// RUN: cir-opt %s --verify-roundtrip | FileCheck %s

!s8i = !cir.int<s, 8>
!u8i = !cir.int<u, 8>
!void = !cir.void
!rec_E = !cir.struct<"E" padded {!u8i}>

module {

cir.global "private" constant external @_ZTI1E : !cir.ptr<!u8i>

// A CIRGen-style catch-init helper thunk: takes (dest, src) and returns void.
// `cir.construct_catch_param` references this function via its `copy_fn`
// attribute; the verifier checks the symbol resolves and matches the
// (T*, T*) -> void signature.
cir.func linkonce_odr hidden @__clang_cir_catch_copy__ZTS1E(
    %arg0: !cir.ptr<!rec_E>, %arg1: !cir.ptr<!rec_E>)
    attributes {cir.eh.catch_copy_thunk} {
  cir.return
}

// CHECK: cir.func linkonce_odr hidden @__clang_cir_catch_copy__ZTS1E(
// CHECK-SAME: attributes {cir.eh.catch_copy_thunk}
// CHECK:   cir.return
// CHECK: }

// Positive shape: a `cir.try` whose typed catch handler region begins with
// `cir.construct_catch_param` (referring to an alloca defined in the
// enclosing scope) followed by `cir.begin_catch`.
cir.func @construct_catch_param_basic() {
  cir.scope {
    %param = cir.alloca !rec_E, !cir.ptr<!rec_E>, ["e"] {alignment = 1 : i64}
    cir.try {
      cir.yield
    } catch [type #cir.global_view<@_ZTI1E> : !cir.ptr<!u8i>]
        (%eh_token: !cir.eh_token) {
      cir.construct_catch_param non_trivial_copy %eh_token to %param
        using @__clang_cir_catch_copy__ZTS1E : !cir.ptr<!rec_E>
      %catch_token, %exn_ptr = cir.begin_catch %eh_token
        : !cir.eh_token -> (!cir.catch_token, !cir.ptr<!void>)
      cir.cleanup.scope {
        cir.yield
      } cleanup eh {
        cir.end_catch %catch_token : !cir.catch_token
        cir.yield
      }
      cir.yield
    }
  }
  cir.return
}

// CHECK-LABEL: cir.func @construct_catch_param_basic()
// CHECK:         %[[E:.*]] = cir.alloca !rec_E, !cir.ptr<!rec_E>, ["e"]
// CHECK:         cir.try {
// CHECK:           cir.yield
// CHECK:         } catch [type #cir.global_view<@_ZTI1E> : !cir.ptr<!u8i>]
// CHECK-SAME:        (%[[EH:.*]]: !cir.eh_token) {
// CHECK:           cir.construct_catch_param non_trivial_copy %[[EH]] to %[[E]]
// CHECK-SAME:        using @__clang_cir_catch_copy__ZTS1E : !cir.ptr<!rec_E>
// CHECK:           cir.begin_catch %[[EH]]

}