https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92802
Bug ID: 92802
Summary: Struct field reordering
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: christoph.muell...@theobroma-systems.com
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Non-escaping structs [1] can be rearranged such that
they have a smaller memory footprint and thus allow
a more efficient cache utilisation.
We are currently working on such a pass and want to use this
ticket to further publish details and patches, and to collect
feedback from the community.
First implementation details:
* Reordering is based on modification of DECL_CHAIN()s of TYPE_FIELDS(t)
* Reordering based on size (biggest to smallest)
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92800
