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Make the function begin label start after ther data pointer. 

The address of data frame for function can be obtained by subtracting 2 from the function begin label.

llvm-svn: 69801
This commit is contained in:
Sanjiv Gupta 2009-04-22 12:02:36 +00:00
parent 202f3dc5b3
commit 107b2818ce
3 changed files with 12 additions and 9 deletions
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2
llvm/lib/Target/PIC16/PIC16AsmPrinter.cpp
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@ -116,9 +116,9 @@ bool PIC16AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
SwitchToSection (fCodeSection);
// Emit the frame address of the function at the beginning of code.
O << CurrentFnName << ":\n";
O << " retlw low(" << FunctionLabelBegin<< CurrentFnName << ".frame)\n";
O << " retlw high(" << FunctionLabelBegin<< CurrentFnName << ".frame)\n";
O << CurrentFnName << ":\n";
// Print out code for the function.

16
llvm/lib/Target/PIC16/PIC16ISelLowering.cpp
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@ -1155,10 +1155,12 @@ GetDataAddress(DebugLoc dl, SDValue Callee, SDValue &Chain,
SDValue Lo = Callee.getOperand(0);
SDValue Hi = Callee.getOperand(1);
SDValue Data_Lo, Data_Hi;
SDVTList Tys = DAG.getVTList(MVT::i8, MVT::Other, MVT::Flag);
Hi = DAG.getNode(PIC16ISD::MTPCLATH, dl, MVT::i8, Hi);
// Use the Lo part as is and make CALLW
Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Lo, Hi);
// Subtract 2 from Lo to get the Lower part of DataAddress.
Data_Lo = DAG.getNode(ISD::SUB, dl, MVT::i8, Lo, DAG.getConstant(2, MVT::i8));
Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Data_Lo, Hi);
SDValue Call = DAG.getNode(PIC16ISD::CALLW, dl, Tys, Chain, Callee,
OperFlag);
Chain = getChain(Call);
@ -1176,10 +1178,10 @@ GetDataAddress(DebugLoc dl, SDValue Callee, SDValue &Chain,
Chain = getChain(SeqStart);
OperFlag = getOutFlag(SeqStart); // To manage the data dependency
// Add 1 to Lo part for the second code word.
Lo = DAG.getNode(ISD::ADD, dl, MVT::i8, Lo, DAG.getConstant(1, MVT::i8));
// Subtract 1 to Lo part for the second code word.
Data_Lo = DAG.getNode(ISD::SUB, dl, MVT::i8, Lo, DAG.getConstant(1, MVT::i8));
// Use new Lo to make another CALLW
Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Lo, Hi);
Callee = DAG.getNode(PIC16ISD::PIC16Connect, dl, MVT::i8, Data_Lo, Hi);
Call = DAG.getNode(PIC16ISD::CALLW, dl, Tys, Chain, Callee, OperFlag);
Chain = getChain(Call);
OperFlag = getOutFlag(Call);
@ -1266,8 +1268,8 @@ SDValue PIC16TargetLowering::LowerCALL(SDValue Op, SelectionDAG &DAG) {
SDValue CodeAddr_Lo = Callee.getOperand(0);
SDValue CodeAddr_Hi = Callee.getOperand(1);
CodeAddr_Lo = DAG.getNode(ISD::ADD, dl, MVT::i8, CodeAddr_Lo,
DAG.getConstant(2, MVT::i8));
/*CodeAddr_Lo = DAG.getNode(ISD::ADD, dl, MVT::i8, CodeAddr_Lo,
DAG.getConstant(2, MVT::i8));*/
// move Hi part in PCLATH
CodeAddr_Hi = DAG.getNode(PIC16ISD::MTPCLATH, dl, MVT::i8, CodeAddr_Hi);

3
llvm/lib/Target/PIC16/PIC16InstrInfo.td
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@ -428,7 +428,8 @@ def sublw_cc : SUBLW<0, PIC16Subcc>;
let isCall = 1,
Defs = [W, FSR0, FSR1] in {
def CALL: LiteralFormat<0x1, (outs), (ins i8imm:$func),
"call ${func} + 2",
//"call ${func} + 2",
"call ${func}",
[(PIC16call diraddr:$func)]>;
}