Mikroelektronika MIKROE-724 データシート

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mikoBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

Optimizer has been added to extend the compiler usability, cut down the amount of code generated and speed-up its 

execution. The main features are:

Constant folding

All expressions that can be evaluated in the compile time (i.e. are constant) are being replaced by their results. (3 + 5 

-> 8); 

Constant propagation

When a constant value is being assigned to a certain variable, the compiler recognizes this and replaces the use of the 

variable by constant in the code that follows, as long as the value of a variable remains unchanged. 

Copy propagation

The compiler recognizes that two variables have the same value and eliminates one of them further in the code. 

Value numbering

The compiler “recognizes” if two expressions yield the same result and can therefore eliminate the entire computation 

for one of them. 

"Dead code" ellimination

The code snippets that are not being used elsewhere in the programme do not affect the final result of the application. 

They are automatically removed. 

Stack allocation

Temporary registers (“Stacks”) are being used more rationally, allowing VERY complex expressions to be evaluated 

with a minimum stack consumption. 

Local vars optimization

No local variables are being used if their result does not affect some of the global or volatile variables.

Better code generation and local optimization

Code generation is more consistent and more attention is payed to implement specific solutions for the code “building 

bricks” that further reduce output code size. 

Related topics: SSA Optimization, dsPIC specifics, mikroBasic PRO for dsPIC30/33 and PIC24 specifics, Memory type 

specifiers