[Bug tree-optimization/56826] [4.9 Regression] Run-fail after r197189.

[Dmitriy.Poterukha at uvoteam dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56826

creeon  changed:

   What|Removed |Added

 CC||Dmitriy.Poterukha at uvoteam 
dot c
   ||om

--- Comment #6 from creeon  ---
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[Bug tree-optimization/56826] [4.9 Regression] Run-fail after r197189.

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56826



Richard Biener  changed:



   What|Removed |Added



 Status|UNCONFIRMED |ASSIGNED

   Last reconfirmed||2013-04-04

 AssignedTo|unassigned at gcc dot   |rguenth at gcc dot gnu.org

   |gnu.org |

   Target Milestone|--- |4.9.0

Summary|Run-fail after r197189. |[4.9 Regression] Run-fail

   ||after r197189.

 Ever Confirmed|0   |1



--- Comment #2 from Richard Biener  2013-04-04 
11:06:58 UTC ---

Confirmed, mine.

[Bug tree-optimization/56826] [4.9 Regression] Run-fail after r197189.

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56826



--- Comment #3 from Richard Biener  2013-04-04 
11:12:56 UTC ---

Testcase:



extern void abort (void);



typedef struct {

int a[3];

int num;

} t1;

t1 B[100];

int A[300];



void __attribute__((noinline,noclone))

bar (int *A, t1 *B, int n)

{

  int i;

  int *a = A;

  for (i=0; i

[Bug tree-optimization/56826] [4.9 Regression] Run-fail after r197189.

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56826



--- Comment #4 from Richard Biener  2013-04-04 
11:41:03 UTC ---

Ok, the bug is that 'ncopies' in vect_build_slp_tree is not computed correctly.

I can trivially incrementally improve it but the ultimate fix is to delay

the checks done for vectorizing SLP loads / stores to after the whole SLP

tree is built and thus all types participating in the SLP are known and we

can compute the final unroll factor (in vect_make_slp_decision).



Thus, I'll push the trivial improvement for now, the real fix will follow

a SLP tree build re-org I am planning for next week anyway.

[Bug tree-optimization/56826] [4.9 Regression] Run-fail after r197189.

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56826



Richard Biener  changed:



   What|Removed |Added



 Status|ASSIGNED|RESOLVED

 Resolution||FIXED



--- Comment #5 from Richard Biener  2013-04-04 
15:07:00 UTC ---

Author: rguenth

Date: Thu Apr  4 15:06:44 2013

New Revision: 197486



URL: http://gcc.gnu.org/viewcvs?rev=197486&root=gcc&view=rev

Log:

2013-04-04  Richard Biener  



PR tree-optimization/56826

* tree-vect-slp.c (vect_build_slp_tree): Compute ncopies

more accurately.



* gcc.dg/vect/pr56826.c: New testcase.

* gcc.dg/vect/O3-pr36098.c: Adjust.



Added:

trunk/gcc/testsuite/gcc.dg/vect/pr56826.c

Modified:

trunk/gcc/ChangeLog

trunk/gcc/testsuite/ChangeLog

trunk/gcc/testsuite/gcc.dg/vect/O3-pr36098.c

trunk/gcc/tree-vect-slp.c