MVT PtrVT = MVT::getIntegerVT(8 * TM.getPointerSize());
// Set up the TargetLowering object.
- static const MVT IntVTs[] = { MVT::i8, MVT::i16, MVT::i32, MVT::i64 };
// X86 is weird. It always uses i8 for shift amounts and setcc results.
setBooleanContents(ZeroOrOneBooleanContent);
// (low) operations are left as Legal, as there are single-result
// instructions for this in x86. Using the two-result multiply instructions
// when both high and low results are needed must be arranged by dagcombine.
- for (unsigned i = 0; i != array_lengthof(IntVTs); ++i) {
- MVT VT = IntVTs[i];
+ for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) {
setOperationAction(ISD::MULHS, VT, Expand);
setOperationAction(ISD::MULHU, VT, Expand);
setOperationAction(ISD::SDIV, VT, Expand);
setOperationAction(ISD::ATOMIC_FENCE , MVT::Other, Custom);
// Expand certain atomics
- for (unsigned i = 0; i != array_lengthof(IntVTs); ++i) {
- MVT VT = IntVTs[i];
+ for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) {
setOperationAction(ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, VT, Custom);
setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
setOperationAction(ISD::ATOMIC_STORE, VT, Custom);
// ISD::CTTZ_ZERO_UNDEF v2i64 - scalarization is faster.
// Custom lower build_vector, vector_shuffle, and extract_vector_elt.
- for (int i = MVT::v16i8; i != MVT::v2i64; ++i) {
- MVT VT = (MVT::SimpleValueType)i;
- // Do not attempt to custom lower non-power-of-2 vectors
- if (!isPowerOf2_32(VT.getVectorNumElements()))
- continue;
- // Do not attempt to custom lower non-128-bit vectors
- if (!VT.is128BitVector())
- continue;
+ for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32 }) {
setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
setOperationAction(ISD::VSELECT, VT, Custom);
}
// Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
- for (int i = MVT::v16i8; i != MVT::v2i64; ++i) {
- MVT VT = (MVT::SimpleValueType)i;
-
- // Do not attempt to promote non-128-bit vectors
- if (!VT.is128BitVector())
- continue;
-
+ for (auto VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32 }) {
setOperationAction(ISD::AND, VT, Promote);
AddPromotedToType (ISD::AND, VT, MVT::v2i64);
setOperationAction(ISD::OR, VT, Promote);
setOperationAction(ISD::VSELECT, MVT::v32i8, Legal);
// Promote v32i8, v16i16, v8i32 select, and, or, xor to v4i64.
- for (int i = MVT::v32i8; i != MVT::v4i64; ++i) {
- MVT VT = (MVT::SimpleValueType)i;
-
- // Do not attempt to promote non-256-bit vectors
- if (!VT.is256BitVector())
- continue;
-
+ for (auto VT : { MVT::v32i8, MVT::v16i16, MVT::v8i32 }) {
setOperationAction(ISD::AND, VT, Promote);
AddPromotedToType (ISD::AND, VT, MVT::v4i64);
setOperationAction(ISD::OR, VT, Promote);
setOperationAction(ISD::MSTORE, VT, Legal);
}
}
- for (int i = MVT::v32i8; i != MVT::v8i64; ++i) {
- MVT VT = (MVT::SimpleValueType)i;
-
- // Do not attempt to promote non-512-bit vectors.
- if (!VT.is512BitVector())
- continue;
-
+ for (auto VT : { MVT::v64i8, MVT::v32i16, MVT::v16i32 }) {
setOperationAction(ISD::SELECT, VT, Promote);
AddPromotedToType (ISD::SELECT, VT, MVT::v8i64);
}
setOperationAction(ISD::SIGN_EXTEND, MVT::v32i16, Custom);
setOperationAction(ISD::ZERO_EXTEND, MVT::v32i16, Custom);
setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v32i16, Custom);
+ setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v64i8, Custom);
setOperationAction(ISD::SIGN_EXTEND, MVT::v64i8, Custom);
setOperationAction(ISD::ZERO_EXTEND, MVT::v64i8, Custom);
setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v32i1, Custom);
setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::v64i8, Custom);
}
- for (int i = MVT::v32i8; i != MVT::v8i64; ++i) {
- const MVT VT = (MVT::SimpleValueType)i;
-
- const unsigned EltSize = VT.getVectorElementType().getSizeInBits();
-
- // Do not attempt to promote non-512-bit vectors.
- if (!VT.is512BitVector())
- continue;
-
- if (EltSize < 32) {
- setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
- setOperationAction(ISD::VSELECT, VT, Legal);
- }
+ for (auto VT : { MVT::v64i8, MVT::v32i16 }) {
+ setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
+ setOperationAction(ISD::VSELECT, VT, Legal);
}
}
// FIXME: We really should do custom legalization for addition and
// subtraction on x86-32 once PR3203 is fixed. We really can't do much better
// than generic legalization for 64-bit multiplication-with-overflow, though.
- for (unsigned i = 0, e = 3+Subtarget->is64Bit(); i != e; ++i) {
+ for (auto VT : { MVT::i8, MVT::i16, MVT::i32, MVT::i64 }) {
+ if (VT == MVT::i64 && !Subtarget->is64Bit())
+ continue;
// Add/Sub/Mul with overflow operations are custom lowered.
