[Bug lto/61886] [4.9/5/6 Regression] LTO breaks fread with _FORTIFY_SOURCE=2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61886

--- Comment #47 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Wed Dec  9 07:34:16 2015
New Revision: 231442

URL: https://gcc.gnu.org/viewcvs?rev=231442&root=gcc&view=rev
Log:

        PR ipa/61886
        PR middle-end/25140
        * ipa-reference.c (is_improper): Break out from ...
        (is_proper_for_analysis): ... here; fix WRT aliases.
        (analyze_function, generate_summary,
        ipa_reference_write_optimization_summary,
        ipa_reference_read_optimization_summary): Use ipa_reference_var_uid.
        * ipa-refrence.h (ipa_reference_var_uid): New inline.
        * tree-ssa-alias.c (ref_maybe_used_by_call_p_1,
        call_may_clobber_ref_p_1): Use ipa_reference_var_uid.

        * gcc.c-torture/execute/alias-3.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/alias-3.c
Modified:
    trunk/gcc/ipa-reference.c
    trunk/gcc/ipa-reference.h
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-alias.c