[Bug other/52115] New: ICE: verify_ssa failed (missing definition for SSA_NAME)

[Bug other/52115] New: ICE: verify_ssa failed (missing definition for SSA_NAME)

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52115

             Bug #: 52115
           Summary: ICE: verify_ssa failed (missing definition for
                    SSA_NAME)
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gjl@gcc.gnu.org
            Target: avr


This is a new failure observed in 4.7 trunk r183874.  r183341 worked fine.

Source:
./gcc/testsuite/gcc.c-torture/compile/pr44891.c

http://gcc.gnu.org/viewcvs/trunk/gcc/testsuite/gcc.c-torture/compile/pr44891.c?revision=183874&content-type=text%2Fplain&view=co

Command line:

avr-gcc pr44891.c -S -O1 -v

Configured with: ../../gcc.gnu.org/trunk/configure --target=avr
--prefix=/gnu/install/gcc-4.7 --disable-nls --enable-languages=c,c++
--with-dwarf2 --enable-checking=yes,rtl

GNU C (GCC) version 4.7.0 20120203 (experimental) (avr)
        compiled by GNU C version 4.3.2 [gcc-4_3-branch revision 141291], GMP
version 4.3.2, MPFR version 2.4.2, MPC version 0.8.2


ICE:

pr44891.c: In function 'foo':
pr44891.c:26:1: error: missing definition
for SSA_NAME: D.1329_5 in statement:
gf.0_6 = D.1329_5 + 3.2999999523162841796875e+0;
pr44891.c:26:1: internal compiler error: verify_ssa failed

[Bug other/52115] ICE: verify_ssa failed (missing definition for SSA_NAME)

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52115

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-02-03
     Ever Confirmed|0                           |1

[Bug other/52115] ICE: verify_ssa failed (missing definition for SSA_NAME)

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52115

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jamborm at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-02-03 19:43:13 UTC ---
Looks like an ESRA bug.  Can't reproduce on other targets though.

[Bug other/52115] ICE: verify_ssa failed (missing definition for SSA_NAME)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52115

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-06 12:59:23 UTC ---
Mine.

[Bug tree-optimization/52115] [4.7 Regression] ICE: verify_ssa failed (missing definition for SSA_NAME)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52115

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|avr                         |
          Component|other                       |tree-optimization
      Known to work|                            |4.6.2
   Target Milestone|---                         |4.7.0
            Summary|ICE: verify_ssa failed      |[4.7 Regression] ICE:
                   |(missing definition for     |verify_ssa failed (missing
                   |SSA_NAME)                   |definition for SSA_NAME)

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-06 13:08:27 UTC ---
Testcase that fails on x86_64:

struct S
{
  float f;
  long l;
};

extern int gi;
extern float gf;

long foo (long p)
{
  struct S s;
  float *pf;

  s.l = p;

  pf = &s.f;

  pf++;
  pf--;

  gf = *pf + 3.3;
  gi = *((short *)pf) + 2;

  return s.l + 6;
}

I have a patch.

[Bug tree-optimization/52115] [4.7 Regression] ICE: verify_ssa failed (missing definition for SSA_NAME)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52115

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-06 14:54:54 UTC ---
Author: rguenth
Date: Mon Feb  6 14:54:47 2012
New Revision: 183937

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183937
Log:
2012-02-06  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/52115
    * tree-sra.c (access_has_replacements_p): New function.
    (sra_modify_assign): Use it to decide whether a use is uninitialized.

    * gcc.c-torture/compile/pr52115.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr52115.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-sra.c

[Bug tree-optimization/52115] [4.7 Regression] ICE: verify_ssa failed (missing definition for SSA_NAME)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52115

Richard Guenther <rguenth at gcc dot gnu.org> changed:

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

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-06 15:14:46 UTC ---
Fixed.