Re: Bad code generation on HPPA platform

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Wed, May 7, 2008 at 9:21 AM, Steve Ellcey <sje@cup.hp.com> wrote:
> > From: Peter Bergner <bergner@vnet.ibm.com>
>
>
> >
>  > On Wed, 2008-05-07 at 07:45 -0700, Steve Ellcey wrote:
>  > > I have found that this problem does not occur on the ToT sources and
>  > > that the problem went away with this patch:
>  > >
>  > >   2008-04-07  Peter Bergner  <bergner@vnet.ibm.com>
>  > >
>  > >        PR middle-end/PR28690
>  > >        * rtlanal.c: Update copyright years.
>  > >        (commutative_operand_precedence): Give SYMBOL_REF's the same precedence
>  > >        as REG_POINTER and MEM_POINTER operands.
>  > >        * emit-rtl.c (gen_reg_rtx_and_attrs): New function.
>  > >        (set_reg_attrs_from_value): Call mark_reg_pointer as appropriate.
>  > >        * rtl.h (gen_reg_rtx_and_attrs): Add prototype for new function.
>  > >        * gcse.c: Update copyright years.
>  > >        (pre_delete): Call gen_reg_rtx_and_attrs.
>  > >        (hoist_code): Likewise.
>  > >        (build_store_vectors): Likewise.
>  > >        (delete_store): Likewise.
>  > >        * loop-invariant.c (move_invariant_reg): Likewise.
>  > >        Update copyright years.
>  > >
>  > > I don't know if porting this patch to the 4.3 branch is an option or not
>  > > but it might be the easiest way to fix this problem without having to
>  > > revert Andrew's patch.
>  >
>  > Note that the rtlanal.c:commutative_operand_precedence() hunk was reverted
>  > because it caused some problems on CRIS and was replaced by the following
>  > safer change:
>  >
>  >     http://gcc.gnu.org/ml/gcc-patches/2008-04/msg00693.html
>  >
>  > Peter
>
>  I think that even with that hunk reverted this would fix the SPEC gcc
>  problem.  Unfortunately, I don't think it would fix the other problem I
>  have found which is that SPECint2000/253.perlbmk also fails.  I had
>  hoped that the gcc fix would also fix perl but that doesn't seem to be
>  the case.  With ToT GCC sources the SPEC GCC test passes but the
>  SPEC2000 and SPEC2006 perl tests appear to be going into infinite loops.
>
>  This only seems to be happening on the 64 bit HPPA platform, not on the
>  32 bit one.
>

Hi Steve,

Is your perl test problem the same as

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33383


H.J.