Forums before death by AOL, social media and spammers... "We can't have nice things"
|    comp.compilers    |    Compiler construction, theory, etc. (Mod    |    2,753 messages    |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
|    Message 1,374 of 2,753    |
|    sandyasm@gmail.com to All    |
|    recognition and optimization of prefix c    |
|    17 Jun 08 01:34:20    |
      Hi,              Does the current C/C++ compilers in industry recognize idioms of the       form of prefix computation and transform them? For instance, given              for (i = 0; i < n; i++)        for (j = 0; j < i; j++)        result[i] = result[i] + a[j];                     ---> transform this to               result [0] = a[0];        for (i = 1; i < n; i++)        result[i] = result[i-1] + a[i];              If so, under what class of optimizations do they do this?              In the general case, a similar prefix pattern can be identified and       seen in certain search/traversal algorithms also. Do the existing       compilers handle any of those as well?              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]
(c) 1994, bbs@darkrealms.ca