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a3lo Loops
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	Compile the following program (file a3lo.c) and observe the
	GIMPLE dumps.

	Source file : a3lo.c
	Compilation : gcc -c -fdump-tree-cfg a3lo.c
	View result : vi -O a3lo.c a3lo.c.*.cfg
	Clear dumps : rm -f a3lo.c.* a3lo.o

Program
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	double CompoundInterest(double Principal, double Interest, int Years)
	{
	    double Value;
	    for(Value = Principal; Years > 0; --Years) 
	    {
		Value = Value * Interest / 100;
	    }
	    return Value;
	}

Questions
---------

	1   How does GCC convert for-loops into GIMPLE? Can you draw a CFG of
	    this program?
	    
	2   Do you think the GIMPLE would be any different for a while-loop 
	    instead of a for-loop? If you are unsure, modify the program to 
	    use a while-loop and re-compile to observe the difference.