tree-optimization/116905 - ICE with bogus range ops

The following avoids querying ranges of vector entities.

	PR tree-optimization/116905
	* tree-vect-stmts.cc (supportable_indirect_convert_operation):
	Fix guard for vect_get_range_info.

	* gcc.dg/pr116905.c: New testcase.

gcc/testsuite/gcc.dg/pr116905.c

@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target float16 } */
+/* { dg-options "-frounding-math" } */
+/* { dg-additional-options "-mavx" { target avx } } */
+
+typedef __attribute__((__vector_size__(16))) _Float16 F;
+typedef __attribute__((__vector_size__(32))) int V;
+F f;
+
+void
+foo()
+{
+  f += __builtin_convertvector((V){3307}, F);
+}

gcc/tree-vect-stmts.cc

@@ -14803,8 +14803,10 @@ supportable_indirect_convert_operation (code_helper code,
 		 In the future, if it is supported, changes may need to be made
 		 to this part, such as checking the RANGE of each element
 		 in the vector.  */
-	      if ((TREE_CODE (op0) == SSA_NAME && !SSA_NAME_RANGE_INFO (op0))
-		  || !vect_get_range_info (op0, &op_min_value, &op_max_value))
+	      if (TREE_CODE (op0) != SSA_NAME
+		  || !SSA_NAME_RANGE_INFO (op0)
+		  || !vect_get_range_info (op0, &op_min_value,
+					   &op_max_value))
 		break;
 
 	      if (cvt_type == NULL_TREE