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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/101549] New: [12 Regression] internal compiler error: in
 extract_insn, at recog.c:2769
Date: Wed, 21 Jul 2021 11:58:07 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101549

            Bug ID: 101549
           Summary: [12 Regression] internal compiler error: in
                    extract_insn, at recog.c:2769
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

[hjl@gnu-cfl-2 gcc]$ cat /tmp/x.c=20
#include <immintrin.h>

unsigned int
test_mm_crc32_u8(unsigned int CRC, unsigned char V)
{
  return _mm_crc32_u8(CRC, V);
}=20=20=20
[hjl@gnu-cfl-2 gcc]$ ./xgcc -B./ -S /tmp/x.c -msse4 -mno-crc32
/tmp/x.c: In function =E2=80=98test_mm_crc32_u8=E2=80=99:
/tmp/x.c:7:1: error: unrecognizable insn:
    7 | }
      | ^
(insn 16 15 22 2 (set (reg:SI 84 [ D.24970 ])
        (unspec:SI [
                (reg:SI 89)
                (subreg:QI (reg:SI 90) 0)
            ] UNSPEC_CRC32)) "./include/smmintrin.h":829:10 -1
     (nil))
during RTL pass: vregs
/tmp/x.c:7:1: internal compiler error: in extract_insn, at recog.c:2769
0x125686e _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /export/gnu/import/git/gitlab/x86-gcc/gcc/rtl-error.c:108
0x12568af _fatal_insn_not_found(rtx_def const*, char const*, int, char cons=
t*)
        /export/gnu/import/git/gitlab/x86-gcc/gcc/rtl-error.c:116
0x11fd163 extract_insn(rtx_insn*)
        /export/gnu/import/git/gitlab/x86-gcc/gcc/recog.c:2769
0xe5d4cf instantiate_virtual_regs_in_insn
        /export/gnu/import/git/gitlab/x86-gcc/gcc/function.c:1611
0xe5eb4c instantiate_virtual_regs
        /export/gnu/import/git/gitlab/x86-gcc/gcc/function.c:1985
0xe5ec1c execute
        /export/gnu/import/git/gitlab/x86-gcc/gcc/function.c:2034
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.
[hjl@gnu-cfl-2 gcc]$=