[llvm] r221948 - First stage of call lowering for Mips fast-isel

reed kotler rkotler at mips.com
Thu Nov 13 17:24:35 PST 2014


On 11/13/2014 05:20 PM, Reid Kleckner wrote:
> Looks like you're including that .inc file twice, which is going to 
> duplicate the code. IMO it'd be better to call over from FastISel into 
> a wrapper in ISelLowering if you want to use these.
>
I think it's a mistake for tablegen to be generating static functions here.

Why should I have to make a wrapper?

I've raised this issue before but did not get any response.

> On Thu, Nov 13, 2014 at 5:04 PM, reed kotler <rkotler at mips.com 
> <mailto:rkotler at mips.com>> wrote:
>
>     On 11/13/2014 04:48 PM, David Blaikie wrote:
>>
>>
>>     On Thu, Nov 13, 2014 at 4:40 PM, Reid Kleckner <rnk at google.com
>>     <mailto:rnk at google.com>> wrote:
>>
>>         Please don't use GCC-specific features like __attribute__
>>         directly. Use the portability macros in
>>         llvm/Support/Compiler.h, as in r221956.
>>
>>
>>     Why are these marked as unused anyway - if they're unused they
>>     should just be deleted, yes? (question more to Reed than Reid)
>>
>>
>     Okay.
>
>     The problem here was that tablegen declares those functions as
>     static in the calling convention .inc file.
>
>     Then if you include the file you have to use the them or else you
>     get warnings
>     and will break some peoples builds.
>
>     I don't use them all in fast-isel.
>
>
>>         On Thu, Nov 13, 2014 at 3:37 PM, Reed Kotler
>>         <rkotler at mips.com <mailto:rkotler at mips.com>> wrote:
>>
>>             Author: rkotler
>>             Date: Thu Nov 13 17:37:45 2014
>>             New Revision: 221948
>>
>>             URL: http://llvm.org/viewvc/llvm-project?rev=221948&view=rev
>>             Log:
>>             First stage of call lowering for Mips fast-isel
>>
>>             Summary:
>>             This has most of what is needed for mips fast-isel call
>>             lowering for O32.
>>             What is missing I will add on the next patch because this
>>             patch is already too large.
>>             It should not be doing anything wrong but it will punt on
>>             some cases that it is basically
>>             capable of doing.
>>
>>             The mechanism is there for parameters to be passed on the
>>             stack but I have not enabled it because it serves as a
>>             way for now to prevent some of the strange cases of O32
>>             register passing that I have not fully checked yet and
>>             have some issues.
>>
>>             The Mips O32 abi rules are very complicated as far how
>>             data is passed in floating and integer registers.
>>
>>             However there is a way to think about this all very
>>             simply and this implementation reflects that.
>>
>>             Basically, the ABI rules are written as if everything is
>>             passed on the stack and aligned as such.
>>             Once that is conceptually done, it is nearly trivial to
>>             reassign those locations to registers and
>>             then all the complexity disappears.
>>
>>             So I have told tablegen that all the data is passed on
>>             the stack and during the lowering I fix
>>             this by assigning to registers as per the ABI doc.
>>
>>             This has been my approach and you can line up what I did
>>             with the ABI document and see 1 to 1 what
>>             is going on.
>>
>>
>>
>>             Test Plan: callabi.ll
>>
>>             Reviewers: dsanders
>>
>>             Reviewed By: dsanders
>>
>>             Subscribers: jholewinski, echristo, ahatanak,
>>             llvm-commits, rfuhler
>>
>>             Differential Revision: http://reviews.llvm.org/D5714
>>
>>             Added:
>>             llvm/trunk/test/CodeGen/Mips/Fast-ISel/callabi.ll
>>             Modified:
>>             llvm/trunk/lib/Target/Mips/MipsCallingConv.td
>>             llvm/trunk/lib/Target/Mips/MipsFastISel.cpp
>>             llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
>>
>>             Modified: llvm/trunk/lib/Target/Mips/MipsCallingConv.td
>>             URL:
>>             http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsCallingConv.td?rev=221948&r1=221947&r2=221948&view=diff
>>             ==============================================================================
>>             --- llvm/trunk/lib/Target/Mips/MipsCallingConv.td (original)
>>             +++ llvm/trunk/lib/Target/Mips/MipsCallingConv.td Thu Nov
>>             13 17:37:45 2014
>>             @@ -51,6 +51,19 @@ def RetCC_F128 : CallingConv<[
>>              // Mips O32 Calling Convention
>>              //===----------------------------------------------------------------------===//
>>
>>             +def CC_MipsO32 : CallingConv<[
>>             +  // Promote i8/i16 arguments to i32.
>>             +  CCIfType<[i1, i8, i16], CCPromoteToType<i32>>,
>>             +
>>             +  // Integer values get stored in stack slots that are 4
>>             bytes in
>>             +  // size and 4-byte aligned.
>>             +  CCIfType<[i32, f32], CCAssignToStack<4, 4>>,
>>             +
>>             +  // Integer values get stored in stack slots that are 8
>>             bytes in
>>             +  // size and 8-byte aligned.
>>             +  CCIfType<[f64], CCAssignToStack<8, 8>>
>>             +]>;
>>             +
>>              // Only the return rules are defined here for O32. The
>>             rules for argument
>>              // passing are defined in MipsISelLowering.cpp.
>>              def RetCC_MipsO32 : CallingConv<[
>>
>>             Modified: llvm/trunk/lib/Target/Mips/MipsFastISel.cpp
>>             URL:
>>             http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsFastISel.cpp?rev=221948&r1=221947&r2=221948&view=diff
>>             ==============================================================================
>>             --- llvm/trunk/lib/Target/Mips/MipsFastISel.cpp (original)
>>             +++ llvm/trunk/lib/Target/Mips/MipsFastISel.cpp Thu Nov
>>             13 17:37:45 2014
>>             @@ -8,6 +8,7 @@
>>              #include "llvm/IR/GlobalVariable.h"
>>              #include "llvm/Target/TargetInstrInfo.h"
>>              #include "llvm/Target/TargetLibraryInfo.h"
>>             +#include "MipsCCState.h"
>>              #include "MipsRegisterInfo.h"
>>              #include "MipsISelLowering.h"
>>              #include "MipsMachineFunction.h"
>>             @@ -68,6 +69,8 @@ class MipsFastISel final : public FastIS
>>                // Convenience variables to avoid some queries.
>>                LLVMContext *Context;
>>
>>             +  bool fastLowerCall(CallLoweringInfo &CLI) override;
>>             +
>>                bool TargetSupported;
>>                bool UnsupportedFPMode; // To allow fast-isel to
>>             proceed and just not handle
>>                // floating point but not reject doing fast-isel in other
>>             @@ -87,17 +90,20 @@ private:
>>                bool selectIntExt(const Instruction *I);
>>
>>                // Utility helper routines.
