Try to group order of access to the variables from the same memory bank to the adjacent statements. This will eliminate redundant MOVLB instructions.

Original code

uns8 savedTX;
...
RTHOPS = 0xFF; // @bank5 !=
TX = savedTX;  // @bank11 != @bank5 ==
RTDEF = 2;     // @bank5

Optimized code

uns8 savedTX;
...
TX = savedTX;  // @bank11 != @bank5 ==
RTHOPS = 0xFF; // @bank5 ==
RTDEF = 2;     // @bank5

Original code 2

bank11 uns8 va_11, vb_11;
bank12 uns8 va_12, vb_12;

// @bank11 != @bank12 != @bank11 != @bank12
if ( va_11 == va_12 && vb_11 == vb_12 )
nop();

Optimized code 2

bank11 uns8 va_11, vb_11;
bank12 uns8 va_12, vb_12;

// @bank11 != @bank12 == @bank12 != @bank11
if ( va_11 == va_12 && vb_12 == vb_11 )
nop();

Effects


SAVED	NO EFFECT	FASTER

Post sent by Hynek Syrovátka.

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