[Bug tree-optimization/115508] New: ICE when building flac with -O2 -march=znver1

[Bug tree-optimization/115508] New: ICE when building flac with -O2 -march=znver1

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

            Bug ID: 115508
           Summary: ICE when building flac with -O2 -march=znver1
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sjames at gcc dot gnu.org
  Target Milestone: ---

Created attachment 58439
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58439&action=edit
fixed_intrin_avx2.i.xz

Originally reported downstream in Gentoo at https://bugs.gentoo.org/934383.

I can't reproduce it with -march=znver2, just -march=znver1. Not compared the
diff yet.

```
$ gcc-14 -c a.i -march=znver1 -m32 -mfpmath=sse -O2
during GIMPLE pass: slp
/var/tmp/portage/media-libs/flac-1.4.3/work/flac-1.4.3/src/libFLAC/fixed_intrin_avx2.c:
In function 'FLAC__fixed_compute_best_predictor_wide_intrin_avx2':
/var/tmp/portage/media-libs/flac-1.4.3/work/flac-1.4.3/src/libFLAC/fixed_intrin_avx2.c:57:10:
internal compiler error: Segmentation fault
0x55ccfe748bc3 crash_signal
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/toplev.cc:319
0x55ccfeaceb36 vect_schedule_slp_node
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/tree-vect-slp.cc:9279
0x55ccfeae8643 vect_schedule_slp_node
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/tree-vect-slp.cc:9248
0x55ccfeae8643 vect_schedule_scc
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/tree-vect-slp.cc:9682
0x55ccfeae86a8 vect_schedule_scc
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/tree-vect-slp.cc:9663
0x55ccfeae8e7a vect_schedule_slp(vec_info*, vec<_slp_instance*, va_heap,
vl_ptr> const&)
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/tree-vect-slp.cc:9827
0x55ccfeaebcc9 vect_slp_region
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/tree-vect-slp.cc:7948
0x55ccfeaed54a vect_slp_bbs
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/tree-vect-slp.cc:8048
0x55ccfeaedbea vect_slp_function(function*)
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/tree-vect-slp.cc:8170
0x55ccfeaf9b75 execute
       
/usr/src/debug/sys-devel/gcc-14.1.1_p20240608/gcc-14-20240608/gcc/tree-vectorizer.cc:1533
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://bugs.gentoo.org/> for instructions.
```

---

```
Using built-in specs.
COLLECT_GCC=gcc-14
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/14/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-14.1.1_p20240608/work/gcc-14-20240608/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/14
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/14/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/14
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/14/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/14/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/14/include/g++-v14
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/14/python
--enable-languages=c,c++,fortran,rust --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --disable-nls
--disable-libunwind-exceptions --enable-checking=yes,extra,rtl
--with-bugurl=https://bugs.gentoo.org/ --with-pkgversion='Gentoo Hardened
14.1.1_p20240608 p2' --with-gcc-major-version-only --enable-libstdcxx-time
--enable-lto --disable-libstdcxx-pch --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu --enable-multilib
--with-multilib-list=m32,m64 --disable-fixed-point --enable-targets=all
--enable-libgomp --disable-libssp --disable-libada --disable-cet
--disable-systemtap --enable-valgrind-annotations --disable-vtable-verify
--disable-libvtv --with-zstd --with-isl --disable-isl-version-check
--enable-default-pie --enable-host-pie --enable-host-bind-now
--enable-default-ssp --disable-fixincludes --with-build-config=bootstrap-O3
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.1.1 20240608 (Gentoo Hardened 14.1.1_p20240608 p2)
```

[Bug tree-optimization/115508] ICE when building flac with -O2 -march=znver1

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---

==3050649== Invalid read of size 8
==3050649==    at 0x192EB36: vect_schedule_slp_node(vec_info*, _slp_tree*,
_slp_instance*) [clone .part.0] (tree-vect-slp.cc:9279)
==3050649==    by 0x1948643: vect_schedule_slp_node (tree-vect-slp.cc:9248)
==3050649==    by 0x1948643: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_in
fo> >&, int&, vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.cc:9682)
==3050649==    by 0x19486A8: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_in
fo> >&, int&, vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.cc:9663)
==3050649==    by 0x1948E7A: vect_schedule_slp(vec_info*, vec<_slp_instance*,
va_heap, vl_ptr> const&) (tree-vect-slp.cc:9827)
==3050649==    by 0x194BCC9: vect_slp_region(vec<basic_block_def*, va_heap,
vl_ptr>, vec<data_reference*, va_heap, vl_ptr>, vec<int, va_heap, vl_ptr>*,
unsigned int, loop*) (tree-vect-sl
p.cc:7948)
==3050649==    by 0x194D54A: vect_slp_bbs(vec<basic_block_def*, va_heap,
vl_ptr> const&, loop*) (tree-vect-slp.cc:8048)
==3050649==    by 0x194DBEA: vect_slp_function(function*)
(tree-vect-slp.cc:8170)
==3050649==    by 0x1959B75: (anonymous
namespace)::pass_slp_vectorize::execute(function*) (tree-vectorizer.cc:1533)
==3050649==    by 0x1405CC2: execute_one_pass(opt_pass*) (passes.cc:2647)
==3050649==    by 0x1406B39: execute_pass_list_1 (passes.cc:2756)
==3050649==    by 0x1406B39: execute_pass_list_1(opt_pass*) (passes.cc:2757)
==3050649==    by 0x1406EF6: execute_pass_list_1 (passes.cc:2757)
==3050649==    by 0x1406EF6: execute_pass_list(function*, opt_pass*)
(passes.cc:2767)
==3050649==    by 0xF02976: cgraph_node::expand() (cgraphunit.cc:1845)
==3050649==  Address 0x20 is not stack'd, malloc'd or (recently) free'd
==3050649==
during GIMPLE pass: slp
/var/tmp/portage/media-libs/flac-1.4.3/work/flac-1.4.3/src/libFLAC/fixed_intrin_avx2.c:
In function 'FLAC__fixed_compute_best_predictor_wide_intrin_avx2':
/var/tmp/portage/media-libs/flac-1.4.3/work/flac-1.4.3/src/libFLAC/fixed_intrin_avx2.c:57:10:
internal compiler error: Segmentation fault

