diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index badfe80ae71..467a8a23afc 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2009-12-14  Jakub Jelinek  <jakub@redhat.com>
 
+	PR bootstrap/42369
+	* config/i386/i386.c (ix86_expand_special_args_builtin): Avoid
+	using switch with CODE_FOR_lwp_lwp* cases.
+
 	* config/i386/i386-builtin-types.def (PVOID_FTYPE_VOID): Use
 	DEF_FUNCTION_TYPE (PVOID) instead of DEF_FUNCTION_TYPE (PVOID, VOID).
 
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 9b739a6c95b..281bd416a51 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -23836,19 +23836,16 @@ ix86_expand_special_args_builtin (const struct builtin_description *d,
       if (last_arg_constant && (i + 1) == nargs)
 	{
 	  if (!match)
-	    switch (icode)
-	      {
-	      case CODE_FOR_lwp_lwpvalsi3:
-	      case CODE_FOR_lwp_lwpvaldi3:
-	      case CODE_FOR_lwp_lwpinssi3:
-	      case CODE_FOR_lwp_lwpinsdi3:
+	    {
+	      if (icode == CODE_FOR_lwp_lwpvalsi3
+		  || icode == CODE_FOR_lwp_lwpinssi3
+		  || icode == CODE_FOR_lwp_lwpvaldi3
+		  || icode == CODE_FOR_lwp_lwpinsdi3)
 		error ("the last argument must be a 32-bit immediate");
-		return const0_rtx;
-
-	      default:
+	      else
 		error ("the last argument must be an 8-bit immediate");
-		return const0_rtx;
-	      }
+	      return const0_rtx;
+	    }
 	}
       else
 	{