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[utils/TableGen/X86CompressEVEXTablesEmitter.cpp] Make sure the tablegen output for the `checkPredicate` function is deterministic (#84533) The output for the `checkPredicate` function was depending on a `std::map` iteration that was non-deterministic from run to run, because the keys were pointer values. Make a change so that the keys are `StringRef`s so the ordering is stable. This avoids non-determinism in llvm-tblgen output, which could cause differences in the generated X86GenCompressEVEXTables.inc file. Although these differences are not influencing the meaning of the generated code, they still change a few bytes in libllvm. This in turn influences all the binaries linked with libllvm, such as clang, ld.lld, etc. Reported by: cperciva MFC after: 3 days |
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