>>             -
>>                bool isTypeLegal(Type *Ty, MVT &VT);
>>                bool isLoadTypeLegal(Type *Ty, MVT &VT);
>>                bool computeAddress(const Value *Obj, Address &Addr);
>>             +  bool computeCallAddress(const Value *V, Address &Addr);
>>
>>                // Emit helper routines.
>>                bool emitCmp(unsigned DestReg, const CmpInst *CI);
>>                bool emitLoad(MVT VT, unsigned &ResultReg, Address &Addr,
>>                              unsigned Alignment = 0);
>>             +  bool emitStore(MVT VT, unsigned SrcReg, Address Addr,
>>             +  MachineMemOperand *MMO = nullptr);
>>                bool emitStore(MVT VT, unsigned SrcReg, Address &Addr,
>>                               unsigned Alignment = 0);
>>             +  unsigned emitIntExt(MVT SrcVT, unsigned SrcReg, MVT
>>             DestVT, bool isZExt);
>>                bool emitIntExt(MVT SrcVT, unsigned SrcReg, MVT
>>             DestVT, unsigned DestReg,
>>
>>                                bool IsZExt);
>>             @@ -140,9 +146,15 @@ private:
>>                  return 0;
>>                }
>>
>>             +  // Call handling routines.
>>             +private:
>>             +  CCAssignFn *CCAssignFnForCall(CallingConv::ID CC) const;
>>             +  bool processCallArgs(CallLoweringInfo &CLI,
>>             SmallVectorImpl<MVT> &ArgVTs,
>>             +                       unsigned &NumBytes);
>>             +  bool finishCall(CallLoweringInfo &CLI, MVT RetVT,
>>             unsigned NumBytes);
>>             +
>>              public:
>>                // Backend specific FastISel code.
>>             -
>>                explicit MipsFastISel(FunctionLoweringInfo &funcInfo,
>>                                      const TargetLibraryInfo *libInfo)
>>                    : FastISel(funcInfo, libInfo),
>>             @@ -166,6 +178,28 @@ public:
>>              };
>>              } // end anonymous namespace.
>>
>>             +static bool CC_Mips(unsigned ValNo, MVT ValVT, MVT LocVT,
>>             + CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
>>             +                    CCState &State) __attribute__((unused));
>>             +
>>             +static bool CC_MipsO32_FP32(unsigned ValNo, MVT ValVT,
>>             MVT LocVT,
>>             + CCValAssign::LocInfo LocInfo,
>>             + ISD::ArgFlagsTy ArgFlags, CCState &State) {
>>             +  llvm_unreachable("should not be called");
>>             +}
>>             +
>>             +bool CC_MipsO32_FP64(unsigned ValNo, MVT ValVT, MVT LocVT,
>>             +  CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
>>             +                     CCState &State) {
>>             +  llvm_unreachable("should not be called");
>>             +}
>>             +
>>             +#include "MipsGenCallingConv.inc"
>>             +
>>             +CCAssignFn
>>             *MipsFastISel::CCAssignFnForCall(CallingConv::ID CC) const {
>>             +  return CC_MipsO32;
>>             +}
>>             +
>>              unsigned MipsFastISel::materializeInt(const Constant *C,
>>             MVT VT) {
>>                if (VT != MVT::i32 && VT != MVT::i16 && VT != MVT::i8
>>             && VT != MVT::i1)
>>                  return 0;
>>             @@ -284,6 +318,19 @@ bool MipsFastISel::computeAddress(const
>>                return Addr.getReg() != 0;
>>              }
>>
>>             +bool MipsFastISel::computeCallAddress(const Value *V,
>>             Address &Addr) {
>>             +  const GlobalValue *GV = dyn_cast<GlobalValue>(V);
>>             +  if (GV && isa<Function>(GV) &&
>>             dyn_cast<Function>(GV)->isIntrinsic())
>>             +    return false;
>>             +  if (!GV)
>>             +    return false;
>>             +  if (const GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
>>             +    Addr.setGlobalValue(GV);
>>             +    return true;
>>             +  }
>>             +  return false;
>>             +}
>>             +
>>              bool MipsFastISel::isTypeLegal(Type *Ty, MVT &VT) {
>>                EVT evt = TLI.getValueType(Ty, true);
>>                // Only handle simple types.
>>             @@ -694,6 +741,250 @@ bool
>>             MipsFastISel::selectFPToInt(const I
>>                return true;
>>              }
>>              //
>>             +bool MipsFastISel::processCallArgs(CallLoweringInfo &CLI,
>>             +  SmallVectorImpl<MVT> &OutVTs,
>>             +  unsigned &NumBytes) {
>>             +  CallingConv::ID CC = CLI.CallConv;
>>             +  SmallVector<CCValAssign, 16> ArgLocs;
>>             +  CCState CCInfo(CC, false, *FuncInfo.MF, ArgLocs,
>>             *Context);
>>             + CCInfo.AnalyzeCallOperands(OutVTs, CLI.OutFlags,
>>             CCAssignFnForCall(CC));
>>             +  // Get a count of how many bytes are to be pushed on
>>             the stack.
>>             +  NumBytes = CCInfo.getNextStackOffset();
>>             +  // This is the minimum argument area used for A0-A3.
>>             +  if (NumBytes < 16)
>>             +    NumBytes = 16;
>>             +
>>             + emitInst(Mips::ADJCALLSTACKDOWN).addImm(16);
>>             +  // Process the args.
>>             +  MVT firstMVT;
>>             +  for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
>>             +    CCValAssign &VA = ArgLocs[i];
>>             +    const Value *ArgVal = CLI.OutVals[VA.getValNo()];
>>             +    MVT ArgVT = OutVTs[VA.getValNo()];
>>             +
>>             +    if (i == 0) {
>>             +      firstMVT = ArgVT;
>>             +      if (ArgVT == MVT::f32) {
>>             + VA.convertToReg(Mips::F12);
>>             +      } else if (ArgVT == MVT::f64) {
>>             + VA.convertToReg(Mips::D6);
>>             +      }
>>             +    } else if (i == 1) {
>>             +      if ((firstMVT == MVT::f32) || (firstMVT ==
>>             MVT::f64)) {
>>             +        if (ArgVT == MVT::f32) {
>>             + VA.convertToReg(Mips::F14);
>>             +        } else if (ArgVT == MVT::f64) {
>>             + VA.convertToReg(Mips::D7);
>>             +        }
>>             +      }
>>             +    }
>>             +    if (((ArgVT == MVT::i32) || (ArgVT == MVT::f32)) &&
>>             VA.isMemLoc()) {
>>             +      switch (VA.getLocMemOffset()) {
>>             +      case 0:
>>             + VA.convertToReg(Mips::A0);
>>             +        break;
>>             +      case 4:
>>             + VA.convertToReg(Mips::A1);
>>             +        break;
>>             +      case 8:
>>             + VA.convertToReg(Mips::A2);
>>             +        break;
>>             +      case 12:
>>             + VA.convertToReg(Mips::A3);
>>             +        break;
>>             +      default:
>>             +        break;
>>             +      }
>>             +    }
>>             +    unsigned ArgReg = getRegForValue(ArgVal);
>>             +    if (!ArgReg)
>>             +      return false;
>>             +
>>             +    // Handle arg promotion: SExt, ZExt, AExt.
