https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71258
Bug ID: 71258
Summary: Missed optimizations: dynamic allocation, virtual
calls, empty destructors
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rureclonic at thraml dot com
Target Milestone: ---
clang: https://godbolt.org/g/IjYT24
gcc: https://godbolt.org/g/nkGVdB
It would seem gcc is not able to eliminate the calls to new, the virtual call
to concept::magic and the destructors, while clang completely optimizes out the
program.
interesting variation: https://godbolt.org/g/2ic8qL
Interleaving the construction of polys with the additions produces an output
with no virtual calls to concept::magic, yet without eliminating the calls to
new and destructors.