[Bug tree-optimization/115508] ICE when building flac with -O2 -march=znver1

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
I'm reducing.

[Bug tree-optimization/115508] ICE when building flac with -O2 -march=znver1

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #3 from Sam James <sjames at gcc dot gnu.org> ---
> I can't reproduce it with -march=znver2, just -march=znver1. Not compared
> the diff yet.

-march=znver2 -mprefer-vector-width=128 fails too

[Bug tree-optimization/115508] ICE when building flac with -O2 -march=znver1

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #4 from Sam James <sjames at gcc dot gnu.org> ---
Created attachment 58440
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58440&action=edit
reduced.i

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu.org
   Target Milestone|---                         |14.2
           Keywords|                            |ice-on-valid-code

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #5 from Sam James <sjames at gcc dot gnu.org> ---
On trunk with reduced.i, I get:
```
==3698089== Invalid read of size 8
==3698089==    at 0x2430014: UnknownInlinedFun (tree-vect-slp.cc:9672)
==3698089==    by 0x2430014: vect_schedule_slp_node(vec_info*, _slp_tree*,
_slp_instance*) (tree-vect-slp.cc:9514)
==3698089==    by 0x242F05C: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_in
fo> >&, int&, vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.cc:9965)
==3698089==    by 0x242EFAC: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_in
fo> >&, int&, vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.cc:9946)
==3698089==    by 0x2139092: vect_schedule_slp(vec_info*, vec<_slp_instance*,
va_heap, vl_ptr> const&) (tree-vect-slp.cc:10110)
==3698089==    by 0x1F013DB: vect_slp_region(vec<basic_block_def*, va_heap,
vl_ptr>, vec<data_reference*, va_heap, vl_ptr>, vec<int, va_heap, vl_ptr>*,
unsigned int, loop*) (tree-vect-sl
p.cc:8222)
==3698089==    by 0x1EFD5B3: vect_slp_bbs(vec<basic_block_def*, va_heap,
vl_ptr> const&, loop*) [clone .lto_priv.0] (tree-vect-slp.cc:8322)
==3698089==    by 0x1EFD2DA: vect_slp_function(function*)
(tree-vect-slp.cc:8444)
==3698089==    by 0x1EFCC6C: (anonymous
namespace)::pass_slp_vectorize::execute(function*) [clone .lto_priv.0]
(tree-vectorizer.cc:1534)
==3698089==    by 0x1B69A70: execute_one_pass(opt_pass*) (passes.cc:2647)
==3698089==    by 0x1C2C09B: execute_pass_list_1(opt_pass*) (passes.cc:2756)
==3698089==    by 0x1C2C0B8: execute_pass_list_1(opt_pass*) (passes.cc:2757)
==3698089==    by 0x1C2C0B8: execute_pass_list_1(opt_pass*) (passes.cc:2757)
==3698089==  Address 0x8 is not stack'd, malloc'd or (recently) free'd
==3698089==
during GIMPLE pass: slp
a.i: In function
‘FLAC__fixed_compute_best_predictor_limit_residual_intrin_avx2’:
a.i:5:6: internal compiler error: Segmentation fault
    5 | void FLAC__fixed_compute_best_predictor_limit_residual_intrin_avx2(
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0x12a1362 crash_signal
        /usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/toplev.cc:319
0x2430014 vect_schedule_slp_node
       
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-slp.cc:9672
0x2430014 vect_schedule_slp_node
       
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-slp.cc:9514
0x242f05c vect_schedule_scc
       
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-slp.cc:9965
0x242efac vect_schedule_scc
       
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-slp.cc:9946
0x2139092 vect_schedule_slp(vec_info*, vec<_slp_instance*, va_heap, vl_ptr>
const&)
       
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-slp.cc:10110
0x1f013db vect_slp_region
       
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-slp.cc:8222
0x1efd5b3 vect_slp_bbs
       
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-slp.cc:8322
0x1efd2da vect_slp_function(function*)
       
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-slp.cc:8444
0x1efcc6c execute
       
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vectorizer.cc:1534
```

I think pinskia will be able to simplify my reduced version more..