- MVT VT = IntVTs[i];
setOperationAction(ISD::SADDO, VT, Custom);
setOperationAction(ISD::UADDO, VT, Custom);
setOperationAction(ISD::SSUBO, VT, Custom);
if (!VT.isVector())
return Subtarget->hasAVX512() ? MVT::i1: MVT::i8;
- const unsigned NumElts = VT.getVectorNumElements();
- const EVT EltVT = VT.getVectorElementType();
- if (VT.is512BitVector()) {
- if (Subtarget->hasAVX512())
- if (EltVT == MVT::i32 || EltVT == MVT::i64 ||
- EltVT == MVT::f32 || EltVT == MVT::f64)
- switch(NumElts) {
- case 8: return MVT::v8i1;
- case 16: return MVT::v16i1;
- }
- if (Subtarget->hasBWI())
- if (EltVT == MVT::i8 || EltVT == MVT::i16)
- switch(NumElts) {
- case 32: return MVT::v32i1;
- case 64: return MVT::v64i1;
- }
- }
+ if (VT.isSimple()) {
+ MVT VVT = VT.getSimpleVT();
+ const unsigned NumElts = VVT.getVectorNumElements();
+ const MVT EltVT = VVT.getVectorElementType();
+ if (VVT.is512BitVector()) {
+ if (Subtarget->hasAVX512())
+ if (EltVT == MVT::i32 || EltVT == MVT::i64 ||
+ EltVT == MVT::f32 || EltVT == MVT::f64)
+ switch(NumElts) {
+ case 8: return MVT::v8i1;
+ case 16: return MVT::v16i1;
+ }
+ if (Subtarget->hasBWI())
+ if (EltVT == MVT::i8 || EltVT == MVT::i16)
+ switch(NumElts) {
+ case 32: return MVT::v32i1;
+ case 64: return MVT::v64i1;
+ }
+ }
- if (VT.is256BitVector() || VT.is128BitVector()) {
- if (Subtarget->hasVLX())
- if (EltVT == MVT::i32 || EltVT == MVT::i64 ||
- EltVT == MVT::f32 || EltVT == MVT::f64)
- switch(NumElts) {
- case 2: return MVT::v2i1;
- case 4: return MVT::v4i1;
- case 8: return MVT::v8i1;
- }
- if (Subtarget->hasBWI() && Subtarget->hasVLX())
- if (EltVT == MVT::i8 || EltVT == MVT::i16)
- switch(NumElts) {
- case 8: return MVT::v8i1;
- case 16: return MVT::v16i1;
- case 32: return MVT::v32i1;
- }
+ if (VVT.is256BitVector() || VVT.is128BitVector()) {
+ if (Subtarget->hasVLX())
+ if (EltVT == MVT::i32 || EltVT == MVT::i64 ||
+ EltVT == MVT::f32 || EltVT == MVT::f64)
+ switch(NumElts) {
+ case 2: return MVT::v2i1;
+ case 4: return MVT::v4i1;
+ case 8: return MVT::v8i1;
+ }
+ if (Subtarget->hasBWI() && Subtarget->hasVLX())
+ if (EltVT == MVT::i8 || EltVT == MVT::i16)
+ switch(NumElts) {
+ case 8: return MVT::v8i1;
+ case 16: return MVT::v16i1;
+ case 32: return MVT::v32i1;
+ }
+ }
}
return VT.changeVectorElementTypeToInteger();
return true;
}
-/// Android provides a fixed TLS slot for the SafeStack pointer.
-/// See the definition of TLS_SLOT_SAFESTACK in
-/// https://android.googlesource.com/platform/bionic/+/master/libc/private/bionic_tls.h
-bool X86TargetLowering::getSafeStackPointerLocation(unsigned &AddressSpace,
- unsigned &Offset) const {
+Value *X86TargetLowering::getSafeStackPointerLocation(IRBuilder<> &IRB) const {
if (!Subtarget->isTargetAndroid())
- return false;
+ return TargetLowering::getSafeStackPointerLocation(IRB);
+ // Android provides a fixed TLS slot for the SafeStack pointer. See the
+ // definition of TLS_SLOT_SAFESTACK in
+ // https://android.googlesource.com/platform/bionic/+/master/libc/private/bionic_tls.h
+ unsigned AddressSpace, Offset;
if (Subtarget->is64Bit()) {
// %fs:0x48, unless we're using a Kernel code model, in which case it's %gs:
Offset = 0x48;
Offset = 0x24;
AddressSpace = 256;
}
- return true;
+
+ return ConstantExpr::getIntToPtr(
+ ConstantInt::get(Type::getInt32Ty(IRB.getContext()), Offset),
+ Type::getInt8PtrTy(IRB.getContext())->getPointerTo(AddressSpace));
}
bool X86TargetLowering::isNoopAddrSpaceCast(unsigned SrcAS,
// Extract the relevant vectorWidth bits. Generate an EXTRACT_SUBVECTOR
unsigned ElemsPerChunk = vectorWidth / ElVT.getSizeInBits();
+ assert(isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2");
// This is the index of the first element of the vectorWidth-bit chunk
- // we want.
- unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / vectorWidth)
- * ElemsPerChunk);
+ // we want. Since ElemsPerChunk is a power of 2 just need to clear bits.
+ IdxVal &= ~(ElemsPerChunk - 1);
// If the input is a buildvector just emit a smaller one.
if (Vec.getOpcode() == ISD::BUILD_VECTOR)
return DAG.getNode(ISD::BUILD_VECTOR, dl, ResultVT,
- makeArrayRef(Vec->op_begin() + NormalizedIdxVal,
- ElemsPerChunk));
+ makeArrayRef(Vec->op_begin() + IdxVal, ElemsPerChunk));
- SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal, dl);
+ SDValue VecIdx = DAG.getIntPtrConstant(IdxVal, dl);
return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec, VecIdx);
}
// Insert the relevant vectorWidth bits.
unsigned ElemsPerChunk = vectorWidth/ElVT.getSizeInBits();
+ assert(isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2");
// This is the index of the first element of the vectorWidth-bit chunk
- // we want.
- unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits())/vectorWidth)
- * ElemsPerChunk);
+ // we want. Since ElemsPerChunk is a power of 2 just need to clear bits.
+ IdxVal &= ~(ElemsPerChunk - 1);
- SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal, dl);
+ SDValue VecIdx = DAG.getIntPtrConstant(IdxVal, dl);
return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec, VecIdx);
}
SDValue V1, SDValue V2,
SelectionDAG &DAG) {
int NumElts = VT.getVectorNumElements();
- bool Unpckl = true;
- bool Unpckh = true;
- bool UnpcklSwapped = true;
- bool UnpckhSwapped = true;
int NumEltsInLane = 128 / VT.getScalarSizeInBits();
+ SmallVector<int, 8> Unpckl;
+ SmallVector<int, 8> Unpckh;
for (int i = 0; i < NumElts; ++i) {
unsigned LaneStart = (i / NumEltsInLane) * NumEltsInLane;
-
int LoPos = (i % NumEltsInLane) / 2 + LaneStart + NumElts * (i % 2);
int HiPos = LoPos + NumEltsInLane / 2;
- int LoPosSwapped = (LoPos + NumElts) % (NumElts * 2);
- int HiPosSwapped = (HiPos + NumElts) % (NumElts * 2);
-
- if (Mask[i] == -1)
- continue;
- if (Mask[i] != LoPos)
- Unpckl = false;
- if (Mask[i] != HiPos)
- Unpckh = false;
- if (Mask[i] != LoPosSwapped)
- UnpcklSwapped = false;
- if (Mask[i] != HiPosSwapped)
- UnpckhSwapped = false;
- if (!Unpckl && !Unpckh && !UnpcklSwapped && !UnpckhSwapped)
- return SDValue();
+ Unpckl.push_back(LoPos);
+ Unpckh.push_back(HiPos);
}
- if (Unpckl)
+
+ if (isShuffleEquivalent(V1, V2, Mask, Unpckl))
return DAG.getNode(X86ISD::UNPCKL, DL, VT, V1, V2);
- if (Unpckh)
+ if (isShuffleEquivalent(V1, V2, Mask, Unpckh))
return DAG.getNode(X86ISD::UNPCKH, DL, VT, V1, V2);
- if (UnpcklSwapped)
+
+ // Commute and try again.
+ ShuffleVectorSDNode::commuteMask(Unpckl);
+ if (isShuffleEquivalent(V1, V2, Mask, Unpckl))
return DAG.getNode(X86ISD::UNPCKL, DL, VT, V2, V1);
- if (UnpckhSwapped)
+
+ ShuffleVectorSDNode::commuteMask(Unpckh);
+ if (isShuffleEquivalent(V1, V2, Mask, Unpckh))
return DAG.getNode(X86ISD::UNPCKH, DL, VT, V2, V1);
- llvm_unreachable("Unexpected result of UNPCK mask analysis");
return SDValue();
}
/// This doesn't do any checks for the availability of instructions for blending
/// these values. It relies on the availability of the X86ISD::BLENDI pattern to
/// be matched in the backend with the type given. What it does check for is
-/// that the shuffle mask is in fact a blend.
+/// that the shuffle mask is a blend, or convertible into a blend with zero.
static SDValue lowerVectorShuffleAsBlend(SDLoc DL, MVT VT, SDValue V1,
- SDValue V2, ArrayRef<int> Mask,
+ SDValue V2, ArrayRef<int> Original,
const X86Subtarget *Subtarget,
SelectionDAG &DAG) {
+ bool V1IsZero = ISD::isBuildVectorAllZeros(V1.getNode());
+ bool V2IsZero = ISD::isBuildVectorAllZeros(V2.getNode());
+ SmallVector<int, 8> Mask(Original.begin(), Original.end());
+ SmallBitVector Zeroable = computeZeroableShuffleElements(Mask, V1, V2);
+ bool ForceV1Zero = false, ForceV2Zero = false;
+
+ // Attempt to generate the binary blend mask. If an input is zero then
+ // we can use any lane.
+ // TODO: generalize the zero matching to any scalar like isShuffleEquivalent.
unsigned BlendMask = 0;
for (int i = 0, Size = Mask.size(); i < Size; ++i) {
- if (Mask[i] >= Size) {
- if (Mask[i] != i + Size)
- return SDValue(); // Shuffled V2 input!
+ int M = Mask[i];
+ if (M < 0)
+ continue;
+ if (M == i)
+ continue;
+ if (M == i + Size) {
BlendMask |= 1u << i;
continue;
}
- if (Mask[i] >= 0 && Mask[i] != i)
- return SDValue(); // Shuffled V1 input!
+ if (Zeroable[i]) {
+ if (V1IsZero) {
+ ForceV1Zero = true;
+ Mask[i] = i;
+ continue;
+ }
+ if (V2IsZero) {
+ ForceV2Zero = true;
+ BlendMask |= 1u << i;
+ Mask[i] = i + Size;
+ continue;
+ }
+ }
+ return SDValue(); // Shuffled input!
}
+
+ // Create a REAL zero vector - ISD::isBuildVectorAllZeros allows UNDEFs.