>>             +    switch (VA.getLocInfo()) {
>>             +    case CCValAssign::Full:
>>             +      break;
>>             +    case CCValAssign::AExt:
>>             +    case CCValAssign::SExt: {
>>             +      MVT DestVT = VA.getLocVT();
>>             +      MVT SrcVT = ArgVT;
>>             +      ArgReg = emitIntExt(SrcVT, ArgReg, DestVT,
>>             /*isZExt=*/false);
>>             +      if (!ArgReg)
>>             +        return false;
>>             +      break;
>>             +    }
>>             +    case CCValAssign::ZExt: {
>>             +      MVT DestVT = VA.getLocVT();
>>             +      MVT SrcVT = ArgVT;
>>             +      ArgReg = emitIntExt(SrcVT, ArgReg, DestVT,
>>             /*isZExt=*/true);
>>             +      if (!ArgReg)
>>             +        return false;
>>             +      break;
>>             +    }
>>             +    default:
>>             +      llvm_unreachable("Unknown arg promotion!");
>>             +    }
>>             +
>>             +    // Now copy/store arg to correct locations.
>>             +    if (VA.isRegLoc() && !VA.needsCustom()) {
>>             +      BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
>>             + TII.get(TargetOpcode::COPY),
>>             VA.getLocReg()).addReg(ArgReg);
>>             + CLI.OutRegs.push_back(VA.getLocReg());
>>             +    } else if (VA.needsCustom()) {
>>             +      llvm_unreachable("Mips does not use custom args.");
>>             +      return false;
>>             +    } else {
>>             +      //
>>             +      // FIXME: This path will currently return false.
>>             It was copied
>>             +      // from the AArch64 port and should be essentially
>>             fine for Mips too.
>>             +      // The work to finish up this path will be done in
>>             a follow-on patch.
>>             +      //
>>             +      assert(VA.isMemLoc() && "Assuming store on stack.");
>>             +      // Don't emit stores for undef values.
>>             +      if (isa<UndefValue>(ArgVal))
>>             +        continue;
>>             +
>>             +      // Need to store on the stack.
>>             +      // FIXME: This alignment is incorrect but this
>>             path is disabled
>>             +      // for now (will return false). We need to
>>             determine the right alignment
>>             +      // based on the normal alignment for the
>>             underlying machine type.
>>             +      //
>>             +      unsigned ArgSize =
>>             RoundUpToAlignment(ArgVT.getSizeInBits(), 4);
>>             +
>>             +      unsigned BEAlign = 0;
>>             +      if (ArgSize < 8 && !Subtarget->isLittle())
>>             +        BEAlign = 8 - ArgSize;
>>             +
>>             +      Address Addr;
>>             + Addr.setKind(Address::RegBase);
>>             +      Addr.setReg(Mips::SP);
>>             + Addr.setOffset(VA.getLocMemOffset() + BEAlign);
>>             +
>>             +      unsigned Alignment =
>>             DL.getABITypeAlignment(ArgVal->getType());
>>             +      MachineMemOperand *MMO =
>>             FuncInfo.MF->getMachineMemOperand(
>>             + MachinePointerInfo::getStack(Addr.getOffset()),
>>             + MachineMemOperand::MOStore, ArgVT.getStoreSize(),
>>             Alignment);
>>             +      (void)(MMO);
>>             +      // if (!emitStore(ArgVT, ArgReg, Addr, MMO))
>>             +      return false; // can't store on the stack yet.
>>             +    }
>>             +  }
>>             +
>>             +  return true;
>>             +}
>>             +
>>             +bool MipsFastISel::finishCall(CallLoweringInfo &CLI, MVT
>>             RetVT,
>>             + unsigned NumBytes) {
>>             +  CallingConv::ID CC = CLI.CallConv;
>>             + emitInst(Mips::ADJCALLSTACKUP).addImm(16);
>>             +  if (RetVT != MVT::isVoid) {
>>             +    SmallVector<CCValAssign, 16> RVLocs;
>>             +    CCState CCInfo(CC, false, *FuncInfo.MF, RVLocs,
>>             *Context);
>>             + CCInfo.AnalyzeCallResult(RetVT, RetCC_Mips);
>>             +
>>             +    // Only handle a single return value.
>>             +    if (RVLocs.size() != 1)
>>             +      return false;
>>             +    // Copy all of the result registers out of their
>>             specified physreg.
>>             +    MVT CopyVT = RVLocs[0].getValVT();
>>             +    // Special handling for extended integers.
>>             +    if (RetVT == MVT::i1 || RetVT == MVT::i8 || RetVT ==
>>             MVT::i16)
>>             +      CopyVT = MVT::i32;
>>             +
>>             +    unsigned ResultReg =
>>             createResultReg(TLI.getRegClassFor(CopyVT));
>>             +    BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
>>             + TII.get(TargetOpcode::COPY),
>>             + ResultReg).addReg(RVLocs[0].getLocReg());
>>             + CLI.InRegs.push_back(RVLocs[0].getLocReg());
>>             +
>>             +    CLI.ResultReg = ResultReg;
>>             +    CLI.NumResultRegs = 1;
>>             +  }
>>             +  return true;
>>             +}
>>             +
>>             +bool MipsFastISel::fastLowerCall(CallLoweringInfo &CLI) {
>>             +  CallingConv::ID CC = CLI.CallConv;
>>             +  bool IsTailCall = CLI.IsTailCall;
>>             +  bool IsVarArg = CLI.IsVarArg;
>>             +  const Value *Callee = CLI.Callee;
>>             +  // const char *SymName = CLI.SymName;
>>             +
>>             +  // Allow SelectionDAG isel to handle tail calls.
>>             +  if (IsTailCall)
>>             +    return false;
>>             +
>>             +  // Let SDISel handle vararg functions.
>>             +  if (IsVarArg)
>>             +    return false;
>>             +
>>             +  // FIXME: Only handle *simple* calls for now.
