JIT: fix RBO constant relop truth evaluation under opt-repeat#129487

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JIT: fix RBO constant relop truth evaluation under opt-repeat #129487

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4 changes: 2 additions & 2 deletions src/coreclr/jit/redundantbranchopts.cpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -1187,7 +1187,7 @@ bool Compiler::optRedundantBranch(BasicBlock* const block)
//
if (vnStore->IsVNConstant(treeNormVN))
{
relopValue = (treeNormVN == vnStore->VNZeroForType(TYP_INT)) ? 0 : 1;
relopValue = (treeNormVN == vnStore->VNZeroForType(vnStore->TypeOfVN(treeNormVN))) ? 0 : 1;
JITDUMP("Relop [%06u] " FMT_BB " has known value %s\n ", dspTreeID(tree), block->bbNum,
relopValue == 0 ? "false" : "true");
}
Expand DownExpand Up@@ -2389,7 +2389,7 @@ bool Compiler::optJumpThreadPhi(BasicBlock* block, GenTree* tree, ValueNum treeN
//
if (vnStore->IsVNConstant(substVN))
{
const bool relopIsTrue = (substVN != vnStore->VNZeroForType(TYP_INT));
const bool relopIsTrue = (substVN != vnStore->VNZeroForType(vnStore->TypeOfVN(substVN)));
JITDUMP("... substituted VN implies relop is %d when coming from pred " FMT_BB "\n", relopIsTrue,
predBlock->bbNum);

Expand Down
128 changes: 128 additions & 0 deletions src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.cs
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@@ -0,0 +1,128 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using Xunit;

public class Runtime_129386
{
private static volatile uint s_inputP0 = 0u;
private static volatile uint s_inputP1 = 0xFFFFFFFFu;
private static int[] s_trace = new int[64];
private static int s_traceLen = 0;

[MethodImpl(MethodImplOptions.NoInlining)]
private static uint Fn30000002142(uint p0, uint p1)
{
unchecked
{
uint v1 = 0, v3 = 0, v4 = 0, v5 = 0, v7 = 0, v11 = 0, v13 = 0, v14 = 0, v19 = 0,
v22 = 0, v23 = 0, v24 = 0, v25 = 0, v33 = 0, v35 = 0, v39 = 0, v42 = 0,
v50 = 0, v51 = 0, v58 = 0, v61 = 0, v63 = 0, v66 = 0, v67 = 0, v68 = 0,
v69 = 0, v71 = 0, v72 = 0, v73 = 0, v74 = 0, v75 = 0, v78 = 0, v80 = 0,
v82 = 0, v83 = 0, v84 = 0, v85 = 0, v86 = 0, v87 = 0, v88 = 0, v93 = 0,
v119 = 0, v120 = 0, v121 = 0, v123 = 0, v124 = 0;
int v6 = 0, v10 = 0, v17 = 0, v21 = 0, v26 = 0, v70 = 0, v76 = 0, v77 = 0,
v79 = 0, v81 = 0, v118 = 0, v122 = 0;

b0:
v6 = (0u < p0) ? 1 : 0;
if (v6 != 0) goto b1;
goto b3;
b1:
v10 = BitOperations.IsPow2(v7) ? 1 : 0;
v11 = (uint)v10;
v14 = v13 - 0x000D3403u;
v17 = (v14 > v4) ? 1 : 0;
if (v17 != 0) goto b2;
goto b10;
b2:
s_trace[s_traceLen++] = 2;
v19 = v5 % p0;
v21 = (p0 <= v11) ? 1 : 0;
if (v21 != 0) goto b10;
goto b11;
b3:
v22 = v14 - 0x000CBA13u;
v23 = v11 | 0xFFFC3D1Au;
v24 = v4 & v22;
v25 = 0u & v1;
v26 = (v24 > p0) ? 1 : 0;
if (v26 != 0) goto b10;
goto b12;
b10:
s_trace[s_traceLen++] = 10;
v66 = v51 >>> (int)v61;
v67 = v58 - 0x0004A8B9u;
v68 = Math.Max(0xFFFA3E09u, 0xFFFFFFFDu);
v69 = v33 - v50;
v70 = BitOperations.PopCount(0xFFFBC8AAu);
v71 = (uint)v70;
v72 = v4 | 0x00004D11u;
goto b19;
b11:
s_trace[s_traceLen++] = 11;
v73 = v51 + 0x000003E8u;
v74 = BitOperations.RotateRight(v39, (int)v42);
v75 = 0xFFFAF3CAu + v58;
v76 = (v68 == v19) ? 1 : 0;
if (v76 != 0) goto b13;
goto b0;
b12:
s_trace[s_traceLen++] = 12;
v77 = (v4 < v23) ? 1 : 0;
v78 = (uint)v77;
v79 = (v35 <= 0x000B9492u) ? 1 : 0;
v80 = (uint)v79;
v81 = BitOperations.TrailingZeroCount(0xFFFFFFFFu);
v82 = (uint)v81;
return v82;
b13:
s_trace[s_traceLen++] = 13;
v83 = ~v23;
v84 = v25 + v1;
v85 = Math.Max(0x80000000u, p1);
v86 = 0xFFFF5264u % v84;
v87 = p0 & 0xFFFFFFF9u;
v88 = ~p0;
goto b2;
b19:
s_trace[s_traceLen++] = 19;
v118 = (v83 <= 0x000BF458u) ? 1 : 0;
v119 = (uint)v118;
v120 = 0x0000001Fu * v93;
v121 = ~v75;
v122 = BitOperations.Log2(v24);
v123 = (uint)v122;
v124 = v63 + v3;
return v124;
}
}

[Fact]
public static int TestEntryPoint()
{
try
{
s_traceLen = 0;
uint result = Fn30000002142(s_inputP0, s_inputP1);
if (result != 0)
{
return 101;
}

if ((s_traceLen != 1) || (s_trace[0] != 12))
{
return 102;
}

return 100;
}
catch (DivideByZeroException)
{
return 103;
}
}
}
14 changes: 14 additions & 0 deletions src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.csproj
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Open in desktop
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<!-- Needed for CLRTestEnvironmentVariable -->
<RequiresProcessIsolation>true</RequiresProcessIsolation>
<Optimize>True</Optimize>
</PropertyGroup>
<ItemGroup>
<Compile Include="$(MSBuildProjectName).cs" />

<CLRTestEnvironmentVariable Include="DOTNET_JitEnableOptRepeat" Value="1" />
<CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeat" Value="Fn30000002142" />
<CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeatCount" Value="2" />
</ItemGroup>
</Project>
Loading
, '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 RBO constant relop truth evaluation under opt-repeat#129487