+ if (ForceV1Zero)
+ V1 = getZeroVector(VT, Subtarget, DAG, DL);
+ if (ForceV2Zero)
+ V2 = getZeroVector(VT, Subtarget, DAG, DL);
+
+ auto ScaleBlendMask = [](unsigned BlendMask, int Size, int Scale) {
+ unsigned ScaledMask = 0;
+ for (int i = 0; i != Size; ++i)
+ if (BlendMask & (1u << i))
+ for (int j = 0; j != Scale; ++j)
+ ScaledMask |= 1u << (i * Scale + j);
+ return ScaledMask;
+ };
+
switch (VT.SimpleTy) {
case MVT::v2f64:
case MVT::v4f32:
if (Subtarget->hasAVX2()) {
// Scale the blend by the number of 32-bit dwords per element.
int Scale = VT.getScalarSizeInBits() / 32;
- BlendMask = 0;
- for (int i = 0, Size = Mask.size(); i < Size; ++i)
- if (Mask[i] >= Size)
- for (int j = 0; j < Scale; ++j)
- BlendMask |= 1u << (i * Scale + j);
-
+ BlendMask = ScaleBlendMask(BlendMask, Mask.size(), Scale);
MVT BlendVT = VT.getSizeInBits() > 128 ? MVT::v8i32 : MVT::v4i32;
V1 = DAG.getBitcast(BlendVT, V1);
V2 = DAG.getBitcast(BlendVT, V2);
// For integer shuffles we need to expand the mask and cast the inputs to
// v8i16s prior to blending.
int Scale = 8 / VT.getVectorNumElements();
- BlendMask = 0;
- for (int i = 0, Size = Mask.size(); i < Size; ++i)
- if (Mask[i] >= Size)
- for (int j = 0; j < Scale; ++j)
- BlendMask |= 1u << (i * Scale + j);
-
+ BlendMask = ScaleBlendMask(BlendMask, Mask.size(), Scale);
V1 = DAG.getBitcast(MVT::v8i16, V1);
V2 = DAG.getBitcast(MVT::v8i16, V2);
return DAG.getBitcast(VT,
// FALLTHROUGH
case MVT::v16i8:
case MVT::v32i8: {
- assert((VT.getSizeInBits() == 128 || Subtarget->hasAVX2()) &&
+ assert((VT.is128BitVector() || Subtarget->hasAVX2()) &&
"256-bit byte-blends require AVX2 support!");
// Attempt to lower to a bitmask if we can. VPAND is faster than VPBLENDVB.
DAG.getConstant(Rotation * Scale, DL, MVT::i8)));
}
- assert(VT.getSizeInBits() == 128 &&
+ assert(VT.is128BitVector() &&
"Rotate-based lowering only supports 128-bit lowering!");
assert(Mask.size() <= 16 &&
"Can shuffle at most 16 bytes in a 128-bit vector!");
// Determine the extraction length from the part of the
// lower half that isn't zeroable.
int Len = HalfSize;
- for (; Len >= 0; --Len)
+ for (; Len > 0; --Len)
if (!Zeroable[Len - 1])
break;
assert(Len > 0 && "Zeroable shuffle mask");
M = M % Size;
// All mask elements must be in the lower half.
- if (M > HalfSize)
+ if (M >= HalfSize)
return SDValue();
if (Idx < 0 || (Src == V && Idx == (M - i))) {
if (Subtarget->hasSSE41()) {
// Not worth offseting 128-bit vectors if scale == 2, a pattern using
// PUNPCK will catch this in a later shuffle match.
- if (Offset && Scale == 2 && VT.getSizeInBits() == 128)
+ if (Offset && Scale == 2 && VT.is128BitVector())
return SDValue();
MVT ExtVT = MVT::getVectorVT(MVT::getIntegerVT(EltBits * Scale),
NumElements / Scale);
return DAG.getBitcast(VT, InputV);
}
- assert(VT.getSizeInBits() == 128 && "Only 128-bit vectors can be extended.");
+ assert(VT.is128BitVector() && "Only 128-bit vectors can be extended.");
// For any extends we can cheat for larger element sizes and use shuffle
// instructions that can fold with a load and/or copy.
// to 64-bits.
if ((Scale * EltBits) == 64 && EltBits < 32 && Subtarget->hasSSE4A()) {
assert(NumElements == (int)Mask.size() && "Unexpected shuffle mask size!");
- assert(VT.getSizeInBits() == 128 && "Unexpected vector width!");
+ assert(VT.is128BitVector() && "Unexpected vector width!");
int LoIdx = Offset * EltBits;
SDValue Lo = DAG.getNode(ISD::BITCAST, DL, MVT::v2i64,
return Blend;
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask, {0, 2}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v2f64, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {1, 3}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v2f64, V1, V2);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v2f64, Mask, V1, V2, DAG))
+ return V;
unsigned SHUFPDMask = (Mask[0] == 1) | (((Mask[1] - 2) == 1) << 1);
return DAG.getNode(X86ISD::SHUFP, DL, MVT::v2f64, V1, V2,
return Blend;
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask, {0, 2}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v2i64, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {1, 3}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v2i64, V1, V2);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v2i64, Mask, V1, V2, DAG))
+ return V;
// Try to use byte rotation instructions.
// Its more profitable for pre-SSSE3 to use shuffles/unpacks.
