return false;
}
+ /// \brief Return the value to use for the MachineCSE's LookAheadLimit,
+ /// which is a heuristic used for CSE'ing phys reg defs.
+ virtual unsigned getMachineCSELookAheadLimit () const {
+ // The default lookahead is small to prevent unprofitable quadratic
+ // behavior.
+ return 5;
+ }
+
private:
int CallFrameSetupOpcode, CallFrameDestroyOpcode;
};