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JIT: fix RBO constant relop truth evaluation under opt-repeat
#129487
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4 changes: 2 additions & 2 deletions
src/coreclr/jit/redundantbranchopts.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1187,7 +1187,7 @@ bool Compiler::optRedundantBranch(BasicBlock* const block)
 //
 if (vnStore->IsVNConstant(treeNormVN))
 {
 relopValue = (treeNormVN == vnStore->VNZeroForType(TYP_INT)) ? 0 : 1;
 relopValue = (treeNormVN == vnStore->VNZeroForType(vnStore->TypeOfVN(treeNormVN))) ? 0 : 1;
 JITDUMP("Relop [%06u] " FMT_BB " has known value %s\n ", dspTreeID(tree), block->bbNum,
 relopValue == 0 ? "false" : "true");
 }
Expand DownExpand Up@@ -2389,7 +2389,7 @@ bool Compiler::optJumpThreadPhi(BasicBlock* block, GenTree* tree, ValueNum treeN
 //
 if (vnStore->IsVNConstant(substVN))
 {
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(TYP_INT));
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(vnStore->TypeOfVN(substVN)));
 JITDUMP("... substituted VN implies relop is %d when coming from pred " FMT_BB "\n", relopIsTrue,
 predBlock->bbNum);

Expand Down

128 changes: 128 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.cs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,128 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using Xunit;

public class Runtime_129386
{
 private static volatile uint s_inputP0 = 0u;
 private static volatile uint s_inputP1 = 0xFFFFFFFFu;
 private static int[] s_trace = new int[64];
 private static int s_traceLen = 0;

 [MethodImpl(MethodImplOptions.NoInlining)]
 private static uint Fn30000002142(uint p0, uint p1)
 {
 unchecked
 {
 uint v1 = 0, v3 = 0, v4 = 0, v5 = 0, v7 = 0, v11 = 0, v13 = 0, v14 = 0, v19 = 0,
 v22 = 0, v23 = 0, v24 = 0, v25 = 0, v33 = 0, v35 = 0, v39 = 0, v42 = 0,
 v50 = 0, v51 = 0, v58 = 0, v61 = 0, v63 = 0, v66 = 0, v67 = 0, v68 = 0,
 v69 = 0, v71 = 0, v72 = 0, v73 = 0, v74 = 0, v75 = 0, v78 = 0, v80 = 0,
 v82 = 0, v83 = 0, v84 = 0, v85 = 0, v86 = 0, v87 = 0, v88 = 0, v93 = 0,
 v119 = 0, v120 = 0, v121 = 0, v123 = 0, v124 = 0;
 int v6 = 0, v10 = 0, v17 = 0, v21 = 0, v26 = 0, v70 = 0, v76 = 0, v77 = 0,
 v79 = 0, v81 = 0, v118 = 0, v122 = 0;

 b0:
 v6 = (0u < p0) ? 1 : 0;
 if (v6 != 0) goto b1;
 goto b3;
 b1:
 v10 = BitOperations.IsPow2(v7) ? 1 : 0;
 v11 = (uint)v10;
 v14 = v13 - 0x000D3403u;
 v17 = (v14 > v4) ? 1 : 0;
 if (v17 != 0) goto b2;
 goto b10;
 b2:
 s_trace[s_traceLen++] = 2;
 v19 = v5 % p0;
 v21 = (p0 <= v11) ? 1 : 0;
 if (v21 != 0) goto b10;
 goto b11;
 b3:
 v22 = v14 - 0x000CBA13u;
 v23 = v11 | 0xFFFC3D1Au;
 v24 = v4 & v22;
 v25 = 0u & v1;
 v26 = (v24 > p0) ? 1 : 0;
 if (v26 != 0) goto b10;
 goto b12;
 b10:
 s_trace[s_traceLen++] = 10;
 v66 = v51 >>> (int)v61;
 v67 = v58 - 0x0004A8B9u;
 v68 = Math.Max(0xFFFA3E09u, 0xFFFFFFFDu);
 v69 = v33 - v50;
 v70 = BitOperations.PopCount(0xFFFBC8AAu);
 v71 = (uint)v70;
 v72 = v4 | 0x00004D11u;
 goto b19;
 b11:
 s_trace[s_traceLen++] = 11;
 v73 = v51 + 0x000003E8u;
 v74 = BitOperations.RotateRight(v39, (int)v42);
 v75 = 0xFFFAF3CAu + v58;
 v76 = (v68 == v19) ? 1 : 0;
 if (v76 != 0) goto b13;
 goto b0;
 b12:
 s_trace[s_traceLen++] = 12;
 v77 = (v4 < v23) ? 1 : 0;
 v78 = (uint)v77;
 v79 = (v35 <= 0x000B9492u) ? 1 : 0;
 v80 = (uint)v79;
 v81 = BitOperations.TrailingZeroCount(0xFFFFFFFFu);
 v82 = (uint)v81;
 return v82;
 b13:
 s_trace[s_traceLen++] = 13;
 v83 = ~v23;
 v84 = v25 + v1;
 v85 = Math.Max(0x80000000u, p1);
 v86 = 0xFFFF5264u % v84;
 v87 = p0 & 0xFFFFFFF9u;
 v88 = ~p0;
 goto b2;
 b19:
 s_trace[s_traceLen++] = 19;
 v118 = (v83 <= 0x000BF458u) ? 1 : 0;
 v119 = (uint)v118;
 v120 = 0x0000001Fu * v93;
 v121 = ~v75;
 v122 = BitOperations.Log2(v24);
 v123 = (uint)v122;
 v124 = v63 + v3;
 return v124;
 }
 }

 [Fact]
 public static int TestEntryPoint()
 {
 try
 {
 s_traceLen = 0;
 uint result = Fn30000002142(s_inputP0, s_inputP1);
 if (result != 0)
 {
 return 101;
 }

 if ((s_traceLen != 1) || (s_trace[0] != 12))
 {
 return 102;
 }

 return 100;
 }
 catch (DivideByZeroException)
 {
 return 103;
 }
 }
}

14 changes: 14 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.csproj

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
<Project Sdk="Microsoft.NET.Sdk">
 <PropertyGroup>
 <!-- Needed for CLRTestEnvironmentVariable -->
 <RequiresProcessIsolation>true</RequiresProcessIsolation>
 <Optimize>True</Optimize>
 </PropertyGroup>
 <ItemGroup>
 <Compile Include="$(MSBuildProjectName).cs" />

 <CLRTestEnvironmentVariable Include="DOTNET_JitEnableOptRepeat" Value="1" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeat" Value="Fn30000002142" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeatCount" Value="2" />
 </ItemGroup>
</Project>
Loading

, '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 RBO constant relop truth evaluation under opt-repeat#129487

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JIT: fix RBO constant relop truth evaluation under opt-repeat
#129487
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8706a52

