diff options
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPC.h | 16 | ||||
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCISelLowering.cpp | 77 | ||||
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCInstrInfo.h | 2 | ||||
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCMCInstLower.cpp | 112 |
4 files changed, 172 insertions, 35 deletions
diff --git a/llvm/lib/Target/PowerPC/PPC.h b/llvm/lib/Target/PowerPC/PPC.h index 24e2710a15c..e3c071c4479 100644 --- a/llvm/lib/Target/PowerPC/PPC.h +++ b/llvm/lib/Target/PowerPC/PPC.h @@ -39,6 +39,22 @@ void LowerPPCMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI, extern Target ThePPC32Target; extern Target ThePPC64Target; + namespace PPCII { + + /// Target Operand Flag enum. + enum TOF { + //===------------------------------------------------------------------===// + // PPC Specific MachineOperand flags. + MO_NO_FLAG, + + /// MO_DARWIN_STUB - On a symbol operand "FOO", this indicates that the + /// reference is actually to the "FOO$stub" symbol. This is used for calls + /// and jumps to external functions on Tiger and earlier. + MO_DARWIN_STUB + + }; + } // end namespace PPCII + } // end namespace llvm; // Defines symbolic names for PowerPC registers. This defines a mapping from diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp index c1120d4f350..436a30241f8 100644 --- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp @@ -2451,7 +2451,11 @@ unsigned PrepareCall(SelectionDAG &DAG, SDValue &Callee, SDValue &InFlag, SDValue &Chain, DebugLoc dl, int SPDiff, bool isTailCall, SmallVector<std::pair<unsigned, SDValue>, 8> &RegsToPass, SmallVector<SDValue, 8> &Ops, std::vector<EVT> &NodeTys, - bool isPPC64, bool isSVR4ABI) { + const PPCSubtarget &PPCSubTarget) { + + bool isPPC64 = PPCSubTarget.isPPC64(); + bool isSVR4ABI = PPCSubTarget.isSVR4ABI(); + EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(); NodeTys.push_back(MVT::Other); // Returns a chain NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use. @@ -2464,24 +2468,49 @@ unsigned PrepareCall(SelectionDAG &DAG, SDValue &Callee, SDValue &InFlag, Callee = SDValue(Dest, 0); needIndirectCall = false; } - // XXX Work around for http://llvm.org/bugs/show_bug.cgi?id=5201 - // Use indirect calls for ALL functions calls in JIT mode, since the - // far-call stubs may be outside relocation limits for a BL instruction. - if (!DAG.getTarget().getSubtarget<PPCSubtarget>().isJITCodeModel()) { - // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every - // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol - // node so that legalize doesn't hack it. - if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) { + + if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) { + // XXX Work around for http://llvm.org/bugs/show_bug.cgi?id=5201 + // Use indirect calls for ALL functions calls in JIT mode, since the + // far-call stubs may be outside relocation limits for a BL instruction. + if (!DAG.getTarget().getSubtarget<PPCSubtarget>().isJITCodeModel()) { + unsigned OpFlags = 0; + if (DAG.getTarget().getRelocationModel() != Reloc::Static && + PPCSubTarget.getDarwinVers() < 9 && + (G->getGlobal()->isDeclaration() || + G->getGlobal()->isWeakForLinker())) { + // PC-relative references to external symbols should go through $stub, + // unless we're building with the leopard linker or later, which + // automatically synthesizes these stubs. + OpFlags = PPCII::MO_DARWIN_STUB; + } + + // If the callee is a GlobalAddress/ExternalSymbol node (quite common, + // every direct call is) turn it into a TargetGlobalAddress / + // TargetExternalSymbol node so that legalize doesn't hack it. Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, - Callee.getValueType()); + Callee.getValueType(), + 0, OpFlags); needIndirectCall = false; - } + } } + if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) { - Callee = DAG.getTargetExternalSymbol(S->getSymbol(), - Callee.getValueType()); - needIndirectCall = false; + unsigned char OpFlags = 0; + + if (DAG.getTarget().getRelocationModel() != Reloc::Static && + PPCSubTarget.getDarwinVers() < 9) { + // PC-relative references to external symbols should go through $stub, + // unless we're building with the leopard linker or later, which + // automatically synthesizes these stubs. + OpFlags = PPCII::MO_DARWIN_STUB; + } + + Callee = DAG.getTargetExternalSymbol(S->getSymbol(), Callee.getValueType(), + OpFlags); + needIndirectCall = false; } + if (needIndirectCall) { // Otherwise, this is an indirect call. We have to use a MTCTR/BCTRL pair // to do the call, we can't use PPCISD::CALL. @@ -2628,8 +2657,7 @@ PPCTargetLowering::FinishCall(CallingConv::ID CallConv, DebugLoc dl, SmallVector<SDValue, 8> Ops; unsigned CallOpc = PrepareCall(DAG, Callee, InFlag, Chain, dl, SPDiff, isTailCall, RegsToPass, Ops, NodeTys, - PPCSubTarget.isPPC64(), - PPCSubTarget.isSVR4ABI()); + PPCSubTarget); // When performing tail call optimization the callee pops its arguments off // the stack. Account for this here so these bytes can be pushed back on in @@ -2717,15 +2745,14 @@ PPCTargetLowering::LowerCall(SDValue Chain, SDValue Callee, isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv, isVarArg, Ins, DAG); - if (PPCSubTarget.isSVR4ABI() && !PPCSubTarget.isPPC64()) { + if (PPCSubTarget.isSVR4ABI() && !PPCSubTarget.isPPC64()) return LowerCall_SVR4(Chain, Callee, CallConv, isVarArg, isTailCall, Outs, OutVals, Ins, dl, DAG, InVals); - } else { - return LowerCall_Darwin(Chain, Callee, CallConv, isVarArg, - isTailCall, Outs, OutVals, Ins, - dl, DAG, InVals); - } + + return LowerCall_Darwin(Chain, Callee, CallConv, isVarArg, + isTailCall, Outs, OutVals, Ins, + dl, DAG, InVals); } SDValue @@ -2924,10 +2951,9 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee, InFlag = Chain.getValue(1); } - if (isTailCall) { + if (isTailCall) PrepareTailCall(DAG, InFlag, Chain, dl, false, SPDiff, NumBytes, LROp, FPOp, false, TailCallArguments); - } return FinishCall(CallConv, dl, isTailCall, isVarArg, DAG, RegsToPass, InFlag, Chain, Callee, SPDiff, NumBytes, @@ -3293,10 +3319,9 @@ PPCTargetLowering::LowerCall_Darwin(SDValue Chain, SDValue Callee, InFlag = Chain.getValue(1); } - if (isTailCall) { + if (isTailCall) PrepareTailCall(DAG, InFlag, Chain, dl, isPPC64, SPDiff, NumBytes, LROp, FPOp, true, TailCallArguments); - } return FinishCall(CallConv, dl, isTailCall, isVarArg, DAG, RegsToPass, InFlag, Chain, Callee, SPDiff, NumBytes, diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.h b/llvm/lib/Target/PowerPC/PPCInstrInfo.h index fc7b7b3cb89..92369d6f1d7 100644 --- a/llvm/lib/Target/PowerPC/PPCInstrInfo.h +++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.h @@ -58,7 +58,7 @@ enum PPC970_Unit { PPC970_VPERM = 6 << PPC970_Shift, // Vector Permute Unit PPC970_BRU = 7 << PPC970_Shift // Branch Unit }; -} +} // end namespace PPCII class PPCInstrInfo : public TargetInstrInfoImpl { diff --git a/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp b/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp index 6a753cf5f40..f7a9ba9cdfc 100644 --- a/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp +++ b/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp @@ -15,26 +15,125 @@ #include "PPC.h" #include "llvm/CodeGen/AsmPrinter.h" #include "llvm/CodeGen/MachineBasicBlock.h" +#include "llvm/CodeGen/MachineModuleInfoImpls.h" +#include "llvm/MC/MCAsmInfo.h" #include "llvm/MC/MCExpr.h" #include "llvm/MC/MCInst.h" #include "llvm/Target/Mangler.h" +#include "llvm/ADT/SmallString.h" using namespace llvm; +static MachineModuleInfoMachO &getMachOMMI(AsmPrinter &AP) { + return AP.MMI->getObjFileInfo<MachineModuleInfoMachO>(); +} + + +static MCSymbol *GetSymbolFromOperand(const