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Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount #129263

Closed
#129343
Closed
Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount#129263
#129343
Assignees
AndyAyersMSadamperlin
Labels
arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

Description

@AndyAyersMS
AndyAyersMS
opened on Jun 10, 2026

Compiling src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884.il
for Wasm R2R hits an assert in genCodeForShift:

src\coreclr\jit\codegenwasm.cpp:1820
Assertion failed 'treeNode->gtGetOp2()->TypeIs(TYP_INT)' in
'ILGEN_0x3c109d11:Method_0x52483fac(short,double,byte,sbyte,double):int'
during 'Generate code' (IL size 493; hash 0xde5c0090; FullOpts)

The asserting code handles a TYP_LONG shift / rotate and expects its
second operand (shift amount) to already be TYP_INT:

// codegenwasm.cpp, CodeGen::genCodeForShiftif (treeNode->TypeIs(TYP_LONG))
{
assert(treeNode->gtGetOp2()->TypeIs(TYP_INT));
// Zero-extend the shift amount to 64 bits for long shifts/rotates.GetEmitter()->emitIns(INS_i64_extend_u_i32);
}

For this test (a generated stress test full of shr.un on int64
locals/arrays) some shift's op2 doesn't reach codegen as TYP_INT,
so the assert fires and crossgen2 exits with -2147483645
(STATUS_BREAKPOINT). The test source includes:

.locals (int8[] local_0x0, unsignedint64 local_0x1, ...)
...
shr.un ;; on unsignedint64 with various-typed shift amounts

This blocks the merged R2R image build for both Regression_6 (M11/M12
CLR-x86 tests) and Regression_7 (M09.5/M10 CLR-x86 tests). Because the
assert fires at R2R compile time, the runtime-side
DOTNET_ReadyToRunExcludeList workaround used in #128234 does not help.

Repro

.\build clr+libs -rc debug -c release -os browser
.\src\tests\build skipmanaged browser
;; put repo dotnet in path
set DOTNET_ROOT=<REPO_ROOT>\.dotnet
set PATH=<REPO_ROOT>\.dotnet;%PATH%
cd src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884
dotnet msbuild /p:TargetArchitecture=wasm /p:TargetOS=browser /p:RuntimeFlavor=coreclr ^
/p:BuildAsStandalone=true b53884.ilproj
set CORE_ROOT=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root
set DLL=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884\b53884.dll
set CG2DIR=<REPO_ROOT>\artifacts\bin\crossgen2_inbuild\wasm\Debug
dotnet %CG2DIR%\crossgen2.dll ^
--targetos:windows --targetarch:wasm ^
--jitpath %CG2DIR%\clrjit_universal_wasm_x64.dll ^
--inputbubble ^
-r:%CORE_ROOT%\*.dll ^
-o:b53884.wasm ^
--parallelism 1 ^
%DLL%

Hit on wasm-eh-infra (and on any branch built on top of it, e.g. PR #129197).

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observer.observe(document.body, { childList: true, subtree: true });
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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" + '
Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount · Issue #129263 · dotnet/runtime · GitHub
    Skip to content
    Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount #129263
    Closed
    #129343
    Closed
    Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount#129263
    #129343
    Assignees
    AndyAyersMSadamperlin
    Labels
    arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
    Description
    @AndyAyersMS
    AndyAyersMS
    opened on Jun 10, 2026
    Compiling src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884.il
    
for Wasm R2R hits an assert in genCodeForShift:
    src\coreclr\jit\codegenwasm.cpp:1820
Assertion failed 'treeNode->gtGetOp2()->TypeIs(TYP_INT)' in
'ILGEN_0x3c109d11:Method_0x52483fac(short,double,byte,sbyte,double):int'
during 'Generate code' (IL size 493; hash 0xde5c0090; FullOpts)

    The asserting code handles a TYP_LONG shift / rotate and expects its
    
second operand (shift amount) to already be TYP_INT:
    // codegenwasm.cpp, CodeGen::genCodeForShiftif (treeNode->TypeIs(TYP_LONG))
{
assert(treeNode->gtGetOp2()->TypeIs(TYP_INT));
// Zero-extend the shift amount to 64 bits for long shifts/rotates.GetEmitter()->emitIns(INS_i64_extend_u_i32);
}
    For this test (a generated stress test full of shr.un on int64
    
locals/arrays) some shift's op2 doesn't reach codegen as TYP_INT,
    
so the assert fires and crossgen2 exits with -2147483645
    
(STATUS_BREAKPOINT). The test source includes:
    .locals (int8[] local_0x0, unsignedint64 local_0x1, ...)
...
shr.un ;; on unsignedint64 with various-typed shift amounts
    This blocks the merged R2R image build for both Regression_6 (M11/M12
    
