[Bug tree-optimization/37416] [4.4 Regression] Failure to return number of loop iterations

[irar at il dot ibm dot com]

------- Comment #2 from irar at il dot ibm dot com  2008-11-22 15:08 -------
(In reply to comment #1)
> This bug is shamefully incomplete.  There is no way anyone willing to give this
> a look can know what to look for.
> For example, a few things one would have to know before he/she can even begin
> to consider whether/how to analyze the problem:
> 1. What is the target where you see this?
> 2. What compiler flags are you using?
-O3

> 3. Where do you look for the number of iterations (which dump)?
vectorizer's dump

> 4. What "missed-optimization" does this cause (something not vectorized)?
the loop is not vectorized because the number of iterations is unknown

> Please read http://gcc.gnu.org/bugs.html#report before filing more bugs.


-- 

irar at il dot ibm dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  GCC build triplet|                            |x86_64-suse-linux
   GCC host triplet|                            |x86_64-suse-linux
 GCC target triplet|                            |x86_64-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37416