re PR middle-end/71734 (FAIL: libgomp.fortran/simd4.f90 -O3 -g execution test)

gcc/

2016-07-18  Yuri Rumyantsev  <ysrumyan@gmail.com>

	PR tree-optimization/71734
	* tree-ssa-loop-im.c (ref_indep_loop_p_1): Add REF_LOOP argument which
	contains REF, use it to check safelen, assume that safelen value
	must be greater 1, fix style.
	(ref_indep_loop_p_2): Add REF_LOOP argument.
	(ref_indep_loop_p): Pass LOOP as additional argument to
	ref_indep_loop_p_2.

gcc/testsuite/

2016-07-18  Yuri Rumyantsev  <ysrumyan@gmail.com>

	PR tree-optimization/71734
	* g++.dg/vect/pr70729.cc: Delete redundant dg options, fix style.

From-SVN: r238435

1 files changed, 17 insertions, 13 deletions

diff --git a/gcc/tree-ssa-loop-im.c b/gcc/tree-ssa-loop-im.c
index ee04826..278f60a 100644
--- a/gcc/tree-ssa-loop-im.c
+++ b/gcc/tree-ssa-loop-im.c
@@ -2109,11 +2109,12 @@ record_dep_loop (struct loop *loop, im_mem_ref *ref, bool stored_p)
     loop = loop_outer (loop);
 }
 
-/* Returns true if REF is independent on all other memory references in
-   LOOP.  */
+/* Returns true if REF in REF_LOOP is independent on all other memory
+   references in LOOP.  */
 
 static bool
-ref_indep_loop_p_1 (struct loop *loop, im_mem_ref *ref, bool stored_p)
+ref_indep_loop_p_1 (struct loop *ref_loop, struct loop *loop,
+		    im_mem_ref *ref, bool stored_p)
 {
   bitmap refs_to_check;
   unsigned i;
@@ -2128,13 +2129,14 @@ ref_indep_loop_p_1 (struct loop *loop, im_mem_ref *ref, bool stored_p)
   if (bitmap_bit_p (refs_to_check, UNANALYZABLE_MEM_ID))
     return false;
 
-  if (loop->safelen > 0)
+  if (ref_loop->safelen > 1)
     {
       if (dump_file && (dump_flags & TDF_DETAILS))
 	{
-	  fprintf(dump_file,"Consider REF independent in loop#%d\n", loop->num);
-	  print_generic_expr(dump_file, ref->mem.ref, TDF_SLIM);
-	  fprintf(dump_file, "\n");
+	  fprintf (dump_file,"REF is independent in ref_loop#%d\n",
+		   ref_loop->num);
+	  print_generic_expr (dump_file, ref->mem.ref, TDF_SLIM);
+	  fprintf (dump_file, "\n");
 	}
       return true;
     }
@@ -2149,11 +2151,13 @@ ref_indep_loop_p_1 (struct loop *loop, im_mem_ref *ref, bool stored_p)
   return true;
 }
 
-/* Returns true if REF is independent on all other memory references in
-   LOOP.  Wrapper over ref_indep_loop_p_1, caching its results.  */
+/* Returns true if REF in REF_LOOP is independent on all other memory
+   references in LOOP.  Wrapper over ref_indep_loop_p_1, caching its
+   results.  */
 
 static bool
-ref_indep_loop_p_2 (struct loop *loop, im_mem_ref *ref, bool stored_p)
+ref_indep_loop_p_2 (struct loop *ref_loop, struct loop *loop,
+		    im_mem_ref *ref, bool stored_p)
 {
   stored_p |= (ref->stored && bitmap_bit_p (ref->stored, loop->num));
 
@@ -2165,12 +2169,12 @@ ref_indep_loop_p_2 (struct loop *loop, im_mem_ref *ref, bool stored_p)
   struct loop *inner = loop->inner;
   while (inner)
     {
-      if (!ref_indep_loop_p_2 (inner, ref, stored_p))
+      if (!ref_indep_loop_p_2 (ref_loop, inner, ref, stored_p))
 	return false;
       inner = inner->next;
     }
 
-  bool indep_p = ref_indep_loop_p_1 (loop, ref, stored_p);
+  bool indep_p = ref_indep_loop_p_1 (ref_loop, loop, ref, stored_p);
 
   if (dump_file && (dump_flags & TDF_DETAILS))
     fprintf (dump_file, "Querying dependencies of ref %u in loop %d: %s\n",
@@ -2209,7 +2213,7 @@ ref_indep_loop_p (struct loop *loop, im_mem_ref *ref)
 {
   gcc_checking_assert (MEM_ANALYZABLE (ref));
 
-  return ref_indep_loop_p_2 (loop, ref, false);
+  return ref_indep_loop_p_2 (loop, loop, ref, false);
 }
 
 /* Returns true if we can perform store motion of REF from LOOP.  */