This repository has been archived by the owner on Jan 23, 2023. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 2.7k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #10867 from AndyAyersMS/FixSingleDefBug
Jit: fix issue with single-def type propagation
- Loading branch information
Showing
3 changed files
with
88 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,46 @@ | ||
// Licensed to the .NET Foundation under one or more agreements. | ||
// The .NET Foundation licenses this file to you under the MIT license. | ||
// See the LICENSE file in the project root for more information. | ||
|
||
using System; | ||
|
||
class B | ||
{ | ||
public virtual string F() { return "B"; } | ||
} | ||
|
||
sealed class D : B | ||
{ | ||
public override string F() { return "D"; } | ||
} | ||
|
||
sealed class E : B | ||
{ | ||
public override string F() { return "E"; } | ||
} | ||
|
||
class X | ||
{ | ||
public static int Main(string[] args) | ||
{ | ||
// When optimizing IL, CSC will leave the newobj's on the stack | ||
// across the branches to the common def point. | ||
B b1 = (args.Length > 0) ? (B)new E() : (B)new D(); | ||
B b2 = null; | ||
|
||
// Conditional flow here to forces b1 to a local instead of | ||
// remaining on the stack. So we have a single def point with | ||
// two reaching values. | ||
if (args.Length > 0) | ||
{ | ||
b2 = new D(); | ||
} | ||
else | ||
{ | ||
b2 = new E(); | ||
} | ||
|
||
// We should not be able to devirtualize either call. | ||
return b2.F()[0] + b1.F()[0] - 37; | ||
} | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,37 @@ | ||
<?xml version="1.0" encoding="utf-8"?> | ||
<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> | ||
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" /> | ||
<PropertyGroup> | ||
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> | ||
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> | ||
<AssemblyName>$(MSBuildProjectName)</AssemblyName> | ||
<SchemaVersion>2.0</SchemaVersion> | ||
<ProjectGuid>{95DFC527-4DC1-495E-97D7-E94EE1F7140D}</ProjectGuid> | ||
<OutputType>Exe</OutputType> | ||
<ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids> | ||
<SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\..\</SolutionDir> | ||
</PropertyGroup> | ||
<!-- Default configurations to help VS understand the configurations --> | ||
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> | ||
</PropertyGroup> | ||
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> | ||
</PropertyGroup> | ||
<ItemGroup> | ||
<CodeAnalysisDependentAssemblyPaths Condition=" '$(VS100COMNTOOLS)' != '' " Include="$(VS100COMNTOOLS)..\IDE\PrivateAssemblies"> | ||
<Visible>False</Visible> | ||
</CodeAnalysisDependentAssemblyPaths> | ||
</ItemGroup> | ||
<PropertyGroup> | ||
<DebugType>None</DebugType> | ||
<Optimize>True</Optimize> | ||
</PropertyGroup> | ||
<ItemGroup> | ||
<Compile Include="GitHub_10858.cs" /> | ||
</ItemGroup> | ||
<ItemGroup> | ||
<Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" /> | ||
</ItemGroup> | ||
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" /> | ||
<PropertyGroup Condition=" '$(MsBuildProjectDirOverride)' != '' "> | ||
</PropertyGroup> | ||
</Project> |