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[commit] Extend Xtensa Call0 prologue analysis to handle dynamic stack adjustments


Xtensa Call0 ABI has been extended to introduce dynamic stack
adjustments. When two adjacent stack frames require different
alignments Callee's stack pointer can be moved by introducing
possible padding. Xtensa CAll0 prologue analysis has to be
aware of these changes.

Also, some comments have been added / updated.


Attachment: DS.diff
Description: Text document


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