Can function calls be reordered

Question

I am using C++98. To what extent can function calls be reordered? I am not using any global state, only state of objects local to the function.

My particular case is:

{
  RaiiType T;
  Object1.FunctionCall();
  Object2.FunctionCall();
}

Where Object1 and Object2 are declared in the next scope up. Is the constructor for T permitted to be reordered after either function call, assuming that it can be trivially proven (at least to a human) that there are no dependencies between the construction and the function calls?

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In my particular case, the RAII object is used to time the execution of the function calls.

Answer 1

So long as a standards-compliant program could not tell the difference in its observable behavior, the compiler (as well as other components in the system) may freely reorder instructions and operations however it likes.