[Bug c++/71587] New: missed inlining extern template function

[programmerjake at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71587

            Bug ID: 71587
           Summary: missed inlining extern template function
           Product: gcc
           Version: 5.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: programmerjake at gmail dot com
  Target Milestone: ---

missed inlining fn2<false>

version: (Ubuntu 5.3.0-3ubuntu1~14.04) 5.3.0 20151204

command: g++-5 -O3 -S -std=c++11 -xc++ -
source:
template <bool V>
void fn2();

extern template void fn2<false>();

void fn3();

void fn()
{
  fn2<false>();
  fn3();
}

template <bool V>
void fn2()
{
}

template void fn2<false>();

It generates
        subq    $8, %rsp
        call    void fn2<false>()
        addq    $8, %rsp
        jmp     fn3()
It should generate
        jmp     fn3()