[Bug lto/55703] [4.8 Regression] ICE: in lto_fixup_prevailing_decls, at lto/lto.c:2732 in gcc.c-torture/execute/920721-4.c

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55703

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-19 13:53:32 UTC ---
Author: rguenth
Date: Wed Dec 19 13:53:18 2012
New Revision: 194609

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194609
Log:
2012-12-19  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/55736
    PR tree-optimization/55703
    * gimplify.c (prune_expr_location): New function.
    (unshare_expr_without_location): Likewise.
    * tree.h (unshare_expr_without_location): Declare.
    * ipa-prop.c (prune_expression_for_jf): Remove.
    (prune_expression_for_jf_1): Likewise.
    (ipa_set_jf_constant): Use unshare_expr_without_location.
    (ipa_set_jf_arith_pass_through): Likewise.
    (determine_known_aggregate_parts): Likewise.
    * tree-switch-conversion.c (build_constructors): Use
    unshare_expr_without_location on all constructor elements.

    * gcc.dg/lto/pr55703_0.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/lto/pr55703_0.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimplify.c
    trunk/gcc/ipa-prop.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-switch-conversion.c
    trunk/gcc/tree.h