target.def (vector_alignment): New target hook.

ChangeLog:

	* target.def (vector_alignment): New target hook.
	* doc/tm.texi.in (TARGET_VECTOR_ALIGNMENT): Document new hook.
	* doc/tm.texi: Regenerate.
	* targhooks.c (default_vector_alignment): New function.
	* targhooks.h (default_vector_alignment): Add prototype.
	* stor-layout.c (layout_type): Use targetm.vector_alignment.
	* config/arm/arm.c (arm_vector_alignment): New function.
	(TARGET_VECTOR_ALIGNMENT): Define.

	* tree-vect-data-refs.c (vect_update_misalignment_for_peel): Use
	vector type alignment instead of size.
	* tree-vect-loop-manip.c (vect_do_peeling_for_loop_bound): Use
	element type size directly instead of computing it from alignment.
	Fix variable naming and comment.

testsuite/ChangeLog:

	* lib/target-supports.exp
	(check_effective_target_vect_natural_alignment): New function.
	* gcc.dg/align-2.c: Only run on targets with natural alignment
	of vector types.
	* gcc.dg/vect/slp-25.c: Adjust tests for targets without natural
	alignment of vector types.

Co-Authored-By: Richard Earnshaw <rearnsha@arm.com>

From-SVN: r189974

4 files changed, 31 insertions, 2 deletions

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index f593cf0..442aa3f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2012-07-30  Ulrich Weigand  <ulrich.weigand@linaro.org>
+
+	* lib/target-supports.exp
+	(check_effective_target_vect_natural_alignment): New function.
+	* gcc.dg/align-2.c: Only run on targets with natural alignment
+	of vector types.
+	* gcc.dg/vect/slp-25.c: Adjust tests for targets without natural
+	alignment of vector types.
+
 2012-07-30  Kirill Yukhin  <kirill.yukhin@intel.com>
 	    Michael Zolotukhin  <michael.v.zolotukhin@intel.com>
 
diff --git a/gcc/testsuite/gcc.dg/align-2.c b/gcc/testsuite/gcc.dg/align-2.c
index f5c00fd..2001a15 100644
--- a/gcc/testsuite/gcc.dg/align-2.c
+++ b/gcc/testsuite/gcc.dg/align-2.c
@@ -1,5 +1,5 @@
 /* PR 17962 */
-/* { dg-do compile } */
+/* { dg-do compile { target vect_natural_alignment } } */
 /* { dg-options "" } */
 
 typedef float v4 __attribute__((vector_size(sizeof(float)*4)));
diff --git a/gcc/testsuite/gcc.dg/vect/slp-25.c b/gcc/testsuite/gcc.dg/vect/slp-25.c
index 0dec2f1..e5e5e3b 100644
--- a/gcc/testsuite/gcc.dg/vect/slp-25.c
+++ b/gcc/testsuite/gcc.dg/vect/slp-25.c
@@ -56,5 +56,5 @@ int main (void)
 
 /* { 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" 2 "vect" { xfail { vect_no_align } } } } */
+/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 2 "vect" { xfail { vect_no_align || { ! vect_natural_alignment } } } } } */
 /* { dg-final { cleanup-tree-dump "vect" } } */
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 6640ef2..0dc5815 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -3387,6 +3387,26 @@ proc check_effective_target_natural_alignment_64 { } {
     return $et_natural_alignment_64_saved
 }
 
+# Return 1 if all vector types are naturally aligned (aligned to their
+# type-size), 0 otherwise.
+#
+# This won't change for different subtargets so cache the result.
+
+proc check_effective_target_vect_natural_alignment { } {
+    global et_vect_natural_alignment
+
+    if [info exists et_vect_natural_alignment_saved] {
+        verbose "check_effective_target_vect_natural_alignment: using cached result" 2
+    } else {
+        set et_vect_natural_alignment_saved 1
+        if { [check_effective_target_arm_eabi] } {
+            set et_vect_natural_alignment_saved 0
+        }
+    }
+    verbose "check_effective_target_vect_natural_alignment: returning $et_vect_natural_alignment_saved" 2
+    return $et_vect_natural_alignment_saved
+}
+
 # Return 1 if vector alignment (for types of size 32 bit or less) is reachable, 0 otherwise.
 #
 # This won't change for different subtargets so cache the result.