[r2r] Add helpers for class init - #124649

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BrzVlad merged 3 commits into
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BrzVlad:fix-r2r-class-init
Feb 24, 2026
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[r2r] Add helpers for class init#124649
BrzVlad merged 3 commits into
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BrzVlad:fix-r2r-class-init

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Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.

public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();

@BrzVlad
[r2r] Add helpers for class init
8808ed5
Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
CopilotAI review requested due to automatic review settings February 20, 2026 14:45
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Pull request overview

This PR adds ReadyToRun (R2R) helper support for class initialization to prevent expensive interpretation on platforms without runtime JIT support (iOS, tvOS, WASM). Previously, methods requiring class initialization checks would be entirely skipped during R2R compilation and interpreted at runtime. With these changes, the class initialization helpers are compiled ahead-of-time on non-JIT platforms while still allowing JIT optimization on platforms that support runtime code generation.

Changes:

  • Added two new R2R helper enum values (0x116 and 0x117) for InitClass and InitInstClass across C# and C++ codebases
  • Implemented conditional logic to use R2R helpers on iOS/WASM while allowing runtime JIT on other platforms
  • Added signature parsing support for the new helper types

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file
FileDescription
src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.csAdded InitClass (0x116) and InitInstClass (0x117) enum values to ReadyToRunHelper
src/coreclr/inc/readytorun.hAdded corresponding C++ enum values READYTORUN_HELPER_InitClass and READYTORUN_HELPER_InitInstClass
src/coreclr/inc/readytorunhelpers.hMapped new R2R helpers to existing CORINFO_HELP_INITCLASS and CORINFO_HELP_INITINSTCLASS JIT helpers
src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/ReadyToRunSignature.csAdded signature parsing cases for INIT_CLASS and INIT_INST_CLASS
src/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.csImplemented conditional helper resolution based on TargetAllowsRuntimeCodeGeneration flag

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Comment threadsrc/coreclr/inc/readytorun.h
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Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.

@BrzVladBrzVlad mentioned this pull request Feb 24, 2026
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This was referenced Feb 24, 2026
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BrzVlad merged commit 27689b6 into dotnet:mainFeb 24, 2026
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@dotnet-maestrodotnet-maestroBot mentioned this pull request Feb 25, 2026
Merged
iremyux pushed a commit to iremyux/dotnet-runtime that referenced this pull request Mar 2, 2026
@BrzVlad@iremyux
[r2r] Add helpers for class init (dotnet#124649)
b8d69fe
Code needing to check for class init would be skipped for R2R
compilation, probably because at runtime we would be likely to detect
the check as redundant. On iOS this means that the entire method would
be interpreted which is way more expensive than a small check for class
initialization. This commit adds a r2r helper for this, which will end
up as a call to the standard jit helper:
System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass.
In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
@github-actionsgithub-actionsBot locked and limited conversation to collaborators Mar 27, 2026
Sign up for freeto subscribe to this conversation on GitHub. Already have an account? Sign in.

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
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}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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[r2r] Add helpers for class init - #124649
Merged
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
Feb 24, 2026
Merged
[r2r] Add helpers for class init#124649
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
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Feb 20, 2026

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Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();

@BrzVlad
[r2r] Add helpers for class init
8808ed5
Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
CopilotAI
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Pull request overview
This PR adds ReadyToRun (R2R) helper support for class initialization to prevent expensive interpretation on platforms without runtime JIT support (iOS, tvOS, WASM). Previously, methods requiring class initialization checks would be entirely skipped during R2R compilation and interpreted at runtime. With these changes, the class initialization helpers are compiled ahead-of-time on non-JIT platforms while still allowing JIT optimization on platforms that support runtime code generation.
Changes:
  • Added two new R2R helper enum values (0x116 and 0x117) for InitClass and InitInstClass across C# and C++ codebases
  • Implemented conditional logic to use R2R helpers on iOS/WASM while allowing runtime JIT on other platforms
  • Added signature parsing support for the new helper types
Reviewed changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.
Show a summary per file
FileDescription
src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.csAdded InitClass (0x116) and InitInstClass (0x117) enum values to ReadyToRunHelper
src/coreclr/inc/readytorun.hAdded corresponding C++ enum values READYTORUN_HELPER_InitClass and READYTORUN_HELPER_InitInstClass
src/coreclr/inc/readytorunhelpers.hMapped new R2R helpers to existing CORINFO_HELP_INITCLASS and CORINFO_HELP_INITINSTCLASS JIT helpers
src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/ReadyToRunSignature.csAdded signature parsing cases for INIT_CLASS and INIT_INST_CLASS
src/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.csImplemented conditional helper resolution based on TargetAllowsRuntimeCodeGeneration flag
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Comment threadsrc/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.cs
Outdated

