[Bug tree-optimization/29788] [4.1/4.2/4.3 Regression] ICE in var_ann, at tree-flow-inline.h:130

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

------- Comment #7 from rguenth at gcc dot gnu dot org  2006-11-10 10:40 -------
4.0.3 works.

VN in set_value_handle sets a TREE_ANN_COMMON on the CONST_DECL of C.1346. 
With
-fno-tree-pre -fno-tree-fre we get a different ICE:

Program received signal SIGSEGV, Segmentation fault.
0x0000000000ad5313 in var_to_partition (map=0x1050580, var=0x2b4416691d20)
    at /space/rguenther/src/svn/trunk/gcc/tree-ssa-live.h:150
150           if (ann->out_of_ssa_tag)

because now we don't have an annotation for the CONST_DECL at all.

Somehow seeing CONST_DECLs seriously confuses us.  The following patch fixes
it for me:

Index: tree-ssa-live.c
===================================================================
*** tree-ssa-live.c     (revision 118621)
--- tree-ssa-live.c     (working copy)
*************** build_tree_conflict_graph (tree_live_inf
*** 1455,1461 ****
              else 
                p1 = NO_PARTITION;

!             if (DECL_P (rhs) || TREE_CODE (rhs) == SSA_NAME)
                p2 = var_to_partition (map, rhs);
              else 
                p2 = NO_PARTITION;
--- 1455,1462 ----
              else 
                p1 = NO_PARTITION;

!             if ((DECL_P (rhs) || TREE_CODE (rhs) == SSA_NAME)
!                 && TREE_CODE (rhs) != CONST_DECL)
                p2 = var_to_partition (map, rhs);
              else 
                p2 = NO_PARTITION;


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org, amacleod at redhat dot
                   |                            |com
      Known to work|                            |4.0.3
            Summary|[Optimization] ICE in       |[4.1/4.2/4.3 Regression] ICE
                   |var_ann, at tree-flow-      |in var_ann, at tree-flow-
                   |inline.h:130                |inline.h:130


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29788