[Bug target/66473] New: ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

[Bug target/66473] New: ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

[andrew.n.senkevich at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

            Bug ID: 66473
           Summary: ICE: in extract_insn, at recog.c:2343 (unrecognizable
                    insn) with -mavx512f
           Product: gcc
           Version: 5.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: andrew.n.senkevich at gmail dot com
  Target Milestone: ---

-bash-4.2$ cat ./test_vlen8.c
#include <immintrin.h>

extern __m512d _ZGVeN8v_func (__m512d);

double func_vlen8 (double x) {
    __m512d mx;
    mx[0] = mx[1] = mx[2] = mx[3] = mx[4] = mx[5] = mx[6] = mx[7] = x;
    __m512d mr = _ZGVeN8v_func (mx);

    return ((double) mr[0]);
}

gcc-5.1.0_install/bin/gcc -c ./test_vlen8.c -mavx512f -O2
./test_vlen8.c: In function ‘func_vlen8’:
./test_vlen8.c:11:1: error: unrecognizable insn:
 }
 ^
(insn 7 6 8 2 (set (reg:QI 94)
        (const_int 128 [0x80])) ./test_vlen8.c:7 -1
     (nil))
./test_vlen8.c:11:1: internal compiler error: in extract_insn, at recog.c:2343
0x965018 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        ../../gcc-5.1.0_src/gcc/rtl-error.c:110
0x965049 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        ../../gcc-5.1.0_src/gcc/rtl-error.c:118
0x935129 extract_insn(rtx_insn*)
        ../../gcc-5.1.0_src/gcc/recog.c:2343
0x7a1c43 instantiate_virtual_regs_in_insn
        ../../gcc-5.1.0_src/gcc/function.c:1598
0x7a1c43 instantiate_virtual_regs
        ../../gcc-5.1.0_src/gcc/function.c:1966
0x7a1c43 execute
        ../../gcc-5.1.0_src/gcc/function.c:2015
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Subject: [Bug c++/66383] [5/6 Regression] ICE in gimplify_expr on this passed in inline initialization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idf383

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Jun  9 14:13:22 2015
New Revision: 224282

URL: https://gcc.gnu.org/viewcvs?rev"4282&root=gcc&view=rev
Log:
        PR c++/66383
        * tree.c (replace_placeholders_r): Handle placeholders for an
        outer object.
        * typeck2.c (store_init_value): Only replace_placeholders for
        objects of class type.

Added:
    trunk/gcc/testsuite/g++.dg/cpp1y/nsdmi-aggr3.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/tree.c
    trunk/gcc/cp/typeck2.c

[Bug target/66473] ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

[ubizjak at gmail dot com]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="UTF-8", Size: 9692 bytes --]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-06-09
   Target Milestone|---                         |5.2
     Ever confirmed|0                           |1

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Confirmed. I have a patch.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 35729
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35729&action=edit
Proposed patch

Patch that fixes the failure.
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Subject: [Bug target/66473] ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
Ops, Kirill is already looking at this.

Kirill, you have much better facilities for testing, do you want to take the
proposed patch from here?
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Subject: [Bug target/66473] ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86
             Status|NEW                         |ASSIGNED
                 CC|                            |ubizjak at gmail dot com
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Subject: [Bug rtl-optimization/66306] ICE in reload
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:

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--- Comment #1 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Created attachment 35730
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id5730&actioníit
Experimental fix

When preparing the operands for using an alternative with swapped operands
reload does not swap the information about match_dups in recog_data.

[Bug target/66473] ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

--- Comment #4 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Sure, I'll report tomorrow.

[Bug target/66473] ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

--- Comment #7 from uros at gcc dot gnu.org ---
Author: uros
Date: Wed Jun 10 18:23:31 2015
New Revision: 224340

URL: https://gcc.gnu.org/viewcvs?rev=224340&root=gcc&view=rev
Log:
        PR target/66473
        * config/i386/i386.c (ix86_expand_vector_set): Use gen_int_mode
        to prepare mask operand for AVX512 modes.

testsuite/ChangeLog:

        PR target/66473
        * gcc.target/i386/pr66473.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/i386/pr66473.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog

[Bug target/66473] ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

--- Comment #8 from uros at gcc dot gnu.org ---
Author: uros
Date: Wed Jun 10 18:37:34 2015
New Revision: 224342

URL: https://gcc.gnu.org/viewcvs?rev=224342&root=gcc&view=rev
Log:
        PR target/66473
        * config/i386/i386.c (ix86_expand_vector_set): Use gen_int_mode
        to prepare mask operand for AVX512 modes.

testsuite/ChangeLog:

        PR target/66473
        * gcc.target/i386/pr66473.c: New test.


