2011-05-02  Ira Rosen  <ira.rosen@linaro.org>

	Backport from FSF:

	2011-03-27  Ira Rosen  <ira.rosen@linaro.org>

	gcc/
	* config/arm/arm.c (arm_autovectorize_vector_sizes): New function.
	(TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES): Define.

	gcc/testsuite/
	* gcc.dg/vect/vect-outer-5.c: Reduce the distance between data
	accesses to preserve the meaning of the test for doubleword vectors.
	* gcc.dg/vect/no-vfa-pr29145.c: Likewise.
	* gcc.dg/vect/slp-3.c: Reduce the loop bound for the same reason.

=== modified file 'gcc/config/arm/arm.c'
--- old/gcc/config/arm/arm.c	2011-03-02 11:38:43 +0000
+++ new/gcc/config/arm/arm.c	2011-04-28 11:46:58 +0000
@@ -250,6 +250,7 @@
 						     bool is_packed);
 static void arm_conditional_register_usage (void);
 static reg_class_t arm_preferred_rename_class (reg_class_t rclass);
+static unsigned int arm_autovectorize_vector_sizes (void);
 
 
 /* Table of machine attributes.  */
@@ -395,6 +396,9 @@
 #define TARGET_VECTOR_MODE_SUPPORTED_P arm_vector_mode_supported_p
 #undef TARGET_VECTORIZE_PREFERRED_SIMD_MODE
 #define TARGET_VECTORIZE_PREFERRED_SIMD_MODE arm_preferred_simd_mode
+#undef TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES
+#define TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES \
+  arm_autovectorize_vector_sizes
 
 #undef  TARGET_MACHINE_DEPENDENT_REORG
 #define TARGET_MACHINE_DEPENDENT_REORG arm_reorg
@@ -23511,6 +23515,12 @@
     }
 }
 
+static unsigned int
+arm_autovectorize_vector_sizes (void)
+{
+  return TARGET_NEON_VECTORIZE_QUAD ? 16 | 8 : 0;
+}
+
 static bool
 arm_vector_alignment_reachable (const_tree type, bool is_packed)
 {

=== modified file 'gcc/testsuite/gcc.dg/vect/no-vfa-pr29145.c'
--- old/gcc/testsuite/gcc.dg/vect/no-vfa-pr29145.c	2010-10-04 14:59:30 +0000
+++ new/gcc/testsuite/gcc.dg/vect/no-vfa-pr29145.c	2011-04-28 11:46:58 +0000
@@ -8,7 +8,7 @@
 void with_restrict(int * __restrict p)
 {
   int i;
-  int *q = p - 2;
+  int *q = p - 1;
 
   for (i = 0; i < 1000; ++i) {
     p[i] = q[i];
@@ -19,7 +19,7 @@
 void without_restrict(int * p)
 {
   int i;
-  int *q = p - 2;
+  int *q = p - 1;
 
   for (i = 0; i < 1000; ++i) {
     p[i] = q[i];
@@ -38,8 +38,8 @@
     a[i] = b[i] = i;
   }
 
-  with_restrict(a + 2);
-  without_restrict(b + 2);
+  with_restrict(a + 1);
+  without_restrict(b + 1);
 
   for (i = 0; i < 1002; ++i) {
     if (a[i] != b[i])

=== modified file 'gcc/testsuite/gcc.dg/vect/slp-3.c'
--- old/gcc/testsuite/gcc.dg/vect/slp-3.c	2010-11-22 12:16:52 +0000
+++ new/gcc/testsuite/gcc.dg/vect/slp-3.c	2011-04-28 11:46:58 +0000
@@ -4,9 +4,9 @@
 #include <stdarg.h>
 #include "tree-vect.h"
 
-#define N 8 
+#define N 12 
 
-unsigned short in[N*8] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63};
+unsigned short in[N*8] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};
 
 int
 main1 ()
@@ -101,7 +101,7 @@
     }
 
   /* SLP with unrolling by 8.  */
-  for (i = 0; i < N/2; i++)
+  for (i = 0; i < N/4; i++)
     {
       out[i*9] = in[i*9];
       out[i*9 + 1] = in[i*9 + 1];
@@ -115,7 +115,7 @@
     }
 
   /* check results:  */
-  for (i = 0; i < N/2; i++)
+  for (i = 0; i < N/4; i++)
     {
       if (out[i*9] !=  in[i*9]
          || out[i*9 + 1] != in[i*9 + 1]

=== modified file 'gcc/testsuite/gcc.dg/vect/vect-outer-5.c'
--- old/gcc/testsuite/gcc.dg/vect/vect-outer-5.c	2010-11-22 12:16:52 +0000
+++ new/gcc/testsuite/gcc.dg/vect/vect-outer-5.c	2011-04-28 11:46:58 +0000
@@ -17,7 +17,7 @@
   float B[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   float C[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   float D[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
-  float E[4] = {0,1,2,480};
+  float E[4] = {0,480,960,1440};
   float s;
 
   int i, j;
@@ -55,7 +55,7 @@
       s = 0;
       for (j=0; j<N; j+=4)
 	s += C[j];
-      B[i+3] = B[i] + s;
+      B[i+1] = B[i] + s;
     }
 
   /* check results:  */