1040b8c776
Restructures the .asm_expr lowering arm into lowerAsmExpr, which validates the
asm shape with specific named diagnostics BEFORE the not-yet-implemented codegen
bail, so the user sees the real problem first. Two checklist items enforced:
- template must be a compile-time-known string ("..." or #string), not a
runtime expression;
- an asm with no value outputs must be `volatile` (else its effects could be
deleted) — mirrors Zig's rule.
Valid shapes still bail with the "codegen not yet implemented" message. Result-
type derivation + the operand auto-naming rule stay deferred to Phase C, where a
real IR op makes the result type observable/testable.
Locked with 1641-platform-asm-missing-volatile (the volatile error) and
1642-platform-asm-nop-volatile (no-output + volatile accepted → codegen bail).
zig build test green (650 corpus, 445 unit).
7 lines
338 B
Plaintext
7 lines
338 B
Plaintext
// ASM stream Phase B — an asm with no value outputs yields no result, so its
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// effects could be deleted unless it is marked `volatile`. This omits
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// `volatile` ⇒ a compile error. Pins that diagnostic (mirrors Zig's rule).
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// Called from `main` so lowering reaches the asm body.
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nope :: () { asm { "nop" }; }
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main :: () { nope(); }
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