From: spop Date: Wed, 16 Jan 2008 02:44:04 +0000 (+0000) Subject: 2008-01-12 Sebastian Pop X-Git-Tag: upstream/4.9.2~44168 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d4fcfd16f48c3b7d11133cd9c9c70e43b63fd372;p=platform%2Fupstream%2Flinaro-gcc.git 2008-01-12 Sebastian Pop * tree-parloops.c (loop_has_blocks_with_irreducible_flag): New. (parallelize_loops): Don't parallelize irreducible components. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@131561 138bc75d-0d04-0410-961f-82ee72b054a4 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 676637f..b8c9e96 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2008-01-12 Sebastian Pop + + * tree-parloops.c (loop_has_blocks_with_irreducible_flag): New. + (parallelize_loops): Don't parallelize irreducible components. + 2008-01-14 Manuel Lopez-Ibanez PR c++/24924 diff --git a/gcc/tree-parloops.c b/gcc/tree-parloops.c index a6484b5..3b3176c 100644 --- a/gcc/tree-parloops.c +++ b/gcc/tree-parloops.c @@ -431,6 +431,26 @@ loop_parallel_p (struct loop *loop, htab_t reduction_list, struct tree_niter_des return ret; } +/* Return true when LOOP contains basic blocks marked with the + BB_IRREDUCIBLE_LOOP flag. */ + +static inline bool +loop_has_blocks_with_irreducible_flag (struct loop *loop) +{ + unsigned i; + basic_block *bbs = get_loop_body_in_dom_order (loop); + bool res = true; + + for (i = 0; i < loop->num_nodes; i++) + if (bbs[i]->flags & BB_IRREDUCIBLE_LOOP) + goto end; + + res = false; + end: + free (bbs); + return res; +} + /* Assigns the address of OBJ in TYPE to an ssa name, and returns this name. The assignment statement is placed before LOOP. DECL_ADDRESS maps decls to their addresses that can be reused. The address of OBJ is known to @@ -1741,6 +1761,7 @@ parallelize_loops (void) || expected_loop_iterations (loop) <= n_threads /* And of course, the loop must be parallelizable. */ || !can_duplicate_loop_p (loop) + || loop_has_blocks_with_irreducible_flag (loop) || !loop_parallel_p (loop, reduction_list, &niter_desc)) continue;