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diff --git a/contrib/llvm/lib/Target/Alpha/AlphaISelLowering.cpp b/contrib/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
new file mode 100644
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+++ b/contrib/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
@@ -0,0 +1,934 @@
+//===-- AlphaISelLowering.cpp - Alpha DAG Lowering Implementation ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the AlphaISelLowering class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "AlphaISelLowering.h"
+#include "AlphaTargetMachine.h"
+#include "AlphaMachineFunctionInfo.h"
+#include "llvm/CodeGen/CallingConvLower.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/SelectionDAG.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/PseudoSourceValue.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/Constants.h"
+#include "llvm/Function.h"
+#include "llvm/Module.h"
+#include "llvm/Intrinsics.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+/// AddLiveIn - This helper function adds the specified physical register to the
+/// MachineFunction as a live in value. It also creates a corresponding virtual
+/// register for it.
+static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
+ TargetRegisterClass *RC) {
+ assert(RC->contains(PReg) && "Not the correct regclass!");
+ unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
+ MF.getRegInfo().addLiveIn(PReg, VReg);
+ return VReg;
+}
+
+AlphaTargetLowering::AlphaTargetLowering(TargetMachine &TM)
+ : TargetLowering(TM, new TargetLoweringObjectFileELF()) {
+ // Set up the TargetLowering object.
+ //I am having problems with shr n i8 1
+ setShiftAmountType(MVT::i64);
+ setBooleanContents(ZeroOrOneBooleanContent);
+
+ addRegisterClass(MVT::i64, Alpha::GPRCRegisterClass);
+ addRegisterClass(MVT::f64, Alpha::F8RCRegisterClass);
+ addRegisterClass(MVT::f32, Alpha::F4RCRegisterClass);
+
+ // We want to custom lower some of our intrinsics.
+ setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
+
+ setLoadExtAction(ISD::EXTLOAD, MVT::i1, Promote);
+ setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
+
+ setLoadExtAction(ISD::ZEXTLOAD, MVT::i1, Promote);
+ setLoadExtAction(ISD::ZEXTLOAD, MVT::i32, Expand);
+
+ setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
+ setLoadExtAction(ISD::SEXTLOAD, MVT::i8, Expand);
+ setLoadExtAction(ISD::SEXTLOAD, MVT::i16, Expand);
+
+ setTruncStoreAction(MVT::f64, MVT::f32, Expand);
+
+ // setOperationAction(ISD::BRIND, MVT::Other, Expand);
+ setOperationAction(ISD::BR_JT, MVT::Other, Expand);
+ setOperationAction(ISD::BR_CC, MVT::Other, Expand);
+ setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
+
+ setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
+
+ setOperationAction(ISD::FREM, MVT::f32, Expand);
+ setOperationAction(ISD::FREM, MVT::f64, Expand);
+
+ setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
+ setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
+ setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
+ setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
+
+ if (!TM.getSubtarget<AlphaSubtarget>().hasCT()) {
+ setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
+ setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
+ setOperationAction(ISD::CTLZ , MVT::i64 , Expand);
+ }
+ setOperationAction(ISD::BSWAP , MVT::i64, Expand);
+ setOperationAction(ISD::ROTL , MVT::i64, Expand);
+ setOperationAction(ISD::ROTR , MVT::i64, Expand);
+
+ setOperationAction(ISD::SREM , MVT::i64, Custom);
+ setOperationAction(ISD::UREM , MVT::i64, Custom);
+ setOperationAction(ISD::SDIV , MVT::i64, Custom);
+ setOperationAction(ISD::UDIV , MVT::i64, Custom);
+
+ setOperationAction(ISD::ADDC , MVT::i64, Expand);
+ setOperationAction(ISD::ADDE , MVT::i64, Expand);
+ setOperationAction(ISD::SUBC , MVT::i64, Expand);
+ setOperationAction(ISD::SUBE , MVT::i64, Expand);
+
+ setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
+ setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
+
+ setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom);
+ setOperationAction(ISD::SRA_PARTS, MVT::i64, Expand);
+ setOperationAction(ISD::SHL_PARTS, MVT::i64, Expand);
+
+ // We don't support sin/cos/sqrt/pow
+ setOperationAction(ISD::FSIN , MVT::f64, Expand);
+ setOperationAction(ISD::FCOS , MVT::f64, Expand);
+ setOperationAction(ISD::FSIN , MVT::f32, Expand);
+ setOperationAction(ISD::FCOS , MVT::f32, Expand);
+
+ setOperationAction(ISD::FSQRT, MVT::f64, Expand);
+ setOperationAction(ISD::FSQRT, MVT::f32, Expand);
+
+ setOperationAction(ISD::FPOW , MVT::f32, Expand);
+ setOperationAction(ISD::FPOW , MVT::f64, Expand);
+
+ setOperationAction(ISD::SETCC, MVT::f32, Promote);
+
+ setOperationAction(ISD::BIT_CONVERT, MVT::f32, Promote);
+
+ setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
+
+ // Not implemented yet.
+ setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
+ setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
+ setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
+
+ // We want to legalize GlobalAddress and ConstantPool and
+ // ExternalSymbols nodes into the appropriate instructions to
+ // materialize the address.
+ setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
+ setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
+ setOperationAction(ISD::ExternalSymbol, MVT::i64, Custom);
+ setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
+
+ setOperationAction(ISD::VASTART, MVT::Other, Custom);
+ setOperationAction(ISD::VAEND, MVT::Other, Expand);
+ setOperationAction(ISD::VACOPY, MVT::Other, Custom);
+ setOperationAction(ISD::VAARG, MVT::Other, Custom);
+ setOperationAction(ISD::VAARG, MVT::i32, Custom);
+
+ setOperationAction(ISD::JumpTable, MVT::i64, Custom);
+ setOperationAction(ISD::JumpTable, MVT::i32, Custom);
+
+ setStackPointerRegisterToSaveRestore(Alpha::R30);
+
+ setJumpBufSize(272);
+ setJumpBufAlignment(16);
+
+ computeRegisterProperties();
+}
+
+MVT::SimpleValueType AlphaTargetLowering::getSetCCResultType(EVT VT) const {
+ return MVT::i64;
+}
+
+const char *AlphaTargetLowering::getTargetNodeName(unsigned Opcode) const {
+ switch (Opcode) {
+ default: return 0;
+ case AlphaISD::CVTQT_: return "Alpha::CVTQT_";
+ case AlphaISD::CVTQS_: return "Alpha::CVTQS_";
+ case AlphaISD::CVTTQ_: return "Alpha::CVTTQ_";
+ case AlphaISD::GPRelHi: return "Alpha::GPRelHi";
+ case AlphaISD::GPRelLo: return "Alpha::GPRelLo";
+ case AlphaISD::RelLit: return "Alpha::RelLit";
+ case AlphaISD::GlobalRetAddr: return "Alpha::GlobalRetAddr";
+ case AlphaISD::CALL: return "Alpha::CALL";
+ case AlphaISD::DivCall: return "Alpha::DivCall";
+ case AlphaISD::RET_FLAG: return "Alpha::RET_FLAG";
+ case AlphaISD::COND_BRANCH_I: return "Alpha::COND_BRANCH_I";
+ case AlphaISD::COND_BRANCH_F: return "Alpha::COND_BRANCH_F";
+ }
+}
+
+/// getFunctionAlignment - Return the Log2 alignment of this function.
+unsigned AlphaTargetLowering::getFunctionAlignment(const Function *F) const {
+ return 4;
+}
+
+static SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) {
+ EVT PtrVT = Op.getValueType();
+ JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
+ SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
+ // FIXME there isn't really any debug info here
+ DebugLoc dl = Op.getDebugLoc();
+
+ SDValue Hi = DAG.getNode(AlphaISD::GPRelHi, dl, MVT::i64, JTI,
+ DAG.getGLOBAL_OFFSET_TABLE(MVT::i64));
+ SDValue Lo = DAG.getNode(AlphaISD::GPRelLo, dl, MVT::i64, JTI, Hi);
+ return Lo;
+}
+
+//http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/
+//AA-PY8AC-TET1_html/callCH3.html#BLOCK21
+
+//For now, just use variable size stack frame format
+
+//In a standard call, the first six items are passed in registers $16
+//- $21 and/or registers $f16 - $f21. (See Section 4.1.2 for details
+//of argument-to-register correspondence.) The remaining items are
+//collected in a memory argument list that is a naturally aligned
+//array of quadwords. In a standard call, this list, if present, must
+//be passed at 0(SP).
+//7 ... n 0(SP) ... (n-7)*8(SP)
+
+// //#define FP $15
+// //#define RA $26
+// //#define PV $27
+// //#define GP $29
+// //#define SP $30
+
+#include "AlphaGenCallingConv.inc"
+
+SDValue
+AlphaTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
+ CallingConv::ID CallConv, bool isVarArg,
+ bool &isTailCall,
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ const SmallVectorImpl<ISD::InputArg> &Ins,
+ DebugLoc dl, SelectionDAG &DAG,
+ SmallVectorImpl<SDValue> &InVals) const {
+ // Alpha target does not yet support tail call optimization.
+ isTailCall = false;
+
+ // Analyze operands of the call, assigning locations to each operand.
+ SmallVector<CCValAssign, 16> ArgLocs;
+ CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
+ ArgLocs, *DAG.getContext());
+
+ CCInfo.AnalyzeCallOperands(Outs, CC_Alpha);
+
+ // Get a count of how many bytes are to be pushed on the stack.
+ unsigned NumBytes = CCInfo.getNextStackOffset();
+
+ Chain = DAG.getCALLSEQ_START(Chain, DAG.getConstant(NumBytes,
+ getPointerTy(), true));
+
+ SmallVector<std::pair<unsigned, SDValue>, 4> RegsToPass;
+ SmallVector<SDValue, 12> MemOpChains;
+ SDValue StackPtr;
+
+ // Walk the register/memloc assignments, inserting copies/loads.
+ for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
+ CCValAssign &VA = ArgLocs[i];
+
+ SDValue Arg = Outs[i].Val;
+
+ // Promote the value if needed.
