diff options
| -rw-r--r-- | lib/Target/PowerPC/PPCCallingConv.td | 5 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCISelDAGToDAG.cpp | 6 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCISelLowering.cpp | 258 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCISelLowering.h | 17 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCInstr64Bit.td | 13 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCInstrFormats.td | 12 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCInstrInfo.td | 43 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCRegisterInfo.cpp | 12 | ||||
| -rw-r--r-- | lib/Target/PowerPC/PPCRegisterInfo.h | 1 | ||||
| -rw-r--r-- | test/CodeGen/PowerPC/sjlj.ll | 108 |
10 files changed, 475 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCCallingConv.td b/lib/Target/PowerPC/PPCCallingConv.td index caeb1796f7..2a680661d3 100644 --- a/lib/Target/PowerPC/PPCCallingConv.td +++ b/lib/Target/PowerPC/PPCCallingConv.td @@ -136,3 +136,8 @@ def CSR_SVR464 : CalleeSavedRegs<(add X14, X15, X16, X17, X18, X19, X20, VRSAV F27, F28, F29, F30, F31, CR2, CR3, CR4, V20, V21, V22, V23, V24, V25, V26, V27, V28, V29, V30, V31)>; + +def CSR_NoRegs : CalleeSavedRegs<(add)>; + +def CSR_NoRegs_Altivec : CalleeSavedRegs<(add (sequence "V%u", 0, 31), VRSAVE)>; + diff --git a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp index 17bea8a6a6..90a3a5c6a4 100644 --- a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp +++ b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp @@ -164,6 +164,12 @@ namespace { return PPCLowering.SelectAddressRegImmShift(N, Disp, Base, *CurDAG); } + // Select an address into a single register. + bool SelectAddr(SDValue N, SDValue &Base) { + Base = N; + return true; + } + /// SelectInlineAsmMemoryOperand - Implement addressing mode selection for /// inline asm expressions. It is always correct to compute the value into /// a register. The case of adding a (possibly relocatable) constant to a diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp index 72cb6f535a..5e11f01b49 100644 --- a/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/lib/Target/PowerPC/PPCISelLowering.cpp @@ -70,6 +70,7 @@ static TargetLoweringObjectFile *CreateTLOF(const PPCTargetMachine &TM) { PPCTargetLowering::PPCTargetLowering(PPCTargetMachine &TM) : TargetLowering(TM, CreateTLOF(TM)), PPCSubTarget(*TM.getSubtargetImpl()) { const PPCSubtarget *Subtarget = &TM.getSubtarget<PPCSubtarget>(); + PPCRegInfo = TM.getRegisterInfo(); setPow2DivIsCheap(); @@ -211,6 +212,14 @@ PPCTargetLowering::PPCTargetLowering(PPCTargetMachine &TM) setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand); setOperationAction(ISD::EHSELECTION, MVT::i32, Expand); + // NOTE: EH_SJLJ_SETJMP/_LONGJMP supported here is NOT intened to support + // SjLj exception handling but a light-weight setjmp/longjmp replacement to + // support continuation, user-level threading, and etc.. As a result, no + // other SjLj exception interfaces are implemented and please don't build + // your own exception handling based on them. + // LLVM/Clang supports zero-cost DWARF exception handling. + setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom); + setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom); // We want to legalize GlobalAddress and ConstantPool nodes into the // appropriate instructions to materialize the