[move-only] Chopping off two helper functions from a larger commit.

Author: gottesmm

include/swift/SIL/MemAccessUtils.h

@@ -1254,6 +1254,8 @@ struct AccessPathWithBase {
     return AccessBase(base, accessPath.getStorage().getKind());
   }
 
+  bool isValid() const { return base && accessPath.isValid(); }
+
   bool operator==(AccessPathWithBase other) const {
     return accessPath == other.accessPath && base == other.base;
   }

lib/SILGen/ManagedValue.h

@@ -364,6 +364,11 @@ class ManagedValue {
     return bool(getValue()) || valueAndFlag.getInt();
   }
 
+  SILFunction *getFunction() const {
+    assert(getValue());
+    return getValue()->getFunction();
+  }
+
   void dump() const;
   void dump(raw_ostream &os, unsigned indent = 0) const;
   void print(raw_ostream &os) const;