llvm/unittests/IR/VectorTypesTest.cpp

   1 //===--- llvm/unittest/IR/VectorTypesTest.cpp - vector types unit tests ---===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/IR/DataLayout.h"
  10 #include "llvm/IR/DerivedTypes.h"
  11 #include "llvm/IR/LLVMContext.h"
  12 #include "llvm/Support/TypeSize.h"
  13 #include "gtest/gtest.h"
  14 using namespace llvm;
  15
  16 namespace {
  17
  18 #define EXPECT_VTY_EQ(LHS, RHS)                                                \
  19   do {                                                                         \
  20     ASSERT_NE(LHS, nullptr) << #LHS << " must not be null";                    \
  21     ASSERT_NE(RHS, nullptr) << #RHS << " must not be null";                    \
  22     EXPECT_EQ(LHS, RHS) << "Expect that " << #LHS << " == " << #RHS            \
  23                         << " where " << #LHS << " = " << *LHS << " and "       \
  24                         << #RHS << " = " << *RHS;                              \
  25   } while (false)
  26
  27 #define EXPECT_VTY_NE(LHS, RHS)                                                \
  28   do {                                                                         \
  29     ASSERT_NE(LHS, nullptr) << #LHS << " must not be null";                    \
  30     ASSERT_NE(RHS, nullptr) << #RHS << " must not be null";                    \
  31     EXPECT_NE(LHS, RHS) << "Expect that " << #LHS << " != " << #RHS            \
  32                         << " where " << #LHS << " = " << *LHS << " and "       \
  33                         << #RHS << " = " << *RHS;                              \
  34   } while (false)
  35
  36 TEST(VectorTypesTest, FixedLength) {
  37   LLVMContext Ctx;
  38
  39   Type *Int8Ty = Type::getInt8Ty(Ctx);
  40   Type *Int16Ty = Type::getInt16Ty(Ctx);
  41   Type *Int32Ty = Type::getInt32Ty(Ctx);
  42   Type *Int64Ty = Type::getInt64Ty(Ctx);
  43   Type *Float64Ty = Type::getDoubleTy(Ctx);
  44
  45   auto *V16Int8Ty = FixedVectorType::get(Int8Ty, 16);
  46   ASSERT_NE(nullptr, V16Int8Ty);
  47   EXPECT_EQ(V16Int8Ty->getNumElements(), 16U);
  48   EXPECT_EQ(V16Int8Ty->getElementType()->getScalarSizeInBits(), 8U);
  49
  50   auto *V8Int32Ty =
  51       dyn_cast<FixedVectorType>(VectorType::get(Int32Ty, 8, false));
  52   ASSERT_NE(nullptr, V8Int32Ty);
  53   EXPECT_EQ(V8Int32Ty->getNumElements(), 8U);
  54   EXPECT_EQ(V8Int32Ty->getElementType()->getScalarSizeInBits(), 32U);
  55
  56   auto *V8Int8Ty =
  57       dyn_cast<FixedVectorType>(VectorType::get(Int8Ty, V8Int32Ty));
  58   EXPECT_VTY_NE(V8Int32Ty, V8Int8Ty);
  59   EXPECT_EQ(V8Int8Ty->getElementCount(), V8Int32Ty->getElementCount());
  60   EXPECT_EQ(V8Int8Ty->getElementType()->getScalarSizeInBits(), 8U);
  61
  62   auto *V8Int32Ty2 =
  63       dyn_cast<FixedVectorType>(VectorType::get(Int32Ty, V8Int32Ty));
