JIT: Fix check for cast type for cast on top of address - #118019

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006
Jul 25, 2025
Merged

JIT: Fix check for cast type for cast on top of address#118019
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006

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The failing test in #118006 casts addresses of locals to small types, and this check was not checking the right type to filter out those casts.

Fix#118006

CopilotAI review requested due to automatic review settings July 24, 2025 12:19
@github-actionsgithub-actionsBot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 24, 2025

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Pull Request Overview

This PR fixes a bug in the JIT compiler's cast type checking logic when dealing with address casts. The issue was that the code was incorrectly checking the node's type instead of the cast's target type when filtering out casts of local addresses to small types.

  • Replaces direct type checking with proper cast target type validation
  • Adds proper code block structure around the GT_CAST case
  • Fixes the logic to correctly identify pointer-type casts

Comment threadsrc/coreclr/jit/lclmorph.cpp Outdated
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
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cc @dotnet/jit-contrib PTAL @EgorBo

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/azp run runtime-coreclr superpmi-diffs

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Had to push another commit to check for TYP_U_IMPL as well.

@jakobbotsch
jakobbotsch merged commit c58b659 into dotnet:mainJul 25, 2025
110 checks passed
@jakobbotsch
jakobbotsch deleted the fix-118006 branch July 25, 2025 17:43
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Test failure: JIT/IL_Conformance/Old/directed/ldloca_s_i1/ldloca_s_i1.dll

3 participants

@jakobbotsch@EgorBo
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} 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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JIT: Fix check for cast type for cast on top of address - #118019

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006
Jul 25, 2025
Merged

JIT: Fix check for cast type for cast on top of address#118019
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006

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The failing test in #118006 casts addresses of locals to small types, and this check was not checking the right type to filter out those casts.

Fix#118006

CopilotAI review requested due to automatic review settings July 24, 2025 12:19
@github-actionsgithub-actionsBot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 24, 2025

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Pull Request Overview

This PR fixes a bug in the JIT compiler's cast type checking logic when dealing with address casts. The issue was that the code was incorrectly checking the node's type instead of the cast's target type when filtering out casts of local addresses to small types.

  • Replaces direct type checking with proper cast target type validation
  • Adds proper code block structure around the GT_CAST case
  • Fixes the logic to correctly identify pointer-type casts

Comment threadsrc/coreclr/jit/lclmorph.cpp Outdated
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
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cc @dotnet/jit-contrib PTAL @EgorBo

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/azp run runtime-coreclr superpmi-diffs

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Azure Pipelines successfully started running 1 pipeline(s).

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Had to push another commit to check for TYP_U_IMPL as well.

@jakobbotsch
jakobbotsch merged commit c58b659 into dotnet:mainJul 25, 2025
110 checks passed
@jakobbotsch
jakobbotsch deleted the fix-118006 branch July 25, 2025 17:43
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Test failure: JIT/IL_Conformance/Old/directed/ldloca_s_i1/ldloca_s_i1.dll

3 participants

@jakobbotsch@EgorBo
, '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('^' + ".*" + '
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JIT: Fix check for cast type for cast on top of address - #118019

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006
Jul 25, 2025
Merged

JIT: Fix check for cast type for cast on top of address#118019
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006

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The failing test in #118006 casts addresses of locals to small types, and this check was not checking the right type to filter out those casts.

Fix#118006

CopilotAI review requested due to automatic review settings July 24, 2025 12:19
@github-actionsgithub-actionsBot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 24, 2025

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Pull Request Overview

This PR fixes a bug in the JIT compiler's cast type checking logic when dealing with address casts. The issue was that the code was incorrectly checking the node's type instead of the cast's target type when filtering out casts of local addresses to small types.

  • Replaces direct type checking with proper cast target type validation
  • Adds proper code block structure around the GT_CAST case
  • Fixes the logic to correctly identify pointer-type casts

Comment threadsrc/coreclr/jit/lclmorph.cpp Outdated
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

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cc @dotnet/jit-contrib PTAL @EgorBo

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/azp run runtime-coreclr superpmi-diffs

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Azure Pipelines successfully started running 1 pipeline(s).

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Had to push another commit to check for TYP_U_IMPL as well.

