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annotate test/Feature/cfgstructures.ll @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llvm-as < %s | llvm-dis > %t1.ll
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2 ; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
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3 ; RUN: diff %t1.ll %t2.ll
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4
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5 ;; This is an irreducible flow graph
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6 define void @irreducible(i1 %cond) {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 br i1 %cond, label %X, label %Y
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8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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9 X: ; preds = %Y, %0
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10 br label %Y
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11
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12 Y: ; preds = %X, %0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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13 br label %X
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14 }
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16 ;; This is a pair of loops that share the same header
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17 define void @sharedheader(i1 %cond) {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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18 br label %A
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19
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20 A: ; preds = %Y, %X, %0
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21 br i1 %cond, label %X, label %Y
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22
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23 X: ; preds = %A
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24 br label %A
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25
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26 Y: ; preds = %A
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27 br label %A
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28 }
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31 ;; This is a simple nested loop
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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32 define void @nested(i1 %cond1, i1 %cond2, i1 %cond3) {
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33 br label %Loop1
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34
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35 Loop1: ; preds = %L2Exit, %0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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36 br label %Loop2
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37
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38 Loop2: ; preds = %L3Exit, %Loop1
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39 br label %Loop3
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40
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41 Loop3: ; preds = %Loop3, %Loop2
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42 br i1 %cond3, label %Loop3, label %L3Exit
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43
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44 L3Exit: ; preds = %Loop3
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45 br i1 %cond2, label %Loop2, label %L2Exit
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46
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47 L2Exit: ; preds = %L3Exit
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48 br i1 %cond1, label %Loop1, label %L1Exit
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49
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50 L1Exit: ; preds = %L2Exit
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51 ret void
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52 }
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