re PR tree-optimization/92347 (ICE in vect_get_vec_def_for_operand_1, at tree-vect-stmts.c:1537)

2019-11-11  Andre Vieira  <andre.simoesdiasvieira@arm.com>

        PR tree-optimization/92347
        * tree-vect-loop.c (vect_transform_loop): Don't overwrite epilogues
        safelen with 0.

        * gcc.dg/vect/pr92347.c: New test.

From-SVN: r278079

gcc/ChangeLog

+2019-11-12  Andre Vieira  <andre.simoesdiasvieira@arm.com>
+
+	* tree-vect-loop.c (vect_transform_loop): Don't overwrite epilogues
+	safelen with 0.
+
 2019-11-12  Alan Modra  <amodra@gmail.com>
 
 	* config/rs6000/predicates.md (unspec_tls): Allow const0_rtx for got

gcc/testsuite/ChangeLog

+2019-11-12  Andre Vieira  <andre.simoesdiasvieira@arm.com>
+
+	* gcc.dg/vect/pr92347.c: New test.
+
 2019-11-11  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/92447

gcc/testsuite/gcc.dg/vect/pr92347.c

+/* Copied from PR 92347.  */
+/* { dg-do compile } */
+/* { dg-options "-O1 -fopenmp-simd" } */
+/* { dg-additional-options "-mavx" { target { i?86-*-* x86_64-*-* } } } */
+
+int by;
+
+#pragma omp declare simd
+int
+zp (int);
+
+void
+qh (int oh)
+{
+#pragma omp simd
+  for (by = 0; by < oh; ++by)
+    by = zp (by);
+}

gcc/tree-vect-loop.c

@@ -8587,7 +8587,6 @@ vect_transform_loop (loop_vec_info loop_vinfo)
 
       epilogue->simduid = loop->simduid;
       epilogue->force_vectorize = loop->force_vectorize;
-      epilogue->safelen = loop->safelen;
       epilogue->dont_vectorize = false;
     }