[Bug c/42234] New: internal compiler error: verify_ssa failed

[Bug c/42234] New: internal compiler error: verify_ssa failed

[chenyang at cs dot utah dot edu]

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Seems that "-g" triggers this problem. See the detail below:

yang@yang-working:~$ svngcc -Os -g -o small small.c
small.c: In function ‘main’:
small.c:34:1: error: definition in block 5 does not dominate use in block 6
for SSA_NAME: l_103_1 in statement:
# DEBUG l_103 => l_103_1
small.c:34:1: 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.
yang@yang-working:~$ cat small.c
#include <stdint.h>

struct S0 {
  int f0;
};

int g_15 = 1;
int * g_19 = (&g_15);
int * g_46 = (&g_15);

static int
foo(int si1, int si2)
{
   return (si1 > si2) ? si1 : si2;
}

int main(void)
{
   struct S0 l_93 = {1};
   int l_103 = 1;
   if(foo(0, (g_46 != g_19)))
   {
       l_103 = g_15 && l_93.f0;
   }
   else
   {
       for (l_103 = 0; l_103 <= 3; l_103--)
       {
           g_15 = 1;
       }
   }
   l_103++;
   return 0;
}
yang@yang-working:~$ svngcc -v
Using built-in specs.
COLLECT_GCC=svngcc
COLLECT_LTO_WRAPPER=/home/yang/compilers/libexec/gcc/i686-pc-linux-gnu/4.5.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../configure --enable-lto --prefix=/home/yang/compilers
--program-prefix=svn --enable-languages=c,c++
--with-libelf=/home/yang/compilers : (reconfigured) ../configure --enable-lto
--prefix=/home/yang/compilers --program-prefix=svn
--with-libelf=/home/yang/compilers --enable-languages=c,lto,c++ --no-create
--no-recursion : (reconfigured) ../configure --enable-lto
--prefix=/home/yang/compilers --program-prefix=svn
--with-libelf=/home/yang/compilers --enable-languages=c,c++,lto --no-create
--no-recursion : (reconfigured) ../configure --enable-lto
--prefix=/home/yang/compilers --program-prefix=svn
--with-libelf=/home/yang/compilers --enable-languages=c,c++,lto --no-create
--no-recursion : (reconfigured) ../configure --enable-lto
--prefix=/home/yang/compilers --program-prefix=svn
--with-libelf=/home/yang/compilers --enable-languages=c,c++,lto --no-create
--no-recursion : (reconfigured) ../configure --enable-lto
--prefix=/home/yang/compilers --program-prefix=svn
--with-libelf=/home/yang/compilers --enable-languages=c,c++,lto --no-create
--no-recursion : (reconfigured) ../configure --enable-lto
--prefix=/home/yang/compilers --program-prefix=svn
--with-libelf=/home/yang/compilers --enable-languages=c,c++,lto --no-create
--no-recursion : (reconfigured) ../configure --enable-lto
--prefix=/home/yang/compilers --program-prefix=svn
--with-libelf=/home/yang/compilers --enable-languages=c,c++,lto --no-create
--no-recursion
Thread model: posix
gcc version 4.5.0 20091130 (experimental) (GCC)


-- 
           Summary: internal compiler error: verify_ssa failed
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: chenyang at cs dot utah dot edu
 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=42234

[Bug debug/42234] [4.5 Regression] internal compiler error: verify_ssa failed

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|internal compiler error:    |[4.5 Regression] internal
                   |verify_ssa failed           |compiler error: verify_ssa
                   |                            |failed
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42234

[Bug debug/42234] [4.5 Regression] internal compiler error: verify_ssa failed

[jakub at gcc dot gnu dot org]

------- Comment #1 from jakub at gcc dot gnu dot org  2009-12-01 08:19 -------
Simplified testcase without the undefined signed underflow:
void
foo (int x)
{
  struct S { int s; } d = { 1 };
  unsigned int e = 1;
  if (x)
    e = x && d.s;
  else
    for (e = 0; e <= 3; e--)
      ;
  e++;
}

The problem starts in *.cddce1, before that we have:
  # e_2 = PHI <e_9(6), e_1(8)>
  # DEBUG e => e_2
  # DEBUG e => e_2 + 1
but after that only:
<bb 6>:
  # DEBUG e => e_1
  # DEBUG e => e_1 + 1
where e_1 is defined only in one of the predecessors of bb 6.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-12-01 08:19:33
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42234

[Bug debug/42234] [4.5 Regression] internal compiler error: verify_ssa failed

[jakub at gcc dot gnu dot org]

------- Comment #2 from jakub at gcc dot gnu dot org  2009-12-01 19:42 -------
Subject: Bug 42234

Author: jakub
Date: Tue Dec  1 19:41:52 2009
New Revision: 154878

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=154878
Log:
        PR c++/42234
        * tree-cfgcleanup.c (cleanup_omp_return): Don't ICE if control_bb
        contains no statements.

