// RUN: cir-opt %s -cir-canonicalize -o - | FileCheck %s

!s32i = !cir.int<s, 32>
!rec_S = !cir.struct<"S" {!s32i}>

module {

cir.func private @dtor(!cir.ptr<!rec_S>) attributes {nothrow}
cir.func private @may_throw()
cir.func private @side_effect()

// EH cleanup with trivial body and trivial cleanup is erased (trivially dead).
cir.func @eh_both_trivial_erased() {
  cir.cleanup.scope {
    cir.yield
  } cleanup eh {
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @eh_both_trivial_erased
// CHECK-NEXT:   cir.return

// EH cleanup with trivial body and non-trivial cleanup is erased: the body
// has no throwing operations so the EH cleanup can never fire.
cir.func @eh_empty_body_nontrivial_cleanup(%arg0: !cir.ptr<!rec_S>) {
  cir.cleanup.scope {
    cir.yield
  } cleanup eh {
    cir.call @dtor(%arg0) nothrow : (!cir.ptr<!rec_S>) -> ()
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @eh_empty_body_nontrivial_cleanup
// CHECK-NEXT:   cir.return

// EH cleanup with non-empty body should NOT be erased.
cir.func @eh_nonempty_body_kept(%arg0: !cir.ptr<!rec_S>) {
  cir.cleanup.scope {
    cir.call @may_throw() : () -> ()
    cir.yield
  } cleanup eh {
    cir.call @dtor(%arg0) nothrow : (!cir.ptr<!rec_S>) -> ()
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @eh_nonempty_body_kept
// CHECK:        cir.cleanup.scope {
// CHECK:          cir.call @may_throw()
// CHECK:          cir.yield
// CHECK:        } cleanup eh {
// CHECK:          cir.call @dtor
// CHECK:          cir.yield
// CHECK:        }
// CHECK:        cir.return

// All cleanup with non-trivial cleanup should NOT be erased.
cir.func @all_nonempty_cleanup_kept(%arg0: !cir.ptr<!rec_S>) {
  cir.cleanup.scope {
    cir.yield
  } cleanup all {
    cir.call @dtor(%arg0) nothrow : (!cir.ptr<!rec_S>) -> ()
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @all_nonempty_cleanup_kept
// CHECK:        cir.cleanup.scope {
// CHECK:          cir.yield
// CHECK:        } cleanup all {
// CHECK:          cir.call @dtor
// CHECK:          cir.yield
// CHECK:        }
// CHECK:        cir.return

// Normal cleanup with non-trivial cleanup should NOT be erased.
cir.func @normal_nonempty_cleanup_kept(%arg0: !cir.ptr<!rec_S>) {
  cir.cleanup.scope {
    cir.yield
  } cleanup normal {
    cir.call @dtor(%arg0) nothrow : (!cir.ptr<!rec_S>) -> ()
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @normal_nonempty_cleanup_kept
// CHECK:        cir.cleanup.scope {
// CHECK:          cir.yield
// CHECK:        } cleanup normal {
// CHECK:          cir.call @dtor
// CHECK:          cir.yield
// CHECK:        }
// CHECK:        cir.return

// Trivial cleanup region: body is inlined and scope is erased.
cir.func @trivial_cleanup_body_inlined() {
  cir.cleanup.scope {
    cir.call @side_effect() : () -> ()
    cir.yield
  } cleanup all {
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @trivial_cleanup_body_inlined
// CHECK-NEXT:   cir.call @side_effect()
// CHECK-NEXT:   cir.return

// Trivial cleanup region with normal kind: body inlined.
cir.func @normal_trivial_cleanup_inlined() {
  cir.cleanup.scope {
    cir.call @side_effect() : () -> ()
    cir.yield
  } cleanup normal {
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @normal_trivial_cleanup_inlined
// CHECK-NEXT:   cir.call @side_effect()
// CHECK-NEXT:   cir.return

// Trivial cleanup with multiple body ops: all inlined in order.
cir.func @trivial_cleanup_multi_ops(%arg0: !cir.ptr<!rec_S>) {
  cir.cleanup.scope {
    cir.call @may_throw() : () -> ()
    cir.call @dtor(%arg0) nothrow : (!cir.ptr<!rec_S>) -> ()
    cir.yield
  } cleanup all {
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @trivial_cleanup_multi_ops
// CHECK-NEXT:   cir.call @may_throw()
// CHECK-NEXT:   cir.call @dtor
// CHECK-NEXT:   cir.return

// Nested: inner EH with empty body erased, outer kept.
cir.func @nested_inner_eh_erased(%arg0: !cir.ptr<!rec_S>) {
  cir.cleanup.scope {
    cir.call @may_throw() : () -> ()
    cir.cleanup.scope {
      cir.yield
    } cleanup eh {
      cir.call @dtor(%arg0) nothrow : (!cir.ptr<!rec_S>) -> ()
      cir.yield
    }
    cir.yield
  } cleanup eh {
    cir.call @dtor(%arg0) nothrow : (!cir.ptr<!rec_S>) -> ()
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @nested_inner_eh_erased
// CHECK:        cir.cleanup.scope {
// CHECK:          cir.call @may_throw()
// CHECK-NOT:      cir.cleanup.scope
// CHECK:          cir.yield
// CHECK:        } cleanup eh {
// CHECK:          cir.call @dtor
// CHECK:          cir.yield
// CHECK:        }
// CHECK:        cir.return

// Nested: inner has trivial cleanup, outer does not. Inner body inlined
// into outer body; outer remains.
cir.func @nested_trivial_cleanup_inlined(%arg0: !cir.ptr<!rec_S>) {
  cir.cleanup.scope {
    cir.cleanup.scope {
      cir.call @may_throw() : () -> ()
      cir.yield
    } cleanup eh {
      cir.yield
    }
    cir.yield
  } cleanup all {
    cir.call @dtor(%arg0) nothrow : (!cir.ptr<!rec_S>) -> ()
    cir.yield
  }
  cir.return
}
// CHECK-LABEL: @nested_trivial_cleanup_inlined
// CHECK:        cir.cleanup.scope {
// CHECK-NEXT:     cir.call @may_throw()
// CHECK-NEXT:     cir.yield
// CHECK-NEXT:   } cleanup all {
// CHECK:          cir.call @dtor
// CHECK:          cir.yield
// CHECK:        }
// CHECK:        cir.return

}