address. @@ -567,6 +576,8 @@ const char *PPCTargetLowering::getTargetNodeName(unsigned Opcode) const { case PPCISD::BCTRL_Darwin: return "PPCISD::BCTRL_Darwin"; case PPCISD::BCTRL_SVR4: return "PPCISD::BCTRL_SVR4"; case PPCISD::RET_FLAG: return "PPCISD::RET_FLAG"; + case PPCISD::EH_SJLJ_SETJMP: return "PPCISD::EH_SJLJ_SETJMP"; + case PPCISD::EH_SJLJ_LONGJMP: return "PPCISD::EH_SJLJ_LONGJMP"; case PPCISD::MFCR: return "PPCISD::MFCR"; case PPCISD::VCMP: return "PPCISD::VCMP"; case PPCISD::VCMPo: return "PPCISD::VCMPo"; @@ -4561,6 +4572,21 @@ SDValue PPCTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op, return DAG.getNode(PPCISD::DYNALLOC, dl, VTs, Ops, 3); } +SDValue PPCTargetLowering::lowerEH_SJLJ_SETJMP(SDValue Op, + SelectionDAG &DAG) const { + DebugLoc DL = Op.getDebugLoc(); + return DAG.getNode(PPCISD::EH_SJLJ_SETJMP, DL, + DAG.getVTList(MVT::i32, MVT::Other), + Op.getOperand(0), Op.getOperand(1)); +} + +SDValue PPCTargetLowering::lowerEH_SJLJ_LONGJMP(SDValue Op, + SelectionDAG &DAG) const { + DebugLoc DL = Op.getDebugLoc(); + return DAG.getNode(PPCISD::EH_SJLJ_LONGJMP, DL, MVT::Other, + Op.getOperand(0), Op.getOperand(1)); +} + /// LowerSELECT_CC - Lower floating point select_cc's into fsel instruction when /// possible. SDValue PPCTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const { @@ -5557,6 +5583,9 @@ SDValue PPCTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const { case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG, PPCSubTarget); + case ISD::EH_SJLJ_SETJMP: return lowerEH_SJLJ_SETJMP(Op, DAG); + case ISD::EH_SJLJ_LONGJMP: return lowerEH_SJLJ_LONGJMP(Op, DAG); + case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG); case ISD::FP_TO_UINT: case ISD::FP_TO_SINT: return LowerFP_TO_INT(Op, DAG, @@ -5869,9 +5898,238 @@ PPCTargetLowering::EmitPartwordAtomicBinary(MachineInstr *MI, return BB; } +llvm::MachineBasicBlock* +PPCTargetLowering::emitEHSjLjSetJmp(MachineInstr *MI, + MachineBasicBlock *MBB) const { + DebugLoc DL = MI->getDebugLoc(); + const TargetInstrInfo *TII = getTargetMachine().getInstrInfo(); + + MachineFunction *MF = MBB->getParent(); + MachineRegisterInfo &MRI = MF->getRegInfo(); + + const BasicBlock *BB = MBB->getBasicBlock(); + MachineFunction::iterator I = MBB; + ++I; + + // Memory Reference + MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin(); + MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end(); + + unsigned DstReg = MI->getOperand(0).getReg(); + const TargetRegisterClass *RC = MRI.getRegClass(DstReg); + assert(RC->hasType(MVT::i32) && "Invalid destination!"); + unsigned mainDstReg = MRI.createVirtualRegister(RC); + unsigned restoreDstReg = MRI.createVirtualRegister(RC); + + MVT PVT = getPointerTy(); + assert((PVT == MVT::i64 || PVT == MVT::i32) && + "Invalid Pointer Size!"); + // For v = setjmp(buf), we generate + // + // thisMBB: + // SjLjSetup mainMBB + // bl mainMBB + // v_restore = 1 + // b sinkMBB + // + // mainMBB: + // buf[LabelOffset] = LR + // v_main = 0 + // + // sinkMBB: + // v = phi(main, restore) + // + + MachineBasicBlock *thisMBB = MBB; + MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB); + MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB); + MF->insert(I, mainMBB); + MF->insert(I, sinkMBB); + + MachineInstrBuilder MIB; + + // Transfer the remainder of BB and its successor edges to