Fix assert in gimple_phi_set_arg

2017-07-19  Tom de Vries  <tom@codesourcery.com>

	* gimple.h (gimple_phi_set_arg): Make assert more strict.

From-SVN: r250352

gcc/ChangeLog

 2017-07-19  Tom de Vries  <tom@codesourcery.com>
 
+	* gimple.h (gimple_phi_set_arg): Make assert more strict.
+
+2017-07-19  Tom de Vries  <tom@codesourcery.com>
+
 	* gimple.h (gimple_phi_arg): Make assert more strict.
 
 2017-07-19  Steven Munroe  <munroesj@gcc.gnu.org>

gcc/gimple.h

@@ -4351,7 +4351,7 @@ gimple_phi_arg (gimple *gs, unsigned index)
 static inline void
 gimple_phi_set_arg (gphi *phi, unsigned index, struct phi_arg_d * phiarg)
 {
-  gcc_gimple_checking_assert (index <= phi->nargs);
+  gcc_gimple_checking_assert (index < phi->nargs);
   phi->args[index] = *phiarg;
 }