  64   EXPECT_VTY_EQ(V8Int32Ty, V8Int32Ty2);
  65
  66   auto *V8Int16Ty = dyn_cast<FixedVectorType>(
  67       VectorType::get(Int16Ty, ElementCount::getFixed(8)));
  68   ASSERT_NE(nullptr, V8Int16Ty);
  69   EXPECT_EQ(V8Int16Ty->getNumElements(), 8U);
  70   EXPECT_EQ(V8Int16Ty->getElementType()->getScalarSizeInBits(), 16U);
  71
  72   auto EltCnt = ElementCount::getFixed(4);
  73   auto *V4Int64Ty = dyn_cast<FixedVectorType>(VectorType::get(Int64Ty, EltCnt));
  74   ASSERT_NE(nullptr, V4Int64Ty);
  75   EXPECT_EQ(V4Int64Ty->getNumElements(), 4U);
  76   EXPECT_EQ(V4Int64Ty->getElementType()->getScalarSizeInBits(), 64U);
  77
  78   auto *V2Int64Ty = dyn_cast<FixedVectorType>(
  79       VectorType::get(Int64Ty, EltCnt.divideCoefficientBy(2)));
  80   ASSERT_NE(nullptr, V2Int64Ty);
  81   EXPECT_EQ(V2Int64Ty->getNumElements(), 2U);
  82   EXPECT_EQ(V2Int64Ty->getElementType()->getScalarSizeInBits(), 64U);
  83
  84   auto *V8Int64Ty =
  85       dyn_cast<FixedVectorType>(VectorType::get(Int64Ty, EltCnt * 2));
  86   ASSERT_NE(nullptr, V8Int64Ty);
  87   EXPECT_EQ(V8Int64Ty->getNumElements(), 8U);
  88   EXPECT_EQ(V8Int64Ty->getElementType()->getScalarSizeInBits(), 64U);
  89
  90   auto *V4Float64Ty =
  91       dyn_cast<FixedVectorType>(VectorType::get(Float64Ty, EltCnt));
  92   ASSERT_NE(nullptr, V4Float64Ty);
  93   EXPECT_EQ(V4Float64Ty->getNumElements(), 4U);
  94   EXPECT_EQ(V4Float64Ty->getElementType()->getScalarSizeInBits(), 64U);
  95
  96   auto *ExtTy = dyn_cast<FixedVectorType>(
  97       VectorType::getExtendedElementVectorType(V8Int16Ty));
  98   EXPECT_VTY_EQ(ExtTy, V8Int32Ty);
  99   EXPECT_EQ(ExtTy->getNumElements(), 8U);
 100   EXPECT_EQ(ExtTy->getElementType()->getScalarSizeInBits(), 32U);
 101
 102   auto *TruncTy = dyn_cast<FixedVectorType>(
 103       VectorType::getTruncatedElementVectorType(V8Int32Ty));
 104   EXPECT_VTY_EQ(TruncTy, V8Int16Ty);
 105   EXPECT_EQ(TruncTy->getNumElements(), 8U);
 106   EXPECT_EQ(TruncTy->getElementType()->getScalarSizeInBits(), 16U);
 107
 108   auto *HalvedTy = dyn_cast<FixedVectorType>(
 109       VectorType::getHalfElementsVectorType(V4Int64Ty));
 110   EXPECT_VTY_EQ(HalvedTy, V2Int64Ty);
 111   EXPECT_EQ(HalvedTy->getNumElements(), 2U);
 112   EXPECT_EQ(HalvedTy->getElementType()->getScalarSizeInBits(), 64U);
 113
 114   auto *DoubledTy = dyn_cast<FixedVectorType>(
 115       VectorType::getDoubleElementsVectorType(V4Int64Ty));
 116   EXPECT_VTY_EQ(DoubledTy, V8Int64Ty);
 117   EXPECT_EQ(DoubledTy->getNumElements(), 8U);
 118   EXPECT_EQ(DoubledTy->getElementType()->getScalarSizeInBits(), 64U);
 119
 120   auto *ConvTy = dyn_cast<FixedVectorType>(VectorType::getInteger(V4Float64Ty));
 121   EXPECT_VTY_EQ(ConvTy, V4Int64Ty);
 122   EXPECT_EQ(ConvTy->getNumElements(), 4U);