>>             +  MVT RetVT;
>>             +  if (CLI.RetTy->isVoidTy())
>>             +    RetVT = MVT::isVoid;
>>             +  else if (!isTypeLegal(CLI.RetTy, RetVT))
>>             +    return false;
>>             +
>>             +  for (auto Flag : CLI.OutFlags)
>>             +    if (Flag.isInReg() || Flag.isSRet() || Flag.isNest()
>>             || Flag.isByVal())
>>             +      return false;
>>             +
>>             +  // Set up the argument vectors.
>>             +  SmallVector<MVT, 16> OutVTs;
>>             + OutVTs.reserve(CLI.OutVals.size());
>>             +
>>             +  for (auto *Val : CLI.OutVals) {
>>             +    MVT VT;
>>             +    if (!isTypeLegal(Val->getType(), VT) &&
>>             +        !(VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16))
>>             +      return false;
>>             +
>>             +    // We don't handle vector parameters yet.
>>             +    if (VT.isVector() || VT.getSizeInBits() > 64)
>>             +      return false;
>>             +
>>             +    OutVTs.push_back(VT);
>>             +  }
>>             +
>>             +  Address Addr;
>>             +  if (!computeCallAddress(Callee, Addr))
>>             +    return false;
>>             +
>>             +  // Handle the arguments now that we've gotten them.
>>             +  unsigned NumBytes;
>>             +  if (!processCallArgs(CLI, OutVTs, NumBytes))
>>             +    return false;
>>             +
>>             +  // Issue the call.
>>             +  unsigned DestAddress =
>>             materializeGV(Addr.getGlobalValue(), MVT::i32);
>>             +  emitInst(TargetOpcode::COPY,
>>             Mips::T9).addReg(DestAddress);
>>             +  MachineInstrBuilder MIB =
>>             +      BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
>>             TII.get(Mips::JALR),
>>             + Mips::RA).addReg(Mips::T9);
>>             +
>>             +  // Add implicit physical register uses to the call.
>>             +  for (auto Reg : CLI.OutRegs)
>>             +    MIB.addReg(Reg, RegState::Implicit);
>>             +
>>             +  // Add a register mask with the call-preserved registers.
>>             +  // Proper defs for return values will be added by
>>             setPhysRegsDeadExcept().
>>             + MIB.addRegMask(TRI.getCallPreservedMask(CC));
>>             +
>>             +  CLI.Call = MIB;
>>             +
>>             +  // Add implicit physical register uses to the call.
>>             +  for (auto Reg : CLI.OutRegs)
>>             +    MIB.addReg(Reg, RegState::Implicit);
>>             +
>>             +  // Add a register mask with the call-preserved
>>             registers.  Proper
>>             +  // defs for return values will be added by
>>             setPhysRegsDeadExcept().
>>             + MIB.addRegMask(TRI.getCallPreservedMask(CC));
>>             +
>>             +  CLI.Call = MIB;
>>             +  // Finish off the call including any return values.
>>             +  return finishCall(CLI, RetVT, NumBytes);
>>             +}
>>             +
>>              bool MipsFastISel::selectRet(const Instruction *I) {
>>                const ReturnInst *Ret = cast<ReturnInst>(I);
>>
>>             @@ -812,6 +1103,7 @@ bool MipsFastISel::emitIntZExt(MVT SrcVT
>>                  break;
>>                case MVT::i16:
>>                  emitInst(Mips::ANDi,
>>             DestReg).addReg(SrcReg).addImm(0xffff);
>>             +    break;
>>                }
>>                return true;
>>              }
>>             @@ -822,6 +1114,13 @@ bool MipsFastISel::emitIntExt(MVT
>>             SrcVT,
>>                  return emitIntZExt(SrcVT, SrcReg, DestVT, DestReg);
>>                return emitIntSExt(SrcVT, SrcReg, DestVT, DestReg);
>>              }
>>             +
>>             +unsigned MipsFastISel::emitIntExt(MVT SrcVT, unsigned
>>             SrcReg, MVT DestVT,
>>             + bool isZExt) {
>>             +  unsigned DestReg = createResultReg(&Mips::GPR32RegClass);
>>             +  return emitIntExt(SrcVT, SrcReg, DestVT, DestReg, isZExt);
>>             +}
>>             +
>>              bool MipsFastISel::fastSelectInstruction(const
>>             Instruction *I) {
>>                if (!TargetSupported)
>>                  return false;
>>
>>             Modified: llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
>>             URL:
>>             http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp?rev=221948&r1=221947&r2=221948&view=diff
>>             ==============================================================================
>>             --- llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
>>             (original)
>>             +++ llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp Thu
>>             Nov 13 17:37:45 2014
>>             @@ -2356,6 +2356,11 @@ static bool
>>             CC_MipsO32_FP64(unsigned Val
>>                return CC_MipsO32(ValNo, ValVT, LocVT, LocInfo,
>>             ArgFlags, State, F64Regs);
>>              }
>>
>>             +static bool CC_MipsO32(unsigned ValNo, MVT ValVT,
>>             +                   MVT LocVT, CCValAssign::LocInfo LocInfo,
>>             +  ISD::ArgFlagsTy ArgFlags, CCState &State)
>>             +__attribute__((unused));
>>             +
>>              #include "MipsGenCallingConv.inc"
>>
>>              //===----------------------------------------------------------------------===//
>>
>>             Added: llvm/trunk/test/CodeGen/Mips/Fast-ISel/callabi.ll
>>             URL:
>>             http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/Fast-ISel/callabi.ll?rev=221948&view=auto
>>             ==============================================================================
>>             --- llvm/trunk/test/CodeGen/Mips/Fast-ISel/callabi.ll (added)
>>             +++ llvm/trunk/test/CodeGen/Mips/Fast-ISel/callabi.ll Thu
>>             Nov 13 17:37:45 2014
>>             @@ -0,0 +1,477 @@