+ switch (VA.getLocInfo()) {
+ default: assert(0 && "Unknown loc info!");
+ case CCValAssign::Full: break;
+ case CCValAssign::SExt:
+ Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
+ break;
+ case CCValAssign::ZExt:
+ Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
+ break;
+ case CCValAssign::AExt:
+ Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
+ break;
+ }
+
+ // Arguments that can be passed on register must be kept at RegsToPass
+ // vector
+ if (VA.isRegLoc()) {
+ RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
+ } else {
+ assert(VA.isMemLoc());
+
+ if (StackPtr.getNode() == 0)
+ StackPtr = DAG.getCopyFromReg(Chain, dl, Alpha::R30, MVT::i64);
+
+ SDValue PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(),
+ StackPtr,
+ DAG.getIntPtrConstant(VA.getLocMemOffset()));
+
+ MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
+ PseudoSourceValue::getStack(), 0,
+ false, false, 0));
+ }
+ }
+
+ // Transform all store nodes into one single node because all store nodes are
+ // independent of each other.
+ if (!MemOpChains.empty())
+ Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
+ &MemOpChains[0], MemOpChains.size());
+
+ // Build a sequence of copy-to-reg nodes chained together with token chain and
+ // flag operands which copy the outgoing args into registers. The InFlag in
+ // necessary since all emited instructions must be stuck together.
+ SDValue InFlag;
+ for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
+ Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
+ RegsToPass[i].second, InFlag);
+ InFlag = Chain.getValue(1);
+ }
+
+ // Returns a chain & a flag for retval copy to use.
+ SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
+ SmallVector<SDValue, 8> Ops;
+ Ops.push_back(Chain);
+ Ops.push_back(Callee);
+
+ // Add argument registers to the end of the list so that they are
+ // known live into the call.
+ for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
+ Ops.push_back(DAG.getRegister(RegsToPass[i].first,
+ RegsToPass[i].second.getValueType()));
+
+ if (InFlag.getNode())
+ Ops.push_back(InFlag);
+
+ Chain = DAG.getNode(AlphaISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
+ InFlag = Chain.getValue(1);
+
+ // Create the CALLSEQ_END node.
+ Chain = DAG.getCALLSEQ_END(Chain,
+ DAG.getConstant(NumBytes, getPointerTy(), true),
+ DAG.getConstant(0, getPointerTy(), true),
+ InFlag);
+ InFlag = Chain.getValue(1);
+
+ // Handle result values, copying them out of physregs into vregs that we
+ // return.
+ return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
+ Ins, dl, DAG, InVals);
+}
+
+/// LowerCallResult - Lower the result values of a call into the
+/// appropriate copies out of appropriate physical registers.
+///
+SDValue
+AlphaTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
+ CallingConv::ID CallConv, bool isVarArg,
+ const SmallVectorImpl<ISD::InputArg> &Ins,
+ DebugLoc dl, SelectionDAG &DAG,
+ SmallVectorImpl<SDValue> &InVals) const {
+
+ // Assign locations to each value returned by this call.
+ SmallVector<CCValAssign, 16> RVLocs;
+ CCState CCInfo(CallConv, isVarArg, getTargetMachine(), RVLocs,
+ *DAG.getContext());
+
+ CCInfo.AnalyzeCallResult(Ins, RetCC_Alpha);
+
+ // Copy all of the result registers out of their specified physreg.
+ for (unsigned i = 0; i != RVLocs.size(); ++i) {
+ CCValAssign &VA = RVLocs[i];
+
+ Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
+ VA.getLocVT(), InFlag).getValue(1);
+ SDValue RetValue = Chain.getValue(0);
+ InFlag = Chain.getValue(2);
+
+ // If this is an 8/16/32-bit value, it is really passed promoted to 64
+ // bits. Insert an assert[sz]ext to capture this, then truncate to the
+ // right size.
+ if (VA.getLocInfo() == CCValAssign::SExt)
+ RetValue = DAG.getNode(ISD::AssertSext, dl, VA.getLocVT(), RetValue,
+ DAG.getValueType(VA.getValVT()));
+ else if (VA.getLocInfo() == CCValAssign::ZExt)
+ RetValue = DAG.getNode(ISD::AssertZext, dl, VA.getLocVT(), RetValue,
+ DAG.getValueType(VA.getValVT()));
+
+ if (VA.getLocInfo() != CCValAssign::Full)
+ RetValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), RetValue);
+
+ InVals.push_back(RetValue);
+ }
+
+ return Chain;
+}
+
+SDValue
+AlphaTargetLowering::LowerFormalArguments(SDValue Chain,
+ CallingConv::ID CallConv, bool isVarArg,
+ const SmallVectorImpl<ISD::InputArg>
+ &Ins,
+ DebugLoc dl, SelectionDAG &DAG,
+ SmallVectorImpl<SDValue> &InVals)
+ const {
+
+ MachineFunction &MF = DAG.getMachineFunction();
+ MachineFrameInfo *MFI = MF.getFrameInfo();
+ AlphaMachineFunctionInfo *FuncInfo = MF.getInfo<AlphaMachineFunctionInfo>();
+
+ unsigned args_int[] = {
+ Alpha::R16, Alpha::R17, Alpha::R18, Alpha::R19, Alpha::R20, Alpha::R21};
+ unsigned args_float[] = {
+ Alpha::F16, Alpha::F17, Alpha::F18, Alpha::F19, Alpha::F20, Alpha::F21};
+
+ for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e; ++ArgNo) {
+ SDValue argt;
+ EVT ObjectVT = Ins[ArgNo].VT;
+ SDValue ArgVal;
+
+ if (ArgNo < 6) {
+ switch (ObjectVT.getSimpleVT().SimpleTy) {
+ default:
+ assert(false && "Invalid value type!");
+ case MVT::f64:
+ args_float[ArgNo] = AddLiveIn(MF, args_float[ArgNo],
+ &Alpha::F8RCRegClass);
+ ArgVal = DAG.getCopyFromReg(Chain, dl, args_float[ArgNo], ObjectVT);
+ break;
+ case MVT::f32:
+ args_float[ArgNo] = AddLiveIn(MF, args_float[ArgNo],
+ &Alpha::F4RCRegClass);
+ ArgVal = DAG.getCopyFromReg(Chain, dl, args_float[ArgNo], ObjectVT);
+ break;
+ case MVT::i64:
+ args_int[ArgNo] = AddLiveIn(MF, args_int[ArgNo],
+ &Alpha::GPRCRegClass);
+ ArgVal = DAG.getCopyFromReg(Chain, dl, args_int[ArgNo], MVT::i64);
+ break;
+ }
+ } else { //more args
+ // Create the frame index object for this incoming parameter...