MachineOperand &MO, AsmPrinter &AP){ + MCContext &Ctx = AP.OutContext; + + SmallString<128> Name; + if (!MO.isGlobal()) { + assert(MO.isSymbol() && "Isn't a symbol reference"); + Name += AP.MAI->getGlobalPrefix(); + Name += MO.getSymbolName(); + } else { + const GlobalValue *GV = MO.getGlobal(); + bool isImplicitlyPrivate = false; + if (MO.getTargetFlags() == PPCII::MO_DARWIN_STUB || + //MO.getTargetFlags() == PPCII::MO_DARWIN_NONLAZY || + //MO.getTargetFlags() == PPCII::MO_DARWIN_NONLAZY_PIC_BASE || + //MO.getTargetFlags() == PPCII::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE + 0) + isImplicitlyPrivate = true; + + AP.Mang->getNameWithPrefix(Name, GV, isImplicitlyPrivate); + } + + // If the target flags on the operand changes the name of the symbol, do that + // before we return the symbol. + switch (MO.getTargetFlags()) { + default: break; +#if 0 + case X86II::MO_DARWIN_NONLAZY: + case X86II::MO_DARWIN_NONLAZY_PIC_BASE: { + Name += "$non_lazy_ptr"; + MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str()); + + MachineModuleInfoImpl::StubValueTy &StubSym = + getMachOMMI(AP).getGVStubEntry(Sym); + if (StubSym.getPointer() == 0) { + assert(MO.isGlobal() && "Extern symbol not handled yet"); + StubSym = + MachineModuleInfoImpl:: + StubValueTy(Mang->getSymbol(MO.getGlobal()), + !MO.getGlobal()->hasInternalLinkage()); + } + return Sym; + } + case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE: { + Name += "$non_lazy_ptr"; + MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str()); + MachineModuleInfoImpl::StubValueTy &StubSym = + getMachOMMI(AP).getHiddenGVStubEntry(Sym); + if (StubSym.getPointer() == 0) { + assert(MO.isGlobal() && "Extern symbol not handled yet"); + StubSym = + MachineModuleInfoImpl:: + StubValueTy(Mang->getSymbol(MO.getGlobal()), + !MO.getGlobal()->hasInternalLinkage()); + } + return Sym; + } +#endif + case PPCII::MO_DARWIN_STUB: { + Name += "$stub"; + MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str()); + MachineModuleInfoImpl::StubValueTy &StubSym = + getMachOMMI(AP).getFnStubEntry(Sym); + if (StubSym.getPointer()) + return Sym; + + if (MO.isGlobal()) { + StubSym = + MachineModuleInfoImpl:: + StubValueTy(AP.Mang->getSymbol(MO.getGlobal()), + !MO.getGlobal()->hasInternalLinkage()); + } else { + Name.erase(Name.end()-5, Name.end()); + StubSym = + MachineModuleInfoImpl:: + StubValueTy(Ctx.GetOrCreateSymbol(Name.str()), false); + } + return Sym; + } + } + + return Ctx.GetOrCreateSymbol(Name.str()); +} + static MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol, AsmPrinter &Printer) { MCContext &Ctx = Printer.OutContext; - const MCExpr *Expr; + MCSymbolRefExpr::VariantKind RefKind = MCSymbolRefExpr::VK_None; + + const MCExpr *Expr = 0; switch (MO.getTargetFlags()) { default: assert(0 && "Unknown target flag on symbol operand"); - case 0: - Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None, Ctx); + case PPCII::MO_NO_FLAG: + // These affect the name of the symbol, not any suffix. + case PPCII::MO_DARWIN_STUB: break; + #if 0 - case ARMII::MO_LO16: + case PPCII::MO_LO16: Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_LO16, Ctx); break; #endif } + + if (Expr == 0) + Expr = MCSymbolRefExpr::Create(Symbol, RefKind, Ctx); + if (!MO.isJTI() && MO.getOffset()) Expr = MCBinaryExpr::CreateAdd(Expr, @@ -68,11 +167,8 @@ void llvm::LowerPPCMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI, MO.getMBB()->getSymbol(), AP.OutContext)); break; case MachineOperand::MO_GlobalAddress: - MCOp = GetSymbolRef(MO, AP.Mang->getSymbol(MO.getGlobal()), AP); - break; case MachineOperand::MO_ExternalSymbol: - MCOp = GetSymbolRef(MO, - AP.GetExternalSymbolSymbol(MO.getSymbolName()), AP); + MCOp = GetSymbolRef(MO, GetSymbolFromOperand(MO, AP), AP); break; case MachineOperand::MO_JumpTableIndex: MCOp = GetSymbolRef(MO, AP.GetJTISymbol(MO.getIndex()), AP); |
