Fixes reg_is_gpr() to return false for both XZR and WZR.
Adds handling of the two zero register names to the register resize routines.
Adds some tests to api.ir.
Fixes #4560 (closed)
Fixes reg_is_gpr() to return false for both XZR and WZR.
Adds handling of the two zero register names to the register resize routines.
Adds some tests to api.ir.
Fixes #4560 (closed)