These days there aren't many pre-SSE2 CPUs floating around, and it's basically a requirement for Windows 7 and up. On XP, the base requirement is a Pentium 1 (not even Pentium Pro.) WinFile could require a newer CPU than XP, but these instructions seem to be of limited value to it anyway, so there doesn't seem to be a good reason to stick with the SSE2 compiler default.
I dumped out the assembly from this and verified that cmov instructions are only used under runtime checks. They're still used conditionally in strchr and strrchr operations.
These days there aren't many pre-SSE2 CPUs floating around, and it's basically a requirement for Windows 7 and up. On XP, the base requirement is a Pentium 1 (not even Pentium Pro.) WinFile could require a newer CPU than XP, but these instructions seem to be of limited value to it anyway, so there doesn't seem to be a good reason to stick with the SSE2 compiler default.
I dumped out the assembly from this and verified that
cmovinstructions are only used under runtime checks. They're still used conditionally instrchrandstrrchroperations.