}
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask, {0, 4, 1, 5}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4f32, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {2, 6, 3, 7}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4f32, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {4, 0, 5, 1}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4f32, V2, V1);
- if (isShuffleEquivalent(V1, V2, Mask, {6, 2, 7, 3}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4f32, V2, V1);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v4f32, Mask, V1, V2, DAG))
+ return V;
// Otherwise fall back to a SHUFPS lowering strategy.
return lowerVectorShuffleWithSHUFPS(DL, MVT::v4f32, Mask, V1, V2, DAG);
return Masked;
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask, {0, 4, 1, 5}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4i32, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {2, 6, 3, 7}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4i32, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {4, 0, 5, 1}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4i32, V2, V1);
- if (isShuffleEquivalent(V1, V2, Mask, {6, 2, 7, 3}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4i32, V2, V1);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v4i32, Mask, V1, V2, DAG))
+ return V;
// Try to use byte rotation instructions.
// Its more profitable for pre-SSSE3 to use shuffles/unpacks.
return Shift;
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V1, Mask, {0, 0, 1, 1, 2, 2, 3, 3}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8i16, V1, V1);
- if (isShuffleEquivalent(V1, V1, Mask, {4, 4, 5, 5, 6, 6, 7, 7}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v8i16, V1, V1);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v8i16, Mask, V1, V2, DAG))
+ return V;
// Try to use byte rotation instructions.
if (SDValue Rotate = lowerVectorShuffleAsByteRotate(DL, MVT::v8i16, V1, V1,
return Masked;
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask, {0, 8, 1, 9, 2, 10, 3, 11}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8i16, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {4, 12, 5, 13, 6, 14, 7, 15}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v8i16, V1, V2);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v8i16, Mask, V1, V2, DAG))
+ return V;
// Try to use byte rotation instructions.
if (SDValue Rotate = lowerVectorShuffleAsByteRotate(
return Masked;
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask, {// Low half.
- 0, 16, 1, 17, 2, 18, 3, 19,
- // High half.
- 4, 20, 5, 21, 6, 22, 7, 23}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v16i8, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {// Low half.
- 8, 24, 9, 25, 10, 26, 11, 27,
- // High half.
- 12, 28, 13, 29, 14, 30, 15, 31}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v16i8, V1, V2);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v16i8, Mask, V1, V2, DAG))
+ return V;
// Check for SSSE3 which lets us lower all v16i8 shuffles much more directly
// with PSHUFB. It is important to do this before we attempt to generate any
ArrayRef<int> Mask,
SelectionDAG &DAG) {
// FIXME: This should probably be generalized for 512-bit vectors as well.
- assert(VT.getSizeInBits() == 256 && "Only for 256-bit vector shuffles!");
+ assert(VT.is256BitVector() && "Only for 256-bit vector shuffles!");
int LaneSize = Mask.size() / 2;
// If there are only inputs from one 128-bit lane, splitting will in fact be
DAG);
}
- // X86 has dedicated unpack instructions that can handle specific blend
- // operations: UNPCKH and UNPCKL.
- if (isShuffleEquivalent(V1, V2, Mask, {0, 4, 2, 6}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4f64, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {1, 5, 3, 7}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4f64, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {4, 0, 6, 2}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4f64, V2, V1);
- if (isShuffleEquivalent(V1, V2, Mask, {5, 1, 7, 3}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4f64, V2, V1);
+ // Use dedicated unpack instructions for masks that match their pattern.
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v4f64, Mask, V1, V2, DAG))
+ return V;
if (SDValue Blend = lowerVectorShuffleAsBlend(DL, MVT::v4f64, V1, V2, Mask,
Subtarget, DAG))
return Shift;
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask, {0, 4, 2, 6}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4i64, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {1, 5, 3, 7}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4i64, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {4, 0, 6, 2}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v4i64, V2, V1);
- if (isShuffleEquivalent(V1, V2, Mask, {5, 1, 7, 3}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v4i64, V2, V1);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v4i64, Mask, V1, V2, DAG))
+ return V;
// Try to simplify this by merging 128-bit lanes to enable a lane-based
// shuffle. However, if we have AVX2 and either inputs are already in place,
getV4X86ShuffleImm8ForMask(RepeatedMask, DL, DAG));
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask, {0, 8, 1, 9, 4, 12, 5, 13}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8f32, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {2, 10, 3, 11, 6, 14, 7, 15}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v8f32, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {8, 0, 9, 1, 12, 4, 13, 5}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8f32, V2, V1);
- if (isShuffleEquivalent(V1, V2, Mask, {10, 2, 11, 3, 14, 6, 15, 7}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v8f32, V2, V1);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v8f32, Mask, V1, V2, DAG))
+ return V;
// Otherwise, fall back to a SHUFPS sequence. Here it is important that we
// have already handled any direct blends. We also need to squash the
getV4X86ShuffleImm8ForMask(RepeatedMask, DL, DAG));
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask, {0, 8, 1, 9, 4, 12, 5, 13}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8i32, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {2, 10, 3, 11, 6, 14, 7, 15}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v8i32, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask, {8, 0, 9, 1, 12, 4, 13, 5}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v8i32, V2, V1);
- if (isShuffleEquivalent(V1, V2, Mask, {10, 2, 11, 3, 14, 6, 15, 7}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v8i32, V2, V1);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v8i32, Mask, V1, V2, DAG))
+ return V;
}
// Try to use shift instructions.
return Blend;
// Use dedicated unpack instructions for masks that match their pattern.
