[Bug c/42956] New: internal compiler error: Segmentation fault with -O1

[Bug c/42956] New: internal compiler error: Segmentation fault with -O1

[peb at mppmu dot mpg dot de]

When building Cuba-1.6 (http://www.feynarts.de/cuba/Cuba-1.6.tar.gz)
via configure && make, there is an internal compiler error (segmentation fault)
in the compilation of Divonne.c.  This may or may not be related to #41155.

gcc says:
gcc-4.4.3 -O3 -fomit-frame-pointer -ffast-math -DHAVE_CONFIG_H
-I../Cuba-1.6/src/common -I. -I../Cuba-1.6 -I../Cuba-1.6/src/divonne -c -o
Divonne.o ../Cuba-1.6/src/divonne/Divonne.c
In file included from ../Cuba-1.6/src/divonne/common.c:19,
                 from ../Cuba-1.6/src/divonne/Divonne.c:41:
../Cuba-1.6/src/divonne/Split.c: In function 'Split':
../Cuba-1.6/src/divonne/Split.c:275: internal compiler error: Segmentation
fault

This error occurs for gcc-4.4.3 with -O3, -O2, and -O1 but neither with -O0 nor
for gcc-4.4.2


-- 
           Summary: internal compiler error: Segmentation fault with -O1
           Product: gcc
           Version: 4.4.3
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: peb at mppmu dot mpg dot de
 GCC build triplet: i686-linux-gnu
  GCC host triplet: i686-linux-gnu
GCC target triplet: i686-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug c/42956] internal compiler error: Segmentation fault with -O1

[peb at mppmu dot mpg dot de]

------- Comment #2 from peb at mppmu dot mpg dot de  2010-02-04 14:27 -------
Created an attachment (id=19804)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19804&action=view)
preprocessed source


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug c/42956] internal compiler error: Segmentation fault with -O1

[paolo dot carlini at oracle dot com]

------- Comment #1 from paolo dot carlini at oracle dot com  2010-02-04 14:26 -------
Please follow the instructions here

  http://gcc.gnu.org/bugs/#report

provide a preprocessed file. Thanks.


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug c/42956] internal compiler error: Segmentation fault with -O1

[paolo dot carlini at oracle dot com]

-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-02-04 14:30:49
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4/4.5 Regression] internal compiler error: Segmentation fault with -O1

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2010-02-04 15:44 -------
Confirmed at -O2.  Reducing.

../Cuba-1.6/src/divonne/Split.c: In function 'Split':
../Cuba-1.6/src/divonne/Split.c:275:13: error: expected an SSA_NAME object
../Cuba-1.6/src/divonne/Split.c:275:13: error: in statement
D.15203_353 = D.8489 /[ex] 8;
../Cuba-1.6/src/divonne/Split.c:275:13: 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.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |tree-optimization
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |4.4.3 4.5.0
      Known to work|                            |4.3.5 4.4.2
            Summary|internal compiler error:    |[4.4/4.5 Regression]
                   |Segmentation fault with -O1 |internal compiler error:
                   |                            |Segmentation fault with -O1
   Target Milestone|---                         |4.4.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4/4.5 Regression] internal compiler error: Segmentation fault with -O1

[rguenth at gcc dot gnu dot org]

------- Comment #4 from rguenth at gcc dot gnu dot org  2010-02-04 15:54 -------
typedef const int cint;
typedef struct {
} Bounds;
int ndim_, ncomp_, selectedcomp_, nregions_;
void *voidregion_;
typedef struct {
    double diff, err, spread;
} Errors;
typedef const Errors cErrors;
void Split(int iregion, int depth, int xregion)
{
  typedef struct {
      double avg, err, spread, chisq;
      double xmin[ndim_], xmax[ndim_];
  } Result;
  typedef struct region {
      Result result[ncomp_];
  } Region;
  Errors errors[ncomp_];
  int comp, ireg, xreg;
  double tmp;
  for( ireg = iregion, xreg = xregion; ireg < nregions_; ireg = xreg++ )
    {
      Result *result = ((Region *)voidregion_)[ireg].result;
      for( comp = 0; comp < ncomp_; ++comp )
        {
          Result *r = &result[comp];
          cErrors *e = &errors[comp];
          double c = tmp*e->diff;
          if( r->err > 0 ) r->err = r->err*e->err + c;
        }
    }
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4/4.5 Regression] internal compiler error: Segmentation fault with -O1

