[Bug lto/112732] New: during IPA pass: *free_lang_data ICE: 'verify_type' failed: type variant with 'TYPE_ALIAS_SET_KNOWN_P' with -Os -Wstrict-aliasing=2 -flto

[Bug lto/112732] New: during IPA pass: *free_lang_data ICE: 'verify_type' failed: type variant with 'TYPE_ALIAS_SET_KNOWN_P' with -Os -Wstrict-aliasing=2 -flto

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112732

            Bug ID: 112732
           Summary: during IPA pass: *free_lang_data ICE: 'verify_type'
                    failed: type variant with 'TYPE_ALIAS_SET_KNOWN_P'
                    with -Os -Wstrict-aliasing=2 -flto
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu

Created attachment 56702
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56702&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -Os -Wstrict-aliasing=2 -flto testcase.c 
testcase.c:11:1: error: type variant with 'TYPE_ALIAS_SET_KNOWN_P'
   11 | }
      | ^
 <vector_type 0x7f152f4a9540
    type <integer_type 0x7f152f31b9d8 __int128 public TI
        size <integer_cst 0x7f152f2fbf90 constant 128>
        unit-size <integer_cst 0x7f152f2fbfa8 constant 16>
        align:128 warn_if_not_align:0 symtab:0 alias-set 1 canonical-type
0x7f152f31b9d8 precision:128 min <integer_cst 0x7f152f2fc680
-170141183460469231731687303715884105728> max <integer_cst 0x7f152f2fc6a0
170141183460469231731687303715884105727>>
    BLK
    size <integer_cst 0x7f152f31d2b8 type <integer_type 0x7f152f31b0a8
bitsizetype> constant 256>
    unit-size <integer_cst 0x7f152f31d3a8 type <integer_type 0x7f152f31b000
sizetype> constant 32>
    align:256 warn_if_not_align:0 symtab:0 alias-set 1 canonical-type
0x7f152f4a9540 nunits:2
    pointer_to_this <pointer_type 0x7f152f4d2000>>
 <vector_type 0x7f152f4d2150
    type <integer_type 0x7f152f31b9d8 __int128 public TI
        size <integer_cst 0x7f152f2fbf90 constant 128>
        unit-size <integer_cst 0x7f152f2fbfa8 constant 16>
        align:128 warn_if_not_align:0 symtab:0 alias-set 1 canonical-type
0x7f152f31b9d8 precision:128 min <integer_cst 0x7f152f2fc680
-170141183460469231731687303715884105728> max <integer_cst 0x7f152f2fc6a0
170141183460469231731687303715884105727>>
    BLK
    size <integer_cst 0x7f152f31d2b8 type <integer_type 0x7f152f31b0a8
bitsizetype> constant 256>
    unit-size <integer_cst 0x7f152f31d3a8 type <integer_type 0x7f152f31b000
sizetype> constant 32>
    align:256 warn_if_not_align:0 symtab:0 alias-set 1 canonical-type
0x7f152f4a9540 nunits:2>
during IPA pass: *free_lang_data
testcase.c:11:1: internal compiler error: 'verify_type' failed
0x180729e verify_type(tree_node const*)
        /repo/gcc-trunk/gcc/tree.cc:14384
0x25dd002 free_lang_data
        /repo/gcc-trunk/gcc/ipa-free-lang-data.cc:1134
0x25dd002 execute
        /repo/gcc-trunk/gcc/ipa-free-lang-data.cc:1176
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-5872-20231127103959-gd9abaa8d58f-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-5872-20231127103959-gd9abaa8d58f-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20231127 (experimental) (GCC)

[Bug lto/112732] during IPA pass: *free_lang_data ICE: 'verify_type' failed: type variant with 'TYPE_ALIAS_SET_KNOWN_P' with -Os -Wstrict-aliasing=2 -flto

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112732

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-11-28
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.

[Bug lto/112732] during IPA pass: *free_lang_data ICE: 'verify_type' failed: type variant with 'TYPE_ALIAS_SET_KNOWN_P' with -Os -Wstrict-aliasing=2 -flto

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112732

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
           Keywords|                            |ice-checking
                 CC|                            |hubicka at gcc dot gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The vector type is built as a distinct type copy from a vector type that has
the alias set already set (by the diagnostic code).

#0  0x0000000001adac14 in build_opaque_vector_type (
    innertype=<integer_type 0x7ffff6a2b9d8 __int128>, nunits=...)
    at /home/rguenther/src/trunk/gcc/tree.cc:10271
#1  0x0000000000d97c7c in build_binary_op (location=279873, code=EQ_EXPR, 
    orig_op0=<var_decl 0x7ffff6a19cf0 w>, 
    orig_op1=<var_decl 0x7ffff6a19d80 d>, convert_p=true)
    at /home/rguenther/src/trunk/gcc/c/c-typeck.cc:12617
#2  0x0000000000d7230f in parser_build_binary_op (location=279873, 
    code=EQ_EXPR, arg1=..., arg2=...)
    at /home/rguenther/src/trunk/gcc/c/c-typeck.cc:3766

I think given this checking that build_opaque_vector_type should clear
TYPE_ALIAS_SET.

[Bug lto/112732] during IPA pass: *free_lang_data ICE: 'verify_type' failed: type variant with 'TYPE_ALIAS_SET_KNOWN_P' with -Os -Wstrict-aliasing=2 -flto

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112732

--- Comment #3 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:f26d68d5d128c86faaceeb81b1e8f22254ad53df

commit r14-5934-gf26d68d5d128c86faaceeb81b1e8f22254ad53df
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Nov 28 12:36:21 2023 +0100

    middle-end/112732 - stray TYPE_ALIAS_SET in type variant

    The following fixes a stray TYPE_ALIAS_SET in a type variant built
    by build_opaque_vector_type which is diagnosed by type checking
    enabled with -flto.

            PR middle-end/112732
            * tree.cc (build_opaque_vector_type): Reset TYPE_ALIAS_SET
            of the newly built type.

[Bug lto/112732] during IPA pass: *free_lang_data ICE: 'verify_type' failed: type variant with 'TYPE_ALIAS_SET_KNOWN_P' with -Os -Wstrict-aliasing=2 -flto

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112732

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
   Target Milestone|---                         |14.0
             Status|ASSIGNED                    |RESOLVED

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk.

[Bug lto/112732] during IPA pass: *free_lang_data ICE: 'verify_type' failed: type variant with 'TYPE_ALIAS_SET_KNOWN_P' with -Os -Wstrict-aliasing=2 -flto

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112732

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:664ab9c6e8a5d031031596100997e025e5334e86

commit r13-8721-g664ab9c6e8a5d031031596100997e025e5334e86
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Nov 28 12:36:21 2023 +0100

    middle-end/112732 - stray TYPE_ALIAS_SET in type variant

    The following fixes a stray TYPE_ALIAS_SET in a type variant built
    by build_opaque_vector_type which is diagnosed by type checking
    enabled with -flto.

            PR middle-end/112732
            * tree.cc (build_opaque_vector_type): Reset TYPE_ALIAS_SET
            of the newly built type.

    (cherry picked from commit f26d68d5d128c86faaceeb81b1e8f22254ad53df)