https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102974
Bug ID: 102974 Summary: GCC optimization is very poor for add carry and multiplication combos Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: unlvsur at live dot com Target Milestone: --- GCC: https://godbolt.org/z/6sc6v5YcG clang: https://godbolt.org/z/eP8fTrWzd msvc: https://godbolt.org/z/snzoEe5he GCC generates 16 more instructions than msvc and clang for carry flag optimizations.