2006-02-16 Jeff Law <law@redhat.com>
+ * tree-vrp.c (set_value_range_to_nonnegative): New function.
+ (vrp_expr_computes_nonnegative, ssa_name_nonnegative_p): Likewise.
+ (ssa_name_nonzero_p): Likewise.
+ (get_value_range): Return NULL if VRP is not running.
+ (extract_range_from_expr): Fallback to tree_expr_XXX_p if
+ VRP routines do not discover a range.
+ (vrp_finalize): Clear VR_VALUE to indicate VRP is not running.
+ * tree.h (ssa_name_nonzero_p, ssa_name_nonnegative_p): Prototype.
+ * fold-const.c (tree_expr_nonzero_p): For SSA_NAMEs, query VRP.
+ (tree_expr_nonnegative_p): Similarly.
+ * tree-ssa-dom.c (nonzero_vars, nonzero_vars_stack): Remove.
+ (restore_nonzero_vars_to_original_value): Remove.
+ (unsafe_associative_fp_binop): Remove.
+ (tree_ssa_dominator_optimize): Remove initialization and
+ finalization of nonzero_vars and nonzero_vars_stack.
+ (dom_opt_initialize_block): No longer push marker on
+ nonzero_vars_stack.
+ (dom_opt_finalize_block): No longer call
+ restore_nonzero_vars_to_original_value.
+ (record_equivalences_from_phis): No longer look for
+ nonzero PHI arguments.
+ (cprop_into_successor_phis): No longer propagate nonzero
+ property into PHI arguments. Lose unused argument. Caller
+ updated.
+ (record_equivalences_from_stmt): No longer record nonzero
+ values for SSA_NAMEs.
+ (lookup_avail_expr): No longer use nonzero_vars.
+
* stor-layout.c (set_sizetype): Set TYPE_MAX_VALUE properly
for sizetype when sizetype is unsigned.
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