https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90967
Bug ID: 90967
Summary: -Os produces more code than -O1
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: oliverst at online dot de
Target Milestone: ---
Created attachment 46512
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46512&action=edit
example code
The attached code produces an empty main when compiled with -std=c++11 -Os in
GCC 4.9.4. Starting with GCC 5.1.0 it will produce code involving a
basic_string move constructor. When compiled with -O1 it will always produce an
empty function.