Comment threadsrc/coreclr/inc/readytorun.h
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Feb 24, 2026

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Comment threadsrc/coreclr/inc/readytorun.h
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reviewed
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Comment threadsrc/coreclr/inc/readytorun.h
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review requested due to automatic review settings
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Pull request overview
Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.
@BrzVladBrzVlad
mentioned this pull request
Feb 24, 2026

Closed

11 tasks

This was referenced Feb 24, 2026

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@BrzVlad
BrzVlad
merged commit 27689b6
into
dotnet:mainFeb 24, 2026

106 of 109 checks passed

@dotnet-maestrodotnet-maestroBot
mentioned this pull request
Feb 25, 2026
 Merged

iremyux pushed a commit
to iremyux/dotnet-runtime
that referenced
this pull request
Mar 2, 2026
@BrzVlad@iremyux
[r2r] Add helpers for class init (dotnet#124649)
b8d69fe
Code needing to check for class init would be skipped for R2R
compilation, probably because at runtime we would be likely to detect
the check as redundant. On iOS this means that the entire method would
be interpreted which is way more expensive than a small check for class
initialization. This commit adds a r2r helper for this, which will end
up as a call to the standard jit helper:
System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass.
In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[r2r] Add helpers for class init - #124649
Merged
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
Feb 24, 2026
Merged
[r2r] Add helpers for class init#124649
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
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@BrzVlad
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Feb 20, 2026

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Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();

@BrzVlad
[r2r] Add helpers for class init
8808ed5
Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
CopilotAI
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Pull request overview
This PR adds ReadyToRun (R2R) helper support for class initialization to prevent expensive interpretation on platforms without runtime JIT support (iOS, tvOS, WASM). Previously, methods requiring class initialization checks would be entirely skipped during R2R compilation and interpreted at runtime. With these changes, the class initialization helpers are compiled ahead-of-time on non-JIT platforms while still allowing JIT optimization on platforms that support runtime code generation.
Changes:
  • Added two new R2R helper enum values (0x116 and 0x117) for InitClass and InitInstClass across C# and C++ codebases
  • Implemented conditional logic to use R2R helpers on iOS/WASM while allowing runtime JIT on other platforms
  • Added signature parsing support for the new helper types
Reviewed changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.
Show a summary per file
FileDescription
src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.csAdded InitClass (0x116) and InitInstClass (0x117) enum values to ReadyToRunHelper
src/coreclr/inc/readytorun.hAdded corresponding C++ enum values READYTORUN_HELPER_InitClass and READYTORUN_HELPER_InitInstClass
src/coreclr/inc/readytorunhelpers.hMapped new R2R helpers to existing CORINFO_HELP_INITCLASS and CORINFO_HELP_INITINSTCLASS JIT helpers
src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/ReadyToRunSignature.csAdded signature parsing cases for INIT_CLASS and INIT_INST_CLASS
src/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.csImplemented conditional helper resolution based on TargetAllowsRuntimeCodeGeneration flag
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Comment threadsrc/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.cs
Outdated

Comment threadsrc/coreclr/inc/readytorun.h
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Comment threadsrc/coreclr/inc/readytorun.h
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Pull request overview
Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.
@BrzVladBrzVlad
mentioned this pull request
Feb 24, 2026

Closed

11 tasks

This was referenced Feb 24, 2026

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BrzVlad
merged commit 27689b6
into
dotnet:mainFeb 24, 2026

