Re: [Bug rtl-optimization/37408] New: [4.3/4.4 regression] Invalid insn scheduling

[Andrew Thomas Pinski <pinskia at gmail dot com>]

Sent from my iPhone

On Sep 7, 2008, at 9:47, "schwab at suse dot de" <gcc-bugzilla@gcc.gnu.org 
> wrote:

> This is broken during sched2 pass.  Compiled with -m64 -O2.
>
>        lwz 10,1492(7)   # nargs,            <--- uninitialized
>        std 9,1272(7)    # specpdl.19,
>        li 9,16  # iftmp.21,
>        std 3,1488(7)    # nargs, nargs
>        std 4,1496(7)    # args, args
>        cmpwi 7,10,3     #, tmp307,

Just looking at the assembler suggest an aliasing issue. I had a quick  
look at the code but I did see anything would give an alaising issue.  
Though there were some unions.

> --
>           Summary: [4.3/4.4 regression] Invalid insn scheduling
>           Product: gcc
>           Version: 4.3.1
>            Status: UNCONFIRMED
>          Keywords: wrong-code
>          Severity: normal
>          Priority: P3
>         Component: rtl-optimization
>        AssignedTo: unassigned at gcc dot gnu dot org
>        ReportedBy: schwab at suse dot de
> GCC target triplet: powerpc64-*-*
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37408