re PR middle-end/70219 (ICE: in delete_move_and_clobber, at lra-constraints.c:5864 with -O2)

	PR middle-end/70219
	* lra-constraints.c (delete_move_and_clobber): Change assertion
	to also allow dregno == 0.

	* gcc.dg/pr70219.c: New test.

From-SVN: r234201

gcc/ChangeLog

+2016-03-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/70219
+	* lra-constraints.c (delete_move_and_clobber): Change assertion
+	to also allow dregno == 0.
+
 2016-03-14  Richard Henderson  <rth@redhat.com>
 
 	PR tree-opt/68714

gcc/lra-constraints.c

@@ -5868,7 +5868,7 @@ delete_move_and_clobber (rtx_insn *insn, int dregno)
   rtx_insn *prev_insn = PREV_INSN (insn);
 
   lra_set_insn_deleted (insn);
-  lra_assert (dregno > 0);
+  lra_assert (dregno >= 0);
   if (prev_insn != NULL && NONDEBUG_INSN_P (prev_insn)
       && GET_CODE (PATTERN (prev_insn)) == CLOBBER
       && dregno == get_regno (XEXP (PATTERN (prev_insn), 0)))

gcc/testsuite/ChangeLog

+2016-03-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/70219
+	* gcc.dg/pr70219.c: New test.
+
 2016-03-14  Bernd Schmidt  <bschmidt@redhat.com>
 
 	PR target/70083

gcc/testsuite/gcc.dg/pr70219.c

+/* PR middle-end/70219 */
+/* { dg-do compile { target int128 } } */
+/* { dg-options "-O1 -w -Wno-psabi" } */
+
+typedef int B __attribute__ ((vector_size (32)));
+typedef int D __attribute__ ((vector_size (32)));
+typedef long E __attribute__ ((vector_size (32)));
+typedef __int128 F;
+typedef __int128 G __attribute__ ((vector_size (32)));
+
+F
+foo (int a, unsigned b, F c, B d, G e, B f, D g, E h, G i)
+{
+  b /= c;
+  e /= (G) ~d;
+  h -= (E){ g[4], e[1], 64, ~f[1] };
+  return b + e[1] + h[0] + h[1] + i[1];
+}