2012-03-26  Ulrich Weigand  <ulrich.weigand@linaro.org>

	LP 960283
	LP 960274
	LP 960817

	Backport from mainline:

	gcc/
	PR tree-optimization/52686
	* tree-vect-data-refs.c (vect_get_smallest_scalar_type): Handle
	WIDEN_LSHIFT_EXPR.

	gcc/testsuite/
	PR tree-optimization/52686
	* gcc.target/arm/pr52686.c: New test.

=== added file 'gcc/testsuite/gcc.target/arm/pr52686.c'
--- old/gcc/testsuite/gcc.target/arm/pr52686.c	1970-01-01 00:00:00 +0000
+++ new/gcc/testsuite/gcc.target/arm/pr52686.c	2012-03-23 16:26:22 +0000
@@ -0,0 +1,19 @@
+/* PR target/52375 */
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_neon_ok } */
+/* { dg-options "-march=armv7-a -mfloat-abi=softfp -mfpu=neon -O -ftree-vectorize" } */
+
+unsigned int output[4];
+
+void test (unsigned short *p)
+{
+  unsigned int x = *p;
+  if (x)
+    {
+      output[0] = x << 1;
+      output[1] = x << 1;
+      output[2] = x << 1;
+      output[3] = x << 1;
+    }
+}
+

=== modified file 'gcc/tree-vect-data-refs.c'
--- old/gcc/tree-vect-data-refs.c	2012-01-05 15:35:39 +0000
+++ new/gcc/tree-vect-data-refs.c	2012-03-23 16:26:22 +0000
@@ -111,6 +111,7 @@
   if (is_gimple_assign (stmt)
       && (gimple_assign_cast_p (stmt)
           || gimple_assign_rhs_code (stmt) == WIDEN_MULT_EXPR
+          || gimple_assign_rhs_code (stmt) == WIDEN_LSHIFT_EXPR
           || gimple_assign_rhs_code (stmt) == FLOAT_EXPR))
     {
       tree rhs_type = TREE_TYPE (gimple_assign_rhs1 (stmt));