index 3695ce2324f588addc4c87d03a7c247e8edf3150..450f0771d908a011e02695a5cc64039eee62e8d0 100644 (file)
#define DEBUG_TYPE "xcore-lower"
#include "XCoreISelLowering.h"
-#include "XCoreMachineFunctionInfo.h"
#include "XCore.h"
-#include "XCoreTargetObjectFile.h"
-#include "XCoreTargetMachine.h"
+#include "XCoreMachineFunctionInfo.h"
#include "XCoreSubtarget.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Function.h"
-#include "llvm/Intrinsics.h"
-#include "llvm/CallingConv.h"
-#include "llvm/GlobalVariable.h"
-#include "llvm/GlobalAlias.h"
+#include "XCoreTargetMachine.h"
+#include "XCoreTargetObjectFile.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/IR/CallingConv.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/GlobalAlias.h"
+#include "llvm/IR/GlobalVariable.h"
+#include "llvm/IR/Intrinsics.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+
using namespace llvm;
const char *XCoreTargetLowering::
case XCoreISD::LMUL : return "XCoreISD::LMUL";
case XCoreISD::MACCU : return "XCoreISD::MACCU";
case XCoreISD::MACCS : return "XCoreISD::MACCS";
+ case XCoreISD::CRC8 : return "XCoreISD::CRC8";
case XCoreISD::BR_JT : return "XCoreISD::BR_JT";
case XCoreISD::BR_JT32 : return "XCoreISD::BR_JT32";
+ case XCoreISD::FRAME_TO_ARGS_OFFSET : return "XCoreISD::FRAME_TO_ARGS_OFFSET";
+ case XCoreISD::EH_RETURN : return "XCoreISD::EH_RETURN";
+ case XCoreISD::MEMBARRIER : return "XCoreISD::MEMBARRIER";
default : return NULL;
}
}
setStackPointerRegisterToSaveRestore(XCore::SP);
- setSchedulingPreference(Sched::RegPressure);
+ setSchedulingPreference(Sched::Source);
// Use i32 for setcc operations results (slt, sgt, ...).
setBooleanContents(ZeroOrOneBooleanContent);
setBooleanVectorContents(ZeroOrOneBooleanContent); // FIXME: Is this correct?
// XCore does not have the NodeTypes below.
- setOperationAction(ISD::BR_CC, MVT::Other, Expand);
+ setOperationAction(ISD::BR_CC, MVT::i32, Expand);
setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
setOperationAction(ISD::ADDC, MVT::i32, Expand);
setOperationAction(ISD::ADDE, MVT::i32, Expand);
setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
setOperationAction(ISD::BlockAddress, MVT::i32 , Custom);
- // Thread Local Storage
- setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
-
// Conversion of i64 -> double produces constantpool nodes
setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
+ // Exception handling
+ setOperationAction(ISD::EH_RETURN, MVT::Other, Custom);
+ setExceptionPointerRegister(XCore::R0);
+ setExceptionSelectorRegister(XCore::R1);
+ setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
+
+ // Atomic operations
+ // We request a fence for ATOMIC_* instructions, to reduce them to Monotonic.
+ // As we are always Sequential Consistent, an ATOMIC_FENCE becomes a no OP.
+ setInsertFencesForAtomic(true);
+ setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
+ setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Custom);
+ setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Custom);
+
// TRAMPOLINE is custom lowered.
setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
- maxStoresPerMemset = maxStoresPerMemsetOptSize = 4;
- maxStoresPerMemmove = maxStoresPerMemmoveOptSize
- = maxStoresPerMemcpy = maxStoresPerMemcpyOptSize = 2;
+ // We want to custom lower some of our intrinsics.
+ setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
+
+ MaxStoresPerMemset = MaxStoresPerMemsetOptSize = 4;
+ MaxStoresPerMemmove = MaxStoresPerMemmoveOptSize
+ = MaxStoresPerMemcpy = MaxStoresPerMemcpyOptSize = 2;
// We have target-specific dag combine patterns for the following nodes:
setTargetDAGCombine(ISD::STORE);
setTargetDAGCombine(ISD::ADD);
+ setTargetDAGCombine(ISD::INTRINSIC_VOID);
+ setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
setMinFunctionAlignment(1);
+ setPrefFunctionAlignment(2);
+}
+
+bool XCoreTargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
+ if (Val.getOpcode() != ISD::LOAD)
+ return false;
+
+ EVT VT1 = Val.getValueType();
+ if (!VT1.isSimple() || !VT1.isInteger() ||
+ !VT2.isSimple() || !VT2.isInteger())
+ return false;
+
+ switch (VT1.getSimpleVT().SimpleTy) {
+ default: break;
+ case MVT::i8:
+ return true;
+ }
+
+ return false;
}
SDValue XCoreTargetLowering::
LowerOperation(SDValue Op, SelectionDAG &DAG) const {
switch (Op.getOpcode())
{
- case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
- case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
- case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
- case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
- case ISD::BR_JT: return LowerBR_JT(Op, DAG);
- case ISD::LOAD: return LowerLOAD(Op, DAG);
- case ISD::STORE: return LowerSTORE(Op, DAG);
- case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
- case ISD::VAARG: return LowerVAARG(Op, DAG);
- case ISD::VASTART: return LowerVASTART(Op, DAG);
- case ISD::SMUL_LOHI: return LowerSMUL_LOHI(Op, DAG);
- case ISD::UMUL_LOHI: return LowerUMUL_LOHI(Op, DAG);
+ case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
+ case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
+ case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
+ case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
+ case ISD::BR_JT: return LowerBR_JT(Op, DAG);
+ case ISD::LOAD: return LowerLOAD(Op, DAG);
+ case ISD::STORE: return LowerSTORE(Op, DAG);
+ case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
+ case ISD::VAARG: return LowerVAARG(Op, DAG);
+ case ISD::VASTART: return LowerVASTART(Op, DAG);
+ case ISD::SMUL_LOHI: return LowerSMUL_LOHI(Op, DAG);
+ case ISD::UMUL_LOHI: return LowerUMUL_LOHI(Op, DAG);
// FIXME: Remove these when LegalizeDAGTypes lands.
