[v3] libstdc++/44413 (for ext/vstring)

Jonathan Wakely jwakely.gcc@gmail.com
Wed Jun 9 21:37:00 GMT 2010

How about keeping the current semantics, but adding __builtin_expect
so that the code is optimised to assume the difference won't be
greater than INT_MAX or less than INT_MIN?

Presumably on 32bit the builtin_expect(diff_type <= INT_MAX) would be
equivalent to what we have now, but on 64bit would be no worse.

More information about the Libstdc++ mailing list