#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Debug.h"
X86ScalarSSEf32 = Subtarget->hasSSE1();
X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
+ bool Fast = false;
RegInfo = TM.getRegisterInfo();
if (Subtarget->is64Bit())
addRegisterClass(MVT::i64, X86::GR64RegisterClass);
- setLoadXAction(ISD::SEXTLOAD, MVT::i1, Expand);
+ setLoadXAction(ISD::SEXTLOAD, MVT::i1, Promote);
+
+ // We don't accept any truncstore of integer registers.
+ setTruncStoreAction(MVT::i64, MVT::i32, Expand);
+ setTruncStoreAction(MVT::i64, MVT::i16, Expand);
+ setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
+ setTruncStoreAction(MVT::i32, MVT::i16, Expand);
+ setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
+ setTruncStoreAction(MVT::i16, MVT::i8, Expand);
// Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
// operation.
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
setOperationAction(ISD::FREM , MVT::f64 , Expand);
- setOperationAction(ISD::FLT_ROUNDS , MVT::i32 , Custom);
+ setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
setOperationAction(ISD::CTTZ , MVT::i8 , Custom);
setOperationAction(ISD::MEMSET , MVT::Other, Custom);
setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
- // Use the default ISD::LOCATION expansion.
+ // Use the default ISD::LOCATION, ISD::DECLARE expansion.
setOperationAction(ISD::LOCATION, MVT::Other, Expand);
// FIXME - use subtarget debug flags
if (!Subtarget->isTargetDarwin() &&
setOperationAction(ISD::TRAMPOLINE, MVT::Other, Custom);
+ setOperationAction(ISD::TRAP, MVT::Other, Legal);
+
// VASTART needs to be custom lowered to use the VarArgsFrameIndex
setOperationAction(ISD::VASTART , MVT::Other, Custom);
setOperationAction(ISD::VAARG , MVT::Other, Expand);
addLegalFPImmediate(APFloat(+0.0)); // xorpd
addLegalFPImmediate(APFloat(+0.0f)); // xorps
- // Conversions to long double (in X87) go through memory.
- setConvertAction(MVT::f32, MVT::f80, Expand);
- setConvertAction(MVT::f64, MVT::f80, Expand);
-
- // Conversions from long double (in X87) go through memory.
- setConvertAction(MVT::f80, MVT::f32, Expand);
- setConvertAction(MVT::f80, MVT::f64, Expand);
+ // Floating truncations from f80 and extensions to f80 go through memory.
+ // If optimizing, we lie about this though and handle it in
+ // InstructionSelectPreprocess so that dagcombine2 can hack on these.
+ if (Fast) {
+ setConvertAction(MVT::f32, MVT::f80, Expand);
+ setConvertAction(MVT::f64, MVT::f80, Expand);
+ setConvertAction(MVT::f80, MVT::f32, Expand);
+ setConvertAction(MVT::f80, MVT::f64, Expand);
+ }
} else if (X86ScalarSSEf32) {
// Use SSE for f32, x87 for f64.
// Set up the FP register classes.
addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
- // SSE->x87 conversions go through memory.
- setConvertAction(MVT::f32, MVT::f64, Expand);
- setConvertAction(MVT::f32, MVT::f80, Expand);
-
- // x87->SSE truncations need to go through memory.
- setConvertAction(MVT::f80, MVT::f32, Expand);
- setConvertAction(MVT::f64, MVT::f32, Expand);
- // And x87->x87 truncations also.
- setConvertAction(MVT::f80, MVT::f64, Expand);
+ // SSE <-> X87 conversions go through memory. If optimizing, we lie about
+ // this though and handle it in InstructionSelectPreprocess so that
+ // dagcombine2 can hack on these.
+ if (Fast) {
+ setConvertAction(MVT::f32, MVT::f64, Expand);
+ setConvertAction(MVT::f32, MVT::f80, Expand);
+ setConvertAction(MVT::f80, MVT::f32, Expand);
+ setConvertAction(MVT::f64, MVT::f32, Expand);
+ // And x87->x87 truncations also.
+ setConvertAction(MVT::f80, MVT::f64, Expand);
+ }
if (!UnsafeFPMath) {
setOperationAction(ISD::FSIN , MVT::f64 , Expand);
setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
- // Floating truncations need to go through memory.
- setConvertAction(MVT::f80, MVT::f32, Expand);
- setConvertAction(MVT::f64, MVT::f32, Expand);
- setConvertAction(MVT::f80, MVT::f64, Expand);
+ // Floating truncations go through memory. If optimizing, we lie about
+ // this though and handle it in InstructionSelectPreprocess so that
+ // dagcombine2 can hack on these.
+ if (Fast) {
+ setConvertAction(MVT::f80, MVT::f32, Expand);
+ setConvertAction(MVT::f64, MVT::f32, Expand);
+ setConvertAction(MVT::f80, MVT::f64, Expand);
+ }
if (!UnsafeFPMath) {
setOperationAction(ISD::FSIN , MVT::f64 , Expand);
addRegisterClass(MVT::f80, X86::RFP80RegisterClass);
setOperationAction(ISD::UNDEF, MVT::f80, Expand);
setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
- setOperationAction(ISD::ConstantFP, MVT::f80, Expand);
+ {
+ setOperationAction(ISD::ConstantFP, MVT::f80, Expand);
+ APFloat TmpFlt(+0.0);
+ TmpFlt.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven);
+ addLegalFPImmediate(TmpFlt); // FLD0
+ TmpFlt.changeSign();
+ addLegalFPImmediate(TmpFlt); // FLD0/FCHS
+ APFloat TmpFlt2(+1.0);
+ TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven);
+ addLegalFPImmediate(TmpFlt2); // FLD1
+ TmpFlt2.changeSign();
+ addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
+ }
+
if (!UnsafeFPMath) {
setOperationAction(ISD::FSIN , MVT::f80 , Expand);
setOperationAction(ISD::FCOS , MVT::f80 , Expand);
AddPromotedToType (ISD::SELECT, (MVT::ValueType)VT, MVT::v2i64);
}
+ setTruncStoreAction(MVT::f64, MVT::f32, Expand);
+
// Custom lower v2i64 and v2f64 selects.
setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
allowUnalignedMemoryAccesses = true; // x86 supports it!
}
+/// getMaxByValAlign - Helper for getByValTypeAlignment to determine
+/// the desired ByVal argument alignment.
+static void getMaxByValAlign(const Type *Ty, unsigned &MaxAlign) {
+ if (MaxAlign == 16)
+ return;
+ if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
+ if (VTy->getBitWidth() == 128)
+ MaxAlign = 16;
+ } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
+ unsigned EltAlign = 0;
+ getMaxByValAlign(ATy->getElementType(), EltAlign);
+ if (EltAlign > MaxAlign)
+ MaxAlign = EltAlign;
+ } else if (const StructType *STy = dyn_cast<StructType>(Ty)) {
+ for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
+ unsigned EltAlign = 0;
+ getMaxByValAlign(STy->getElementType(i), EltAlign);
+ if (EltAlign > MaxAlign)
+ MaxAlign = EltAlign;
+ if (MaxAlign == 16)
+ break;
+ }
+ }
+ return;
+}
+
+/// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
+/// function arguments in the caller parameter area. For X86, aggregates
+/// that contain SSE vectors are placed at 16-byte boundaries while the rest
+/// are at 4-byte boundaries.
+unsigned X86TargetLowering::getByValTypeAlignment(const Type *Ty) const {
+ if (Subtarget->is64Bit())
+ return getTargetData()->getABITypeAlignment(Ty);
+ unsigned Align = 4;
+ if (Subtarget->hasSSE1())
+ getMaxByValAlign(Ty, Align);
+ return Align;
+}
/// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
/// jumptable.
