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annotate test/Analysis/BasicAA/phi-and-select.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
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1 ; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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2
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3 ; BasicAA should detect NoAliases in PHIs and Selects.
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4
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5 ; CHECK: Function: foo
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6 ; CHECK: NoAlias: double* %a, double* %b
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7 ; CHECK: Function: bar
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8 ; CHECK: NoAlias: double* %a, double* %b
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9 ; CHECK: Function: qux
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10 ; CHECK: NoAlias: double* %a, double* %b
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11 ; CHECK: Function: fin
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12 ; CHECK: NoAlias: double* %a, double* %b
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13 ; CHECK: ===== Alias Analysis Evaluator Report =====
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14
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15 ; Two PHIs in the same block.
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16 define void @foo(i1 %m, double* noalias %x, double* noalias %y) {
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17 entry:
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18 br i1 %m, label %true, label %false
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19
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20 true:
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21 br label %exit
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22
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23 false:
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24 br label %exit
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25
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26 exit:
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27 %a = phi double* [ %x, %true ], [ %y, %false ]
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28 %b = phi double* [ %x, %false ], [ %y, %true ]
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29 store volatile double 0.0, double* %a
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30 store volatile double 1.0, double* %b
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31 ret void
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32 }
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33
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34 ; Two selects with the same condition.
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35 define void @bar(i1 %m, double* noalias %x, double* noalias %y) {
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36 entry:
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37 %a = select i1 %m, double* %x, double* %y
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38 %b = select i1 %m, double* %y, double* %x
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39 store volatile double 0.000000e+00, double* %a
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40 store volatile double 1.000000e+00, double* %b
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41 ret void
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42 }
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43
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44 ; Two PHIs with disjoint sets of inputs.
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45 define void @qux(i1 %m, double* noalias %x, double* noalias %y,
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46 i1 %n, double* noalias %v, double* noalias %w) {
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47 entry:
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48 br i1 %m, label %true, label %false
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49
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50 true:
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51 br label %exit
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52
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53 false:
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54 br label %exit
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55
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56 exit:
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57 %a = phi double* [ %x, %true ], [ %y, %false ]
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58 br i1 %n, label %ntrue, label %nfalse
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59
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60 ntrue:
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61 br label %nexit
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62
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63 nfalse:
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64 br label %nexit
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65
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66 nexit:
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67 %b = phi double* [ %v, %ntrue ], [ %w, %nfalse ]
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68 store volatile double 0.0, double* %a
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69 store volatile double 1.0, double* %b
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70 ret void
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71 }
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72
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73 ; Two selects with disjoint sets of arms.
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74 define void @fin(i1 %m, double* noalias %x, double* noalias %y,
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75 i1 %n, double* noalias %v, double* noalias %w) {
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76 entry:
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77 %a = select i1 %m, double* %x, double* %y
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78 %b = select i1 %n, double* %v, double* %w
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79 store volatile double 0.000000e+00, double* %a
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80 store volatile double 1.000000e+00, double* %b
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81 ret void
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82 }