        * g++.dg/gomp/pr42234.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/gomp/pr42234.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-cfgcleanup.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42234

[Bug debug/42234] [4.5 Regression] internal compiler error: verify_ssa failed

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2009-12-01 19:44 -------
Subject: Bug 42234

Author: jakub
Date: Tue Dec  1 19:44:34 2009
New Revision: 154879

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=154879
Log:
        PR c++/42234
        * tree-cfgcleanup.c (cleanup_omp_return): Don't ICE if control_bb
        contains no statements.

        * g++.dg/gomp/pr42234.C: New test.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/gomp/pr42234.C
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_4-branch/gcc/tree-cfgcleanup.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42234

[Bug debug/42234] [4.5 Regression] internal compiler error: verify_ssa failed

[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=42234

[Bug debug/42234] [4.5 Regression] internal compiler error: verify_ssa failed

[rth at gcc dot gnu dot org]

-- 

rth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rth at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-12-01 08:19:33         |2009-12-02 22:44:49
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42234

[Bug debug/42234] [4.5 Regression] internal compiler error: verify_ssa failed

[rth at gcc dot gnu dot org]

------- Comment #4 from rth at gcc dot gnu dot org  2009-12-07 00:00 -------
Subject: Bug 42234

Author: rth
Date: Sun Dec  6 23:59:52 2009
New Revision: 155025

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155025
Log:
        PR debug/42234
        * tree-ssa-dom.c (degenerate_phi_result): Check for NULL phi
        argument earlier.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr42234.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-dom.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42234

[Bug debug/42234] [4.5 Regression] internal compiler error: verify_ssa failed

[rth at gcc dot gnu dot org]

------- Comment #5 from rth at gcc dot gnu dot org  2009-12-07 00:53 -------
Fixed.


-- 

rth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42234

[Bug debug/42234] [4.5 Regression] internal compiler error: verify_ssa failed

[hjl at gcc dot gnu dot org]

------- Comment #6 from hjl at gcc dot gnu dot org  2009-12-12 01:45 -------
Subject: Bug 42234

Author: hjl
Date: Sat Dec 12 01:45:12 2009
New Revision: 155191

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155191
Log:
Backport testcases from trunk.

2009-12-11  H.J. Lu  <hongjiu.lu@intel.com>

        Backport from mainline:
        2009-12-07  Richard Henderson  <rth@redhat.com>

        PR rtl-opt/42269
        * gcc.c-torture/execute/pr42269-2.c: New.

        2009-12-07  Richard Henderson  <rth@redhat.com>

        PR debug/42299
        PR debug/42166
        * gcc.c-torture/compile/pr42299.c: New.
        * gfortran.dg/pr42166.f90: Likewise.

        2009-12-06  Richard Henderson  <rth@redhat.com>

        PR debug/42234
        * gcc.c-torture/compile/pr42234.c: New.

        2009-12-02  Richard Henderson  <rth@redhat.com>

        PR tree-opt/42215
        * gcc.dg/pr42215.c: New.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr42234.c
      - copied unchanged from r155190,
trunk/gcc/testsuite/gcc.c-torture/compile/pr42234.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr42299.c
      - copied unchanged from r155190,
trunk/gcc/testsuite/gcc.c-torture/compile/pr42299.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/execute/pr42269-2.c
      - copied unchanged from r155190,
trunk/gcc/testsuite/gcc.c-torture/execute/pr42269-2.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/pr42215.c
      - copied unchanged from r155190, trunk/gcc/testsuite/gcc.dg/pr42215.c
    branches/gcc-4_4-branch/gcc/testsuite/gfortran.dg/pr42166.f90
      - copied unchanged from r155190,
trunk/gcc/testsuite/gfortran.dg/pr42166.f90
Modified:
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42234