[Bug tree-optimization/40896] cprop-registers optimization produces invalid code as of r148601

[spop at gcc dot gnu dot org]

------- Comment #1 from spop at gcc dot gnu dot org  2009-07-29 04:11 -------
Hi,

>From what I read this has nothing to do with Graphite.  Could you
please reduce the bug using ideas from:
http://gcc.gnu.org/wiki/A_guide_to_testcase_reduction

I am using to compile everything with a working compiler, and then I
am compiling file by file with the problematic compiler: compiling one
file at a time until I manage to reproduce the miscompiled behavior.
>From there you still need to figure out which function is miscompiled,
and then to show what is the difference with respect to the working
compiler.  The fact that you already know two close by revisions of 
GCC one that miscompiles and the other that does not should be of
big help already to reduce your testcase.

If you fail to reduce the bug, nobody is going to look at this bug
report.  Once you have a valid testcase that shows the miscompile,
please reopen this bug report.  With a testcase in hand, half the job
to fix your problem is done.

Thanks again for your work,
Sebastian


-- 

spop at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40896