sinkMBB. + sinkMBB->splice(sinkMBB->begin(), MBB, + llvm::next(MachineBasicBlock::iterator(MI)), MBB->end()); + sinkMBB->transferSuccessorsAndUpdatePHIs(MBB); + + // Note that the structure of the jmp_buf used here is not compatible + // with that used by libc, and is not designed to be. Specifically, it + // stores only those 'reserved' registers that LLVM does not otherwise + // understand how to spill. Also, by convention, by the time this + // intrinsic is called, Clang has already stored the frame address in the + // first slot of the buffer and stack address in the third. Following the + // X86 target code, we'll store the jump address in the second slot. We also + // need to save the TOC pointer (R2) to handle jumps between shared + // libraries, and that will be stored in the fourth slot. The thread + // identifier (R13) is not affected. + + // thisMBB: + const int64_t LabelOffset = 1 * PVT.getStoreSize(); + const int64_t TOCOffset = 3 * PVT.getStoreSize(); + + // Prepare IP either in reg. + const TargetRegisterClass *PtrRC = getRegClassFor(PVT); + unsigned LabelReg = MRI.createVirtualRegister(PtrRC); + unsigned BufReg = MI->getOperand(1).getReg(); + + if (PPCSubTarget.isPPC64() && PPCSubTarget.isSVR4ABI()) { + MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::STD)) + .addReg(PPC::X2) + .addImm(TOCOffset / 4) + .addReg(BufReg); + + MIB.setMemRefs(MMOBegin, MMOEnd); + } + + // Setup + MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::BCL)).addMBB(mainMBB); + MIB.addRegMask(PPCRegInfo->getNoPreservedMask()); + + BuildMI(*thisMBB, MI, DL, TII->get(PPC::LI), restoreDstReg).addImm(1); + + MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::EH_SjLj_Setup)) + .addMBB(mainMBB); + MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::B)).addMBB(sinkMBB); + + thisMBB->addSuccessor(mainMBB, /* weight */ 0); + thisMBB->addSuccessor(sinkMBB, /* weight */ 1); + + // mainMBB: + // mainDstReg = 0 + MIB = BuildMI(mainMBB, DL, + TII->get(PPCSubTarget.isPPC64() ? PPC::MFLR8 : PPC::MFLR), LabelReg); + + // Store IP + if (PPCSubTarget.isPPC64()) { + MIB = BuildMI(mainMBB, DL, TII->get(PPC::STD)) + .addReg(LabelReg) + .addImm(LabelOffset / 4) + .addReg(BufReg); + } else { + MIB = BuildMI(mainMBB, DL, TII->get(PPC::STW)) + .addReg(LabelReg) + .addImm(LabelOffset) + .addReg(BufReg); + } + + MIB.setMemRefs(MMOBegin, MMOEnd); + + BuildMI(mainMBB, DL, TII->get(PPC::LI), mainDstReg).addImm(0); + mainMBB->addSuccessor(sinkMBB); + + // sinkMBB: + BuildMI(*sinkMBB, sinkMBB->begin(), DL, + TII->get(PPC::PHI), DstReg) + .addReg(mainDstReg).addMBB(mainMBB) + .addReg(restoreDstReg).addMBB(thisMBB); + + MI->eraseFromParent(); + return sinkMBB; +} + +MachineBasicBlock * +PPCTargetLowering::emitEHSjLjLongJmp(MachineInstr *MI, + MachineBasicBlock *MBB) const { + DebugLoc DL = MI->getDebugLoc(); + const TargetInstrInfo *TII = getTargetMachine().getInstrInfo(); + + MachineFunction *MF = MBB->getParent(); + MachineRegisterInfo &MRI = MF->getRegInfo(); + + // Memory Reference + MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin(); + MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end(); + + MVT PVT = getPointerTy(); + assert((PVT == MVT::i64 || PVT == MVT::i32) && + "Invalid Pointer Size!"); + + const TargetRegisterClass *RC = + (PVT == MVT::i64) ? &PPC::G8RCRegClass : &PPC::GPRCRegClass; + unsigned Tmp = MRI.createVirtualRegister(RC); + // Since