re PR rtl-optimization/70596 (-fcompare-debug failure with one extra NOTE_INSN_DELETED)

	PR rtl-optimization/70596
	* lra-spills.c (spill_pseudos): Don't delete debug insns, instead
	just invalidate LRA data and reset them.  Adjust dump wording.

	* gcc.target/i386/pr70596.c: New test.

From-SVN: r234906

gcc/ChangeLog

+2016-04-12  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/70596
+	* lra-spills.c (spill_pseudos): Don't delete debug insns, instead
+	just invalidate LRA data and reset them.  Adjust dump wording.
+
 2016-04-12  Martin Liska  <mliska@suse.cz>
 
 	Revert

gcc/lra-spills.c

@@ -528,11 +528,12 @@ spill_pseudos (void)
 	  if (removed_pseudo_p)
 	    {
 	      lra_assert (DEBUG_INSN_P (insn));
-	      lra_set_insn_deleted (insn);
+	      lra_invalidate_insn_data (insn);
+	      INSN_VAR_LOCATION_LOC (insn) = gen_rtx_UNKNOWN_VAR_LOC ();
 	      if (lra_dump_file != NULL)
 		fprintf (lra_dump_file,
-			 "Debug insn #%u is deleted as containing removed pseudo\n",
-			 INSN_UID (insn));
+			 "Debug insn #%u is reset because it referenced "
+			 "removed pseudo\n", INSN_UID (insn));
 	    }
 	  bitmap_and_compl_into (df_get_live_in (bb), &spilled_pseudos);
 	  bitmap_and_compl_into (df_get_live_out (bb), &spilled_pseudos);

gcc/testsuite/ChangeLog

+2016-04-12  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/70596
+	* gcc.target/i386/pr70596.c: New test.
+
 2016-04-12  Nathan Sidwell  <nathan@acm.org>
 
 	PR c++/70501

gcc/testsuite/gcc.target/i386/pr70596.c

+/* PR rtl-optimization/70596 */
+/* { dg-do compile { target avx512f } } */
+/* { dg-options "-O2 -fno-dce -fschedule-insns -fno-tree-coalesce-vars -fno-tree-dce -fno-tree-fre -fno-tree-pre -fcompare-debug -mavx512f" } */
+
+typedef char V __attribute__((vector_size (64)));
+
+int
+foo (V u, V v)
+{
+  v /= u | 1;
+  v[18] = 1 | v[8];
+  return v[1] + v[6] + v[0] + v[1] + v[18] +  v[2] + v[7];
+}