case ISD::ADD:
- case ISD::SUB: return ExpandADDSUB(Op.getNode(), DAG);
- case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
- case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
- case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
+ case ISD::SUB: return ExpandADDSUB(Op.getNode(), DAG);
+ case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
+ case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
+ case ISD::FRAME_TO_ARGS_OFFSET: return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
+ case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
+ case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
+ case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
+ case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG);
+ case ISD::ATOMIC_LOAD: return LowerATOMIC_LOAD(Op, DAG);
+ case ISD::ATOMIC_STORE: return LowerATOMIC_STORE(Op, DAG);
default:
llvm_unreachable("unimplemented operand");
}
SDValue XCoreTargetLowering::
LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const
{
- DebugLoc dl = Op.getDebugLoc();
+ SDLoc dl(Op);
SDValue Cond = DAG.getNode(ISD::SETCC, dl, MVT::i32, Op.getOperand(2),
Op.getOperand(3), Op.getOperand(4));
return DAG.getNode(ISD::SELECT, dl, MVT::i32, Cond, Op.getOperand(0),
SelectionDAG &DAG) const
{
// FIXME there is no actual debug info here
- DebugLoc dl = GA.getDebugLoc();
- if (isa<Function>(GV)) {
- return DAG.getNode(XCoreISD::PCRelativeWrapper, dl, MVT::i32, GA);
- }
- const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
- if (!GVar) {
- // If GV is an alias then use the aliasee to determine constness
- if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
- GVar = dyn_cast_or_null<GlobalVariable>(GA->resolveAliasedGlobal());
+ SDLoc dl(GA);
+ const GlobalValue *UnderlyingGV = GV;
+ // If GV is an alias then use the aliasee to determine the wrapper type
+ if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
+ UnderlyingGV = GA->resolveAliasedGlobal();
+ if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(UnderlyingGV)) {
+ if ( ( GVar->isConstant() &&
+ UnderlyingGV->isLocalLinkage(GV->getLinkage()) )
+ || ( GVar->hasSection() &&
+ StringRef(GVar->getSection()).startswith(".cp.") ) )
+ return DAG.getNode(XCoreISD::CPRelativeWrapper, dl, MVT::i32, GA);
+ return DAG.getNode(XCoreISD::DPRelativeWrapper, dl, MVT::i32, GA);
}
- bool isConst = GVar && GVar->isConstant();
- if (isConst) {
- return DAG.getNode(XCoreISD::CPRelativeWrapper, dl, MVT::i32, GA);
- }
- return DAG.getNode(XCoreISD::DPRelativeWrapper, dl, MVT::i32, GA);
+ return DAG.getNode(XCoreISD::PCRelativeWrapper, dl, MVT::i32, GA);
}
-SDValue XCoreTargetLowering::
-LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const
-{
- const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
- SDValue GA = DAG.getTargetGlobalAddress(GV, Op.getDebugLoc(), MVT::i32);
- return getGlobalAddressWrapper(GA, GV, DAG);
-}
+static bool IsSmallObject(const GlobalValue *GV, const XCoreTargetLowering &XTL) {
+ if (XTL.getTargetMachine().getCodeModel() == CodeModel::Small)
+ return true;
-static inline SDValue BuildGetId(SelectionDAG &DAG, DebugLoc dl) {
- return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::i32,
- DAG.getConstant(Intrinsic::xcore_getid, MVT::i32));
-}
+ Type *ObjType = GV->getType()->getPointerElementType();
+ if (!ObjType->isSized())
+ return false;
-static inline bool isZeroLengthArray(Type *Ty) {
- ArrayType *AT = dyn_cast_or_null<ArrayType>(Ty);
- return AT && (AT->getNumElements() == 0);
+ unsigned ObjSize = XTL.getDataLayout()->getTypeAllocSize(ObjType);
+ return ObjSize < CodeModelLargeSize && ObjSize != 0;
}
SDValue XCoreTargetLowering::
-LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const
+LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const
{
- // FIXME there isn't really debug info here
- DebugLoc dl = Op.getDebugLoc();
- // transform to label + getid() * size
- const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
- SDValue GA = DAG.getTargetGlobalAddress(GV, dl, MVT::i32);
- const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
- if (!GVar) {
- // If GV is an alias then use the aliasee to determine size
- if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
- GVar = dyn_cast_or_null<GlobalVariable>(GA->resolveAliasedGlobal());
- }
- if (!GVar) {
- llvm_unreachable("Thread local object not a GlobalVariable?");
- }
- Type *Ty = cast<PointerType>(GV->getType())->getElementType();
- if (!Ty->isSized() || isZeroLengthArray(Ty)) {
-#ifndef NDEBUG
- errs() << "Size of thread local object " << GVar->getName()
- << " is unknown\n";
-#endif
- llvm_unreachable(0);
+ const GlobalAddressSDNode *GN = cast<GlobalAddressSDNode>(Op);
+ const GlobalValue *GV = GN->getGlobal();
+ SDLoc DL(GN);
+ int64_t Offset = GN->getOffset();
+ if (IsSmallObject(GV, *this)) {
+ // We can only fold positive offsets that are a multiple of the word size.
+ int64_t FoldedOffset = std::max(Offset & ~3, (int64_t)0);
+ SDValue GA = DAG.getTargetGlobalAddress(GV, DL, MVT::i32, FoldedOffset);
+ GA = getGlobalAddressWrapper(GA, GV, DAG);
+ // Handle the rest of the offset.
+ if (Offset != FoldedOffset) {
+ SDValue Remaining = DAG.getConstant(Offset - FoldedOffset, MVT::i32);
+ GA = DAG.getNode(ISD::ADD, DL, MVT::i32, GA, Remaining);
+ }
+ return GA;
+ } else {
+ // Ideally we would not fold in offset with an index <= 11.
