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annotate test/Transforms/ADCE/2002-05-28-Crash.ll @ 95:afa8332a0e37 LLVM3.8

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
parents 95c75e76d11b
children 803732b1fca8
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1 ; This testcase is distilled from the GNU rx package. The loop should be
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2 ; removed but causes a problem when ADCE does. The source function is:
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3 ; int rx_bitset_empty (int size, rx_Bitset set) {
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4 ; int x;
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5 ; RX_subset s;
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6 ; s = set[0];
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7 ; set[0] = 1;
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8 ; for (x = rx_bitset_numb_subsets(size) - 1; !set[x]; --x)
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9 ; ;
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10 ; set[0] = s;
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11 ; return !s;
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12 ;}
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13 ;
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14 ; RUN: opt < %s -adce
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16 define i32 @rx_bitset_empty(i32 %size, i32* %set) {
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17 bb1:
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18 %reg110 = load i32, i32* %set ; <i32> [#uses=2]
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19 store i32 1, i32* %set
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20 %cast112 = sext i32 %size to i64 ; <i64> [#uses=1]
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21 %reg113 = add i64 %cast112, 31 ; <i64> [#uses=1]
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22 %reg114 = lshr i64 %reg113, 5 ; <i64> [#uses=2]
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23 %cast109 = trunc i64 %reg114 to i32 ; <i32> [#uses=1]
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24 %reg129 = add i32 %cast109, -1 ; <i32> [#uses=1]
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25 %reg114-idxcast = trunc i64 %reg114 to i32 ; <i32> [#uses=1]
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26 %reg114-idxcast-offset = add i32 %reg114-idxcast, 1073741823 ; <i32> [#uses=1]
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27 %reg114-idxcast-offset.upgrd.1 = zext i32 %reg114-idxcast-offset to i64 ; <i64> [#uses=1]
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28 %reg124 = getelementptr i32, i32* %set, i64 %reg114-idxcast-offset.upgrd.1 ; <i32*> [#uses=1]
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29 %reg125 = load i32, i32* %reg124 ; <i32> [#uses=1]
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30 %cond232 = icmp ne i32 %reg125, 0 ; <i1> [#uses=1]
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31 br i1 %cond232, label %bb3, label %bb2
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32
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33 bb2: ; preds = %bb2, %bb1
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34 %cann-indvar = phi i32 [ 0, %bb1 ], [ %add1-indvar, %bb2 ] ; <i32> [#uses=2]
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35 %reg130-scale = mul i32 %cann-indvar, -1 ; <i32> [#uses=1]
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36 %reg130 = add i32 %reg130-scale, %reg129 ; <i32> [#uses=1]
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37 %add1-indvar = add i32 %cann-indvar, 1 ; <i32> [#uses=1]
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38 %reg130-idxcast = bitcast i32 %reg130 to i32 ; <i32> [#uses=1]
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39 %reg130-idxcast-offset = add i32 %reg130-idxcast, 1073741823 ; <i32> [#uses=1]
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40 %reg130-idxcast-offset.upgrd.2 = zext i32 %reg130-idxcast-offset to i64 ; <i64> [#uses=1]
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41 %reg118 = getelementptr i32, i32* %set, i64 %reg130-idxcast-offset.upgrd.2 ; <i32*> [#uses=1]
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42 %reg119 = load i32, i32* %reg118 ; <i32> [#uses=1]
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43 %cond233 = icmp eq i32 %reg119, 0 ; <i1> [#uses=1]
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44 br i1 %cond233, label %bb2, label %bb3
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45
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46 bb3: ; preds = %bb2, %bb1
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47 store i32 %reg110, i32* %set
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48 %cast126 = zext i32 %reg110 to i64 ; <i64> [#uses=1]
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49 %reg127 = add i64 %cast126, -1 ; <i64> [#uses=1]
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50 %reg128 = lshr i64 %reg127, 63 ; <i64> [#uses=1]
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51 %cast120 = trunc i64 %reg128 to i32 ; <i32> [#uses=1]
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52 ret i32 %cast120
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53 }
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