 123   EXPECT_EQ(ConvTy->getElementType()->getScalarSizeInBits(), 64U);
 124
 125   EltCnt = V8Int64Ty->getElementCount();
 126   EXPECT_EQ(EltCnt.getKnownMinValue(), 8U);
 127   ASSERT_FALSE(EltCnt.isScalable());
 128 }
 129
 130 TEST(VectorTypesTest, Scalable) {
 131   LLVMContext Ctx;
 132
 133   Type *Int8Ty = Type::getInt8Ty(Ctx);
 134   Type *Int16Ty = Type::getInt16Ty(Ctx);
 135   Type *Int32Ty = Type::getInt32Ty(Ctx);
 136   Type *Int64Ty = Type::getInt64Ty(Ctx);
 137   Type *Float64Ty = Type::getDoubleTy(Ctx);
 138
 139   auto *ScV16Int8Ty = ScalableVectorType::get(Int8Ty, 16);
 140   ASSERT_NE(nullptr, ScV16Int8Ty);
 141   EXPECT_EQ(ScV16Int8Ty->getMinNumElements(), 16U);
 142   EXPECT_EQ(ScV16Int8Ty->getScalarSizeInBits(), 8U);
 143
 144   auto *ScV8Int32Ty =
 145       dyn_cast<ScalableVectorType>(VectorType::get(Int32Ty, 8, true));
 146   ASSERT_NE(nullptr, ScV8Int32Ty);
 147   EXPECT_EQ(ScV8Int32Ty->getMinNumElements(), 8U);
 148   EXPECT_EQ(ScV8Int32Ty->getElementType()->getScalarSizeInBits(), 32U);
 149
 150   auto *ScV8Int8Ty =
 151       dyn_cast<ScalableVectorType>(VectorType::get(Int8Ty, ScV8Int32Ty));
 152   EXPECT_VTY_NE(ScV8Int32Ty, ScV8Int8Ty);
 153   EXPECT_EQ(ScV8Int8Ty->getElementCount(), ScV8Int32Ty->getElementCount());
 154   EXPECT_EQ(ScV8Int8Ty->getElementType()->getScalarSizeInBits(), 8U);
 155
 156   auto *ScV8Int32Ty2 =
 157       dyn_cast<ScalableVectorType>(VectorType::get(Int32Ty, ScV8Int32Ty));
 158   EXPECT_VTY_EQ(ScV8Int32Ty, ScV8Int32Ty2);
 159
 160   auto *ScV8Int16Ty = dyn_cast<ScalableVectorType>(
 161       VectorType::get(Int16Ty, ElementCount::getScalable(8)));
 162   ASSERT_NE(nullptr, ScV8Int16Ty);
 163   EXPECT_EQ(ScV8Int16Ty->getMinNumElements(), 8U);
 164   EXPECT_EQ(ScV8Int16Ty->getElementType()->getScalarSizeInBits(), 16U);
 165
 166   auto EltCnt = ElementCount::getScalable(4);
 167   auto *ScV4Int64Ty =
 168       dyn_cast<ScalableVectorType>(VectorType::get(Int64Ty, EltCnt));
 169   ASSERT_NE(nullptr, ScV4Int64Ty);
 170   EXPECT_EQ(ScV4Int64Ty->getMinNumElements(), 4U);
 171   EXPECT_EQ(ScV4Int64Ty->getElementType()->getScalarSizeInBits(), 64U);
 172
 173   auto *ScV2Int64Ty = dyn_cast<ScalableVectorType>(
 174       VectorType::get(Int64Ty, EltCnt.divideCoefficientBy(2)));
 175   ASSERT_NE(nullptr, ScV2Int64Ty);
 176   EXPECT_EQ(ScV2Int64Ty->getMinNumElements(), 2U);
 177   EXPECT_EQ(ScV2Int64Ty->getElementType()->getScalarSizeInBits(), 64U);
 178
 179   auto *ScV8Int64Ty =
 180       dyn_cast<ScalableVectorType>(VectorType::get(Int64Ty, EltCnt * 2));
 181   ASSERT_NE(nullptr, ScV8Int64Ty);
 182   EXPECT_EQ(ScV8Int64Ty->getMinNumElements(), 8U);
 183   EXPECT_EQ(ScV8Int64Ty->getElementType()->getScalarSizeInBits(), 64U);
 184
 185   auto *ScV4Float64Ty =
 186       dyn_cast<ScalableVectorType>(VectorType::get(Float64Ty, EltCnt));