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #6 from Sam James <sjames at gcc dot gnu.org> ---
Created attachment 58441
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58441&action=edit
reduced_more.i

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2024-06-16

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 58442
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58442&action=edit
Semi-cleaned up testcase with some extra hooks

So note if you change any of the `#if 0` to `#if 1` or `#if 1` to `#if 0` the
crash in SLP no longer happens.

Note also with the last one change, the only difference deals with the PERM
that is being selected in SLP:
Due to the order of `BIT_FIELD_REF <vec_var.1_14, 64, 64>;` vs `BIT_FIELD_REF
<vec_var.1_14, 64, 0>;`. somehow.

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  _19 = BIT_FIELD_REF <vec_var.1_14, 64, 0>;
  _12 = BIT_FIELD_REF <vec_var.1_14, 64, 64>;
  _15 = _12 | _19;

vs
  _13 = BIT_FIELD_REF <vec_var.1_12, 64, 0>;
  _14 = BIT_FIELD_REF <vec_var.1_12, 64, 64>;
  _15 = _13 | _14;

So basically it is just by accident the order happens that way which is why the
reducing it further removing the stuff afterwards does not make any difference
...

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #58442|0                           |1
        is obsolete|                            |

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 58443
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58443&action=edit
A little more reduced

Slightly more reduced. Still trying to figure out the SLP thing here.

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #58443|0                           |1
        is obsolete|                            |

--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 58444
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58444&action=edit
Fails now without -m32

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1 since r14-5603-g2b59e2b4dff421

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

Sam James <sjames at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |liuhongt at gcc dot gnu.org
            Summary|[14/15 regression] ICE when |[14/15 regression] ICE when
                   |building flac with -O2      |building flac with -O2
                   |-march=znver1               |-march=znver1 since
                   |                            |r14-5603-g2b59e2b4dff421

--- Comment #12 from Sam James <sjames at gcc dot gnu.org> ---
It bisects to r14-5603-g2b59e2b4dff421 but someone more knowledgable than me
will have to say whether there's a deeper issue (e.g. missing validation or
whatever) in SLP.

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1 since r14-5603-g2b59e2b4dff421

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|unknown                     |14.1.1
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.

[Bug tree-optimization/115508] [14/15 regression] ICE when building flac with -O2 -march=znver1 since r14-5603-g2b59e2b4dff421

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #14 from GCC 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:65e72b95c63a5501cf1482f3814ae8c8e672bf06

commit r15-1375-g65e72b95c63a5501cf1482f3814ae8c8e672bf06
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Jun 17 14:36:56 2024 +0200

    tree-optimization/115508 - fix ICE with SLP scheduling and extern vector

    When there's a permute after an extern vector we can run into a case
    that didn't consider the scheduled node being a permute which lacks
    a representative.

            PR tree-optimization/115508
            * tree-vect-slp.cc (vect_schedule_slp_node): Guard check on
            representative.

            * gcc.target/i386/pr115508.c: New testcase.

[Bug tree-optimization/115508] [14 regression] ICE when building flac with -O2 -march=znver1 since r14-5603-g2b59e2b4dff421

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[14/15 regression] ICE when |[14 regression] ICE when
                   |building flac with -O2      |building flac with -O2
                   |-march=znver1 since         |-march=znver1 since
                   |r14-5603-g2b59e2b4dff421    |r14-5603-g2b59e2b4dff421
      Known to work|                            |15.0
           Priority|P3                          |P2

[Bug tree-optimization/115508] [14 regression] ICE when building flac with -O2 -march=znver1 since r14-5603-g2b59e2b4dff421

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Also depends on r15-772-g31e9bae0ea5e54

[Bug tree-optimization/115508] [14 regression] ICE when building flac with -O2 -march=znver1 since r14-5603-g2b59e2b4dff421

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

--- Comment #16 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-14 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:65e25860f49ee7a2cfd4872db06d94ed7675e12e

commit r14-10334-g65e25860f49ee7a2cfd4872db06d94ed7675e12e
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Jun 17 14:36:56 2024 +0200

    tree-optimization/115508 - fix ICE with SLP scheduling and extern vector

    When there's a permute after an extern vector we can run into a case
    that didn't consider the scheduled node being a permute which lacks
    a representative.

            PR tree-optimization/115508
            * tree-vect-slp.cc (vect_schedule_slp_node): Guard check on
            representative.

            * gcc.target/i386/pr115508.c: New testcase.

    (cherry picked from commit 65e72b95c63a5501cf1482f3814ae8c8e672bf06)

[Bug tree-optimization/115508] [14 regression] ICE when building flac with -O2 -march=znver1 since r14-5603-g2b59e2b4dff421

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115508

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
      Known to fail|                            |14.1.0

--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.