4b384788e6
Flip the B1.0a emit bail to real emission. The emit_llvm declaration pass now adds LLVM's naked + noinline + nounwind attributes for an is_pure function and skips frame-pointer=all (incompatible with a frameless function); Pass 2 emits the body normally, and the naked attribute makes the backend emit it verbatim (the inline asm + its own ret) with no prologue/epilogue. IR shape verified: ; Function Attrs: naked noinline nounwind define internal i64 @answer() #0 { entry: call void asm sideeffect "...ret...", ""() unreachable } The caller invokes it as an ordinary () -> i64 call (.pure is call_conv == .default). - examples/1800-concurrency-pure-asm.sx: now green, aarch64-pinned (.build macos) -> exit 42 + .ir snapshot. - examples/1801-concurrency-pure-generic.sx (renamed from -bail): the generic .pure now emits a correct naked answer__i64 (exit 42), proving generic.zig produces a naked body, not a framed one. - examples/1802-concurrency-pure-asm-x86.sx: x86_64 cross sibling (.build x86_64-linux, ir-only here); .ir locks naked + movl $42,%eax. - unit test in emit_llvm.test.zig asserts the naked attribute is present and frame-pointer absent on an abi(.pure) function. Suite green (724/0).
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42
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