[Bug target/99706] New: [11 Regression] ICE: maximum number of generated reload insns per insn achieved (90)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99706

            Bug ID: 99706
           Summary: [11 Regression] ICE: maximum number of generated
                    reload insns per insn achieved (90)
           Product: gcc
           Version: 11.0
            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: aarch64-linux-gnu

gcc-11.0.1-alpha20210321 snapshot (g:fc24ea2374259d401a46ce3526688b7e79d4cc13)
ICEs when compiling the following testcase w/ -O2 -ftree-loop-vectorize
-fno-tree-pta --param scev-max-expr-size=5:

int kk;

void
ii (int BUFSIZE)
{
  char buf[BUFSIZE], *ptr = buf;
  int i;

  for (i = 0; i < BUFSIZE; i++)
    *ptr++ = kk = 0;
}

% aarch64-linux-gnu-gcc-11.0.1 -O2 -ftree-loop-vectorize -fno-tree-pta --param
scev-max-expr-size=5 -c oeplxogh.c
during RTL pass: reload
oeplxogh.c: In function 'ii':
oeplxogh.c:11:1: internal compiler error: maximum number of generated reload
insns per insn achieved (90)
   11 | }
      | ^
0xd42ab0 lra_constraints(bool)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/lra-constraints.c:5091
0xd2b3e5 lra(_IO_FILE*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/lra.c:2336
0xce15c4 do_reload
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/ira.c:5834
0xce15c4 execute
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/ira.c:6020

I believe it is different from PR97141.