CLR-x86 tests) and Regression_7 (M09.5/M10 CLR-x86 tests). Because the
    
assert fires at R2R compile time, the runtime-side
    DOTNET_ReadyToRunExcludeList workaround used in #128234 does not help.
    Repro
    .\build clr+libs -rc debug -c release -os browser
.\src\tests\build skipmanaged browser
;; put repo dotnet in path
set DOTNET_ROOT=<REPO_ROOT>\.dotnet
set PATH=<REPO_ROOT>\.dotnet;%PATH%
cd src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884
dotnet msbuild /p:TargetArchitecture=wasm /p:TargetOS=browser /p:RuntimeFlavor=coreclr ^
/p:BuildAsStandalone=true b53884.ilproj
set CORE_ROOT=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root
set DLL=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884\b53884.dll
set CG2DIR=<REPO_ROOT>\artifacts\bin\crossgen2_inbuild\wasm\Debug
dotnet %CG2DIR%\crossgen2.dll ^
--targetos:windows --targetarch:wasm ^
--jitpath %CG2DIR%\clrjit_universal_wasm_x64.dll ^
--inputbubble ^
-r:%CORE_ROOT%\*.dll ^
-o:b53884.wasm ^
--parallelism 1 ^
%DLL%

    Hit on wasm-eh-infra (and on any branch built on top of it, e.g. PR #129197).
    Metadata
    Metadata
    Assignees
    Labels
    arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
    Type
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    No projects
      Milestone
      No milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount · Issue #129263 · dotnet/runtime · GitHub
      Skip to content
      Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount #129263
      Closed
      #129343
      Closed
      Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount#129263
      #129343
      Assignees
      AndyAyersMSadamperlin
      Labels
      arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
      Description
      @AndyAyersMS
      AndyAyersMS
      opened on Jun 10, 2026
      Compiling src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884.il
      
for Wasm R2R hits an assert in genCodeForShift:
      src\coreclr\jit\codegenwasm.cpp:1820
Assertion failed 'treeNode->gtGetOp2()->TypeIs(TYP_INT)' in
'ILGEN_0x3c109d11:Method_0x52483fac(short,double,byte,sbyte,double):int'
during 'Generate code' (IL size 493; hash 0xde5c0090; FullOpts)

      The asserting code handles a TYP_LONG shift / rotate and expects its
      
second operand (shift amount) to already be TYP_INT:
      // codegenwasm.cpp, CodeGen::genCodeForShiftif (treeNode->TypeIs(TYP_LONG))
{
assert(treeNode->gtGetOp2()->TypeIs(TYP_INT));
// Zero-extend the shift amount to 64 bits for long shifts/rotates.GetEmitter()->emitIns(INS_i64_extend_u_i32);
}
      For this test (a generated stress test full of shr.un on int64
      
locals/arrays) some shift's op2 doesn't reach codegen as TYP_INT,
      
so the assert fires and crossgen2 exits with -2147483645
      
(STATUS_BREAKPOINT). The test source includes:
      .locals (int8[] local_0x0, unsignedint64 local_0x1, ...)
...
shr.un ;; on unsignedint64 with various-typed shift amounts
      This blocks the merged R2R image build for both Regression_6 (M11/M12
      
CLR-x86 tests) and Regression_7 (M09.5/M10 CLR-x86 tests). Because the
      
assert fires at R2R compile time, the runtime-side
      DOTNET_ReadyToRunExcludeList workaround used in #128234 does not help.
      Repro
      .\build clr+libs -rc debug -c release -os browser
.\src\tests\build skipmanaged browser
;; put repo dotnet in path
set DOTNET_ROOT=<REPO_ROOT>\.dotnet
set PATH=<REPO_ROOT>\.dotnet;%PATH%
cd src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884
dotnet msbuild /p:TargetArchitecture=wasm /p:TargetOS=browser /p:RuntimeFlavor=coreclr ^
/p:BuildAsStandalone=true b53884.ilproj
set CORE_ROOT=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root
set DLL=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884\b53884.dll
set CG2DIR=<REPO_ROOT>\artifacts\bin\crossgen2_inbuild\wasm\Debug
dotnet %CG2DIR%\crossgen2.dll ^
--targetos:windows --targetarch:wasm ^
--jitpath %CG2DIR%\clrjit_universal_wasm_x64.dll ^
--inputbubble ^
-r:%CORE_ROOT%\*.dll ^
-o:b53884.wasm ^
--parallelism 1 ^
%DLL%

