[Bug tree-optimization/57497] New: ICE in lra_create_new_reg_with_unique_value, at lra.c:155

[Bug tree-optimization/57497] New: ICE in lra_create_new_reg_with_unique_value, at lra.c:155

[antoine.balestrat at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57497

            Bug ID: 57497
           Summary: ICE in lra_create_new_reg_with_unique_value, at
                    lra.c:155
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: antoine.balestrat at gmail dot com

Hello !
The following testcase makes GCC 4.9.0 as of 20130601 ICE at -O3.

$ cat lra.c
int a, b;

void f(void)
{
    for(;; a++)
        if(0)
        {
            int *q;
lbl1:
            ;
            char **p = 0;
lbl2:
            while(**p)
                1 & **p ? : (b = 0);
            p = &q;
        }

        else
        {
            long **t, c = 2200000000;

            if(b)
            {
                *t = &c;
                goto lbl1;
            }

            goto lbl2;
        }
}

$ xgcc -O3 -w lra.c
lra.c: In function ‘f’:
lra.c:30:1: internal compiler error: in lra_create_new_reg_with_unique_value,
at 
lra.c:155
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
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Subject: [Bug fortran/57496] I/O: WRITE(*,*) HUGE(0_16) [REAL(10)+REAL(16)]: Gives SIGFPE with -ffpe-trap=overflow
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idW496

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #0)
> +       sign_bit = SIGNBIT (x,tmp);\
> +       if (!ISFINITE (x,tmp))\
> +           write_infnan (dtp, f, ISNAN (x,tmp), sign_bit);\

I was too hasty: It should be "y," not "x," in the lines above.

[Bug rtl-optimization/57497] [4.9 Regression] ICE in lra_create_new_reg_with_unique_value, at lra.c:155

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57497

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-*
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-06-03
      Known to work|                            |4.8.1
   Target Milestone|---                         |4.9.0
            Summary|ICE in                      |[4.9 Regression] ICE in
                   |lra_create_new_reg_with_uni |lra_create_new_reg_with_uni
                   |que_value, at  lra.c:155    |que_value, at  lra.c:155
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.

[Bug rtl-optimization/57497] [4.9 Regression] ICE in lra_create_new_reg_with_unique_value, at lra.c:155

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57497

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org,
                   |                            |vmakarov at gcc dot gnu.org

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with http://gcc.gnu.org/r199298

[Bug rtl-optimization/57497] [4.9 Regression] ICE in lra_create_new_reg_with_unique_value, at lra.c:155

[antoine.balestrat at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57497

--- Comment #3 from Antoine Balestrat <antoine.balestrat at gmail dot com> ---
This bug looks unreproducible with the current trunk.

[Bug rtl-optimization/57497] [4.9 Regression] ICE in lra_create_new_reg_with_unique_value, at lra.c:155

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57497

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

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

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Assuming fixed.