+ int FI = MFI->CreateFixedObject(8, 8 * (ArgNo - 6), true, false);
+
+ // Create the SelectionDAG nodes corresponding to a load
+ //from this parameter
+ SDValue FIN = DAG.getFrameIndex(FI, MVT::i64);
+ ArgVal = DAG.getLoad(ObjectVT, dl, Chain, FIN, NULL, 0,
+ false, false, 0);
+ }
+ InVals.push_back(ArgVal);
+ }
+
+ // If the functions takes variable number of arguments, copy all regs to stack
+ if (isVarArg) {
+ FuncInfo->setVarArgsOffset(Ins.size() * 8);
+ std::vector<SDValue> LS;
+ for (int i = 0; i < 6; ++i) {
+ if (TargetRegisterInfo::isPhysicalRegister(args_int[i]))
+ args_int[i] = AddLiveIn(MF, args_int[i], &Alpha::GPRCRegClass);
+ SDValue argt = DAG.getCopyFromReg(Chain, dl, args_int[i], MVT::i64);
+ int FI = MFI->CreateFixedObject(8, -8 * (6 - i), true, false);
+ if (i == 0) FuncInfo->setVarArgsBase(FI);
+ SDValue SDFI = DAG.getFrameIndex(FI, MVT::i64);
+ LS.push_back(DAG.getStore(Chain, dl, argt, SDFI, NULL, 0,
+ false, false, 0));
+
+ if (TargetRegisterInfo::isPhysicalRegister(args_float[i]))
+ args_float[i] = AddLiveIn(MF, args_float[i], &Alpha::F8RCRegClass);
+ argt = DAG.getCopyFromReg(Chain, dl, args_float[i], MVT::f64);
+ FI = MFI->CreateFixedObject(8, - 8 * (12 - i), true, false);
+ SDFI = DAG.getFrameIndex(FI, MVT::i64);
+ LS.push_back(DAG.getStore(Chain, dl, argt, SDFI, NULL, 0,
+ false, false, 0));
+ }
+
+ //Set up a token factor with all the stack traffic
+ Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &LS[0], LS.size());
+ }
+
+ return Chain;
+}
+
+SDValue
+AlphaTargetLowering::LowerReturn(SDValue Chain,
+ CallingConv::ID CallConv, bool isVarArg,
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ DebugLoc dl, SelectionDAG &DAG) const {
+
+ SDValue Copy = DAG.getCopyToReg(Chain, dl, Alpha::R26,
+ DAG.getNode(AlphaISD::GlobalRetAddr,
+ DebugLoc(), MVT::i64),
+ SDValue());
+ switch (Outs.size()) {
+ default:
+ llvm_unreachable("Do not know how to return this many arguments!");
+ case 0:
+ break;
+ //return SDValue(); // ret void is legal
+ case 1: {
+ EVT ArgVT = Outs[0].Val.getValueType();
+ unsigned ArgReg;
+ if (ArgVT.isInteger())
+ ArgReg = Alpha::R0;
+ else {
+ assert(ArgVT.isFloatingPoint());
+ ArgReg = Alpha::F0;
+ }
+ Copy = DAG.getCopyToReg(Copy, dl, ArgReg,
+ Outs[0].Val, Copy.getValue(1));
+ if (DAG.getMachineFunction().getRegInfo().liveout_empty())
+ DAG.getMachineFunction().getRegInfo().addLiveOut(ArgReg);
+ break;
+ }
+ case 2: {
+ EVT ArgVT = Outs[0].Val.getValueType();
+ unsigned ArgReg1, ArgReg2;
+ if (ArgVT.isInteger()) {
+ ArgReg1 = Alpha::R0;
+ ArgReg2 = Alpha::R1;
+ } else {
+ assert(ArgVT.isFloatingPoint());
+ ArgReg1 = Alpha::F0;
+ ArgReg2 = Alpha::F1;
+ }
+ Copy = DAG.getCopyToReg(Copy, dl, ArgReg1,
+ Outs[0].Val, Copy.getValue(1));
+ if (std::find(DAG.getMachineFunction().getRegInfo().liveout_begin(),
+ DAG.getMachineFunction().getRegInfo().liveout_end(), ArgReg1)
+ == DAG.getMachineFunction().getRegInfo().liveout_end())
+ DAG.getMachineFunction().getRegInfo().addLiveOut(ArgReg1);
+ Copy = DAG.getCopyToReg(Copy, dl, ArgReg2,
+ Outs[1].Val, Copy.getValue(1));
+ if (std::find(DAG.getMachineFunction().getRegInfo().liveout_begin(),
+ DAG.getMachineFunction().getRegInfo().liveout_end(), ArgReg2)
+ == DAG.getMachineFunction().getRegInfo().liveout_end())
+ DAG.getMachineFunction().getRegInfo().addLiveOut(ArgReg2);
+ break;
+ }
+ }
+ return DAG.getNode(AlphaISD::RET_FLAG, dl,
+ MVT::Other, Copy, Copy.getValue(1));
+}
+
+void AlphaTargetLowering::LowerVAARG(SDNode *N, SDValue &Chain,
+ SDValue &DataPtr,
