[Bug rtl-optimization/98347] New: [11 Regression] gcc.dg/long_branch.c ICEs on i686-linux

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98347

            Bug ID: 98347
           Summary: [11 Regression] gcc.dg/long_branch.c ICEs on
                    i686-linux
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
  Target Milestone: ---

during RTL pass: fwprop1
/home/jakub/src/gcc/gcc/testsuite/gcc.dg/long_branch.c: In function
'test_and_branch':
/home/jakub/src/gcc/gcc/testsuite/gcc.dg/long_branch.c:185:1: internal compiler
error: Segmentation fault
0x8b940ba crash_signal
        ../../gcc/toplev.c:327
0x97490e1 rtl_ssa::full_register(unsigned int)
        ../../gcc/rtl-ssa/access-utils.h:26
0x97490e1
rtl_ssa::function_info::add_entry_block_defs(rtl_ssa::function_info::build_info&)
        ../../gcc/rtl-ssa/blocks.cc:508
0x974bbfe rtl_ssa::function_info::process_all_blocks()
        ../../gcc/rtl-ssa/blocks.cc:1058
0x96cc708 rtl_ssa::function_info::function_info(function*)
        ../../gcc/rtl-ssa/functions.cc:49
0x95a834a fwprop_init
        ../../gcc/fwprop.c:881
0x95a834a fwprop
        ../../gcc/fwprop.c:951
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Please include the complete backtrace with any bug report.
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compiler exited with status 1
FAIL: gcc.dg/long_branch.c (internal compiler error)
FAIL: gcc.dg/long_branch.c (test for excess errors)

It didn't fail 2 days ago, I suspect the RTL SSA changes.