arm.c (arm_vector_alignment_reachable): Check unaligned_access.

2014-02-06  Yury Gribov  <y.gribov@samsung.com>
	    Kugan Vivekanandarajah  <kuganv@linaro.org>

gcc/
	* config/arm/arm.c (arm_vector_alignment_reachable): Check
	unaligned_access.
	* config/arm/arm.c (arm_builtin_support_vector_misalignment): Likewise.

testsuite/
	* gcc.target/arm/vect-noalign.c: New file.

Co-Authored-By: Kugan Vivekanandarajah <kuganv@linaro.org>

From-SVN: r207533

gcc/ChangeLog

+2014-02-06  Yury Gribov  <y.gribov@samsung.com>
+	    Kugan Vivekanandarajah  <kuganv@linaro.org>
+
+	* config/arm/arm.c (arm_vector_alignment_reachable): Check
+	unaligned_access.
+	* config/arm/arm.c (arm_builtin_support_vector_misalignment): Likewise.
+
 2014-02-06  Richard Biener  <rguenther@suse.de>
 
 	* tree-cfg.c (gimple_duplicate_sese_region): Fix ordering of

gcc/config/arm/arm.c

@@ -29551,7 +29551,7 @@ arm_vector_alignment_reachable (const_tree type, bool is_packed)
 {
   /* Vectors which aren't in packed structures will not be less aligned than
      the natural alignment of their element type, so this is safe.  */
-  if (TARGET_NEON && !BYTES_BIG_ENDIAN)
+  if (TARGET_NEON && !BYTES_BIG_ENDIAN && unaligned_access)
     return !is_packed;
 
   return default_builtin_vector_alignment_reachable (type, is_packed);
@@ -29562,7 +29562,7 @@ arm_builtin_support_vector_misalignment (enum machine_mode mode,
 					 const_tree type, int misalignment,
 					 bool is_packed)
 {
-  if (TARGET_NEON && !BYTES_BIG_ENDIAN)
+  if (TARGET_NEON && !BYTES_BIG_ENDIAN && unaligned_access)
     {
       HOST_WIDE_INT align = TYPE_ALIGN_UNIT (type);
 

gcc/testsuite/ChangeLog

+2014-02-06  Yury Gribov  <y.gribov@samsung.com>
+	    Kugan Vivekanandarajah  <kuganv@linaro.org>
+
+	* gcc.target/arm/vect-noalign.c: New file.
+
 2014-02-05  Jan Hubicka  <hubicka@ucw.cz>
 	    Jakub Jelinek  <jakub@redhat.com>
 

gcc/testsuite/gcc.target/arm/vect-noalign.c

+/* { dg-do run } */
+/* { dg-require-effective-target arm_neon_hw } */
+/* { dg-options "-mfpu=neon -ffast-math -ftree-vectorize -fno-common -O2 -mno-unaligned-access" } */
+
+
+/* Test for-mno-unaligned-access and -ftree-vectorize  and results bus error. */
+#define N 128
+
+char ia[N];
+char ib[N+1];
+
+int main() {
+  int i;
+  for(i = 0; i < N; ++i) {
+    ia[i] = ib[i + 1];
+  }
+
+  return 0;
+}
+