+ Type *Ty = Type::getInt8PtrTy(*DAG.getContext());
+ Constant *GA = ConstantExpr::getBitCast(const_cast<GlobalValue*>(GV), Ty);
+ Ty = Type::getInt32Ty(*DAG.getContext());
+ Constant *Idx = ConstantInt::get(Ty, Offset);
+ Constant *GAI = ConstantExpr::getGetElementPtr(GA, Idx);
+ SDValue CP = DAG.getConstantPool(GAI, MVT::i32);
+ return DAG.getLoad(getPointerTy(), DL, DAG.getEntryNode(), CP,
+ MachinePointerInfo(), false, false, false, 0);
}
- SDValue base = getGlobalAddressWrapper(GA, GV, DAG);
- const TargetData *TD = TM.getTargetData();
- unsigned Size = TD->getTypeAllocSize(Ty);
- SDValue offset = DAG.getNode(ISD::MUL, dl, MVT::i32, BuildGetId(DAG, dl),
- DAG.getConstant(Size, MVT::i32));
- return DAG.getNode(ISD::ADD, dl, MVT::i32, base, offset);
}
SDValue XCoreTargetLowering::
LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const
{
- DebugLoc DL = Op.getDebugLoc();
+ SDLoc DL(Op);
const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
SDValue Result = DAG.getTargetBlockAddress(BA, getPointerTy());
{
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
// FIXME there isn't really debug info here
- DebugLoc dl = CP->getDebugLoc();
+ SDLoc dl(CP);
EVT PtrVT = Op.getValueType();
SDValue Res;
if (CP->isMachineConstantPoolEntry()) {
Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
- CP->getAlignment());
+ CP->getAlignment(), CP->getOffset());
} else {
Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
- CP->getAlignment());
+ CP->getAlignment(), CP->getOffset());
}
return DAG.getNode(XCoreISD::CPRelativeWrapper, dl, MVT::i32, Res);
}
SDValue Chain = Op.getOperand(0);
SDValue Table = Op.getOperand(1);
SDValue Index = Op.getOperand(2);
- DebugLoc dl = Op.getDebugLoc();
+ SDLoc dl(Op);
JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
unsigned JTI = JT->getIndex();
MachineFunction &MF = DAG.getMachineFunction();
ScaledIndex);
}
-static bool
-IsWordAlignedBasePlusConstantOffset(SDValue Addr, SDValue &AlignedBase,
- int64_t &Offset)
+SDValue XCoreTargetLowering::
+lowerLoadWordFromAlignedBasePlusOffset(SDLoc DL, SDValue Chain, SDValue Base,
+ int64_t Offset, SelectionDAG &DAG) const
{
- if (Addr.getOpcode() != ISD::ADD) {
- return false;
- }
- ConstantSDNode *CN = 0;
- if (!(CN = dyn_cast<ConstantSDNode>(Addr.getOperand(1)))) {
- return false;
- }
- int64_t off = CN->getSExtValue();
- const SDValue &Base = Addr.getOperand(0);
- const SDValue *Root = &Base;
- if (Base.getOpcode() == ISD::ADD &&
- Base.getOperand(1).getOpcode() == ISD::SHL) {
- ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Base.getOperand(1)
- .getOperand(1));
- if (CN && (CN->getSExtValue() >= 2)) {
- Root = &Base.getOperand(0);
- }
- }
- if (isa<FrameIndexSDNode>(*Root)) {
- // All frame indicies are word aligned
- AlignedBase = Base;
- Offset = off;
- return true;
+ if ((Offset & 0x3) == 0) {
+ return DAG.getLoad(getPointerTy(), DL, Chain, Base, MachinePointerInfo(),
+ false, false, false, 0);
}
- if (Root->getOpcode() == XCoreISD::DPRelativeWrapper ||
- Root->getOpcode() == XCoreISD::CPRelativeWrapper) {
- // All dp / cp relative addresses are word aligned
- AlignedBase = Base;
- Offset = off;
- return true;
- }
- // Check for an aligned global variable.
- if (GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(*Root)) {
- const GlobalValue *GV = GA->getGlobal();
- if (GA->getOffset() == 0 && GV->getAlignment() >= 4) {
- AlignedBase = Base;
- Offset = off;
- return true;
- }
+ // Lower to pair of consecutive word aligned loads plus some bit shifting.
+ int32_t HighOffset = RoundUpToAlignment(Offset, 4);
+ int32_t LowOffset = HighOffset - 4;
+ SDValue LowAddr, HighAddr;
+ if (GlobalAddressSDNode *GASD =
+ dyn_cast<GlobalAddressSDNode>(Base.getNode())) {
+ LowAddr = DAG.getGlobalAddress(GASD->getGlobal(), DL, Base.getValueType(),
+ LowOffset);
+ HighAddr = DAG.getGlobalAddress(GASD->getGlobal(), DL, Base.getValueType(),
+ HighOffset);
+ } else {
+ LowAddr = DAG.getNode(ISD::ADD, DL, MVT::i32, Base,
+ DAG.getConstant(LowOffset, MVT::i32));
+ HighAddr = DAG.getNode(ISD::ADD, DL, MVT::i32, Base,
+ DAG.getConstant(HighOffset, MVT::i32));
}
- return false;
+ SDValue LowShift = DAG.getConstant((Offset - LowOffset) * 8, MVT::i32);
+ SDValue HighShift = DAG.getConstant((HighOffset - Offset) * 8, MVT::i32);
+
+ SDValue Low = DAG.getLoad(getPointerTy(), DL, Chain,
+ LowAddr, MachinePointerInfo(),
+ false, false, false, 0);
+ SDValue High = DAG.getLoad(getPointerTy(), DL, Chain,
+ HighAddr, MachinePointerInfo(),
+ false, false, false, 0);
+ SDValue LowShifted = DAG.getNode(ISD::SRL, DL, MVT::i32, Low, LowShift);
+ SDValue HighShifted = DAG.getNode(ISD::SHL, DL, MVT::i32, High, HighShift);
+ SDValue Result = DAG.getNode(ISD::OR, DL, MVT::i32, LowShifted, HighShifted);
+ Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Low.getValue(1),
+ High.getValue(1));
+ SDValue Ops[] = { Result, Chain };
+ return DAG.getMergeValues(Ops, 2, DL);
+}
+
+static bool isWordAligned(SDValue Value, SelectionDAG &DAG)
+{
+ APInt KnownZero, KnownOne;
+ DAG.ComputeMaskedBits(Value, KnownZero, KnownOne);
+ return KnownZero.countTrailingOnes() >= 2;
}
SDValue XCoreTargetLowering::
LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
+ const TargetLowering &TLI = DAG.getTargetLoweringInfo();
LoadSDNode *LD = cast<LoadSDNode>(Op);
assert(LD->getExtensionType() == ISD::NON_EXTLOAD &&
"Unexpected extension type");
if (allowsUnalignedMemoryAccesses(LD->getMemoryVT()))
return SDValue();
- unsigned ABIAlignment = getTargetData()->
+ unsigned ABIAlignment = getDataLayout()->
getABITypeAlignment(LD->getMemoryVT().getTypeForEVT(*DAG.getContext()));
// Leave aligned load alone.
if (LD->getAlignment() >= ABIAlignment)
SDValue Chain = LD->getChain();
SDValue BasePtr = LD->getBasePtr();
- DebugLoc DL = Op.getDebugLoc();
-
- SDValue Base;
- int64_t Offset;
- if (!LD->isVolatile() &&
- IsWordAlignedBasePlusConstantOffset(BasePtr, Base, Offset)) {
- if (Offset % 4 == 0) {
- // We've managed to infer better alignment information than the load
- // already has. Use an aligned load.
