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150
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1 // RUN: llvm-tblgen %s | FileCheck %s
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2 // XFAIL: vg_leak
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3
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4 // CHECK: --- Defs ---
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5
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6 // Test that P and Q are not replaced by ?. TableGen's codegen emitter backend
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7 // relies on keeping variable references like this around to describe the
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8 // structure of instruction encodings.
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9 //
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10 // CHECK: def A {
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11 // CHECK: bits<8> Inst = { 1, 1, 1, 1, 1, 1, P, Q };
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12 // CHECK: bits<2> src = { ?, ? };
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13 // CHECK: bit P = ?;
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14 // CHECK: bit Q = ?;
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15 // CHECK: }
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16
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17 def A {
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18 bits<8> Inst;
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19 bits<2> src;
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20
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21 bit P;
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22 bit Q;
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23
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207
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24 let Inst{7...2} = 0x3f;
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150
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25 let Inst{1} = P;
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26 let Inst{0} = Q;
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27
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28 let P = src{1};
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29 let Q = src{0};
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30 }
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31
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32 class x {
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33 field bits<32> A;
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34 }
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35
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36 class y<bits<2> B> : x {
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207
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37 let A{21...20} = B;
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150
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38 }
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39
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40 def z : y<{0,?}>;
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