[Bug target/97192] New: [11 Regression] ICE: in gimple_expand_vec_cond_expr, at gimple-isel.cc:133 with -O -ftracer -mavx512vl

[Bug target/97192] New: [11 Regression] ICE: in gimple_expand_vec_cond_expr, at gimple-isel.cc:133 with -O -ftracer -mavx512vl

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97192

            Bug ID: 97192
           Summary: [11 Regression] ICE: in gimple_expand_vec_cond_expr,
                    at gimple-isel.cc:133 with -O -ftracer -mavx512vl
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu

Created attachment 49265
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49265&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -ftracer -mavx512vl testcase.c 
during GIMPLE pass: isel
testcase.c: In function 'foo':
testcase.c:7:1: internal compiler error: in gimple_expand_vec_cond_expr, at
gimple-isel.cc:133
    7 | foo (void)
      | ^~~
0x7679cf gimple_expand_vec_cond_expr
        /repo/gcc-trunk/gcc/gimple-isel.cc:133
0x122787c gimple_expand_vec_cond_exprs
        /repo/gcc-trunk/gcc/gimple-isel.cc:179
0x122787c execute
        /repo/gcc-trunk/gcc/gimple-isel.cc:229
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.

$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r11-3421-20200924150219-gfff56af6421-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/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
--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-r11-3421-20200924150219-gfff56af6421-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.0.0 20200924 (experimental) (GCC)

[Bug target/97192] [11 Regression] ICE: in gimple_expand_vec_cond_expr, at gimple-isel.cc:133 with -O -ftracer -mavx512vl

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97192

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like the same case as for PR97085 for aarch64:

-  _19 = VEC_COND_EXPR <_18, { -1, -1, -1, -1, -1, -1, -1, -1 }, { 0, 0, 0, 0,
0, 0, 0, 0 }>;
-  _20 = {a.2_2, a.2_2, a.2_2, a.2_2, a.2_2, a.2_2, a.2_2, a.2_2};
-  _21 = _19 == _20;
+  _21 = VEC_COND_EXPR <_18, { 0, 0, 0, 0, 0, 0, 0, 0 }, { -1, -1, -1, -1, -1,
-1, -1, -1 }>;
   _22 = VEC_COND_EXPR <_21, { -1, -1, -1, -1, -1, -1, -1, -1 }, { 0, 0, 0, 0,
0, 0, 0, 0 }>;

so we compute the VEC_COND_EXPR mask using a VEC_COND_EXPR.  And it's indeed
fixed by the fix for said PR.  I will add the testcase.

*** This bug has been marked as a duplicate of bug 97085 ***

[Bug target/97192] [11 Regression] ICE: in gimple_expand_vec_cond_expr, at gimple-isel.cc:133 with -O -ftracer -mavx512vl

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97192

--- Comment #2 from Zdenek Sojka <zsojka at seznam dot cz> ---
Sorry for the dup. I used gcc built this morning, and I didn't find PR97085,
since it was closed in the meantime.