[PATCH, PR 61340] Add default label to two switches on enum ipa_ref_use

[Martin Jambor]

Hi,

in PR 61340 it has been reported that clang warns about unhandeld enum
values in a switch (gcc does not, I guess I'll open a new PR for
that).

Fixed thusly by adding a default label with a gcc_unreachable() in
both.  The potentially unhandled enum value in both cases is
IPA_REF_ALIAS which we cannot encounter because

1) in ipa-pure-const.c we are not processing aliases and

2) in ipa-reference.c we analyze references of a function to a
   variable and that cannot be an alias.

OK for trunk?

Thanks,

Martin


2014-06-03  Martin Jambor  <mjam...@suse.cz>

        PR ipa/61340
        * ipa-pure-const.c (propagate_pure_const): Add unreachable default
        handler for switch on an ipa_ref_use enum.
        * ipa-reference.c (analyze_function): Likewise.

diff --git a/gcc/ipa-pure-const.c b/gcc/ipa-pure-const.c
index 0ebfe5d..b9a3d3e 100644
--- a/gcc/ipa-pure-const.c
+++ b/gcc/ipa-pure-const.c
@@ -1286,6 +1286,8 @@ propagate_pure_const (void)
                  break;
                case IPA_REF_ADDR:
                  break;
+               default:
+                 gcc_unreachable ();
                }
              better_state (&ref_state, &ref_looping,
                            w_l->state_previously_known,
diff --git a/gcc/ipa-reference.c b/gcc/ipa-reference.c
index ebff60c..bc58cfa 100644
--- a/gcc/ipa-reference.c
+++ b/gcc/ipa-reference.c
@@ -483,6 +483,8 @@ analyze_function (struct cgraph_node *fn)
          break;
        case IPA_REF_ADDR:
          break;
+       default:
+         gcc_unreachable ();
        }
     }