[Bug lto/66752] New: spec2000 255.vortex performance compiled with GCC is ~20% lower than with CLANG

[evstupac at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66752

            Bug ID: 66752
           Summary: spec2000 255.vortex performance compiled with GCC is
                    ~20% lower than with CLANG
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: evstupac at gmail dot com
  Target Milestone: ---

Should be reproduced with:
"-Ofast -flto -m32" on latest GCC and CLANG.

Mostly GCC looses performance in Part_Delete function.

I'm working on a small test reproducer.