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1 //===-------- llvm/unittest/CodeGen/ScalableVectorMVTsTest.cpp ------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "llvm/CodeGen/ValueTypes.h"
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10 #include "llvm/IR/DerivedTypes.h"
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11 #include "llvm/IR/LLVMContext.h"
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12 #include "llvm/Support/MachineValueType.h"
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13 #include "llvm/Support/TypeSize.h"
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14 #include "gtest/gtest.h"
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15
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16 using namespace llvm;
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17
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18 namespace {
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19
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20 TEST(ScalableVectorMVTsTest, IntegerMVTs) {
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21 for (auto VecTy : MVT::integer_scalable_vector_valuetypes()) {
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22 ASSERT_TRUE(VecTy.isValid());
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23 ASSERT_TRUE(VecTy.isInteger());
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24 ASSERT_TRUE(VecTy.isVector());
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25 ASSERT_TRUE(VecTy.isScalableVector());
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26 ASSERT_TRUE(VecTy.getScalarType().isValid());
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27
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28 ASSERT_FALSE(VecTy.isFloatingPoint());
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29 }
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30 }
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31
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32 TEST(ScalableVectorMVTsTest, FloatMVTs) {
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33 for (auto VecTy : MVT::fp_scalable_vector_valuetypes()) {
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34 ASSERT_TRUE(VecTy.isValid());
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35 ASSERT_TRUE(VecTy.isFloatingPoint());
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36 ASSERT_TRUE(VecTy.isVector());
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37 ASSERT_TRUE(VecTy.isScalableVector());
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38 ASSERT_TRUE(VecTy.getScalarType().isValid());
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39
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40 ASSERT_FALSE(VecTy.isInteger());
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41 }
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42 }
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43
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44 TEST(ScalableVectorMVTsTest, HelperFuncs) {
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45 LLVMContext Ctx;
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46
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47 // Create with scalable flag
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48 EVT Vnx4i32 = EVT::getVectorVT(Ctx, MVT::i32, 4, /*Scalable=*/true);
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49 ASSERT_TRUE(Vnx4i32.isScalableVector());
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50
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51 // Create with separate llvm::ElementCount
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52 auto EltCnt = ElementCount(2, true);
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53 EVT Vnx2i32 = EVT::getVectorVT(Ctx, MVT::i32, EltCnt);
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54 ASSERT_TRUE(Vnx2i32.isScalableVector());
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55
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56 // Create with inline llvm::ElementCount
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57 EVT Vnx2i64 = EVT::getVectorVT(Ctx, MVT::i64, {2, true});
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58 ASSERT_TRUE(Vnx2i64.isScalableVector());
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59
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60 // Check that changing scalar types/element count works
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61 EXPECT_EQ(Vnx2i32.widenIntegerVectorElementType(Ctx), Vnx2i64);
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62 EXPECT_EQ(Vnx4i32.getHalfNumVectorElementsVT(Ctx), Vnx2i32);
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63
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64 // Check that overloaded '*' and '/' operators work
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65 EXPECT_EQ(EVT::getVectorVT(Ctx, MVT::i64, EltCnt * 2), MVT::nxv4i64);
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66 EXPECT_EQ(EVT::getVectorVT(Ctx, MVT::i64, EltCnt / 2), MVT::nxv1i64);
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67
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68 // Check that float->int conversion works
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69 EVT Vnx2f64 = EVT::getVectorVT(Ctx, MVT::f64, {2, true});
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70 EXPECT_EQ(Vnx2f64.changeTypeToInteger(), Vnx2i64);
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71
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72 // Check fields inside llvm::ElementCount
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73 EltCnt = Vnx4i32.getVectorElementCount();
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74 EXPECT_EQ(EltCnt.Min, 4U);
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75 ASSERT_TRUE(EltCnt.Scalable);
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76
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77 // Check that fixed-length vector types aren't scalable.
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78 EVT V8i32 = EVT::getVectorVT(Ctx, MVT::i32, 8);
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79 ASSERT_FALSE(V8i32.isScalableVector());
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80 EVT V4f64 = EVT::getVectorVT(Ctx, MVT::f64, {4, false});
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81 ASSERT_FALSE(V4f64.isScalableVector());
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82
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83 // Check that llvm::ElementCount works for fixed-length types.
