[Bug target/95032] New: [11 Regression] ICE in extract_insn, at recog.c:2294 since r11-187-g98329e3f5b85acc50d

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95032

            Bug ID: 95032
           Summary: [11 Regression] ICE in extract_insn, at recog.c:2294
                    since r11-187-g98329e3f5b85acc50d
           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: marxin at gcc dot gnu.org
                CC: segher at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: ppc64le-linux-gnu

The following is causing trouble:

$ /dev/shm/gcc-objdir-bisect/gcc/xgcc -B/dev/shm/gcc-objdir-bisect/gcc
/home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/pr94292.c -c -mfuture
/home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/pr94292.c: In function
‘foo’:
/home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/pr94292.c:13:1: error:
unrecognizable insn:
   13 | }
      | ^
(insn 19 18 20 2 (set (reg:DI 137)
        (if_then_else:DI (eq (reg:CCUNS 138)
                (const_int 0 [0]))
            (const_int 0 [0])
            (reg:DI 139)))
"/home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/pr94292.c":11:11 -1
     (nil))
during RTL pass: vregs
/home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/pr94292.c:13:1: internal
compiler error: in extract_insn, at recog.c:2294
0x8dca29 ???
        ../sysdeps/x86_64/start.S:120
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.

$ /dev/shm/gcc-objdir-bisect/gcc/xgcc -v
Using built-in specs.
COLLECT_GCC=/dev/shm/gcc-objdir-bisect/gcc/xgcc
Target: ppc64le-linux-gnu
Configured with: /home/marxin/Programming/gcc2/configure
--enable-languages=c,c++,fortran --disable-bootstrap --disable-libsanitizer
--target=ppc64le-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.0.0 20200507 (experimental) (GCC)