[Bug target/94435] New: ICE in extract_insn, at recog.c:2294

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94435

            Bug ID: 94435
           Summary: ICE in extract_insn, at recog.c:2294
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: jakub at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: aarch64-linux-gnu

Once Jakub added a new test-case I see:

$ ./xgcc -B. /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr94368.c
-moutline-atomics -c
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr94368.c: In function ‘bar’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr94368.c:25:1: error:
unrecognizable insn:
   25 | }
      | ^
(insn 62 61 63 8 (set (reg:CC 66 cc)
        (compare:CC (reg:SI 0 x0)
            (reg:HI 122)))
"/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr94368.c":23:7 -1
     (nil))
during RTL pass: vregs
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr94368.c:25:1: internal
compiler error: in extract_insn, at recog.c:2294
0x119b89f _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /home/marxin/Programming/gcc2/gcc/rtl-error.c:108
0x119b8e0 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /home/marxin/Programming/gcc2/gcc/rtl-error.c:116
0x114a983 extract_insn(rtx_insn*)
        /home/marxin/Programming/gcc2/gcc/recog.c:2294
0xdb0281 instantiate_virtual_regs_in_insn
        /home/marxin/Programming/gcc2/gcc/function.c:1607
0xdb1859 instantiate_virtual_regs
        /home/marxin/Programming/gcc2/gcc/function.c:1977
0xdb1924 execute
        /home/marxin/Programming/gcc2/gcc/function.c:2026
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.

The issues started with r10-3301-g3950b229a5ed6710f30241c2ddc3c74909bf4740
where -moutline-atomics was added.