/// GetPossiblePreceedingTailCall - Get preceeding X86ISD::TAILCALL node if it
/// exists skip possible ISD:TokenFactor.
static SDOperand GetPossiblePreceedingTailCall(SDOperand Chain) {
- if (Chain.getOpcode()==X86ISD::TAILCALL) {
+ if (Chain.getOpcode() == X86ISD::TAILCALL) {
return Chain;
- } else if (Chain.getOpcode()==ISD::TokenFactor) {
+ } else if (Chain.getOpcode() == ISD::TokenFactor) {
if (Chain.getNumOperands() &&
- Chain.getOperand(0).getOpcode()==X86ISD::TAILCALL)
+ Chain.getOperand(0).getOpcode() == X86ISD::TAILCALL)
return Chain.getOperand(0);
}
return Chain;
}
-
+
/// LowerRET - Lower an ISD::RET node.
SDOperand X86TargetLowering::LowerRET(SDOperand Op, SelectionDAG &DAG) {
assert((Op.getNumOperands() & 1) == 1 && "ISD::RET should have odd # args");
SDOperand TailCall = Chain;
SDOperand TargetAddress = TailCall.getOperand(1);
SDOperand StackAdjustment = TailCall.getOperand(2);
- assert ( ((TargetAddress.getOpcode() == ISD::Register &&
+ assert(((TargetAddress.getOpcode() == ISD::Register &&
(cast<RegisterSDNode>(TargetAddress)->getReg() == X86::ECX ||
cast<RegisterSDNode>(TargetAddress)->getReg() == X86::R9)) ||
TargetAddress.getOpcode() == ISD::TargetExternalSymbol ||
TargetAddress.getOpcode() == ISD::TargetGlobalAddress) &&
"Expecting an global address, external symbol, or register");
- assert( StackAdjustment.getOpcode() == ISD::Constant &&
- "Expecting a const value");
+ assert(StackAdjustment.getOpcode() == ISD::Constant &&
+ "Expecting a const value");
SmallVector<SDOperand,8> Operands;
Operands.push_back(Chain.getOperand(0));
// a register.
SDOperand Value = Op.getOperand(1);
- // If this is an FP return with ScalarSSE, we need to move the value from
- // an XMM register onto the fp-stack.
- if ((X86ScalarSSEf32 && RVLocs[0].getValVT()==MVT::f32) ||
- (X86ScalarSSEf64 && RVLocs[0].getValVT()==MVT::f64)) {
- SDOperand MemLoc;
-
- // If this is a load into a scalarsse value, don't store the loaded value
- // back to the stack, only to reload it: just replace the scalar-sse load.
- if (ISD::isNON_EXTLoad(Value.Val) &&
- (Chain == Value.getValue(1) || Chain == Value.getOperand(0))) {
- Chain = Value.getOperand(0);
- MemLoc = Value.getOperand(1);
- } else {
- // Spill the value to memory and reload it into top of stack.
- unsigned Size = MVT::getSizeInBits(RVLocs[0].getValVT())/8;
- MachineFunction &MF = DAG.getMachineFunction();
- int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
- MemLoc = DAG.getFrameIndex(SSFI, getPointerTy());
- Chain = DAG.getStore(Op.getOperand(0), Value, MemLoc, NULL, 0);
- }
- SDVTList Tys = DAG.getVTList(RVLocs[0].getValVT(), MVT::Other);
- SDOperand Ops[] = {Chain, MemLoc, DAG.getValueType(RVLocs[0].getValVT())};
- Value = DAG.getNode(X86ISD::FLD, Tys, Ops, 3);
- Chain = Value.getValue(1);
- }
+ // an XMM register onto the fp-stack. Do this with an FP_EXTEND to f80.
+ // This will get legalized into a load/store if it can't get optimized away.
+ if (isScalarFPTypeInSSEReg(RVLocs[0].getValVT()))
+ Value = DAG.getNode(ISD::FP_EXTEND, MVT::f80, Value);
SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
SDOperand Ops[] = { Chain, Value };
// Copies from the FP stack are special, as ST0 isn't a valid register
// before the fp stackifier runs.
- // Copy ST0 into an RFP register with FP_GET_RESULT.
- SDVTList Tys = DAG.getVTList(RVLocs[0].getValVT(), MVT::Other, MVT::Flag);
+ // Copy ST0 into an RFP register with FP_GET_RESULT. If this will end up
+ // in an SSE register, copy it out as F80 and do a truncate, otherwise use
+ // the specified value type.
+ MVT::ValueType GetResultTy = RVLocs[0].getValVT();
+ if (isScalarFPTypeInSSEReg(GetResultTy))
+ GetResultTy = MVT::f80;
+ SDVTList Tys = DAG.getVTList(GetResultTy, MVT::Other, MVT::Flag);
+
SDOperand GROps[] = { Chain, InFlag };
SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys, GROps, 2);
Chain = RetVal.getValue(1);
InFlag = RetVal.getValue(2);
-
- // If we are using ScalarSSE, store ST(0) to the stack and reload it into
- // an XMM register.
- if ((X86ScalarSSEf32 && RVLocs[0].getValVT() == MVT::f32) ||
- (X86ScalarSSEf64 && RVLocs[0].getValVT() == MVT::f64)) {
- SDOperand StoreLoc;
- const Value *SrcVal = 0;
- int SrcValOffset = 0;
- MVT::ValueType RetStoreVT = RVLocs[0].getValVT();
-
- // Determine where to store the value. If the call result is directly
- // used by a store, see if we can store directly into the location. In
- // this case, we'll end up producing a fst + movss[load] + movss[store] to
- // the same location, and the two movss's will be nuked as dead. This
- // optimizes common things like "*D = atof(..)" to not need an
- // intermediate stack slot.
- if (SDOperand(TheCall, 0).hasOneUse() &&
- SDOperand(TheCall, 1).hasOneUse()) {
- // In addition to direct uses, we also support a FP_ROUND that uses the
- // value, if it is directly stored somewhere.
- SDNode *User = *TheCall->use_begin();
- if (User->getOpcode() == ISD::FP_ROUND && User->hasOneUse())
- User = *User->use_begin();
-
- // Ok, we have one use of the value and one use of the chain. See if
- // they are the same node: a store.
- if (StoreSDNode *N = dyn_cast<StoreSDNode>(User)) {
- // Verify that the value being stored is either the call or a
- // truncation of the call.
- SDNode *StoreVal = N->getValue().Val;
- if (StoreVal == TheCall)
- ; // ok.
- else if (StoreVal->getOpcode() == ISD::FP_ROUND &&
- StoreVal->hasOneUse() &&
- StoreVal->getOperand(0).Val == TheCall)
- ; // ok.
- else
- N = 0; // not ok.
-
- if (N && N->getChain().Val == TheCall &&
- !N->isVolatile() && !N->isTruncatingStore() &&
- N->getAddressingMode() == ISD::UNINDEXED) {
- StoreLoc = N->getBasePtr();
- SrcVal = N->getSrcValue();
- SrcValOffset = N->getSrcValueOffset();
- RetStoreVT = N->getValue().getValueType();
- }
- }
- }
- // If we weren't able to optimize the result, just create a temporary
- // stack slot.
- if (StoreLoc.Val == 0) {
- MachineFunction &MF = DAG.getMachineFunction();
- int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
- StoreLoc = DAG.getFrameIndex(SSFI, getPointerTy());
- }
-
- // FIXME: Currently the FST is flagged to the FP_GET_RESULT. This
- // shouldn't be necessary except that RFP cannot be live across
- // multiple blocks (which could happen if a select gets lowered into
- // multiple blocks and scheduled in between them). When stackifier is
- // fixed, they can be uncoupled.
- SDOperand Ops[] = {
- Chain, RetVal, StoreLoc, DAG.getValueType(RetStoreVT), InFlag
- };
- Chain = DAG.getNode(X86ISD::FST, MVT::Other, Ops, 5);
- RetVal = DAG.getLoad(RetStoreVT, Chain,
- StoreLoc, SrcVal, SrcValOffset);
- Chain = RetVal.getValue(1);
-
- // If we optimized a truncate, then extend the result back to its desired
- // type.
- if (RVLocs[0].getValVT() != RetStoreVT)
- RetVal = DAG.getNode(ISD::FP_EXTEND, RVLocs[0].getValVT(), RetVal);
- }
+ // If we want the result in an SSE register, use an FP_TRUNCATE to get it
+ // there.
+ if (GetResultTy != RVLocs[0].getValVT())
+ RetVal = DAG.getNode(ISD::FP_ROUND, RVLocs[0].getValVT(), RetVal,
+ // This truncation won't change the value.
