// LowerOperation implementation
//===----------------------------------------------------------------------===//
+/// GetLabelAccessInfo - Return true if we should reference labels using a
+/// PICBase, set the HiOpFlags and LoOpFlags to the target MO flags.
+static bool GetLabelAccessInfo(const TargetMachine &TM, unsigned &HiOpFlags,
+ unsigned &LoOpFlags) {
+ // Don't use the pic base if not in PIC relocation model. Or if we are on a
+ // non-darwin platform. We don't support PIC on other platforms yet.
+ bool isPIC = TM.getRelocationModel() == Reloc::PIC_ &&
+ TM.getSubtarget<PPCSubtarget>().isDarwin();
+
+ HiOpFlags = isPIC ? PPCII::MO_HA16_PIC : PPCII::MO_HA16;
+ LoOpFlags = isPIC ? PPCII::MO_LO16_PIC : PPCII::MO_LO16;
+ return isPIC;
+}
+
+static SDValue LowerLabelRef(SDValue HiPart, SDValue LoPart, bool isPIC,
+ SelectionDAG &DAG) {
+ EVT PtrVT = HiPart.getValueType();
+ SDValue Zero = DAG.getConstant(0, PtrVT);
+ DebugLoc DL = HiPart.getDebugLoc();
+
+ SDValue Hi = DAG.getNode(PPCISD::Hi, DL, PtrVT, HiPart, Zero);
+ SDValue Lo = DAG.getNode(PPCISD::Lo, DL, PtrVT, LoPart, Zero);
+
+ // With PIC, the first instruction is actually "GR+hi(&G)".
+ if (isPIC)
+ Hi = DAG.getNode(ISD::ADD, DL, PtrVT,
+ DAG.getNode(PPCISD::GlobalBaseReg, DL, PtrVT), Hi);
+
+ // Generate non-pic code that has direct accesses to the constant pool.
+ // The address of the global is just (hi(&g)+lo(&g)).
+ return DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
+}
+
SDValue PPCTargetLowering::LowerConstantPool(SDValue Op,
SelectionDAG &DAG) const {
EVT PtrVT = Op.getValueType();
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
const Constant *C = CP->getConstVal();
- SDValue CPI = DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment());
- SDValue Zero = DAG.getConstant(0, PtrVT);
- // FIXME there isn't really any debug info here
- DebugLoc dl = Op.getDebugLoc();
-
- const TargetMachine &TM = DAG.getTarget();
-
- SDValue Hi = DAG.getNode(PPCISD::Hi, dl, PtrVT, CPI, Zero);
- SDValue Lo = DAG.getNode(PPCISD::Lo, dl, PtrVT, CPI, Zero);
-
- // If this is a non-darwin platform, we don't support non-static relo models
- // yet.
- if (TM.getRelocationModel() == Reloc::Static ||
- !TM.getSubtarget<PPCSubtarget>().isDarwin()) {
- // Generate non-pic code that has direct accesses to the constant pool.
- // The address of the global is just (hi(&g)+lo(&g)).
- return DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Lo);
- }
-
- if (TM.getRelocationModel() == Reloc::PIC_) {
- // With PIC, the first instruction is actually "GR+hi(&G)".
- Hi = DAG.getNode(ISD::ADD, dl, PtrVT,
- DAG.getNode(PPCISD::GlobalBaseReg,
- DebugLoc(), PtrVT), Hi);
- }
- Lo = DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Lo);
- return Lo;
+ unsigned MOHiFlag, MOLoFlag;
+ bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag);
+ SDValue CPIHi =
+ DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0, MOHiFlag);
+ SDValue CPILo =
+ DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0, MOLoFlag);
+ return LowerLabelRef(CPIHi, CPILo, isPIC, DAG);
}
SDValue PPCTargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
EVT PtrVT = Op.getValueType();
JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
- SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
- SDValue Zero = DAG.getConstant(0, PtrVT);
- // FIXME there isn't really any debug loc here
- DebugLoc dl = Op.getDebugLoc();
-
- const TargetMachine &TM = DAG.getTarget();
-
- SDValue Hi = DAG.getNode(PPCISD::Hi, dl, PtrVT, JTI, Zero);
- SDValue Lo = DAG.getNode(PPCISD::Lo, dl, PtrVT, JTI, Zero);
-
- // If this is a non-darwin platform, we don't support non-static relo models
- // yet.
- if (TM.getRelocationModel() == Reloc::Static ||
- !TM.getSubtarget<PPCSubtarget>().isDarwin()) {
- // Generate non-pic code that has direct accesses to the constant pool.
- // The address of the global is just (hi(&g)+lo(&g)).
- return DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Lo);
- }
-
- if (TM.getRelocationModel() == Reloc::PIC_) {
- // With PIC, the first instruction is actually "GR+hi(&G)".