106 of 109 checks passed

@dotnet-maestrodotnet-maestroBot
mentioned this pull request
Feb 25, 2026
 Merged

iremyux pushed a commit
to iremyux/dotnet-runtime
that referenced
this pull request
Mar 2, 2026
@BrzVlad@iremyux
[r2r] Add helpers for class init (dotnet#124649)
b8d69fe
Code needing to check for class init would be skipped for R2R
compilation, probably because at runtime we would be likely to detect
the check as redundant. On iOS this means that the entire method would
be interpreted which is way more expensive than a small check for class
initialization. This commit adds a r2r helper for this, which will end
up as a call to the standard jit helper:
System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass.
In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[r2r] Add helpers for class init - #124649
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BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
Feb 24, 2026
Merged
[r2r] Add helpers for class init#124649
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
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Feb 20, 2026

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Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();

@BrzVlad
[r2r] Add helpers for class init
8808ed5
Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
CopilotAI
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Pull request overview
This PR adds ReadyToRun (R2R) helper support for class initialization to prevent expensive interpretation on platforms without runtime JIT support (iOS, tvOS, WASM). Previously, methods requiring class initialization checks would be entirely skipped during R2R compilation and interpreted at runtime. With these changes, the class initialization helpers are compiled ahead-of-time on non-JIT platforms while still allowing JIT optimization on platforms that support runtime code generation.
Changes:
  • Added two new R2R helper enum values (0x116 and 0x117) for InitClass and InitInstClass across C# and C++ codebases
  • Implemented conditional logic to use R2R helpers on iOS/WASM while allowing runtime JIT on other platforms
  • Added signature parsing support for the new helper types
Reviewed changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.
Show a summary per file
FileDescription
src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.csAdded InitClass (0x116) and InitInstClass (0x117) enum values to ReadyToRunHelper
src/coreclr/inc/readytorun.hAdded corresponding C++ enum values READYTORUN_HELPER_InitClass and READYTORUN_HELPER_InitInstClass
src/coreclr/inc/readytorunhelpers.hMapped new R2R helpers to existing CORINFO_HELP_INITCLASS and CORINFO_HELP_INITINSTCLASS JIT helpers
src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/ReadyToRunSignature.csAdded signature parsing cases for INIT_CLASS and INIT_INST_CLASS
src/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.csImplemented conditional helper resolution based on TargetAllowsRuntimeCodeGeneration flag
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Comment threadsrc/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.cs
Outdated

Comment threadsrc/coreclr/inc/readytorun.h
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Comment threadsrc/coreclr/inc/readytorun.h
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Pull request overview
Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.
@BrzVladBrzVlad
mentioned this pull request
Feb 24, 2026

Closed

11 tasks

This was referenced Feb 24, 2026

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@BrzVlad
BrzVlad
merged commit 27689b6
into
dotnet:mainFeb 24, 2026

106 of 109 checks passed

@dotnet-maestrodotnet-maestroBot
mentioned this pull request
Feb 25, 2026
 Merged

iremyux pushed a commit
to iremyux/dotnet-runtime
that referenced
this pull request
Mar 2, 2026
@BrzVlad@iremyux
[r2r] Add helpers for class init (dotnet#124649)
b8d69fe
Code needing to check for class init would be skipped for R2R
compilation, probably because at runtime we would be likely to detect
the check as redundant. On iOS this means that the entire method would
be interpreted which is way more expensive than a small check for class
initialization. This commit adds a r2r helper for this, which will end
up as a call to the standard jit helper:
System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass.
In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
[r2r] Add helpers for class init - #124649
Merged
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
Feb 24, 2026
Merged
[r2r] Add helpers for class init#124649
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
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@BrzVlad
@BrzVladBrzVlad
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Feb 20, 2026

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Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();