Added:
    branches/gcc-5-branch/gcc/testsuite/gcc.target/i386/pr66473.c
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/config/i386/i386.c
    branches/gcc-5-branch/gcc/testsuite/ChangeLog

[Bug target/66473] ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
           Assignee|kyukhin at gcc dot gnu.org         |ubizjak at gmail dot com

--- Comment #9 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
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Daniel Krügler <daniel.kruegler at googlemail dot com> changed:

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----------------------------------------------------------------------------
                 CC|                            |daniel.kruegler@googlemail.
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--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
This could be a possible compiler extension and you get a warning when using
it. What I consider as a defect is that it's not an error even when -pedantic
is activated.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idf489

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |segher at gcc dot gnu.org

--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Combine does not do this because it would need to combine 2 insns into 2.
This *can* be safely done (carefully).  As a result combine can do more
work (which is good), but lifetime of registers can get longer too (but
also shorter in some cases).  I don't yet know if it is a win on average.

diff --git a/gcc/combine.c b/gcc/combine.c
index 9861291..599d383 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -3992,8 +3992,8 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1,
rtx_insn *i0,
           && XVECLEN (newpat, 0) == 2
           && GET_CODE (XVECEXP (newpat, 0, 0)) == SET
           && GET_CODE (XVECEXP (newpat, 0, 1)) == SET
-          && (i1 || set_noop_p (XVECEXP (newpat, 0, 0))
-                 || set_noop_p (XVECEXP (newpat, 0, 1)))
+//        && (i1 || set_noop_p (XVECEXP (newpat, 0, 0))
+//               || set_noop_p (XVECEXP (newpat, 0, 1)))
           && GET_CODE (SET_DEST (XVECEXP (newpat, 0, 0))) != ZERO_EXTRACT
           && GET_CODE (SET_DEST (XVECEXP (newpat, 0, 0))) != STRICT_LOW_PART
           && GET_CODE (SET_DEST (XVECEXP (newpat, 0, 1))) != ZERO_EXTRACT

[Bug target/66473] ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |trippels at gcc dot gnu.org

--- Comment #10 from Uroš Bizjak <ubizjak at gmail dot com> ---
*** Bug 66540 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-488980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 15 09:24:37 2015
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Subject: [Bug target/66540] [5/6 Regression] glibc testsuite:  error: unrecognizable insn with -mavx512f
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66540

Uroš Bizjak <ubizjak at gmail dot com> changed:

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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Dup.

*** This bug has been marked as a duplicate of bug 66473 ***
>From gcc-bugs-return-488982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 15 09:55:26 2015
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Subject: [Bug middle-end/66432] libgomp.c/appendix-a/a.29.1.c -O2 -g: type mismatch between an SSA_NAME and its symbol
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idf432

--- Comment #2 from vries at gcc dot gnu.org ---
At fnsplit, we split off f.part.0 from f.

That introduces a debug_insn and ssa-name that references param B in f:
...
  # DEBUG D#4ptD.0 => B_3(D)
..

And a debug_insn that references param B in f.part.0:
...
  # DEBUG D#7ptD.0 s=> BD.1846
...

At this point, the type of the ssa name and the param are the same.

Then at inline, we decide to inline f.part.0 back into the f.

For inlining, we rewrite the body of inlined function f.part.0. While rewriting
the debug insn mentioned above, we hit this code for param B:
...
      if (TREE_CODE (*tp) != OMP_CLAUSE)
        TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
...

And since it's a variable-sized type, the type of param is changed.

Now the type of the ssa name and the param are no longer the same, and a bit
later we hit the ICE.

[Bug target/66473] ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

[andrew.n.senkevich at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

Andrew Senkevich <andrew.n.senkevich at gmail dot com> changed:

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----------------------------------------------------------------------------
             Status|RESOLVED                    |VERIFIED

--- Comment #11 from Andrew Senkevich <andrew.n.senkevich at gmail dot com> ---
Thank you!