[Bug optimization/9531] Problem with -fprefetch-loop-arrays -funroll-loops

[Bug optimization/9531] Problem with -fprefetch-loop-arrays -funroll-loops

[dhazeghi@yahoo.com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9531


dhazeghi@yahoo.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |green@redhat.com
             Status|UNCONFIRMED                 |WAITING


------- Additional Comments From dhazeghi@yahoo.com  2003-06-01 23:02 -------
Hello,

in this report it's unclear what your host and target are. You say this is all i686-pc-linux-gnu, but 
mips4 is clearly from another target. Neither using a mips-irix nor an i686-linux compiler 
produces anything remotely resembling the assembly you quote... Can you clarify please? Thanks,

Dara



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[Bug optimization/9531] Problem with -fprefetch-loop-arrays -funroll-loops

[green@redhat.com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9531



------- Additional Comments From green@redhat.com  2003-06-02 02:32 -------
I don't know why the bug report claims to be for an i686-pc-linux-gnu target. 
I configured with --target=mips-elf.

I suspect that this problem will show up for any target that supports prefetching.



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[Bug optimization/9531] Problem with -fprefetch-loop-arrays -funroll-loops

[dhazeghi@yahoo.com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9531


dhazeghi@yahoo.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2003-06-05 01:05:44
               date|                            |


------- Additional Comments From dhazeghi@yahoo.com  2003-06-05 01:05 -------
Confirmed with gcc 3.3 branch and mainline (20030604). With branch, there are 12 prefetch 
instructions in a row. With mainline, there are 10 prefetch instructions, but they are spread out. 
This is with a mips-elf cross-compiler using -O3 -funroll-loops -fprefetch-loop-arrays -
march=mips4.

Dara

P.S. Oh the reason this bug report had i686-linux as the target initially is that's what Target was 
set to in the original GNATS report...



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[Bug optimization/9531] Problem with -fprefetch-loop-arrays -funroll-loops

[green at redhat dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9531



------- Additional Comments From green at redhat dot com  2003-11-05 15:07 -------
I just tried today's (20031105) tree-ssa branch and it doesn't appear to have
this problem anymore.  Presumably HEAD is in better shape as well.  It's
probably not worth fixing just for the 3.3 branch.

AG

[Bug optimization/9531] Problem with -fprefetch-loop-arrays -funroll-loops

[bangerth at dealii dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9531


bangerth at dealii dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


------- Additional Comments From bangerth at dealii dot org  2003-11-05 16:07 -------
Aparently fixed, according to submitter. Thanks for giving us this feedback,
Anthony!

W.

[Bug optimization/9531] Problem with -fprefetch-loop-arrays -funroll-loops

[dhazeghi at yahoo dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9531