re PR bootstrap/42347 (sched-deps.c:3840:1: internal compiler error: in…

re PR bootstrap/42347 (sched-deps.c:3840:1: internal compiler error: in fixup_reorder_chain, at cfglayout.c:796)

	PR bootstrap/42347
	* cfglayout.c (fixup_reorder_chain): Allow returnjump_p
	to have no fallthru edge.

	* gcc.c-torture/compile/pr42347.c: New test.

From-SVN: r159496

gcc/ChangeLog

 2010-05-17  Jakub Jelinek  <jakub@redhat.com>
 
+	PR bootstrap/42347
+	* cfglayout.c (fixup_reorder_chain): Allow returnjump_p
+	to have no fallthru edge.
+
 	PR middle-end/44102
 	* cfgcleanup.c (try_optimize_cfg): When removing trivially empty
 	bb with no successors, move footer whenever in IR_RTL_CFGLAYOUT

gcc/cfglayout.c

@@ -793,7 +793,8 @@ fixup_reorder_chain (void)
 		 to prevent rtl_verify_flow_info from complaining.  */
 	      if (!e_fall)
 		{
-		  gcc_assert (!onlyjump_p (bb_end_insn));
+		  gcc_assert (!onlyjump_p (bb_end_insn)
+			      || returnjump_p (bb_end_insn));
 		  bb->il.rtl->footer = emit_barrier_after (bb_end_insn);
 		  continue;
 		}

gcc/testsuite/ChangeLog

 2010-05-17  Jakub Jelinek  <jakub@redhat.com>
 
+	PR bootstrap/42347
+	* gcc.c-torture/compile/pr42347.c: New test.
+
 	PR middle-end/44102
 	* g++.dg/ext/asmgoto1.C: New test.
 

gcc/testsuite/gcc.c-torture/compile/pr42347.c

+/* PR bootstrap/42347 */
+
+long
+foo (long x, long y)
+{
+  x = x & y;
+  switch (y)
+    {
+    case 63L: x >>= 0; break;
+    case 4032L: x >>= 6; break;
+    case 258048L: x >>= 12; break;
+    case 16515072L: x >>= 18; break;
+    default: __builtin_unreachable ();
+    }
+  return x;
+}