Arm64: Fix loads and stores for stack allocated vectors and masks - #128037

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jakobbotsch merged 3 commits into
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snickolls-arm:fix-ldr-str-codegen
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Arm64: Fix loads and stores for stack allocated vectors and masks#128037
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snickolls-arm:fix-ldr-str-codegen

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Code introduced in #125491 asserts that addressing is always frame pointer based, but it is possible for it to be stack pointer based. Remove the assertion and select the correct register for codegen.

Fixes#127955

@snickolls-arm
Arm64: Fix loads and stores for stack allocated vectors and masks
3504b81
Code introduced in dotnet#125491 asserts that addressing is always frame
pointer based, but it is possible for it to be stack pointer based.
Remove the assertion and select the correct register for codegen.
Fixesdotnet#127955
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Comment threadsrc/coreclr/jit/emitarm64.cpp
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[ci-scan] Test failure: JIT assertion 'FPbased' in SVE2 HardwareIntrinsics under jitstress on arm64

2 participants

@snickolls-arm@jakobbotsch
, '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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Arm64: Fix loads and stores for stack allocated vectors and masks - #128037
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jakobbotsch merged 3 commits into
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snickolls-arm:fix-ldr-str-codegen
May 12, 2026
Merged
Arm64: Fix loads and stores for stack allocated vectors and masks#128037
jakobbotsch merged 3 commits into
dotnet:mainfrom 
snickolls-arm:fix-ldr-str-codegen
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Code introduced in #125491 asserts that addressing is always frame pointer based, but it is possible for it to be stack pointer based. Remove the assertion and select the correct register for codegen.
Fixes#127955
@snickolls-arm
Arm64: Fix loads and stores for stack allocated vectors and masks
3504b81
Code introduced in dotnet#125491 asserts that addressing is always frame
pointer based, but it is possible for it to be stack pointer based.
Remove the assertion and select the correct register for codegen.
Fixesdotnet#127955
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[ci-scan] Test failure: JIT assertion 'FPbased' in SVE2 HardwareIntrinsics under jitstress on arm64


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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('^' + ".*" + '

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Arm64: Fix loads and stores for stack allocated vectors and masks - #128037
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snickolls-arm:fix-ldr-str-codegen
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Arm64: Fix loads and stores for stack allocated vectors and masks#128037
jakobbotsch merged 3 commits into
dotnet:mainfrom 
snickolls-arm:fix-ldr-str-codegen
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@snickolls-armsnickolls-arm
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Code introduced in #125491 asserts that addressing is always frame pointer based, but it is possible for it to be stack pointer based. Remove the assertion and select the correct register for codegen.
Fixes#127955
@snickolls-arm
Arm64: Fix loads and stores for stack allocated vectors and masks
3504b81
Code introduced in dotnet#125491 asserts that addressing is always frame
pointer based, but it is possible for it to be stack pointer based.
Remove the assertion and select the correct register for codegen.
Fixesdotnet#127955
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Comment threadsrc/coreclr/jit/emitarm64.cpp
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[ci-scan] Test failure: JIT assertion 'FPbased' in SVE2 HardwareIntrinsics under jitstress on arm64


2 participants

@snickolls-arm@jakobbotsch

, '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
Arm64: Fix loads and stores for stack allocated vectors and masks - #128037
Merged
jakobbotsch merged 3 commits into
dotnet:mainfrom 
snickolls-arm:fix-ldr-str-codegen
May 12, 2026
Merged
Arm64: Fix loads and stores for stack allocated vectors and masks#128037
jakobbotsch merged 3 commits into
dotnet:mainfrom 
snickolls-arm:fix-ldr-str-codegen
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@snickolls-arm
@snickolls-armsnickolls-arm
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May 11, 2026

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Code introduced in #125491 asserts that addressing is always frame pointer based, but it is possible for it to be stack pointer based. Remove the assertion and select the correct register for codegen.
Fixes#127955
@snickolls-arm
Arm64: Fix loads and stores for stack allocated vectors and masks
3504b81
Code introduced in dotnet#125491 asserts that addressing is always frame
pointer based, but it is possible for it to be stack pointer based.
Remove the assertion and select the correct register for codegen.
Fixesdotnet#127955
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Comment threadsrc/coreclr/jit/emitarm64.cpp
@jakobbotsch
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merged commit 06c1222
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dotnet:mainMay 12, 2026

132 of 138 checks passed

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[ci-scan] Test failure: JIT assertion 'FPbased' in SVE2 HardwareIntrinsics under jitstress on arm64


