[Bug tree-optimization/42205] New: [4.5 Regression] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[Bug tree-optimization/42205] New: [4.5 Regression] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[zsojka at seznam dot cz]

gcc trunk r154706
command flags: -O1 -ffast-math -floop-interchange

Running on testcase gives:
/mnt/svn/gcc-trunk/binary-154706-lto/bin/gcc -O1 -ffast-math -floop-interchange
-c testcaseN2-min.i -o tmp.o
testcaseN2-min.i: In function ‘adler32’:
testcaseN2-min.i:1:5: error: definition in block 8 does not dominate use in
block 3
for SSA_NAME: sum_3 in statement:
sum_11 = adler_10 + sum_3;
testcaseN2-min.i:1:5: internal compiler error: verify_ssa failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

r154520 seems to work without any problems

May be a dup of PR42186, PR42166, PR40767 or PR40711 (or some other PR).


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           Summary: [4.5 Regression] internal compiler error: verify_ssa
                    failed with -ffast-math -floop-interchange
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[zsojka at seznam dot cz]

------- Comment #1 from zsojka at seznam dot cz  2009-11-28 06:14 -------
Created an attachment (id=19169)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19169&action=view)
reduced testcase, comes from gcc sources


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[hjl dot tools at gmail dot com]

------- Comment #2 from hjl dot tools at gmail dot com  2009-11-28 08:50 -------
It is caused by revision 154561:

http://gcc.gnu.org/ml/gcc-cvs/2009-11/msg00784.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |spop at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-11-28 08:50:43
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[zsojka at seznam dot cz]

------- Comment #3 from zsojka at seznam dot cz  2009-11-28 22:46 -------
The problem appears with following flags as well:

-O1 -floop-strip-mine -ffast-math


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] [graphite] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] [graphite] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[zsojka at seznam dot cz]

------- Comment #4 from zsojka at seznam dot cz  2009-12-07 18:02 -------
Created an attachment (id=19250)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19250&action=view)
different testcase, this one is using doubles

tested r155020, crashes with:
-O1 -funsafe-math-optimizations -floop-interchange
-O1 -funsafe-math-optimizations -floop-strip-mine
-O1 -funsafe-math-optimizations -floop-block

pr42205-2.c:1:8: internal compiler error: gimple check: expected
gimple_assign(error_mark), have gimple_nop() in gimple_assign_rhs_code, at
gimple.h:1820


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] [graphite] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[zsojka at seznam dot cz]

------- Comment #5 from zsojka at seznam dot cz  2009-12-15 18:41 -------
(In reply to comment #4)
> Created an attachment (id=19250)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19250&action=view) [edit]
> different testcase, this one is using doubles
> 
> tested r155020, crashes with:
> -O1 -funsafe-math-optimizations -floop-interchange
> -O1 -funsafe-math-optimizations -floop-strip-mine
> -O1 -funsafe-math-optimizations -floop-block
> 
> pr42205-2.c:1:8: internal compiler error: gimple check: expected
> gimple_assign(error_mark), have gimple_nop() in gimple_assign_rhs_code, at
> gimple.h:1820
> 

This testcase crashes in r155248, but doesn't crash anymore in r155256 (most
likely a dup of pr42185).

The original testcase (comment #1) still crashes with:
-O1 -funsafe-math-optimizations -fgraphite-identity


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] [graphite] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[spop at gcc dot gnu dot org]

------- Comment #6 from spop at gcc dot gnu dot org  2009-12-18 05:42 -------
Mine.


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spop at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |spop at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-11-28 08:50:43         |2009-12-18 05:42:25
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] [graphite] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[spop at gcc dot gnu dot org]

------- Comment #7 from spop at gcc dot gnu dot org  2009-12-18 06:10 -------
Subject: Bug 42205

Author: spop
Date: Fri Dec 18 06:10:06 2009
New Revision: 155334

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155334
Log:
Fix PR42205.

2009-12-17  Sebastian Pop  <sebastian.pop@amd.com>

        PR middle-end/42205
        * graphite-sese-to-poly.c
(translate_scalar_reduction_to_array_for_stmt):
        Insert the reduction copy in the same block as the phi node.
        (follow_ssa_with_commutative_ops): Handle GIMPLE_NOPs.

        * testsuite/gcc.dg/graphite/pr42205-1.c: New.
        * testsuite/gcc.dg/graphite/pr42205-2.c: New.

Added:
    branches/graphite/gcc/testsuite/gcc.dg/graphite/pr42205-1.c
    branches/graphite/gcc/testsuite/gcc.dg/graphite/pr42205-2.c
Modified:
    branches/graphite/gcc/ChangeLog.graphite
    branches/graphite/gcc/graphite-sese-to-poly.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] [graphite] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[spop at gcc dot gnu dot org]

------- Comment #8 from spop at gcc dot gnu dot org  2009-12-18 06:11 -------
Fixed in the Graphite branch.  Will be committed to trunk after test.


-- 

spop at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] [graphite] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[rguenth at gcc dot gnu dot org]

------- Comment #9 from rguenth at gcc dot gnu dot org  2009-12-18 12:40 -------
Re-open.  Still a 4.5 regression.


-- 

rguenth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] [graphite] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[spop at gcc dot gnu dot org]

------- Comment #10 from spop at gcc dot gnu dot org  2009-12-23 07:50 -------
Subject: Bug 42205

Author: spop
Date: Wed Dec 23 07:50:22 2009
New Revision: 155419

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155419
Log:
Fix PR42205.

2009-12-17  Sebastian Pop  <sebastian.pop@amd.com>

        PR middle-end/42205
        * graphite-sese-to-poly.c
(translate_scalar_reduction_to_array_for_stmt):
        Insert the reduction copy in the same block as the phi node.
        (follow_ssa_with_commutative_ops): Handle GIMPLE_NOPs.

        * testsuite/gcc.dg/graphite/pr42205-1.c: New.
        * testsuite/gcc.dg/graphite/pr42205-2.c: New.

Added:
    trunk/gcc/testsuite/gcc.dg/graphite/pr42205-1.c
    trunk/gcc/testsuite/gcc.dg/graphite/pr42205-2.c
Modified:
    trunk/gcc/ChangeLog.graphite
    trunk/gcc/graphite-sese-to-poly.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205

[Bug tree-optimization/42205] [4.5 Regression] [graphite] internal compiler error: verify_ssa failed with -ffast-math -floop-interchange

[spop at gcc dot gnu dot org]

------- Comment #11 from spop at gcc dot gnu dot org  2009-12-23 07:53 -------
Fixed.


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spop at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42205