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Perhaps you are calling the function with compile-time known constants - so the compiler is optimising away a lot of the code.
If the function isn't 'static' that shouldn't happen.
Or pass the parameters from statically initialised global variables - which the compiler can't know aren't changed before the call.
AlphaKha> Let me provide some more detail:
In both cases, the global variables are declared and initialized in main file mainsource.c to provide an easy to use list of test vectors. The values are passed to the Routine using pointers in both cases. The only difference is that in trial 2 the routine code from the mainsource.c is cut and pasted to another source file for the purpose of clarity and program organization. I am not clear how this produces the difference that in one case compiler knows about constants but in the other not. This may be the clue to this problem. Could you please comment on this.
There is also the possibility that the compiler optimisations are enabled for one file, but not the other - unlikely if you are rebuilding these with the IDE.
AlphaKh> Its ensured that compiler optimizations are enabled for all files.
If all else fails you'll need to look at the object code - that tends to show up what is actually happenning.
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AlphaKh > The obj dump file shows the same size of code in both cases and though I haven't checked the instructions line by line, however, seems the instructions are identical with one exception that address offsets are different.
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