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2 Commits

Author SHA1 Message Date
Amir Ayupov 442e9e1389 [X86][NFC] MnemonicTables: only access RI fields if they're initialized 
Fix an issue reported by UBSan.

Test Plan:
Configure with `-DLLVM_USE_SANITIZER="Address;Undefined"`
`ninja llc`

Differential Revision: https://reviews.llvm.org/D122140
 2022-03-21 09:25:29 -07:00
Amir Ayupov fdcb256f97 [TableGen] X86 mnemonic tables backend 
Add tablegen backend that generates X86 mnemonic-based opcode groupings, e.g.
`isADD`, `isTEST`, etc.

Addresses https://lists.llvm.org/pipermail/llvm-dev/2022-January/154526.html

Reviewed By: skan

Differential Revision: https://reviews.llvm.org/D121571
 2022-03-18 01:43:53 -07:00