[Bug rtl-optimization/61239] New: [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[Bug rtl-optimization/61239] New: [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61239

            Bug ID: 61239
           Summary: [4.10 Regression]: ICE in decompose, at rtl.h when
                    compiling vshuf-v16hi.c using -mavx2
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ubizjak at gmail dot com

As found in [1]:

FAIL: c-c++-common/torture/vshuf-v16hi.c  -O0  (internal compiler error)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O0  (test for excess errors)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O1  (internal compiler error)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O1  (test for excess errors)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O2  (internal compiler error)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O2  (test for excess errors)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O3 -fomit-frame-pointer  (internal
compiler error)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O3 -fomit-frame-pointer  (test for
excess errors)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O3 -g  (internal compiler error)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O3 -g  (test for excess errors)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -Os  (internal compiler error)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -Os  (test for excess errors)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O2 -flto -fno-use-linker-plugin
-flto-partition=none  (internal compiler error)
FAIL: c-c++-common/torture/vshuf-v16hi.c  -O2 -flto -fno-use-linker-plugin
-flto-partition=none  (test for excess errors)

$ /ssd/uros/gcc-build/gcc/cc1 -O2 -mavx2 -quiet vshuf-v16hi.c 
In file included from vshuf-v16hi.c:5:0:
vshuf-main.inc: In function ‘main’:
vshuf-main.inc:12:9: internal compiler error: in decompose, at rtl.h:1456
       V r = __builtin_shuffle(tests[i].in, tests[i].mask);
         ^
0x72fe16 wi::int_traits<std::pair<rtx_def*, machine_mode> >::decompose(long*,
unsigned int, std::pair<rtx_def*, machine_mode> const&)
        /home/uros/gcc-svn/trunk/gcc/rtl.h:1454
0x72fe16 wide_int_ref_storage<std::pair<rtx_def*, machine_mode> >
        /home/uros/gcc-svn/trunk/gcc/wide-int.h:950
0x72fe16 generic_wide_int<std::pair<rtx_def*, machine_mode> >
        /home/uros/gcc-svn/trunk/gcc/wide-int.h:727
0x72fe16 make_tree(tree_node*, rtx_def*)
        /home/uros/gcc-svn/trunk/gcc/expmed.c:4970
0x72fa0b make_tree(tree_node*, rtx_def*)
        /home/uros/gcc-svn/trunk/gcc/expmed.c:5001
0xc39055 force_const_mem(machine_mode, rtx_def*)
        /home/uros/gcc-svn/trunk/gcc/varasm.c:3694
0x7430c2 emit_move_insn(rtx_def*, rtx_def*)
        /home/uros/gcc-svn/trunk/gcc/expr.c:3587
0x725dbb force_reg
        /home/uros/gcc-svn/trunk/gcc/explow.c:670
0xc8d717 ix86_expand_vec_perm(rtx_def**)
        /home/uros/gcc-svn/trunk/gcc/config/i386/i386.c:21548
0xd65635 gen_vec_permv16hi(rtx_def*, rtx_def*, rtx_def*, rtx_def*)
        /home/uros/gcc-svn/trunk/gcc/config/i386/sse.md:8934

[1] https://gcc.gnu.org/ml/gcc-testresults/2014-05/msg01644.html
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Subject: [Bug target/61208] armhf: generated asm code produces "branch out of range" error in gas with -Os
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ida208

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2014-05-19
      Known to work|4.9.0                       |
           Assignee|unassigned at gcc dot gnu.org      |rearnsha at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Confrimed.  This is just latent on 4.9 and trunk.

The problem is the arm_cmpdi_unsigned pattern which fails to account for the
extra Thumb IT instruction.

[Bug rtl-optimization/61239] [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61239

Richard Biener <rguenth at gcc dot gnu.org> changed:

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

[Bug rtl-optimization/61239] [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61239

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikestump at comcast dot net,
                   |                            |rsandifo at gcc dot gnu.org,
                   |                            |zadeck at gcc dot gnu.org

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Looks like fallout from wide-int merge. Adding CCs.
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Subject: [Bug lto/61256] [4.10 regression] Building spec2000/252.eon with LTO got a compfail after r210522
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ida256

--- Comment #1 from Igor Zamyatin <izamyatin at gmail dot com> ---
Fixed by r210672

[Bug rtl-optimization/61239] [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61239

Uroš Bizjak <ubizjak at gmail dot com> changed:

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

--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Some more digging:

(gdb) up
#10 0x0000000000ee741e in ix86_expand_vec_perm (operands=0x7fffffffaf30) at
../../gcc-svn/trunk/gcc/config/i386/i386.c:21548
21548             vt = force_reg (V32QImode, vt);
(gdb) p debug_rtx (vt)
(const_vector:V32QI [
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
        (const_int 128 [0x80])
    ])
$11 = void

These don't look like valid QImode elements. Jakub?
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Subject: [Bug rtl-optimization/61325] [4.10 regression] aarch64_be build fails
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ida325

--- Comment #5 from christophe.lyon at st dot com ---
I confirm that the build is now fixed.

[Bug target/61239] [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61239

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2014-06-02
          Component|rtl-optimization            |target
     Ever confirmed|0                           |1

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
Patch in testing:

--cut here--
Index: i386.c
===================================================================
--- i386.c      (revision 211125)
+++ i386.c      (working copy)
@@ -21541,7 +21541,7 @@ ix86_expand_vec_perm (rtx operands[])
          t1 = gen_reg_rtx (V32QImode);
          t2 = gen_reg_rtx (V32QImode);
          t3 = gen_reg_rtx (V32QImode);
-         vt2 = GEN_INT (128);
+         vt2 = GEN_INT (-128);
          for (i = 0; i < 32; i++)
            vec[i] = vt2;
          vt = gen_rtx_CONST_VECTOR (V32QImode, gen_rtvec_v (32, vec));
--cut here--
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Subject: [Bug target/61239] [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ida239

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
LGTM, thanks.

[Bug target/61239] [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61239

--- Comment #5 from uros at gcc dot gnu.org ---
Author: uros
Date: Mon Jun  2 13:22:34 2014
New Revision: 211134

URL: http://gcc.gnu.org/viewcvs?rev=211134&root=gcc&view=rev
Log:
    PR target/61239
    * config/i386/i386.c (ix86_expand_vec_perm) [case V32QImode]: Use
    GEN_INT (-128) instead of GEN_INT (128) to set MSB of QImode constant.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c

[Bug target/61239] [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61239

--- Comment #6 from uros at gcc dot gnu.org ---
Author: uros
Date: Mon Jun  2 22:02:58 2014
New Revision: 211149

URL: http://gcc.gnu.org/viewcvs?rev=211149&root=gcc&view=rev
Log:
    Backport from mainline
    2014-06-02  Uros Bizjak  <ubizjak@gmail.com>

    PR target/61239
    * config/i386/i386.c (ix86_expand_vec_perm) [case V32QImode]: Use
    GEN_INT (-128) instead of GEN_INT (128) to set MSB of QImode constant.


Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/config/i386/i386.c

[Bug target/61239] [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61239

--- Comment #7 from uros at gcc dot gnu.org ---
Author: uros
Date: Mon Jun  2 22:05:48 2014
New Revision: 211150

URL: http://gcc.gnu.org/viewcvs?rev=211150&root=gcc&view=rev
Log:
    Backport from mainline
    2014-06-02  Uros Bizjak  <ubizjak@gmail.com>

    PR target/61239
    * config/i386/i386.c (ix86_expand_vec_perm) [case V32QImode]: Use
    GEN_INT (-128) instead of GEN_INT (128) to set MSB of QImode constant.


Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/config/i386/i386.c

[Bug target/61239] [4.10 Regression]: ICE in decompose, at rtl.h when compiling vshuf-v16hi.c using -mavx2

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61239

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|4.10.0                      |4.8.4

--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed for 4.8.4+.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idW519

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jun  2 22:10:57 2014
New Revision: 211151

URL: http://gcc.gnu.org/viewcvs?rev!1151&root=gcc&view=rev
Log:
        PR debug/57519
        * class.c (handle_using_decl): Pass the correct scope to
        cp_emit_debug_info_for_using.

Added:
    trunk/gcc/testsuite/g++.dg/debug/dwarf2/imported-decl-2.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/class.c