Gir uses two types of IR, with and without offsets
Without offsets
This is produced by parse. Each subsection shows the properties the
command object of that type has in IR without offsets
add
| property |
value |
| type |
add |
| value |
The number to add to current cell |
Generated on + and -
moveHead
| property |
value |
| type |
add |
| type |
moveHead |
| value |
The number of steps to move the tape head right |
Generated on < and >
writeByte
| property |
value |
| type |
writeByte |
Generated on .
readByte
| property |
value |
| type |
readByte |
Generated on ,
loop
| property |
value |
| type |
loop |
| contents |
An array of the commands making up the loop body |
Generated on […]
clear
| property |
value |
| type |
clear |
Not generated by the parser directly, but generated by optimizations
With offsets
This is produced by the optimization pass addOffsetProperties. Each
subsection shows the properties the command object of that type has in IR
with offsets
add
| property |
value |
| type |
add |
| value |
The number to add to the cell |
| offfset |
The location of the cell relative to current tape position |
moveHead
| property |
value |
| type |
moveHead |
| value |
The number of steps to move the tape head right |
writeByte
| property |
value |
| type |
writeByte |
| offset |
The location of the cell relative to current tape position |
readByte
| property |
value |
| type |
readByte |
| offset |
The location of the cell relative to current tape position |
loop
| property |
value |
| type |
loop |
| contents |
An array of the commands making up the loop body |
| isBalanced |
Whether execution of the loop body ends in same cell it started in |
clear
| property |
value |
| type |
clear |
| offset |
The location of the cell relative to current tape position |