FP is only updated here but NOT referenced, it's treated as GPR. + unsigned FP = (PVT == MVT::i64) ? PPC::X31 : PPC::R31; + unsigned SP = (PVT == MVT::i64) ? PPC::X1 : PPC::R1; + + MachineInstrBuilder MIB; + + const int64_t LabelOffset = 1 * PVT.getStoreSize(); + const int64_t SPOffset = 2 * PVT.getStoreSize(); + const int64_t TOCOffset = 3 * PVT.getStoreSize(); + + unsigned BufReg = MI->getOperand(0).getReg(); + + // Reload FP (the jumped-to function may not have had a + // frame pointer, and if so, then its r31 will be restored + // as necessary). + if (PVT == MVT::i64) { + MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), FP) + .addImm(0) + .addReg(BufReg); + } else { + MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), FP) + .addImm(0) + .addReg(BufReg); + } + MIB.setMemRefs(MMOBegin, MMOEnd); + + // Reload IP + if (PVT == MVT::i64) { + MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), Tmp) + .addImm(LabelOffset / 4) + .addReg(BufReg); + } else { + MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), Tmp) + .addImm(LabelOffset) + .addReg(BufReg); + } + MIB.setMemRefs(MMOBegin, MMOEnd); + + // Reload SP + if (PVT == MVT::i64) { + MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), SP) + .addImm(SPOffset / 4) + .addReg(BufReg); + } else { + MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), SP) + .addImm(SPOffset) + .addReg(BufReg); + } + MIB.setMemRefs(MMOBegin, MMOEnd); + + // FIXME: When we also support base pointers, that register must also be + // restored here. + + // Reload TOC + if (PVT == MVT::i64 && PPCSubTarget.isSVR4ABI()) { + MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), PPC::X2) + .addImm(TOCOffset / 4) + .addReg(BufReg); + + MIB.setMemRefs(MMOBegin, MMOEnd); + } + + // Jump + BuildMI(*MBB, MI, DL, + TII->get(PVT == MVT::i64 ? PPC::MTCTR8 : PPC::MTCTR)).addReg(Tmp); + BuildMI(*MBB, MI, DL, TII->get(PVT == MVT::i64 ? PPC::BCTR8 : PPC::BCTR)); + + MI->eraseFromParent(); + return MBB; +} + MachineBasicBlock * PPCTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *BB) const { + if (MI->getOpcode() == PPC::EH_SjLj_SetJmp32 || + MI->getOpcode() == PPC::EH_SjLj_SetJmp64) { + return emitEHSjLjSetJmp(MI, BB); + } else if (MI->getOpcode() == PPC::EH_SjLj_LongJmp32 || + MI->getOpcode() == PPC::EH_SjLj_LongJmp64) { + return emitEHSjLjLongJmp(MI, BB); + } + const TargetInstrInfo *TII = getTargetMachine().getInstrInfo(); // To "insert" these instructions we actually have to insert their diff --git a/lib/Target/PowerPC/PPCISelLowering.h b/lib/Target/PowerPC/PPCISelLowering.h index 8d44d9ff46..1b0427e021 100644 --- a/lib/Target/PowerPC/PPCISelLowering.h +++ b/lib/Target/PowerPC/PPCISelLowering.h @@ -16,6 +16,7 @@ #define LLVM_TARGET_POWERPC_PPC32ISELLOWERING_H #include "PPC.h" +#include "PPCRegisterInfo.h" #include "PPCSubtarget.h" #include "llvm/CodeGen/SelectionDAG.h" #include "llvm/Target/TargetLowering.h" @@ -119,6 +120,12 @@ namespace llvm { /// are undefined. MFCR, + // EH_SJLJ_SETJMP - SjLj exception handling setjmp. + EH_SJLJ_SETJMP, + + // EH_SJLJ_LONGJMP - SjLj exception handling longjmp. + EH_SJLJ_LONGJMP, + /// RESVEC = VCMP(LHS, RHS, OPC) - Represents one of the altivec VCMP* /// instructions. For lack of better number, we use the opcode number /// encoding for the OPC field to identify the compare. For example, 838 @@ -321,6 +328,7 @@ namespace llvm { class PPCTargetLowering : public TargetLowering { const PPCSubtarget &PPCSubTarget; + const PPCRegisterInfo *PPCRegInfo; public: explicit PPCTargetLowering(PPCTargetMachine &TM); @@ -395,6 +403,12 @@ namespace llvm { MachineBasicBlock *MBB, bool is8bit, unsigned Opcode) const; + MachineBasicBlock *emitEHSjLjSetJmp(MachineInstr *MI, + MachineBasicBlock *MBB) const; + + MachineBasicBlock *emitEHSjLjLongJmp(MachineInstr *MI, + MachineBasicBlock *MBB) const; + ConstraintType getConstraintType(const std::string &Constraint) const; /// Examine constraint string and operand type and determine a weight value. @@ -608,6 +622,9 @@ namespace llvm { const SmallVectorImpl<ISD::InputArg> &Ins, DebugLoc dl, SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const; + + SDValue lowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const; + SDValue lowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const; }; } diff --git a/lib/Target/PowerPC/PPCInstr64Bit.td b/lib/Target/PowerPC/PPCInstr64Bit.td index f43ed53512..975a7174f6 100644 --- a/lib/Target/PowerPC/PPCInstr64Bit.td +++ b/lib/Target/PowerPC/PPCInstr64Bit.td @@ -273,6 +273,19 @@ def MFCR8 : XFXForm_3<31, 19, (outs G8RC:$rT), (ins), "mfcr $rT", SprMFCR>, PPC970_MicroCode, PPC970_Unit_CRU; +let hasSideEffects = 1, isBarrier = 1, isCodeGenOnly = 1, + usesCustomInserter = 1 in { + def EH_SjLj_SetJmp64 : Pseudo<(outs GPRC:$dst), (ins memr:$buf), + "#EH_SJLJ_SETJMP64", + [(set GPRC:$dst, (PPCeh_sjlj_setjmp addr:$buf))]>, + Requires<[In64BitMode]>; + let isTerminator = 1 in + def EH_SjLj_LongJmp64 : Pseudo<(outs), (ins memr:$buf), + "#EH_SJLJ_LONGJMP64", + [(PPCeh_sjlj_longjmp addr:$buf)]>, + Requires<[In64BitMode]>; +} + //===----------------------------------------------------------------------===// // 64-bit SPR manipulation instrs. diff --git a/lib/Target/PowerPC/PPCInstrFormats.td b/lib/Target/PowerPC/PPCInstrFormats.td index c3c171cd21..16dbee5d29 100644 --- a/lib/Target/PowerPC/PPCInstrFormats.td +++ b/lib/Target/PowerPC/PPCInstrFormats.td @@ -120,6 +120,18 @@ class BForm_1<bits<6> opcode, bits<5> bo, bit aa, bit lk, dag OOL, dag IOL, let CR = 0; } +class BForm_2<bits<6> opcode, bits<5> bo, bits<5> bi, bit aa, bit lk, + dag OOL, dag IOL, string asmstr> + : I<opcode, OOL, IOL, asmstr, BrB> { + bits<14> BD; + + let Inst{6-10} = bo; + let Inst{11-15} = bi; + let Inst{16-29} = BD; + let Inst{30} = aa; + let Inst{31} = lk; +} + // 1.7.4 D-Form class DForm_base<bits<6> opcode, dag OOL, dag IOL, string asmstr, InstrItinClass itin, list<dag> pattern> diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td index a05ebad41a..84cdb1f39d 100644 --- a/lib/Target/PowerPC/PPCInstrInfo.td +++ b/lib/Target/PowerPC/PPCInstrInfo.td @@ -158,6 +158,14 @@ def retflag : SDNode<"PPCISD::RET_FLAG", SDTNone, def PPCtc_return : SDNode<"PPCISD::TC_RETURN", SDT_PPCTC_ret, [SDNPHasChain, SDNPOptInGlue, SDNPVariadic]>; +def PPCeh_sjlj_setjmp : SDNode<"PPCISD::EH_SJLJ_SETJMP", + SDTypeProfile<1, 1, [SDTCisInt<0>, + SDTCisPtrTy<1>]>, + [SDNPHasChain, SDNPSideEffect]>; +def PPCeh_sjlj_longjmp : SDNode<"PPCISD::EH_SJLJ_LONGJMP", + SDTypeProfile<0, 1, [SDTCisPtrTy<0>]>, + [SDNPHasChain, SDNPSideEffect]>; + def PPCvcmp : SDNode<"PPCISD::VCMP" , SDT_PPCvcmp, []>; def PPCvcmp_o : SDNode<"PPCISD::VCMPo", SDT_PPCvcmp, [SDNPOutGlue]>; @@ -391,6 +399,12 @@ def memrix : Operand<iPTR> { // memri where the imm is shifted 2 bits. let EncoderMethod = "getMemRIXEncoding"; } +// A single-register address. This is used with the SjLj +// pseudo-instructions. +def memr : Operand<iPTR> { + let MIOperandInfo = (ops ptr_rc:$ptrreg); +} + // PowerPC Predicate operand. 