+ DAG.getIntPtrConstant(1));
+
ResultVals.push_back(RetVal);
}
&ResultVals[0], ResultVals.size()).Val;
}
+/// LowerCallResultToTwo64BitRegs - Lower the result values of an x86-64
+/// ISD::CALL where the results are known to be in two 64-bit registers,
+/// e.g. XMM0 and XMM1. This simplify store the two values back to the
+/// fixed stack slot allocated for StructRet.
+SDNode *X86TargetLowering::
+LowerCallResultToTwo64BitRegs(SDOperand Chain, SDOperand InFlag,
+ SDNode *TheCall, unsigned Reg1, unsigned Reg2,
+ MVT::ValueType VT, SelectionDAG &DAG) {
+ SDOperand RetVal1 = DAG.getCopyFromReg(Chain, Reg1, VT, InFlag);
+ Chain = RetVal1.getValue(1);
+ InFlag = RetVal1.getValue(2);
+ SDOperand RetVal2 = DAG.getCopyFromReg(Chain, Reg2, VT, InFlag);
+ Chain = RetVal2.getValue(1);
+ InFlag = RetVal2.getValue(2);
+ SDOperand FIN = TheCall->getOperand(5);
+ Chain = DAG.getStore(Chain, RetVal1, FIN, NULL, 0);
+ FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(8));
+ Chain = DAG.getStore(Chain, RetVal2, FIN, NULL, 0);
+ return Chain.Val;
+}
+
+/// LowerCallResultToTwoX87Regs - Lower the result values of an x86-64 ISD::CALL
+/// where the results are known to be in ST0 and ST1.
+SDNode *X86TargetLowering::
+LowerCallResultToTwoX87Regs(SDOperand Chain, SDOperand InFlag,
+ SDNode *TheCall, SelectionDAG &DAG) {
+ SmallVector<SDOperand, 8> ResultVals;
+ const MVT::ValueType VTs[] = { MVT::f80, MVT::f80, MVT::Other, MVT::Flag };
+ SDVTList Tys = DAG.getVTList(VTs, 4);
+ SDOperand Ops[] = { Chain, InFlag };
+ SDOperand RetVal = DAG.getNode(X86ISD::FP_GET_RESULT2, Tys, Ops, 2);
+ Chain = RetVal.getValue(2);
+ SDOperand FIN = TheCall->getOperand(5);
+ Chain = DAG.getStore(Chain, RetVal.getValue(1), FIN, NULL, 0);
+ FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(16));
+ Chain = DAG.getStore(Chain, RetVal, FIN, NULL, 0);
+ return Chain.Val;
+}
//===----------------------------------------------------------------------===//
// C & StdCall & Fast Calling Convention implementation
return None;
}
+
+// IsPossiblyOverwrittenArgumentOfTailCall - Check if the operand could possibly
+// be overwritten when lowering the outgoing arguments in a tail call. Currently
+// the implementation of this call is very conservative and assumes all
+// arguments sourcing from FORMAL_ARGUMENTS or a CopyFromReg with virtual
+// registers would be overwritten by direct lowering.
+// Possible improvement:
+// Check FORMAL_ARGUMENTS corresponding MERGE_VALUES for CopyFromReg nodes
+// indicating inreg passed arguments which also need not be lowered to a safe
+// stack slot.
+static bool IsPossiblyOverwrittenArgumentOfTailCall(SDOperand Op) {
+ RegisterSDNode * OpReg = NULL;
+ if (Op.getOpcode() == ISD::FORMAL_ARGUMENTS ||
+ (Op.getOpcode()== ISD::CopyFromReg &&
+ (OpReg = cast<RegisterSDNode>(Op.getOperand(1))) &&
+ OpReg->getReg() >= MRegisterInfo::FirstVirtualRegister))
+ return true;
+ return false;
+}
+
+// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
+// by "Src" to address "Dst" with size and alignment information specified by
+// the specific parameter attribute. The copy will be passed as a byval function
+// parameter.
+static SDOperand
+CreateCopyOfByValArgument(SDOperand Src, SDOperand Dst, SDOperand Chain,
+ unsigned Flags, SelectionDAG &DAG) {
+ unsigned Align = 1 <<
+ ((Flags & ISD::ParamFlags::ByValAlign) >> ISD::ParamFlags::ByValAlignOffs);
+ unsigned Size = (Flags & ISD::ParamFlags::ByValSize) >>
+ ISD::ParamFlags::ByValSizeOffs;
+ SDOperand AlignNode = DAG.getConstant(Align, MVT::i32);
+ SDOperand SizeNode = DAG.getConstant(Size, MVT::i32);
+ SDOperand AlwaysInline = DAG.getConstant(1, MVT::i32);
+ return DAG.getMemcpy(Chain, Dst, Src, SizeNode, AlignNode, AlwaysInline);
+}
+
SDOperand X86TargetLowering::LowerMemArgument(SDOperand Op, SelectionDAG &DAG,
const CCValAssign &VA,
MachineFrameInfo *MFI,
SDOperand Root, unsigned i) {
// Create the nodes corresponding to a load from this parameter slot.
+ unsigned Flags = cast<ConstantSDNode>(Op.getOperand(3 + i))->getValue();
+ bool isByVal = Flags & ISD::ParamFlags::ByVal;
+
+ // FIXME: For now, all byval parameter objects are marked mutable. This
+ // can be changed with more analysis.
int FI = MFI->CreateFixedObject(MVT::getSizeInBits(VA.getValVT())/8,
- VA.getLocMemOffset());
+ VA.getLocMemOffset(), !isByVal);
SDOperand FIN = DAG.getFrameIndex(FI, getPointerTy());
-
- unsigned Flags = cast<ConstantSDNode>(Op.getOperand(3 + i))->getValue();
-
- if (Flags & ISD::ParamFlags::ByVal)
+ if (isByVal)
return FIN;
- else
- return DAG.getLoad(VA.getValVT(), Root, FIN, NULL, 0);
+ return DAG.getLoad(VA.getValVT(), Root, FIN,
+ PseudoSourceValue::getFixedStack(), FI);
}
SDOperand
RC = X86::GR32RegisterClass;
else if (Is64Bit && RegVT == MVT::i64)
RC = X86::GR64RegisterClass;
- else if (Is64Bit && RegVT == MVT::f32)
+ else if (RegVT == MVT::f32)
RC = X86::FR32RegisterClass;
- else if (Is64Bit && RegVT == MVT::f64)
+ else if (RegVT == MVT::f64)
RC = X86::FR64RegisterClass;
else {
assert(MVT::isVector(RegVT));
SmallVector<SDOperand, 8> MemOps;
SDOperand RSFIN = DAG.getFrameIndex(RegSaveFrameIndex, getPointerTy());
SDOperand FIN = DAG.getNode(ISD::ADD, getPointerTy(), RSFIN,
- DAG.getConstant(VarArgsGPOffset,
- getPointerTy()));
+ DAG.getIntPtrConstant(VarArgsGPOffset));
for (; NumIntRegs != 6; ++NumIntRegs) {
unsigned VReg = AddLiveIn(MF, GPR64ArgRegs[NumIntRegs],
X86::GR64RegisterClass);
SDOperand Val = DAG.getCopyFromReg(Root, VReg, MVT::i64);
- SDOperand Store = DAG.getStore(Val.getValue(1), Val, FIN, NULL, 0);
+ SDOperand Store =
+ DAG.getStore(Val.getValue(1), Val, FIN,
+ PseudoSourceValue::getFixedStack(),
+ RegSaveFrameIndex);
MemOps.push_back(Store);
FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
- DAG.getConstant(8, getPointerTy()));
+ DAG.getIntPtrConstant(8));
}
// Now store the XMM (fp + vector) parameter registers.
