llvm-project/llvm/test/TableGen/cast-multiclass.td

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// RUN: llvm-tblgen %s | FileCheck %s
class AClass<bit C> {
bit Cond = C;
}
def A0: AClass<0>;
def A1: AClass<1>;
class BoolToList<bit Value> {
list<int> ret = !if(Value, [1]<int>, []<int>);
}
multiclass P<string AStr> {
foreach i = BoolToList<!cast<AClass>(AStr).Cond>.ret in
def SubDef;
}
// CHECK-NOT: def XSubDef
defm X : P<"A0">;
// CHECK: def YSubDef
defm Y : P<"A1">;