middle-end/10510: [3.3 regression] 20020227-1.c:30: interna compiler error: in reload, at reload1.c:1108 on hppa64-hp-hpux11.11

middle-end/10510: [3.3 regression] 20020227-1.c:30: interna compiler error: in reload, at reload1.c:1108 on hppa64-hp-hpux11.11

[dave.anglin]

>Number:         10510
>Category:       middle-end
>Synopsis:       [3.3 regression] 20020227-1.c:30: interna compiler error: in reload, at reload1.c:1108 on hppa64-hp-hpux11.11
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Sun Apr 27 01:16:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Dave Anglin
>Release:        gcc version 3.3 20030426 (prerelease)
>Organization:
>Environment:
hppa64-hp-hpux11.11
>Description:
At -O1 and above, the following ICE occurs:

/xxx/gnu/gcc-3.3/gcc/gcc/testsuite/gcc.c-torture/execute/20020227-1.c: In functi
on `f2':
/xxx/gnu/gcc-3.3/gcc/gcc/testsuite/gcc.c-torture/execute/20020227-1.c:30: intern
al compiler error: in reload, at reload1.c:1108
Please submit a full bug report,

I suspect that this is caused by this patch:

Fri Apr 25 15:43:23 CEST 2003  Jan Hubicka  <jh@suse.cz>

        * emit-rtl.c (subreg_hard_regno):  Check that register is
        representable.
        * reload.c (reload_inner_reg_of_subreg):  When register is not
        representable, reload the whole thing.
        (find_reloads): Likewsie.
        * rtlanal.c (subreg_representable_p):  New function.

There are two calls to find_reloads similar to the following:

Breakpoint 4, find_reloads (insn=0x800003fffee1c540, replace=0, ind_levels=0,
    live_known=0, reload_reg_p=0x294) at ../../gcc/gcc/reload.c:2512
2512      rtx set = single_set (insn);
(gdb) p debug_rtx (insn)
(insn 40 39 41 0 0000000000000000 (set (reg:SF 51 %fr23 [68])
        (subreg:SF (reg:DI 20 %r20 [99]) 0)) 121 {*pa.md:3418} (insn_list 39 (ni
l))
    (nil))
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: