[Bug tree-optimization/97466] New: ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3)

[Bug tree-optimization/97466] New: ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3)

[su at cs dot ucdavis.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97466

            Bug ID: 97466
           Summary: ICE in vect_get_and_check_slp_defs, at
                    tree-vect-slp.c:538 (at -O3)
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu
  Target Milestone: ---

[503] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/suz-local/software/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/11.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--prefix=/local/suz-local/software/local/gcc-trunk --enable-languages=c,c++
--disable-werror --enable-multilib --with-system-zlib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.0.0 20201016 (experimental) [master revision
3e8d8f3b883:93f23a96b87:02629b116eed7c6911ef0eb2ef97e1883e9fb1de] (GCC) 
[504] % 
[504] % gcctk -O2 small.c
[505] % 
[505] % gcctk -O3 small.c
during GIMPLE pass: vect
small.c: In function ‘main’:
small.c:59:5: internal compiler error: in vect_get_and_check_slp_defs, at
tree-vect-slp.c:538
   59 | int main () {
      |     ^~~~
0xfdf1ee vect_get_and_check_slp_defs
        ../../gcc-trunk/gcc/tree-vect-slp.c:536
0xfe4c11 vect_build_slp_tree_2
        ../../gcc-trunk/gcc/tree-vect-slp.c:1443
0xfe36e9 vect_build_slp_tree
        ../../gcc-trunk/gcc/tree-vect-slp.c:1266
0xfe4d2c vect_build_slp_tree_2
        ../../gcc-trunk/gcc/tree-vect-slp.c:1486
0xfe36e9 vect_build_slp_tree
        ../../gcc-trunk/gcc/tree-vect-slp.c:1266
0xfe4d2c vect_build_slp_tree_2
        ../../gcc-trunk/gcc/tree-vect-slp.c:1486
0xfe36e9 vect_build_slp_tree
        ../../gcc-trunk/gcc/tree-vect-slp.c:1266
0xfeae71 vect_analyze_slp_instance
        ../../gcc-trunk/gcc/tree-vect-slp.c:2135
0xfee1da vect_analyze_slp(vec_info*, unsigned int)
        ../../gcc-trunk/gcc/tree-vect-slp.c:2441
0xfcde42 vect_analyze_loop_2
        ../../gcc-trunk/gcc/tree-vect-loop.c:2262
0xfcde42 vect_analyze_loop(loop*, vec_info_shared*)
        ../../gcc-trunk/gcc/tree-vect-loop.c:2799
0xff679c try_vectorize_loop_1
        ../../gcc-trunk/gcc/tree-vectorizer.c:994
0xff7269 vectorize_loops()
        ../../gcc-trunk/gcc/tree-vectorizer.c:1226
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
[506] % 
[506] % cat small.c
struct b {
  int c;
  char e;
  char f;
  unsigned g;
};

struct h {
  int i : 2;
};

static short j = 5;
static int k, l, m, ah;
static char n;
static struct b o, p;
int *q;
static int **r = &q;
char s;
static struct h t;
short u;

unsigned char a (unsigned char v, unsigned char w) {
  return w ? v % w : 0;
}

void ac () {
  ah = 0 >= t.i;
  while (n)
    ;
}

short d (short v) { return v; }

static int x () {
  int y;
  char aa;
  int *ab = &k;
  o.f = 0;
  while (!j)
    ;
  ac();
  while (s) {
    char ad;
    int ae;
    p.e = ad = 7;
    for (; ad; ad--) {
      unsigned af = 4;
      ae = 1;
      for (; ae >= 0; ae--) {
        aa = a ((p.g == (l >= af) || y), *ab);
        **r ^= (d ((m < o.c) ^ aa) == 0) ^ u;
      }
    }
    *ab = 0;
  }
  return 0;
}

int main () {
  x();
  return 0;
}

[Bug tree-optimization/97466] ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3)

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97466

David Binderman <dcb314 at hotmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dcb314 at hotmail dot com

--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
I also see this when I bootstrap gcc with -O3.

[Bug tree-optimization/97466] ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3) since r11-3998-g540d5f4f0215e1cd

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97466

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |11.0
   Last reconfirmed|                            |2020-10-19
                 CC|                            |marxin at gcc dot gnu.org
           Keywords|                            |ice-on-valid-code
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |10.2.0
     Ever confirmed|0                           |1
            Summary|ICE in                      |ICE in
                   |vect_get_and_check_slp_defs |vect_get_and_check_slp_defs
                   |, at tree-vect-slp.c:538    |, at tree-vect-slp.c:538
                   |(at -O3)                    |(at -O3) since
                   |                            |r11-3998-g540d5f4f0215e1cd
   Target Milestone|---                         |11.0

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with Richi's r11-3998-g540d5f4f0215e1cd.

[Bug tree-optimization/97466] ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3) since r11-3998-g540d5f4f0215e1cd

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97466

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.

[Bug tree-optimization/97466] [11 Regression] ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3) since r11-3998-g540d5f4f0215e1cd

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97466

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1
            Summary|ICE in                      |[11 Regression] ICE in
                   |vect_get_and_check_slp_defs |vect_get_and_check_slp_defs
                   |, at tree-vect-slp.c:538    |, at tree-vect-slp.c:538
                   |(at -O3) since              |(at -O3) since
                   |r11-3998-g540d5f4f0215e1cd  |r11-3998-g540d5f4f0215e1cd

[Bug tree-optimization/97466] [11 Regression] ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3) since r11-3998-g540d5f4f0215e1cd

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97466

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 97480 has been marked as a duplicate of this bug. ***

[Bug tree-optimization/97466] [11 Regression] ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3) since r11-3998-g540d5f4f0215e1cd

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97466

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Meh, I didn't intend to commit this assert ...

[Bug tree-optimization/97466] [11 Regression] ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3) since r11-3998-g540d5f4f0215e1cd

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97466

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:95f27849a580ac834d4f51a0642da9671f0a9dee

commit r11-4034-g95f27849a580ac834d4f51a0642da9671f0a9dee
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Oct 19 11:07:36 2020 +0200

    tree-optimization/97466 - remove spurious assert

    This removes an assertion that was supposed to be only for temporary
    debugging.  I've also re-indented the code which I missed as well.

    2020-10-19  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/97466
            * tree-vect-slp.c (vect_get_and_check_slp_defs): Remove
            spurious assert, re-indent.

[Bug tree-optimization/97466] [11 Regression] ICE in vect_get_and_check_slp_defs, at tree-vect-slp.c:538 (at -O3) since r11-3998-g540d5f4f0215e1cd

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97466

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

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

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.