      Hit on wasm-eh-infra (and on any branch built on top of it, e.g. PR #129197).
      Metadata
      Metadata
      Assignees
      Labels
      arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
      Type
      No type
      Projects
      No projects
        Milestone
        No milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount · Issue #129263 · dotnet/runtime · GitHub
        Skip to content
        Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount #129263
        Closed
        #129343
        Closed
        Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount#129263
        #129343
        Assignees
        AndyAyersMSadamperlin
        Labels
        arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
        Description
        @AndyAyersMS
        AndyAyersMS
        opened on Jun 10, 2026
        Compiling src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884.il
        
for Wasm R2R hits an assert in genCodeForShift:
        src\coreclr\jit\codegenwasm.cpp:1820
Assertion failed 'treeNode->gtGetOp2()->TypeIs(TYP_INT)' in
'ILGEN_0x3c109d11:Method_0x52483fac(short,double,byte,sbyte,double):int'
during 'Generate code' (IL size 493; hash 0xde5c0090; FullOpts)

        The asserting code handles a TYP_LONG shift / rotate and expects its
        
second operand (shift amount) to already be TYP_INT:
        // codegenwasm.cpp, CodeGen::genCodeForShiftif (treeNode->TypeIs(TYP_LONG))
{
assert(treeNode->gtGetOp2()->TypeIs(TYP_INT));
// Zero-extend the shift amount to 64 bits for long shifts/rotates.GetEmitter()->emitIns(INS_i64_extend_u_i32);
}
        For this test (a generated stress test full of shr.un on int64
        
locals/arrays) some shift's op2 doesn't reach codegen as TYP_INT,
        
so the assert fires and crossgen2 exits with -2147483645
        
(STATUS_BREAKPOINT). The test source includes:
        .locals (int8[] local_0x0, unsignedint64 local_0x1, ...)
...
shr.un ;; on unsignedint64 with various-typed shift amounts
        This blocks the merged R2R image build for both Regression_6 (M11/M12
        
CLR-x86 tests) and Regression_7 (M09.5/M10 CLR-x86 tests). Because the
        
assert fires at R2R compile time, the runtime-side
        DOTNET_ReadyToRunExcludeList workaround used in #128234 does not help.
        Repro
        .\build clr+libs -rc debug -c release -os browser
.\src\tests\build skipmanaged browser
;; put repo dotnet in path
set DOTNET_ROOT=<REPO_ROOT>\.dotnet
set PATH=<REPO_ROOT>\.dotnet;%PATH%
cd src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884
dotnet msbuild /p:TargetArchitecture=wasm /p:TargetOS=browser /p:RuntimeFlavor=coreclr ^
/p:BuildAsStandalone=true b53884.ilproj
set CORE_ROOT=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root
set DLL=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884\b53884.dll
set CG2DIR=<REPO_ROOT>\artifacts\bin\crossgen2_inbuild\wasm\Debug
dotnet %CG2DIR%\crossgen2.dll ^
--targetos:windows --targetarch:wasm ^
--jitpath %CG2DIR%\clrjit_universal_wasm_x64.dll ^
--inputbubble ^
-r:%CORE_ROOT%\*.dll ^
-o:b53884.wasm ^
--parallelism 1 ^
%DLL%

