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annotate test/Analysis/BasicAA/featuretest.ll @ 100:7d135dc70f03 LLVM 3.9

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LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900
parents afa8332a0e37
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ; This testcase tests for various features the basicaa test should be able to
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2 ; determine, as noted in the comments.
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3
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4 ; RUN: opt < %s -basicaa -gvn -instcombine -dce -S | FileCheck %s
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5 target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
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6
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7 @Global = external global { i32 }
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8
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9 declare void @external(i32*)
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10
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11 ; Array test: Test that operations on one local array do not invalidate
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12 ; operations on another array. Important for scientific codes.
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13 ;
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14 define i32 @different_array_test(i64 %A, i64 %B) {
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15 %Array1 = alloca i32, i32 100
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16 %Array2 = alloca i32, i32 200
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17
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18 call void @external(i32* %Array1)
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19 call void @external(i32* %Array2)
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20
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21 %pointer = getelementptr i32, i32* %Array1, i64 %A
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22 %val = load i32, i32* %pointer
0
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23
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24 %pointer2 = getelementptr i32, i32* %Array2, i64 %B
0
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25 store i32 7, i32* %pointer2
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26
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27 %REMOVE = load i32, i32* %pointer ; redundant with above load
0
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28 %retval = sub i32 %REMOVE, %val
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29 ret i32 %retval
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30 ; CHECK: @different_array_test
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31 ; CHECK: ret i32 0
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32 }
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33
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34 ; Constant index test: Constant indexes into the same array should not
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35 ; interfere with each other. Again, important for scientific codes.
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36 ;
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37 define i32 @constant_array_index_test() {
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38 %Array = alloca i32, i32 100
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39 call void @external(i32* %Array)
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40
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41 %P1 = getelementptr i32, i32* %Array, i64 7
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42 %P2 = getelementptr i32, i32* %Array, i64 6
0
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43
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44 %A = load i32, i32* %P1
0
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45 store i32 1, i32* %P2 ; Should not invalidate load
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46 %BREMOVE = load i32, i32* %P1
0
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47 %Val = sub i32 %A, %BREMOVE
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48 ret i32 %Val
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49 ; CHECK: @constant_array_index_test
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50 ; CHECK: ret i32 0
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51 }
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52
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53 ; Test that if two pointers are spaced out by a constant getelementptr, that
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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54 ; they cannot alias.
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55 define i32 @gep_distance_test(i32* %A) {
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56 %REMOVEu = load i32, i32* %A
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57 %B = getelementptr i32, i32* %A, i64 2 ; Cannot alias A
0
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58 store i32 7, i32* %B
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59 %REMOVEv = load i32, i32* %A
0
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60 %r = sub i32 %REMOVEu, %REMOVEv
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61 ret i32 %r
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62 ; CHECK: @gep_distance_test
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63 ; CHECK: ret i32 0
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64 }
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65
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66 ; Test that if two pointers are spaced out by a constant offset, that they
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parents:
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67 ; cannot alias, even if there is a variable offset between them...
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parents:
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68 define i32 @gep_distance_test2({i32,i32}* %A, i64 %distance) {
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69 %A1 = getelementptr {i32,i32}, {i32,i32}* %A, i64 0, i32 0
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70 %REMOVEu = load i32, i32* %A1
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71 %B = getelementptr {i32,i32}, {i32,i32}* %A, i64 %distance, i32 1
0
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72 store i32 7, i32* %B ; B cannot alias A, it's at least 4 bytes away
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73 %REMOVEv = load i32, i32* %A1
0
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74 %r = sub i32 %REMOVEu, %REMOVEv
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75 ret i32 %r
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76 ; CHECK: @gep_distance_test2
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77 ; CHECK: ret i32 0
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78 }
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79
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80 ; Test that we can do funny pointer things and that distance calc will still
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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81 ; work.
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82 define i32 @gep_distance_test3(i32 * %A) {
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83 %X = load i32, i32* %A
0
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84 %B = bitcast i32* %A to i8*
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85 %C = getelementptr i8, i8* %B, i64 4
0
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86 store i8 42, i8* %C
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87 %Y = load i32, i32* %A
0
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88 %R = sub i32 %X, %Y
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89 ret i32 %R
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90 ; CHECK: @gep_distance_test3
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91 ; CHECK: ret i32 0
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92 }
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93
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94 ; Test that we can disambiguate globals reached through constantexpr geps
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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95 define i32 @constexpr_test() {
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96 %X = alloca i32
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97 call void @external(i32* %X)
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98
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99 %Y = load i32, i32* %X
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100 store i32 5, i32* getelementptr ({ i32 }, { i32 }* @Global, i64 0, i32 0)
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101 %REMOVE = load i32, i32* %X
0
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102 %retval = sub i32 %Y, %REMOVE
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103 ret i32 %retval
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104 ; CHECK: @constexpr_test
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105 ; CHECK: ret i32 0
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106 }
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107
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108
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109
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110 ; PR7589
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parents:
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111 ; These two index expressions are different, this cannot be CSE'd.
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parents:
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112 define i16 @zext_sext_confusion(i16* %row2col, i5 %j) nounwind{
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parents:
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113 entry:
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114 %sum5.cast = zext i5 %j to i64 ; <i64> [#uses=1]
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115 %P1 = getelementptr i16, i16* %row2col, i64 %sum5.cast
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116 %row2col.load.1.2 = load i16, i16* %P1, align 1 ; <i16> [#uses=1]
0
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117
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118 %sum13.cast31 = sext i5 %j to i6 ; <i6> [#uses=1]
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119 %sum13.cast = zext i6 %sum13.cast31 to i64 ; <i64> [#uses=1]
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120 %P2 = getelementptr i16, i16* %row2col, i64 %sum13.cast
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121 %row2col.load.1.6 = load i16, i16* %P2, align 1 ; <i16> [#uses=1]
0
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parents:
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122
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
123 %.ret = sub i16 %row2col.load.1.6, %row2col.load.1.2 ; <i16> [#uses=1]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
124 ret i16 %.ret
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
125 ; CHECK: @zext_sext_confusion
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
126 ; CHECK: ret i16 %.ret
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
127 }