a7fe165684
"pure" universally means side-effect-free (GCC __attribute__((pure)), FP purity, D's pure) — the opposite of a register-clobbering context switch. The concept is "naked": no compiler-generated prologue/epilogue, body is raw asm that emits its own ret. That is the established term everywhere (LLVM's naked function attribute — which we literally emit — plus Zig callconv(.naked), Rust #[naked], GCC/Clang __attribute__ ((naked))). Rename the keyword + everything keyed off it so concept, surface, field, and the emitted LLVM attribute all agree. - ast.zig: ABI enum variant pure -> naked (+ doc). - parser: accept abi(.naked); error text updated. - IR Function.is_pure -> is_naked; type_resolver/decl/generic/pack/ emit_llvm references updated; diagnostics say abi(.naked). - examples 1800-1803 renamed *-pure-* -> *-naked-* (source + expected/ snapshots; .ir/.exit/.stdout/.stderr are byte-identical — the emitted IR is unchanged, only the keyword spelling differs). - docs (PLAN-FIBERS, CHECKPOINT-FIBERS, PLAN-POST-METATYPE, the design roadmap, the compiler-API checkpoint/design) updated; the naming rationale now records why .naked over .pure. No semantic change — pure cosmetics. Suite green (725/0).
20 lines
779 B
Plaintext
20 lines
779 B
Plaintext
// Stream B1 (fibers) — x86_64 sibling of 1800: `abi(.pure)` emits a naked
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// function whose body is raw x86_64 asm (returns 42 in eax, then its own `ret`).
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//
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// Lowered via LLVM's `naked` attribute (no prologue/epilogue/frame). x86_64-
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// pinned via `.build`: ir-only on a non-x86 host — the `.ir` snapshot locks the
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// `naked` attribute + the bare asm body (`movl $42, %eax` / `ret`) and the
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// frame-pointer-free attribute set — and runs end-to-end (exit 42) on
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// x86_64-linux. The IR text (the `naked` attribute, the `call void asm`) is
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// target-independent; only the asm string differs from the aarch64 1800.
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answer :: () -> i64 abi(.pure) {
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asm volatile {
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#string A
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movl $42, %eax
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ret
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A
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};
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}
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main :: () -> i64 { return answer(); }
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