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d21dca3

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Copilot Jun 17, 2026

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4 changes: 2 additions & 2 deletions
src/coreclr/jit/redundantbranchopts.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1187,7 +1187,7 @@ bool Compiler::optRedundantBranch(BasicBlock* const block)
 //
 if (vnStore->IsVNConstant(treeNormVN))
 {
 relopValue = (treeNormVN == vnStore->VNZeroForType(TYP_INT)) ? 0 : 1;
 relopValue = (treeNormVN == vnStore->VNZeroForType(vnStore->TypeOfVN(treeNormVN))) ? 0 : 1;
 JITDUMP("Relop [%06u] " FMT_BB " has known value %s\n ", dspTreeID(tree), block->bbNum,
 relopValue == 0 ? "false" : "true");
 }
Expand DownExpand Up@@ -2389,7 +2389,7 @@ bool Compiler::optJumpThreadPhi(BasicBlock* block, GenTree* tree, ValueNum treeN
 //
 if (vnStore->IsVNConstant(substVN))
 {
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(TYP_INT));
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(vnStore->TypeOfVN(substVN)));
 JITDUMP("... substituted VN implies relop is %d when coming from pred " FMT_BB "\n", relopIsTrue,
 predBlock->bbNum);

Expand Down

128 changes: 128 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.cs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,128 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using Xunit;

public class Runtime_129386
{
 private static volatile uint s_inputP0 = 0u;
 private static volatile uint s_inputP1 = 0xFFFFFFFFu;
 private static int[] s_trace = new int[64];
 private static int s_traceLen = 0;

 [MethodImpl(MethodImplOptions.NoInlining)]
 private static uint Fn30000002142(uint p0, uint p1)
 {
 unchecked
 {
 uint v1 = 0, v3 = 0, v4 = 0, v5 = 0, v7 = 0, v11 = 0, v13 = 0, v14 = 0, v19 = 0,
 v22 = 0, v23 = 0, v24 = 0, v25 = 0, v33 = 0, v35 = 0, v39 = 0, v42 = 0,
 v50 = 0, v51 = 0, v58 = 0, v61 = 0, v63 = 0, v66 = 0, v67 = 0, v68 = 0,
 v69 = 0, v71 = 0, v72 = 0, v73 = 0, v74 = 0, v75 = 0, v78 = 0, v80 = 0,
 v82 = 0, v83 = 0, v84 = 0, v85 = 0, v86 = 0, v87 = 0, v88 = 0, v93 = 0,
 v119 = 0, v120 = 0, v121 = 0, v123 = 0, v124 = 0;
 int v6 = 0, v10 = 0, v17 = 0, v21 = 0, v26 = 0, v70 = 0, v76 = 0, v77 = 0,
 v79 = 0, v81 = 0, v118 = 0, v122 = 0;

 b0:
 v6 = (0u < p0) ? 1 : 0;
 if (v6 != 0) goto b1;
 goto b3;
 b1:
 v10 = BitOperations.IsPow2(v7) ? 1 : 0;
 v11 = (uint)v10;
 v14 = v13 - 0x000D3403u;
 v17 = (v14 > v4) ? 1 : 0;
 if (v17 != 0) goto b2;
 goto b10;
 b2:
 s_trace[s_traceLen++] = 2;
 v19 = v5 % p0;
 v21 = (p0 <= v11) ? 1 : 0;
 if (v21 != 0) goto b10;
 goto b11;
 b3:
 v22 = v14 - 0x000CBA13u;
 v23 = v11 | 0xFFFC3D1Au;
 v24 = v4 & v22;
 v25 = 0u & v1;
 v26 = (v24 > p0) ? 1 : 0;
 if (v26 != 0) goto b10;
 goto b12;
 b10:
 s_trace[s_traceLen++] = 10;
 v66 = v51 >>> (int)v61;
 v67 = v58 - 0x0004A8B9u;
 v68 = Math.Max(0xFFFA3E09u, 0xFFFFFFFDu);
 v69 = v33 - v50;
 v70 = BitOperations.PopCount(0xFFFBC8AAu);
 v71 = (uint)v70;
 v72 = v4 | 0x00004D11u;
 goto b19;
 b11:
 s_trace[s_traceLen++] = 11;
 v73 = v51 + 0x000003E8u;
 v74 = BitOperations.RotateRight(v39, (int)v42);
 v75 = 0xFFFAF3CAu + v58;
 v76 = (v68 == v19) ? 1 : 0;
 if (v76 != 0) goto b13;
 goto b0;
 b12:
 s_trace[s_traceLen++] = 12;
 v77 = (v4 < v23) ? 1 : 0;
 v78 = (uint)v77;
 v79 = (v35 <= 0x000B9492u) ? 1 : 0;
 v80 = (uint)v79;
 v81 = BitOperations.TrailingZeroCount(0xFFFFFFFFu);
 v82 = (uint)v81;
 return v82;
 b13:
 s_trace[s_traceLen++] = 13;
 v83 = ~v23;
 v84 = v25 + v1;
 v85 = Math.Max(0x80000000u, p1);
 v86 = 0xFFFF5264u % v84;
 v87 = p0 & 0xFFFFFFF9u;
 v88 = ~p0;
 goto b2;
 b19:
 s_trace[s_traceLen++] = 19;
 v118 = (v83 <= 0x000BF458u) ? 1 : 0;
 v119 = (uint)v118;
 v120 = 0x0000001Fu * v93;
 v121 = ~v75;
 v122 = BitOperations.Log2(v24);
 v123 = (uint)v122;
 v124 = v63 + v3;
 return v124;
 }
 }

 [Fact]
 public static int TestEntryPoint()
 {
 try
 {
 s_traceLen = 0;
 uint result = Fn30000002142(s_inputP0, s_inputP1);
 if (result != 0)
 {
 return 101;
 }

 if ((s_traceLen != 1) || (s_trace[0] != 12))
 {
 return 102;
 }

 return 100;
 }
 catch (DivideByZeroException)
 {
 return 103;
 }
 }
}

14 changes: 14 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.csproj

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
<Project Sdk="Microsoft.NET.Sdk">
 <PropertyGroup>
 <!-- Needed for CLRTestEnvironmentVariable -->
 <RequiresProcessIsolation>true</RequiresProcessIsolation>
 <Optimize>True</Optimize>
 </PropertyGroup>
 <ItemGroup>
 <Compile Include="$(MSBuildProjectName).cs" />

 <CLRTestEnvironmentVariable Include="DOTNET_JitEnableOptRepeat" Value="1" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeat" Value="Fn30000002142" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeatCount" Value="2" />
 </ItemGroup>
</Project>
Loading

, '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 RBO constant relop truth evaluation under opt-repeat#129487

