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+2012-03-28 Richard Guenther <rguenther@suse.de>
+
+ * loop-init.c (loop_optimizer_init): If loops are preserved
+ perform incremental initialization of required loop features.
+ (loop_optimizer_finalize): If loops are to be preserved only
+ clean up optional loop features.
+ (rtl_loop_done): Forcefully free loops here.
+ * cgraph.c (cgraph_release_function_body): Forcefully free
+ loops.
+ * cfgexpand.c (expand_gimple_cond): Properly add new basic-blocks
+ to existing loops.
+ (construct_init_block): Likewise.
+ (construct_exit_block): Likewise.
+ (gimple_expand_cfg): Clear LOOP_CLOSED_SSA loop state. Cleanup
+ the CFG after expanding.
+ * cfgloop.c (verify_loop_structure): Calculate or verify
+ dominators. If we needed to calculate them, free them afterwards.
+ * tree-pass.h (PROP_loops): New define.
+ * tree-ssa-loop.c (pass_tree_loop_init): Provide PROP_loops.
+ * basic-block.h (CLEANUP_CFG_CHANGED): New.
+ * cfgcleanup.c (merge_blocks_move): Protect loop latches.
+ (cleanup_cfg): If we did something and have loops around, fix
+ them up.
+ * cse.c (rest_of_handle_cse_after_global_opts): Call cleanup_cfg
+ with CLEANUP_CFG_CHANGED.
+ * cfghooks.c (merge_blocks): If we merge a loop header into
+ its predecessor, update the loop structure.
+ (duplicate_block): If we copy a loop latch, adjust loop state
+ to note we may have multiple latches.
+ (delete_basic_block): Mark loops for fixup if we remove a loop.
+ * cfganal.c (forwarder_block_p): Protect loop latches, headers
+ and preheaders.
+ * cfgrtl.c (rtl_can_merge_blocks): Protect loop latches.
+ (cfg_layout_can_merge_blocks_p): Likewise.
+ * cprop.c (bypass_block): If we create a loop with multiple
+ entries, mark it for removal.
+ * except.c (emit_to_new_bb_before): Add the new basic-block
+ to existing loops.
+ * tree-eh.c (lower_resx): Likewise.
+ * omp-low.c (finalize_task_copyfn): Do not copy PROP_loops.
+ (expand_omp_taskreg): Likewise.
+ * tree-inline.c (initialize_cfun): Likewise.
+ * tree-mudflap.c (add_bb_to_loop): Prototype.
+ (mf_build_check_statement_for): Properly add new basic-blocks
+ to existing loops.
+ * tree-ssa-threadupdate.c (thread_block): Mark loops for fixup
+ if we remove a loop.
+ (thread_through_loop_header): Likewise.
+ * trans-mem.c (tm_log_emit_save_or_restores): Properly add
+ new basic-blocks to existing loops.
+ (expand_transaction): Likewise.
+ * Makefile.in (except.o): Add $(CFGLOOP_H).
+ (expr.o): Likewise.
+ (cgraph.o): Likewise.
+ (cprop.o): Likewise.
+ (cfgexpand.o): Likewise.
+ (cfganal.o): Likewise.
+ (trans-mem.o): Likewise.
+ (tree-eh.o): Likewise.
+
2012-03-28 Georg-Johann Lay <avr@gjlay.de>
PR target/52692