tree-data-ref.c (have_similar_memory_accesses_1): Remove.
2012-06-04 Richard Guenther <rguenther@suse.de> * tree-data-ref.c (have_similar_memory_accesses_1): Remove. (ref_base_address_1): Likewise. (remove_similar_memory_refs): Likewise. * tree-data-ref.h (remove_similar_memory_refs): Remove. * tree-loop-distribution.c (classify_partition): Do not classify as builtin if -ftree-loop-distribute-patterns is not enabled. (fuse_partitions_with_similar_memory_accesses): Inline ... (ldist_gen): ... here. Fuse all non-builtin partitions if -ftree-loop-distribution is not enabled. Properly return the number of created partitions. Do not update SSA form here but ... (tree_loop_distribution): ... once here for the whole function. Only walk innermost loops, constrain loops we consider here further. Do not call remove_similar_memory_refs. (distribute_loop): Do not check number of loop nodes here. * gcc.dg/tree-ssa/ldist-11.c: Enable -ftree-loop-distribute-patterns. * gcc.dg/tree-ssa/ldist-17.c: Likewise. * gcc.dg/tree-ssa/ldist-pr45948.c: Likewise. From-SVN: r188168
This commit is contained in:
parent
296f202e8e
commit
c014f6f54b
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@ -1,3 +1,21 @@
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2012-06-04 Richard Guenther <rguenther@suse.de>
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* tree-data-ref.c (have_similar_memory_accesses_1): Remove.
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(ref_base_address_1): Likewise.
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(remove_similar_memory_refs): Likewise.
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* tree-data-ref.h (remove_similar_memory_refs): Remove.
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* tree-loop-distribution.c (classify_partition): Do not classify
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as builtin if -ftree-loop-distribute-patterns is not enabled.
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(fuse_partitions_with_similar_memory_accesses): Inline ...
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(ldist_gen): ... here. Fuse all non-builtin partitions if
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-ftree-loop-distribution is not enabled. Properly return
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the number of created partitions. Do not update SSA form here
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but ...
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(tree_loop_distribution): ... once here for the whole function.
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Only walk innermost loops, constrain loops we consider here
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further. Do not call remove_similar_memory_refs.
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(distribute_loop): Do not check number of loop nodes here.
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2012-06-04 Steven Bosscher <steven@gcc.gnu.org>
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2012-06-04 Steven Bosscher <steven@gcc.gnu.org>
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* Makefile.in (GIMPLE_H): Do not depend on TARGET_H.
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* Makefile.in (GIMPLE_H): Do not depend on TARGET_H.
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@ -1,3 +1,9 @@
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2012-06-04 Richard Guenther <rguenther@suse.de>
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* gcc.dg/tree-ssa/ldist-11.c: Enable -ftree-loop-distribute-patterns.
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* gcc.dg/tree-ssa/ldist-17.c: Likewise.
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* gcc.dg/tree-ssa/ldist-pr45948.c: Likewise.
