rematerialization rollback logic#4

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lucas-rami wants to merge 4 commits intomainfrom

rematerialization-rollback-logic

Commits on Jan 19, 2026

[AMDGPU][Scheduler] Make `finalizeGCNRegion` an overridable hook (NFC)
lucas-rami
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Commits on Jan 20, 2026

[AMDGPU][Scheduler] Simplify scheduling revert logic
lucas-rami
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Commits on Jan 21, 2026

[AMDGPU][Scheduler] Revert all regions when remat fails to increase occ.
lucas-rami
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Re-apply "[AMDGPU][Scheduler] Scoring system for rematerializations (#175050)"
lucas-rami
committed