[Bug tree-optimization/44303] New: [graphite] Segmentation fault within CLooG

: nbenoit at tuxfamily dot org GCC build triplet: x86_64-unknown-linux-gnu GCC host triplet: x86_64-unknown-linux-gnu GCC target triplet: x86_64-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44303

[Bug tree-optimization/42027] [4.5 Regression] Performance regression in convolution loop optimization

--- Comment #17 from nbenoit at tuxfamily dot org 2009-12-17 09:32 --- (In reply to comment #16) Created an attachment (id=19332) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19332action=view) [edit] Real fix Now, before I blow it again, would you be so kind to test

[Bug tree-optimization/42027] [4.5 Regression] Performance regression in convolution loop optimization

--- Comment #18 from nbenoit at tuxfamily dot org 2009-12-17 09:34 --- (In reply to comment #17) (In reply to comment #16) Created an attachment (id=19332) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19332action=view) [edit] Real fix Now, before I blow it again, would

[Bug tree-optimization/42027] [4.5 Regression] Performance regression in convolution loop optimization

--- Comment #8 from nbenoit at tuxfamily dot org 2009-12-16 10:34 --- I am confused, a performance regression is still noticeable: * Intel Xeon E5320 (x86_64 arch but gcc machine is i686-pc-linux-gnu), with -O1 flag GCC-4.4.2 7364 ms GCC-trunk-r155286 9515 ms * Intel Xeon

[Bug tree-optimization/42027] [4.5 Regression] Performance regression in convolution loop optimization

--- Comment #9 from nbenoit at tuxfamily dot org 2009-12-16 11:06 --- Here is a unified diff which focuses on the inner-loop exit conditions. --- 442/convol.s +++ r155286/convol.s .L3: movl(%edx), %ebx - imull (%esi,%eax,4), %ebx + imull H(,%eax,4), %ebx

[Bug tree-optimization/42027] [4.5 Regression] Performance regression in convolution loop optimization

--- Comment #11 from nbenoit at tuxfamily dot org 2009-12-16 12:53 --- The fastest is the variant with more jumps (442/convol.s in the diff) generated by GCC-4.4.2. In the one jump variant (r155286/convol.s in the diff), I guess it is the computing of both conditions before jumping

[Bug tree-optimization/42027] [4.5 Regression] Performance regression in convolution loop optimization

--- Comment #12 from nbenoit at tuxfamily dot org 2009-12-16 12:55 --- Created an attachment (id=19321) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19321action=view) Diff of the RTL expand dump between revisions 151079 and 151080 -- http://gcc.gnu.org/bugzilla/show_bug.cgi

[Bug tree-optimization/42027] [4.5 Regression] Performance regression in convolution loop optimization

--- Comment #4 from nbenoit at tuxfamily dot org 2009-12-01 10:11 --- It seems that this regression first appeared with revision 151080 * with -O1 GCC-4.4.2 7.4 s GCC-trunk-r151078 7.4 s GCC-trunk-r151079 7.4 s GCC-trunk-r151080 9.4 s GCC-trunk-r151081 9.4 s GCC-trunk

[Bug tree-optimization/42027] [4.5 Regression] Performance regression in convolution loop optimization

--- Comment #3 from nbenoit at tuxfamily dot org 2009-11-26 15:08 --- Using integer instead of double, the performance difference is even more noticeable : * with -O1 GCC 4.4.2 7475 ms GCC-trunk-r154672 9390 ms -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id

[Bug tree-optimization/42027] New: Performance regression in convolution loop optimization

AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: nbenoit at tuxfamily dot org GCC build triplet: i686-pc-linux-gnu GCC host triplet: i686-pc-linux-gnu GCC target triplet: i686-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42027

[Bug tree-optimization/42027] Performance regression in convolution loop optimization

--- Comment #1 from nbenoit at tuxfamily dot org 2009-11-13 09:51 --- Created an attachment (id=19010) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19010action=view) Source file with a convolution loop pattern. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42027