        Hit on wasm-eh-infra (and on any branch built on top of it, e.g. PR #129197).
        Metadata
        Metadata
        Assignees
        Labels
        arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
        Type
        No type
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount · Issue #129263 · dotnet/runtime · GitHub
          Skip to content
          Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount #129263
          Closed
          #129343
          Closed
          Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount#129263
          #129343
          Assignees
          AndyAyersMSadamperlin
          Labels
          arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
          Description
          @AndyAyersMS
          AndyAyersMS
          opened on Jun 10, 2026
          Compiling src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884.il
          
for Wasm R2R hits an assert in genCodeForShift:
          src\coreclr\jit\codegenwasm.cpp:1820
Assertion failed 'treeNode->gtGetOp2()->TypeIs(TYP_INT)' in
'ILGEN_0x3c109d11:Method_0x52483fac(short,double,byte,sbyte,double):int'
during 'Generate code' (IL size 493; hash 0xde5c0090; FullOpts)

          The asserting code handles a TYP_LONG shift / rotate and expects its
          
second operand (shift amount) to already be TYP_INT:
          // codegenwasm.cpp, CodeGen::genCodeForShiftif (treeNode->TypeIs(TYP_LONG))
{
assert(treeNode->gtGetOp2()->TypeIs(TYP_INT));
// Zero-extend the shift amount to 64 bits for long shifts/rotates.GetEmitter()->emitIns(INS_i64_extend_u_i32);
}
          For this test (a generated stress test full of shr.un on int64
          
locals/arrays) some shift's op2 doesn't reach codegen as TYP_INT,
          
so the assert fires and crossgen2 exits with -2147483645
          
(STATUS_BREAKPOINT). The test source includes:
          .locals (int8[] local_0x0, unsignedint64 local_0x1, ...)
...
shr.un ;; on unsignedint64 with various-typed shift amounts
          This blocks the merged R2R image build for both Regression_6 (M11/M12
          
CLR-x86 tests) and Regression_7 (M09.5/M10 CLR-x86 tests). Because the
          
assert fires at R2R compile time, the runtime-side
          DOTNET_ReadyToRunExcludeList workaround used in #128234 does not help.
          Repro
          .\build clr+libs -rc debug -c release -os browser
.\src\tests\build skipmanaged browser
;; put repo dotnet in path
set DOTNET_ROOT=<REPO_ROOT>\.dotnet
set PATH=<REPO_ROOT>\.dotnet;%PATH%
cd src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884
dotnet msbuild /p:TargetArchitecture=wasm /p:TargetOS=browser /p:RuntimeFlavor=coreclr ^
/p:BuildAsStandalone=true b53884.ilproj
set CORE_ROOT=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root
set DLL=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884\b53884.dll
set CG2DIR=<REPO_ROOT>\artifacts\bin\crossgen2_inbuild\wasm\Debug
dotnet %CG2DIR%\crossgen2.dll ^
--targetos:windows --targetarch:wasm ^
--jitpath %CG2DIR%\clrjit_universal_wasm_x64.dll ^
--inputbubble ^
-r:%CORE_ROOT%\*.dll ^
-o:b53884.wasm ^
--parallelism 1 ^
%DLL%

          Hit on wasm-eh-infra (and on any branch built on top of it, e.g. PR #129197).
          Metadata
          Metadata
          Assignees
          Labels
          arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
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            No milestone
            Relationships
            None yet
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            No branches or pull requests
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount · Issue #129263 · dotnet/runtime · GitHub
            Skip to content
            Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount #129263
            Closed
            #129343
            Closed
            Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount#129263
            #129343
            Assignees
            AndyAyersMSadamperlin
            Labels
            arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
            Description
            @AndyAyersMS
            AndyAyersMS
            opened on Jun 10, 2026
            Compiling src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884.il
            
for Wasm R2R hits an assert in genCodeForShift:
            src\coreclr\jit\codegenwasm.cpp:1820
Assertion failed 'treeNode->gtGetOp2()->TypeIs(TYP_INT)' in
'ILGEN_0x3c109d11:Method_0x52483fac(short,double,byte,sbyte,double):int'
during 'Generate code' (IL size 493; hash 0xde5c0090; FullOpts)

            The asserting code handles a TYP_LONG shift / rotate and expects its
            
second operand (shift amount) to already be TYP_INT:
            // codegenwasm.cpp, CodeGen::genCodeForShiftif (treeNode->TypeIs(TYP_LONG))
{
assert(treeNode->gtGetOp2()->TypeIs(TYP_INT));
// Zero-extend the shift amount to 64 bits for long shifts/rotates.GetEmitter()->emitIns(INS_i64_extend_u_i32);
}
            For this test (a generated stress test full of shr.un on int64
            
locals/arrays) some shift's op2 doesn't reach codegen as TYP_INT,
            
so the assert fires and crossgen2 exits with -2147483645
            
(STATUS_BREAKPOINT). The test source includes:
            .locals (int8[] local_0x0, unsignedint64 local_0x1, ...)
...
shr.un ;; on unsignedint64 with various-typed shift amounts
            This blocks the merged R2R image build for both Regression_6 (M11/M12
            