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JIT: fix RBO constant relop truth evaluation under opt-repeat
#129487
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4 changes: 2 additions & 2 deletions
src/coreclr/jit/redundantbranchopts.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1187,7 +1187,7 @@ bool Compiler::optRedundantBranch(BasicBlock* const block)
 //
 if (vnStore->IsVNConstant(treeNormVN))
 {
 relopValue = (treeNormVN == vnStore->VNZeroForType(TYP_INT)) ? 0 : 1;
 relopValue = (treeNormVN == vnStore->VNZeroForType(vnStore->TypeOfVN(treeNormVN))) ? 0 : 1;
 JITDUMP("Relop [%06u] " FMT_BB " has known value %s\n ", dspTreeID(tree), block->bbNum,
 relopValue == 0 ? "false" : "true");
 }
Expand DownExpand Up@@ -2389,7 +2389,7 @@ bool Compiler::optJumpThreadPhi(BasicBlock* block, GenTree* tree, ValueNum treeN
 //
 if (vnStore->IsVNConstant(substVN))
 {
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(TYP_INT));
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(vnStore->TypeOfVN(substVN)));
 JITDUMP("... substituted VN implies relop is %d when coming from pred " FMT_BB "\n", relopIsTrue,
 predBlock->bbNum);

Expand Down

128 changes: 128 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.cs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,128 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using Xunit;

public class Runtime_129386
{
 private static volatile uint s_inputP0 = 0u;
 private static volatile uint s_inputP1 = 0xFFFFFFFFu;
 private static int[] s_trace = new int[64];
 private static int s_traceLen = 0;

 [MethodImpl(MethodImplOptions.NoInlining)]
 private static uint Fn30000002142(uint p0, uint p1)
 {
 unchecked
 {
 uint v1 = 0, v3 = 0, v4 = 0, v5 = 0, v7 = 0, v11 = 0, v13 = 0, v14 = 0, v19 = 0,
 v22 = 0, v23 = 0, v24 = 0, v25 = 0, v33 = 0, v35 = 0, v39 = 0, v42 = 0,
 v50 = 0, v51 = 0, v58 = 0, v61 = 0, v63 = 0, v66 = 0, v67 = 0, v68 = 0,
 v69 = 0, v71 = 0, v72 = 0, v73 = 0, v74 = 0, v75 = 0, v78 = 0, v80 = 0,
 v82 = 0, v83 = 0, v84 = 0, v85 = 0, v86 = 0, v87 = 0, v88 = 0, v93 = 0,
 v119 = 0, v120 = 0, v121 = 0, v123 = 0, v124 = 0;
 int v6 = 0, v10 = 0, v17 = 0, v21 = 0, v26 = 0, v70 = 0, v76 = 0, v77 = 0,
 v79 = 0, v81 = 0, v118 = 0, v122 = 0;

 b0:
 v6 = (0u < p0) ? 1 : 0;
 if (v6 != 0) goto b1;
 goto b3;
 b1:
 v10 = BitOperations.IsPow2(v7) ? 1 : 0;
 v11 = (uint)v10;
 v14 = v13 - 0x000D3403u;
 v17 = (v14 > v4) ? 1 : 0;
 if (v17 != 0) goto b2;
 goto b10;
 b2:
 s_trace[s_traceLen++] = 2;
 v19 = v5 % p0;
 v21 = (p0 <= v11) ? 1 : 0;
 if (v21 != 0) goto b10;
 goto b11;
 b3:
 v22 = v14 - 0x000CBA13u;
 v23 = v11 | 0xFFFC3D1Au;
 v24 = v4 & v22;
 v25 = 0u & v1;
 v26 = (v24 > p0) ? 1 : 0;
 if (v26 != 0) goto b10;
 goto b12;
 b10:
 s_trace[s_traceLen++] = 10;
 v66 = v51 >>> (int)v61;
 v67 = v58 - 0x0004A8B9u;
 v68 = Math.Max(0xFFFA3E09u, 0xFFFFFFFDu);
 v69 = v33 - v50;
 v70 = BitOperations.PopCount(0xFFFBC8AAu);
 v71 = (uint)v70;
 v72 = v4 | 0x00004D11u;
 goto b19;
 b11:
 s_trace[s_traceLen++] = 11;
 v73 = v51 + 0x000003E8u;
 v74 = BitOperations.RotateRight(v39, (int)v42);
 v75 = 0xFFFAF3CAu + v58;
 v76 = (v68 == v19) ? 1 : 0;
 if (v76 != 0) goto b13;
 goto b0;
 b12:
 s_trace[s_traceLen++] = 12;
 v77 = (v4 < v23) ? 1 : 0;
 v78 = (uint)v77;
 v79 = (v35 <= 0x000B9492u) ? 1 : 0;
 v80 = (uint)v79;
 v81 = BitOperations.TrailingZeroCount(0xFFFFFFFFu);
 v82 = (uint)v81;
 return v82;
 b13:
 s_trace[s_traceLen++] = 13;
 v83 = ~v23;
 v84 = v25 + v1;
 v85 = Math.Max(0x80000000u, p1);
 v86 = 0xFFFF5264u % v84;
 v87 = p0 & 0xFFFFFFF9u;
 v88 = ~p0;
 goto b2;
 b19:
 s_trace[s_traceLen++] = 19;
 v118 = (v83 <= 0x000BF458u) ? 1 : 0;
 v119 = (uint)v118;
 v120 = 0x0000001Fu * v93;
 v121 = ~v75;
 v122 = BitOperations.Log2(v24);
 v123 = (uint)v122;
 v124 = v63 + v3;
 return v124;
 }
 }

 [Fact]
 public static int TestEntryPoint()
 {
 try
 {
 s_traceLen = 0;
 uint result = Fn30000002142(s_inputP0, s_inputP1);
 if (result != 0)
 {
 return 101;
 }

 if ((s_traceLen != 1) || (s_trace[0] != 12))
 {
 return 102;
 }

 return 100;
 }
 catch (DivideByZeroException)
 {
 return 103;
 }
 }
}

14 changes: 14 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.csproj

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
<Project Sdk="Microsoft.NET.Sdk">
 <PropertyGroup>
 <!-- Needed for CLRTestEnvironmentVariable -->
 <RequiresProcessIsolation>true</RequiresProcessIsolation>
 <Optimize>True</Optimize>
 </PropertyGroup>
 <ItemGroup>
 <Compile Include="$(MSBuildProjectName).cs" />

 <CLRTestEnvironmentVariable Include="DOTNET_JitEnableOptRepeat" Value="1" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeat" Value="Fn30000002142" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeatCount" Value="2" />
 </ItemGroup>
</Project>
Loading

, '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 RBO constant relop truth evaluation under opt-repeat#129487

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JIT: fix RBO constant relop truth evaluation under opt-repeat
#129487
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8706a52

