[gcc/ARM/heads/morello] Handle split stacks in unwinder

[Stam Markianos-Wright]

The branch 'ARM/heads/morello' was updated to point to:

 ef254a8c7f2... Handle split stacks in unwinder

It previously pointed to:

 0aefaf8fd03... Handle MEM_REF[&<something>] in gimple

Diff:

!!! WARNING: THE FOLLOWING COMMITS ARE NO LONGER ACCESSIBLE (LOST):
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  0aefaf8... Handle MEM_REF[&<something>] in gimple
  c69da89... convert.c: Add logic for widening conversions of capabiliti
  c5fc2e2... c, cp: Remove drop_intcap helper
  535b953... morello testsuite: Fix up global-constants.c test
  d11f8e1... morello testsuite: Fix up const-null.c test
  d8b6037... morello testsuite: Fixes for hybrid
  e448c8a... morello testsuite: Fix up const-pool-1.c test
  3645660... c, cp: Switch to handling __capability as a keyword
  c863bfd... except.c: Fix bootstrap
  b239ebd... Fix up testsuite for purecap mmap behaviour
  be61a38... Un-obfuscate addresses with cheri bounds for debug info