[SPARC][IAS] Make 64-bit instructions available in 32-bit mode on V9 (#187534) When the ISA level is V9, 64-bit instruction definitions should be available even if currently it's not used by any patterns. This should allow usage of 64-bit instructions, like `sllx`/`srlx`, in inline assembly snippets in a source file otherwise intended to target V9 processors running in 32-bit mode, as found in, for example, the Linux kernel.
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