[Bug target/103074] New: [11/12 Regression] ICE in lra_assign, at lra-assigns.c:1649

["asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103074

            Bug ID: 103074
           Summary: [11/12 Regression] ICE in lra_assign, at
                    lra-assigns.c:1649
           Product: gcc
           Version: 12.0
            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-12.0.0-alpha20211031 snapshot (g:ca84f39399fda80c770306465276ffd66d3766ed)
ICEs when compiling the following testcase, which could expose UB in run time,
w/ -march=bonnell -Os -fPIC -fschedule-insns:

void
serialize_collection (char *ptr, int a, int need_owner)
{
  if (need_owner)
    __builtin_sprintf(ptr, "%d:%d", 0, a);
  else
    {
      static char buff[32];

      __builtin_sprintf(buff, "%d:%d", a >> 32, a);
      __builtin_sprintf(ptr, "%d:%d:\"%s\"", 0, 0, buff);
    }
}

% x86_64-unknown-linux-gnu-gcc-12.0.0 -march=bonnell -Os -fPIC -fschedule-insns
-c jmolltrp.c
jmolltrp.c: In function 'serialize_collection':
jmolltrp.c:10:42: warning: right shift count >= width of type
[-Wshift-count-overflow]
   10 |       __builtin_sprintf(buff, "%d:%d", a >> 32, a);
      |                                          ^~
during RTL pass: reload
jmolltrp.c:13:1: internal compiler error: in lra_assign, at lra-assigns.c:1649
   13 | }
      | ^
0xce9af3 lra_assign(bool&)
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211031/work/gcc-12-20211031/gcc/lra-assigns.c:1649
0xce3da4 lra(_IO_FILE*)
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211031/work/gcc-12-20211031/gcc/lra.c:2387
0xc9c029 do_reload
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211031/work/gcc-12-20211031/gcc/ira.c:5932
0xc9c029 execute
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211031/work/gcc-12-20211031/gcc/ira.c:6118