+ SelectionDAG &DAG) const {
+ Chain = N->getOperand(0);
+ SDValue VAListP = N->getOperand(1);
+ const Value *VAListS = cast<SrcValueSDNode>(N->getOperand(2))->getValue();
+ DebugLoc dl = N->getDebugLoc();
+
+ SDValue Base = DAG.getLoad(MVT::i64, dl, Chain, VAListP, VAListS, 0,
+ false, false, 0);
+ SDValue Tmp = DAG.getNode(ISD::ADD, dl, MVT::i64, VAListP,
+ DAG.getConstant(8, MVT::i64));
+ SDValue Offset = DAG.getExtLoad(ISD::SEXTLOAD, dl, MVT::i64, Base.getValue(1),
+ Tmp, NULL, 0, MVT::i32, false, false, 0);
+ DataPtr = DAG.getNode(ISD::ADD, dl, MVT::i64, Base, Offset);
+ if (N->getValueType(0).isFloatingPoint())
+ {
+ //if fp && Offset < 6*8, then subtract 6*8 from DataPtr
+ SDValue FPDataPtr = DAG.getNode(ISD::SUB, dl, MVT::i64, DataPtr,
+ DAG.getConstant(8*6, MVT::i64));
+ SDValue CC = DAG.getSetCC(dl, MVT::i64, Offset,
+ DAG.getConstant(8*6, MVT::i64), ISD::SETLT);
+ DataPtr = DAG.getNode(ISD::SELECT, dl, MVT::i64, CC, FPDataPtr, DataPtr);
+ }
+
+ SDValue NewOffset = DAG.getNode(ISD::ADD, dl, MVT::i64, Offset,
+ DAG.getConstant(8, MVT::i64));
+ Chain = DAG.getTruncStore(Offset.getValue(1), dl, NewOffset, Tmp, NULL, 0,
+ MVT::i32, false, false, 0);
+}
+
+/// LowerOperation - Provide custom lowering hooks for some operations.
+///
+SDValue AlphaTargetLowering::LowerOperation(SDValue Op,
+ SelectionDAG &DAG) const {
+ DebugLoc dl = Op.getDebugLoc();
+ switch (Op.getOpcode()) {
+ default: llvm_unreachable("Wasn't expecting to be able to lower this!");
+ case ISD::JumpTable: return LowerJumpTable(Op, DAG);
+
+ case ISD::INTRINSIC_WO_CHAIN: {
+ unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
+ switch (IntNo) {
+ default: break; // Don't custom lower most intrinsics.
+ case Intrinsic::alpha_umulh:
+ return DAG.getNode(ISD::MULHU, dl, MVT::i64,
+ Op.getOperand(1), Op.getOperand(2));
+ }
+ }
+
+ case ISD::SRL_PARTS: {
+ SDValue ShOpLo = Op.getOperand(0);
+ SDValue ShOpHi = Op.getOperand(1);
+ SDValue ShAmt = Op.getOperand(2);
+ SDValue bm = DAG.getNode(ISD::SUB, dl, MVT::i64,
+ DAG.getConstant(64, MVT::i64), ShAmt);
+ SDValue BMCC = DAG.getSetCC(dl, MVT::i64, bm,
+ DAG.getConstant(0, MVT::i64), ISD::SETLE);
+ // if 64 - shAmt <= 0
+ SDValue Hi_Neg = DAG.getConstant(0, MVT::i64);
+ SDValue ShAmt_Neg = DAG.getNode(ISD::SUB, dl, MVT::i64,
+ DAG.getConstant(0, MVT::i64), bm);
+ SDValue Lo_Neg = DAG.getNode(ISD::SRL, dl, MVT::i64, ShOpHi, ShAmt_Neg);
+ // else
+ SDValue carries = DAG.getNode(ISD::SHL, dl, MVT::i64, ShOpHi, bm);
+ SDValue Hi_Pos = DAG.getNode(ISD::SRL, dl, MVT::i64, ShOpHi, ShAmt);
+ SDValue Lo_Pos = DAG.getNode(ISD::SRL, dl, MVT::i64, ShOpLo, ShAmt);
+ Lo_Pos = DAG.getNode(ISD::OR, dl, MVT::i64, Lo_Pos, carries);
+ // Merge
+ SDValue Hi = DAG.getNode(ISD::SELECT, dl, MVT::i64, BMCC, Hi_Neg, Hi_Pos);
+ SDValue Lo = DAG.getNode(ISD::SELECT, dl, MVT::i64, BMCC, Lo_Neg, Lo_Pos);
+ SDValue Ops[2] = { Lo, Hi };
+ return DAG.getMergeValues(Ops, 2, dl);
+ }
+ // case ISD::SRA_PARTS:
+
+ // case ISD::SHL_PARTS:
+
+
+ case ISD::SINT_TO_FP: {
+ assert(Op.getOperand(0).getValueType() == MVT::i64 &&
+ "Unhandled SINT_TO_FP type in custom expander!");
+ SDValue LD;
+ bool isDouble = Op.getValueType() == MVT::f64;
+ LD = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f64, Op.getOperand(0));
+ SDValue FP = DAG.getNode(isDouble?AlphaISD::CVTQT_:AlphaISD::CVTQS_, dl,
+ isDouble?MVT::f64:MVT::f32, LD);
+ return FP;
+ }
+ case ISD::FP_TO_SINT: {
+ bool isDouble = Op.getOperand(0).getValueType() == MVT::f64;
+ SDValue src = Op.getOperand(0);
+
