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

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