2015-10-22 Richard Biener <rguenther@suse.de>

	PR tree-optimization/19049
	PR tree-optimization/65962
	* tree-vect-data-refs.c (vect_analyze_group_access_1): Fall back
	to strided accesses if single-element interleaving doesn't work.

	* gcc.dg/vect/vect-strided-store-pr65962.c: New testcase.
	* gcc.dg/vect/vect-63.c: Adjust.
	* gcc.dg/vect/vect-70.c: Likewise.
	* gcc.dg/vect/vect-strided-u8-i2-gap.c: Likewise.
	* gcc.dg/vect/vect-strided-a-u8-i2-gap.c: Likewise.
	* gfortran.dg/vect/pr19049.f90: Likewise.
	* gfortran.dg/vect/vect-8.f90: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@229172 138bc75d-0d04-0410-961f-82ee72b054a4

9 files changed, 32 insertions, 15 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 192360dc752..1e06d1a46ae 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,12 @@
 2015-10-22  Richard Biener  <rguenther@suse.de>
 
+	PR tree-optimization/19049
+	PR tree-optimization/65962
+	* tree-vect-data-refs.c (vect_analyze_group_access_1): Fall back
+	to strided accesses if single-element interleaving doesn't work.
+
+2015-10-22  Richard Biener  <rguenther@suse.de>
+
 	PR middle-end/68046
 	PR middle-end/61893
 	* optabs.c (emit_libcall_block_1): Allow a NULL_RTX equiv.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 45a287f3ec1..39260d6611c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,17 @@
 2015-10-22  Richard Biener  <rguenther@suse.de>
 
+	PR tree-optimization/19049
+	PR tree-optimization/65962
+	* gcc.dg/vect/vect-strided-store-pr65962.c: New testcase.
+	* gcc.dg/vect/vect-63.c: Adjust.
+	* gcc.dg/vect/vect-70.c: Likewise.
+	* gcc.dg/vect/vect-strided-u8-i2-gap.c: Likewise.
+	* gcc.dg/vect/vect-strided-a-u8-i2-gap.c: Likewise.
+	* gfortran.dg/vect/pr19049.f90: Likewise.
+	* gfortran.dg/vect/vect-8.f90: Likewise.
+
+2015-10-22  Richard Biener  <rguenther@suse.de>
+
 	PR middle-end/68046
 	PR middle-end/61893
 	* gcc.dg/torture/ftrapv-2.c: New testcase.
diff --git a/gcc/testsuite/gcc.dg/vect/vect-63.c b/gcc/testsuite/gcc.dg/vect/vect-63.c
index 1afbd74b1d4..8d002a5e3c3 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-63.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-63.c
@@ -13,7 +13,7 @@ int main1 ()
   int ia[N*2][4][N];
 
   /* Multidimensional array. Aligned. 
-     The first dimension depends on j: not vectorizable. */
+     The first dimension depends on j: use strided stores. */
   for (i = 0; i < N; i++)
     {
       for (j = 0; j < N; j++)
@@ -42,4 +42,4 @@ int main (void)
   return main1 ();
 }
 
-/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail *-*-* } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
diff --git a/gcc/testsuite/gcc.dg/vect/vect-70.c b/gcc/testsuite/gcc.dg/vect/vect-70.c
index a94140ecabc..0ec06a273df 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-70.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-70.c
@@ -37,7 +37,7 @@ int main1 ()
           abort ();
     }
   
-  /* not consecutive */
+  /* not consecutive, will use strided stores */
   for (i = 0; i < N; i++)
     for (j = 3; j < N-3; j++)
       { 
@@ -62,7 +62,7 @@ int main (void)
   return main1 ();
 }
           
