https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90085
Bug ID: 90085
Summary: c++17 template argument deduction results in missed
optimization
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: s1445051 at mail dot zih.tu-dresden.de
Target Milestone: ---
Created attachment 46164
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46164&action=edit
test case
When deducing template arguments of a constexpr std::array, all the elements
(strings in the test case) are stored in the data section, regardless if there
are used in the program or not. Without template argument deduction only the
accessed elements are stored in the data section. Template argument deduction
somehow prevents the reduction of the constants.
https://godbolt.org/z/q_COuU
