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[release/9.0-rc1] JIT: update simd base type when combining simd nodes for bitwise ops #106520

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Aug 16, 2024
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[release/9.0-rc1] JIT: update simd base type when combining simd nodes for bitwise ops #106520

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11 changes: 7 additions & 4 deletions src/coreclr/jit/lowerxarch.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1430,10 +1430,9 @@ GenTree* Lowering::LowerHWIntrinsic(GenTreeHWIntrinsic* node)
const uint8_t B = 0xCC;
const uint8_t C = 0xAA;

var_types simdType = node->TypeGet();
CorInfoType simdBaseJitType = node->GetSimdBaseJitType();
var_types simdBaseType = node->GetSimdBaseType();
unsigned simdSize = node->GetSimdSize();
var_types simdType = node->TypeGet();
var_types simdBaseType = node->GetSimdBaseType();
unsigned simdSize = node->GetSimdSize();

GenTree* op1 = node->Op(1);
GenTree* op2 = node->Op(2);
Expand All @@ -1455,6 +1454,10 @@ GenTree* Lowering::LowerHWIntrinsic(GenTreeHWIntrinsic* node)
bool userIsScalar = false;
genTreeOps userOper = userIntrin->GetOperForHWIntrinsicId(&isScalar);

// userIntrin may have re-interpreted the base type
//
simdBaseType = userIntrin->GetSimdBaseType();

if (GenTreeHWIntrinsic::OperIsBitwiseHWIntrinsic(userOper))
{
if (isOperNot && (userOper == GT_AND))
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28 changes: 28 additions & 0 deletions src/tests/JIT/Regression/JitBlue/Runtime_106478/Runtime_106478.cs
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@@ -0,0 +1,28 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

// Found by Antigen
// Reduced from 30.05 KB to 2.35 KB.
// Further redued by hand

using System;
using System.Runtime.Intrinsics;
using Xunit;

public class Runtime_106478
{
static Vector512<double> s_v512_double_46 = Vector512.Create(4, -4.971830985915493, -0.9789473684210527, -1.956043956043956, 2, 74.25, 1.0533333333333332, 4.033898305084746);
Vector512<int> v512_int_101 = Vector512<int>.Zero;
Vector512<int> p_v512_int_125 = Vector512<int>.Zero;

void Problem()
{
p_v512_int_125 = v512_int_101& Vector512.AsInt32(s_v512_double_46 ^ Vector512<double>.AllBitsSet);
}

[Fact]
public static void Test()
{
new Runtime_106478().Problem();
}
}
8 changes: 8 additions & 0 deletions src/tests/JIT/Regression/JitBlue/Runtime_106478/Runtime_106478.csproj
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@@ -0,0 +1,8 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<Optimize>True</Optimize>
</PropertyGroup>
<ItemGroup>
<Compile Include="$(MSBuildProjectName).cs" />
</ItemGroup>
</Project>
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