[Bug middle-end/61268] New: [4.10 regression] ICE in vt_expand_var_loc_chain, at var-tracking.c:8262

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61268

            Bug ID: 61268
           Summary: [4.10 regression] ICE in vt_expand_var_loc_chain, at
                    var-tracking.c:8262
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ro at gcc dot gnu.org
                CC: ebotcazou at gcc dot gnu.org
              Host: sparc-sun-solaris2.11
            Target: sparc-sun-solaris2.11
             Build: sparc-sun-solaris2.11

Between 20140516 (r210514) and 20140520 (r210655) a new testsuite failure
occured, both 32 and 64-bit:

FAIL: gcc.c-torture/compile/limits-fndefn.c  -O3 -g  (internal compiler error)
FAIL: gcc.c-torture/compile/limits-fndefn.c  -O3 -g  (test for excess errors)

/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.c-torture/compile/limits-fndefn.c:19:1:
internal compiler error: in vt_expand_var_loc_chain, at var-tracking.c:8262
0x9b06d7 vt_expand_var_loc_chain
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8262
0x9b06d7 vt_expand_loc_callback
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8458
0x371903 cselib_expand_value_rtx_1
        /vol/gcc/src/hg/trunk/local/gcc/cselib.c:1691
0x3716df cselib_expand_value_rtx_1
        /vol/gcc/src/hg/trunk/local/gcc/cselib.c:1729
0x373193 cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def*
(*)(rtx_def*, bitmap_head*, int, void*), void*)
        /vol/gcc/src/hg/trunk/local/gcc/cselib.c:1538
0x9        /vol/gcc/src/hg/trunk/local/gcc/cselib.c:1538
0x9afd4f vt_expand_var_loc_chain
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8296
0x9afd4f vt_expand_loc_callback
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8458
0x371903 cselib_expand_value_rtx_1
        /vol/gcc/src/hg/trunk/local/gcc/cselib.c:1691
0x3716df cselib_expand_value_rtx_1
        /vol/gcc/src/hg/trunk/local/gcc/cselib.c:1729
0x373193 cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def*
(*)(rtx_def*, bitmap_head*, int, void*), void*)
        /vol/gcc/src/hg/trunk/local/gcc/cselib.c:1538
0x9afd4f vt_expand_var_loc_chain
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8296
0x9afd4f vt_expand_loc_callback
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8458
0x371903 cselib_expand_value_rtx_1
        /vol/gcc/src/hg/trunk/local/gcc/cselib.c:1691
0x373193 cselib_expand_value_rtx_cb(rtx_def*, bitmap_head*, int, rtx_def*
(*)(rtx_def*, bitmap_head*, int, void*), void*)
        /vol/gcc/src/hg/trunk/local/gcc/cselib.c:1538
0x9a43fb vt_expand_var_loc_chain
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8296
afd4f vt_expand_var_loc_chain
0x9a43fb vt_expand_var_loc_chain
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8296
0x9a43fb vt_expand_1pvar
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8571
0x9a43fb emit_note_insn_var_location(variable_def**, emit_note_data_def*)
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8625
0x9b3613 traverse_noresize<emit_note_data_def*, emit_note_insn_var_location>
        /vol/gcc/src/hg/trunk/local/gcc/hash-table.h:928
0x9b3613 traverse<emit_note_data_def*, emit_note_insn_var_location>
        /vol/gcc/src/hg/trunk/local/gcc/hash-table.h:950
0x9b3613 emit_notes_for_changes
        /vol/gcc/src/hg/trunk/local/gcc/var-tracking.c:8985