re PR tree-optimization/33373 (ICE in vectorizable_type_demotion, at tree-vect-transform.c:4098)

        PR tree-optimization/33373
        * tree-vect-analyze (vect_determine_vectorization_factor): Call
        TREE_INT_CST_LOW when comparing TYPE_SIZE_UNIT.

From-SVN: r128415

gcc/ChangeLog

+2007-09-12  Dorit Nuzman  <dorit@il.ibm.com>
+
+	PR tree-optimization/33373
+	* tree-vect-analyze (vect_determine_vectorization_factor): Call 
+	TREE_INT_CST_LOW when comparing TYPE_SIZE_UNIT.	
+
 2007-09-12  Jan Hubicka  <jh@suse.cz>
 
 	PR target/33393

gcc/testsuite/ChangeLog

+2007-09-12  Dorit Nuzman  <dorit@il.ibm.com>
+
+	PR tree-optimization/33373
+	* gcc.dg/vect/pr33373.c: New test.
+
 2007-09-12  Ben Elliston  <bje@au.ibm.com>
 
 	* lib/target-supports.exp (check_effective_target_vect_no_double):

gcc/testsuite/gcc.dg/vect/pr33373.c

+/* { dg-do compile } */
+void DOSMEM_FillIsrTable(int*isr) {
+    int i;
+
+    for (i=0; i<256; i++)
+        isr[i]=(((short)((i*4) & 0xFFFF)) | (0xf000 & 0xFFFF) << 16);
+}
+/* { dg-final { cleanup-tree-dump "vect" } } */

gcc/tree-vect-analyze.c

@@ -242,11 +242,12 @@ vect_determine_vectorization_factor (loop_vec_info loop_vinfo)
 	      operation = GIMPLE_STMT_OPERAND (stmt, 1);
 	      if (TREE_CODE (operation) == NOP_EXPR
 		  || TREE_CODE (operation) == CONVERT_EXPR
-		  || TREE_CODE (operation) ==  WIDEN_MULT_EXPR)
+		  || TREE_CODE (operation) == WIDEN_MULT_EXPR)
 		{
 		  tree rhs_type = TREE_TYPE (TREE_OPERAND (operation, 0));
-		  if (TYPE_SIZE_UNIT (rhs_type) < TYPE_SIZE_UNIT (scalar_type))
-		    scalar_type = TREE_TYPE (TREE_OPERAND (operation, 0));
+		  if (TREE_INT_CST_LOW (TYPE_SIZE_UNIT (rhs_type)) < 
+		      TREE_INT_CST_LOW (TYPE_SIZE_UNIT (scalar_type)))
+		    scalar_type = rhs_type;
 		}
 
 	      if (vect_print_dump_info (REPORT_DETAILS))