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2010-02-05 14:59 -------
Mine.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rguenth at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2010-02-04 14:30:49         |2010-02-05 14:59:04
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4 Regression] internal compiler error: Segmentation fault with -O1

[rguenth at gcc dot gnu dot org]

------- Comment #7 from rguenth at gcc dot gnu dot org  2010-02-07 13:43 -------
Fixed for 4.5.0 sofar.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.4.3 4.5.0                 |4.4.3
      Known to work|4.3.5 4.4.2                 |4.3.5 4.4.2 4.5.0
            Summary|[4.4/4.5 Regression]        |[4.4 Regression] internal
                   |internal compiler error:    |compiler error: Segmentation
                   |Segmentation fault with -O1 |fault with -O1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4/4.5 Regression] internal compiler error: Segmentation fault with -O1

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2010-02-07 13:43 -------
Subject: Bug 42956

Author: rguenth
Date: Sun Feb  7 13:42:52 2010
New Revision: 156571

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=156571
Log:
2010-02-07  Richard Guenther  <rguenther@suse.de>

        PR middle-end/42956
        * gimplify.c (gimple_fold_indirect_ref): Avoid generating
        new ARRAY_REFs on variable size element or minimal index arrays.
        Complete.
        * tree-ssa-loop-ivopts.c (find_interesting_uses_address): Use
        gimple_fold_indirect_ref.

        * gcc.c-torture/compile/pr42956.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr42956.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimplify.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4 Regression] internal compiler error: Segmentation fault with -O1

[rguenth at gcc dot gnu dot org]

------- Comment #8 from rguenth at gcc dot gnu dot org  2010-02-07 13:43 -------
P1 for a regression on a release branch.


-- 

rguenth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4 Regression] internal compiler error: Segmentation fault with -O1

[steven at gcc dot gnu dot org]

------- Comment #9 from steven at gcc dot gnu dot org  2010-03-21 14:35 -------
Still needs to be applied to GCC 4.4.


-- 

steven at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4 Regression] internal compiler error: Segmentation fault with -O1

[rguenth at gcc dot gnu dot org]

------- Comment #10 from rguenth at gcc dot gnu dot org  2010-04-01 13:20 -------
The "Complete." part shouldn't be backported.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4 Regression] internal compiler error: Segmentation fault with -O1

[rguenth at gcc dot gnu dot org]

------- Comment #11 from rguenth at gcc dot gnu dot org  2010-04-08 11:47 -------
Subject: Bug 42956

Author: rguenth
Date: Thu Apr  8 11:47:13 2010
New Revision: 158123

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=158123
Log:
2010-04-08  Richard Guenther  <rguenther@suse.de>

        PR middle-end/42956
        * gimplify.c (gimple_fold_indirect_ref): Avoid generating
        new ARRAY_REFs on variable size element or minimal index arrays.
        * tree-ssa-loop-ivopts.c (find_interesting_uses_address): Use
        gimple_fold_indirect_ref.

        * gcc.c-torture/compile/pr42956.c: New testcase.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr42956.c
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/gimplify.c
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_4-branch/gcc/tree-ssa-loop-ivopts.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956

[Bug tree-optimization/42956] [4.4 Regression] internal compiler error: Segmentation fault with -O1

[rguenth at gcc dot gnu dot org]

------- Comment #12 from rguenth at gcc dot gnu dot org  2010-04-08 11:47 -------
Fixed.


-- 

rguenth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42956