-/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
+/* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" {target { vector_alignment_reachable} } } } */
 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 1 "vect" {target {{! vector_alignment_reachable} && {! vect_hw_misalign} } } } } */
diff --git a/gcc/testsuite/gcc.dg/vect/vect-strided-a-u8-i2-gap.c b/gcc/testsuite/gcc.dg/vect/vect-strided-a-u8-i2-gap.c
index bb983b19dda..52fdcf6ee7d 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-strided-a-u8-i2-gap.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-strided-a-u8-i2-gap.c
@@ -44,7 +44,7 @@ main1 ()
     }
 
   ptr = arr;
-  /* Not vectorizable: gap in store.  */ 
+  /* gap in store, use strided stores  */ 
   for (i = 0; i < N; i++)
     {
       res[i].a = ptr->b;
@@ -71,5 +71,5 @@ int main (void)
   return 0;
 }
 
-/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect"  { target vect_strided2 } } } */
   
diff --git a/gcc/testsuite/gcc.dg/vect/vect-strided-u8-i2-gap.c b/gcc/testsuite/gcc.dg/vect/vect-strided-u8-i2-gap.c
index fcbf2cc8c9f..8c541fe44a4 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-strided-u8-i2-gap.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-strided-u8-i2-gap.c
@@ -35,7 +35,7 @@ main1 (s *arr)
     }
 
   ptr = arr;
-  /* Not vectorizable: gap in store.  */ 
+  /* gap in store, use strided stores.  */ 
   for (i = 0; i < N; i++)
     {
       res[i].a = ptr->b;
@@ -73,5 +73,5 @@ int main (void)
   return 0;
 }
 
-/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect"  { target vect_strided2 } } } */
   
diff --git a/gcc/testsuite/gfortran.dg/vect/pr19049.f90 b/gcc/testsuite/gfortran.dg/vect/pr19049.f90
index 5f4b9b15c3d..5e4a8da36b0 100644
--- a/gcc/testsuite/gfortran.dg/vect/pr19049.f90
+++ b/gcc/testsuite/gfortran.dg/vect/pr19049.f90
@@ -18,7 +18,4 @@ subroutine s111 (ntimes,ld,n,ctime,dtime,a,b,c,d,e,aa,bb,cc)
       return
       end
 
-! { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" } }
-! { dg-final { scan-tree-dump-times "complicated access pattern" 1 "vect" { xfail vect_multiple_sizes } } }
-! { dg-final { scan-tree-dump-times "complicated access pattern" 2 "vect" { target vect_multiple_sizes } } }
-
+! { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } }
diff --git a/gcc/testsuite/gfortran.dg/vect/vect-8.f90 b/gcc/testsuite/gfortran.dg/vect/vect-8.f90
index 324ab78d160..1b85a6152a4 100644
--- a/gcc/testsuite/gfortran.dg/vect/vect-8.f90
+++ b/gcc/testsuite/gfortran.dg/vect/vect-8.f90
@@ -703,4 +703,4 @@ CALL track('KERNEL  ')
 RETURN
 END SUBROUTINE kernel
 
-! { dg-final { scan-tree-dump-times "vectorized 19 loops" 1 "vect" } }
+! { dg-final { scan-tree-dump-times "vectorized 20 loops" 1 "vect" } }
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
index 755b5a17e50..b3ca9d6e1b8 100644
--- a/gcc/tree-vect-data-refs.c
+++ b/gcc/tree-vect-data-refs.c
@@ -2114,7 +2114,6 @@ vect_analyze_group_access_1 (struct data_reference *dr)
  	  dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
 	                   "not consecutive access ");
 	  dump_gimple_stmt (MSG_MISSED_OPTIMIZATION, TDF_SLIM, stmt, 0);
-	  dump_printf (MSG_MISSED_OPTIMIZATION, "\n");
         }
 
       if (bb_vinfo)
@@ -2124,7 +2123,9 @@ vect_analyze_group_access_1 (struct data_reference *dr)
           return true;
         }
 
-      return false;
+      dump_printf_loc (MSG_NOTE, vect_location, "using strided accesses\n");
+      STMT_VINFO_STRIDED_P (stmt_info) = true;
+      return true;
     }
 
   if (GROUP_FIRST_ELEMENT (vinfo_for_stmt (stmt)) == stmt)