> Without knowing about specific compiler targets/settings this looks reasonable. But we do, armv8-a clang 21.1.0 with O3, and it doesn't. > […] but smart on

> Without knowing about specific compiler targets/settings this looks reasonable. But we do, armv8-a clang 21.1.0 with O3, and it doesn't. > […] but smart on the lowest common denominator. No, that would be the single add instruction.