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2012-06-03 Alessandro Fanfarillo <fanfarillo.gcc@gmail.com>
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2012-06-03 Alessandro Fanfarillo <fanfarillo.gcc@gmail.com>
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PR fortran/48831
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PR fortran/48831
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@ -1,5 +1,5 @@
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/* { dg-do compile } */
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/* { dg-do compile } */
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/* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-all" } */
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/* { dg-options "-O2 -ftree-loop-distribution -ftree-loop-distribute-patterns -fdump-tree-ldist-all" } */
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void foo (int * __restrict__ ia,
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void foo (int * __restrict__ ia,
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int * __restrict__ ib,
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int * __restrict__ ib,
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@ -1,5 +1,5 @@
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/* { dg-do compile } */
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/* { dg-do compile } */
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/* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-details" } */
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/* { dg-options "-O2 -ftree-loop-distribution -ftree-loop-distribute-patterns -fdump-tree-ldist-details" } */
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typedef int mad_fixed_t;
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typedef int mad_fixed_t;
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struct mad_pcm
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struct mad_pcm
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@ -1,5 +1,5 @@
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/* { dg-do compile } */
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/* { dg-do compile } */
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/* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-details" } */
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/* { dg-options "-O2 -ftree-loop-distribution -ftree-loop-distribute-patterns -fdump-tree-ldist-details" } */
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extern void bar(int);
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extern void bar(int);
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@ -5403,65 +5403,3 @@ have_similar_memory_accesses (gimple s1, gimple s2)
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VEC_free (data_ref_loc, heap, refs2);
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VEC_free (data_ref_loc, heap, refs2);
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return res;
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return res;
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}
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}
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/* Helper function for the hashtab. */
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static int
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have_similar_memory_accesses_1 (const void *s1, const void *s2)
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{
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return have_similar_memory_accesses (CONST_CAST_GIMPLE ((const_gimple) s1),
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CONST_CAST_GIMPLE ((const_gimple) s2));
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}
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/* Helper function for the hashtab. */
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static hashval_t
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ref_base_address_1 (const void *s)
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{
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gimple stmt = CONST_CAST_GIMPLE ((const_gimple) s);
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unsigned i;
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VEC (data_ref_loc, heap) *refs;
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data_ref_loc *ref;
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hashval_t res = 0;
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get_references_in_stmt (stmt, &refs);
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FOR_EACH_VEC_ELT (data_ref_loc, refs, i, ref)
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if (!ref->is_read)
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{
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res = htab_hash_pointer (ref_base_address (stmt, ref));
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break;
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}
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VEC_free (data_ref_loc, heap, refs);
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return res;
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}
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/* Try to remove duplicated write data references from STMTS. */
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void
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remove_similar_memory_refs (VEC (gimple, heap) **stmts)
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{
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unsigned i;
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gimple stmt;
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htab_t seen = htab_create (VEC_length (gimple, *stmts), ref_base_address_1,
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have_similar_memory_accesses_1, NULL);
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for (i = 0; VEC_iterate (gimple, *stmts, i, stmt); )
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{
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void **slot;
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slot = htab_find_slot (seen, stmt, INSERT);
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if (*slot)
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VEC_ordered_remove (gimple, *stmts, i);
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else
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{
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*slot = (void *) stmt;
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i++;
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}
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}
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htab_delete (seen);
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}
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@ -607,7 +607,6 @@ index_in_loop_nest (int var, VEC (loop_p, heap) *loop_nest)
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void stores_from_loop (struct loop *, VEC (gimple, heap) **);
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void stores_from_loop (struct loop *, VEC (gimple, heap) **);
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void stores_zero_from_loop (struct loop *, VEC (gimple, heap) **);
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void stores_zero_from_loop (struct loop *, VEC (gimple, heap) **);
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void remove_similar_memory_refs (VEC (gimple, heap) **);
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bool rdg_defs_used_in_other_loops_p (struct graph *, int);
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bool rdg_defs_used_in_other_loops_p (struct graph *, int);
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bool have_similar_memory_accesses (gimple, gimple);
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bool have_similar_memory_accesses (gimple, gimple);
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bool stmt_with_adjacent_zero_store_dr_p (gimple);
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bool stmt_with_adjacent_zero_store_dr_p (gimple);
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@ -398,7 +398,28 @@ destroy_loop (struct loop *loop)
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rescan_loop_exit (exit, false, true);
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rescan_loop_exit (exit, false, true);
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for (i = 0; i < nbbs; i++)
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for (i = 0; i < nbbs; i++)
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{
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/* We have made sure to not leave any dangling uses of SSA
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names defined in the loop. With the exception of virtuals.