FIN = DAG.getNode(ISD::ADD, getPointerTy(), RSFIN,
- DAG.getConstant(VarArgsFPOffset, getPointerTy()));
+ DAG.getIntPtrConstant(VarArgsFPOffset));
for (; NumXMMRegs != 8; ++NumXMMRegs) {
unsigned VReg = AddLiveIn(MF, XMMArgRegs[NumXMMRegs],
X86::VR128RegisterClass);
SDOperand Val = DAG.getCopyFromReg(Root, VReg, MVT::v4f32);
- SDOperand Store = DAG.getStore(Val.getValue(1), Val, FIN, NULL, 0);
+ SDOperand Store =
+ DAG.getStore(Val.getValue(1), Val, FIN,
+ PseudoSourceValue::getFixedStack(),
+ RegSaveFrameIndex);
MemOps.push_back(Store);
FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
- DAG.getConstant(16, getPointerTy()));
+ DAG.getIntPtrConstant(16));
}
if (!MemOps.empty())
Root = DAG.getNode(ISD::TokenFactor, MVT::Other,
&ArgValues[0], ArgValues.size()).getValue(Op.ResNo);
}
+SDOperand
+X86TargetLowering::LowerMemOpCallTo(SDOperand Op, SelectionDAG &DAG,
+ const SDOperand &StackPtr,
+ const CCValAssign &VA,
+ SDOperand Chain,
+ SDOperand Arg) {
+ unsigned LocMemOffset = VA.getLocMemOffset();
+ SDOperand PtrOff = DAG.getIntPtrConstant(LocMemOffset);
+ PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
+ SDOperand FlagsOp = Op.getOperand(6+2*VA.getValNo());
+ unsigned Flags = cast<ConstantSDNode>(FlagsOp)->getValue();
+ if (Flags & ISD::ParamFlags::ByVal) {
+ return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG);
+ }
+ return DAG.getStore(Chain, Arg, PtrOff,
+ PseudoSourceValue::getStack(), LocMemOffset);
+}
+
+/// ClassifyX86_64SRetCallReturn - Classify how to implement a x86-64
+/// struct return call to the specified function. X86-64 ABI specifies
+/// some SRet calls are actually returned in registers. Since current
+/// LLVM cannot represent multi-value calls, they are represent as
+/// calls where the results are passed in a hidden struct provided by
+/// the caller. This function examines the type of the struct to
+/// determine the correct way to implement the call.
+X86::X86_64SRet
+X86TargetLowering::ClassifyX86_64SRetCallReturn(const Function *Fn) {
+ // FIXME: Disabled for now.
+ return X86::InMemory;
+
+ const PointerType *PTy = cast<PointerType>(Fn->arg_begin()->getType());
+ const Type *RTy = PTy->getElementType();
+ unsigned Size = getTargetData()->getABITypeSize(RTy);
+ if (Size != 16 && Size != 32)
+ return X86::InMemory;
+
+ if (Size == 32) {
+ const StructType *STy = dyn_cast<StructType>(RTy);
+ if (!STy) return X86::InMemory;
+ if (STy->getNumElements() == 2 &&
+ STy->getElementType(0) == Type::X86_FP80Ty &&
+ STy->getElementType(1) == Type::X86_FP80Ty)
+ return X86::InX87;
+ }
+
+ bool AllFP = true;
+ for (Type::subtype_iterator I = RTy->subtype_begin(), E = RTy->subtype_end();
+ I != E; ++I) {
+ const Type *STy = I->get();
+ if (!STy->isFPOrFPVector()) {
+ AllFP = false;
+ break;
+ }
+ }
+
+ if (AllFP)
+ return X86::InSSE;
+ return X86::InGPR64;
+}
+
+void X86TargetLowering::X86_64AnalyzeSRetCallOperands(SDNode *TheCall,
+ CCAssignFn *Fn,
+ CCState &CCInfo) {
+ unsigned NumOps = (TheCall->getNumOperands() - 5) / 2;
+ for (unsigned i = 1; i != NumOps; ++i) {
+ MVT::ValueType ArgVT = TheCall->getOperand(5+2*i).getValueType();
+ SDOperand FlagOp = TheCall->getOperand(5+2*i+1);
+ unsigned ArgFlags =cast<ConstantSDNode>(FlagOp)->getValue();
+ if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo)) {
+ cerr << "Call operand #" << i << " has unhandled type "
+ << MVT::getValueTypeString(ArgVT) << "\n";
+ abort();
+ }
+ }
+}
+
SDOperand X86TargetLowering::LowerCALL(SDOperand Op, SelectionDAG &DAG) {
MachineFunction &MF = DAG.getMachineFunction();
SDOperand Chain = Op.getOperand(0);
&& CC == CallingConv::Fast && PerformTailCallOpt;
SDOperand Callee = Op.getOperand(4);
bool Is64Bit = Subtarget->is64Bit();
+ bool IsStructRet = CallIsStructReturn(Op);
assert(!(isVarArg && CC == CallingConv::Fast) &&
"Var args not supported with calling convention fastcc");
// Analyze operands of the call, assigning locations to each operand.
SmallVector<CCValAssign, 16> ArgLocs;
CCState CCInfo(CC, isVarArg, getTargetMachine(), ArgLocs);
- CCInfo.AnalyzeCallOperands(Op.Val, CCAssignFnForNode(Op));
+ CCAssignFn *CCFn = CCAssignFnForNode(Op);
+
+ X86::X86_64SRet SRetMethod = X86::InMemory;
+ if (Is64Bit && IsStructRet)
+ // FIXME: We can't figure out type of the sret structure for indirect
+ // calls. We need to copy more information from CallSite to the ISD::CALL
+ // node.
+ if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
+ SRetMethod =
+ ClassifyX86_64SRetCallReturn(dyn_cast<Function>(G->getGlobal()));
+
+ // UGLY HACK! For x86-64, some 128-bit aggregates are returns in a pair of
+ // registers. Unfortunately, llvm does not support i128 yet so we pretend it's
+ // a sret call.
+ if (SRetMethod != X86::InMemory)
+ X86_64AnalyzeSRetCallOperands(Op.Val, CCFn, CCInfo);
+ else
+ CCInfo.AnalyzeCallOperands(Op.Val, CCFn);
// Get a count of how many bytes are to be pushed on the stack.
unsigned NumBytes = CCInfo.getNextStackOffset();
MF.getInfo<X86MachineFunctionInfo>()->setTCReturnAddrDelta(FPDiff);
}
- Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes, getPointerTy()));
+ Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes));
SDOperand RetAddrFrIdx, NewRetAddrFrIdx;
if (IsTailCall) {
SDOperand StackPtr;
- // Walk the register/memloc assignments, inserting copies/loads.
- // For tail calls, lower arguments first to the stack slot where they would
- // normally - in case of a normal function call - be.
+ // Walk the register/memloc assignments, inserting copies/loads. For tail
+ // calls, lower arguments which could otherwise be possibly overwritten to the
+ // stack slot where they would go on normal function calls.
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
CCValAssign &VA = ArgLocs[i];
SDOperand Arg = Op.getOperand(5+2*VA.getValNo());
if (VA.isRegLoc()) {
RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
} else {
- assert(VA.isMemLoc());
- if (StackPtr.Val == 0)
- StackPtr = DAG.getRegister(getStackPtrReg(), getPointerTy());
-
- MemOpChains.push_back(LowerMemOpCallTo(Op, DAG, StackPtr, VA, Chain,
- Arg));
+ if (!IsTailCall || IsPossiblyOverwrittenArgumentOfTailCall(Arg)) {
+ assert(VA.isMemLoc());
+ if (StackPtr.Val == 0)
+ StackPtr = DAG.getCopyFromReg(Chain, X86StackPtr, getPointerTy());
+
+ MemOpChains.push_back(LowerMemOpCallTo(Op, DAG, StackPtr, VA, Chain,
+ Arg));
+ }
}
}
InFlag = Chain.getValue(1);
}
- // Copy from stack slots to stack slot of a tail called function. This needs
- // to be done because if we would lower the arguments directly to their real
- // stack slot we might end up overwriting each other.
- // TODO: To make this more efficient (sometimes saving a store/load) we could
- // analyse the arguments and emit this store/load/store sequence only for
- // arguments which would be overwritten otherwise.
