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2014-01-17 Richard Biener <rguenther@suse.de> PR tree-optimization/46590 * vec.h (vec<>::bseach): New member function implementing binary search according to C89 bsearch. (vec<>::qsort): Avoid calling ::qsort for vectors with sizes 0 or 1. * tree-ssa-loop-im.c (struct mem_ref): Make stored member a bitmap pointer again. Make accesses_in_loop a flat array. (mem_ref_obstack): New global. (outermost_indep_loop): Adjust for mem_ref->stored changes. (mark_ref_stored): Likewise. (ref_indep_loop_p_2): Likewise. (set_ref_stored_in_loop): New helper function. (mem_ref_alloc): Allocate mem_refs on the mem_ref_obstack obstack. (memref_free): Adjust. (record_mem_ref_loc): Simplify. (gather_mem_refs_stmt): Adjust. (sort_locs_in_loop_postorder_cmp): New function. (analyze_memory_references): Sort accesses_in_loop after loop postorder number. (find_ref_loc_in_loop_cmp): New function. (for_all_locs_in_loop): Find relevant cluster of locs in accesses_in_loop and iterate without recursion. (execute_sm): Avoid uninit warning. (struct ref_always_accessed): Simplify. (ref_always_accessed::operator ()): Likewise. (ref_always_accessed_p): Likewise. (tree_ssa_lim_initialize): Initialize mem_ref_obstack, compute loop postorder numbers here. (tree_ssa_lim_finalize): Free mem_ref_obstack and loop postorder numbers. From-SVN: r206709
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