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Make sure we replace all uses of virtual defs that will remain
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outside of the loop with the bare symbol as delete_basic_block
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will release them. */
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gimple_stmt_iterator gsi;
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for (gsi = gsi_start_phis (bbs[i]); !gsi_end_p (gsi); gsi_next (&gsi))
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{
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gimple phi = gsi_stmt (gsi);
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if (!is_gimple_reg (gimple_phi_result (phi)))
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mark_virtual_phi_result_for_renaming (phi);
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}
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for (gsi = gsi_start_bb (bbs[i]); !gsi_end_p (gsi); gsi_next (&gsi))
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{
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gimple stmt = gsi_stmt (gsi);
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tree vdef = gimple_vdef (stmt);
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if (vdef && TREE_CODE (vdef) == SSA_NAME)
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mark_virtual_operand_for_renaming (vdef);
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}
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delete_basic_block (bbs[i]);
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delete_basic_block (bbs[i]);
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}
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free (bbs);
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free (bbs);
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set_immediate_dominator (CDI_DOMINATORS, dest,
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set_immediate_dominator (CDI_DOMINATORS, dest,
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@ -801,6 +822,9 @@ classify_partition (loop_p loop, struct graph *rdg, partition_t partition)
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partition->kind = PKIND_NORMAL;
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partition->kind = PKIND_NORMAL;
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partition->main_stmt = NULL;
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partition->main_stmt = NULL;
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if (!flag_tree_loop_distribute_patterns)
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return;
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/* Perform general partition disqualification for builtins. */
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/* Perform general partition disqualification for builtins. */
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nb_iter = number_of_exit_cond_executions (loop);
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nb_iter = number_of_exit_cond_executions (loop);
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if (!nb_iter || nb_iter == chrec_dont_know)
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if (!nb_iter || nb_iter == chrec_dont_know)
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return false;
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return false;
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}
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}
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/* Fuse all the partitions from PARTITIONS that contain similar memory
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references, i.e., we're taking care of cache locality. This
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function does not fuse those partitions that contain patterns that
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can be code generated with builtins. */
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static void
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fuse_partitions_with_similar_memory_accesses (struct graph *rdg,
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VEC (partition_t, heap) **partitions)
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{
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int p1, p2;
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partition_t partition1, partition2;
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FOR_EACH_VEC_ELT (partition_t, *partitions, p1, partition1)
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if (!partition_builtin_p (partition1))
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FOR_EACH_VEC_ELT (partition_t, *partitions, p2, partition2)
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if (p1 != p2
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&& !partition_builtin_p (partition2)
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&& similar_memory_accesses (rdg, partition1, partition2))
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{
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bitmap_ior_into (partition1->stmts, partition2->stmts);
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VEC_ordered_remove (partition_t, *partitions, p2);
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p2--;
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}
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}
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/* Aggregate several components into a useful partition that is
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/* Aggregate several components into a useful partition that is
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registered in the PARTITIONS vector. Partitions will be
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registered in the PARTITIONS vector. Partitions will be
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distributed in different loops. */
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distributed in different loops. */
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@ -1100,7 +1099,55 @@ ldist_gen (struct loop *loop, struct graph *rdg,
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FOR_EACH_VEC_ELT (partition_t, partitions, i, partition)
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FOR_EACH_VEC_ELT (partition_t, partitions, i, partition)
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classify_partition (loop, rdg, partition);
