Adding a repro.ilproj and update instructions to enable writing repro in IL

3 files changed, 82 insertions, 0 deletions

diff --git a/Documentation/how-to-build-and-run-ilcompiler-in-visual-studio.md b/Documentation/how-to-build-and-run-ilcompiler-in-visual-studio.md
index e5d430f5b..908fe2c84 100644
--- a/Documentation/how-to-build-and-run-ilcompiler-in-visual-studio.md
+++ b/Documentation/how-to-build-and-run-ilcompiler-in-visual-studio.md
@@ -63,3 +63,7 @@ _Note: The size of NuGet packages is approximately 2.75 GB, so download might ta
 
   - Set breakpoint at repro::Program::Main in main.cpp
   - Build, run & step through as with any other C++ program
+
+## Writing your repro code in IL ##
+
+If you want to write your repro code using IL (instead of C#), you can search/replace `"repro\repro.csproj"` to `"repro\repro.ilproj"` in ILCompiler.sln which switches to repro.ilproj instead of repro.csproj. Just write your IL code in `repro.il` and build/debug as usual. All the instructions above still would work as expected. Just make sure don't check-in that change.
diff --git a/src/ILCompiler/repro/repro.il b/src/ILCompiler/repro/repro.il
new file mode 100644
index 000000000..94f9aac84
--- /dev/null
+++ b/src/ILCompiler/repro/repro.il
@@ -0,0 +1,50 @@
+// 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.  
+
+.assembly extern System.Runtime 
+{
+  .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )                         // .z\V.4..
+  .ver 4:0:0:0
+}
+.assembly extern System.Console
+{
+  .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )                         // .z\V.4..
+  .ver 4:0:0:0
+}
+
+.assembly repro
+{
+  .hash algorithm 0x00008004
+  .ver 0:0:0:0
+}
+
+.module repro.exe
+.imagebase 0x00400000
+.file alignment 0x00000200
+.stackreserve 0x00100000
+.subsystem 0x0003       // WINDOWS_CUI
+.corflags 0x00000001    //  ILONLY
+
+.class private auto ansi beforefieldinit Program
+       extends [System.Runtime]System.Object
+{
+  .method private hidebysig static void  Main(string[] args) cil managed
+  {
+    .entrypoint
+    .maxstack   8
+    
+    ldstr   "Hello world from MSIL!"
+    call    void [System.Console]System.Console::WriteLine(string)
+    ret
+  }
+
+  .method public hidebysig specialname rtspecialname 
+          instance void  .ctor() cil managed
+  {
+    .maxstack   8
+    ldarg.0
+    call    instance void [System.Runtime]System.Object::.ctor()
+    ret
+  }
+}
diff --git a/src/ILCompiler/repro/repro.ilproj b/src/ILCompiler/repro/repro.ilproj
new file mode 100644
index 000000000..f60af9310
--- /dev/null
+++ b/src/ILCompiler/repro/repro.ilproj
@@ -0,0 +1,28 @@
+<?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>
+    <ProjectGuid>{FBA029C3-B184-4457-AEEC-38D0C2523067}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AssemblyName>repro</AssemblyName>
+    <NuGetTargetMoniker>.NETStandard,Version=v1.6</NuGetTargetMoniker>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <OutputPath>bin\Debug</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <OutputPath>bin\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="repro.il" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="project.json" />
+  </ItemGroup>
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
+  <Import Project="$(MSBuildThisFileDirectory)\..\..\BuildIntegration\Microsoft.NETCore.Native.targets" />
+</Project>