@jakobbotsch
jakobbotsch merged commit c58b659 into dotnet:mainJul 25, 2025
110 checks passed
@jakobbotsch
jakobbotsch deleted the fix-118006 branch July 25, 2025 17:43
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Test failure: JIT/IL_Conformance/Old/directed/ldloca_s_i1/ldloca_s_i1.dll

3 participants

@jakobbotsch@EgorBo
, '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('^' + ".*" + '
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JIT: Fix check for cast type for cast on top of address - #118019

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006
Jul 25, 2025
Merged

JIT: Fix check for cast type for cast on top of address#118019
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006

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The failing test in #118006 casts addresses of locals to small types, and this check was not checking the right type to filter out those casts.

Fix#118006

CopilotAI review requested due to automatic review settings July 24, 2025 12:19
@github-actionsgithub-actionsBot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 24, 2025

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Pull Request Overview

This PR fixes a bug in the JIT compiler's cast type checking logic when dealing with address casts. The issue was that the code was incorrectly checking the node's type instead of the cast's target type when filtering out casts of local addresses to small types.

  • Replaces direct type checking with proper cast target type validation
  • Adds proper code block structure around the GT_CAST case
  • Fixes the logic to correctly identify pointer-type casts

Comment threadsrc/coreclr/jit/lclmorph.cpp Outdated
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

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cc @dotnet/jit-contrib PTAL @EgorBo

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/azp run runtime-coreclr superpmi-diffs

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Azure Pipelines successfully started running 1 pipeline(s).

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Had to push another commit to check for TYP_U_IMPL as well.

@jakobbotsch
jakobbotsch merged commit c58b659 into dotnet:mainJul 25, 2025
110 checks passed
@jakobbotsch
jakobbotsch deleted the fix-118006 branch July 25, 2025 17:43
@github-actionsgithub-actionsBot locked and limited conversation to collaborators Aug 25, 2025
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Test failure: JIT/IL_Conformance/Old/directed/ldloca_s_i1/ldloca_s_i1.dll

3 participants

@jakobbotsch@EgorBo
, '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" + '
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JIT: Fix check for cast type for cast on top of address - #118019

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006
Jul 25, 2025
Merged

JIT: Fix check for cast type for cast on top of address#118019
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006

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The failing test in #118006 casts addresses of locals to small types, and this check was not checking the right type to filter out those casts.

Fix#118006

CopilotAI review requested due to automatic review settings July 24, 2025 12:19
@github-actionsgithub-actionsBot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 24, 2025

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Pull Request Overview

This PR fixes a bug in the JIT compiler's cast type checking logic when dealing with address casts. The issue was that the code was incorrectly checking the node's type instead of the cast's target type when filtering out casts of local addresses to small types.

  • Replaces direct type checking with proper cast target type validation
  • Adds proper code block structure around the GT_CAST case
  • Fixes the logic to correctly identify pointer-type casts

Comment threadsrc/coreclr/jit/lclmorph.cpp Outdated
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

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cc @dotnet/jit-contrib PTAL @EgorBo

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/azp run runtime-coreclr superpmi-diffs

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Azure Pipelines successfully started running 1 pipeline(s).

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Had to push another commit to check for TYP_U_IMPL as well.

@jakobbotsch
jakobbotsch merged commit c58b659 into dotnet:mainJul 25, 2025
110 checks passed
@jakobbotsch
jakobbotsch deleted the fix-118006 branch July 25, 2025 17:43
@github-actionsgithub-actionsBot locked and limited conversation to collaborators Aug 25, 2025
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Test failure: JIT/IL_Conformance/Old/directed/ldloca_s_i1/ldloca_s_i1.dll

3 participants

@jakobbotsch@EgorBo
, '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('^' + ".*" + '
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JIT: Fix check for cast type for cast on top of address - #118019

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006
Jul 25, 2025
Merged

JIT: Fix check for cast type for cast on top of address#118019
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006

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The failing test in #118006 casts addresses of locals to small types, and this check was not checking the right type to filter out those casts.

Fix#118006

CopilotAI review requested due to automatic review settings July 24, 2025 12:19
@github-actionsgithub-actionsBot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 24, 2025

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Pull Request Overview

This PR fixes a bug in the JIT compiler's cast type checking logic when dealing with address casts. The issue was that the code was incorrectly checking the node's type instead of the cast's target type when filtering out casts of local addresses to small types.

