https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110383
Bug ID: 110383
Summary: Missed optimiztion: Default operator== with trivial
struct can be replaced with bcmp
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: madhur4127 at gmail dot com
Target Milestone: ---
Godbolt: https://compiler-explorer.com/z/Gr8E5zfo5
Default operator== produces inefficient assembly where it checks for each data
member therefore having a lot of branches. Clang produces better assembly with
memcmp / bcmp.
I know its hard to generalize performance claims but in the worst case having 8
branches (one for each member), is not more efficient than a bcmp.