- //
- return DAG.getLoad(getPointerTy(), DL, Chain, BasePtr,
- MachinePointerInfo(),
- false, false, false, 0);
+ SDLoc DL(Op);
+
+ if (!LD->isVolatile()) {
+ const GlobalValue *GV;
+ int64_t Offset = 0;
+ if (DAG.isBaseWithConstantOffset(BasePtr) &&
+ isWordAligned(BasePtr->getOperand(0), DAG)) {
+ SDValue NewBasePtr = BasePtr->getOperand(0);
+ Offset = cast<ConstantSDNode>(BasePtr->getOperand(1))->getSExtValue();
+ return lowerLoadWordFromAlignedBasePlusOffset(DL, Chain, NewBasePtr,
+ Offset, DAG);
+ }
+ if (TLI.isGAPlusOffset(BasePtr.getNode(), GV, Offset) &&
+ MinAlign(GV->getAlignment(), 4) == 4) {
+ SDValue NewBasePtr = DAG.getGlobalAddress(GV, DL,
+ BasePtr->getValueType(0));
+ return lowerLoadWordFromAlignedBasePlusOffset(DL, Chain, NewBasePtr,
+ Offset, DAG);
}
- // Lower to
- // ldw low, base[offset >> 2]
- // ldw high, base[(offset >> 2) + 1]
- // shr low_shifted, low, (offset & 0x3) * 8
- // shl high_shifted, high, 32 - (offset & 0x3) * 8
- // or result, low_shifted, high_shifted
- SDValue LowOffset = DAG.getConstant(Offset & ~0x3, MVT::i32);
- SDValue HighOffset = DAG.getConstant((Offset & ~0x3) + 4, MVT::i32);
- SDValue LowShift = DAG.getConstant((Offset & 0x3) * 8, MVT::i32);
- SDValue HighShift = DAG.getConstant(32 - (Offset & 0x3) * 8, MVT::i32);
-
- SDValue LowAddr = DAG.getNode(ISD::ADD, DL, MVT::i32, Base, LowOffset);
- SDValue HighAddr = DAG.getNode(ISD::ADD, DL, MVT::i32, Base, HighOffset);
-
- SDValue Low = DAG.getLoad(getPointerTy(), DL, Chain,
- LowAddr, MachinePointerInfo(),
- false, false, false, 0);
- SDValue High = DAG.getLoad(getPointerTy(), DL, Chain,
- HighAddr, MachinePointerInfo(),
- false, false, false, 0);
- SDValue LowShifted = DAG.getNode(ISD::SRL, DL, MVT::i32, Low, LowShift);
- SDValue HighShifted = DAG.getNode(ISD::SHL, DL, MVT::i32, High, HighShift);
- SDValue Result = DAG.getNode(ISD::OR, DL, MVT::i32, LowShifted, HighShifted);
- Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Low.getValue(1),
- High.getValue(1));
- SDValue Ops[] = { Result, Chain };
- return DAG.getMergeValues(Ops, 2, DL);
}
if (LD->getAlignment() == 2) {
}
// Lower to a call to __misaligned_load(BasePtr).
- Type *IntPtrTy = getTargetData()->getIntPtrType(*DAG.getContext());
+ Type *IntPtrTy = getDataLayout()->getIntPtrType(*DAG.getContext());
TargetLowering::ArgListTy Args;
TargetLowering::ArgListEntry Entry;
if (allowsUnalignedMemoryAccesses(ST->getMemoryVT())) {
return SDValue();
}
- unsigned ABIAlignment = getTargetData()->
+ unsigned ABIAlignment = getDataLayout()->
getABITypeAlignment(ST->getMemoryVT().getTypeForEVT(*DAG.getContext()));
// Leave aligned store alone.
if (ST->getAlignment() >= ABIAlignment) {
SDValue Chain = ST->getChain();
SDValue BasePtr = ST->getBasePtr();
SDValue Value = ST->getValue();
- DebugLoc dl = Op.getDebugLoc();
+ SDLoc dl(Op);
if (ST->getAlignment() == 2) {
SDValue Low = Value;
}
// Lower to a call to __misaligned_store(BasePtr, Value).
- Type *IntPtrTy = getTargetData()->getIntPtrType(*DAG.getContext());
+ Type *IntPtrTy = getDataLayout()->getIntPtrType(*DAG.getContext());
TargetLowering::ArgListTy Args;
TargetLowering::ArgListEntry Entry;
{
assert(Op.getValueType() == MVT::i32 && Op.getOpcode() == ISD::SMUL_LOHI &&
"Unexpected operand to lower!");
- DebugLoc dl = Op.getDebugLoc();
+ SDLoc dl(Op);
SDValue LHS = Op.getOperand(0);
SDValue RHS = Op.getOperand(1);
SDValue Zero = DAG.getConstant(0, MVT::i32);
{
assert(Op.getValueType() == MVT::i32 && Op.getOpcode() == ISD::UMUL_LOHI &&
"Unexpected operand to lower!");
- DebugLoc dl = Op.getDebugLoc();
+ SDLoc dl(Op);
SDValue LHS = Op.getOperand(0);
SDValue RHS = Op.getOperand(1);
SDValue Zero = DAG.getConstant(0, MVT::i32);
} else {
return SDValue();
}
- DebugLoc dl = N->getDebugLoc();
+ SDLoc dl(N);
SDValue LL, RL, AddendL, AddendH;
LL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
Mul.getOperand(0), DAG.getConstant(0, MVT::i32));
return Result;
}
- DebugLoc dl = N->getDebugLoc();
+ SDLoc dl(N);
// Extract components
SDValue LHSL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
unsigned Opcode = (N->getOpcode() == ISD::ADD) ? XCoreISD::LADD :
XCoreISD::LSUB;
SDValue Zero = DAG.getConstant(0, MVT::i32);
- SDValue Carry = DAG.getNode(Opcode, dl, DAG.getVTList(MVT::i32, MVT::i32),
- LHSL, RHSL, Zero);
- SDValue Lo(Carry.getNode(), 1);
+ SDValue Lo = DAG.getNode(Opcode, dl, DAG.getVTList(MVT::i32, MVT::i32),
+ LHSL, RHSL, Zero);
+ SDValue Carry(Lo.getNode(), 1);
- SDValue Ignored = DAG.getNode(Opcode, dl, DAG.getVTList(MVT::i32, MVT::i32),
- LHSH, RHSH, Carry);
- SDValue Hi(Ignored.getNode(), 1);
+ SDValue Hi = DAG.getNode(Opcode, dl, DAG.getVTList(MVT::i32, MVT::i32),
+ LHSH, RHSH, Carry);
+ SDValue Ignored(Hi.getNode(), 1);
// Merge the pieces
return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
}
SDValue XCoreTargetLowering::
LowerVAARG(SDValue Op, SelectionDAG &DAG) const
{
- llvm_unreachable("unimplemented");
- // FIXME Arguments passed by reference need a extra dereference.
+ // Whist llvm does not support aggregate varargs we can ignore
+ // the possibility of the ValueType being an implicit byVal vararg.
