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make -Zwasm-c-abi=legacy suppress the lint

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This commit is contained in:
Ralf Jung 2025-03-17 22:59:56 +01:00
parent c961d123d2
commit 072ccce553
5 changed files with 15 additions and 10 deletions
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9
compiler/rustc_monomorphize/src/mono_checks/abi_check.rs
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@ -92,6 +92,7 @@ fn do_check_simd_vector_abi<'tcx>(
}
}
/// Determines whether the given argument is passed the same way on the old and new wasm ABIs.
fn wasm_abi_safe<'tcx>(tcx: TyCtxt<'tcx>, arg: &ArgAbi<'tcx, Ty<'tcx>>) -> bool {
if matches!(arg.layout.backend_repr, BackendRepr::Scalar(_)) {
return true;
@ -120,16 +121,16 @@ fn do_check_wasm_abi<'tcx>(
is_call: bool,
span: impl Fn() -> Span,
) {
// Only proceed for `extern "C" fn` on wasm32-unknown-unknown (same check as what `adjust_for_foreign_abi` uses to call `compute_wasm_abi_info`).
// Only proceed for `extern "C" fn` on wasm32-unknown-unknown (same check as what `adjust_for_foreign_abi` uses to call `compute_wasm_abi_info`),
// and only proceed if `wasm_c_abi_opt` indicates we should emit the lint.
if !(tcx.sess.target.arch == "wasm32"
&& tcx.sess.target.os == "unknown"
&& tcx.wasm_c_abi_opt() == WasmCAbi::Legacy
&& tcx.wasm_c_abi_opt() == WasmCAbi::Legacy { with_lint: true }
&& abi.conv == Conv::C)
{
return;
}
// Warn against all types whose ABI will change. That's all arguments except for things passed as scalars.
// Return values are not affected by this change.
// Warn against all types whose ABI will change. Return values are not affected by this change.
for arg_abi in abi.args.iter() {
if wasm_abi_safe(tcx, arg_abi) {
continue;