re PR tree-optimization/36630 (ICE in vect_update_ivs_after_vectorizer)

	PR tree-optimization/36630
	* tree-vect-transform.c (vect_update_ivs_after_vectorizer):
	Call STRIP_NOPS before calling evolution_part_in_loop_num.


Co-Authored-By: Ira Rosen <irar@il.ibm.com>

From-SVN: r140085

gcc/ChangeLog

+2008-09-07  Richard Guenther  <rguenther@suse.de>
+            Ira Rosen  <irar@il.ibm.com>
+
+	PR tree-optimization/36630
+	* tree-vect-transform.c (vect_update_ivs_after_vectorizer):
+	Call STRIP_NOPS before calling evolution_part_in_loop_num.
+
 2008-09-07  Dorit Nuzman  <dorit@il.ibm.com>
             Ira Rosen  <irar@il.ibm.com>
 

gcc/testsuite/ChangeLog

+2008-09-07  Richard Guenther  <rguenther@suse.de>
+            Ira Rosen  <irar@il.ibm.com>
+
+	PR tree-optimization/36630
+	* gcc.dg/vect/pr36630.c: New test.
+
 2008-09-07  Daniel Kraft  <d@domob.eu>
 
 	* gfortran.dg/stfunc_6.f90: Extended testcase to include more tests

gcc/testsuite/gcc.dg/vect/pr36630.c

+/* { dg-do compile } */
+/* { dg-require-effective-target vect_int } */
+
+void
+foo (unsigned char *x, short y)
+{
+  short i;
+
+  i = 2;
+  while (i < y)
+    {
+      x[i - 1] = x[i];
+      i = i + 1;
+    }
+}
+/* { dg-final { cleanup-tree-dump "vect" } } */

gcc/tree-vect-transform.c

@@ -7332,6 +7332,7 @@ vect_update_ivs_after_vectorizer (loop_vec_info loop_vinfo, tree niters,
 
       access_fn = analyze_scalar_evolution (loop, PHI_RESULT (phi)); 
       gcc_assert (access_fn);
+      STRIP_NOPS (access_fn);
       evolution_part =
 	 unshare_expr (evolution_part_in_loop_num (access_fn, loop->num));
       gcc_assert (evolution_part != NULL_TREE);