------- Comment #5 from dberlin at gcc dot gnu dot org 2006-05-02 12:19 -------
Subject: Re: [4.2 Regression] ICE:
add_virtual_operand with pointers to arrays
On Tue, 2006-05-02 at 08:56 +0000, rguenth at gcc dot gnu dot org wrote:
>
> ------- Comment #4 from rguenth at gcc dot gnu dot org 2006-05-02 08:56
> -------
> ICEing in the propagator engine during copyprop:
>
> Substituing values and folding statements
>
> Folded statement: tt_19 = &D.1547_18->cg;
> into: tt_19 = &D.1547_12->cg;
>
> *kaboom*
>
> but same usual place:
>
> #1 0x081881af in add_virtual_operand (var=0xb7d8e410, s_ann=0xb7e1a7ec,
> flags=1, full_ref=0xb7e1a208, offset=32, size=32, for_clobber=0 '\0')
> at /space/rguenther/src/svn/trunk/gcc/tree-ssa-operands.c:1284
> 1284 gcc_assert (SMT_USED_ALONE (var));
>
> (gdb) call debug_generic_expr(stmt)
> # SMT.8D.1563_39 = V_MAY_DEF <SMT.8D.1563_14>;
> D.1547_12->cgD.1522[D.1552_21] = uD.1532_16
This is a different bug, in fact.
Those two (D.1547_18 and D.1547_12) should have had the exact same SMT
base, AFAICT, and thus, should have had the same result.
What do the alias dumps look like after the patch from 26626?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27373