CLR-x86 tests) and Regression_7 (M09.5/M10 CLR-x86 tests). Because the
            
assert fires at R2R compile time, the runtime-side
            DOTNET_ReadyToRunExcludeList workaround used in #128234 does not help.
            Repro
            .\build clr+libs -rc debug -c release -os browser
.\src\tests\build skipmanaged browser
;; put repo dotnet in path
set DOTNET_ROOT=<REPO_ROOT>\.dotnet
set PATH=<REPO_ROOT>\.dotnet;%PATH%
cd src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884
dotnet msbuild /p:TargetArchitecture=wasm /p:TargetOS=browser /p:RuntimeFlavor=coreclr ^
/p:BuildAsStandalone=true b53884.ilproj
set CORE_ROOT=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root
set DLL=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884\b53884.dll
set CG2DIR=<REPO_ROOT>\artifacts\bin\crossgen2_inbuild\wasm\Debug
dotnet %CG2DIR%\crossgen2.dll ^
--targetos:windows --targetarch:wasm ^
--jitpath %CG2DIR%\clrjit_universal_wasm_x64.dll ^
--inputbubble ^
-r:%CORE_ROOT%\*.dll ^
-o:b53884.wasm ^
--parallelism 1 ^
%DLL%

            Hit on wasm-eh-infra (and on any branch built on top of it, e.g. PR #129197).
            Metadata
            Metadata
            Assignees
            Labels
            arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount · Issue #129263 · dotnet/runtime · GitHub
              Skip to content
              Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount #129263
              Closed
              #129343
              Closed
              Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount#129263
              #129343
              Assignees
              AndyAyersMSadamperlin
              Labels
              arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
              Description
              @AndyAyersMS
              AndyAyersMS
              opened on Jun 10, 2026
              Compiling src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884.il
              
for Wasm R2R hits an assert in genCodeForShift:
              src\coreclr\jit\codegenwasm.cpp:1820
Assertion failed 'treeNode->gtGetOp2()->TypeIs(TYP_INT)' in
'ILGEN_0x3c109d11:Method_0x52483fac(short,double,byte,sbyte,double):int'
during 'Generate code' (IL size 493; hash 0xde5c0090; FullOpts)

              The asserting code handles a TYP_LONG shift / rotate and expects its
              
second operand (shift amount) to already be TYP_INT:
              // codegenwasm.cpp, CodeGen::genCodeForShiftif (treeNode->TypeIs(TYP_LONG))
{
assert(treeNode->gtGetOp2()->TypeIs(TYP_INT));
// Zero-extend the shift amount to 64 bits for long shifts/rotates.GetEmitter()->emitIns(INS_i64_extend_u_i32);
}
              For this test (a generated stress test full of shr.un on int64
              
locals/arrays) some shift's op2 doesn't reach codegen as TYP_INT,
              
so the assert fires and crossgen2 exits with -2147483645
              
(STATUS_BREAKPOINT). The test source includes:
              .locals (int8[] local_0x0, unsignedint64 local_0x1, ...)
...
shr.un ;; on unsignedint64 with various-typed shift amounts
              This blocks the merged R2R image build for both Regression_6 (M11/M12
              
CLR-x86 tests) and Regression_7 (M09.5/M10 CLR-x86 tests). Because the
              
assert fires at R2R compile time, the runtime-side
              DOTNET_ReadyToRunExcludeList workaround used in #128234 does not help.
              Repro
              .\build clr+libs -rc debug -c release -os browser
.\src\tests\build skipmanaged browser
;; put repo dotnet in path
set DOTNET_ROOT=<REPO_ROOT>\.dotnet
set PATH=<REPO_ROOT>\.dotnet;%PATH%
cd src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884
dotnet msbuild /p:TargetArchitecture=wasm /p:TargetOS=browser /p:RuntimeFlavor=coreclr ^
/p:BuildAsStandalone=true b53884.ilproj
set CORE_ROOT=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root
set DLL=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884\b53884.dll
set CG2DIR=<REPO_ROOT>\artifacts\bin\crossgen2_inbuild\wasm\Debug
dotnet %CG2DIR%\crossgen2.dll ^
--targetos:windows --targetarch:wasm ^
--jitpath %CG2DIR%\clrjit_universal_wasm_x64.dll ^
--inputbubble ^
-r:%CORE_ROOT%\*.dll ^
-o:b53884.wasm ^
--parallelism 1 ^
%DLL%

