https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67351
Bug ID: 67351
Summary: Missed optimisation on 64-bit field compared to 32-bit
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: linux at carewolf dot com
Target Milestone: ---
Created attachment 36253
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36253&action=edit
Test
Gcc will expand and detect field setting on 32-bit integers, but for some
reason miss the opportunity on 64-bit.
This was discovered as gcc was inexplicably slower compared to clang on the
64-bit case but not when using 32bit.