 187   ASSERT_NE(nullptr, ScV4Float64Ty);
 188   EXPECT_EQ(ScV4Float64Ty->getMinNumElements(), 4U);
 189   EXPECT_EQ(ScV4Float64Ty->getElementType()->getScalarSizeInBits(), 64U);
 190
 191   auto *ExtTy = dyn_cast<ScalableVectorType>(
 192       VectorType::getExtendedElementVectorType(ScV8Int16Ty));
 193   EXPECT_VTY_EQ(ExtTy, ScV8Int32Ty);
 194   EXPECT_EQ(ExtTy->getMinNumElements(), 8U);
 195   EXPECT_EQ(ExtTy->getElementType()->getScalarSizeInBits(), 32U);
 196
 197   auto *TruncTy = dyn_cast<ScalableVectorType>(
 198       VectorType::getTruncatedElementVectorType(ScV8Int32Ty));
 199   EXPECT_VTY_EQ(TruncTy, ScV8Int16Ty);
 200   EXPECT_EQ(TruncTy->getMinNumElements(), 8U);
 201   EXPECT_EQ(TruncTy->getElementType()->getScalarSizeInBits(), 16U);
 202
 203   auto *HalvedTy = dyn_cast<ScalableVectorType>(
 204       VectorType::getHalfElementsVectorType(ScV4Int64Ty));
 205   EXPECT_VTY_EQ(HalvedTy, ScV2Int64Ty);
 206   EXPECT_EQ(HalvedTy->getMinNumElements(), 2U);
 207   EXPECT_EQ(HalvedTy->getElementType()->getScalarSizeInBits(), 64U);
 208
 209   auto *DoubledTy = dyn_cast<ScalableVectorType>(
 210       VectorType::getDoubleElementsVectorType(ScV4Int64Ty));
 211   EXPECT_VTY_EQ(DoubledTy, ScV8Int64Ty);
 212   EXPECT_EQ(DoubledTy->getMinNumElements(), 8U);
 213   EXPECT_EQ(DoubledTy->getElementType()->getScalarSizeInBits(), 64U);
 214
 215   auto *ConvTy =
 216       dyn_cast<ScalableVectorType>(VectorType::getInteger(ScV4Float64Ty));
 217   EXPECT_VTY_EQ(ConvTy, ScV4Int64Ty);
 218   EXPECT_EQ(ConvTy->getMinNumElements(), 4U);
 219   EXPECT_EQ(ConvTy->getElementType()->getScalarSizeInBits(), 64U);
 220
 221   EltCnt = ScV8Int64Ty->getElementCount();
 222   EXPECT_EQ(EltCnt.getKnownMinValue(), 8U);
 223   ASSERT_TRUE(EltCnt.isScalable());
 224 }
 225
 226 TEST(VectorTypesTest, BaseVectorType) {
 227   LLVMContext Ctx;
 228
 229   Type *Int16Ty = Type::getInt16Ty(Ctx);
 230   Type *Int32Ty = Type::getInt32Ty(Ctx);
 231
 232   std::array<VectorType *, 8> VTys = {
 233       VectorType::get(Int16Ty, ElementCount::getScalable(4)),
 234       VectorType::get(Int16Ty, ElementCount::getFixed(4)),
 235       VectorType::get(Int16Ty, ElementCount::getScalable(2)),
 236       VectorType::get(Int16Ty, ElementCount::getFixed(2)),
 237       VectorType::get(Int32Ty, ElementCount::getScalable(4)),
 238       VectorType::get(Int32Ty, ElementCount::getFixed(4)),
 239       VectorType::get(Int32Ty, ElementCount::getScalable(2)),
 240       VectorType::get(Int32Ty, ElementCount::getFixed(2))};
 241
 242   /*
 243     The comparison matrix is symmetric, so we only check the upper triangle:
 244
 245     (0,0) (0,1) (0,2) ... (0,7)
 246     (1,0) (1,1) (1,2)         .
 247     (2,0) (2,1) (2,2)         .
 248     .                 .       .
 249     .                  .
 250     .                   .
