[LLVM] [TableGen] Read from uninitialised variable #66889
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Fixing an issue found in a UBsan build. When defining a variable-length encoding with no operands or slices, the HasDynamicSegment member was read without being initialised.
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Fixing an issue found in a UBsan build. When defining a variable-length
encoding with no operands or slices, the HasDynamicSegment member was
read without being initialised.