+ // For tail calls lower the arguments to the 'real' stack slot.
if (IsTailCall) {
SmallVector<SDOperand, 8> MemOpChains2;
- SDOperand PtrOff;
SDOperand FIN;
int FI = 0;
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
CCValAssign &VA = ArgLocs[i];
if (!VA.isRegLoc()) {
+ assert(VA.isMemLoc());
+ SDOperand Arg = Op.getOperand(5+2*VA.getValNo());
SDOperand FlagsOp = Op.getOperand(6+2*VA.getValNo());
unsigned Flags = cast<ConstantSDNode>(FlagsOp)->getValue();
-
- // Get source stack slot.
- SDOperand PtrOff = DAG.getConstant(VA.getLocMemOffset(),
- getPointerTy());
- PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
// Create frame index.
int32_t Offset = VA.getLocMemOffset()+FPDiff;
uint32_t OpSize = (MVT::getSizeInBits(VA.getLocVT())+7)/8;
FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset);
FIN = DAG.getFrameIndex(FI, MVT::i32);
+ SDOperand Source = Arg;
+ if (IsPossiblyOverwrittenArgumentOfTailCall(Arg)) {
+ // Copy from stack slots to stack slot of a tail called function. This
+ // needs to be done because if we would lower the arguments directly
+ // to their real stack slot we might end up overwriting each other.
+ // Get source stack slot.
+ Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
+ if (StackPtr.Val == 0)
+ StackPtr = DAG.getCopyFromReg(Chain, X86StackPtr, getPointerTy());
+ Source = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, Source);
+ if ((Flags & ISD::ParamFlags::ByVal)==0)
+ Source = DAG.getLoad(VA.getValVT(), Chain, Source, NULL, 0);
+ }
+
if (Flags & ISD::ParamFlags::ByVal) {
// Copy relative to framepointer.
- unsigned Align = 1 << ((Flags & ISD::ParamFlags::ByValAlign) >>
- ISD::ParamFlags::ByValAlignOffs);
-
- unsigned Size = (Flags & ISD::ParamFlags::ByValSize) >>
- ISD::ParamFlags::ByValSizeOffs;
-
- SDOperand AlignNode = DAG.getConstant(Align, MVT::i32);
- SDOperand SizeNode = DAG.getConstant(Size, MVT::i32);
- SDOperand AlwaysInline = DAG.getConstant(1, MVT::i1);
-
- MemOpChains2.push_back(DAG.getMemcpy(Chain, FIN, PtrOff, SizeNode,
- AlignNode,AlwaysInline));
+ MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN, Chain,
+ Flags, DAG));
} else {
- SDOperand LoadedArg = DAG.getLoad(VA.getValVT(), Chain, PtrOff,
- NULL, 0);
// Store relative to framepointer.
- MemOpChains2.push_back(DAG.getStore(Chain, LoadedArg, FIN, NULL, 0));
- }
+ MemOpChains2.push_back(
+ DAG.getStore(Chain, Source, FIN,
+ PseudoSourceValue::getFixedStack(), FI));
+ }
}
}
if (!MemOpChains2.empty())
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
- &MemOpChains2[0], MemOpChains.size());
+ &MemOpChains2[0], MemOpChains2.size());
// Store the return address to the appropriate stack slot.
if (FPDiff)
if (IsTailCall) {
Ops.push_back(Chain);
- Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
- Ops.push_back(DAG.getConstant(0, getPointerTy()));
+ Ops.push_back(DAG.getIntPtrConstant(NumBytes));
+ Ops.push_back(DAG.getIntPtrConstant(0));
if (InFlag.Val)
Ops.push_back(InFlag);
Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, &Ops[0], Ops.size());
// Add argument registers to the end of the list so that they are known live
// into the call.
- if (IsTailCall)
- for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
- Ops.push_back(DAG.getRegister(RegsToPass[i].first,
- RegsToPass[i].second.getValueType()));
+ for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
+ Ops.push_back(DAG.getRegister(RegsToPass[i].first,
+ RegsToPass[i].second.getValueType()));
if (InFlag.Val)
Ops.push_back(InFlag);
unsigned NumBytesForCalleeToPush;
if (IsCalleePop(Op))
NumBytesForCalleeToPush = NumBytes; // Callee pops everything
- else if (!Is64Bit && CallIsStructReturn(Op))
+ else if (!Is64Bit && IsStructRet)
// If this is is a call to a struct-return function, the callee
// pops the hidden struct pointer, so we have to push it back.
// This is common for Darwin/X86, Linux & Mingw32 targets.
// Returns a flag for retval copy to use.
Chain = DAG.getCALLSEQ_END(Chain,
- DAG.getConstant(NumBytes, getPointerTy()),
- DAG.getConstant(NumBytesForCalleeToPush,
- getPointerTy()),
+ DAG.getIntPtrConstant(NumBytes),
+ DAG.getIntPtrConstant(NumBytesForCalleeToPush),
InFlag);
InFlag = Chain.getValue(1);
// Handle result values, copying them out of physregs into vregs that we
// return.
- return SDOperand(LowerCallResult(Chain, InFlag, Op.Val, CC, DAG), Op.ResNo);
-}
-
-
-//===----------------------------------------------------------------------===//
-// FastCall Calling Convention implementation
-//===----------------------------------------------------------------------===//
-//
-// The X86 'fastcall' calling convention passes up to two integer arguments in
-// registers (an appropriate portion of ECX/EDX), passes arguments in C order,
-// and requires that the callee pop its arguments off the stack (allowing proper
-// tail calls), and has the same return value conventions as C calling convs.
-//
-// This calling convention always arranges for the callee pop value to be 8n+4
-// bytes, which is needed for tail recursion elimination and stack alignment
-// reasons.
-
-SDOperand
-X86TargetLowering::LowerMemOpCallTo(SDOperand Op, SelectionDAG &DAG,
- const SDOperand &StackPtr,
- const CCValAssign &VA,
- SDOperand Chain,
- SDOperand Arg) {
- SDOperand PtrOff = DAG.getConstant(VA.getLocMemOffset(), getPointerTy());
- PtrOff = DAG.getNode(ISD::ADD, getPointerTy(), StackPtr, PtrOff);
- SDOperand FlagsOp = Op.getOperand(6+2*VA.getValNo());
- unsigned Flags = cast<ConstantSDNode>(FlagsOp)->getValue();
- if (Flags & ISD::ParamFlags::ByVal) {
- unsigned Align = 1 << ((Flags & ISD::ParamFlags::ByValAlign) >>
- ISD::ParamFlags::ByValAlignOffs);
-
- unsigned Size = (Flags & ISD::ParamFlags::ByValSize) >>
- ISD::ParamFlags::ByValSizeOffs;
-
- SDOperand AlignNode = DAG.getConstant(Align, MVT::i32);
- SDOperand SizeNode = DAG.getConstant(Size, MVT::i32);
- SDOperand AlwaysInline = DAG.getConstant(1, MVT::i32);
-
- return DAG.getMemcpy(Chain, PtrOff, Arg, SizeNode, AlignNode,
- AlwaysInline);
- } else {
- return DAG.getStore(Chain, Arg, PtrOff, NULL, 0);
+ switch (SRetMethod) {
+ default:
+ return SDOperand(LowerCallResult(Chain, InFlag, Op.Val, CC, DAG), Op.ResNo);
+ case X86::InGPR64:
+ return SDOperand(LowerCallResultToTwo64BitRegs(Chain, InFlag, Op.Val,
+ X86::RAX, X86::RDX,
+ MVT::i64, DAG), Op.ResNo);
+ case X86::InSSE:
+ return SDOperand(LowerCallResultToTwo64BitRegs(Chain, InFlag, Op.Val,
+ X86::XMM0, X86::XMM1,
+ MVT::f64, DAG), Op.ResNo);
+ case X86::InX87:
+ return SDOperand(LowerCallResultToTwoX87Regs(Chain, InFlag, Op.Val, DAG),
+ Op.ResNo);
}
}
+
//===----------------------------------------------------------------------===//
// Fast Calling Convention (tail call) implementation
//===----------------------------------------------------------------------===//
if (ThisElt.Val)
V = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, V, ThisElt,
- DAG.getConstant(i/2, TLI.getPointerTy()));
+ DAG.getIntPtrConstant(i/2));
}
}
First = false;
}
V = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, V, Op.getOperand(i),
- DAG.getConstant(i, TLI.getPointerTy()));
+ DAG.getIntPtrConstant(i));
}
}
Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
Vec, DAG.getNode(ISD::UNDEF, Vec.getValueType()), Mask);
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
- DAG.getConstant(0, getPointerTy()));
+ DAG.getIntPtrConstant(0));
} else if (MVT::getSizeInBits(VT) == 64) {
unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
if (Idx == 0)
Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
Vec, DAG.getNode(ISD::UNDEF, Vec.getValueType()), Mask);
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
- DAG.getConstant(0, getPointerTy()));
+ DAG.getIntPtrConstant(0));
}
return SDOperand();
if (N1.getValueType() != MVT::i32)
N1 = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, N1);
if (N2.getValueType() != MVT::i32)
- N2 = DAG.getConstant(cast<ConstantSDNode>(N2)->getValue(),getPointerTy());
+ N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getValue());
return DAG.getNode(X86ISD::PINSRW, VT, N0, N1, N2);
}
-
- N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, N1);
- unsigned Idx = cast<ConstantSDNode>(N2)->getValue();
- MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
- MVT::ValueType MaskEVT = MVT::getVectorElementType(MaskVT);
- SmallVector<SDOperand, 4> MaskVec;
- for (unsigned i = 0; i < 4; ++i)
- MaskVec.push_back(DAG.getConstant((i == Idx) ? i+4 : i, MaskEVT));
- return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, N0, N1,
- DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
- &MaskVec[0], MaskVec.size()));
+ return SDOperand();
}
SDOperand
X86TargetLowering::LowerGlobalAddress(SDOperand Op, SelectionDAG &DAG) {
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
SDOperand Result = DAG.getTargetGlobalAddress(GV, getPointerTy());
+ // If it's a debug information descriptor, don't mess with it.
