[Bug target/98079] New: [11 Regression] ICE in extract_insn, at recog.c:2315 since r11-5429-gacdf30d66cac1175

[marxin at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98079

            Bug ID: 98079
           Summary: [11 Regression] ICE in extract_insn, at recog.c:2315
                    since r11-5429-gacdf30d66cac1175
           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: ubizjak at gmail dot com
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: x86_64-linux-gnu

I see the following ICE since r11-5429-gacdf30d66cac1175:

$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr75964.c
-march=pentium3 -O2 -m32 -c
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr75964.c: In
function ‘abs8’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr75964.c:15:1:
error: unrecognizable insn:
   15 | }
      | ^
(insn 27 26 28 2 (set (reg/v:QI 84 [ x ])
        (if_then_else:QI (ge (reg:CCGOC 17 flags)
                (const_int 0 [0]))
            (reg:QI 88)
            (reg:QI 87)))
"/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr75964.c":9:7 -1
     (expr_list:REG_DEAD (reg:QI 88)
        (expr_list:REG_DEAD (reg:QI 87)
            (expr_list:REG_DEAD (reg:CCGOC 17 flags)
                (nil)))))
during RTL pass: ira
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/pr75964.c:15:1:
internal compiler error: in extract_insn, at recog.c:2315
0x6cedfd _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /home/marxin/Programming/gcc/gcc/rtl-error.c:108
0x6cee19 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /home/marxin/Programming/gcc/gcc/rtl-error.c:116
0x6cd3e0 extract_insn(rtx_insn*)
        /home/marxin/Programming/gcc/gcc/recog.c:2315
0xc0c62f ira_remove_insn_scratches(rtx_insn*, bool, _IO_FILE*, rtx_def*
(*)(rtx_def*))
        /home/marxin/Programming/gcc/gcc/ira.c:5234
0xc0d6bd remove_scratches
        /home/marxin/Programming/gcc/gcc/ira.c:5278
0xc0d6bd ira
        /home/marxin/Programming/gcc/gcc/ira.c:5583
0xc0d6bd execute
        /home/marxin/Programming/gcc/gcc/ira.c:5945
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