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classify_partition (loop, rdg, partition);
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fuse_partitions_with_similar_memory_accesses (rdg, &partitions);
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/* If we are only distributing patterns fuse all partitions that
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were not properly classified as builtins. Else fuse partitions
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with similar memory accesses. */
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if (!flag_tree_loop_distribution)
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{
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partition_t into;
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for (i = 0; VEC_iterate (partition_t, partitions, i, into); ++i)
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if (!partition_builtin_p (into))
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break;
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for (++i; VEC_iterate (partition_t, partitions, i, partition); ++i)
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if (!partition_builtin_p (partition))
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{
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bitmap_ior_into (into->stmts, partition->stmts);
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VEC_ordered_remove (partition_t, partitions, i);
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i--;
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}
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}
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else
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{
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partition_t into;
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int j;
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for (i = 0; VEC_iterate (partition_t, partitions, i, into); ++i)
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{
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if (partition_builtin_p (into))
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continue;
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for (j = i + 1;
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VEC_iterate (partition_t, partitions, j, partition); ++j)
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{
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if (!partition_builtin_p (partition)
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/* ??? The following is horribly inefficient,
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we are re-computing and analyzing data-references
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of the stmts in the partitions all the time. */
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&& similar_memory_accesses (rdg, into, partition))
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{
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if (dump_file && (dump_flags & TDF_DETAILS))
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{
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fprintf (dump_file, "fusing partitions\n");
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dump_bitmap (dump_file, into->stmts);
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dump_bitmap (dump_file, partition->stmts);
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fprintf (dump_file, "because they have similar "
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"memory accesses\n");
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}
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bitmap_ior_into (into->stmts, partition->stmts);
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VEC_ordered_remove (partition_t, partitions, j);
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j--;
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}
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}
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}
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}
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nbp = VEC_length (partition_t, partitions);
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nbp = VEC_length (partition_t, partitions);
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if (nbp == 0
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if (nbp == 0
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@ -1108,7 +1155,10 @@ ldist_gen (struct loop *loop, struct graph *rdg,
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&& !partition_builtin_p (VEC_index (partition_t, partitions, 0)))
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&& !partition_builtin_p (VEC_index (partition_t, partitions, 0)))
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|| (nbp > 1
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|| (nbp > 1
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&& partition_contains_all_rw (rdg, partitions)))
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&& partition_contains_all_rw (rdg, partitions)))
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{
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nbp = 0;
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goto ldist_done;
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goto ldist_done;
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}
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if (dump_file && (dump_flags & TDF_DETAILS))
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if (dump_file && (dump_flags & TDF_DETAILS))
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dump_rdg_partitions (dump_file, partitions);
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dump_rdg_partitions (dump_file, partitions);
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@ -1116,10 +1166,6 @@ ldist_gen (struct loop *loop, struct graph *rdg,
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FOR_EACH_VEC_ELT (partition_t, partitions, i, partition)
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FOR_EACH_VEC_ELT (partition_t, partitions, i, partition)
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generate_code_for_partition (loop, partition, i < nbp - 1);
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generate_code_for_partition (loop, partition, i < nbp - 1);
