From 17fa894c3056bfdf76af19e7ca1d685b9aa4a881 Mon Sep 17 00:00:00 2001 From: Changpeng Fang Date: Thu, 1 Jul 2010 11:27:21 -0700 Subject: [PATCH] Marking peeled loop * cfgloop.h : add peeled filed for loop structure. * tree-vect-loop-manip.c (vect_do_peeling_for_loop_bound): mark new_loop as peeled. * tree-ssa-loop-prefetch.c (loop_prefetch_arrays): Do not do loop prefetch for peeled loop. --- gcc/cfgloop.h | 2 ++ gcc/tree-ssa-loop-prefetch.c | 4 ++++ gcc/tree-vect-loop-manip.c | 1 + 3 files changed, 7 insertions(+), 0 deletions(-) diff --git a/gcc/cfgloop.h b/gcc/cfgloop.h index 3821ee6..f43d6df 100644 --- a/gcc/cfgloop.h +++ b/gcc/cfgloop.h @@ -166,6 +166,8 @@ struct GTY ((chain_next ("%h.next"))) loop { /* Head of the cyclic list of the exits of the loop. */ struct loop_exit *exits; + bool peeled; + /* The single induction variable of the loop when the loop is in normal form. */ tree single_iv; diff --git a/gcc/tree-ssa-loop-prefetch.c b/gcc/tree-ssa-loop-prefetch.c index cde5e18..8a219c3 100644 --- a/gcc/tree-ssa-loop-prefetch.c +++ b/gcc/tree-ssa-loop-prefetch.c @@ -1724,6 +1724,10 @@ loop_prefetch_arrays (struct loop *loop) return false; } + /* Don't do prefetching for peeled loop. */ + if (loop->peeled) + return false; + /* Step 1: gather the memory references. */ refs = gather_memory_references (loop, &no_other_refs, &mem_ref_count); diff --git a/gcc/tree-vect-loop-manip.c b/gcc/tree-vect-loop-manip.c index 8289b36..6bf54f5 100644 --- a/gcc/tree-vect-loop-manip.c +++ b/gcc/tree-vect-loop-manip.c @@ -1905,6 +1905,7 @@ vect_do_peeling_for_loop_bound (loop_vec_info loop_vinfo, tree *ratio, cond_expr, cond_expr_stmt_list); gcc_assert (new_loop); gcc_assert (loop_num == loop->num); + new_loop->peeled = true; #ifdef ENABLE_CHECKING slpeel_verify_cfg_after_peeling (loop, new_loop); #endif -- 1.6.3.3