- if (isShuffleEquivalent(V1, V2, Mask,
- {// First 128-bit lane:
- 0, 16, 1, 17, 2, 18, 3, 19,
- // Second 128-bit lane:
- 8, 24, 9, 25, 10, 26, 11, 27}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v16i16, V1, V2);
- if (isShuffleEquivalent(V1, V2, Mask,
- {// First 128-bit lane:
- 4, 20, 5, 21, 6, 22, 7, 23,
- // Second 128-bit lane:
- 12, 28, 13, 29, 14, 30, 15, 31}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v16i16, V1, V2);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v16i16, Mask, V1, V2, DAG))
+ return V;
// Try to use shift instructions.
if (SDValue Shift =
return Blend;
// Use dedicated unpack instructions for masks that match their pattern.
- // Note that these are repeated 128-bit lane unpacks, not unpacks across all
- // 256-bit lanes.
- if (isShuffleEquivalent(
- V1, V2, Mask,
- {// First 128-bit lane:
- 0, 32, 1, 33, 2, 34, 3, 35, 4, 36, 5, 37, 6, 38, 7, 39,
- // Second 128-bit lane:
- 16, 48, 17, 49, 18, 50, 19, 51, 20, 52, 21, 53, 22, 54, 23, 55}))
- return DAG.getNode(X86ISD::UNPCKL, DL, MVT::v32i8, V1, V2);
- if (isShuffleEquivalent(
- V1, V2, Mask,
- {// First 128-bit lane:
- 8, 40, 9, 41, 10, 42, 11, 43, 12, 44, 13, 45, 14, 46, 15, 47,
- // Second 128-bit lane:
- 24, 56, 25, 57, 26, 58, 27, 59, 28, 60, 29, 61, 30, 62, 31, 63}))
- return DAG.getNode(X86ISD::UNPCKH, DL, MVT::v32i8, V1, V2);
+ if (SDValue V =
+ lowerVectorShuffleWithUNPCK(DL, MVT::v32i8, Mask, V1, V2, DAG))
+ return V;
// Try to use shift instructions.
if (SDValue Shift =
/// \brief Try to lower a vector shuffle as a 128-bit shuffles.
static SDValue lowerV4X128VectorShuffle(SDLoc DL, MVT VT,
- ArrayRef<int> Mask,
- SDValue V1, SDValue V2,
- SelectionDAG &DAG) {
+ ArrayRef<int> Mask,
+ SDValue V1, SDValue V2,
+ SelectionDAG &DAG) {
assert(VT.getScalarSizeInBits() == 64 &&
"Unexpected element type size for 128bit shuffle.");
// To handle 256 bit vector requires VLX and most probably
// function lowerV2X128VectorShuffle() is better solution.
- assert(VT.getSizeInBits() == 512 &&
- "Unexpected vector size for 128bit shuffle.");
+ assert(VT.is512BitVector() && "Unexpected vector size for 128bit shuffle.");
SmallVector<int, 4> WidenedMask;
if (!canWidenShuffleElements(Mask, WidenedMask))
/// \brief Handle lowering of 16-lane 32-bit floating point shuffles.
static SDValue lowerV16F32VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
- const X86Subtarget *Subtarget,
- SelectionDAG &DAG) {
+ const X86Subtarget *Subtarget,
+ SelectionDAG &DAG) {
SDLoc DL(Op);
assert(V1.getSimpleValueType() == MVT::v16f32 && "Bad operand type!");
assert(V2.getSimpleValueType() == MVT::v16f32 && "Bad operand type!");
/// \brief Handle lowering of 16-lane 32-bit integer shuffles.
static SDValue lowerV16I32VectorShuffle(SDValue Op, SDValue V1, SDValue V2,
- const X86Subtarget *Subtarget,
- SelectionDAG &DAG) {
+ const X86Subtarget *Subtarget,
+ SelectionDAG &DAG) {
SDLoc DL(Op);
assert(V1.getSimpleValueType() == MVT::v16i32 && "Bad operand type!");
assert(V2.getSimpleValueType() == MVT::v16i32 && "Bad operand type!");
EVT ExtVT;
switch (VT.SimpleTy) {
default:
- assert(false && "Expected a vector of i1 elements");
- break;
+ llvm_unreachable("Expected a vector of i1 elements");
case MVT::v2i1:
ExtVT = MVT::v2i64;
break;
}
// For each vector width, delegate to a specialized lowering routine.
- if (VT.getSizeInBits() == 128)
+ if (VT.is128BitVector())
return lower128BitVectorShuffle(Op, V1, V2, VT, Subtarget, DAG);
- if (VT.getSizeInBits() == 256)
+ if (VT.is256BitVector())
return lower256BitVectorShuffle(Op, V1, V2, VT, Subtarget, DAG);
- if (VT.getSizeInBits() == 512)
+ if (VT.is512BitVector())
return lower512BitVectorShuffle(Op, V1, V2, VT, Subtarget, DAG);
if (Is1BitVector)
MVT EltVT = VecVT.getVectorElementType();
unsigned ElemsPerChunk = 128 / EltVT.getSizeInBits();
+ assert(isPowerOf2_32(ElemsPerChunk) && "Elements per chunk not power of 2");
- //if (IdxVal >= NumElems/2)
- // IdxVal -= NumElems/2;
- IdxVal -= (IdxVal/ElemsPerChunk)*ElemsPerChunk;
+ // Find IdxVal modulo ElemsPerChunk. Since ElemsPerChunk is a power of 2
+ // this can be done with a mask.
+ IdxVal &= ElemsPerChunk - 1;
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec,
DAG.getConstant(IdxVal, dl, MVT::i32));
}
// Insert the element into the desired chunk.
unsigned NumEltsIn128 = 128 / EltVT.getSizeInBits();
- unsigned IdxIn128 = IdxVal - (IdxVal / NumEltsIn128) * NumEltsIn128;
+ assert(isPowerOf2_32(NumEltsIn128));
+ // Since NumEltsIn128 is a power of 2 we can use mask instead of modulo.