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d21dca3

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Copilot Jun 17, 2026

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4 changes: 2 additions & 2 deletions
src/coreclr/jit/redundantbranchopts.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1187,7 +1187,7 @@ bool Compiler::optRedundantBranch(BasicBlock* const block)
 //
 if (vnStore->IsVNConstant(treeNormVN))
 {
 relopValue = (treeNormVN == vnStore->VNZeroForType(TYP_INT)) ? 0 : 1;
 relopValue = (treeNormVN == vnStore->VNZeroForType(vnStore->TypeOfVN(treeNormVN))) ? 0 : 1;
 JITDUMP("Relop [%06u] " FMT_BB " has known value %s\n ", dspTreeID(tree), block->bbNum,
 relopValue == 0 ? "false" : "true");
 }
Expand DownExpand Up@@ -2389,7 +2389,7 @@ bool Compiler::optJumpThreadPhi(BasicBlock* block, GenTree* tree, ValueNum treeN
 //
 if (vnStore->IsVNConstant(substVN))
 {
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(TYP_INT));
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(vnStore->TypeOfVN(substVN)));
 JITDUMP("... substituted VN implies relop is %d when coming from pred " FMT_BB "\n", relopIsTrue,
 predBlock->bbNum);

Expand Down

128 changes: 128 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.cs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,128 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using Xunit;

public class Runtime_129386
{
 private static volatile uint s_inputP0 = 0u;
 private static volatile uint s_inputP1 = 0xFFFFFFFFu;
 private static int[] s_trace = new int[64];
 private static int s_traceLen = 0;

 [MethodImpl(MethodImplOptions.NoInlining)]
 private static uint Fn30000002142(uint p0, uint p1)
 {
 unchecked
 {
 uint v1 = 0, v3 = 0, v4 = 0, v5 = 0, v7 = 0, v11 = 0, v13 = 0, v14 = 0, v19 = 0,
 v22 = 0, v23 = 0, v24 = 0, v25 = 0, v33 = 0, v35 = 0, v39 = 0, v42 = 0,
 v50 = 0, v51 = 0, v58 = 0, v61 = 0, v63 = 0, v66 = 0, v67 = 0, v68 = 0,
 v69 = 0, v71 = 0, v72 = 0, v73 = 0, v74 = 0, v75 = 0, v78 = 0, v80 = 0,
 v82 = 0, v83 = 0, v84 = 0, v85 = 0, v86 = 0, v87 = 0, v88 = 0, v93 = 0,
 v119 = 0, v120 = 0, v121 = 0, v123 = 0, v124 = 0;
 int v6 = 0, v10 = 0, v17 = 0, v21 = 0, v26 = 0, v70 = 0, v76 = 0, v77 = 0,
 v79 = 0, v81 = 0, v118 = 0, v122 = 0;

 b0:
 v6 = (0u < p0) ? 1 : 0;
 if (v6 != 0) goto b1;
 goto b3;
 b1:
 v10 = BitOperations.IsPow2(v7) ? 1 : 0;
 v11 = (uint)v10;
 v14 = v13 - 0x000D3403u;
 v17 = (v14 > v4) ? 1 : 0;
 if (v17 != 0) goto b2;
 goto b10;
 b2:
 s_trace[s_traceLen++] = 2;
 v19 = v5 % p0;
 v21 = (p0 <= v11) ? 1 : 0;
 if (v21 != 0) goto b10;
 goto b11;
 b3:
 v22 = v14 - 0x000CBA13u;
 v23 = v11 | 0xFFFC3D1Au;
 v24 = v4 & v22;
 v25 = 0u & v1;
 v26 = (v24 > p0) ? 1 : 0;
 if (v26 != 0) goto b10;
 goto b12;
 b10:
 s_trace[s_traceLen++] = 10;
 v66 = v51 >>> (int)v61;
 v67 = v58 - 0x0004A8B9u;
 v68 = Math.Max(0xFFFA3E09u, 0xFFFFFFFDu);
 v69 = v33 - v50;
 v70 = BitOperations.PopCount(0xFFFBC8AAu);
 v71 = (uint)v70;
 v72 = v4 | 0x00004D11u;
 goto b19;
 b11:
 s_trace[s_traceLen++] = 11;
 v73 = v51 + 0x000003E8u;
 v74 = BitOperations.RotateRight(v39, (int)v42);
 v75 = 0xFFFAF3CAu + v58;
 v76 = (v68 == v19) ? 1 : 0;
 if (v76 != 0) goto b13;
 goto b0;
 b12:
 s_trace[s_traceLen++] = 12;
 v77 = (v4 < v23) ? 1 : 0;
 v78 = (uint)v77;
 v79 = (v35 <= 0x000B9492u) ? 1 : 0;
 v80 = (uint)v79;
 v81 = BitOperations.TrailingZeroCount(0xFFFFFFFFu);
 v82 = (uint)v81;
 return v82;
 b13:
 s_trace[s_traceLen++] = 13;
 v83 = ~v23;
 v84 = v25 + v1;
 v85 = Math.Max(0x80000000u, p1);
 v86 = 0xFFFF5264u % v84;
 v87 = p0 & 0xFFFFFFF9u;
 v88 = ~p0;
 goto b2;
 b19:
 s_trace[s_traceLen++] = 19;
 v118 = (v83 <= 0x000BF458u) ? 1 : 0;
 v119 = (uint)v118;
 v120 = 0x0000001Fu * v93;
 v121 = ~v75;
 v122 = BitOperations.Log2(v24);
 v123 = (uint)v122;
 v124 = v63 + v3;
 return v124;
 }
 }

 [Fact]
 public static int TestEntryPoint()
 {
 try
 {
 s_traceLen = 0;
 uint result = Fn30000002142(s_inputP0, s_inputP1);
 if (result != 0)
 {
 return 101;
 }

 if ((s_traceLen != 1) || (s_trace[0] != 12))
 {
 return 102;
 }

 return 100;
 }
 catch (DivideByZeroException)
 {
 return 103;
 }
 }
}

14 changes: 14 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.csproj

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
<Project Sdk="Microsoft.NET.Sdk">
 <PropertyGroup>
 <!-- Needed for CLRTestEnvironmentVariable -->
 <RequiresProcessIsolation>true</RequiresProcessIsolation>
 <Optimize>True</Optimize>
 </PropertyGroup>
 <ItemGroup>
 <Compile Include="$(MSBuildProjectName).cs" />

 <CLRTestEnvironmentVariable Include="DOTNET_JitEnableOptRepeat" Value="1" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeat" Value="Fn30000002142" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeatCount" Value="2" />
 </ItemGroup>
</Project>
Loading

, '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
JIT: fix RBO constant relop truth evaluation under opt-repeat#129487

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JIT: fix RBO constant relop truth evaluation under opt-repeat
#129487
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8706a52