@BrzVlad
[r2r] Add helpers for class init
8808ed5
Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
CopilotAI
review requested due to automatic review settings
February 20, 2026 14:45
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Pull request overview
This PR adds ReadyToRun (R2R) helper support for class initialization to prevent expensive interpretation on platforms without runtime JIT support (iOS, tvOS, WASM). Previously, methods requiring class initialization checks would be entirely skipped during R2R compilation and interpreted at runtime. With these changes, the class initialization helpers are compiled ahead-of-time on non-JIT platforms while still allowing JIT optimization on platforms that support runtime code generation.
Changes:
  • Added two new R2R helper enum values (0x116 and 0x117) for InitClass and InitInstClass across C# and C++ codebases
  • Implemented conditional logic to use R2R helpers on iOS/WASM while allowing runtime JIT on other platforms
  • Added signature parsing support for the new helper types
Reviewed changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.
Show a summary per file
FileDescription
src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.csAdded InitClass (0x116) and InitInstClass (0x117) enum values to ReadyToRunHelper
src/coreclr/inc/readytorun.hAdded corresponding C++ enum values READYTORUN_HELPER_InitClass and READYTORUN_HELPER_InitInstClass
src/coreclr/inc/readytorunhelpers.hMapped new R2R helpers to existing CORINFO_HELP_INITCLASS and CORINFO_HELP_INITINSTCLASS JIT helpers
src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/ReadyToRunSignature.csAdded signature parsing cases for INIT_CLASS and INIT_INST_CLASS
src/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.csImplemented conditional helper resolution based on TargetAllowsRuntimeCodeGeneration flag
@build-analysisbuild-analysisBot
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Comment threadsrc/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.cs
Outdated

Comment threadsrc/coreclr/inc/readytorun.h
@build-analysisbuild-analysisBot
mentioned this pull request
Feb 24, 2026

Open

jkotas
jkotas
reviewed
Feb 24, 2026
View reviewed changes
Comment threadsrc/coreclr/inc/readytorun.h
jkotas
jkotas
reviewed
Feb 24, 2026
View reviewed changes
Comment threadsrc/coreclr/inc/readytorun.h
CopilotAI
review requested due to automatic review settings
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Pull request overview
Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.
@BrzVladBrzVlad
mentioned this pull request
Feb 24, 2026

Closed

11 tasks

This was referenced Feb 24, 2026

Open


Open


Closed

@BrzVlad
BrzVlad
merged commit 27689b6
into
dotnet:mainFeb 24, 2026

106 of 109 checks passed

@dotnet-maestrodotnet-maestroBot
mentioned this pull request
Feb 25, 2026
 Merged

iremyux pushed a commit
to iremyux/dotnet-runtime
that referenced
this pull request
Mar 2, 2026
@BrzVlad@iremyux
[r2r] Add helpers for class init (dotnet#124649)
b8d69fe
Code needing to check for class init would be skipped for R2R
compilation, probably because at runtime we would be likely to detect
the check as redundant. On iOS this means that the entire method would
be interpreted which is way more expensive than a small check for class
initialization. This commit adds a r2r helper for this, which will end
up as a call to the standard jit helper:
System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass.
In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
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@jkotasjkotasjkotas approved these changes
@MichalStrehovskyMichalStrehovskyAwaiting requested review from MichalStrehovskyMichalStrehovsky is a code owner

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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[r2r] Add helpers for class init - #124649
Merged
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
Feb 24, 2026
Merged
[r2r] Add helpers for class init#124649
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
Conversation
@BrzVlad
@BrzVladBrzVlad
commented
Feb 20, 2026

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Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();

@BrzVlad
[r2r] Add helpers for class init
8808ed5
Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
CopilotAI
review requested due to automatic review settings
February 20, 2026 14:45
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Pull request overview
This PR adds ReadyToRun (R2R) helper support for class initialization to prevent expensive interpretation on platforms without runtime JIT support (iOS, tvOS, WASM). Previously, methods requiring class initialization checks would be entirely skipped during R2R compilation and interpreted at runtime. With these changes, the class initialization helpers are compiled ahead-of-time on non-JIT platforms while still allowing JIT optimization on platforms that support runtime code generation.
Changes:
  • Added two new R2R helper enum values (0x116 and 0x117) for InitClass and InitInstClass across C# and C++ codebases
  • Implemented conditional logic to use R2R helpers on iOS/WASM while allowing runtime JIT on other platforms
  • Added signature parsing support for the new helper types
Reviewed changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.
Show a summary per file
FileDescription
src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.csAdded InitClass (0x116) and InitInstClass (0x117) enum values to ReadyToRunHelper
src/coreclr/inc/readytorun.hAdded corresponding C++ enum values READYTORUN_HELPER_InitClass and READYTORUN_HELPER_InitInstClass
src/coreclr/inc/readytorunhelpers.hMapped new R2R helpers to existing CORINFO_HELP_INITCLASS and CORINFO_HELP_INITINSTCLASS JIT helpers
src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/ReadyToRunSignature.csAdded signature parsing cases for INIT_CLASS and INIT_INST_CLASS
src/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.csImplemented conditional helper resolution based on TargetAllowsRuntimeCodeGeneration flag
@build-analysisbuild-analysisBot
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Comment threadsrc/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.cs
Outdated