+ unsigned IdxIn128 = IdxVal & (NumEltsIn128 - 1);
V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, V.getValueType(), V, N1,
DAG.getConstant(IdxIn128, dl, MVT::i32));
// Since SSE has no unsigned integer comparisons, we need to flip the sign
// bits of the inputs before performing those operations.
if (FlipSigns) {
- EVT EltVT = VT.getVectorElementType();
+ MVT EltVT = VT.getVectorElementType();
SDValue SB = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()), dl,
VT);
Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SB);
}
switch (Op.getOpcode()) {
- default: break;
- case X86ISD::PCMPEQM:
- case X86ISD::PCMPGTM:
- case X86ISD::CMPM:
- case X86ISD::CMPMU:
- return DAG.getNode(ISD::AND, dl, VT, Op, VMask);
- case X86ISD::VFPCLASS:
- return DAG.getNode(ISD::OR, dl, VT, Op, VMask);
- case X86ISD::VTRUNC:
- case X86ISD::VTRUNCS:
- case X86ISD::VTRUNCUS:
- // We can't use ISD::VSELECT here because it is not always "Legal"
- // for the destination type. For example vpmovqb require only AVX512
- // and vselect that can operate on byte element type require BWI
- OpcodeSelect = X86ISD::SELECT;
- break;
+ default: break;
+ case X86ISD::PCMPEQM:
+ case X86ISD::PCMPGTM:
+ case X86ISD::CMPM:
+ case X86ISD::CMPMU:
+ return DAG.getNode(ISD::AND, dl, VT, Op, VMask);
+ case X86ISD::VFPCLASS:
+ return DAG.getNode(ISD::OR, dl, VT, Op, VMask);
+ case X86ISD::VTRUNC:
+ case X86ISD::VTRUNCS:
+ case X86ISD::VTRUNCUS:
+ // We can't use ISD::VSELECT here because it is not always "Legal"
+ // for the destination type. For example vpmovqb require only AVX512
+ // and vselect that can operate on byte element type require BWI
+ OpcodeSelect = X86ISD::SELECT;
+ break;
}
if (PreservedSrc.getOpcode() == ISD::UNDEF)
PreservedSrc = getZeroVector(VT, Subtarget, DAG, dl);
if (SupportedVectorShiftWithBaseAmnt(VT, Subtarget, Op.getOpcode())) {
SDValue BaseShAmt;
- EVT EltVT = VT.getVectorElementType();
+ MVT EltVT = VT.getVectorElementType();
if (BuildVectorSDNode *BV = dyn_cast<BuildVectorSDNode>(Amt)) {
// Check if this build_vector node is doing a splat.
// +ve/-ve Amt = rotate left/right.
// Split 256-bit integers.
- if (VT.getSizeInBits() == 256)
+ if (VT.is256BitVector())
return Lower256IntArith(Op, DAG);
- assert(VT.getSizeInBits() == 128 && "Only rotate 128-bit vectors!");
+ assert(VT.is128BitVector() && "Only rotate 128-bit vectors!");
// Attempt to rotate by immediate.
if (auto *BVAmt = dyn_cast<BuildVectorSDNode>(Amt)) {
SDValue InVec = Op->getOperand(0);
SDLoc dl(Op);
unsigned NumElts = SrcVT.getVectorNumElements();
- EVT SVT = SrcVT.getVectorElementType();
+ MVT SVT = SrcVT.getVectorElementType();
// Widen the vector in input in the case of MVT::v2i32.
// Example: from MVT::v2i32 to MVT::v4i32.
// doesn't preclude something switching to the shorter encoding post-RA.
//
// FIXME: Should teach these routines about AVX vector widths.
- if (FloatDomain && VT.getSizeInBits() == 128) {
+ if (FloatDomain && VT.is128BitVector()) {
if (Mask.equals({0, 0}) || Mask.equals({1, 1})) {
bool Lo = Mask.equals({0, 0});
unsigned Shuffle;
// We always canonicalize the 8 x i16 and 16 x i8 shuffles into their UNPCK
// variants as none of these have single-instruction variants that are
// superior to the UNPCK formulation.
- if (!FloatDomain && VT.getSizeInBits() == 128 &&
+ if (!FloatDomain && VT.is128BitVector() &&
(Mask.equals({0, 0, 1, 1, 2, 2, 3, 3}) ||
Mask.equals({4, 4, 5, 5, 6, 6, 7, 7}) ||
Mask.equals({0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7}) ||
EltNo);
}
-/// \brief Detect bitcasts between i32 to x86mmx low word. Since MMX types are
-/// special and don't usually play with other vector types, it's better to
-/// handle them early to be sure we emit efficient code by avoiding
-/// store-load conversions.
