re PR target/41993 ([sh] ICE in create_pre_exit, at mode-switching.c:399)

	PR target/41993
	* mode-switching.c (create_pre_exit): Set return_copy to last_insn
	when copy_start is a function return regno instead of pseudo.
	Skip debug instructions in instruction scan loop.

From-SVN: r193480

gcc/ChangeLog

+2012-11-13  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/41993
+	* mode-switching.c (create_pre_exit): Set return_copy to last_insn
+	when copy_start is a function return regno instead of pseudo.
+	Skip debug instructions in instruction scan loop.
+
 2012-11-13  Andrew Stubbs  <ams@codesourcery.com>
 	    Ulrich Weigand  <ulrich.weigand@linaro.org>
 

gcc/mode-switching.c

@@ -242,7 +242,8 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
 		int copy_start, copy_num;
 		int j;
 
-		if (INSN_P (return_copy))
+		if (INSN_P (return_copy)
+		    && !DEBUG_INSN_P (return_copy))
 		  {
 		    /* When using SJLJ exceptions, the call to the
 		       unregister function is inserted between the
@@ -330,7 +331,7 @@ create_pre_exit (int n_entities, int *entity_map, const int *num_modes)
 			  short_block = 1;
 			break;
 		      }
-		    if (copy_start >= FIRST_PSEUDO_REGISTER)
+		    if (!targetm.calls.function_value_regno_p (copy_start))
 		      {
 			last_insn = return_copy;
 			continue;