[BOLT] Make sure IOAddressMap exist before lookup (NFC) (#183184)

`BinaryFunction::translateInputToOutputAddress()` contains fallback
logic in case that querying `IOAddressMap` doesn't yield an output
address. Because this function could be called in scenarios where
`IOAddressMap` won't be set up, we should check if the map actually
exists before lookup.

bolt/include/bolt/Core/BinaryContext.h

@@ -1560,6 +1560,7 @@ public:
     return Streamer;
   }
 
+  bool hasIOAddressMap() const { return IOAddressMap.has_value(); }
   void setIOAddressMap(AddressMap Map) { IOAddressMap = std::move(Map); }
   const AddressMap &getIOAddressMap() const {
     assert(IOAddressMap && "Address map not set yet");

bolt/lib/Core/BinaryFunction.cpp

@@ -4631,8 +4631,10 @@ uint64_t BinaryFunction::translateInputToOutputAddress(uint64_t Address) const {
 
   // Check if the address is associated with an instruction that is tracked
   // by address translation.
-  if (auto OutputAddress = BC.getIOAddressMap().lookup(Address))
-    return *OutputAddress;
+  if (BC.hasIOAddressMap()) {
+    if (auto OutputAddress = BC.getIOAddressMap().lookup(Address))
+      return *OutputAddress;
+  }
 
   // FIXME: #18950828 - we rely on relative offsets inside basic blocks to stay
   //        intact. Instead we can use pseudo instructions and/or annotations.