  • Replaces direct type checking with proper cast target type validation
  • Adds proper code block structure around the GT_CAST case
  • Fixes the logic to correctly identify pointer-type casts

Comment threadsrc/coreclr/jit/lclmorph.cpp Outdated
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

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cc @dotnet/jit-contrib PTAL @EgorBo

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/azp run runtime-coreclr superpmi-diffs

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Azure Pipelines successfully started running 1 pipeline(s).

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Had to push another commit to check for TYP_U_IMPL as well.

@jakobbotsch
jakobbotsch merged commit c58b659 into dotnet:mainJul 25, 2025
110 checks passed
@jakobbotsch
jakobbotsch deleted the fix-118006 branch July 25, 2025 17:43
@github-actionsgithub-actionsBot locked and limited conversation to collaborators Aug 25, 2025
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Test failure: JIT/IL_Conformance/Old/directed/ldloca_s_i1/ldloca_s_i1.dll

3 participants

@jakobbotsch@EgorBo
, '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

JIT: Fix check for cast type for cast on top of address - #118019

Merged
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006
Jul 25, 2025
Merged

JIT: Fix check for cast type for cast on top of address#118019
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006

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The failing test in #118006 casts addresses of locals to small types, and this check was not checking the right type to filter out those casts.

Fix#118006

CopilotAI review requested due to automatic review settings July 24, 2025 12:19
@github-actionsgithub-actionsBot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 24, 2025

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Pull Request Overview

This PR fixes a bug in the JIT compiler's cast type checking logic when dealing with address casts. The issue was that the code was incorrectly checking the node's type instead of the cast's target type when filtering out casts of local addresses to small types.

  • Replaces direct type checking with proper cast target type validation
  • Adds proper code block structure around the GT_CAST case
  • Fixes the logic to correctly identify pointer-type casts

Comment threadsrc/coreclr/jit/lclmorph.cpp Outdated
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cc @dotnet/jit-contrib PTAL @EgorBo

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/azp run runtime-coreclr superpmi-diffs

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Had to push another commit to check for TYP_U_IMPL as well.

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jakobbotsch merged commit c58b659 into dotnet:mainJul 25, 2025
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jakobbotsch deleted the fix-118006 branch July 25, 2025 17:43
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Test failure: JIT/IL_Conformance/Old/directed/ldloca_s_i1/ldloca_s_i1.dll

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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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JIT: Fix check for cast type for cast on top of address - #118019

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jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006
Jul 25, 2025
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JIT: Fix check for cast type for cast on top of address#118019
jakobbotsch merged 2 commits into
dotnet:mainfrom
jakobbotsch:fix-118006

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The failing test in #118006 casts addresses of locals to small types, and this check was not checking the right type to filter out those casts.

Fix#118006

CopilotAI review requested due to automatic review settings July 24, 2025 12:19
@github-actionsgithub-actionsBot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 24, 2025

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Pull Request Overview

This PR fixes a bug in the JIT compiler's cast type checking logic when dealing with address casts. The issue was that the code was incorrectly checking the node's type instead of the cast's target type when filtering out casts of local addresses to small types.

  • Replaces direct type checking with proper cast target type validation
  • Adds proper code block structure around the GT_CAST case
  • Fixes the logic to correctly identify pointer-type casts

Comment threadsrc/coreclr/jit/lclmorph.cpp Outdated
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
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cc @dotnet/jit-contrib PTAL @EgorBo

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/azp run runtime-coreclr superpmi-diffs

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Azure Pipelines successfully started running 1 pipeline(s).

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Had to push another commit to check for TYP_U_IMPL as well.

@jakobbotsch
jakobbotsch merged commit c58b659 into dotnet:mainJul 25, 2025
110 checks passed
@jakobbotsch
jakobbotsch deleted the fix-118006 branch July 25, 2025 17:43
@github-actionsgithub-actionsBot locked and limited conversation to collaborators Aug 25, 2025
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Successfully merging this pull request may close these issues.

Test failure: JIT/IL_Conformance/Old/directed/ldloca_s_i1/ldloca_s_i1.dll

3 participants

@jakobbotsch@EgorBo