>>             +; RUN: llc -march=mipsel -relocation-model=pic -O0
>>             -mips-fast-isel -fast-isel-abort -mcpu=mips32r2 \
>>             +; RUN:     < %s | FileCheck %s
>>             +; RUN: llc -march=mipsel -relocation-model=pic -O0
>>             -mips-fast-isel -fast-isel-abort -mcpu=mips32 \
>>             +; RUN:     < %s | FileCheck %s
>>             +; RUN: llc -march=mipsel -relocation-model=pic -O0
>>             -mips-fast-isel -fast-isel-abort -mcpu=mips32r2 \
>>             +; RUN:     < %s | FileCheck %s -check-prefix=mips32r2
>>             +; RUN: llc -march=mipsel -relocation-model=pic -O0
>>             -mips-fast-isel -fast-isel-abort -mcpu=mips32 \
>>             +; RUN:     < %s | FileCheck %s -check-prefix=mips32
>>             +; RUN: llc -march=mipsel -relocation-model=pic -O0
>>             -mips-fast-isel -fast-isel-abort -mcpu=mips32r2 \
>>             +; RUN:     < %s | FileCheck %s -check-prefix=CHECK2
>>             +; RUN: llc -march=mipsel -relocation-model=pic -O0
>>             -mips-fast-isel -fast-isel-abort -mcpu=mips32 \
>>             +; RUN:     < %s | FileCheck %s -check-prefix=CHECK2
>>             +
>>             +
>>             + at c1 = global i8 -45, align 1
>>             + at uc1 = global i8 27, align 1
>>             + at s1 = global i16 -1789, align 2
>>             + at us1 = global i16 1256, align 2
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxi() #0 {
>>             +entry:
>>             +; CHECK-LABEL:  cxi
>>             +  call void @xi(i32 10)
>>             +; CHECK-DAG:    addiu   $4, $zero, 10
>>             +; CHECK-DAG:    lw      $25, %got(xi)(${{[0-9]+}})
>>             +; CHECK:        jalr    $25
>>             +
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xi(i32) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxii() #0 {
>>             +entry:
>>             +; CHECK-LABEL:  cxii
>>             +  call void @xii(i32 746, i32 892)
>>             +; CHECK-DAG:    addiu   $4, $zero, 746
>>             +; CHECK-DAG:    addiu   $5, $zero, 892
>>             +; CHECK-DAG:    lw      $25, %got(xii)(${{[0-9]+}})
>>             +; CHECK:        jalr    $25
>>             +
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xii(i32, i32) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxiii() #0 {
>>             +entry:
>>             +; CHECK-LABEL:  cxiii
>>             +  call void @xiii(i32 88, i32 44, i32 11)
>>             +; CHECK-DAG:    addiu   $4, $zero, 88
>>             +; CHECK-DAG:    addiu   $5, $zero, 44
>>             +; CHECK-DAG:    addiu   $6, $zero, 11
>>             +; CHECK-DAG:    lw      $25, %got(xiii)(${{[0-9]+}})
>>             +; CHECK:        jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xiii(i32, i32, i32) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxiiii() #0 {
>>             +entry:
>>             +; CHECK-LABEL:  cxiiii
>>             +  call void @xiiii(i32 167, i32 320, i32 97, i32 14)
>>             +; CHECK-DAG:    addiu   $4, $zero, 167
>>             +; CHECK-DAG:    addiu   $5, $zero, 320
>>             +; CHECK-DAG:    addiu   $6, $zero, 97
>>             +; CHECK-DAG:    addiu   $7, $zero, 14
>>             +; CHECK-DAG:    lw      $25, %got(xiiii)(${{[0-9]+}})
>>             +; CHECK:        jalr    $25
>>             +
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xiiii(i32, i32, i32, i32) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxiiiiconv() #0 {
>>             +entry:
>>             +; CHECK-LABEL: cxiiiiconv
>>             +; mips32r2-LABEL:  cxiiiiconv
>>             +; mips32-LABEL:  cxiiiiconv
>>             +  %0 = load i8* @c1, align 1
>>             +  %conv = sext i8 %0 to i32
>>             +  %1 = load i8* @uc1, align 1
>>             +  %conv1 = zext i8 %1 to i32
>>             +  %2 = load i16* @s1, align 2
>>             +  %conv2 = sext i16 %2 to i32
>>             +  %3 = load i16* @us1, align 2
>>             +  %conv3 = zext i16 %3 to i32
>>             +  call void @xiiii(i32 %conv, i32 %conv1, i32 %conv2,
>>             i32 %conv3)
>>             +; CHECK:        addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; mips32r2:     addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; mips32:       addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; mips32r2-DAG:         lw $[[REG_C1_ADDR:[0-9]+]],
>>             %got(c1)($[[REG_GP]])
>>             +; mips32r2-DAG: lbu  $[[REG_C1:[0-9]+]], 0($[[REG_C1_ADDR]])
>>             +; mips32r2-DAG  seb     $3, $[[REG_C1]]
>>             +; mips32-DAG:   lw $[[REG_C1_ADDR:[0-9]+]],
>>             %got(c1)($[[REG_GP]])
>>             +; mips32-DAG:   lbu  $[[REG_C1:[0-9]+]], 0($[[REG_C1_ADDR]])
>>             +; mips32-DAG:   sll  $[[REG_C1_1:[0-9]+]], $[[REG_C1]], 24
>>             +; mips32-DAG:   sra     $4, $[[REG_C1_1]], 24
>>             +; CHECK-DAG:    lw $[[REG_UC1_ADDR:[0-9]+]],
>>             %got(uc1)($[[REG_GP]])
>>             +; CHECK-DAG:    lbu  $[[REG_UC1:[0-9]+]],
>>             0($[[REG_UC1_ADDR]])
>>             +; FIXME andi is superfulous
>>             +; CHECK-DAG:    andi    $5, $[[REG_UC1]], 255
>>             +; mips32r2-DAG:         lw $[[REG_S1_ADDR:[0-9]+]],
>>             %got(s1)($[[REG_GP]])
>>             +; mips32r2-DAG: lhu  $[[REG_S1:[0-9]+]], 0($[[REG_S1_ADDR]])
>>             +; mips32r2-DAG: seh     $6, $[[REG_S1]]
>>             +; mips32-DAG:   lw $[[REG_S1_ADDR:[0-9]+]],
>>             %got(s1)($[[REG_GP]])
>>             +; mips32-DAG:   lhu  $[[REG_S1:[0-9]+]], 0($[[REG_S1_ADDR]])
>>             +; mips32-DAG:   sll  $[[REG_S1_1:[0-9]+]], $[[REG_S1]], 16
>>             +; mips32-DAG:   sra     $6, $[[REG_S1_1]], 16
>>             +; CHECK-DAG:    lw $[[REG_US1_ADDR:[0-9]+]],
>>             %got(us1)($[[REG_GP]])
>>             +; CHECK-DAG:    lhu  $[[REG_US1:[0-9]+]],
>>             0($[[REG_US1_ADDR]])
>>             +; FIXME andi is superfulous
>>             +; CHECK-DAG:    andi    $7, $[[REG_US1]], 65535
