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.