[Bug target/85769] New: ICE in extract_constrain_insn, at recog.c:2205 for -mcpu=thunderx

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85769

            Bug ID: 85769
           Summary: ICE in extract_constrain_insn, at recog.c:2205 for
                    -mcpu=thunderx
           Product: gcc
           Version: unknown
            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: pinskia at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: aarch64-linux-gnu

Following ICEs:

$ aarch64-linux-gnu-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/aarch64/f16_mov_immediate_1.c
-mcpu=thunderx
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/aarch64/f16_mov_immediate_1.c:
In function ‘f4’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/aarch64/f16_mov_immediate_1.c:38:1:
error: insn does not satisfy its constraints:
 }
 ^
(insn 36 33 40 2 (set (reg:HF 32 v0 [orig:91 <retval> ] [91])
        (reg:HF 0 x0 [orig:90 _8 ] [90]))
"/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/aarch64/f16_mov_immediate_1.c":37
51 {*movhf_aarch64}
     (nil))
during RTL pass: reload
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/aarch64/f16_mov_immediate_1.c:38:1:
internal compiler error: in extract_constrain_insn, at recog.c:2205
0x59ac3d _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        .././../gcc/rtl-error.c:108
0x59ac66 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        .././../gcc/rtl-error.c:118
0xb23c3d extract_constrain_insn(rtx_insn*)
        .././../gcc/recog.c:2205
0xa283b7 check_rtl
        .././../gcc/lra.c:2156
0xa2db79 lra(_IO_FILE*)
        .././../gcc/lra.c:2590
0x9e0d31 do_reload
        .././../gcc/ira.c:5465
0x9e0d31 execute
        .././../gcc/ira.c:5649