SDNode *Node = Op.getNode();
- DebugLoc dl = Node->getDebugLoc();
- const Value *V = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
- EVT VT = Node->getValueType(0);
- SDValue VAList = DAG.getLoad(getPointerTy(), dl, Node->getOperand(0),
- Node->getOperand(1), MachinePointerInfo(V),
+ EVT VT = Node->getValueType(0); // not an aggregate
+ SDValue InChain = Node->getOperand(0);
+ SDValue VAListPtr = Node->getOperand(1);
+ EVT PtrVT = VAListPtr.getValueType();
+ const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
+ SDLoc dl(Node);
+ SDValue VAList = DAG.getLoad(PtrVT, dl, InChain,
+ VAListPtr, MachinePointerInfo(SV),
false, false, false, 0);
// Increment the pointer, VAList, to the next vararg
- SDValue Tmp3 = DAG.getNode(ISD::ADD, dl, getPointerTy(), VAList,
- DAG.getConstant(VT.getSizeInBits(),
- getPointerTy()));
+ SDValue nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAList,
+ DAG.getIntPtrConstant(VT.getSizeInBits() / 8));
// Store the incremented VAList to the legalized pointer
- Tmp3 = DAG.getStore(VAList.getValue(1), dl, Tmp3, Node->getOperand(1),
- MachinePointerInfo(V), false, false, 0);
+ InChain = DAG.getStore(VAList.getValue(1), dl, nextPtr, VAListPtr,
+ MachinePointerInfo(SV), false, false, 0);
// Load the actual argument out of the pointer VAList
- return DAG.getLoad(VT, dl, Tmp3, VAList, MachinePointerInfo(),
+ return DAG.getLoad(VT, dl, InChain, VAList, MachinePointerInfo(),
false, false, false, 0);
}
SDValue XCoreTargetLowering::
LowerVASTART(SDValue Op, SelectionDAG &DAG) const
{
- DebugLoc dl = Op.getDebugLoc();
+ SDLoc dl(Op);
// vastart stores the address of the VarArgsFrameIndex slot into the
// memory location argument
MachineFunction &MF = DAG.getMachineFunction();
SDValue XCoreTargetLowering::LowerFRAMEADDR(SDValue Op,
SelectionDAG &DAG) const {
- DebugLoc dl = Op.getDebugLoc();
+ // This nodes represent llvm.frameaddress on the DAG.
+ // It takes one operand, the index of the frame address to return.
+ // An index of zero corresponds to the current function's frame address.
+ // An index of one to the parent's frame address, and so on.
+ // Depths > 0 not supported yet!
+ if (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() > 0)
+ return SDValue();
+
+ MachineFunction &MF = DAG.getMachineFunction();
+ const TargetRegisterInfo *RegInfo = getTargetMachine().getRegisterInfo();
+ return DAG.getCopyFromReg(DAG.getEntryNode(), SDLoc(Op),
+ RegInfo->getFrameRegister(MF), MVT::i32);
+}
+
+SDValue XCoreTargetLowering::
+LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const {
+ // This nodes represent llvm.returnaddress on the DAG.
+ // It takes one operand, the index of the return address to return.
+ // An index of zero corresponds to the current function's return address.
+ // An index of one to the parent's return address, and so on.
// Depths > 0 not supported yet!
if (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() > 0)
return SDValue();
MachineFunction &MF = DAG.getMachineFunction();
+ XCoreFunctionInfo *XFI = MF.getInfo<XCoreFunctionInfo>();
+ int FI = XFI->createLRSpillSlot(MF);
+ SDValue FIN = DAG.getFrameIndex(FI, MVT::i32);
+ return DAG.getLoad(getPointerTy(), SDLoc(Op), DAG.getEntryNode(), FIN,
+ MachinePointerInfo::getFixedStack(FI), false, false,
+ false, 0);
+}
+
+SDValue XCoreTargetLowering::
+LowerFRAME_TO_ARGS_OFFSET(SDValue Op, SelectionDAG &DAG) const {
+ // This node represents offset from frame pointer to first on-stack argument.
+ // This is needed for correct stack adjustment during unwind.
+ // However, we don't know the offset until after the frame has be finalised.
+ // This is done during the XCoreFTAOElim pass.
+ return DAG.getNode(XCoreISD::FRAME_TO_ARGS_OFFSET, SDLoc(Op), MVT::i32);
+}
+
+SDValue XCoreTargetLowering::
+LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
+ // OUTCHAIN = EH_RETURN(INCHAIN, OFFSET, HANDLER)
+ // This node represents 'eh_return' gcc dwarf builtin, which is used to
+ // return from exception. The general meaning is: adjust stack by OFFSET and
+ // pass execution to HANDLER.
+ MachineFunction &MF = DAG.getMachineFunction();
+ SDValue Chain = Op.getOperand(0);
+ SDValue Offset = Op.getOperand(1);
+ SDValue Handler = Op.getOperand(2);
+ SDLoc dl(Op);
+
+ // Absolute SP = (FP + FrameToArgs) + Offset
const TargetRegisterInfo *RegInfo = getTargetMachine().getRegisterInfo();
- return DAG.getCopyFromReg(DAG.getEntryNode(), dl,
+ SDValue Stack = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
RegInfo->getFrameRegister(MF), MVT::i32);
+ SDValue FrameToArgs = DAG.getNode(XCoreISD::FRAME_TO_ARGS_OFFSET, dl,
+ MVT::i32);
+ Stack = DAG.getNode(ISD::ADD, dl, MVT::i32, Stack, FrameToArgs);
+ Stack = DAG.getNode(ISD::ADD, dl, MVT::i32, Stack, Offset);
+
+ // R0=ExceptionPointerRegister R1=ExceptionSelectorRegister
+ // which leaves 2 caller saved registers, R2 & R3 for us to use.
