[Bug c/88214] New: ICE in bitmap_intersect_p() on 32-bit BE platforms

[slyfox at inbox dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88214

            Bug ID: 88214
           Summary: ICE in bitmap_intersect_p() on 32-bit BE platforms
           Product: gcc
           Version: 7.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: slyfox at inbox dot ru
  Target Milestone: ---

Note: this ICE happens on 32-bit BE-hosts and does not happen on i686 host or
x86_64 host.

Originally reported at:
    https://bugs.gentoo.org/672032

Minimal reproducer:

  $ cat nc.c
  void i();
  short a;
  void b(e) char * e;
  {
    i();
    b(a);
  }


  $ LANG=C sparc-unknown-linux-gnu-gcc-7.3.0 -Wall -O2 -pipe -o nc.o -c nc.c
  nc.c: In function 'b':
  nc.c:7:1: internal compiler error: Segmentation fault

  $ LANG=C powerpc-unknown-linux-gnu-gcc -Wall -O2 -pipe -o nc.o -c nc.c
  nc.c: In function 'b':
  nc.c:7:1: internal compiler error: Segmentation fault

Note: it seems to be triggered by K&R-style function declarations.

Short backtrace from powerpc-unknown-linux-gnu-gcc-7.3.0:

$ gdb --args /usr/libexec/gcc/powerpc-unknown-linux-gnu/7.3.0/cc1 -quiet -v
-D__unix__ -D__gnu_linux__ -D__linux__ -Dunix -D__unix -Dlinux -D__linux
-Asystem=linux -Asystem=unix -Asystem=posix nc.c -msecure-plt -quiet -dumpbase
nc.c -auxbase-strip nc.o -O2 -Wall -version -o /tmp/ccYGzVuI.s

Program received signal SIGSEGV, Segmentation fault.
0x1020a4ec in bitmap_intersect_p(bitmap_head const*, bitmap_head const*) ()
(gdb) bt
#0  0x1020a4ec in bitmap_intersect_p(bitmap_head const*, bitmap_head const*) ()
#1  0x107ed1ec in pt_solutions_intersect(pt_solution*, pt_solution*) ()
#2  0x10726524 in call_may_clobber_ref_p_1(gcall*, ao_ref*) ()
#3  0x10726bf0 in stmt_may_clobber_ref_p_1(gimple*, ao_ref*) ()
#4  0x1046c2e4 in ?? ()
#5  0x10471a50 in ?? ()
#6  0x10472878 in analysis_dom_walker::before_dom_children(basic_block_def*) ()
#7  0x10c00160 in dom_walker::walk(basic_block_def*) ()
#8  0x104708f8 in ipa_analyze_node(cgraph_node*) ()
#9  0x10c52378 in ?? ()
#10 0x1056a14c in execute_ipa_summary_passes(ipa_opt_pass_d*) ()
#11 0x10278a20 in ?? ()
#12 0x1027a9f0 in symbol_table::finalize_compilation_unit() ()
#13 0x10648bd8 in ?? ()
#14 0x1011dfd4 in toplev::main(int, char**) ()
#15 0x1011f570 in main ()