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rewrite_into_loop_closed_ssa (NULL, TODO_update_ssa);
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mark_sym_for_renaming (gimple_vop (cfun));
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update_ssa (TODO_update_ssa_only_virtuals);
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ldist_done:
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ldist_done:
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BITMAP_FREE (remaining_stmts);
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BITMAP_FREE (remaining_stmts);
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@ -1152,16 +1198,6 @@ distribute_loop (struct loop *loop, VEC (gimple, heap) *stmts)
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VEC (data_reference_p, heap) *datarefs;
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VEC (data_reference_p, heap) *datarefs;
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VEC (loop_p, heap) *loop_nest;
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VEC (loop_p, heap) *loop_nest;
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if (loop->num_nodes > 2)
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{
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if (dump_file && (dump_flags & TDF_DETAILS))
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fprintf (dump_file,
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"FIXME: Loop %d not distributed: it has more than two basic blocks.\n",
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loop->num);
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return res;
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}
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datarefs = VEC_alloc (data_reference_p, heap, 10);
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datarefs = VEC_alloc (data_reference_p, heap, 10);
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dependence_relations = VEC_alloc (ddr_p, heap, 100);
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dependence_relations = VEC_alloc (ddr_p, heap, 100);
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loop_nest = VEC_alloc (loop_p, heap, 3);
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loop_nest = VEC_alloc (loop_p, heap, 3);
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@ -1215,48 +1251,38 @@ tree_loop_distribution (void)
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{
|
{
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struct loop *loop;
|
struct loop *loop;
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loop_iterator li;
|
loop_iterator li;
|
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int nb_generated_loops = 0;
|
bool changed = false;
|
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|
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FOR_EACH_LOOP (li, loop, 0)
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/* We can at the moment only distribute non-nested loops, thus restrict
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|
walking to innermost loops. */
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||||||
|
FOR_EACH_LOOP (li, loop, LI_ONLY_INNERMOST)
|
||||||
{
|
{
|
||||||
VEC (gimple, heap) *work_list = NULL;
|
VEC (gimple, heap) *work_list = NULL;
|
||||||
int num = loop->num;
|
int num = loop->num;
|
||||||
|
int nb_generated_loops = 0;
|
||||||
|
|
||||||
/* If the loop doesn't have a single exit we will fail anyway,
|
/* If the loop doesn't have a single exit we will fail anyway,
|
||||||
so do that early. */
|
so do that early. */
|
||||||
if (!single_exit (loop))
|
if (!single_exit (loop))
|
||||||
continue;
|
continue;
|
||||||
|
|
||||||
/* If both flag_tree_loop_distribute_patterns and
|
/* Only distribute loops with a header and latch for now. */
|
||||||
flag_tree_loop_distribution are set, then only
|
if (loop->num_nodes > 2)
|
||||||
distribute_patterns is executed. */
|
continue;
|
||||||
if (flag_tree_loop_distribute_patterns)
|
|
||||||
{
|
/* -ftree-loop-distribution strictly distributes more but also
|
||||||
/* With the following working list, we're asking
|
enables pattern detection. For now simply distribute all stores
|
||||||
distribute_loop to separate from the rest of the loop the
|
or memset like stores. */
|
||||||
stores of the form "A[i] = 0". */
|
if (flag_tree_loop_distribution)
|
||||||
|
stores_from_loop (loop, &work_list);
|
||||||
|
else if (flag_tree_loop_distribute_patterns)
|
||||||
stores_zero_from_loop (loop, &work_list);
|
stores_zero_from_loop (loop, &work_list);
|
||||||
|
|
||||||
/* Do nothing if there are no patterns to be distributed. */
|
|
||||||
if (VEC_length (gimple, work_list) > 0)
|
if (VEC_length (gimple, work_list) > 0)
|
||||||
nb_generated_loops = distribute_loop (loop, work_list);
|
nb_generated_loops = distribute_loop (loop, work_list);
|
||||||
}
|
|
||||||
else if (flag_tree_loop_distribution)
|
|
||||||
{
|
|
||||||
/* With the following working list, we're asking
|
|
||||||
distribute_loop to separate the stores of the loop: when
|
|
||||||
dependences allow, it will end on having one store per
|
|
||||||
loop. */
|
|
||||||
stores_from_loop (loop, &work_list);
|
|
||||||
|
|
||||||
/* A simple heuristic for cache locality is to not split
|
if (nb_generated_loops > 0)
|
||||||
stores to the same array. Without this call, an unrolled
|
changed = true;
|
||||||
loop would be split into as many loops as unroll factor,
|
|
||||||
each loop storing in the same array. */
|
|
||||||
remove_similar_memory_refs (&work_list);
|
|
||||||
|
|
||||||
nb_generated_loops = distribute_loop (loop, work_list);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (dump_file && (dump_flags & TDF_DETAILS))
|
if (dump_file && (dump_flags & TDF_DETAILS))
|
||||||
{
|
{
|
||||||
|
@ -1267,13 +1293,19 @@ tree_loop_distribution (void)
|
||||||
fprintf (dump_file, "Loop %d is the same.\n", num);
|
fprintf (dump_file, "Loop %d is the same.\n", num);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
VEC_free (gimple, heap, work_list);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (changed)
|
||||||
|
{
|
||||||
|
mark_sym_for_renaming (gimple_vop (cfun));
|
||||||
|
rewrite_into_loop_closed_ssa (NULL, TODO_update_ssa);
|
||||||
|
}
|
||||||
|
|
||||||
#ifdef ENABLE_CHECKING
|
#ifdef ENABLE_CHECKING
|
||||||
verify_loop_structure ();
|
verify_loop_structure ();
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
VEC_free (gimple, heap, work_list);
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue