[Bug lto/64043] [5 Regression] ICE (segfault) with LTO: in tree_check/tree.h:2758 get_binfo_at_offset/tree.c:11914

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64043

--- Comment #7 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Now fails with the following backtrace. The location of the failure might have
changed due to the patch at
https://gcc.gnu.org/ml/gcc-patches/2014-12/msg01076.html ; in any case,
currently the failure is:


foo.ii: In member function ‘__base_dtor ’:
foo.ii:11:1: internal compiler error: Segmentation fault
 FooWriter::~FooWriter () { delete validator; }
 ^
0xa1f99f crash_signal
        ../../gcc/toplev.c:358
0x873daf tree_check(tree_node*, char const*, int, char const*, tree_code)
        ../../gcc/tree.h:2778
0x873daf ipa_polymorphic_call_context::get_dynamic_type(tree_node*, tree_node*,
tree_node*, gimple_statement_base*)
0xb9787e eliminate_dom_walker::before_dom_children(basic_block_def*)
        ../../gcc/tree-ssa-pre.c:4334
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Subject: [Bug middle-end/64182] [5 Regression] wide-int rounding division is broken
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd182

--- Comment #9 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Fri Dec 12 15:46:57 2014
New Revision: 218678

URL: https://gcc.gnu.org/viewcvs?rev!8678&root=gcc&view=rev
Log:
gcc/
    PR middle-end/64182
    * wide-int.h (wi::div_round, wi::mod_round): Fix rounding of tied
    cases.
    * double-int.c (div_and_round_double): Fix handling of unsigned
    cases.  Use same rounding approach as wide-int.h.

gcc/testsuite/
2014-xx-xx  Richard Sandiford  <richard.sandiford@arm.com>
        Joseph Myers  <joseph@codesourcery.com>

    PR middle-end/64182
    * gcc.dg/plugin/wide-int-test-1.c,
    gcc.dg/plugin/wide-int_plugin.c: New test.
    * gcc.dg/plugin/plugin.exp: Register it.
    * gnat.dg/round_div.adb: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/plugin/wide-int-test-1.c
    trunk/gcc/testsuite/gcc.dg/plugin/wide-int_plugin.c
    trunk/gcc/testsuite/gnat.dg/round_div.adb
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/double-int.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/plugin/plugin.exp
    trunk/gcc/wide-int.h