+ unsigned StackReg = XCore::R2;
+ unsigned HandlerReg = XCore::R3;
+
+ SDValue OutChains[] = {
+ DAG.getCopyToReg(Chain, dl, StackReg, Stack),
+ DAG.getCopyToReg(Chain, dl, HandlerReg, Handler)
+ };
+
+ Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 2);
+
+ return DAG.getNode(XCoreISD::EH_RETURN, dl, MVT::Other, Chain,
+ DAG.getRegister(StackReg, MVT::i32),
+ DAG.getRegister(HandlerReg, MVT::i32));
+
}
SDValue XCoreTargetLowering::
SDValue Addr = Trmp;
- DebugLoc dl = Op.getDebugLoc();
+ SDLoc dl(Op);
OutChains[0] = DAG.getStore(Chain, dl, DAG.getConstant(0x0a3cd805, MVT::i32),
Addr, MachinePointerInfo(TrmpAddr), false, false,
0);
return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 5);
}
+SDValue XCoreTargetLowering::
+LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const {
+ SDLoc DL(Op);
+ unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
+ switch (IntNo) {
+ case Intrinsic::xcore_crc8:
+ EVT VT = Op.getValueType();
+ SDValue Data =
+ DAG.getNode(XCoreISD::CRC8, DL, DAG.getVTList(VT, VT),
+ Op.getOperand(1), Op.getOperand(2) , Op.getOperand(3));
+ SDValue Crc(Data.getNode(), 1);
+ SDValue Results[] = { Crc, Data };
+ return DAG.getMergeValues(Results, 2, DL);
+ }
+ return SDValue();
+}
+
+SDValue XCoreTargetLowering::
+LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG) const {
+ SDLoc DL(Op);
+ return DAG.getNode(XCoreISD::MEMBARRIER, DL, MVT::Other, Op.getOperand(0));
+}
+
+SDValue XCoreTargetLowering::
+LowerATOMIC_LOAD(SDValue Op, SelectionDAG &DAG) const {
+ AtomicSDNode *N = cast<AtomicSDNode>(Op);
+ assert(N->getOpcode() == ISD::ATOMIC_LOAD && "Bad Atomic OP");
+ assert(N->getOrdering() <= Monotonic &&
+ "setInsertFencesForAtomic(true) and yet greater than Monotonic");
+ if (N->getMemoryVT() == MVT::i32) {
+ if (N->getAlignment() < 4)
+ report_fatal_error("atomic load must be aligned");
+ return DAG.getLoad(getPointerTy(), SDLoc(Op), N->getChain(),
+ N->getBasePtr(), N->getPointerInfo(),
+ N->isVolatile(), N->isNonTemporal(),
+ N->isInvariant(), N->getAlignment(),
+ N->getTBAAInfo(), N->getRanges());
+ }
+ if (N->getMemoryVT() == MVT::i16) {
+ if (N->getAlignment() < 2)
+ report_fatal_error("atomic load must be aligned");
+ return DAG.getExtLoad(ISD::EXTLOAD, SDLoc(Op), MVT::i32, N->getChain(),
+ N->getBasePtr(), N->getPointerInfo(), MVT::i16,
+ N->isVolatile(), N->isNonTemporal(),
+ N->getAlignment(), N->getTBAAInfo());
+ }
+ if (N->getMemoryVT() == MVT::i8)
+ return DAG.getExtLoad(ISD::EXTLOAD, SDLoc(Op), MVT::i32, N->getChain(),
+ N->getBasePtr(), N->getPointerInfo(), MVT::i8,
+ N->isVolatile(), N->isNonTemporal(),
+ N->getAlignment(), N->getTBAAInfo());
+ return SDValue();
+}
+
+SDValue XCoreTargetLowering::
+LowerATOMIC_STORE(SDValue Op, SelectionDAG &DAG) const {
+ AtomicSDNode *N = cast<AtomicSDNode>(Op);
+ assert(N->getOpcode() == ISD::ATOMIC_STORE && "Bad Atomic OP");
+ assert(N->getOrdering() <= Monotonic &&
+ "setInsertFencesForAtomic(true) and yet greater than Monotonic");
+ if (N->getMemoryVT() == MVT::i32) {
+ if (N->getAlignment() < 4)
+ report_fatal_error("atomic store must be aligned");
+ return DAG.getStore(N->getChain(), SDLoc(Op), N->getVal(),
+ N->getBasePtr(), N->getPointerInfo(),
+ N->isVolatile(), N->isNonTemporal(),
+ N->getAlignment(), N->getTBAAInfo());
+ }
+ if (N->getMemoryVT() == MVT::i16) {
+ if (N->getAlignment() < 2)
+ report_fatal_error("atomic store must be aligned");
+ return DAG.getTruncStore(N->getChain(), SDLoc(Op), N->getVal(),
+ N->getBasePtr(), N->getPointerInfo(), MVT::i16,
+ N->isVolatile(), N->isNonTemporal(),
+ N->getAlignment(), N->getTBAAInfo());
+ }
+ if (N->getMemoryVT() == MVT::i8)
+ return DAG.getTruncStore(N->getChain(), SDLoc(Op), N->getVal(),
+ N->getBasePtr(), N->getPointerInfo(), MVT::i8,
+ N->isVolatile(), N->isNonTemporal(),
+ N->getAlignment(), N->getTBAAInfo());
+ return SDValue();
+}
+
//===----------------------------------------------------------------------===//
// Calling Convention Implementation
//===----------------------------------------------------------------------===//
XCoreTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
SmallVectorImpl<SDValue> &InVals) const {
SelectionDAG &DAG = CLI.DAG;
- DebugLoc &dl = CLI.DL;
- SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
- SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
- SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
+ SDLoc &dl = CLI.DL;
+ SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
+ SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
+ SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
SDValue Chain = CLI.Chain;
SDValue Callee = CLI.Callee;
bool &isTailCall = CLI.IsTailCall;
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<SDValue> &OutVals,
const SmallVectorImpl<ISD::InputArg> &Ins,
- DebugLoc dl, SelectionDAG &DAG,
+ SDLoc dl, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) const {
// Analyze operands of the call, assigning locations to each operand.
unsigned NumBytes = CCInfo.getNextStackOffset();
Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes,
- getPointerTy(), true));
+ getPointerTy(), true), dl);
SmallVector<std::pair<unsigned, SDValue>, 4> RegsToPass;
SmallVector<SDValue, 12> MemOpChains;
Chain = DAG.getCALLSEQ_END(Chain,
DAG.getConstant(NumBytes, getPointerTy(), true),
DAG.getConstant(0, getPointerTy(), true),
- InFlag);
+ InFlag, dl);
InFlag = Chain.getValue(1);
// Handle result values, copying them out of physregs into vregs that we
XCoreTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::InputArg> &Ins,
- DebugLoc dl, SelectionDAG &DAG,
+ SDLoc dl, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) const {
// Assign locations to each value returned by this call.
// Formal Arguments Calling Convention Implementation
//===----------------------------------------------------------------------===//
+namespace {
+ struct ArgDataPair { SDValue SDV; ISD::ArgFlagsTy Flags; };
+}
+
/// XCore formal arguments implementation
SDValue
XCoreTargetLowering::LowerFormalArguments(SDValue Chain,
CallingConv::ID CallConv,
bool isVarArg,
const SmallVectorImpl<ISD::InputArg> &Ins,
- DebugLoc dl,
+ SDLoc dl,
SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals)
const {
bool isVarArg,
const SmallVectorImpl<ISD::InputArg>
&Ins,
- DebugLoc dl,
+ SDLoc dl,
SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) const {
MachineFunction &MF = DAG.getMachineFunction();
unsigned LRSaveSize = StackSlotSize;
+ // All getCopyFromReg ops must precede any getMemcpys to prevent the
+ // scheduler clobbering a register before it has been copied.
+ // The stages are:
+ // 1. CopyFromReg (and load) arg & vararg registers.
+ // 2. Chain CopyFromReg nodes into a TokenFactor.
+ // 3. Memcpy 'byVal' args & push final InVals.
+ // 4. Chain mem ops nodes into a TokenFactor.
+ SmallVector<SDValue, 4> CFRegNode;
+ SmallVector<ArgDataPair, 4> ArgData;
+ SmallVector<SDValue, 4> MemOps;
+
+ // 1a. CopyFromReg (and load) arg registers.
