fix(VMPromising): Mark UBs in ifetch handling - #207
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- Track ifetch translation validity in the selected translation result.
- Reject ifetch faults and ifetch translations that do not use timestamp-0 TLB entries.
- Require successful ifetch translations to consume the selected TLB entry.
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- Track ifetch translation validity in the selected translation result. - Reject ifetch faults and ifetch translations whose selected TLB entry is absent from the first visible TLB snapshot. - Require successful ifetch translations to consume the selected TLB entry.
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