Comment threadsrc/coreclr/inc/readytorun.h
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Feb 24, 2026

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Comment threadsrc/coreclr/inc/readytorun.h
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reviewed
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Comment threadsrc/coreclr/inc/readytorun.h
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Pull request overview
Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.
@BrzVladBrzVlad
mentioned this pull request
Feb 24, 2026

Closed

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This was referenced Feb 24, 2026

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BrzVlad
merged commit 27689b6
into
dotnet:mainFeb 24, 2026

106 of 109 checks passed

@dotnet-maestrodotnet-maestroBot
mentioned this pull request
Feb 25, 2026
 Merged

iremyux pushed a commit
to iremyux/dotnet-runtime
that referenced
this pull request
Mar 2, 2026
@BrzVlad@iremyux
[r2r] Add helpers for class init (dotnet#124649)
b8d69fe
Code needing to check for class init would be skipped for R2R
compilation, probably because at runtime we would be likely to detect
the check as redundant. On iOS this means that the entire method would
be interpreted which is way more expensive than a small check for class
initialization. This commit adds a r2r helper for this, which will end
up as a call to the standard jit helper:
System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass.
In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
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@jkotasjkotasjkotas approved these changes
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
[r2r] Add helpers for class init - #124649
Merged
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
Feb 24, 2026
Merged
[r2r] Add helpers for class init#124649
BrzVlad merged 3 commits into
dotnet:mainfrom 
BrzVlad:fix-r2r-class-init
Conversation
@BrzVlad
@BrzVladBrzVlad
commented
Feb 20, 2026

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Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();

@BrzVlad
[r2r] Add helpers for class init
8808ed5
Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
CopilotAI
review requested due to automatic review settings
February 20, 2026 14:45
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reviewed
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Pull request overview
This PR adds ReadyToRun (R2R) helper support for class initialization to prevent expensive interpretation on platforms without runtime JIT support (iOS, tvOS, WASM). Previously, methods requiring class initialization checks would be entirely skipped during R2R compilation and interpreted at runtime. With these changes, the class initialization helpers are compiled ahead-of-time on non-JIT platforms while still allowing JIT optimization on platforms that support runtime code generation.
Changes:
  • Added two new R2R helper enum values (0x116 and 0x117) for InitClass and InitInstClass across C# and C++ codebases
  • Implemented conditional logic to use R2R helpers on iOS/WASM while allowing runtime JIT on other platforms
  • Added signature parsing support for the new helper types
Reviewed changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.
Show a summary per file
FileDescription
src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.csAdded InitClass (0x116) and InitInstClass (0x117) enum values to ReadyToRunHelper
src/coreclr/inc/readytorun.hAdded corresponding C++ enum values READYTORUN_HELPER_InitClass and READYTORUN_HELPER_InitInstClass
src/coreclr/inc/readytorunhelpers.hMapped new R2R helpers to existing CORINFO_HELP_INITCLASS and CORINFO_HELP_INITINSTCLASS JIT helpers
src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/ReadyToRunSignature.csAdded signature parsing cases for INIT_CLASS and INIT_INST_CLASS
src/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.csImplemented conditional helper resolution based on TargetAllowsRuntimeCodeGeneration flag
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Pull request overview
Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.
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merged commit 27689b6
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[r2r] Add helpers for class init (dotnet#124649)
b8d69fe
Code needing to check for class init would be skipped for R2R
compilation, probably because at runtime we would be likely to detect
the check as redundant. On iOS this means that the entire method would
be interpreted which is way more expensive than a small check for class
initialization. This commit adds a r2r helper for this, which will end
up as a call to the standard jit helper:
System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass.
In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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[r2r] Add helpers for class init - #124649
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BrzVlad:fix-r2r-class-init
Feb 24, 2026
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[r2r] Add helpers for class init#124649
BrzVlad merged 3 commits into
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BrzVlad:fix-r2r-class-init
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Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();