>>             +; mips32r2:     jalr    $25
>>             +; mips32r2:     jalr    $25
>>             +; CHECK:        jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxf() #0 {
>>             +entry:
>>             +; CHECK-LABEL:  cxf
>>             +  call void @xf(float 0x40BBC85560000000)
>>             +; CHECK:        addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK:        lui  $[[REG_FPCONST_1:[0-9]+]], 17886
>>             +; CHECK:        ori  $[[REG_FPCONST:[0-9]+]],
>>             $[[REG_FPCONST_1]], 17067
>>             +; CHECK: mtc1   $[[REG_FPCONST]], $f12
>>             +; CHECK:        lw      $25, %got(xf)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xf(float) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxff() #0 {
>>             +entry:
>>             +; CHECK-LABEL:  cxff
>>             +  call void @xff(float 0x3FF74A6CA0000000, float
>>             0x401A2C0840000000)
>>             +; CHECK:        addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    lui  $[[REG_FPCONST_1:[0-9]+]], 16314
>>             +; CHECK-DAG:    ori  $[[REG_FPCONST:[0-9]+]],
>>             $[[REG_FPCONST_1]], 21349
>>             +; CHECK-DAG: mtc1  $[[REG_FPCONST]], $f12
>>             +; CHECK-DAG:    lui  $[[REG_FPCONST_2:[0-9]+]], 16593
>>             +; CHECK-DAG:    ori  $[[REG_FPCONST_3:[0-9]+]],
>>             $[[REG_FPCONST_2]], 24642
>>             +; CHECK-DAG: mtc1  $[[REG_FPCONST_3]], $f14
>>             +; CHECK:        lw      $25, %got(xff)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xff(float, float) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxfi() #0 {
>>             +entry:
>>             +; CHECK-LABEL: cxfi
>>             +  call void @xfi(float 0x4013906240000000, i32 102)
>>             +; CHECK:        addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    lui  $[[REG_FPCONST_1:[0-9]+]], 16540
>>             +; CHECK-DAG:    ori  $[[REG_FPCONST:[0-9]+]],
>>             $[[REG_FPCONST_1]], 33554
>>             +; CHECK-DAG: mtc1  $[[REG_FPCONST]], $f12
>>             +; CHECK-DAG:    addiu   $5, $zero, 102
>>             +; CHECK:        lw      $25, %got(xfi)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xfi(float, i32) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxfii() #0 {
>>             +entry:
>>             +; CHECK-LABEL: cxfii
>>             +  call void @xfii(float 0x405EC7EE00000000, i32 9993,
>>             i32 10922)
>>             +; CHECK:        addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    lui  $[[REG_FPCONST_1:[0-9]+]], 17142
>>             +; CHECK-DAG:    ori  $[[REG_FPCONST:[0-9]+]],
>>             $[[REG_FPCONST_1]], 16240
>>             +; CHECK-DAG: mtc1  $[[REG_FPCONST]], $f12
>>             +; CHECK-DAG:    addiu   $5, $zero, 9993
>>             +; CHECK-DAG:    addiu   $6, $zero, 10922
>>             +; CHECK:        lw      $25, %got(xfii)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xfii(float, i32, i32) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxfiii() #0 {
>>             +entry:
>>             +; CHECK-LABEL: cxfiii
>>             +  call void @xfiii(float 0x405C072B20000000, i32 3948,
>>             i32 89011, i32 111222)
>>             +; CHECK:        addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    lui  $[[REG_FPCONST_1:[0-9]+]], 17120
>>             +; CHECK-DAG:    ori  $[[REG_FPCONST:[0-9]+]],
>>             $[[REG_FPCONST_1]], 14681
>>             +; CHECK-DAG: mtc1  $[[REG_FPCONST]], $f12
>>             +; CHECK-DAG:    addiu   $5, $zero, 3948
>>             +; CHECK-DAG:    lui  $[[REG_I_1:[0-9]+]], 1
>>             +; CHECK-DAG:    ori     $6, $[[REG_I_1]], 23475
>>             +; CHECK-DAG:    lui  $[[REG_I_2:[0-9]+]], 1
>>             +; CHECK-DAG:    ori     $7, $[[REG_I_2]], 45686
>>             +; CHECK:        lw      $25, %got(xfiii)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xfiii(float, i32, i32, i32) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxd() #0 {
>>             +entry:
>>             +; mips32r2-LABEL: cxd:
>>             +; mips32-LABEL: cxd:
>>             +  call void @xd(double 5.994560e+02)
>>             +; mips32:       addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; mips32-DAG:   lui  $[[REG_FPCONST_1:[0-9]+]], 16514
>>             +; mips32-DAG:   ori  $[[REG_FPCONST_2:[0-9]+]],
>>             $[[REG_FPCONST_1]], 48037
>>             +; mips32-DAG:   lui  $[[REG_FPCONST_3:[0-9]+]], 58195
>>             +; mips32-DAG:   ori  $[[REG_FPCONST_4:[0-9]+]],
>>             $[[REG_FPCONST_3]], 63439
>>             +; mips32-DAG:    mtc1  $[[REG_FPCONST_4]], $f12
>>             +; mips32-DAG:       mtc1 $[[REG_FPCONST_2]], $f13
>>             +; mips32-DAG:   lw      $25, %got(xd)($[[REG_GP]])
>>             +; mips32:       jalr    $25
>>             +; mips32r2:     addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; mips32r2-DAG: lui  $[[REG_FPCONST_1:[0-9]+]], 16514
>>             +; mips32r2-DAG: ori  $[[REG_FPCONST_2:[0-9]+]],
>>             $[[REG_FPCONST_1]], 48037
>>             +; mips32r2-DAG: lui  $[[REG_FPCONST_3:[0-9]+]], 58195
>>             +; mips32r2-DAG: ori  $[[REG_FPCONST_4:[0-9]+]],
>>             $[[REG_FPCONST_3]], 63439
>>             +; mips32r2-DAG: mtc1 $[[REG_FPCONST_4]], $f12
>>             +; mips32r2-DAG: mthc1  $[[REG_FPCONST_2]], $f12
>>             +; mips32r2-DAG: lw      $25, %got(xd)($[[REG_GP]])
>>             +; mips32r2 :    jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xd(double) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxdd() #0 {
>>             +; mips32r2-LABEL: cxdd:
>>             +; mips32-LABEL: cxdd:
>>             +entry:
>>             +  call void @xdd(double 1.234980e+03, double
>>             0x40F5B331F7CED917)
>>             +; mips32:       addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; mips32-DAG:   lui  $[[REG_FPCONST_1:[0-9]+]], 16531
>>             +; mips32-DAG:   ori  $[[REG_FPCONST_2:[0-9]+]],
>>             $[[REG_FPCONST_1]], 19435