              Hit on wasm-eh-infra (and on any branch built on top of it, e.g. PR #129197).
              Metadata
              Metadata
              Assignees
              Labels
              arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
              Type
              No type
              Projects
              No projects
                Milestone
                No milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount · Issue #129263 · dotnet/runtime · GitHub
                Skip to content
                Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount #129263
                Closed
                #129343
                Closed
                Wasm / R2R: crossgen2 assert in genCodeForShift on long shift with non-INT shift amount#129263
                #129343
                Assignees
                AndyAyersMSadamperlin
                Labels
                arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
                Description
                @AndyAyersMS
                AndyAyersMS
                opened on Jun 10, 2026
                Compiling src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884.il
                
for Wasm R2R hits an assert in genCodeForShift:
                src\coreclr\jit\codegenwasm.cpp:1820
Assertion failed 'treeNode->gtGetOp2()->TypeIs(TYP_INT)' in
'ILGEN_0x3c109d11:Method_0x52483fac(short,double,byte,sbyte,double):int'
during 'Generate code' (IL size 493; hash 0xde5c0090; FullOpts)

                The asserting code handles a TYP_LONG shift / rotate and expects its
                
second operand (shift amount) to already be TYP_INT:
                // codegenwasm.cpp, CodeGen::genCodeForShiftif (treeNode->TypeIs(TYP_LONG))
{
assert(treeNode->gtGetOp2()->TypeIs(TYP_INT));
// Zero-extend the shift amount to 64 bits for long shifts/rotates.GetEmitter()->emitIns(INS_i64_extend_u_i32);
}
                For this test (a generated stress test full of shr.un on int64
                
locals/arrays) some shift's op2 doesn't reach codegen as TYP_INT,
                
so the assert fires and crossgen2 exits with -2147483645
                
(STATUS_BREAKPOINT). The test source includes:
                .locals (int8[] local_0x0, unsignedint64 local_0x1, ...)
...
shr.un ;; on unsignedint64 with various-typed shift amounts
                This blocks the merged R2R image build for both Regression_6 (M11/M12
                
CLR-x86 tests) and Regression_7 (M09.5/M10 CLR-x86 tests). Because the
                
assert fires at R2R compile time, the runtime-side
                DOTNET_ReadyToRunExcludeList workaround used in #128234 does not help.
                Repro
                .\build clr+libs -rc debug -c release -os browser
.\src\tests\build skipmanaged browser
;; put repo dotnet in path
set DOTNET_ROOT=<REPO_ROOT>\.dotnet
set PATH=<REPO_ROOT>\.dotnet;%PATH%
cd src\tests\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884
dotnet msbuild /p:TargetArchitecture=wasm /p:TargetOS=browser /p:RuntimeFlavor=coreclr ^
/p:BuildAsStandalone=true b53884.ilproj
set CORE_ROOT=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\Tests\Core_Root
set DLL=<REPO_ROOT>\artifacts\tests\coreclr\browser.wasm.Debug\JIT\Regression\CLR-x86-JIT\V1-M12-Beta2\b53884\b53884\b53884.dll
set CG2DIR=<REPO_ROOT>\artifacts\bin\crossgen2_inbuild\wasm\Debug
dotnet %CG2DIR%\crossgen2.dll ^
--targetos:windows --targetarch:wasm ^
--jitpath %CG2DIR%\clrjit_universal_wasm_x64.dll ^
--inputbubble ^
-r:%CORE_ROOT%\*.dll ^
-o:b53884.wasm ^
--parallelism 1 ^
%DLL%

                Hit on wasm-eh-infra (and on any branch built on top of it, e.g. PR #129197).
                Metadata
                Metadata
                Assignees
                Labels
                arch-wasmWebAssembly architecturearea-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
                Type
                No type
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions