re PR tree-optimization/52686 (SLP crashes with WIDEN_LSHIFT_EXPR)

	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.

From-SVN: r185795

gcc/ChangeLog

+2012-03-26  Ulrich Weigand  <ulrich.weigand@linaro.org>
+
+	PR tree-optimization/52686
+	* tree-vect-data-refs.c (vect_get_smallest_scalar_type): Handle
+	WIDEN_LSHIFT_EXPR.
+
 2012-03-26  Tristan Gingold  <gingold@adacore.com>
 
 	* config/alpha/vms.h (LINK_SPEC): Simplify.

gcc/testsuite/ChangeLog

+2012-03-26  Ulrich Weigand  <ulrich.weigand@linaro.org>
+
+	PR tree-optimization/52686
+	* gcc.target/arm/pr52686.c: New test.
+
 2012-03-26  Georg-Johann Lay  <avr@gjlay.de>
 
 	* gcc.target/avr/torture/avr-torture.exp (AVR_TORTURE_OPTIONS):

gcc/testsuite/gcc.target/arm/pr52686.c

+/* 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;
+    }
+}
+

gcc/tree-vect-data-refs.c

@@ -111,6 +111,7 @@ vect_get_smallest_scalar_type (gimple stmt, HOST_WIDE_INT *lhs_size_unit,
   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));