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
CCValAssign &VA = ArgLocs[i];
+ SDValue ArgIn;
if (VA.isRegLoc()) {
// Arguments passed in registers
case MVT::i32:
unsigned VReg = RegInfo.createVirtualRegister(&XCore::GRRegsRegClass);
RegInfo.addLiveIn(VA.getLocReg(), VReg);
- InVals.push_back(DAG.getCopyFromReg(Chain, dl, VReg, RegVT));
+ ArgIn = DAG.getCopyFromReg(Chain, dl, VReg, RegVT);
+ CFRegNode.push_back(ArgIn.getValue(ArgIn->getNumValues() - 1));
}
} else {
// sanity check
// Create the SelectionDAG nodes corresponding to a load
//from this parameter
SDValue FIN = DAG.getFrameIndex(FI, MVT::i32);
- InVals.push_back(DAG.getLoad(VA.getLocVT(), dl, Chain, FIN,
- MachinePointerInfo::getFixedStack(FI),
- false, false, false, 0));
+ ArgIn = DAG.getLoad(VA.getLocVT(), dl, Chain, FIN,
+ MachinePointerInfo::getFixedStack(FI),
+ false, false, false, 0);
}
+ const ArgDataPair ADP = { ArgIn, Ins[i].Flags };
+ ArgData.push_back(ADP);
}
+ // 1b. CopyFromReg vararg registers.
if (isVarArg) {
- /* Argument registers */
+ // Argument registers
static const uint16_t ArgRegs[] = {
XCore::R0, XCore::R1, XCore::R2, XCore::R3
};
unsigned FirstVAReg = CCInfo.getFirstUnallocated(ArgRegs,
array_lengthof(ArgRegs));
if (FirstVAReg < array_lengthof(ArgRegs)) {
- SmallVector<SDValue, 4> MemOps;
int offset = 0;
// Save remaining registers, storing higher register numbers at a higher
// address
unsigned VReg = RegInfo.createVirtualRegister(&XCore::GRRegsRegClass);
RegInfo.addLiveIn(ArgRegs[i], VReg);
SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
+ CFRegNode.push_back(Val.getValue(Val->getNumValues() - 1));
// Move argument from virt reg -> stack
SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
MachinePointerInfo(), false, false, 0);
MemOps.push_back(Store);
}
- if (!MemOps.empty())
- Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
- &MemOps[0], MemOps.size());
} else {
// This will point to the next argument passed via stack.
XFI->setVarArgsFrameIndex(
}
}
+ // 2. chain CopyFromReg nodes into a TokenFactor.
+ if (!CFRegNode.empty())
+ Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &CFRegNode[0],
+ CFRegNode.size());
+
+ // 3. Memcpy 'byVal' args & push final InVals.
+ // Aggregates passed "byVal" need to be copied by the callee.
+ // The callee will use a pointer to this copy, rather than the original
+ // pointer.
+ for (SmallVectorImpl<ArgDataPair>::const_iterator ArgDI = ArgData.begin(),
+ ArgDE = ArgData.end();
+ ArgDI != ArgDE; ++ArgDI) {
+ if (ArgDI->Flags.isByVal() && ArgDI->Flags.getByValSize()) {
+ unsigned Size = ArgDI->Flags.getByValSize();
+ unsigned Align = std::max(StackSlotSize, ArgDI->Flags.getByValAlign());
+ // Create a new object on the stack and copy the pointee into it.
+ int FI = MFI->CreateStackObject(Size, Align, false);
+ SDValue FIN = DAG.getFrameIndex(FI, MVT::i32);
+ InVals.push_back(FIN);
+ MemOps.push_back(DAG.getMemcpy(Chain, dl, FIN, ArgDI->SDV,
+ DAG.getConstant(Size, MVT::i32),
+ Align, false, false,
+ MachinePointerInfo(),
+ MachinePointerInfo()));
+ } else {
+ InVals.push_back(ArgDI->SDV);
+ }
+ }
+
+ // 4, chain mem ops nodes into a TokenFactor.
+ if (!MemOps.empty()) {
+ MemOps.push_back(Chain);
+ Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &MemOps[0],
+ MemOps.size());
+ }
+
return Chain;
}
CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<SDValue> &OutVals,
- DebugLoc dl, SelectionDAG &DAG) const {
+ SDLoc dl, SelectionDAG &DAG) const {
// CCValAssign - represent the assignment of
// the return value to a location
// Analyze return values.
CCInfo.AnalyzeReturn(Outs, RetCC_XCore);
- // If this is the first return lowered for this function, add
- // the regs to the liveout set for the function.
- if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
- for (unsigned i = 0; i != RVLocs.size(); ++i)
- if (RVLocs[i].isRegLoc())
- DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
- }
-
SDValue Flag;
+ SmallVector<SDValue, 4> RetOps(1, Chain);
+
+ // Return on XCore is always a "retsp 0"
+ RetOps.push_back(DAG.getConstant(0, MVT::i32));
// Copy the result values into the output registers.
for (unsigned i = 0; i != RVLocs.size(); ++i) {
// guarantee that all emitted copies are
// stuck together, avoiding something bad
Flag = Chain.getValue(1);
+ RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
}
- // Return on XCore is always a "retsp 0"
+ RetOps[0] = Chain; // Update chain.
+
+ // Add the flag if we have it.
if (Flag.getNode())
- return DAG.getNode(XCoreISD::RETSP, dl, MVT::Other,
- Chain, DAG.getConstant(0, MVT::i32), Flag);
- else // Return Void
- return DAG.getNode(XCoreISD::RETSP, dl, MVT::Other,
- Chain, DAG.getConstant(0, MVT::i32));
+ RetOps.push_back(Flag);
+
+ return DAG.getNode(XCoreISD::RETSP, dl, MVT::Other,
+ &RetOps[0], RetOps.size());
}
//===----------------------------------------------------------------------===//
SDValue XCoreTargetLowering::PerformDAGCombine(SDNode *N,
DAGCombinerInfo &DCI) const {
SelectionDAG &DAG = DCI.DAG;
- DebugLoc dl = N->getDebugLoc();
+ SDLoc dl(N);
switch (N->getOpcode()) {
default: break;
+ case ISD::INTRINSIC_VOID:
+ switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
+ case Intrinsic::xcore_outt:
+ case Intrinsic::xcore_outct:
+ case Intrinsic::xcore_chkct: {
+ SDValue OutVal = N->getOperand(3);
+ // These instructions ignore the high bits.
+ if (OutVal.hasOneUse()) {
+ unsigned BitWidth = OutVal.getValueSizeInBits();
+ APInt DemandedMask = APInt::getLowBitsSet(BitWidth, 8);
+ APInt KnownZero, KnownOne;
+ TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
+ !DCI.isBeforeLegalizeOps());
+ const TargetLowering &TLI = DAG.getTargetLoweringInfo();
+ if (TLO.ShrinkDemandedConstant(OutVal, DemandedMask) ||
+ TLI.SimplifyDemandedBits(OutVal, DemandedMask, KnownZero, KnownOne,
+ TLO))
+ DCI.CommitTargetLoweringOpt(TLO);
+ }
+ break;
+ }
+ case Intrinsic::xcore_setpt: {
+ SDValue Time = N->getOperand(3);
+ // This instruction ignores the high bits.
