = AddLiveIn(MF, args_int[i], &Alpha::GPRCRegClass);
SDOperand argt = DAG.getCopyFromReg(Root, 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,
LS.push_back(DAG.getNode(ISD::STORE, MVT::Other, Root, 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);
args_float[i] = AddLiveIn(MF, args_float[i], &Alpha::F8RCRegClass);
argt = DAG.getCopyFromReg(Root, 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,
LS.push_back(DAG.getNode(ISD::STORE, MVT::Other, Root, argt,
SDFI, DAG.getSrcValue(NULL)));
}
//Set up a token factor with all the stack traffic
DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, LS));
Root = 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);
ArgValues.push_back(Root);
// Return the new list of results.
std::vector<MVT::ValueType> RetVT(Op.Val->value_begin(),
Op.Val->value_end());
return DAG.getNode(ISD::MERGE_VALUES, RetVT, ArgValues);
}
static SDOperand LowerRET(SDOperand Op, SelectionDAG &DAG) {
SDOperand Copy;
switch (Op.getNumOperands()) {
default:
assert(0 && "Do not know how to return this many arguments!");
abort();
case 1:
return SDOperand(); // ret void is legal
case 3: {
MVT::ValueType ArgVT = Op.getOperand(1).getValueType();
unsigned ArgReg;
if (MVT::isInteger(ArgVT))
ArgReg = Alpha::R0;
else {
assert(MVT::isFloatingPoint(ArgVT));
ArgReg = Alpha::F0;
}
Copy = DAG.getCopyToReg(Op.getOperand(0), ArgReg, Op.getOperand(1),
SDOperand());
if(DAG.getMachineFunction().liveout_empty())
DAG.getMachineFunction().addLiveOut(ArgReg);
break;
}
//return the arguments+
return ArgValues;
}
return DAG.getNode(AlphaISD::RET_FLAG, MVT::Other, Copy, Copy.getValue(1));
}
std::pair<SDOperand, SDOperand>
@ -371,7 +379,12 @@ static int getUID()
///
SDOperand AlphaTargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
switch (Op.getOpcode()) {
default: assert(0 && "Wasn't expecting to be able to lower this!");
default: assert(0 && "Wasn't expecting to be able to lower this!");
case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG,
VarArgsBase,
VarArgsOffset,
GP, RA);
case ISD::RET: return LowerRET(Op,DAG);
case ISD::SINT_TO_FP: {
assert(MVT::i64 == Op.getOperand(0).getValueType() &&
"Unhandled SINT_TO_FP type in custom expander!");

10
lib/Target/Alpha/AlphaISelLowering.h
View File

@ -42,7 +42,10 @@ namespace llvm {
CALL,
/// DIVCALL - used for special library calls for div and rem
DivCall
DivCall,
/// return flag operand
RET_FLAG
};
}
@ -64,11 +67,6 @@ namespace llvm {
//Friendly names for dumps
const char *getTargetNodeName(unsigned Opcode) const;
/// LowerArguments - This hook must be implemented to indicate how we should
/// lower the arguments for the specified function, into the specified DAG.
virtual std::vector<SDOperand>
LowerArguments(Function &F, SelectionDAG &DAG);
/// LowerCallTo - This hook lowers an abstract call to a function into an
/// actual call.
virtual std::pair<SDOperand, SDOperand>

14
lib/Target/Alpha/AlphaInstrFormats.td
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@ -75,6 +75,20 @@ class MbrForm<bits<6> opcode, bits<2> TB, dag OL, string asmstr, InstrItinClass
let Inst{15-14} = TB;
let Inst{13-0} = disp;
}
class MbrpForm<bits<6> opcode, bits<2> TB, dag OL, string asmstr, list<dag> pattern, InstrItinClass itin>
: InstAlpha<opcode, asmstr, itin> {
let Pattern=pattern;
bits<5> Ra;
bits<5> Rb;
bits<14> disp;
let OperandList = OL;
let Inst{25-21} = Ra;
let Inst{20-16} = Rb;
let Inst{15-14} = TB;
let Inst{13-0} = disp;
}
//3.3.2
def target : Operand<OtherVT> {}

7
lib/Target/Alpha/AlphaInstrInfo.td
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@ -28,6 +28,9 @@ def Alpha_gprello : SDNode<"AlphaISD::GPRelLo", SDTIntBinOp, []>;
def Alpha_gprelhi : SDNode<"AlphaISD::GPRelHi", SDTIntBinOp, []>;
def Alpha_rellit : SDNode<"AlphaISD::RelLit", SDTIntBinOp, []>;
def retflag : SDNode<"AlphaISD::RET_FLAG", SDTRet,
[SDNPHasChain, SDNPOptInFlag]>;
// These are target-independent nodes, but have target-specific formats.
def SDT_AlphaCallSeq : SDTypeProfile<0, 1, [ SDTCisVT<0, i64> ]>;
def callseq_start : SDNode<"ISD::CALLSEQ_START", SDT_AlphaCallSeq,[SDNPHasChain]>;
@ -425,8 +428,10 @@ def : Pat<(setune GPRC:$X, GPRC:$Y), (CMPEQi (CMPEQ GPRC:$X, GPRC:$Y), 0)>;
def : Pat<(setune GPRC:$X, immUExt8:$Y), (CMPEQi (CMPEQ GPRC:$X, immUExt8:$Y), 0)>;
let isReturn = 1, isTerminator = 1, noResults = 1, Ra = 31, Rb = 26, disp = 1, Uses = [R26] in
let isReturn = 1, isTerminator = 1, noResults = 1, Ra = 31, Rb = 26, disp = 1, Uses = [R26] in {
def RETDAG : MbrForm< 0x1A, 0x02, (ops), "ret $$31,($$26),1", s_jsr>; //Return from subroutine
def RETDAGp : MbrpForm< 0x1A, 0x02, (ops), "ret $$31,($$26),1", [(retflag)], s_jsr>; //Return from subroutine
}
def JMP : MbrForm< 0x1A, 0x00, (ops GPRC:$RD, GPRC:$RS, GPRC:$DISP), "jmp $RD,($RS),$DISP", s_jsr>; //Jump
let isCall = 1, noResults = 1, Ra = 26,

2
lib/Target/Alpha/AlphaRegisterInfo.cpp
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@ -346,7 +346,7 @@ void AlphaRegisterInfo::emitEpilogue(MachineFunction &MF,
MachineBasicBlock &MBB) const {
const MachineFrameInfo *MFI = MF.getFrameInfo();
MachineBasicBlock::iterator MBBI = prior(MBB.end());
assert(MBBI->getOpcode() == Alpha::RETDAG
assert(MBBI->getOpcode() == Alpha::RETDAG || MBBI->getOpcode() == Alpha::RETDAGp
&& "Can only insert epilog into returning blocks");
bool FP = hasFP(MF);