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58 lines
3.5 KiB
ReStructuredText
58 lines
3.5 KiB
ReStructuredText
TODO
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====
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For next compiler release (7.4)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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BUG: fix "assignment isAugmented correctness" test
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optimize TODO in "Add assignment to initialize with zero" in StatementReorderer
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optimize TODO in after(assignment) in VariousCleanups
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optimize: add some more constant folders mentioned in test.p8
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optimize: there is an optimizations in AsmOptimizer that can only be done correctly
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if it knows about regular ram vs io space ram distinction.
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Blocked by an official Commander-x16 v39 release
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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- simplify cx16.joystick_get2() once this cx16 rom issue is resolved: https://github.com/commanderx16/x16-rom/issues/203
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(I hope this will still be included into the final v39 roms release for the cx16)
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Future
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^^^^^^
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- use UByte instead of Short
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- simplifyConditionalExpression() should not split expression if it still results in stack-based evaluation
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- remove special code generation for while and util expression
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by rewriting while and until expressions into if+jump (just consider them syntactic sugar)
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but the result should not produce larger code ofcourse!
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- while-expression should now also get the simplifyConditionalExpression() treatment
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- fix the asm-labels problem (github issue #62)
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- find a way to optimize asm-subroutine param passing where it now sometimes uses the evalstack?
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- find a way to let registerArgsViaStackEvaluation not use the stack anymore
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- document the various compiler command line options in more detail. See "Compiling program code" in the docs
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- get rid of all TODO's in the code
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- improve testability further, add more tests
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- replace certain uses of inferredType.getOr(DataType.UNDEFINED) by i.getOrElse({ errorhandler })
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- see if we can remove more "[InferredType].getOr(DataType.UNDEFINED)"
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- use more of Result<> and Either<> to handle errors/ nulls better
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- can we get rid of pieces of asmgen.AssignmentAsmGen by just reusing the AugmentableAssignment ? generated code should not suffer
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- c64: make the graphics.BITMAP_ADDRESS configurable (VIC banking)
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- optimize several inner loops in gfx2 even further?
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- add modes 2 and 3 to gfx2 (lowres 4 color and 16 color)?
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- add a flood fill routine to gfx2?
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- add a diskio.f_seek() routine for the Cx16 that uses its seek dos api?
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- make it possible for diskio to read and write from more than one file at the same time (= use multiple io channels)?
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- make it possible to use cpu opcodes such as 'nop' as variable names by prefixing all asm vars with something such as ``v_``
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- [problematic due to 64tass:] add a compiler option to not remove unused subroutines. this allows for building library programs. But this won't work with 64tass's .proc ...
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Perhaps replace all uses of .proc/.pend by .block/.bend will fix that?
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(but we lose the optimizing aspect of the assembler where it strips out unused code.
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There's not really a dynamic switch possible as all assembly lib code is static and uses one or the other)
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- introduce byte-index operator to avoid index multiplications in loops over arrays? see github issue #4
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More code optimization ideas
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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- detect variables that are written but never read - mark those as unused too and remove them, such as ``uword unused = memory("unused222", 20)`` - also remove this memory slab allocation
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- rewrite expression tree evaluation such that it doesn't use an eval stack but flatten the tree into linear code that uses a fixed number of predetermined value 'variables'
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- this removes the need for the BinExprSplitter (which is problematic now)
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