20 = (0<<5)|20 = always, CR0 is a dummy reg // that doesn't matter. def pred : PredicateOperand<OtherVT, (ops imm, CRRC), @@ -404,6 +418,10 @@ def xaddr : ComplexPattern<iPTR, 2, "SelectAddrIdx", [], []>; def xoaddr : ComplexPattern<iPTR, 2, "SelectAddrIdxOnly",[], []>; def ixaddr : ComplexPattern<iPTR, 2, "SelectAddrImmShift", [], []>; // "std" +// The address in a single register. This is used with the SjLj +// pseudo-instructions. +def addr : ComplexPattern<iPTR, 1, "SelectAddr",[], []>; + /// This is just the offset part of iaddr, used for preinc. def iaddroff : ComplexPattern<iPTR, 1, "SelectAddrImmOffs", [], []>; def xaddroff : ComplexPattern<iPTR, 1, "SelectAddrIdxOffs", [], []>; @@ -505,6 +523,14 @@ let isBranch = 1, isTerminator = 1, hasCtrlDep = 1, PPC970_Unit = 7 in { } } +// The direct BCL used by the SjLj setjmp code. +let isCall = 1, hasCtrlDep = 1, PPC970_Unit = 7 in { + let Defs = [LR], Uses = [RM] in { + def BCL : BForm_2<16, 20, 31, 0, 1, (outs), (ins condbrtarget:$dst), + "bcl 20, 31, $dst">; + } +} + // Darwin ABI Calls. let isCall = 1, PPC970_Unit = 7, Defs = [LR] in { // Convenient aliases for call instructions @@ -583,6 +609,23 @@ def TAILBA : IForm<18, 0, 0, (outs), (ins aaddr:$dst), "ba $dst", BrB, []>; +let hasSideEffects = 1, isBarrier = 1, isCodeGenOnly = 1, + usesCustomInserter = 1 in { + def EH_SjLj_SetJmp32 : Pseudo<(outs GPRC:$dst), (ins memr:$buf), + "#EH_SJLJ_SETJMP32", + [(set GPRC:$dst, (PPCeh_sjlj_setjmp addr:$buf))]>, + Requires<[In32BitMode]>; + let isTerminator = 1 in + def EH_SjLj_LongJmp32 : Pseudo<(outs), (ins memr:$buf), + "#EH_SJLJ_LONGJMP32", + [(PPCeh_sjlj_longjmp addr:$buf)]>, + Requires<[In32BitMode]>; +} + +let isBranch = 1, isTerminator = 1, isCodeGenOnly = 1 in { + def EH_SjLj_Setup : Pseudo<(outs), (ins directbrtarget:$dst), + "#EH_SjLj_Setup\t$dst", []>; +} // DCB* instructions. def DCBA : DCB_Form<758, 0, (outs), (ins memrr:$dst), diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp index f3ac23184f..150e241161 100644 --- a/lib/Target/PowerPC/PPCRegisterInfo.cpp +++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp @@ -105,6 +105,18 @@ PPCRegisterInfo::getCallPreservedMask(CallingConv::ID CC) const { return Subtarget.isPPC64() ? CSR_SVR464_RegMask : CSR_SVR432_RegMask; } +const uint32_t* +PPCRegisterInfo::getNoPreservedMask() const { + // The naming here is inverted: The CSR_NoRegs_Altivec has the + // Altivec registers masked so that they're not saved and restored around + // instructions with this preserved mask. + + if (!Subtarget.hasAltivec()) + return CSR_NoRegs_Altivec_RegMask; + + return CSR_NoRegs_RegMask; +} + BitVector PPCRegisterInfo::getReservedRegs(const MachineFunction &MF) const { BitVector Reserved(getNumRegs()); const PPCFrameLowering *PPCFI = diff --git a/lib/Target/PowerPC/PPCRegisterInfo.h b/lib/Target/PowerPC/PPCRegisterInfo.h index 1c020ea5c9..ba0fb48b85 100644 --- a/lib/Target/PowerPC/PPCRegisterInfo.h +++ b/lib/Target/PowerPC/PPCRegisterInfo.h @@ -44,6 +44,7 @@ public: /// Code Generation virtual methods... const uint16_t *getCalleeSavedRegs(const