JIT: some GT_INDEX_ADDRs won't need throw helpers#124286
Merged
AndyAyersMS merged 3 commits intodotnet:mainfrom Feb 12, 2026
Merged
JIT: some GT_INDEX_ADDRs won't need throw helpers#124286AndyAyersMS merged 3 commits intodotnet:mainfrom
AndyAyersMS merged 3 commits intodotnet:mainfrom
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Saves a bit of code size for unoptimized methods. Also we should not see GT_ARR_ELEM post-morph.
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Pull request overview
This PR refines CoreCLR JIT throw-helper usage tracking to avoid conservatively marking range-check helpers as used when a GT_INDEX_ADDR doesn’t actually emit a bounds check (primarily benefiting MinOpts/unoptimized methods), and adds an invariant check that GT_ARR_ELEM should not appear post-morph.
Changes:
- Only mark
SCK_RNGCHK_FAILas used forGT_INDEX_ADDRwhenIsBoundsChecked()is true. - Add a debug assertion that
GT_ARR_ELEMshould not exist after morph (and stop treating it as a range-check-helper user here).
EgorBo
approved these changes
Feb 11, 2026
This was referenced Feb 12, 2026
Co-authored-by: SingleAccretion <62474226+SingleAccretion@users.noreply.github.com>
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Saves a bit of code size for unoptimized methods.
Also we should not see GT_ARR_ELEM post-morph.