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several major improvements to the sparc backend: support for weak linkage

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and PIC codegen.  Patch by Venkatraman Govindaraju!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81877 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-09-15 17:46:24 +00:00
parent 307a7c48f1
commit db486a6d53
10 changed files with 212 additions and 48 deletions
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35
lib/Target/Sparc/SparcISelLowering.cpp
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@ -740,17 +740,29 @@ static void LookThroughSetCC(SDValue &LHS, SDValue &RHS,
}
}
static SDValue LowerGLOBALADDRESS(SDValue Op, SelectionDAG &DAG) {
SDValue SparcTargetLowering::LowerGlobalAddress(SDValue Op,
SelectionDAG &DAG) {
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
// FIXME there isn't really any debug info here
DebugLoc dl = Op.getDebugLoc();
SDValue GA = DAG.getTargetGlobalAddress(GV, MVT::i32);
SDValue Hi = DAG.getNode(SPISD::Hi, dl, MVT::i32, GA);
SDValue Lo = DAG.getNode(SPISD::Lo, dl, MVT::i32, GA);
return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
SDValue GlobalBase = DAG.getNode(SPISD::GLOBAL_BASE_REG, dl,
getPointerTy());
SDValue RelAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
SDValue AbsAddr = DAG.getNode(ISD::ADD, dl, MVT::i32,
GlobalBase, RelAddr);
return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
AbsAddr, NULL, 0);
}
static SDValue LowerCONSTANTPOOL(SDValue Op, SelectionDAG &DAG) {
SDValue SparcTargetLowering::LowerConstantPool(SDValue Op,
SelectionDAG &DAG) {
ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
// FIXME there isn't really any debug info here
DebugLoc dl = Op.getDebugLoc();
@ -758,7 +770,16 @@ static SDValue LowerCONSTANTPOOL(SDValue Op, SelectionDAG &DAG) {
SDValue CP = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment());
SDValue Hi = DAG.getNode(SPISD::Hi, dl, MVT::i32, CP);
SDValue Lo = DAG.getNode(SPISD::Lo, dl, MVT::i32, CP);
return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
SDValue GlobalBase = DAG.getNode(SPISD::GLOBAL_BASE_REG, dl,
getPointerTy());
SDValue RelAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
SDValue AbsAddr = DAG.getNode(ISD::ADD, dl, MVT::i32,
GlobalBase, RelAddr);
return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
AbsAddr, NULL, 0);
}
static SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) {
@ -912,8 +933,8 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) {
case ISD::FRAMEADDR: return SDValue();
case ISD::GlobalTLSAddress:
llvm_unreachable("TLS not implemented for Sparc.");
case ISD::GlobalAddress: return LowerGLOBALADDRESS(Op, DAG);
case ISD::ConstantPool: return LowerCONSTANTPOOL(Op, DAG);
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
case ISD::BR_CC: return LowerBR_CC(Op, DAG);
@ -1054,5 +1075,5 @@ SparcTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
/// getFunctionAlignment - Return the Log2 alignment of this function.
unsigned SparcTargetLowering::getFunctionAlignment(const Function *) const {
return 4;
return 2;
}