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annotate test/Transforms/InstCombine/alloca.ll @ 83:60c9769439b8 LLVM3.7

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LLVM 3.7
author Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
date Wed, 18 Feb 2015 14:55:36 +0900
parents 54457678186b
children afa8332a0e37
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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1 ; RUN: opt < %s -instcombine -S -default-data-layout="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" | FileCheck %s
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2 ; RUN: opt < %s -instcombine -S -default-data-layout="E-p:32:32:32-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" | FileCheck %s -check-prefix=P32
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3 ; RUN: opt < %s -instcombine -S | FileCheck %s -check-prefix=NODL
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4
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5
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6 declare void @use(...)
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7
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8 @int = global i32 zeroinitializer
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9
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10 ; Zero byte allocas should be merged if they can't be deleted.
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11 ; CHECK-LABEL: @test(
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12 ; CHECK: alloca
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13 ; CHECK-NOT: alloca
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14 define void @test() {
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15 %X = alloca [0 x i32] ; <[0 x i32]*> [#uses=1]
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16 call void (...)* @use( [0 x i32]* %X )
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17 %Y = alloca i32, i32 0 ; <i32*> [#uses=1]
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18 call void (...)* @use( i32* %Y )
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19 %Z = alloca { } ; <{ }*> [#uses=1]
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20 call void (...)* @use( { }* %Z )
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21 %size = load i32* @int
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22 %A = alloca {{}}, i32 %size
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23 call void (...)* @use( {{}}* %A )
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24 ret void
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25 }
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26
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27 ; Zero byte allocas should be deleted.
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28 ; CHECK-LABEL: @test2(
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29 ; CHECK-NOT: alloca
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30 define void @test2() {
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31 %A = alloca i32 ; <i32*> [#uses=1]
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32 store i32 123, i32* %A
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33 ret void
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34 }
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35
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36 ; Zero byte allocas should be deleted.
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37 ; CHECK-LABEL: @test3(
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38 ; CHECK-NOT: alloca
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39 define void @test3() {
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40 %A = alloca { i32 } ; <{ i32 }*> [#uses=1]
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41 %B = getelementptr { i32 }* %A, i32 0, i32 0 ; <i32*> [#uses=1]
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42 store i32 123, i32* %B
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43 ret void
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44 }
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45
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46 ; CHECK-LABEL: @test4(
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47 ; CHECK: = zext i32 %n to i64
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48 ; CHECK: %A = alloca i32, i64 %
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49 define i32* @test4(i32 %n) {
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50 %A = alloca i32, i32 %n
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51 ret i32* %A
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52 }
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53
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54 ; Allocas which are only used by GEPs, bitcasts, and stores (transitively)
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55 ; should be deleted.
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56 define void @test5() {
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57 ; CHECK-LABEL: @test5(
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58 ; CHECK-NOT: alloca
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59 ; CHECK-NOT: store
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60 ; CHECK: ret
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61
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62 entry:
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63 %a = alloca { i32 }
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64 %b = alloca i32*
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65 %a.1 = getelementptr { i32 }* %a, i32 0, i32 0
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66 store i32 123, i32* %a.1
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67 store i32* %a.1, i32** %b
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68 %b.1 = bitcast i32** %b to i32*
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69 store i32 123, i32* %b.1
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70 %a.2 = getelementptr { i32 }* %a, i32 0, i32 0
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71 store atomic i32 2, i32* %a.2 unordered, align 4
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72 %a.3 = getelementptr { i32 }* %a, i32 0, i32 0
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73 store atomic i32 3, i32* %a.3 release, align 4
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74 %a.4 = getelementptr { i32 }* %a, i32 0, i32 0
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75 store atomic i32 4, i32* %a.4 seq_cst, align 4
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76 ret void
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77 }
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78
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79 declare void @f(i32* %p)
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80
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81 ; Check that we don't delete allocas in some erroneous cases.
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82 define void @test6() {
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83 ; CHECK-LABEL: @test6(
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84 ; CHECK-NOT: ret
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85 ; CHECK: alloca
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86 ; CHECK-NEXT: alloca
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87 ; CHECK: ret
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88
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89 entry:
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90 %a = alloca { i32 }
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91 %b = alloca i32
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92 %a.1 = getelementptr { i32 }* %a, i32 0, i32 0
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93 store volatile i32 123, i32* %a.1
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94 tail call void @f(i32* %b)
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95 ret void
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96 }
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97
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98 ; PR14371
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99 %opaque_type = type opaque
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100 %real_type = type { { i32, i32* } }
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101
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102 @opaque_global = external constant %opaque_type, align 4
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103
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104 define void @test7() {
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105 entry:
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106 %0 = alloca %real_type, align 4
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107 %1 = bitcast %real_type* %0 to i8*
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108 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %1, i8* bitcast (%opaque_type* @opaque_global to i8*), i32 8, i32 1, i1 false)
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109 ret void
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110 }
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111
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112 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
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113
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114
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115 ; Check that the GEP indices use the pointer size, or 64 if unknown
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116 define void @test8() {
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117 ; CHECK-LABEL: @test8(
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118 ; CHECK: alloca [100 x i32]
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119 ; CHECK: getelementptr inbounds [100 x i32]* %x1, i64 0, i64 0
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120
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121 ; P32-LABEL: @test8(
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122 ; P32: alloca [100 x i32]
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123 ; P32: getelementptr inbounds [100 x i32]* %x1, i32 0, i32 0
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124
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125 ; NODL-LABEL: @test8(
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126 ; NODL: alloca [100 x i32]
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127 ; NODL: getelementptr inbounds [100 x i32]* %x1, i64 0, i64 0
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128 %x = alloca i32, i32 100
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129 call void (...)* @use(i32* %x)
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130 ret void
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131 }
77
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132
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133 ; PR19569
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134 %struct_type = type { i32, i32 }
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135 declare void @test9_aux(<{ %struct_type }>* inalloca)
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136 declare i8* @llvm.stacksave()
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137 declare void @llvm.stackrestore(i8*)
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138
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139 define void @test9(%struct_type* %a) {
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140 ; CHECK-LABEL: @test9(
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141 entry:
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142 %inalloca.save = call i8* @llvm.stacksave()
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143 %argmem = alloca inalloca <{ %struct_type }>
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144 ; CHECK: alloca inalloca i64, align 8
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145 %0 = getelementptr inbounds <{ %struct_type }>* %argmem, i32 0, i32 0
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146 %1 = bitcast %struct_type* %0 to i8*
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147 %2 = bitcast %struct_type* %a to i8*
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148 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %1, i8* %2, i32 8, i32 4, i1 false)
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149 call void @test9_aux(<{ %struct_type }>* inalloca %argmem)
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150 call void @llvm.stackrestore(i8* %inalloca.save)
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151 ret void
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152 }