Multi-return functions, global constants, and op-cost-aware function inlining#422

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mr-zwets wants to merge 15 commits into

CashScript:nextfrom

mr-zwets:feat/multi-returns

Commits on Jul 7, 2026

feat(cashc): add multi-return to global functions

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feat(cashc): destructure tuples into existing variables

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feat(cashc): add 'unused' modifier for variables and parameters

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perf(utils): faster peephole optimiser + commutative OP_MUL rule

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feat(cashc): inline global functions to remove OP_DEFINE/OP_INVOKE overhead

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perf(cashc): keep loop-resident functions OP_DEFINE'd to avoid stepping cost

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perf(cashc): gate the legacy-optimiser cross-check by size and a compiler flag

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feat(cashc): add top-level global constants

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feat(cashc): hoist repeated in-body constants under a new optimizeFor objective

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perf(cashc): stage user-function arguments right-to-left (first param on top)

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docs: document the user-function calling convention and its op-cost rationale

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perf(cashc): inline small multi-use bodies under the 'opcost' objective

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perf(cashc): altstack lowering for function-exit stack cleanup

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fix(cashc): harden tuple destructuring semantic checks

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Commits on Jul 8, 2026

fix(cashc): record the effective optimizeFor objective in artifacts

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