>>             +; mips32-DAG:   lui  $[[REG_FPCONST_3:[0-9]+]], 34078
>>             +; mips32-DAG:   ori  $[[REG_FPCONST_4:[0-9]+]],
>>             $[[REG_FPCONST_3]], 47186
>>             +; mips32-DAG:   mtc1 $[[REG_FPCONST_4]], $f12
>>             +; mips32-DAG:   mtc1 $[[REG_FPCONST_2]], $f13
>>             +; mips32-DAG:   lui  $[[REG_FPCONST_1:[0-9]+]], 16629
>>             +; mips32-DAG:   ori  $[[REG_FPCONST_2:[0-9]+]],
>>             $[[REG_FPCONST_1]], 45873
>>             +; mips32-DAG:   lui  $[[REG_FPCONST_3:[0-9]+]], 63438
>>             +; mips32-DAG:   ori  $[[REG_FPCONST_4:[0-9]+]],
>>             $[[REG_FPCONST_3]], 55575
>>             +; mips32-DAG:   mtc1 $[[REG_FPCONST_4]], $f14
>>             +; mips32-DAG:   mtc1 $[[REG_FPCONST_2]], $f15
>>             +; mips32-DAG:   lw      $25, %got(xdd)($[[REG_GP]])
>>             +; mips32:       jalr    $25
>>             +; mips32r2:     addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; mips32r2-DAG: lui  $[[REG_FPCONST_1:[0-9]+]], 16531
>>             +; mips32r2-DAG: ori  $[[REG_FPCONST_2:[0-9]+]],
>>             $[[REG_FPCONST_1]], 19435
>>             +; mips32r2-DAG: lui  $[[REG_FPCONST_3:[0-9]+]], 34078
>>             +; mips32r2-DAG: ori  $[[REG_FPCONST_4:[0-9]+]],
>>             $[[REG_FPCONST_3]], 47186
>>             +; mips32r2-DAG: mtc1 $[[REG_FPCONST_4]], $f12
>>             +; mips32r2-DAG: mthc1  $[[REG_FPCONST_2]], $f12
>>             +; mips32r2-DAG: lui  $[[REG_FPCONST_1:[0-9]+]], 16629
>>             +; mips32r2-DAG: ori  $[[REG_FPCONST_2:[0-9]+]],
>>             $[[REG_FPCONST_1]], 45873
>>             +; mips32r2-DAG: lui  $[[REG_FPCONST_3:[0-9]+]], 63438
>>             +; mips32r2-DAG: ori  $[[REG_FPCONST_4:[0-9]+]],
>>             $[[REG_FPCONST_3]], 55575
>>             +; mips32r2-DAG: mtc1 $[[REG_FPCONST_4]], $f14
>>             +; mips32r2-DAG: mthc1  $[[REG_FPCONST_2]], $f14
>>             +; mips32r2-DAG: lw      $25, %got(xdd)($[[REG_GP]])
>>             +; mips32r2 :    jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xdd(double, double) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxif() #0 {
>>             +entry:
>>             +; CHECK-LABEL: cxif:
>>             +  call void @xif(i32 345, float 0x407BCE5A20000000)
>>             +; CHECK-DAG:    addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    addiu   $4, $zero, 345
>>             +; CHECK-DAG:    lui  $[[REGF_1:[0-9]+]], 17374
>>             +; CHECK-DAG:    ori  $[[REGF_2:[0-9]+]], $[[REGF_1]], 29393
>>             +; CHECK-DAG:    mtc1 $[[REGF_2]], $f[[REGF_3:[0-9]+]]
>>             +; CHECK-DAG:    mfc1    $5, $f[[REGF_3]]
>>             +; CHECK-DAG:    lw      $25, %got(xif)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xif(i32, float) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxiff() #0 {
>>             +entry:
>>             +; CHECK-LABEL: cxiff:
>>             +; CHECK2-LABEL: cxiff:
>>             +  call void @xiff(i32 12239, float 0x408EDB3340000000,
>>             float 0x4013FFE5C0000000)
>>             +; We need to do the two floating point parameters in a
>>             separate
>>             +; check because we can't control the ordering of parts
>>             of the sequence
>>             +;;
>>             +; CHECK:        addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK:        addiu   $4, $zero, 12239
>>             +; CHECK2:       addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK2:       addiu   $4, $zero, 12239
>>             +; CHECK:        lui  $[[REGF_1:[0-9]+]], 17526
>>             +; CHECK:        ori  $[[REGF_2:[0-9]+]], $[[REGF_1]], 55706
>>             +; CHECK:        mtc1 $[[REGF_2]], $f[[REGF_3:[0-9]+]]
>>             +; CHECK:        mfc1    $5, $f[[REGF_3]]
>>             +; CHECK2:       lui  $[[REGF2_1:[0-9]+]], 16543
>>             +; CHECK2:       ori  $[[REGF2_2:[0-9]+]], $[[REGF2_1]],
>>             65326
>>             +; CHECK2:       mtc1 $[[REGF2_2]], $f[[REGF2_3:[0-9]+]]
>>             +; CHECK2:       mfc1    $6, $f[[REGF2_3]]
>>             +; CHECK:        lw      $25, %got(xiff)($[[REG_GP]])
>>             +; CHECK2:       lw      $25, %got(xiff)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +; CHECK2:       jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xiff(i32, float, float) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxifi() #0 {
>>             +entry:
>>             +; CHECK: cxifi:
>>             +  call void @xifi(i32 887, float 0x402277CEE0000000, i32
>>             888)
>>             +; CHECK-DAG:    addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    addiu   $4, $zero, 887
>>             +; CHECK-DAG:    lui  $[[REGF_1:[0-9]+]], 16659
>>             +; CHECK-DAG:    ori  $[[REGF_2:[0-9]+]], $[[REGF_1]], 48759
>>             +; CHECK-DAG:    mtc1 $[[REGF_2]], $f[[REGF_3:[0-9]+]]
>>             +; CHECK-DAG:    mfc1    $5, $f[[REGF_3]]
>>             +; CHECk-DAG:    addiu   $6, $zero, 888
>>             +; CHECK-DAG:    lw      $25, %got(xifi)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xifi(i32, float, i32) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxifif() #0 {
>>             +entry:
>>             +; CHECK: cxifif:
>>             +; CHECK2: cxifif:
>>             +  call void @xifif(i32 67774, float 0x408EE0FBE0000000,
>>             i32 9991, float 0x40B15C8CC0000000)
>>             +; CHECK-DAG:    addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    lui  $[[REGI:[0-9]+]], 1
>>             +; CHECK-DAG:    ori     $4, $[[REGI]], 2238
>>             +; CHECK-DAG:    lui  $[[REGF_1:[0-9]+]], 17527
>>             +; CHECK-DAG:    ori  $[[REGF_2:[0-9]+]], $[[REGF_1]], 2015
>>             +; CHECK-DAG:    mtc1 $[[REGF_2]], $f[[REGF_3:[0-9]+]]
>>             +; CHECK-DAG:    mfc1    $5, $f[[REGF_3]]
>>             +; CHECk-DAG:    addiu   $6, $zero, 888
>>             +; CHECK2:       lui  $[[REGF2_1:[0-9]+]], 17802
>>             +; CHECK2:       ori  $[[REGF2_2:[0-9]+]], $[[REGF2_1]],
