1d7ea72dc8
Adds `examples/ffi-jni-call-04-jint-return.sx` exercising
`#jni_call(s32)(env, target, "getCount", "()I")` inside a runtime-
reachable but never-invoked helper (`g_should_call` stays false, so
the dereferences don't fire). Today the emit_llvm switch falls
through to `LLVMGetUndef` for any non-void return — the IR snapshot
captures that placeholder.
The next commit adds the `.s32 => 49` (CallIntMethod) arm. The
snapshot will update to show the full GetObjectClass → GetMethodID →
CallIntMethod sequence (reusing the slot interning landed in 1.17,
since `("getCount", "()I")` is a fresh literal pair).
27 lines
874 B
Plaintext
27 lines
874 B
Plaintext
// Phase 1 step 1.18 (PLAN-FFI.md): `#jni_call(s32)` (jint return).
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// Today the lowering for any non-void return drops to `LLVMGetUndef`
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// — the IR snapshot captures that placeholder. Step 1.18-fix wires
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// the `.s32 => 49` (`CallIntMethod`) arm and the snapshot updates to
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// show the full GetObjectClass + GetMethodID + CallIntMethod
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// sequence (using the cache machinery landed in 1.17).
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//
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// Runtime: unreachable. Same `g_should_call` global pattern as
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// `ffi-jni-call-03` — keeps `read_int` alive so the IR snapshot has
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// the JNI lowering visible, but the dereferences never execute.
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#import "modules/std.sx";
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g_should_call : bool = false;
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read_int :: (env: *void, target: *void) -> s32 {
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#jni_call(s32)(env, target, "getCount", "()I");
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}
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main :: () -> s32 {
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if g_should_call {
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_ := read_int(null, null);
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}
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print("ok\n");
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0;
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}
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