Commits on Oct 1, 2024

1. winch: Propery define destination registers …

   No functional changes are introduced as part of this change.
   
   This commit introduces a formal mechanism for identifying destination
   registers in Winch's MacroAssembler and Assembler layers.
   
   Before this change, there was no standardized way to identify writable
   registers, which made it challenging to:
   
   * Audit register clobbering effectively.
   * Establish a consistent approach for defining new MacroAssembler
     methods, as the identification of writable registers was done ad-hoc
     and varied from method to method.
   
   This enhancement aims to improve code maintainability and reduce
   potential errors related to register management.
   
   This commit makes use of Cranelift's `Writable<T>` type to identify writable
   registers.

   

   saulecabrera committed Oct 1, 2024
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