[Bug c++/50243] vtable for pure abstract class (interface) shouldn't be emitted

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50243

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-04-08 13:51:07 UTC ---
Author: jakub
Date: Mon Apr  8 13:46:00 2013
New Revision: 197580

URL: http://gcc.gnu.org/viewcvs?rev=197580&root=gcc&view=rev
Log:
    PR c++/34949
    PR c++/50243
    * tree-eh.c (optimize_clobbers): Only remove clobbers if bb doesn't
    contain anything but clobbers, at most one __builtin_stack_restore,
    optionally debug stmts and final resx, and if it has at least one
    incoming EH edge.  Don't check for SSA_NAME on LHS of a clobber.
    (sink_clobbers): Don't check for SSA_NAME on LHS of a clobber.
    Instead of moving clobbers with MEM_REF LHS with SSA_NAME address
    which isn't defaut definition, remove them.
    (unsplit_eh, cleanup_empty_eh): Use single_{pred,succ}_{p,edge}
    instead of EDGE_COUNT comparisons or EDGE_{PRED,SUCC}.
    * tree-ssa-ccp.c (execute_fold_all_builtins): Remove clobbers
    with MEM_REF LHS with SSA_NAME address.

    * g++.dg/opt/vt3.C: New test.
    * g++.dg/opt/vt4.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/opt/vt3.C
    trunk/gcc/testsuite/g++.dg/opt/vt4.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-eh.c
    trunk/gcc/tree-ssa-ccp.c