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+2012-08-13 Steven Bosscher <steven@gcc.gnu.org>
+
+ * tree-ssa-pre.c (do_regular_insertion): Add FIXME markers at points
+ of potentially huge memset overhead.
+ (do_partial_partial_insertion): Likewise.
+ * cfgexpand.c (gimple_expand_cfg): Use XCNEWVEC instead of xcalloc.
+ * tree-vrp.c (find_assert_locations): Use XNEWVEC instead of XCNEWVEC
+ for arrays to be filled by pre_and_rev_post_order_compute. Allocate
+ the right number of slots, not that number plus NUM_FIXED_BLOCKS.
+ * tree-ssa-reassoc.c (init_reassoc): Likewise.
+ * cfganal.c (dfs_enumerate_from): Use XNEWVEC instead of XCNEWVEC for
+ array used as stack.
+ * tree-ssa-sccvn.c (init_scc_vn): Use XNEWVEC instead of XCNEWVEC for
+ arrays to be filled by pre_and_rev_post_order_compute.
+ * cfgloopmanip.c (find_path): Use XNEWVEC instead of XCNEWVEC for
+ array to be filled by dfs_enumerate_from.
+ (remove_path): Likewise.
+ (duplicate_loop_to_header_edge): Use XNEWVEC instead of XCNEWVEC for
+ array of loops that is filled on the next lines.
+ * cfgloop.c (get_loop_body): Use XNEWVEC instead of XCNEWVEC for
+ array of basic blocks to be returned.
+ (get_loop_body_in_dom_order): Likewise.
+ (get_loop_body_in_bfs_order): Likewise.
+ * tree-ssa-loop-manip.c (loop_renamer_obstack): New static obstack
+ for all bitmaps used for rewriting into loop-closed SSA form.
+ (add_exit_phis_var): Allocate the def bitmap on it. Clear the livein
+ bitmap at the end to release a lot of memory.
+ (add_exit_phis): Allocate the exits bitmap on the new obstack.
+ (get_loops_exits): Allocate the exits bitmap on the new obstack.
+ (find_uses_to_rename_use): Allocate a use_blocks bitmap if ver is
+ seen for the first time.
+ (find_uses_to_rename): Add "???" for why the whole function must
+ be re-scanned if changed_bbs is empty.
+ (rewrite_into_loop_closed_ssa): Allocate bitmaps on the new obstack.
+ Use XNEWVEC to allocate the use_blocks array. Initialize the new
+ obstack, and free it at the end. Remove loop over all SSA names.
+ (check_loop_closed_ssa_stmt): Look only at SSA_OP_USE operands.
+ * tree-cfg.c (move_sese_region_to_fn): Use XNEWVEC instead of
+ xcalloc to allocate edge_pred and edge_flag arrays.
+
2012-08-13 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.h (FIXED_REGISTERS): Do not mark REX registers here.