Initial plan


Copilot Jun 16, 2026
d21dca3

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Copilot Jun 17, 2026

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4 changes: 2 additions & 2 deletions
src/coreclr/jit/redundantbranchopts.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1187,7 +1187,7 @@ bool Compiler::optRedundantBranch(BasicBlock* const block)
 //
 if (vnStore->IsVNConstant(treeNormVN))
 {
 relopValue = (treeNormVN == vnStore->VNZeroForType(TYP_INT)) ? 0 : 1;
 relopValue = (treeNormVN == vnStore->VNZeroForType(vnStore->TypeOfVN(treeNormVN))) ? 0 : 1;
 JITDUMP("Relop [%06u] " FMT_BB " has known value %s\n ", dspTreeID(tree), block->bbNum,
 relopValue == 0 ? "false" : "true");
 }
Expand DownExpand Up@@ -2389,7 +2389,7 @@ bool Compiler::optJumpThreadPhi(BasicBlock* block, GenTree* tree, ValueNum treeN
 //
 if (vnStore->IsVNConstant(substVN))
 {
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(TYP_INT));
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(vnStore->TypeOfVN(substVN)));
 JITDUMP("... substituted VN implies relop is %d when coming from pred " FMT_BB "\n", relopIsTrue,
 predBlock->bbNum);

Expand Down

128 changes: 128 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.cs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,128 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using Xunit;

public class Runtime_129386
{
 private static volatile uint s_inputP0 = 0u;
 private static volatile uint s_inputP1 = 0xFFFFFFFFu;
 private static int[] s_trace = new int[64];
 private static int s_traceLen = 0;

 [MethodImpl(MethodImplOptions.NoInlining)]
 private static uint Fn30000002142(uint p0, uint p1)
 {
 unchecked
 {
 uint v1 = 0, v3 = 0, v4 = 0, v5 = 0, v7 = 0, v11 = 0, v13 = 0, v14 = 0, v19 = 0,
 v22 = 0, v23 = 0, v24 = 0, v25 = 0, v33 = 0, v35 = 0, v39 = 0, v42 = 0,
 v50 = 0, v51 = 0, v58 = 0, v61 = 0, v63 = 0, v66 = 0, v67 = 0, v68 = 0,
 v69 = 0, v71 = 0, v72 = 0, v73 = 0, v74 = 0, v75 = 0, v78 = 0, v80 = 0,
 v82 = 0, v83 = 0, v84 = 0, v85 = 0, v86 = 0, v87 = 0, v88 = 0, v93 = 0,
 v119 = 0, v120 = 0, v121 = 0, v123 = 0, v124 = 0;
 int v6 = 0, v10 = 0, v17 = 0, v21 = 0, v26 = 0, v70 = 0, v76 = 0, v77 = 0,
 v79 = 0, v81 = 0, v118 = 0, v122 = 0;

 b0:
 v6 = (0u < p0) ? 1 : 0;
 if (v6 != 0) goto b1;
 goto b3;
 b1:
 v10 = BitOperations.IsPow2(v7) ? 1 : 0;
 v11 = (uint)v10;
 v14 = v13 - 0x000D3403u;
 v17 = (v14 > v4) ? 1 : 0;
 if (v17 != 0) goto b2;
 goto b10;
 b2:
 s_trace[s_traceLen++] = 2;
 v19 = v5 % p0;
 v21 = (p0 <= v11) ? 1 : 0;
 if (v21 != 0) goto b10;
 goto b11;
 b3:
 v22 = v14 - 0x000CBA13u;
 v23 = v11 | 0xFFFC3D1Au;
 v24 = v4 & v22;
 v25 = 0u & v1;
 v26 = (v24 > p0) ? 1 : 0;
 if (v26 != 0) goto b10;
 goto b12;
 b10:
 s_trace[s_traceLen++] = 10;
 v66 = v51 >>> (int)v61;
 v67 = v58 - 0x0004A8B9u;
 v68 = Math.Max(0xFFFA3E09u, 0xFFFFFFFDu);
 v69 = v33 - v50;
 v70 = BitOperations.PopCount(0xFFFBC8AAu);
 v71 = (uint)v70;
 v72 = v4 | 0x00004D11u;
 goto b19;
 b11:
 s_trace[s_traceLen++] = 11;
 v73 = v51 + 0x000003E8u;
 v74 = BitOperations.RotateRight(v39, (int)v42);
 v75 = 0xFFFAF3CAu + v58;
 v76 = (v68 == v19) ? 1 : 0;
 if (v76 != 0) goto b13;
 goto b0;
 b12:
 s_trace[s_traceLen++] = 12;
 v77 = (v4 < v23) ? 1 : 0;
 v78 = (uint)v77;
 v79 = (v35 <= 0x000B9492u) ? 1 : 0;
 v80 = (uint)v79;
 v81 = BitOperations.TrailingZeroCount(0xFFFFFFFFu);
 v82 = (uint)v81;
 return v82;
 b13:
 s_trace[s_traceLen++] = 13;
 v83 = ~v23;
 v84 = v25 + v1;
 v85 = Math.Max(0x80000000u, p1);
 v86 = 0xFFFF5264u % v84;
 v87 = p0 & 0xFFFFFFF9u;
 v88 = ~p0;
 goto b2;
 b19:
 s_trace[s_traceLen++] = 19;
 v118 = (v83 <= 0x000BF458u) ? 1 : 0;
 v119 = (uint)v118;
 v120 = 0x0000001Fu * v93;
 v121 = ~v75;
 v122 = BitOperations.Log2(v24);
 v123 = (uint)v122;
 v124 = v63 + v3;
 return v124;
 }
 }

 [Fact]
 public static int TestEntryPoint()
 {
 try
 {
 s_traceLen = 0;
 uint result = Fn30000002142(s_inputP0, s_inputP1);
 if (result != 0)
 {
 return 101;
 }

 if ((s_traceLen != 1) || (s_trace[0] != 12))
 {
 return 102;
 }

 return 100;
 }
 catch (DivideByZeroException)
 {
 return 103;
 }
 }
}

14 changes: 14 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.csproj

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
<Project Sdk="Microsoft.NET.Sdk">
 <PropertyGroup>
 <!-- Needed for CLRTestEnvironmentVariable -->
 <RequiresProcessIsolation>true</RequiresProcessIsolation>
 <Optimize>True</Optimize>
 </PropertyGroup>
 <ItemGroup>
 <Compile Include="$(MSBuildProjectName).cs" />

 <CLRTestEnvironmentVariable Include="DOTNET_JitEnableOptRepeat" Value="1" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeat" Value="Fn30000002142" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeatCount" Value="2" />
 </ItemGroup>
</Project>
Loading

, '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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JIT: fix RBO constant relop truth evaluation under opt-repeat#129487

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JIT: fix RBO constant relop truth evaluation under opt-repeat
#129487
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d21dca3

