OK then. From the Qantas Flight Administration Manual, Chapter 21B, Standard Operating Procedures, Para 21.61:
"Flight Crew are encouraged to perform a Missed Approach whenever any doubt exists as to the safe continuation of an approach and landing."
Neither SOPs nor the FCOM give guidance on specific combinations of events such as a hard landing followed immediately by windshear warning. They would run into multiple volumes if they gave instructions for every combination.
Nuff said.