re PR target/92022 (ICE in alpha_handle_trap_shadows, at config/alpha/alpha.c:8847)

	PR target/92022
	* config/alpha/alpha.c (alpha_handle_trap_shadows): Skip DEBUG_INSN.

testsuite/ChangeLog:

	PR target/92022
	* g++.dg/pr92022.C: New test.

From-SVN: r276839

gcc/ChangeLog

+2019-10-10  Uroš Bizjak  <ubizjak@gmail.com>
+
+	PR target/92022
+	* config/alpha/alpha.c (alpha_handle_trap_shadows): Skip DEBUG_INSN.
+
 2019-10-10  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	PR target/88630

gcc/config/alpha/alpha.c

@@ -8708,6 +8708,9 @@ alpha_handle_trap_shadows (void)
 		    case CODE_LABEL:
 		      goto close_shadow;
 
+		    case DEBUG_INSN:
+		      break;
+
 		    default:
 		      gcc_unreachable ();
 		    }

gcc/testsuite/ChangeLog

+2019-10-10  Uroš Bizjak  <ubizjak@gmail.com>
+
+	PR target/92022
+	* g++.dg/pr92022.C: New test.
+
 2019-10-10  Jakub Jelinek  <jakub@redhat.com>
 
 	* c-c++-common/gomp/declare-variant-1.c: New test.

gcc/testsuite/g++.dg/pr92022.C

+// { dg-do compile { target alpha*-*-* } }
+// { dg-options "-O1 -g -fno-var-tracking -mcpu=ev4 -mieee" }
+
+struct a {
+  a(long);
+};
+long b;
+void c() {
+  a d(1);
+  double e = b;
+  for (; b;)
+    d = e;
+}