@BrzVlad
[r2r] Add helpers for class init
8808ed5
Code needing to check for class init would be skipped for R2R compilation, probably because at runtime we would be likely to detect the check as redundant. On iOS this means that the entire method would be interpreted which is way more expensive than a small check for class initialization. This commit adds a r2r helper for this, which will end up as a call to the standard jit helper: System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass. In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
CopilotAI
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Pull request overview
This PR adds ReadyToRun (R2R) helper support for class initialization to prevent expensive interpretation on platforms without runtime JIT support (iOS, tvOS, WASM). Previously, methods requiring class initialization checks would be entirely skipped during R2R compilation and interpreted at runtime. With these changes, the class initialization helpers are compiled ahead-of-time on non-JIT platforms while still allowing JIT optimization on platforms that support runtime code generation.
Changes:
  • Added two new R2R helper enum values (0x116 and 0x117) for InitClass and InitInstClass across C# and C++ codebases
  • Implemented conditional logic to use R2R helpers on iOS/WASM while allowing runtime JIT on other platforms
  • Added signature parsing support for the new helper types
Reviewed changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.
Show a summary per file
FileDescription
src/coreclr/tools/Common/Internal/Runtime/ReadyToRunConstants.csAdded InitClass (0x116) and InitInstClass (0x117) enum values to ReadyToRunHelper
src/coreclr/inc/readytorun.hAdded corresponding C++ enum values READYTORUN_HELPER_InitClass and READYTORUN_HELPER_InitInstClass
src/coreclr/inc/readytorunhelpers.hMapped new R2R helpers to existing CORINFO_HELP_INITCLASS and CORINFO_HELP_INITINSTCLASS JIT helpers
src/coreclr/tools/aot/ILCompiler.Reflection.ReadyToRun/ReadyToRunSignature.csAdded signature parsing cases for INIT_CLASS and INIT_INST_CLASS
src/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.csImplemented conditional helper resolution based on TargetAllowsRuntimeCodeGeneration flag
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Comment threadsrc/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.cs
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Comment threadsrc/coreclr/inc/readytorun.h
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Feb 24, 2026

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Comment threadsrc/coreclr/inc/readytorun.h
jkotas
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Comment threadsrc/coreclr/inc/readytorun.h
CopilotAI
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February 24, 2026 14:20
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Pull request overview
Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.
@BrzVladBrzVlad
mentioned this pull request
Feb 24, 2026

Closed

11 tasks

This was referenced Feb 24, 2026

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@BrzVlad
BrzVlad
merged commit 27689b6
into
dotnet:mainFeb 24, 2026

106 of 109 checks passed

@dotnet-maestrodotnet-maestroBot
mentioned this pull request
Feb 25, 2026
 Merged

iremyux pushed a commit
to iremyux/dotnet-runtime
that referenced
this pull request
Mar 2, 2026
@BrzVlad@iremyux
[r2r] Add helpers for class init (dotnet#124649)
b8d69fe
Code needing to check for class init would be skipped for R2R
compilation, probably because at runtime we would be likely to detect
the check as redundant. On iOS this means that the entire method would
be interpreted which is way more expensive than a small check for class
initialization. This commit adds a r2r helper for this, which will end
up as a call to the standard jit helper:
System.Runtime.CompilerServices.Helpers.InitClass/InitInstantiatedClass.
In the example below, G<>.Touch was skipped in R2R.
```
public class G<T>
{
static Type theType;
static G()
{
theType = typeof(T);
}
[MethodImpl(MethodImplOptions.NoInlining)]
public static Type Touch()
{
return theType;
}
}
G<string>.Touch();
```
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Copilot left review comments
@jkotasjkotasjkotas approved these changes
@MichalStrehovskyMichalStrehovskyAwaiting requested review from MichalStrehovskyMichalStrehovsky is a code owner

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