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4 changes: 2 additions & 2 deletions
src/coreclr/jit/redundantbranchopts.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1187,7 +1187,7 @@ bool Compiler::optRedundantBranch(BasicBlock* const block)
 //
 if (vnStore->IsVNConstant(treeNormVN))
 {
 relopValue = (treeNormVN == vnStore->VNZeroForType(TYP_INT)) ? 0 : 1;
 relopValue = (treeNormVN == vnStore->VNZeroForType(vnStore->TypeOfVN(treeNormVN))) ? 0 : 1;
 JITDUMP("Relop [%06u] " FMT_BB " has known value %s\n ", dspTreeID(tree), block->bbNum,
 relopValue == 0 ? "false" : "true");
 }
Expand DownExpand Up@@ -2389,7 +2389,7 @@ bool Compiler::optJumpThreadPhi(BasicBlock* block, GenTree* tree, ValueNum treeN
 //
 if (vnStore->IsVNConstant(substVN))
 {
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(TYP_INT));
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(vnStore->TypeOfVN(substVN)));
 JITDUMP("... substituted VN implies relop is %d when coming from pred " FMT_BB "\n", relopIsTrue,
 predBlock->bbNum);

Expand Down

128 changes: 128 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.cs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,128 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using Xunit;

public class Runtime_129386
{
 private static volatile uint s_inputP0 = 0u;
 private static volatile uint s_inputP1 = 0xFFFFFFFFu;
 private static int[] s_trace = new int[64];
 private static int s_traceLen = 0;

 [MethodImpl(MethodImplOptions.NoInlining)]
 private static uint Fn30000002142(uint p0, uint p1)
 {
 unchecked
 {
 uint v1 = 0, v3 = 0, v4 = 0, v5 = 0, v7 = 0, v11 = 0, v13 = 0, v14 = 0, v19 = 0,
 v22 = 0, v23 = 0, v24 = 0, v25 = 0, v33 = 0, v35 = 0, v39 = 0, v42 = 0,
 v50 = 0, v51 = 0, v58 = 0, v61 = 0, v63 = 0, v66 = 0, v67 = 0, v68 = 0,
 v69 = 0, v71 = 0, v72 = 0, v73 = 0, v74 = 0, v75 = 0, v78 = 0, v80 = 0,
 v82 = 0, v83 = 0, v84 = 0, v85 = 0, v86 = 0, v87 = 0, v88 = 0, v93 = 0,
 v119 = 0, v120 = 0, v121 = 0, v123 = 0, v124 = 0;
 int v6 = 0, v10 = 0, v17 = 0, v21 = 0, v26 = 0, v70 = 0, v76 = 0, v77 = 0,
 v79 = 0, v81 = 0, v118 = 0, v122 = 0;

 b0:
 v6 = (0u < p0) ? 1 : 0;
 if (v6 != 0) goto b1;
 goto b3;
 b1:
 v10 = BitOperations.IsPow2(v7) ? 1 : 0;
 v11 = (uint)v10;
 v14 = v13 - 0x000D3403u;
 v17 = (v14 > v4) ? 1 : 0;
 if (v17 != 0) goto b2;
 goto b10;
 b2:
 s_trace[s_traceLen++] = 2;
 v19 = v5 % p0;
 v21 = (p0 <= v11) ? 1 : 0;
 if (v21 != 0) goto b10;
 goto b11;
 b3:
 v22 = v14 - 0x000CBA13u;
 v23 = v11 | 0xFFFC3D1Au;
 v24 = v4 & v22;
 v25 = 0u & v1;
 v26 = (v24 > p0) ? 1 : 0;
 if (v26 != 0) goto b10;
 goto b12;
 b10:
 s_trace[s_traceLen++] = 10;
 v66 = v51 >>> (int)v61;
 v67 = v58 - 0x0004A8B9u;
 v68 = Math.Max(0xFFFA3E09u, 0xFFFFFFFDu);
 v69 = v33 - v50;
 v70 = BitOperations.PopCount(0xFFFBC8AAu);
 v71 = (uint)v70;
 v72 = v4 | 0x00004D11u;
 goto b19;
 b11:
 s_trace[s_traceLen++] = 11;
 v73 = v51 + 0x000003E8u;
 v74 = BitOperations.RotateRight(v39, (int)v42);
 v75 = 0xFFFAF3CAu + v58;
 v76 = (v68 == v19) ? 1 : 0;
 if (v76 != 0) goto b13;
 goto b0;
 b12:
 s_trace[s_traceLen++] = 12;
 v77 = (v4 < v23) ? 1 : 0;
 v78 = (uint)v77;
 v79 = (v35 <= 0x000B9492u) ? 1 : 0;
 v80 = (uint)v79;
 v81 = BitOperations.TrailingZeroCount(0xFFFFFFFFu);
 v82 = (uint)v81;
 return v82;
 b13:
 s_trace[s_traceLen++] = 13;
 v83 = ~v23;
 v84 = v25 + v1;
 v85 = Math.Max(0x80000000u, p1);
 v86 = 0xFFFF5264u % v84;
 v87 = p0 & 0xFFFFFFF9u;
 v88 = ~p0;
 goto b2;
 b19:
 s_trace[s_traceLen++] = 19;
 v118 = (v83 <= 0x000BF458u) ? 1 : 0;
 v119 = (uint)v118;
 v120 = 0x0000001Fu * v93;
 v121 = ~v75;
 v122 = BitOperations.Log2(v24);
 v123 = (uint)v122;
 v124 = v63 + v3;
 return v124;
 }
 }

 [Fact]
 public static int TestEntryPoint()
 {
 try
 {
 s_traceLen = 0;
 uint result = Fn30000002142(s_inputP0, s_inputP1);
 if (result != 0)
 {
 return 101;
 }

 if ((s_traceLen != 1) || (s_trace[0] != 12))
 {
 return 102;
 }

 return 100;
 }
 catch (DivideByZeroException)
 {
 return 103;
 }
 }
}

14 changes: 14 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.csproj

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
<Project Sdk="Microsoft.NET.Sdk">
 <PropertyGroup>
 <!-- Needed for CLRTestEnvironmentVariable -->
 <RequiresProcessIsolation>true</RequiresProcessIsolation>
 <Optimize>True</Optimize>
 </PropertyGroup>
 <ItemGroup>
 <Compile Include="$(MSBuildProjectName).cs" />

 <CLRTestEnvironmentVariable Include="DOTNET_JitEnableOptRepeat" Value="1" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeat" Value="Fn30000002142" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeatCount" Value="2" />
 </ItemGroup>
</Project>
Loading

, '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 RBO constant relop truth evaluation under opt-repeat#129487

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JIT: fix RBO constant relop truth evaluation under opt-repeat
#129487
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8706a52

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Copilot Jun 16, 2026
d21dca3

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Copilot Jun 17, 2026

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4 changes: 2 additions & 2 deletions
src/coreclr/jit/redundantbranchopts.cpp

