[Bug middle-end/61396] [4.10 regression] ICE in simplify_immed_subreg

[Bug middle-end/61396] [4.10 regression] ICE in simplify_immed_subreg

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61396

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.10.0

[Bug middle-end/61396] New: [4.10 regression] ICE in simplify_immed_subreg

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61396

            Bug ID: 61396
           Summary: [4.10 regression] ICE in simplify_immed_subreg
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: zadeck at gcc dot gnu.org
            Target: powerpc-*-*

$ gcc/xgcc -B gcc/ -O2 -maltivec -m32 -S ../gcc/gcc/testsuite/gcc.dg/pr34856.c
../gcc/gcc/testsuite/gcc.dg/pr34856.c: In function ‘f1’:
../gcc/gcc/testsuite/gcc.dg/pr34856.c:29:1: internal compiler error: in
simplify_immed_subreg, at simplify-rtx.c:5333
 }
 ^
0x9af2ab simplify_immed_subreg
        ../../gcc/gcc/simplify-rtx.c:5333
0xdc82ae equiv_constant
        ../../gcc/gcc/cse.c:3814
0xdc89b4 fold_rtx
        ../../gcc/gcc/cse.c:3132
0xdcafc3 cse_insn
        ../../gcc/gcc/cse.c:4602
0xdcff3b cse_extended_basic_block
        ../../gcc/gcc/cse.c:6451
0xdcff3b cse_main
        ../../gcc/gcc/cse.c:6629
0xdd0456 rest_of_handle_cse
        ../../gcc/gcc/cse.c:7474
0xdd0456 execute
        ../../gcc/gcc/cse.c:7518

219f324690529d5ca26ae2081aaee8209132005d is the first bad commit
commit 219f324690529d5ca26ae2081aaee8209132005d
Author: zadeck <zadeck@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Wed Oct 16 16:00:03 2013 +0000

    made rs6000 port support CONST_WIDE_INT

    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/wide-int@203710
138bc75d-0d04-0410-961f-82ee72b054a4

Breakpoint 5, simplify_immed_subreg (outermode=V16QImode, op=0x3fffb78056f0, 
    innermode=V4SImode, byte=0) at ../../gcc/simplify-rtx.c:5179
5179      rtvec result_v = NULL;
(gdb) p op
$1 = (rtx) 0x3fffb78056f0
(gdb) pr
(const_vector:V4SI [
        (const:SI (plus:SI (symbol_ref:SI ("g") [flags 0xc0] <var_decl
0x3fffb76baa18 g>)
                (const_int 32 [0x20])))
        (const_int 0 [0])
        (const_int 0 [0])
        (const_int 0 [0])
    ])
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/61397] [4.10 regression] FAIL: gcc.target/powerpc/p8vector-ldst.c scan-assembler lxsdx
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ida397

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.10.0

[Bug middle-end/61396] [4.10 regression] ICE in simplify_immed_subreg

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61396

Iain Sandoe <iains at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dominiq at lps dot ens.fr

--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
*** Bug 61589 has been marked as a duplicate of this bug. ***

[Bug middle-end/61396] [4.10 regression] ICE in simplify_immed_subreg

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61396

--- Comment #3 from Iain Sandoe <iains at gcc dot gnu.org> ---
notes that Dominique added to the dup:

Revision r209530 is OK, r210534 is not, likely a wide-int fallout.

(of course, it could be latent-revealed-by, but would be good for a wide-int
person to take a look)

[Bug target/61396] [4.10 regression] ICE in simplify_immed_subreg

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61396

Segher Boessenkool <segher at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |segher at gcc dot gnu.org
          Component|middle-end                  |target
           Assignee|unassigned at gcc dot gnu.org      |segher at gcc dot gnu.org

--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It's a target problem.  I have a patch.

[Bug target/61396] [4.10 regression] ICE in simplify_immed_subreg

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61396

Segher Boessenkool <segher at gcc dot gnu.org> changed:

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

--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed.

[Bug target/61396] [4.10 regression] ICE in simplify_immed_subreg

[mikestump at comcast dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61396

--- Comment #7 from Mike Stump <mikestump at comcast dot net> ---
So when you compose the svn comments, compose them from a cut and paste of sed
20q ChangeLog, exactly.  In this case, you did this:

rs6000: fix for PR61396 (wide-int fallout)

CONSTANT_P is true for more than just all kinds of constant number.
This patch undoes that part of the wide-int patches.

but the ChangeLog was like this:

    PR target/61396
    * config/rs6000/rs6000.c (paired_expand_vector_init): Only allow
    constant numbers, not general constants.
    (rs6000_expand_vector_init): Ditto.

You used to do this, but stopped.  The problem with how you are doing it is
that the svn bugzilla integration actually looks for the PR target/ line and
links the change in svn into bugzilla.  Without that, no link.   Thanks.