+ if (DAG.isVerifiedDebugInfoDesc(Op))
+ return Result;
Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), Result);
// With PIC, the address is actually $g + Offset.
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
// the GV offset field. Platform check is inside GVRequiresExtraLoad() call
// The same applies for external symbols during PIC codegen
if (Subtarget->GVRequiresExtraLoad(GV, getTargetMachine(), false))
- Result = DAG.getLoad(getPointerTy(), DAG.getEntryNode(), Result, NULL, 0);
+ Result = DAG.getLoad(getPointerTy(), DAG.getEntryNode(), Result,
+ PseudoSourceValue::getGOT(), 0);
return Result;
}
SDOperand Offset = DAG.getNode(X86ISD::Wrapper, PtrVT, TGA);
if (GA->getGlobal()->isDeclaration()) // initial exec TLS model
- Offset = DAG.getLoad(PtrVT, DAG.getEntryNode(), Offset, NULL, 0);
+ Offset = DAG.getLoad(PtrVT, DAG.getEntryNode(), Offset,
+ PseudoSourceValue::getGOT(), 0);
// The address of the thread local variable is the add of the thread
// pointer with the offset of the variable.
int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
SDOperand Chain = DAG.getStore(DAG.getEntryNode(), Op.getOperand(0),
- StackSlot, NULL, 0);
+ StackSlot,
+ PseudoSourceValue::getFixedStack(),
+ SSFI);
// These are really Legal; caller falls through into that case.
- if (SrcVT==MVT::i32 && Op.getValueType() == MVT::f32 && X86ScalarSSEf32)
+ if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
return Result;
- if (SrcVT==MVT::i32 && Op.getValueType() == MVT::f64 && X86ScalarSSEf64)
- return Result;
- if (SrcVT==MVT::i64 && Op.getValueType() != MVT::f80 &&
+ if (SrcVT == MVT::i64 && Op.getValueType() != MVT::f80 &&
Subtarget->is64Bit())
return Result;
// Build the FILD
SDVTList Tys;
- bool useSSE = (X86ScalarSSEf32 && Op.getValueType() == MVT::f32) ||
- (X86ScalarSSEf64 && Op.getValueType() == MVT::f64);
+ bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
if (useSSE)
Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Flag);
else
Ops.push_back(DAG.getValueType(Op.getValueType()));
Ops.push_back(InFlag);
Chain = DAG.getNode(X86ISD::FST, Tys, &Ops[0], Ops.size());
- Result = DAG.getLoad(Op.getValueType(), Chain, StackSlot, NULL, 0);
+ Result = DAG.getLoad(Op.getValueType(), Chain, StackSlot,
+ PseudoSourceValue::getFixedStack(), SSFI);
}
return Result;
// These are really Legal.
if (Op.getValueType() == MVT::i32 &&
- X86ScalarSSEf32 && Op.getOperand(0).getValueType() == MVT::f32)
- return std::make_pair(SDOperand(), SDOperand());
- if (Op.getValueType() == MVT::i32 &&
- X86ScalarSSEf64 && Op.getOperand(0).getValueType() == MVT::f64)
+ isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
return std::make_pair(SDOperand(), SDOperand());
if (Subtarget->is64Bit() &&
Op.getValueType() == MVT::i64 &&
SDOperand Chain = DAG.getEntryNode();
SDOperand Value = Op.getOperand(0);
- if ((X86ScalarSSEf32 && Op.getOperand(0).getValueType() == MVT::f32) ||
- (X86ScalarSSEf64 && Op.getOperand(0).getValueType() == MVT::f64)) {
+ if (isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType())) {
assert(Op.getValueType() == MVT::i64 && "Invalid FP_TO_SINT to lower!");
- Chain = DAG.getStore(Chain, Value, StackSlot, NULL, 0);
+ Chain = DAG.getStore(Chain, Value, StackSlot,
+ PseudoSourceValue::getFixedStack(), SSFI);
SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
SDOperand Ops[] = {
Chain, StackSlot, DAG.getValueType(Op.getOperand(0).getValueType())
}
Constant *C = ConstantVector::get(CV);
SDOperand CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
- SDOperand Mask = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0,
+ SDOperand Mask = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx,
+ PseudoSourceValue::getConstantPool(), 0,
false, 16);
return DAG.getNode(X86ISD::FAND, VT, Op.getOperand(0), Mask);
}
}
Constant *C = ConstantVector::get(CV);
SDOperand CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
- SDOperand Mask = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0,
+ SDOperand Mask = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx,
+ PseudoSourceValue::getConstantPool(), 0,
false, 16);
if (MVT::isVector(VT)) {
return DAG.getNode(ISD::BIT_CONVERT, VT,
}
// And if it is bigger, shrink it first.
if (MVT::getSizeInBits(SrcVT) > MVT::getSizeInBits(VT)) {
- Op1 = DAG.getNode(ISD::FP_ROUND, VT, Op1);
+ Op1 = DAG.getNode(ISD::FP_ROUND, VT, Op1, DAG.getIntPtrConstant(1));
SrcVT = VT;
SrcTy = MVT::getTypeForValueType(SrcVT);
}
}
Constant *C = ConstantVector::get(CV);
SDOperand CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
- SDOperand Mask1 = DAG.getLoad(SrcVT, DAG.getEntryNode(), CPIdx, NULL, 0,
+ SDOperand Mask1 = DAG.getLoad(SrcVT, DAG.getEntryNode(), CPIdx,
+ PseudoSourceValue::getConstantPool(), 0,
false, 16);
SDOperand SignBit = DAG.getNode(X86ISD::FAND, SrcVT, Op1, Mask1);
DAG.getConstant(32, MVT::i32));
SignBit = DAG.getNode(ISD::BIT_CONVERT, MVT::v4f32, SignBit);
SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::f32, SignBit,
- DAG.getConstant(0, getPointerTy()));
+ DAG.getIntPtrConstant(0));
}
// Clear first operand sign bit.
}
C = ConstantVector::get(CV);
CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
- SDOperand Mask2 = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0,
+ SDOperand Mask2 = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx,
+ PseudoSourceValue::getConstantPool(), 0,
false, 16);
SDOperand Val = DAG.getNode(X86ISD::FAND, VT, Op0, Mask2);
SDOperand Cmp = Cond.getOperand(1);
unsigned Opc = Cmp.getOpcode();
MVT::ValueType VT = Op.getValueType();
+
bool IllegalFPCMov = false;
- if (VT == MVT::f32 && !X86ScalarSSEf32)
- IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSignExtended());
- else if (VT == MVT::f64 && !X86ScalarSSEf64)
- IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSignExtended());
- else if (VT == MVT::f80)
+ if (MVT::isFloatingPoint(VT) && !MVT::isVector(VT) &&
+ !isScalarFPTypeInSSEReg(VT)) // FPStack?
IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSignExtended());
+
if ((Opc == X86ISD::CMP ||
Opc == X86ISD::COMI ||
Opc == X86ISD::UCOMI) && !IllegalFPCMov) {
SDOperand Flag;
MVT::ValueType IntPtr = getPointerTy();
- MVT::ValueType SPTy = (Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
+ MVT::ValueType SPTy = Subtarget->is64Bit() ? MVT::i64 : MVT::i32;
Chain = DAG.getCopyToReg(Chain, X86::EAX, Size, Flag);
Flag = Chain.getValue(1);
if (AVT > MVT::i8) {
if (I) {
unsigned UBytes = MVT::getSizeInBits(AVT) / 8;
- Count = DAG.getConstant(I->getValue() / UBytes, getPointerTy());
+ Count = DAG.getIntPtrConstant(I->getValue() / UBytes);
BytesLeft = I->getValue() % UBytes;
} else {
assert(AVT >= MVT::i32 &&
}
unsigned UBytes = MVT::getSizeInBits(AVT) / 8;
- SDOperand Count = DAG.getConstant(Size / UBytes, getPointerTy());
+ SDOperand Count = DAG.getIntPtrConstant(Size / UBytes);
BytesLeft = Size % UBytes;
SDOperand InFlag(0, 0);
}
SDOperand X86TargetLowering::LowerVASTART(SDOperand Op, SelectionDAG &DAG) {
- SrcValueSDNode *SV = cast<SrcValueSDNode>(Op.getOperand(2));
+ const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
if (!Subtarget->is64Bit()) {
// vastart just stores the address of the VarArgsFrameIndex slot into the
// memory location argument.
SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy());
- return DAG.getStore(Op.getOperand(0), FR,Op.getOperand(1), SV->getValue(),
- SV->getOffset());
+ return DAG.getStore(Op.getOperand(0), FR,Op.getOperand(1), SV, 0);
}
// __va_list_tag:
// Store gp_offset
SDOperand Store = DAG.getStore(Op.getOperand(0),
DAG.getConstant(VarArgsGPOffset, MVT::i32),
- FIN, SV->getValue(), SV->getOffset());
+ FIN, SV, 0);
MemOps.push_back(Store);
// Store fp_offset
- FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
- DAG.getConstant(4, getPointerTy()));
+ FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(4));
Store = DAG.getStore(Op.getOperand(0),
DAG.getConstant(VarArgsFPOffset, MVT::i32),
- FIN, SV->getValue(), SV->getOffset());
+ FIN, SV, 0);
MemOps.push_back(Store);
// Store ptr to overflow_arg_area
- FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
- DAG.getConstant(4, getPointerTy()));
+ FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(4));
SDOperand OVFIN = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy());
- Store = DAG.getStore(Op.getOperand(0), OVFIN, FIN, SV->getValue(),
- SV->getOffset());
+ Store = DAG.getStore(Op.getOperand(0), OVFIN, FIN, SV, 0);
MemOps.push_back(Store);
// Store ptr to reg_save_area.
- FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN,
- DAG.getConstant(8, getPointerTy()));
+ FIN = DAG.getNode(ISD::ADD, getPointerTy(), FIN, DAG.getIntPtrConstant(8));
SDOperand RSFIN = DAG.getFrameIndex(RegSaveFrameIndex, getPointerTy());
- Store = DAG.getStore(Op.getOperand(0), RSFIN, FIN, SV->getValue(),
- SV->getOffset());
+ Store = DAG.getStore(Op.getOperand(0), RSFIN, FIN, SV, 0);
MemOps.push_back(Store);
return DAG.getNode(ISD::TokenFactor, MVT::Other, &MemOps[0], MemOps.size());
}
SDOperand Chain = Op.getOperand(0);
SDOperand DstPtr = Op.getOperand(1);
SDOperand SrcPtr = Op.getOperand(2);
- SrcValueSDNode *DstSV = cast<SrcValueSDNode>(Op.getOperand(3));
- SrcValueSDNode *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4));
+ const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
+ const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
- SrcPtr = DAG.getLoad(getPointerTy(), Chain, SrcPtr,
- SrcSV->getValue(), SrcSV->getOffset());
+ SrcPtr = DAG.getLoad(getPointerTy(), Chain, SrcPtr, SrcSV, 0);
Chain = SrcPtr.getValue(1);
for (unsigned i = 0; i < 3; ++i) {
- SDOperand Val = DAG.getLoad(MVT::i64, Chain, SrcPtr,
- SrcSV->getValue(), SrcSV->getOffset());
+ SDOperand Val = DAG.getLoad(MVT::i64, Chain, SrcPtr, SrcSV, 0);
Chain = Val.getValue(1);
- Chain = DAG.getStore(Chain, Val, DstPtr,
- DstSV->getValue(), DstSV->getOffset());
+ Chain = DAG.getStore(Chain, Val, DstPtr, DstSV, 0);
if (i == 2)
break;
SrcPtr = DAG.getNode(ISD::ADD, getPointerTy(), SrcPtr,
- DAG.getConstant(8, getPointerTy()));
+ DAG.getIntPtrConstant(8));
DstPtr = DAG.getNode(ISD::ADD, getPointerTy(), DstPtr,
- DAG.getConstant(8, getPointerTy()));
+ DAG.getIntPtrConstant(8));
}
return Chain;
}
SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
return DAG.getNode(ISD::SUB, getPointerTy(), RetAddrFI,
- DAG.getConstant(4, getPointerTy()));
+ DAG.getIntPtrConstant(4));
}
SDOperand X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDOperand Op,
if (Subtarget->is64Bit())
return SDOperand();
- return DAG.getConstant(8, getPointerTy());
+ return DAG.getIntPtrConstant(8);
}
SDOperand X86TargetLowering::LowerEH_RETURN(SDOperand Op, SelectionDAG &DAG)
getPointerTy());
SDOperand StoreAddr = DAG.getNode(ISD::SUB, getPointerTy(), Frame,
- DAG.getConstant(-4UL, getPointerTy()));
+ DAG.getIntPtrConstant(-4UL));
StoreAddr = DAG.getNode(ISD::ADD, getPointerTy(), StoreAddr, Offset);
Chain = DAG.getStore(Chain, Handler, StoreAddr, NULL, 0);
Chain = DAG.getCopyToReg(Chain, X86::ECX, StoreAddr);
SDOperand FPtr = Op.getOperand(2); // nested function
SDOperand Nest = Op.getOperand(3); // 'nest' parameter value
- SrcValueSDNode *TrmpSV = cast<SrcValueSDNode>(Op.getOperand(4));
+ const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
+
+ const X86InstrInfo *TII =
+ ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
if (Subtarget->is64Bit()) {
- return SDOperand(); // not yet supported
+ SDOperand OutChains[6];
+
+ // Large code-model.
+
+ const unsigned char JMP64r = TII->getBaseOpcodeFor(X86::JMP64r);
+ const unsigned char MOV64ri = TII->getBaseOpcodeFor(X86::MOV64ri);
+
+ const unsigned char N86R10 =
+ ((const X86RegisterInfo*)RegInfo)->getX86RegNum(X86::R10);
+ const unsigned char N86R11 =
+ ((const X86RegisterInfo*)RegInfo)->getX86RegNum(X86::R11);
+
+ const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
+
+ // Load the pointer to the nested function into R11.
+ unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
+ SDOperand Addr = Trmp;
+ OutChains[0] = DAG.getStore(Root, DAG.getConstant(OpCode, MVT::i16), Addr,
+ TrmpAddr, 0);
+
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(2, MVT::i64));
+ OutChains[1] = DAG.getStore(Root, FPtr, Addr, TrmpAddr, 2, false, 2);
+
+ // Load the 'nest' parameter value into R10.
+ // R10 is specified in X86CallingConv.td
+ OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(10, MVT::i64));
+ OutChains[2] = DAG.getStore(Root, DAG.getConstant(OpCode, MVT::i16), Addr,
+ TrmpAddr, 10);
+
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(12, MVT::i64));
+ OutChains[3] = DAG.getStore(Root, Nest, Addr, TrmpAddr, 12, false, 2);
+
+ // Jump to the nested function.
+ OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(20, MVT::i64));
+ OutChains[4] = DAG.getStore(Root, DAG.getConstant(OpCode, MVT::i16), Addr,
+ TrmpAddr, 20);
+
+ unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
+ Addr = DAG.getNode(ISD::ADD, MVT::i64, Trmp, DAG.getConstant(22, MVT::i64));
+ OutChains[5] = DAG.getStore(Root, DAG.getConstant(ModRM, MVT::i8), Addr,
+ TrmpAddr, 22);
+
+ SDOperand Ops[] =
+ { Trmp, DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains, 6) };
+ return DAG.getNode(ISD::MERGE_VALUES, Op.Val->getVTList(), Ops, 2);
} else {
- Function *Func = (Function *)
+ const Function *Func =
cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
unsigned CC = Func->getCallingConv();
unsigned NestReg;
break;
}
- const X86InstrInfo *TII =
- ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
-
SDOperand OutChains[4];
SDOperand Addr, Disp;
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(10, MVT::i32));
Disp = DAG.getNode(ISD::SUB, MVT::i32, FPtr, Addr);
- unsigned char MOV32ri = TII->getBaseOpcodeFor(X86::MOV32ri);
- unsigned char N86Reg = ((X86RegisterInfo*)RegInfo)->getX86RegNum(NestReg);
+ const unsigned char MOV32ri = TII->getBaseOpcodeFor(X86::MOV32ri);
+ const unsigned char N86Reg =
+ ((const X86RegisterInfo*)RegInfo)->getX86RegNum(NestReg);
OutChains[0] = DAG.getStore(Root, DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
- Trmp, TrmpSV->getValue(), TrmpSV->getOffset());
+ Trmp, TrmpAddr, 0);
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(1, MVT::i32));
- OutChains[1] = DAG.getStore(Root, Nest, Addr, TrmpSV->getValue(),
- TrmpSV->getOffset() + 1, false, 1);
+ OutChains[1] = DAG.getStore(Root, Nest, Addr, TrmpAddr, 1, false, 1);
- unsigned char JMP = TII->getBaseOpcodeFor(X86::JMP);
+ const unsigned char JMP = TII->getBaseOpcodeFor(X86::JMP);
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(5, MVT::i32));
OutChains[2] = DAG.getStore(Root, DAG.getConstant(JMP, MVT::i8), Addr,
- TrmpSV->getValue() + 5, TrmpSV->getOffset());
+ TrmpAddr, 5, false, 1);
Addr = DAG.getNode(ISD::ADD, MVT::i32, Trmp, DAG.getConstant(6, MVT::i32));
- OutChains[3] = DAG.getStore(Root, Disp, Addr, TrmpSV->getValue(),
- TrmpSV->getOffset() + 6, false, 1);
+ OutChains[3] = DAG.getStore(Root, Disp, Addr, TrmpAddr, 6, false, 1);
SDOperand Ops[] =
{ Trmp, DAG.getNode(ISD::TokenFactor, MVT::Other, OutChains, 4) };
}
}
-SDOperand X86TargetLowering::LowerFLT_ROUNDS(SDOperand Op, SelectionDAG &DAG) {
+SDOperand X86TargetLowering::LowerFLT_ROUNDS_(SDOperand Op, SelectionDAG &DAG) {
/*
The rounding mode is in bits 11:10 of FPSR, and has the following
settings:
case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
case ISD::TRAMPOLINE: return LowerTRAMPOLINE(Op, DAG);
- case ISD::FLT_ROUNDS: return LowerFLT_ROUNDS(Op, DAG);
+ case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
case ISD::CTLZ: return LowerCTLZ(Op, DAG);
case ISD::CTTZ: return LowerCTTZ(Op, DAG);
case X86ISD::FLD: return "X86ISD::FLD";
case X86ISD::FST: return "X86ISD::FST";
case X86ISD::FP_GET_RESULT: return "X86ISD::FP_GET_RESULT";
+ case X86ISD::FP_GET_RESULT2: return "X86ISD::FP_GET_RESULT2";
case X86ISD::FP_SET_RESULT: return "X86ISD::FP_SET_RESULT";
case X86ISD::CALL: return "X86ISD::CALL";
case X86ISD::TAILCALL: return "X86ISD::TAILCALL";
//===----------------------------------------------------------------------===//
MachineBasicBlock *
-X86TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI,
- MachineBasicBlock *BB) {
+X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
+ MachineBasicBlock *BB) {
const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
switch (MI->getOpcode()) {
default: assert(false && "Unexpected instr type to insert");
static bool isBaseAlignment16(SDNode *Base, MachineFrameInfo *MFI,
const X86Subtarget *Subtarget) {
GlobalValue *GV;
- int64_t Offset;
+ int64_t Offset = 0;
if (isGAPlusOffset(Base, GV, Offset))
return (GV->getAlignment() >= 16 && (Offset % 16) == 0);
- else {
- assert(Base->getOpcode() == ISD::FrameIndex && "Unexpected base node!");
- int BFI = cast<FrameIndexSDNode>(Base)->getIndex();
- if (BFI < 0)
- // Fixed objects do not specify alignment, however the offsets are known.
- return ((Subtarget->getStackAlignment() % 16) == 0 &&
- (MFI->getObjectOffset(BFI) % 16) == 0);
- else
- return MFI->getObjectAlignment(BFI) >= 16;
- }
+ // DAG combine handles the stack object case.
return false;
}
return SDOperand();
}
+/// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
+/// X86ISD::FXOR nodes.
+static SDOperand PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
+ assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
+ // F[X]OR(0.0, x) -> x
+ // F[X]OR(x, 0.0) -> x
+ if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
+ if (C->getValueAPF().isPosZero())
+ return N->getOperand(1);
+ if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
+ if (C->getValueAPF().isPosZero())
+ return N->getOperand(0);
+ return SDOperand();
+}
+
+/// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
+static SDOperand PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
+ // FAND(0.0, x) -> 0.0
+ // FAND(x, 0.0) -> 0.0
+ if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
+ if (C->getValueAPF().isPosZero())
+ return N->getOperand(0);
+ if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
+ if (C->getValueAPF().isPosZero())
+ return N->getOperand(1);
+ return SDOperand();
+}
+
SDOperand X86TargetLowering::PerformDAGCombine(SDNode *N,
DAGCombinerInfo &DCI) const {
SelectionDAG &DAG = DCI.DAG;
switch (N->getOpcode()) {
default: break;
- case ISD::VECTOR_SHUFFLE:
- return PerformShuffleCombine(N, DAG, Subtarget);
- case ISD::SELECT:
- return PerformSELECTCombine(N, DAG, Subtarget);
+ case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, Subtarget);
+ case ISD::SELECT: return PerformSELECTCombine(N, DAG, Subtarget);
+ case X86ISD::FXOR:
+ case X86ISD::FOR: return PerformFORCombine(N, DAG);
+ case X86ISD::FAND: return PerformFANDCombine(N, DAG);
}
return SDOperand();
return TargetLowering::getConstraintType(Constraint);
}
+/// LowerXConstraint - try to replace an X constraint, which matches anything,
+/// with another that has more specific requirements based on the type of the
+/// corresponding operand.
+void X86TargetLowering::lowerXConstraint(MVT::ValueType ConstraintVT,
+ std::string& s) const {
+ if (MVT::isFloatingPoint(ConstraintVT)) {
+ if (Subtarget->hasSSE2())
+ s = "Y";
+ else if (Subtarget->hasSSE1())
+ s = "x";
+ else
+ s = "f";
+ } else
+ return TargetLowering::lowerXConstraint(ConstraintVT, s);
+}
+
/// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
/// vector. If it is invalid, don't add anything to Ops.
void X86TargetLowering::LowerAsmOperandForConstraint(SDOperand Op,
projects / oota-llvm.git / blobdiff