+ if (!isDouble) //Promote
+ src = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, src);
+
+ src = DAG.getNode(AlphaISD::CVTTQ_, dl, MVT::f64, src);
+
+ return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i64, src);
+ }
+ case ISD::ConstantPool: {
+ ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
+ const Constant *C = CP->getConstVal();
+ SDValue CPI = DAG.getTargetConstantPool(C, MVT::i64, CP->getAlignment());
+ // FIXME there isn't really any debug info here
+
+ SDValue Hi = DAG.getNode(AlphaISD::GPRelHi, dl, MVT::i64, CPI,
+ DAG.getGLOBAL_OFFSET_TABLE(MVT::i64));
+ SDValue Lo = DAG.getNode(AlphaISD::GPRelLo, dl, MVT::i64, CPI, Hi);
+ return Lo;
+ }
+ case ISD::GlobalTLSAddress:
+ llvm_unreachable("TLS not implemented for Alpha.");
+ case ISD::GlobalAddress: {
+ GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
+ const GlobalValue *GV = GSDN->getGlobal();
+ SDValue GA = DAG.getTargetGlobalAddress(GV, MVT::i64, GSDN->getOffset());
+ // FIXME there isn't really any debug info here
+
+ // if (!GV->hasWeakLinkage() && !GV->isDeclaration() && !GV->hasLinkOnceLinkage()) {
+ if (GV->hasLocalLinkage()) {
+ SDValue Hi = DAG.getNode(AlphaISD::GPRelHi, dl, MVT::i64, GA,
+ DAG.getGLOBAL_OFFSET_TABLE(MVT::i64));
+ SDValue Lo = DAG.getNode(AlphaISD::GPRelLo, dl, MVT::i64, GA, Hi);
+ return Lo;
+ } else
+ return DAG.getNode(AlphaISD::RelLit, dl, MVT::i64, GA,
+ DAG.getGLOBAL_OFFSET_TABLE(MVT::i64));
+ }
+ case ISD::ExternalSymbol: {
+ return DAG.getNode(AlphaISD::RelLit, dl, MVT::i64,
+ DAG.getTargetExternalSymbol(cast<ExternalSymbolSDNode>(Op)
+ ->getSymbol(), MVT::i64),
+ DAG.getGLOBAL_OFFSET_TABLE(MVT::i64));
+ }
+
+ case ISD::UREM:
+ case ISD::SREM:
+ //Expand only on constant case
+ if (Op.getOperand(1).getOpcode() == ISD::Constant) {
+ EVT VT = Op.getNode()->getValueType(0);
+ SDValue Tmp1 = Op.getNode()->getOpcode() == ISD::UREM ?
+ BuildUDIV(Op.getNode(), DAG, NULL) :
+ BuildSDIV(Op.getNode(), DAG, NULL);
+ Tmp1 = DAG.getNode(ISD::MUL, dl, VT, Tmp1, Op.getOperand(1));
+ Tmp1 = DAG.getNode(ISD::SUB, dl, VT, Op.getOperand(0), Tmp1);
+ return Tmp1;
+ }
+ //fall through
+ case ISD::SDIV:
+ case ISD::UDIV:
+ if (Op.getValueType().isInteger()) {
+ if (Op.getOperand(1).getOpcode() == ISD::Constant)
+ return Op.getOpcode() == ISD::SDIV ? BuildSDIV(Op.getNode(), DAG, NULL)
+ : BuildUDIV(Op.getNode(), DAG, NULL);
+ const char* opstr = 0;
+ switch (Op.getOpcode()) {
+ case ISD::UREM: opstr = "__remqu"; break;
+ case ISD::SREM: opstr = "__remq"; break;
+ case ISD::UDIV: opstr = "__divqu"; break;
+ case ISD::SDIV: opstr = "__divq"; break;
+ }
+ SDValue Tmp1 = Op.getOperand(0),
+ Tmp2 = Op.getOperand(1),
+ Addr = DAG.getExternalSymbol(opstr, MVT::i64);
+ return DAG.getNode(AlphaISD::DivCall, dl, MVT::i64, Addr, Tmp1, Tmp2);
+ }
+ break;
+
+ case ISD::VAARG: {
+ SDValue Chain, DataPtr;
+ LowerVAARG(Op.getNode(), Chain, DataPtr, DAG);
+
+ SDValue Result;
+ if (Op.getValueType() == MVT::i32)
+ Result = DAG.getExtLoad(ISD::SEXTLOAD, dl, MVT::i64, Chain, DataPtr,
+ NULL, 0, MVT::i32, false, false, 0);
+ else
+ Result = DAG.getLoad(Op.getValueType(), dl, Chain, DataPtr, NULL, 0,
+ false, false, 0);
+ return Result;
+ }
+ case ISD::VACOPY: {
+ SDValue Chain = Op.getOperand(0);
+ SDValue DestP = Op.getOperand(1);
+ SDValue SrcP = Op.getOperand(2);
+ const Value *DestS = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
+ const Value *SrcS = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
+
+ SDValue Val = DAG.getLoad(getPointerTy(), dl, Chain, SrcP, SrcS, 0,