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Original file line numberDiff line numberDiff line change
Expand Up@@ -1187,7 +1187,7 @@ bool Compiler::optRedundantBranch(BasicBlock* const block)
 //
 if (vnStore->IsVNConstant(treeNormVN))
 {
 relopValue = (treeNormVN == vnStore->VNZeroForType(TYP_INT)) ? 0 : 1;
 relopValue = (treeNormVN == vnStore->VNZeroForType(vnStore->TypeOfVN(treeNormVN))) ? 0 : 1;
 JITDUMP("Relop [%06u] " FMT_BB " has known value %s\n ", dspTreeID(tree), block->bbNum,
 relopValue == 0 ? "false" : "true");
 }
Expand DownExpand Up@@ -2389,7 +2389,7 @@ bool Compiler::optJumpThreadPhi(BasicBlock* block, GenTree* tree, ValueNum treeN
 //
 if (vnStore->IsVNConstant(substVN))
 {
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(TYP_INT));
 const bool relopIsTrue = (substVN != vnStore->VNZeroForType(vnStore->TypeOfVN(substVN)));
 JITDUMP("... substituted VN implies relop is %d when coming from pred " FMT_BB "\n", relopIsTrue,
 predBlock->bbNum);

Expand Down

128 changes: 128 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.cs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,128 @@
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using Xunit;

public class Runtime_129386
{
 private static volatile uint s_inputP0 = 0u;
 private static volatile uint s_inputP1 = 0xFFFFFFFFu;
 private static int[] s_trace = new int[64];
 private static int s_traceLen = 0;

 [MethodImpl(MethodImplOptions.NoInlining)]
 private static uint Fn30000002142(uint p0, uint p1)
 {
 unchecked
 {
 uint v1 = 0, v3 = 0, v4 = 0, v5 = 0, v7 = 0, v11 = 0, v13 = 0, v14 = 0, v19 = 0,
 v22 = 0, v23 = 0, v24 = 0, v25 = 0, v33 = 0, v35 = 0, v39 = 0, v42 = 0,
 v50 = 0, v51 = 0, v58 = 0, v61 = 0, v63 = 0, v66 = 0, v67 = 0, v68 = 0,
 v69 = 0, v71 = 0, v72 = 0, v73 = 0, v74 = 0, v75 = 0, v78 = 0, v80 = 0,
 v82 = 0, v83 = 0, v84 = 0, v85 = 0, v86 = 0, v87 = 0, v88 = 0, v93 = 0,
 v119 = 0, v120 = 0, v121 = 0, v123 = 0, v124 = 0;
 int v6 = 0, v10 = 0, v17 = 0, v21 = 0, v26 = 0, v70 = 0, v76 = 0, v77 = 0,
 v79 = 0, v81 = 0, v118 = 0, v122 = 0;

 b0:
 v6 = (0u < p0) ? 1 : 0;
 if (v6 != 0) goto b1;
 goto b3;
 b1:
 v10 = BitOperations.IsPow2(v7) ? 1 : 0;
 v11 = (uint)v10;
 v14 = v13 - 0x000D3403u;
 v17 = (v14 > v4) ? 1 : 0;
 if (v17 != 0) goto b2;
 goto b10;
 b2:
 s_trace[s_traceLen++] = 2;
 v19 = v5 % p0;
 v21 = (p0 <= v11) ? 1 : 0;
 if (v21 != 0) goto b10;
 goto b11;
 b3:
 v22 = v14 - 0x000CBA13u;
 v23 = v11 | 0xFFFC3D1Au;
 v24 = v4 & v22;
 v25 = 0u & v1;
 v26 = (v24 > p0) ? 1 : 0;
 if (v26 != 0) goto b10;
 goto b12;
 b10:
 s_trace[s_traceLen++] = 10;
 v66 = v51 >>> (int)v61;
 v67 = v58 - 0x0004A8B9u;
 v68 = Math.Max(0xFFFA3E09u, 0xFFFFFFFDu);
 v69 = v33 - v50;
 v70 = BitOperations.PopCount(0xFFFBC8AAu);
 v71 = (uint)v70;
 v72 = v4 | 0x00004D11u;
 goto b19;
 b11:
 s_trace[s_traceLen++] = 11;
 v73 = v51 + 0x000003E8u;
 v74 = BitOperations.RotateRight(v39, (int)v42);
 v75 = 0xFFFAF3CAu + v58;
 v76 = (v68 == v19) ? 1 : 0;
 if (v76 != 0) goto b13;
 goto b0;
 b12:
 s_trace[s_traceLen++] = 12;
 v77 = (v4 < v23) ? 1 : 0;
 v78 = (uint)v77;
 v79 = (v35 <= 0x000B9492u) ? 1 : 0;
 v80 = (uint)v79;
 v81 = BitOperations.TrailingZeroCount(0xFFFFFFFFu);
 v82 = (uint)v81;
 return v82;
 b13:
 s_trace[s_traceLen++] = 13;
 v83 = ~v23;
 v84 = v25 + v1;
 v85 = Math.Max(0x80000000u, p1);
 v86 = 0xFFFF5264u % v84;
 v87 = p0 & 0xFFFFFFF9u;
 v88 = ~p0;
 goto b2;
 b19:
 s_trace[s_traceLen++] = 19;
 v118 = (v83 <= 0x000BF458u) ? 1 : 0;
 v119 = (uint)v118;
 v120 = 0x0000001Fu * v93;
 v121 = ~v75;
 v122 = BitOperations.Log2(v24);
 v123 = (uint)v122;
 v124 = v63 + v3;
 return v124;
 }
 }

 [Fact]
 public static int TestEntryPoint()
 {
 try
 {
 s_traceLen = 0;
 uint result = Fn30000002142(s_inputP0, s_inputP1);
 if (result != 0)
 {
 return 101;
 }

 if ((s_traceLen != 1) || (s_trace[0] != 12))
 {
 return 102;
 }

 return 100;
 }
 catch (DivideByZeroException)
 {
 return 103;
 }
 }
}

14 changes: 14 additions & 0 deletions
src/tests/JIT/Regression/JitBlue/Runtime_129386/Runtime_129386.csproj

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,14 @@
<Project Sdk="Microsoft.NET.Sdk">
 <PropertyGroup>
 <!-- Needed for CLRTestEnvironmentVariable -->
 <RequiresProcessIsolation>true</RequiresProcessIsolation>
 <Optimize>True</Optimize>
 </PropertyGroup>
 <ItemGroup>
 <Compile Include="$(MSBuildProjectName).cs" />

 <CLRTestEnvironmentVariable Include="DOTNET_JitEnableOptRepeat" Value="1" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeat" Value="Fn30000002142" />
 <CLRTestEnvironmentVariable Include="DOTNET_JitOptRepeatCount" Value="2" />
 </ItemGroup>
</Project>
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