>>             58470
>>             +; CHECK2:       mtc1 $[[REGF2_2]], $f[[REGF2_3:[0-9]+]]
>>             +; CHECK2:       mfc1    $7, $f[[REGF2_3]]
>>             +; CHECK:        lw      $25, %got(xifif)($[[REG_GP]])
>>             +; CHECK2:       lw      $25, %got(xifif)($[[REG_GP]])
>>             +; CHECK2:       jalr    $25
>>             +; CHECK:        jalr    $25
>>             +
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xifif(i32, float, i32, float) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxiffi() #0 {
>>             +entry:
>>             +; CHECK-label: cxiffi:
>>             +; CHECK2-label: cxiffi:
>>             +  call void @xiffi(i32 45, float 0x3FF6666660000000,
>>             float 0x408F333340000000, i32 234)
>>             +; CHECK-DAG:    addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    addiu   $4, $zero, 45
>>             +; CHECK2-DAG:   addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK2-DAG:   addiu   $4, $zero, 45
>>             +; CHECK-DAG:    lui  $[[REGF_1:[0-9]+]], 16307
>>             +; CHECK-DAG:    ori  $[[REGF_2:[0-9]+]], $[[REGF_1]], 13107
>>             +; CHECK-DAG:    mtc1 $[[REGF_2]], $f[[REGF_3:[0-9]+]]
>>             +; CHECK-DAG:    mfc1    $5, $f[[REGF_3]]
>>             +; CHECK2:       lui  $[[REGF2_1:[0-9]+]], 17529
>>             +; CHECK2:       ori  $[[REGF2_2:[0-9]+]], $[[REGF2_1]],
>>             39322
>>             +; CHECK2:       mtc1 $[[REGF2_2]], $f[[REGF2_3:[0-9]+]]
>>             +; CHECK2:       mfc1    $6, $f[[REGF2_3]]
>>             +; CHECK-DAG:    lw      $25, %got(xiffi)($[[REG_GP]])
>>             +; CHECK-DAG:    addiu   $7, $zero, 234
>>             +; CHECK2-DAG:   lw      $25, %got(xiffi)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +; CHECK2:       jalr    $25
>>             +
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xiffi(i32, float, float, i32) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @cxifii() #0 {
>>             +entry:
>>             +; CHECK-DAG:    cxifii:
>>             +  call void @xifii(i32 12239, float 0x408EDB3340000000,
>>             i32 998877, i32 1234)
>>             +; CHECK-DAG:    addu $[[REG_GP:[0-9]+]], ${{[0-9]+}},
>>             ${{[0-9+]}}
>>             +; CHECK-DAG:    addiu   $4, $zero, 12239
>>             +; CHECK-DAG:    lui  $[[REGF_1:[0-9]+]], 17526
>>             +; CHECK-DAG:    ori  $[[REGF_2:[0-9]+]], $[[REGF_1]], 55706
>>             +; CHECK-DAG:    mtc1 $[[REGF_2]], $f[[REGF_3:[0-9]+]]
>>             +; CHECK-DAG:    mfc1    $5, $f[[REGF_3]]
>>             +; CHECK-DAG:    lui  $[[REGI2:[0-9]+]], 15
>>             +; CHECK-DAG:    ori     $6, $[[REGI2]], 15837
>>             +; CHECk-DAG:    addiu   $7, $zero, 1234
>>             +; CHECK-DAG:    lw      $25, %got(xifii)($[[REG_GP]])
>>             +; CHECK:        jalr    $25
>>             +  ret void
>>             +}
>>             +
>>             +declare void @xifii(i32, float, i32, i32) #1
>>             +
>>             +; FIXME: this function will not pass yet.
>>             +; Function Attrs: nounwind
>>             +; define void @cxfid() #0 {
>>             +;entry:
>>             +;  call void @xfid(float 0x4013B851E0000000, i32 811123,
>>             double 0x40934BFF487FCB92)
>>             +;  ret void
>>             +;}
>>             +
>>             +declare void @xfid(float, i32, double) #1
>>             +
>>             +; Function Attrs: nounwind
>>             +define void @g() #0 {
>>             +entry:
>>             +  call void @cxi()
>>             +  call void @cxii()
>>             +  call void @cxiii()
>>             +  call void @cxiiii()
>>             +  call void @cxiiiiconv()
>>             +  call void @cxf()
>>             +  call void @cxff()
>>             +  call void @cxd()
>>             +  call void @cxfi()
>>             +  call void @cxfii()
>>             +  call void @cxfiii()
>>             +  call void @cxdd()
>>             +  call void @cxif()
>>             +  call void @cxiff()
>>             +  call void @cxifi()
>>             +  call void @cxifii()
>>             +  call void @cxifif()
>>             +  call void @cxiffi()
>>             +  ret void
>>             +}
>>             +
>>             +
>>             +attributes #0 = { nounwind "less-precise-fpmad"="false"
>>             "no-frame-pointer-elim"="true"
>>             "no-frame-pointer-elim-non-leaf"
>>             "no-infs-fp-math"="false" "no-nans-fp-math"="false"
>>             "stack-protector-buffer-size"="8"
>>             "unsafe-fp-math"="false" "use-soft-float"="false" }
>>             +attributes #1 = { "less-precise-fpmad"="false"
>>             "no-frame-pointer-elim"="true"
>>             "no-frame-pointer-elim-non-leaf"
>>             "no-infs-fp-math"="false" "no-nans-fp-math"="false"
>>             "stack-protector-buffer-size"="8"
>>             "unsafe-fp-math"="false" "use-soft-float"="false" }
>>             +
>>             +!llvm.ident = !{!0}
>>             +
>>             +!0 = metadata !{metadata !"clang version 3.6.0
>>             (gitosis at dmz-portal.mips.com:clang
>>             <mailto:gitosis at dmz-portal.mips.com:clang>
>>             43992fe7b17de5553ac06d323cb80cc6723a9ae3)
>>             (gitosis at dmz-portal.mips.com:llvm.git
>>             <mailto:gitosis at dmz-portal.mips.com:llvm.git>
>>             0834e6839eb170197c81bb02e916258d1527e312)"}
>>
>>
>>             _______________________________________________
>>             llvm-commits mailing list
>>             llvm-commits at cs.uiuc.edu <mailto:llvm-commits at cs.uiuc.edu>
>>             http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
>>
>>
>>
>>         _______________________________________________
>>         llvm-commits mailing list
>>         llvm-commits at cs.uiuc.edu <mailto:llvm-commits at cs.uiuc.edu>
>>         http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
>>
>>
>
>

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