[Bug sanitizer/94191] New: ubsan bootstrap memory hog with -enable-checking=rtl

[zhroma at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94191

            Bug ID: 94191
           Summary: ubsan bootstrap memory hog with -enable-checking=rtl
           Product: gcc
           Version: 9.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zhroma at gcc dot gnu.org
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
  Target Milestone: ---

On 64Gb RAM x86_64 box using 9.3 sources and running:
<src>/configure --enable-languages=c,c++ --with-build-config=bootstrap-ubsan
--enable-checking=rtl;  make

During stage2 insn-extract.c compilation was stopped by OOM killer.  It really
wants 60+ Gb of memory.

--
Yeah, it's a bit crazy checking options and not sure we have to bother about
it.