6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-15 20:06:46 +00:00
Code Issues Projects Releases Wiki Activity

Add lowering for global address nodes. Not pretty efficient though.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70730 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2009-05-03 13:08:33 +00:00
parent 3c2684d136
commit 3513ca81c6
3 changed files with 27 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
lib/Target/MSP430/MSP430ISelLowering.cpp
View File

@ -65,6 +65,7 @@ MSP430TargetLowering::MSP430TargetLowering(MSP430TargetMachine &tm) :
setOperationAction(ISD::SRA, MVT::i16, Custom);
setOperationAction(ISD::RET, MVT::Other, Custom);
setOperationAction(ISD::GlobalAddress, MVT::i16, Custom);
}
SDValue MSP430TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
@ -73,6 +74,7 @@ SDValue MSP430TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
case ISD::SRA: return LowerShifts(Op, DAG);
case ISD::RET: return LowerRET(Op, DAG);
case ISD::CALL: return LowerCALL(Op, DAG);
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
default:
assert(0 && "unimplemented operand");
return SDValue();
@ -421,11 +423,22 @@ SDValue MSP430TargetLowering::LowerShifts(SDValue Op,
return Victim;
}
SDValue MSP430TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) {
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
// Create the TargetGlobalAddress node, folding in the constant offset.
SDValue Result = DAG.getTargetGlobalAddress(GV, getPointerTy(), Offset);
return DAG.getNode(MSP430ISD::Wrapper, Op.getDebugLoc(),
getPointerTy(), Result);
}
const char *MSP430TargetLowering::getTargetNodeName(unsigned Opcode) const {
switch (Opcode) {
default: return NULL;
case MSP430ISD::RET_FLAG: return "MSP430ISD::RET_FLAG";
case MSP430ISD::RRA: return "MSP430ISD::RRA";
case MSP430ISD::CALL: return "MSP430ISD::CALL";
case MSP430ISD::Wrapper: return "MSP430ISD::Wrapper";
}
}

7
lib/Target/MSP430/MSP430ISelLowering.h
View File

@ -32,7 +32,11 @@ namespace llvm {
/// CALL/TAILCALL - These operations represent an abstract call
/// instruction, which includes a bunch of information.
CALL
CALL,
/// Wrapper - A wrapper node for TargetConstantPool, TargetExternalSymbol,
/// and TargetGlobalAddress.
Wrapper
};
}
@ -55,6 +59,7 @@ namespace llvm {
SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
SDValue LowerCCCArguments(SDValue Op, SelectionDAG &DAG);
SDValue LowerShifts(SDValue Op, SelectionDAG &DAG);
SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
SDValue LowerCCCCallTo(SDValue Op, SelectionDAG &DAG,
unsigned CC);

8
lib/Target/MSP430/MSP430InstrInfo.td
View File

@ -25,6 +25,7 @@ class SDTCisI16<int OpNum> : SDTCisVT<OpNum, i16>;
def SDT_MSP430Call : SDTypeProfile<0, -1, [SDTCisVT<0, iPTR>]>;
def SDT_MSP430CallSeqStart : SDCallSeqStart<[SDTCisVT<0, i16>]>;
def SDT_MSP430CallSeqEnd : SDCallSeqEnd<[SDTCisVT<0, i16>, SDTCisVT<1, i16>]>;
def SDT_MSP430Wrapper : SDTypeProfile<1, 1, [SDTCisSameAs<0, 1>, SDTCisPtrTy<0>]>;
//===----------------------------------------------------------------------===//
// MSP430 Specific Node Definitions.
@ -42,6 +43,7 @@ def MSP430callseq_start :
def MSP430callseq_end :
SDNode<"ISD::CALLSEQ_END", SDT_MSP430CallSeqEnd,
[SDNPHasChain, SDNPOptInFlag, SDNPOutFlag]>;
def MSP430Wrapper : SDNode<"MSP430ISD::Wrapper", SDT_MSP430Wrapper>;
//===----------------------------------------------------------------------===//
// MSP430 Operand Definitions.
@ -611,6 +613,12 @@ def : Pat<(extloadi16i8 addr:$src), (MOVZX16rm8 addr:$src)>;
def : Pat<(i8 (trunc GR16:$src)),
(EXTRACT_SUBREG GR16:$src, subreg_8bit)>;
// GlobalAddress
def : Pat<(i16 (MSP430Wrapper tglobaladdr :$dst)), (MOV16ri tglobaladdr :$dst)>;
def : Pat<(add GR16:$src1, (MSP430Wrapper tglobaladdr :$src2)),
(ADD16ri GR16:$src1, tglobaladdr:$src2)>;
// calls
def : Pat<(MSP430call (i16 tglobaladdr:$dst)),
(CALLi tglobaladdr:$dst)>;