Messages in this thread |  | | Date | Sun, 15 Dec 1996 09:09:16 -0600 | From | Mark Orr <> | Subject | strength-reduction |
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Samuel S Chessman wrote:
>I do not use -fno-strength-reduce as I have a patched gcc 2.7.2.
-fno-strength-reduce make code _faster_ on Intel PC's. 80x86'es dont have very many registers, and strength-reduction makes one less register available for the "reduced" calcuation. It might make sense on RISC CPU's with flocks of registers, but not with 486's, Pentiums or PPros.
I've done benchmark tests with this... -fno-strength-reduce improved scores significantly (at least 5-10% on dhrystone2). So even if you have patched to correct the bug, it's better to leave it in.
---- Mark Orr markorr@intersurf.com
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