[Bug rtl-optimization/111822] [12/13/14 Regression] during RTL pass: lr_shrinkage ICE: in operator[], at vec.h:910 with -O2 -m32 -flive-range-shrinkage -fno-dce -fnon-call-exceptions

["sjames at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111822

Sam James <sjames at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sjames at gcc dot gnu.org

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
I was confused at first while just checking the range because 10 has a
different ICE:

$ g++-10 /tmp/foo.cxx -o /tmp/foo -c -O2 -m32 -flive-range-shrinkage -fno-dce
-fnon-call-exceptions
during RTL pass: lr_shrinkage
/tmp/foo.cxx: In member function 'void SQVM::CallNative()':
/tmp/foo.cxx:41:1: internal compiler error: Segmentation fault
   41 | }
      | ^
0xc86baf crash_signal
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/toplev.c:328
0x84d9a6 pre_and_rev_post_order_compute_fn(function*, int*, int*, bool)
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/cfganal.c:1036
0x84db87 pre_and_rev_post_order_compute(int*, int*, bool)
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/cfganal.c:1049
0x81c940 init_alias_analysis()
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/alias.c:3391
0x14d9f91 sched_init()
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/haifa-sched.c:7326
0x14e4ebd haifa_sched_init()
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/haifa-sched.c:7363
0xc3e02b schedule_insns()
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/sched-rgn.c:3514
0xc3e6db schedule_insns()
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/sched-rgn.c:3508
0xc3e6db rest_of_handle_live_range_shrinkage
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/sched-rgn.c:3710
0xc3e6db execute
        /usr/src/debug/sys-devel/gcc-10.5.0/gcc-10.5.0/gcc/sched-rgn.c:3797
Please submit a full bug report,
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Anyway, bisecting.