- Hi = DAG.getNode(ISD::ADD, dl, PtrVT,
- DAG.getNode(PPCISD::GlobalBaseReg,
- DebugLoc(), PtrVT), Hi);
- }
-
- Lo = DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Lo);
- return Lo;
-}
-
-SDValue PPCTargetLowering::LowerGlobalTLSAddress(SDValue Op,
- SelectionDAG &DAG) const {
- llvm_unreachable("TLS not implemented for PPC.");
- return SDValue(); // Not reached
+
+ unsigned MOHiFlag, MOLoFlag;
+ bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag);
+ SDValue JTIHi = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOHiFlag);
+ SDValue JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOLoFlag);
+ return LowerLabelRef(JTIHi, JTILo, isPIC, DAG);
}
SDValue PPCTargetLowering::LowerBlockAddress(SDValue Op,
DebugLoc DL = Op.getDebugLoc();
const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
- SDValue TgtBA = DAG.getBlockAddress(BA, PtrVT, /*isTarget=*/true);
- SDValue Zero = DAG.getConstant(0, PtrVT);
- SDValue Hi = DAG.getNode(PPCISD::Hi, DL, PtrVT, TgtBA, Zero);
- SDValue Lo = DAG.getNode(PPCISD::Lo, DL, PtrVT, TgtBA, Zero);
-
- // If this is a non-darwin platform, we don't support non-static relo models
- // yet.
- const TargetMachine &TM = DAG.getTarget();
- if (TM.getRelocationModel() == Reloc::Static ||
- !TM.getSubtarget<PPCSubtarget>().isDarwin()) {
- // Generate non-pic code that has direct accesses to globals.
- // The address of the global is just (hi(&g)+lo(&g)).
- return DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
- }
-
- if (TM.getRelocationModel() == Reloc::PIC_) {
- // With PIC, the first instruction is actually "GR+hi(&G)".
- Hi = DAG.getNode(ISD::ADD, DL, PtrVT,
- DAG.getNode(PPCISD::GlobalBaseReg,
- DebugLoc(), PtrVT), Hi);
- }
-
- return DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
+
+ unsigned MOHiFlag, MOLoFlag;
+ bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag);
+ SDValue TgtBAHi = DAG.getBlockAddress(BA, PtrVT, /*isTarget=*/true, MOHiFlag);
+ SDValue TgtBALo = DAG.getBlockAddress(BA, PtrVT, /*isTarget=*/true, MOLoFlag);
+ return LowerLabelRef(TgtBAHi, TgtBALo, isPIC, DAG);
}
SDValue PPCTargetLowering::LowerGlobalAddress(SDValue Op,
SelectionDAG &DAG) const {
EVT PtrVT = Op.getValueType();
GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
- // FIXME there isn't really any debug info here
- DebugLoc dl = GSDN->getDebugLoc();
+ DebugLoc DL = GSDN->getDebugLoc();
const GlobalValue *GV = GSDN->getGlobal();
- SDValue GA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, GSDN->getOffset());
- SDValue Zero = DAG.getConstant(0, PtrVT);
const TargetMachine &TM = DAG.getTarget();
// 64-bit SVR4 ABI code is always position-independent.
// The actual address of the GlobalValue is stored in the TOC.
if (PPCSubTarget.isSVR4ABI() && PPCSubTarget.isPPC64()) {
- return DAG.getNode(PPCISD::TOC_ENTRY, dl, MVT::i64, GA,
+ SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset());
+ return DAG.getNode(PPCISD::TOC_ENTRY, DL, MVT::i64, GA,
DAG.getRegister(PPC::X2, MVT::i64));
}
- SDValue Hi = DAG.getNode(PPCISD::Hi, dl, PtrVT, GA, Zero);
- SDValue Lo = DAG.getNode(PPCISD::Lo, dl, PtrVT, GA, Zero);
+ SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset());
+
+
+ SDValue Zero = DAG.getConstant(0, PtrVT);
+ SDValue Hi = DAG.getNode(PPCISD::Hi, DL, PtrVT, GA, Zero);
+ SDValue Lo = DAG.getNode(PPCISD::Lo, DL, PtrVT, GA, Zero);
// If this is a non-darwin platform, we don't support non-static relo models
// yet.
!TM.getSubtarget<PPCSubtarget>().isDarwin()) {
// Generate non-pic code that has direct accesses to globals.
// The address of the global is just (hi(&g)+lo(&g)).
- return DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Lo);
+ return DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
}
if (TM.getRelocationModel() == Reloc::PIC_) {
// With PIC, the first instruction is actually "GR+hi(&G)".
- Hi = DAG.getNode(ISD::ADD, dl, PtrVT,
+ Hi = DAG.getNode(ISD::ADD, DL, PtrVT,
DAG.getNode(PPCISD::GlobalBaseReg,
DebugLoc(), PtrVT), Hi);
}
- Lo = DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Lo);
+ Lo = DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
if (!TM.getSubtarget<PPCSubtarget>().hasLazyResolverStub(GV, TM))
return Lo;
// If the global is weak or external, we have to go through the lazy
// resolution stub.
- return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Lo, MachinePointerInfo(),
+ return DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), Lo, MachinePointerInfo(),
false, false, 0);
}
case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
- case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
+ case ISD::GlobalTLSAddress: llvm_unreachable("TLS not implemented for PPC");
case ISD::JumpTable: return LowerJumpTable(Op, DAG);
case ISD::SETCC: return LowerSETCC(Op, DAG);
case ISD::TRAMPOLINE: return LowerTRAMPOLINE(Op, DAG);
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