+ if (Time.hasOneUse()) {
+ unsigned BitWidth = Time.getValueSizeInBits();
+ APInt DemandedMask = APInt::getLowBitsSet(BitWidth, 16);
+ APInt KnownZero, KnownOne;
+ TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
+ !DCI.isBeforeLegalizeOps());
+ const TargetLowering &TLI = DAG.getTargetLoweringInfo();
+ if (TLO.ShrinkDemandedConstant(Time, DemandedMask) ||
+ TLI.SimplifyDemandedBits(Time, DemandedMask, KnownZero, KnownOne,
+ TLO))
+ DCI.CommitTargetLoweringOpt(TLO);
+ }
+ break;
+ }
+ }
+ break;
case XCoreISD::LADD: {
SDValue N0 = N->getOperand(0);
SDValue N1 = N->getOperand(1);
SDValue Carry = DAG.getConstant(0, VT);
SDValue Result = DAG.getNode(ISD::AND, dl, VT, N2,
DAG.getConstant(1, VT));
- SDValue Ops [] = { Carry, Result };
+ SDValue Ops[] = { Result, Carry };
return DAG.getMergeValues(Ops, 2, dl);
}
// fold (ladd x, 0, y) -> 0, add x, y iff carry is unused and y has only the
// low bit set
- if (N1C && N1C->isNullValue() && N->hasNUsesOfValue(0, 0)) {
+ if (N1C && N1C->isNullValue() && N->hasNUsesOfValue(0, 1)) {
APInt KnownZero, KnownOne;
APInt Mask = APInt::getHighBitsSet(VT.getSizeInBits(),
VT.getSizeInBits() - 1);
if ((KnownZero & Mask) == Mask) {
SDValue Carry = DAG.getConstant(0, VT);
SDValue Result = DAG.getNode(ISD::ADD, dl, VT, N0, N2);
- SDValue Ops [] = { Carry, Result };
+ SDValue Ops[] = { Result, Carry };
return DAG.getMergeValues(Ops, 2, dl);
}
}
SDValue Borrow = N2;
SDValue Result = DAG.getNode(ISD::SUB, dl, VT,
DAG.getConstant(0, VT), N2);
- SDValue Ops [] = { Borrow, Result };
+ SDValue Ops[] = { Result, Borrow };
return DAG.getMergeValues(Ops, 2, dl);
}
}
// fold (lsub x, 0, y) -> 0, sub x, y iff borrow is unused and y has only the
// low bit set
- if (N1C && N1C->isNullValue() && N->hasNUsesOfValue(0, 0)) {
+ if (N1C && N1C->isNullValue() && N->hasNUsesOfValue(0, 1)) {
APInt KnownZero, KnownOne;
APInt Mask = APInt::getHighBitsSet(VT.getSizeInBits(),
VT.getSizeInBits() - 1);
if ((KnownZero & Mask) == Mask) {
SDValue Borrow = DAG.getConstant(0, VT);
SDValue Result = DAG.getNode(ISD::SUB, dl, VT, N0, N2);
- SDValue Ops [] = { Borrow, Result };
+ SDValue Ops[] = { Result, Borrow };
return DAG.getMergeValues(Ops, 2, dl);
}
}
// If the high result is unused fold to add(a, b)
if (N->hasNUsesOfValue(0, 0)) {
SDValue Lo = DAG.getNode(ISD::ADD, dl, VT, N2, N3);
- SDValue Ops [] = { Lo, Lo };
+ SDValue Ops[] = { Lo, Lo };
return DAG.getMergeValues(Ops, 2, dl);
}
// Otherwise fold to ladd(a, b, 0)
- return DAG.getNode(XCoreISD::LADD, dl, DAG.getVTList(VT, VT), N2, N3, N1);
+ SDValue Result =
+ DAG.getNode(XCoreISD::LADD, dl, DAG.getVTList(VT, VT), N2, N3, N1);
+ SDValue Carry(Result.getNode(), 1);
+ SDValue Ops[] = { Carry, Result };
+ return DAG.getMergeValues(Ops, 2, dl);
}
}
break;
if (StoreBits % 8) {
break;
}
- unsigned ABIAlignment = getTargetData()->getABITypeAlignment(
+ unsigned ABIAlignment = getDataLayout()->getABITypeAlignment(
ST->getMemoryVT().getTypeForEVT(*DCI.DAG.getContext()));
unsigned Alignment = ST->getAlignment();
if (Alignment >= ABIAlignment) {
default: break;
case XCoreISD::LADD:
case XCoreISD::LSUB:
- if (Op.getResNo() == 0) {
+ if (Op.getResNo() == 1) {
// Top bits of carry / borrow are clear.
KnownZero = APInt::getHighBitsSet(KnownZero.getBitWidth(),
KnownZero.getBitWidth() - 1);
}
break;
+ case ISD::INTRINSIC_W_CHAIN:
+ {
+ unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
+ switch (IntNo) {
+ case Intrinsic::xcore_getts:
+ // High bits are known to be zero.
+ KnownZero = APInt::getHighBitsSet(KnownZero.getBitWidth(),
+ KnownZero.getBitWidth() - 16);
+ break;
+ case Intrinsic::xcore_int:
+ case Intrinsic::xcore_inct:
+ // High bits are known to be zero.
+ KnownZero = APInt::getHighBitsSet(KnownZero.getBitWidth(),
+ KnownZero.getBitWidth() - 8);
+ break;
+ case Intrinsic::xcore_testct:
+ // Result is either 0 or 1.
+ KnownZero = APInt::getHighBitsSet(KnownZero.getBitWidth(),
+ KnownZero.getBitWidth() - 1);
+ break;
+ case Intrinsic::xcore_testwct:
+ // Result is in the range 0 - 4.
+ KnownZero = APInt::getHighBitsSet(KnownZero.getBitWidth(),
+ KnownZero.getBitWidth() - 3);
+ break;
+ }
+ }
+ break;
}
}
if (Ty->getTypeID() == Type::VoidTyID)
return AM.Scale == 0 && isImmUs(AM.BaseOffs) && isImmUs4(AM.BaseOffs);
- const TargetData *TD = TM.getTargetData();
+ const DataLayout *TD = TM.getDataLayout();
unsigned Size = TD->getTypeAllocSize(Ty);
if (AM.BaseGV) {
return Size >= 4 && !AM.HasBaseReg && AM.Scale == 0 &&
std::pair<unsigned, const TargetRegisterClass*>
XCoreTargetLowering::
getRegForInlineAsmConstraint(const std::string &Constraint,
- EVT VT) const {
+ MVT VT) const {
if (Constraint.size() == 1) {
switch (Constraint[0]) {
default : break;