 251     (7,0) ...             (7,7)
 252   */
 253   for (size_t I = 0, IEnd = VTys.size(); I < IEnd; ++I) {
 254     // test I == J
 255     VectorType *VI = VTys[I];
 256     ElementCount ECI = VI->getElementCount();
 257     EXPECT_EQ(isa<ScalableVectorType>(VI), ECI.isScalable());
 258
 259     for (size_t J = I + 1, JEnd = VTys.size(); J < JEnd; ++J) {
 260       // test I < J
 261       VectorType *VJ = VTys[J];
 262       EXPECT_VTY_NE(VI, VJ);
 263
 264       VectorType *VJPrime = VectorType::get(VI->getElementType(), VJ);
 265       if (VI->getElementType() == VJ->getElementType()) {
 266         EXPECT_VTY_EQ(VJ, VJPrime);
 267       } else {
 268         EXPECT_VTY_NE(VJ, VJPrime);
 269       }
 270
 271       EXPECT_EQ(VJ->getTypeID(), VJPrime->getTypeID())
 272           << "VJ and VJPrime are the same sort of vector";
 273     }
 274   }
 275 }
 276
 277 TEST(VectorTypesTest, FixedLenComparisons) {
 278   LLVMContext Ctx;
 279   DataLayout DL("");
 280
 281   Type *Int32Ty = Type::getInt32Ty(Ctx);
 282   Type *Int64Ty = Type::getInt64Ty(Ctx);
 283
 284   auto *V2Int32Ty = FixedVectorType::get(Int32Ty, 2);
 285   auto *V4Int32Ty = FixedVectorType::get(Int32Ty, 4);
 286
 287   auto *V2Int64Ty = FixedVectorType::get(Int64Ty, 2);
 288
 289   TypeSize V2I32Len = V2Int32Ty->getPrimitiveSizeInBits();
 290   EXPECT_EQ(V2I32Len.getKnownMinValue(), 64U);
 291   EXPECT_FALSE(V2I32Len.isScalable());
 292
 293   EXPECT_LT(V2Int32Ty->getPrimitiveSizeInBits().getFixedValue(),
 294             V4Int32Ty->getPrimitiveSizeInBits().getFixedValue());
 295   EXPECT_GT(V2Int64Ty->getPrimitiveSizeInBits().getFixedValue(),
 296             V2Int32Ty->getPrimitiveSizeInBits().getFixedValue());
 297   EXPECT_EQ(V4Int32Ty->getPrimitiveSizeInBits(),
 298             V2Int64Ty->getPrimitiveSizeInBits());
 299   EXPECT_NE(V2Int32Ty->getPrimitiveSizeInBits(),
 300             V2Int64Ty->getPrimitiveSizeInBits());
 301
 302   // Check that a fixed-only comparison works for fixed size vectors.
 303   EXPECT_EQ(V2Int64Ty->getPrimitiveSizeInBits().getFixedValue(),
 304             V4Int32Ty->getPrimitiveSizeInBits().getFixedValue());
 305
 306   // Check the DataLayout interfaces.
 307   EXPECT_EQ(DL.getTypeSizeInBits(V2Int64Ty), DL.getTypeSizeInBits(V4Int32Ty));
 308   EXPECT_EQ(DL.getTypeSizeInBits(V2Int32Ty), 64U);
 309   EXPECT_EQ(DL.getTypeSizeInBits(V2Int64Ty), 128U);
 310   EXPECT_EQ(DL.getTypeStoreSize(V2Int64Ty), DL.getTypeStoreSize(V4Int32Ty));
 311   EXPECT_NE(DL.getTypeStoreSizeInBits(V2Int32Ty),
 312             DL.getTypeStoreSizeInBits(V2Int64Ty));
 313   EXPECT_EQ(DL.getTypeStoreSizeInBits(V2Int32Ty), 64U);
 314   EXPECT_EQ(DL.getTypeStoreSize(V2Int64Ty), 16U);
 315   EXPECT_EQ(DL.getTypeAllocSize(V4Int32Ty), DL.getTypeAllocSize(V2Int64Ty));
 316   EXPECT_NE(DL.getTypeAllocSizeInBits(V2Int32Ty),
 317             DL.getTypeAllocSizeInBits(V2Int64Ty));
 318   EXPECT_EQ(DL.getTypeAllocSizeInBits(V4Int32Ty), 128U);
 319   EXPECT_EQ(DL.getTypeAllocSize(V2Int32Ty), 8U);
 320   ASSERT_TRUE(DL.typeSizeEqualsStoreSize(V4Int32Ty));
 321 }
 322
 323 TEST(VectorTypesTest, ScalableComparisons) {
 324   LLVMContext Ctx;
 325   DataLayout DL("");
 326
 327   Type *Int32Ty = Type::getInt32Ty(Ctx);
 328   Type *Int64Ty = Type::getInt64Ty(Ctx);
 329
 330   auto *ScV2Int32Ty = ScalableVectorType::get(Int32Ty, 2);
 331   auto *ScV4Int32Ty = ScalableVectorType::get(Int32Ty, 4);
 332
 333   auto *ScV2Int64Ty = ScalableVectorType::get(Int64Ty, 2);
 334
 335   TypeSize ScV2I32Len = ScV2Int32Ty->getPrimitiveSizeInBits();
 336   EXPECT_EQ(ScV2I32Len.getKnownMinValue(), 64U);
 337   EXPECT_TRUE(ScV2I32Len.isScalable());
 338
 339   EXPECT_LT(ScV2Int32Ty->getPrimitiveSizeInBits().getKnownMinValue(),
 340             ScV4Int32Ty->getPrimitiveSizeInBits().getKnownMinValue());
 341   EXPECT_GT(ScV2Int64Ty->getPrimitiveSizeInBits().getKnownMinValue(),
 342             ScV2Int32Ty->getPrimitiveSizeInBits().getKnownMinValue());
 343   EXPECT_EQ(ScV4Int32Ty->getPrimitiveSizeInBits().getKnownMinValue(),
 344             ScV2Int64Ty->getPrimitiveSizeInBits().getKnownMinValue());
 345   EXPECT_NE(ScV2Int32Ty->getPrimitiveSizeInBits().getKnownMinValue(),
 346             ScV2Int64Ty->getPrimitiveSizeInBits().getKnownMinValue());
 347
 348   // Check the DataLayout interfaces.
 349   EXPECT_EQ(DL.getTypeSizeInBits(ScV2Int64Ty),
 350             DL.getTypeSizeInBits(ScV4Int32Ty));
 351   EXPECT_EQ(DL.getTypeSizeInBits(ScV2Int32Ty).getKnownMinValue(), 64U);
 352   EXPECT_EQ(DL.getTypeStoreSize(ScV2Int64Ty), DL.getTypeStoreSize(ScV4Int32Ty));
 353   EXPECT_NE(DL.getTypeStoreSizeInBits(ScV2Int32Ty),
 354             DL.getTypeStoreSizeInBits(ScV2Int64Ty));
 355   EXPECT_EQ(DL.getTypeStoreSizeInBits(ScV2Int32Ty).getKnownMinValue(), 64U);
 356   EXPECT_EQ(DL.getTypeStoreSize(ScV2Int64Ty).getKnownMinValue(), 16U);
 357   EXPECT_EQ(DL.getTypeAllocSize(ScV4Int32Ty), DL.getTypeAllocSize(ScV2Int64Ty));
 358   EXPECT_NE(DL.getTypeAllocSizeInBits(ScV2Int32Ty),
 359             DL.getTypeAllocSizeInBits(ScV2Int64Ty));
 360   EXPECT_EQ(DL.getTypeAllocSizeInBits(ScV4Int32Ty).getKnownMinValue(), 128U);
 361   EXPECT_EQ(DL.getTypeAllocSize(ScV2Int32Ty).getKnownMinValue(), 8U);
 362   ASSERT_TRUE(DL.typeSizeEqualsStoreSize(ScV4Int32Ty));
 363 }
 364
 365 TEST(VectorTypesTest, CrossComparisons) {
 366   LLVMContext Ctx;
 367
 368   Type *Int32Ty = Type::getInt32Ty(Ctx);
 369
 370   auto *V4Int32Ty = FixedVectorType::get(Int32Ty, 4);
 371   auto *ScV4Int32Ty = ScalableVectorType::get(Int32Ty, 4);
 372
 373   // Even though the minimum size is the same, a scalable vector could be
 374   // larger so we don't consider them to be the same size.
 375   EXPECT_NE(V4Int32Ty->getPrimitiveSizeInBits(),
 376             ScV4Int32Ty->getPrimitiveSizeInBits());
 377   // If we are only checking the minimum, then they are the same size.
 378   EXPECT_EQ(V4Int32Ty->getPrimitiveSizeInBits().getKnownMinValue(),
 379             ScV4Int32Ty->getPrimitiveSizeInBits().getKnownMinValue());
 380
 381   // We can't use ordering comparisons (<,<=,>,>=) between scalable and
 382   // non-scalable vector sizes.
 383 }
 384
 385 } // end anonymous namespace