[Bug target/101507] New: ice for gcc.dg/Wstringop-overflow-69.c with -march=iwmmxt

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101507

            Bug ID: 101507
           Summary: ice for gcc.dg/Wstringop-overflow-69.c with
                    -march=iwmmxt
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

For gcc testsuite file ./gcc.dg/Wstringop-overflow-69.c, it compiles happily
with march=armv8.6-a and many other settings, but isn't happy with
-march=iwmmxt

$ /home/dcb/raspberrypi/results/bin/arm-linux-gnueabihf-gcc -c -w -march=iwmmxt
./gcc.dg/Wstringop-overflow-69.c
during RTL pass: reload
./gcc.dg/Wstringop-overflow-69.c: In function ‘warn_vec_func’:
./gcc.dg/Wstringop-overflow-69.c:84:1: internal compiler error: maximum number
of generated reload insns per insn achieved (90)
   84 | }
      | ^
0xd7d3aa lra_constraints(bool)
        /home/dcb/gcc/trunk.git/gcc/lra-constraints.c:5091

This looks to me like some internal buffer overflow.