[Bug tree-optimization/82493] New: UBSAN in gcc/sbitmap.c:368:28: runtime error: shift exponent 64 is too large for 64-bit type 'long unsigned int'

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82493

            Bug ID: 82493
           Summary: UBSAN in gcc/sbitmap.c:368:28: runtime error: shift
                    exponent 64 is too large for 64-bit type 'long
                    unsigned int'
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: law at gcc dot gnu.org
  Target Milestone: ---

With bootstrap-ubsan I see:

UBSAN_OPTIONS="print_stacktrace=1" ./xgcc -B.
/home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/vect/pr79920.c  -O3
-fno-vect-cost-model
../../gcc/sbitmap.c:368:28: runtime error: shift exponent 64 is too large for
64-bit type 'long unsigned int'
    #0 0x3b424ba in bitmap_bit_in_range_p(simple_bitmap_def const*, unsigned
int, unsigned int) ../../gcc/sbitmap.c:368
    #1 0x20a3533 in live_bytes_read ../../gcc/tree-ssa-dse.c:496
    #2 0x20a390f in dse_classify_store ../../gcc/tree-ssa-dse.c:594
    #3 0x20a45e7 in dse_dom_walker::dse_optimize_stmt(gimple_stmt_iterator*)
../../gcc/tree-ssa-dse.c:820
    #4 0x20a47d1 in dse_dom_walker::before_dom_children(basic_block_def*)
../../gcc/tree-ssa-dse.c:852
    #5 0x36f262c in dom_walker::walk(basic_block_def*) ../../gcc/domwalk.c:308
    #6 0x20a4b49 in execute ../../gcc/tree-ssa-dse.c:906
    #7 0x18f223a in execute_one_pass(opt_pass*) ../../gcc/passes.c:2495
    #8 0x18f2bcb in execute_pass_list_1 ../../gcc/passes.c:2584
    #9 0x18f2c80 in execute_pass_list_1 ../../gcc/passes.c:2585
    #10 0x18f2d1f in execute_pass_list(function*, opt_pass*)
../../gcc/passes.c:2595
    #11 0xd34522 in cgraph_node::expand() ../../gcc/cgraphunit.c:2115
    #12 0xd35b07 in expand_all_functions ../../gcc/cgraphunit.c:2251
    #13 0xd38201 in symbol_table::compile() ../../gcc/cgraphunit.c:2599
    #14 0xd38958 in symbol_table::finalize_compilation_unit()
../../gcc/cgraphunit.c:2692
    #15 0x1cdc527 in compile_file ../../gcc/toplev.c:481
    #16 0x1ce2c84 in do_compile ../../gcc/toplev.c:2037
    #17 0x1ce32b3 in toplev::main(int, char**) ../../gcc/toplev.c:2172
    #18 0x3aaf9e0 in main ../../gcc/main.c:39
    #19 0x14f842659f49 in __libc_start_main (/lib64/libc.so.6+0x20f49)
    #20 0x7d93b9 in _start
(/home/marxin/Programming/gcc2/objdir/gcc/cc1+0x7d93b9)