MachineFunction* MF = 0) const; const uint32_t *getCallPreservedMask(CallingConv::ID CC) const; + const uint32_t *getNoPreservedMask() const; BitVector getReservedRegs(const MachineFunction &MF) const; diff --git a/test/CodeGen/PowerPC/sjlj.ll b/test/CodeGen/PowerPC/sjlj.ll new file mode 100644 index 0000000000..3440b314dd --- /dev/null +++ b/test/CodeGen/PowerPC/sjlj.ll @@ -0,0 +1,108 @@ +; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 | FileCheck %s +; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 | FileCheck -check-prefix=CHECK-NOAV %s +target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64" +target triple = "powerpc64-unknown-linux-gnu" + +%struct.__jmp_buf_tag = type { [64 x i64], i32, %struct.__sigset_t, [8 x i8] } +%struct.__sigset_t = type { [16 x i64] } + +@env_sigill = internal global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16 + +define void @foo() #0 { +entry: + call void @llvm.eh.sjlj.longjmp(i8* bitcast ([1 x %struct.__jmp_buf_tag]* @env_sigill to i8*)) + unreachable + +; CHECK: @foo +; CHECK: addis [[REG:[0-9]+]], 2, env_sigill@toc@ha +; CHECK: addi [[REG]], [[REG]], env_sigill@toc@l +; CHECK: ld 31, 0([[REG]]) +; CHECK: ld [[REG2:[0-9]+]], 8([[REG]]) +; CHECK: ld 1, 16([[REG]]) +; CHECK: mtctr [[REG2]] +; CHECK: ld 2, 24([[REG]]) +; CHECK: bctr + +return: ; No predecessors! + ret void +} + +declare void @llvm.eh.sjlj.longjmp(i8*) #1 + +define signext i32 @main() #0 { +entry: + %retval = alloca i32, align 4 + store i32 0, i32* %retval + %0 = call i8* @llvm.frameaddress(i32 0) + store i8* %0, i8** bitcast ([1 x %struct.__jmp_buf_tag]* @env_sigill to i8**) + %1 = call i8* @llvm.stacksave() + store i8* %1, i8** getelementptr (i8** bitcast ([1 x %struct.__jmp_buf_tag]* @env_sigill to i8**), i32 2) + %2 = call i32 @llvm.eh.sjlj.setjmp(i8* bitcast ([1 x %struct.__jmp_buf_tag]* @env_sigill to i8*)) + %tobool = icmp ne i32 %2, 0 + br i1 %tobool, label %if.then, label %if.else + +if.then: ; preds = %entry + store i32 1, i32* %retval + br label %return + +if.else: ; preds = %entry + call void @foo() + br label %if.end + +if.end: ; preds = %if.else + store i32 0, i32* %retval + br label %return + +return: ; preds = %if.end, %if.then + %3 = load i32* %retval + ret i32 %3 + +; CHECK: @main +; CHECK: std +; CHECK: stfd +; CHECK: stvx + +; CHECK: addis [[REG:[0-9]+]], 2, env_sigill@toc@ha +; CHECK: std 31, env_sigill@toc@l([[REG]]) +; CHECK: addi [[REG]], [[REG]], env_sigill@toc@l +; CHECK: std [[REG]], [[OFF:[0-9]+]](31) # 8-byte Folded Spill +; CHECK: std 1, 16([[REG]]) +; CHECK: std 2, 24([[REG]]) +; CHECK: bcl 20, 31, .LBB1_1 +; CHECK: li 3, 1 +; CHECK: #EH_SjLj_Setup .LBB1_1 +; CHECK: b .LBB1_2 + +; CHECK: .LBB1_1: +; CHECK: mflr [[REGL:[0-9]+]] +; CHECK: ld [[REG2:[0-9]+]], [[OFF]](31) # 8-byte Folded Reload +; CHECK: std [[REGL]], 8([[REG2]]) +; CHECK: li 3, 0 + +; CHECK: .LBB1_2: + +; CHECK: lfd +; CHECK: lvx +; CHECK: ld +; CHECK: blr + +; CHECK-NOAV: @main +; CHECK-NOAV-NOT: stvx +; CHECK-NOAV: bcl +; CHECK-NOAV: mflr +; CHECK-NOAV: bl foo +; CHECK-NOAV-NOT: lvx +; CHECK-NOAV: blr +} + +declare i8* @llvm.frameaddress(i32) #2 + +declare i8* @llvm.stacksave() #3 + +declare i32 @llvm.eh.sjlj.setjmp(i8*) #3 + +attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" } +attributes #1 = { noreturn nounwind } +attributes #2 = { nounwind readnone } +attributes #3 = { nounwind } + |