+ false, false, 0);
+ SDValue Result = DAG.getStore(Val.getValue(1), dl, Val, DestP, DestS, 0,
+ false, false, 0);
+ SDValue NP = DAG.getNode(ISD::ADD, dl, MVT::i64, SrcP,
+ DAG.getConstant(8, MVT::i64));
+ Val = DAG.getExtLoad(ISD::SEXTLOAD, dl, MVT::i64, Result,
+ NP, NULL,0, MVT::i32, false, false, 0);
+ SDValue NPD = DAG.getNode(ISD::ADD, dl, MVT::i64, DestP,
+ DAG.getConstant(8, MVT::i64));
+ return DAG.getTruncStore(Val.getValue(1), dl, Val, NPD, NULL, 0, MVT::i32,
+ false, false, 0);
+ }
+ case ISD::VASTART: {
+ MachineFunction &MF = DAG.getMachineFunction();
+ AlphaMachineFunctionInfo *FuncInfo = MF.getInfo<AlphaMachineFunctionInfo>();
+
+ SDValue Chain = Op.getOperand(0);
+ SDValue VAListP = Op.getOperand(1);
+ const Value *VAListS = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
+
+ // vastart stores the address of the VarArgsBase and VarArgsOffset
+ SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsBase(), MVT::i64);
+ SDValue S1 = DAG.getStore(Chain, dl, FR, VAListP, VAListS, 0,
+ false, false, 0);
+ SDValue SA2 = DAG.getNode(ISD::ADD, dl, MVT::i64, VAListP,
+ DAG.getConstant(8, MVT::i64));
+ return DAG.getTruncStore(S1, dl,
+ DAG.getConstant(FuncInfo->getVarArgsOffset(),
+ MVT::i64),
+ SA2, NULL, 0, MVT::i32, false, false, 0);
+ }
+ case ISD::RETURNADDR:
+ return DAG.getNode(AlphaISD::GlobalRetAddr, DebugLoc(), MVT::i64);
+ //FIXME: implement
+ case ISD::FRAMEADDR: break;
+ }
+
+ return SDValue();
+}
+
+void AlphaTargetLowering::ReplaceNodeResults(SDNode *N,
+ SmallVectorImpl<SDValue>&Results,
+ SelectionDAG &DAG) const {
+ DebugLoc dl = N->getDebugLoc();
+ assert(N->getValueType(0) == MVT::i32 &&
+ N->getOpcode() == ISD::VAARG &&
+ "Unknown node to custom promote!");
+
+ SDValue Chain, DataPtr;
+ LowerVAARG(N, Chain, DataPtr, DAG);
+ SDValue Res = DAG.getLoad(N->getValueType(0), dl, Chain, DataPtr, NULL, 0,
+ false, false, 0);
+ Results.push_back(Res);
+ Results.push_back(SDValue(Res.getNode(), 1));
+}
+
+
+//Inline Asm
+
+/// getConstraintType - Given a constraint letter, return the type of
+/// constraint it is for this target.
+AlphaTargetLowering::ConstraintType
+AlphaTargetLowering::getConstraintType(const std::string &Constraint) const {
+ if (Constraint.size() == 1) {
+ switch (Constraint[0]) {
+ default: break;
+ case 'f':
+ case 'r':
+ return C_RegisterClass;
+ }
+ }
+ return TargetLowering::getConstraintType(Constraint);
+}
+
+std::vector<unsigned> AlphaTargetLowering::
+getRegClassForInlineAsmConstraint(const std::string &Constraint,
+ EVT VT) const {
+ if (Constraint.size() == 1) {
+ switch (Constraint[0]) {
+ default: break; // Unknown constriant letter
+ case 'f':
+ return make_vector<unsigned>(Alpha::F0 , Alpha::F1 , Alpha::F2 ,
+ Alpha::F3 , Alpha::F4 , Alpha::F5 ,
+ Alpha::F6 , Alpha::F7 , Alpha::F8 ,
+ Alpha::F9 , Alpha::F10, Alpha::F11,
+ Alpha::F12, Alpha::F13, Alpha::F14,
+ Alpha::F15, Alpha::F16, Alpha::F17,
+ Alpha::F18, Alpha::F19, Alpha::F20,
+ Alpha::F21, Alpha::F22, Alpha::F23,
+ Alpha::F24, Alpha::F25, Alpha::F26,
+ Alpha::F27, Alpha::F28, Alpha::F29,
+ Alpha::F30, Alpha::F31, 0);
+ case 'r':
+ return make_vector<unsigned>(Alpha::R0 , Alpha::R1 , Alpha::R2 ,
+ Alpha::R3 , Alpha::R4 , Alpha::R5 ,
+ Alpha::R6 , Alpha::R7 , Alpha::R8 ,
+ Alpha::R9 , Alpha::R10, Alpha::R11,
+ Alpha::R12, Alpha::R13, Alpha::R14,
+ Alpha::R15, Alpha::R16, Alpha::R17,
+ Alpha::R18, Alpha::R19, Alpha::R20,
+ Alpha::R21, Alpha::R22, Alpha::R23,
+ Alpha::R24, Alpha::R25, Alpha::R26,
+ Alpha::R27, Alpha::R28, Alpha::R29,
