[release/10.0] JIT: bail from optOptimizeBoolsCondBlock on GTF_UNSIGNED inputs#128960
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[release/10.0] JIT: bail from optOptimizeBoolsCondBlock on GTF_UNSIGNED inputs#128960github-actions[bot] wants to merge 1 commit into
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optOptimizeBoolsCondBlock folds pairs of BBJ_COND blocks of the form "(x == 0) || (x relop 0)" into a single directional comparison. Mirror the existing check at the (LT,LT)/(LT,GE) folds and bail out if either input is unsigned. Possible a fix for #128895. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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EgorBo
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Jun 3, 2026
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Backport of #128928 to release/10.0
/cc @AndyAyersMS
Customer Impact
Reported in #128895. Impacts a shipping app.
Regression
Regression from .NET 8/9 (though the introducing change #78786 was also in .NET 8, but apparently not easily reachable).
Testing
Created independent repro based on customer's report. Developed fix and shared with customer, who validated it on their app. Local testing (SPMI, etc) revealed no diffs.
Risk
Low. Disables an optimization.