-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 09/26/11 03:06, charfi asma wrote: > Hello every body, > > First of all, thank you for all your responses ;) > > > this situation is frequent in real time and embedded system > development (developper use switch cas statements to express the > behavior of the system). > > I think that GCC purpose is to help developper to produce an > optimized code for their application. developper are not obliged to > optimize the code, we have to be happy if they manage to write the > correct code (that runs just like developper want it to run). > Otherwise, optimization is the GCC stuff... @ David: if (x=1) was a > typo, I meant if (x==1). > > you said that The "tail merging" and "block merging" mentioned by > Jeff Law sounds like optimisations to suit such cases. > > I tested with gcc 4.6 (the current gcc version) I compiled the code > using -Os and GCC did not optimize the code. did block merging and > tail merging are not included in -Os ? > Tom's changes aren't in GCC 4.6, you'd have to test the current sources. jeff -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJOgK3kAAoJEBRtltQi2kC7IpkH/1aZzqaHYWOgBotOntRoMsHM SS1qmsr2AdK33tiEDCvMVRA3sfAN8s8wfhpudYK0dTL5/VG2KhNipdSHZp3N7CgX 7EYuOebVU0na1ucvBChHdCDiIXV5u81UjPr8t7fwK7x78k5/2xeuMAv2U2DvPWmk 8hH9IDzFppSWFE413gnT5ONEoYImINWaAiiAINU/OsxblTpTh4UGl7wfdygzIcGc k3txE2fRGel07hJvy0T72MtkPuCfw2ISa262/yN4zpEIwh8nssljy4pb4Wos55Dl IAEHNgxlAxfJoDVjpZVmqf80a8nNRa9OV1pUlN5+gYM/QABmT25QIVE2KWse3j4= =L+dW -----END PGP SIGNATURE-----