+ Alpha::R30, Alpha::R31, 0);
+ }
+ }
+
+ return std::vector<unsigned>();
+}
+//===----------------------------------------------------------------------===//
+// Other Lowering Code
+//===----------------------------------------------------------------------===//
+
+MachineBasicBlock *
+AlphaTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
+ MachineBasicBlock *BB) const {
+ const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
+ assert((MI->getOpcode() == Alpha::CAS32 ||
+ MI->getOpcode() == Alpha::CAS64 ||
+ MI->getOpcode() == Alpha::LAS32 ||
+ MI->getOpcode() == Alpha::LAS64 ||
+ MI->getOpcode() == Alpha::SWAP32 ||
+ MI->getOpcode() == Alpha::SWAP64) &&
+ "Unexpected instr type to insert");
+
+ bool is32 = MI->getOpcode() == Alpha::CAS32 ||
+ MI->getOpcode() == Alpha::LAS32 ||
+ MI->getOpcode() == Alpha::SWAP32;
+
+ //Load locked store conditional for atomic ops take on the same form
+ //start:
+ //ll
+ //do stuff (maybe branch to exit)
+ //sc
+ //test sc and maybe branck to start
+ //exit:
+ const BasicBlock *LLVM_BB = BB->getBasicBlock();
+ DebugLoc dl = MI->getDebugLoc();
+ MachineFunction::iterator It = BB;
+ ++It;
+
+ MachineBasicBlock *thisMBB = BB;
+ MachineFunction *F = BB->getParent();
+ MachineBasicBlock *llscMBB = F->CreateMachineBasicBlock(LLVM_BB);
+ MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
+
+ sinkMBB->transferSuccessors(thisMBB);
+
+ F->insert(It, llscMBB);
+ F->insert(It, sinkMBB);
+
+ BuildMI(thisMBB, dl, TII->get(Alpha::BR)).addMBB(llscMBB);
+
+ unsigned reg_res = MI->getOperand(0).getReg(),
+ reg_ptr = MI->getOperand(1).getReg(),
+ reg_v2 = MI->getOperand(2).getReg(),
+ reg_store = F->getRegInfo().createVirtualRegister(&Alpha::GPRCRegClass);
+
+ BuildMI(llscMBB, dl, TII->get(is32 ? Alpha::LDL_L : Alpha::LDQ_L),
+ reg_res).addImm(0).addReg(reg_ptr);
+ switch (MI->getOpcode()) {
+ case Alpha::CAS32:
+ case Alpha::CAS64: {
+ unsigned reg_cmp
+ = F->getRegInfo().createVirtualRegister(&Alpha::GPRCRegClass);
+ BuildMI(llscMBB, dl, TII->get(Alpha::CMPEQ), reg_cmp)
+ .addReg(reg_v2).addReg(reg_res);
+ BuildMI(llscMBB, dl, TII->get(Alpha::BEQ))
+ .addImm(0).addReg(reg_cmp).addMBB(sinkMBB);
+ BuildMI(llscMBB, dl, TII->get(Alpha::BISr), reg_store)
+ .addReg(Alpha::R31).addReg(MI->getOperand(3).getReg());
+ break;
+ }
+ case Alpha::LAS32:
+ case Alpha::LAS64: {
+ BuildMI(llscMBB, dl,TII->get(is32 ? Alpha::ADDLr : Alpha::ADDQr), reg_store)
+ .addReg(reg_res).addReg(reg_v2);
+ break;
+ }
+ case Alpha::SWAP32:
+ case Alpha::SWAP64: {
+ BuildMI(llscMBB, dl, TII->get(Alpha::BISr), reg_store)
+ .addReg(reg_v2).addReg(reg_v2);
+ break;
+ }
+ }
+ BuildMI(llscMBB, dl, TII->get(is32 ? Alpha::STL_C : Alpha::STQ_C), reg_store)
+ .addReg(reg_store).addImm(0).addReg(reg_ptr);
+ BuildMI(llscMBB, dl, TII->get(Alpha::BEQ))
+ .addImm(0).addReg(reg_store).addMBB(llscMBB);
+ BuildMI(llscMBB, dl, TII->get(Alpha::BR)).addMBB(sinkMBB);
+
+ thisMBB->addSuccessor(llscMBB);
+ llscMBB->addSuccessor(llscMBB);
+ llscMBB->addSuccessor(sinkMBB);
+ F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
+
+ return sinkMBB;
+}
+
+bool
+AlphaTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
+ // The Alpha target isn't yet aware of offsets.
+ return false;
+}
+
+bool AlphaTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
+ if (VT != MVT::f32 && VT != MVT::f64)
+ return false;
+ // +0.0 F31
+ // +0.0f F31
+ // -0.0 -F31
+ // -0.0f -F31
+ return Imm.isZero() || Imm.isNegZero();
+}
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