[Bug middle-end/35085] [4.3 Regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-06 Thread ismail at pardus dot org dot tr 


--- Comment #9 from ismail at pardus dot org dot tr  2008-02-06 09:34 
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CC'ing Dorit to get his idea on the vectorizer dump.


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ismail at pardus dot org dot tr changed:

   What|Removed |Added

 CC||dorit at il dot ibm dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 Regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-06 Thread ubizjak at gmail dot com 


--- Comment #10 from ubizjak at gmail dot com  2008-02-06 13:32 ---
I have noticed, that following text is missing from your vect dump:

Dependence tester statistics:
Number of dependence tests: 0
Number of dependence tests classified dependent: 0
Number of dependence tests classified independent: 0
Number of undetermined dependence tests: 0
Number of subscript tests: 0
Number of undetermined subscript tests: 0
Number of same subscript function: 0
Number of ziv tests: 0
Number of ziv tests returning dependent: 0
Number of ziv tests returning independent: 0
Number of ziv tests unimplemented: 0
Number of siv tests: 0
Number of siv tests returning dependent: 0
Number of siv tests returning independent: 0
Number of siv tests unimplemented: 0
Number of miv tests: 0
Number of miv tests returning dependent: 0
Number of miv tests returning independent: 0
Number of miv tests unimplemented: 0


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 Regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-06 Thread ismail at pardus dot org dot tr 


--- Comment #11 from ismail at pardus dot org dot tr  2008-02-06 13:33 
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(In reply to comment #10)
 I have noticed, that following text is missing from your vect dump:
 
 Dependence tester statistics:
 Number of dependence tests: 0
 Number of dependence tests classified dependent: 0
 Number of dependence tests classified independent: 0
 Number of undetermined dependence tests: 0
 Number of subscript tests: 0
 Number of undetermined subscript tests: 0
 Number of same subscript function: 0
 Number of ziv tests: 0
 Number of ziv tests returning dependent: 0
 Number of ziv tests returning independent: 0
 Number of ziv tests unimplemented: 0
 Number of siv tests: 0
 Number of siv tests returning dependent: 0
 Number of siv tests returning independent: 0
 Number of siv tests unimplemented: 0
 Number of miv tests: 0
 Number of miv tests returning dependent: 0
 Number of miv tests returning independent: 0
 Number of miv tests unimplemented: 0

I don't why but I didn't modify the vector dump :/


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 Regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-06 Thread ubizjak at gmail dot com 


--- Comment #12 from ubizjak at gmail dot com  2008-02-06 14:02 ---
(In reply to comment #11)
 (In reply to comment #10)
  I have noticed, that following text is missing from your vect dump:

 I don't why but I didn't modify the vector dump :/

Eh, my dump was produced with -fdump-tree-vect-all.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 Regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-06 Thread ubizjak at gmail dot com 


--- Comment #13 from ubizjak at gmail dot com  2008-02-06 14:11 ---
I think that following difference is the key:

In case vectorizer is able to vecotrize, we enter vectorizer pass with:

bb 3:
  # ivtmp.17_1 = PHI ivtmp.17_2(4), 26(2)
  # i_18 = PHI i_10(4), 0(2)
  # s_17 = PHI s_9(4), X_3(D)(2)
  D.2002_7 = a[i_18];
  D.2003_8 = i_18 + D.2002_7;
  s_9 = D.2003_8 + s_17;
  i_10 = i_18 + 1;
  ivtmp.17_2 = ivtmp.17_1 - 1;
  if (ivtmp.17_2 != 0)
goto bb 4;
  else
goto bb 5;

and in case vectorizer is not able to vectorize (your case):

bb 3:
  # ivtmp.17_1 = PHI ivtmp.17_2(4), 26(2)
  # s_18 = PHI s_9(4), X_3(D)(2)
  # i_17 = PHI i_10(4), 0(2)
  D.2020_7 = a[i_17];
  D.2021_8 = s_18 + i_17;
  s_9 = D.2021_8 + D.2020_7;
  i_10 = i_17 + 1;
  ivtmp.17_2 = ivtmp.17_1 - 1;
  if (ivtmp.17_2 != 0)
goto bb 4;
  else
goto bb 5;

In success case, we have:

vect-iv-9.c:15: note: detected reduction:D.2003_8 + s_17
vect-iv-9.c:15: note: Detected reduction.

in your case, vectorizer chokes with:

vect-iv-9.c:15: note: reduction: unknown pattern.D.2021_8 + D.2020_7

I don't know, why there is a difference between my and your tree dump...


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 Regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-06 Thread ismail at pardus dot org dot tr 


--- Comment #14 from ismail at pardus dot org dot tr  2008-02-06 17:01 
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I tried building without BOOT_CFLAGS and such but no luck.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-05 Thread rguenth at gcc dot gnu dot org 


--- Comment #1 from rguenth at gcc dot gnu dot org  2008-02-05 10:19 ---
Works for me.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-05 Thread ismail at pardus dot org dot tr 


--- Comment #2 from ismail at pardus dot org dot tr  2008-02-05 10:21 
---
I bootstrapped twice and still get it. I will try svn up, reboot the machine
etc *sigh*


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-05 Thread ismail at pardus dot org dot tr 


--- Comment #3 from ismail at pardus dot org dot tr  2008-02-05 11:53 
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Ok on a third bootstrap I can still reproduce, is there a way to debug it?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-05 Thread rguenth at gcc dot gnu dot org 


--- Comment #4 from rguenth at gcc dot gnu dot org  2008-02-05 12:35 ---
How does it fail?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 Regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-05 Thread rguenth at gcc dot gnu dot org 


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rguenth at gcc dot gnu dot org changed:

   What|Removed |Added

Summary|[4.3 regression]|[4.3 Regression]
   |gcc.dg/vect/vect-iv-9.c |gcc.dg/vect/vect-iv-9.c
   |fails   |fails
   Target Milestone|--- |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-05 Thread ismail at pardus dot org dot tr 


--- Comment #5 from ismail at pardus dot org dot tr  2008-02-05 12:38 
---
The long only shows:

FAIL: gcc.dg/vect/vect-iv-9.c scan-tree-dump-times vect vectorized 1 loops 2

nothing else.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-05 Thread rguenth at gcc dot gnu dot org 


--- Comment #6 from rguenth at gcc dot gnu dot org  2008-02-05 12:38 ---
does making int a[N]; aligned fix it?  That is

int a[N] __attribute__((aligned(16)));

?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 Regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-05 Thread ismail at pardus dot org dot tr 


--- Comment #7 from ismail at pardus dot org dot tr  2008-02-05 13:20 
---
Adding __attribute__((aligned(16))) doesn't work, attached is the *.vect file.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085

[Bug middle-end/35085] [4.3 Regression] gcc.dg/vect/vect-iv-9.c fails

2008-02-05 Thread ismail at pardus dot org dot tr 


--- Comment #8 from ismail at pardus dot org dot tr  2008-02-05 13:20 
---
Created an attachment (id=15099)
 -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15099action=view)
*.vect file


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35085