2 participants

@snickolls-arm@jakobbotsch

, '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
Arm64: Fix loads and stores for stack allocated vectors and masks - #128037
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jakobbotsch merged 3 commits into
dotnet:mainfrom 
snickolls-arm:fix-ldr-str-codegen
May 12, 2026
Merged
Arm64: Fix loads and stores for stack allocated vectors and masks#128037
jakobbotsch merged 3 commits into
dotnet:mainfrom 
snickolls-arm:fix-ldr-str-codegen
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@snickolls-armsnickolls-arm
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Code introduced in #125491 asserts that addressing is always frame pointer based, but it is possible for it to be stack pointer based. Remove the assertion and select the correct register for codegen.
Fixes#127955
@snickolls-arm
Arm64: Fix loads and stores for stack allocated vectors and masks
3504b81
Code introduced in dotnet#125491 asserts that addressing is always frame
pointer based, but it is possible for it to be stack pointer based.
Remove the assertion and select the correct register for codegen.
Fixesdotnet#127955
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Comment threadsrc/coreclr/jit/emitarm64.cpp
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[ci-scan] Test failure: JIT assertion 'FPbased' in SVE2 HardwareIntrinsics under jitstress on arm64


2 participants

@snickolls-arm@jakobbotsch

, '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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Arm64: Fix loads and stores for stack allocated vectors and masks - #128037
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jakobbotsch merged 3 commits into
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snickolls-arm:fix-ldr-str-codegen
May 12, 2026
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Arm64: Fix loads and stores for stack allocated vectors and masks#128037
jakobbotsch merged 3 commits into
dotnet:mainfrom 
snickolls-arm:fix-ldr-str-codegen
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Code introduced in #125491 asserts that addressing is always frame pointer based, but it is possible for it to be stack pointer based. Remove the assertion and select the correct register for codegen.
Fixes#127955
@snickolls-arm
Arm64: Fix loads and stores for stack allocated vectors and masks
3504b81
Code introduced in dotnet#125491 asserts that addressing is always frame
pointer based, but it is possible for it to be stack pointer based.
Remove the assertion and select the correct register for codegen.
Fixesdotnet#127955
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Comment threadsrc/coreclr/jit/emitarm64.cpp
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132 of 138 checks passed

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[ci-scan] Test failure: JIT assertion 'FPbased' in SVE2 HardwareIntrinsics under jitstress on arm64


2 participants

@snickolls-arm@jakobbotsch

, '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('^' + ".*" + '

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Arm64: Fix loads and stores for stack allocated vectors and masks - #128037
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snickolls-arm:fix-ldr-str-codegen
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Arm64: Fix loads and stores for stack allocated vectors and masks#128037
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snickolls-arm:fix-ldr-str-codegen
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Code introduced in #125491 asserts that addressing is always frame pointer based, but it is possible for it to be stack pointer based. Remove the assertion and select the correct register for codegen.
Fixes#127955
@snickolls-arm
Arm64: Fix loads and stores for stack allocated vectors and masks
3504b81
Code introduced in dotnet#125491 asserts that addressing is always frame
pointer based, but it is possible for it to be stack pointer based.
Remove the assertion and select the correct register for codegen.
Fixesdotnet#127955
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[ci-scan] Test failure: JIT assertion 'FPbased' in SVE2 HardwareIntrinsics under jitstress on arm64


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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); }
})();
})();

Skip to content
Arm64: Fix loads and stores for stack allocated vectors and masks - #128037
Merged
jakobbotsch merged 3 commits into
dotnet:mainfrom 
snickolls-arm:fix-ldr-str-codegen
May 12, 2026
Merged
Arm64: Fix loads and stores for stack allocated vectors and masks#128037
jakobbotsch merged 3 commits into
dotnet:mainfrom 
snickolls-arm:fix-ldr-str-codegen
Conversation
@snickolls-arm
@snickolls-armsnickolls-arm
commented
May 11, 2026

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Code introduced in #125491 asserts that addressing is always frame pointer based, but it is possible for it to be stack pointer based. Remove the assertion and select the correct register for codegen.
Fixes#127955
@snickolls-arm
Arm64: Fix loads and stores for stack allocated vectors and masks
3504b81
Code introduced in dotnet#125491 asserts that addressing is always frame
pointer based, but it is possible for it to be stack pointer based.
Remove the assertion and select the correct register for codegen.
Fixesdotnet#127955
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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch

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Comment threadsrc/coreclr/jit/emitarm64.cpp
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merged commit 06c1222
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132 of 138 checks passed

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Successfully merging this pull request may close these issues.

[ci-scan] Test failure: JIT assertion 'FPbased' in SVE2 HardwareIntrinsics under jitstress on arm64


2 participants

@snickolls-arm@jakobbotsch