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84 EltCnt = V8i32.getVectorElementCount();
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85 EXPECT_EQ(EltCnt.Min, 8U);
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86 ASSERT_FALSE(EltCnt.Scalable);
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87 }
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88
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89 TEST(ScalableVectorMVTsTest, IRToVTTranslation) {
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90 LLVMContext Ctx;
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91
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92 Type *Int64Ty = Type::getInt64Ty(Ctx);
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93 VectorType *ScV8Int64Ty = VectorType::get(Int64Ty, {8, true});
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94
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95 // Check that we can map a scalable IR type to an MVT
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96 MVT Mnxv8i64 = MVT::getVT(ScV8Int64Ty);
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97 ASSERT_TRUE(Mnxv8i64.isScalableVector());
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98 ASSERT_EQ(ScV8Int64Ty->getElementCount(), Mnxv8i64.getVectorElementCount());
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99 ASSERT_EQ(MVT::getVT(ScV8Int64Ty->getElementType()),
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100 Mnxv8i64.getScalarType());
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101
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102 // Check that we can map a scalable IR type to an EVT
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103 EVT Enxv8i64 = EVT::getEVT(ScV8Int64Ty);
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104 ASSERT_TRUE(Enxv8i64.isScalableVector());
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105 ASSERT_EQ(ScV8Int64Ty->getElementCount(), Enxv8i64.getVectorElementCount());
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106 ASSERT_EQ(EVT::getEVT(ScV8Int64Ty->getElementType()),
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107 Enxv8i64.getScalarType());
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108 }
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109
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110 TEST(ScalableVectorMVTsTest, VTToIRTranslation) {
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111 LLVMContext Ctx;
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112
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113 EVT Enxv4f64 = EVT::getVectorVT(Ctx, MVT::f64, {4, true});
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114
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115 Type *Ty = Enxv4f64.getTypeForEVT(Ctx);
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116 VectorType *ScV4Float64Ty = cast<VectorType>(Ty);
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117 ASSERT_TRUE(ScV4Float64Ty->isScalable());
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118 ASSERT_EQ(Enxv4f64.getVectorElementCount(), ScV4Float64Ty->getElementCount());
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119 ASSERT_EQ(Enxv4f64.getScalarType().getTypeForEVT(Ctx),
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120 ScV4Float64Ty->getElementType());
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121 }
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122
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123 TEST(ScalableVectorMVTsTest, SizeQueries) {
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124 LLVMContext Ctx;
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125
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126 EVT nxv4i32 = EVT::getVectorVT(Ctx, MVT::i32, 4, /*Scalable=*/ true);
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127 EVT nxv2i32 = EVT::getVectorVT(Ctx, MVT::i32, 2, /*Scalable=*/ true);
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128 EVT nxv2i64 = EVT::getVectorVT(Ctx, MVT::i64, 2, /*Scalable=*/ true);
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129 EVT nxv2f64 = EVT::getVectorVT(Ctx, MVT::f64, 2, /*Scalable=*/ true);
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130
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131 EVT v4i32 = EVT::getVectorVT(Ctx, MVT::i32, 4);
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132 EVT v2i32 = EVT::getVectorVT(Ctx, MVT::i32, 2);
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133 EVT v2i64 = EVT::getVectorVT(Ctx, MVT::i64, 2);
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134 EVT v2f64 = EVT::getVectorVT(Ctx, MVT::f64, 2);
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135
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136 // Check equivalence and ordering on scalable types.
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137 EXPECT_EQ(nxv4i32.getSizeInBits(), nxv2i64.getSizeInBits());
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138 EXPECT_EQ(nxv2f64.getSizeInBits(), nxv2i64.getSizeInBits());
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139 EXPECT_NE(nxv2i32.getSizeInBits(), nxv4i32.getSizeInBits());
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140 EXPECT_LT(nxv2i32.getSizeInBits(), nxv2i64.getSizeInBits());
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141 EXPECT_LE(nxv4i32.getSizeInBits(), nxv2i64.getSizeInBits());
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142 EXPECT_GT(nxv4i32.getSizeInBits(), nxv2i32.getSizeInBits());
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143 EXPECT_GE(nxv2i64.getSizeInBits(), nxv4i32.getSizeInBits());
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144
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145 // Check equivalence and ordering on fixed types.
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146 EXPECT_EQ(v4i32.getSizeInBits(), v2i64.getSizeInBits());
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147 EXPECT_EQ(v2f64.getSizeInBits(), v2i64.getSizeInBits());
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148 EXPECT_NE(v2i32.getSizeInBits(), v4i32.getSizeInBits());
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149 EXPECT_LT(v2i32.getSizeInBits(), v2i64.getSizeInBits());
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150 EXPECT_LE(v4i32.getSizeInBits(), v2i64.getSizeInBits());
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151 EXPECT_GT(v4i32.getSizeInBits(), v2i32.getSizeInBits());
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152 EXPECT_GE(v2i64.getSizeInBits(), v4i32.getSizeInBits());
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153
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154 // Check that scalable and non-scalable types with the same minimum size
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155 // are not considered equal.
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156 ASSERT_TRUE(v4i32.getSizeInBits() != nxv4i32.getSizeInBits());
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157 ASSERT_FALSE(v2i64.getSizeInBits() == nxv2f64.getSizeInBits());
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158
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159 // Check that we can obtain a known-exact size from a non-scalable type.
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160 EXPECT_EQ(v4i32.getSizeInBits(), 128U);
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161 EXPECT_EQ(v2i64.getSizeInBits().getFixedSize(), 128U);
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162
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163 // Check that we can query the known minimum size for both scalable and
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164 // fixed length types.
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165 EXPECT_EQ(nxv2i32.getSizeInBits().getKnownMinSize(), 64U);
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166 EXPECT_EQ(nxv2f64.getSizeInBits().getKnownMinSize(), 128U);
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167 EXPECT_EQ(v2i32.getSizeInBits().getKnownMinSize(),
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168 nxv2i32.getSizeInBits().getKnownMinSize());
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169
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170 // Check scalable property.
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171 ASSERT_FALSE(v4i32.getSizeInBits().isScalable());
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172 ASSERT_TRUE(nxv4i32.getSizeInBits().isScalable());
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173
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174 // Check convenience size scaling methods.
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175 EXPECT_EQ(v2i32.getSizeInBits() * 2, v4i32.getSizeInBits());
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176 EXPECT_EQ(2 * nxv2i32.getSizeInBits(), nxv4i32.getSizeInBits());
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177 EXPECT_EQ(nxv2f64.getSizeInBits() / 2, nxv2i32.getSizeInBits());
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178 }
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179
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180 } // end anonymous namespace
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