An internal build is hitting asserts complaining about too many subtarget features:
llvm/utils/TableGen/Types.cpp:42: const char* llvm::getMinimalTypeForEnumBitfield(uint64_t): Assertion `MaxIndex <= 64 && "Too many bits"' failed.
llvm/utils/TableGen/AsmMatcherEmitter.cpp:1476: void {anonymous}::AsmMatcherInfo::buildInfo(): Assertion `SubtargetFeatures.size() <= 64 && "Too many subtarget features!"' failed.The short-term solution is to remove a few unused AssemblerPredicates to get under the limit.
The long-term solution seems to be to revisit these asserts. E.g., rather than hardcoded '64', use the standard sized std::bitset like the other places that track subtarget features.