[PTR-PLUS] Fix PR 32225: ICE in alias.c with INDIRECT_REF to a INTEGER_TYPE

[Andrew_Pinski at PlayStation dot Sony dot Com]

Hi,
  The problem here is that SCCP (via scalar evolution) was creating an 
assignment to a pointer type with an integer.  The problem here is that I 
(and Zdenek as he originally did this part) misunderstood that the 
type_rhs in follow_ssa_edge_in_rhs mean the type of the right hand side of 
the assignment and not the right hand side of the PLUS operator.  This 
patch fixes it by reverting part of the original patch that fixed up scev 
and changes it so we use the code (PLUS_EXPR or POINTER_PLUS_EXPR) in the 
call to add_to_evolution.

Committed to the branch after a build/test on spu-elf with no regressions.

Thanks,
Andrew Pinski

ChangeLog:

        * tree-scalar-evolution.c (follow_ssa_edge_in_rhs <case 
POINTER_PLUS_EXPR>):
        Do not change type_rhs.
        (follow_ssa_edge_in_rhs <case POINTER_PLUS_EXPR, case PLUS_EXPR>):
        Use the code of the orginal expression instead of just PLUS_EXPR. 
Also
        use type_rhs where TREE_TYPE (rhs) was used (reverting back to the 
trunk).

        * gcc.c-torture/compile/20070605-1.c: New test.

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