[webkit-changes] [WebKit/WebKit] 8b1288: Reduce necessary bits in some compact pointer enco...

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  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 8b1288d0a44b3d28f7266449d1c123618bcd0fac
      https://github.com/WebKit/WebKit/commit/8b1288d0a44b3d28f7266449d1c123618bcd0fac
  Author: David Degazio <d_degazio at apple.com>
  Date:   2023-12-08 (Fri, 08 Dec 2023)

  Changed paths:
    M Source/JavaScriptCore/dfg/DFGEdge.h
    M Source/bmalloc/libpas/src/libpas/pas_enumerate_segregated_heaps.c
    M Source/bmalloc/libpas/src/libpas/pas_segregated_page_config_kind_and_role.h
    M Source/bmalloc/libpas/src/libpas/pas_thread_local_cache.c
    M Source/bmalloc/libpas/src/libpas/pas_thread_local_cache.h

  Log Message:
  -----------
  Reduce necessary bits in some compact pointer encodings
https://bugs.webkit.org/show_bug.cgi?id=266098
rdar://119397319

Reviewed by Mark Lam.

Reduces the reserved non-pointer space for some ad-hoc compact pointer tuples.

* Source/JavaScriptCore/dfg/DFGEdge.h:
(JSC::DFG::Edge::shift):
(JSC::DFG::Edge::addressMask):
(JSC::DFG::Edge::node const):
(JSC::DFG::Edge::useKindUnchecked const):
(JSC::DFG::Edge::proofStatusUnchecked const):
(JSC::DFG::Edge::killStatusUnchecked const):
(JSC::DFG::Edge::makeWord):
* Source/bmalloc/libpas/src/libpas/pas_enumerate_segregated_heaps.c:
(pas_enumerate_segregated_heaps):
* Source/bmalloc/libpas/src/libpas/pas_segregated_page_config_kind_and_role.h:
* Source/bmalloc/libpas/src/libpas/pas_thread_local_cache.c:
(process_deallocation_log_with_config):
(flush_deallocation_log_without_resetting):
* Source/bmalloc/libpas/src/libpas/pas_thread_local_cache.h:
(pas_thread_local_cache_encode_object):

Canonical link: https://commits.webkit.org/271789@main