-static SDValue PerformBITCASTCombine(SDNode *N, SelectionDAG &DAG) {
- if (N->getValueType(0) != MVT::x86mmx ||
- N->getOperand(0)->getOpcode() != ISD::BUILD_VECTOR ||
- N->getOperand(0)->getValueType(0) != MVT::v2i32)
- return SDValue();
+static SDValue PerformBITCASTCombine(SDNode *N, SelectionDAG &DAG,
+ const X86Subtarget *Subtarget) {
+ SDValue N0 = N->getOperand(0);
+ EVT VT = N->getValueType(0);
- SDValue V = N->getOperand(0);
- ConstantSDNode *C = dyn_cast<ConstantSDNode>(V.getOperand(1));
- if (C && C->getZExtValue() == 0 && V.getOperand(0).getValueType() == MVT::i32)
- return DAG.getNode(X86ISD::MMX_MOVW2D, SDLoc(V.getOperand(0)),
- N->getValueType(0), V.getOperand(0));
+ // Detect bitcasts between i32 to x86mmx low word. Since MMX types are
+ // special and don't usually play with other vector types, it's better to
+ // handle them early to be sure we emit efficient code by avoiding
+ // store-load conversions.
+ if (VT == MVT::x86mmx && N0.getOpcode() == ISD::BUILD_VECTOR &&
+ N0.getValueType() == MVT::v2i32 &&
+ isa<ConstantSDNode>(N0.getOperand(1))) {
+ SDValue N00 = N0->getOperand(0);
+ if (N0.getConstantOperandVal(1) == 0 && N00.getValueType() == MVT::i32)
+ return DAG.getNode(X86ISD::MMX_MOVW2D, SDLoc(N00), VT, N00);
+ }
+
+ // Convert a bitcasted integer logic operation that has one bitcasted
+ // floating-point operand and one constant operand into a floating-point
+ // logic operation. This may create a load of the constant, but that is
+ // cheaper than materializing the constant in an integer register and
+ // transferring it to an SSE register or transferring the SSE operand to
+ // integer register and back.
+ unsigned FPOpcode;
+ switch (N0.getOpcode()) {
+ case ISD::AND: FPOpcode = X86ISD::FAND; break;
+ case ISD::OR: FPOpcode = X86ISD::FOR; break;
+ case ISD::XOR: FPOpcode = X86ISD::FXOR; break;
+ default: return SDValue();
+ }
+ if (((Subtarget->hasSSE1() && VT == MVT::f32) ||
+ (Subtarget->hasSSE2() && VT == MVT::f64)) &&
+ isa<ConstantSDNode>(N0.getOperand(1)) &&
+ N0.getOperand(0).getOpcode() == ISD::BITCAST &&
+ N0.getOperand(0).getOperand(0).getValueType() == VT) {
+ SDValue N000 = N0.getOperand(0).getOperand(0);
+ SDValue FPConst = DAG.getBitcast(VT, N0.getOperand(1));
+ return DAG.getNode(FPOpcode, SDLoc(N0), VT, N000, FPConst);
+ }
return SDValue();
}
if (VT.getScalarType() == MVT::i16)
return SDValue();
// Dynamic blending was only available from SSE4.1 onward.
- if (VT.getSizeInBits() == 128 && !Subtarget->hasSSE41())
+ if (VT.is128BitVector() && !Subtarget->hasSSE41())
return SDValue();
// Byte blends are only available in AVX2
- if (VT.getSizeInBits() == 256 && VT.getScalarType() == MVT::i8 &&
- !Subtarget->hasAVX2())
+ if (VT == MVT::v32i8 && !Subtarget->hasAVX2())
return SDValue();
assert(BitWidth >= 8 && BitWidth <= 64 && "Invalid mask size");
if (auto *AmtBV = dyn_cast<BuildVectorSDNode>(Amt))
if (auto *AmtSplat = AmtBV->getConstantSplatNode()) {
APInt ShiftAmt = AmtSplat->getAPIntValue();
- unsigned MaxAmount = VT.getVectorElementType().getSizeInBits();
+ unsigned MaxAmount =
+ VT.getSimpleVT().getVectorElementType().getSizeInBits();
// SSE2/AVX2 logical shifts always return a vector of 0s
// if the shift amount is bigger than or equal to
}
}
- if (Subtarget->hasAVX() && VT.isVector() && VT.getSizeInBits() == 256)
+ if (Subtarget->hasAVX() && VT.is256BitVector())
if (SDValue R = WidenMaskArithmetic(N, DAG, DCI, Subtarget))
return R;
case ISD::SELECT:
case X86ISD::SHRUNKBLEND:
return PerformSELECTCombine(N, DAG, DCI, Subtarget);
- case ISD::BITCAST: return PerformBITCASTCombine(N, DAG);
+ case ISD::BITCAST: return PerformBITCASTCombine(N, DAG, Subtarget);
case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI, Subtarget);
case ISD::ADD: return PerformAddCombine(N, DAG, Subtarget);
case ISD::SUB: return PerformSubCombine(N, DAG, Subtarget);
Attribute::MinSize);
return OptSize && !VT.isVector();
}
+
+void X86TargetLowering::markInRegArguments(SelectionDAG &DAG,
+ TargetLowering::ArgListTy& Args) const {
+ // The MCU psABI requires some arguments to be passed in-register.
+ // For regular calls, the inreg arguments are marked by the front-end.
+ // However, for compiler generated library calls, we have to patch this
+ // up here.
+ if (!Subtarget->isTargetMCU() || !Args.size())
+ return;
+
+ unsigned FreeRegs = 3;
+ for (auto &Arg : Args) {
+ // For library functions, we do not expect any fancy types.
+ unsigned Size = DAG.getDataLayout().getTypeSizeInBits(Arg.Ty);
+ unsigned SizeInRegs = (Size + 31) / 32;
+ if (SizeInRegs > 2 || SizeInRegs > FreeRegs)
+ continue;
+
+ Arg.isInReg = true;
+ FreeRegs -= SizeInRegs;
+ if (!FreeRegs)
+ break;
+ }
+}
projects / oota-llvm.git / blobdiff