[Bug target/94561] New: [10 Regression] ICE in ix86_get_ssemov

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94561

            Bug ID: 94561
           Summary: [10 Regression] ICE in ix86_get_ssemov
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: x86_64-unknown-linux-gnu

gcc-10.0.1-alpha20200405 snapshot (g:2a1a0c8c0db0aae50a2cebce59bd64334cd6ba2a)
ICEs when compiling the following testcase w/ -march=knl -O3 -funroll-loops:

struct xi {
  long int mg;
  int lx;
};

struct xi *di;
int *eu;

void
he (void);

int
m8 (int we, int i8)
{
  int wd, cj = 0;

  for (wd = 0; wd < 80; ++wd)
    {
      if (di->mg == 0 && (eu[wd] | !!we) == 0 && di->lx == 0)
        continue;

      if (i8 == 0)
        he ();

      ++cj;
    }

  return cj;
}

% x86_64-unknown-linux-gnu-gcc-10.0.1 -march=knl -O3 -funroll-loops -c
cn71lqz4.c
during RTL pass: final
cn71lqz4.c: In function 'm8':
cn71lqz4.c:29:1: internal compiler error: in ix86_get_ssemov, at
config/i386/i386.c:4979
   29 | }
      | ^
0x718cbd ix86_get_ssemov
       
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200405/work/gcc-10-20200405/gcc/config/i386/i386.c:4979
0xa34303 final_scan_insn_1
       
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200405/work/gcc-10-20200405/gcc/final.c:3039
0xa3480b final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
       
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200405/work/gcc-10-20200405/gcc/final.c:3152
0xa34917 final_1
       
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200405/work/gcc-10-20200405/gcc/final.c:2020
0xa35524 rest_of_handle_final
       
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200405/work/gcc-10-20200405/gcc/final.c:4658
0xa35524 execute
       
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200405/work/gcc-10-20200405/gcc/final.c:4736