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83
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1 ; RUN: opt < %s -indvars -S | FileCheck %s
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2 target triple = "aarch64--linux-gnu"
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3
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95
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4 ; Provide legal integer types.
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5 target datalayout = "n8:16:32:64"
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6
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7
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83
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8 ; Check the loop exit i32 compare instruction and operand are widened to i64
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9 ; instead of truncating IV before its use in the i32 compare instruction.
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10
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11 @idx = common global i32 0, align 4
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12 @e = common global i32 0, align 4
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13 @ptr = common global i32* null, align 8
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14
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15 ; CHECK-LABEL: @test1
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16 ; CHECK: for.body.lr.ph:
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17 ; CHECK: sext i32
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18 ; CHECK: for.cond:
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19 ; CHECK: icmp slt i64
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20 ; CHECK: for.body:
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21 ; CHECK: phi i64
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22
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23 define i32 @test1() {
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24 entry:
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25 store i32 -1, i32* @idx, align 4
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95
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26 %0 = load i32, i32* @e, align 4
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83
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27 %cmp4 = icmp slt i32 %0, 0
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28 br i1 %cmp4, label %for.end.loopexit, label %for.body.lr.ph
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29
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30 for.body.lr.ph:
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95
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31 %1 = load i32*, i32** @ptr, align 8
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32 %2 = load i32, i32* @e, align 4
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83
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33 br label %for.body
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34
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35 for.cond:
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36 %inc = add nsw i32 %i.05, 1
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37 %cmp = icmp slt i32 %i.05, %2
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38 br i1 %cmp, label %for.body, label %for.cond.for.end.loopexit_crit_edge
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39
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40 for.body:
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41 %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.cond ]
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42 %idxprom = sext i32 %i.05 to i64
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95
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43 %arrayidx = getelementptr inbounds i32, i32* %1, i64 %idxprom
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44 %3 = load i32, i32* %arrayidx, align 4
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83
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45 %tobool = icmp eq i32 %3, 0
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46 br i1 %tobool, label %if.then, label %for.cond
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47
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48 if.then:
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49 %i.05.lcssa = phi i32 [ %i.05, %for.body ]
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50 store i32 %i.05.lcssa, i32* @idx, align 4
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51 br label %for.end
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52
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53 for.cond.for.end.loopexit_crit_edge:
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54 br label %for.end.loopexit
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55
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56 for.end.loopexit:
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57 br label %for.end
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58
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59 for.end:
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95
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60 %4 = load i32, i32* @idx, align 4
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83
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61 ret i32 %4
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62 }
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63
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64 ; CHECK-LABEL: @test2
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65 ; CHECK: for.body4.us
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66 ; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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121
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67 ; CHECK: %cmp2.us = icmp ult i64
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83
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68 ; CHECK-NOT: %2 = trunc i64 %indvars.iv.next to i32
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69 ; CHECK-NOT: %cmp2.us = icmp slt i32
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70
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71 define void @test2([8 x i8]* %a, i8* %b, i8 %limit) {
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72 entry:
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73 %conv = zext i8 %limit to i32
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74 br i1 undef, label %for.cond1.preheader, label %for.cond1.preheader.us
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75
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76 for.cond1.preheader.us:
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77 %storemerge5.us = phi i32 [ 0, %entry ], [ %inc14.us, %for.inc13.us ]
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78 br i1 true, label %for.body4.lr.ph.us, label %for.inc13.us
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79
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80 for.inc13.us:
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81 %inc14.us = add nsw i32 %storemerge5.us, 1
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82 %cmp.us = icmp slt i32 %inc14.us, 4
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83 br i1 %cmp.us, label %for.cond1.preheader.us, label %for.end
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84
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85 for.body4.us:
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86 %storemerge14.us = phi i32 [ 0, %for.body4.lr.ph.us ], [ %inc.us, %for.body4.us ]
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87 %idxprom.us = sext i32 %storemerge14.us to i64
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95
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88 %arrayidx6.us = getelementptr inbounds [8 x i8], [8 x i8]* %a, i64 %idxprom5.us, i64 %idxprom.us
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89 %0 = load i8, i8* %arrayidx6.us, align 1
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83
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90 %idxprom7.us = zext i8 %0 to i64
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95
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91 %arrayidx8.us = getelementptr inbounds i8, i8* %b, i64 %idxprom7.us
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92 %1 = load i8, i8* %arrayidx8.us, align 1
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83
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93 store i8 %1, i8* %arrayidx6.us, align 1
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94 %inc.us = add nsw i32 %storemerge14.us, 1
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95 %cmp2.us = icmp slt i32 %inc.us, %conv
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96 br i1 %cmp2.us, label %for.body4.us, label %for.inc13.us
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97
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98 for.body4.lr.ph.us:
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99 %idxprom5.us = sext i32 %storemerge5.us to i64
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100 br label %for.body4.us
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101
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102 for.cond1.preheader:
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103 %storemerge5 = phi i32 [ 0, %entry ], [ %inc14, %for.inc13 ]
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104 br i1 false, label %for.inc13, label %for.inc13
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105
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106 for.inc13:
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107 %inc14 = add nsw i32 %storemerge5, 1
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108 %cmp = icmp slt i32 %inc14, 4
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109 br i1 %cmp, label %for.cond1.preheader, label %for.end
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110
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111 for.end:
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112 ret void
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113 }
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114
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115 ; CHECK-LABEL: @test3
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116 ; CHECK: sext i32 %b
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117 ; CHECK: for.cond:
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118 ; CHECK: phi i64
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119 ; CHECK: icmp slt i64
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120
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121 define i32 @test3(i32* %a, i32 %b) {
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122 entry:
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123 br label %for.cond
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124
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125 for.cond:
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126 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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127 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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128 %cmp = icmp slt i32 %i.0, %b
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129 br i1 %cmp, label %for.body, label %for.end
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130
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131 for.body:
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132 %idxprom = sext i32 %i.0 to i64
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95
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133 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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134 %0 = load i32, i32* %arrayidx, align 4
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83
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135 %add = add nsw i32 %sum.0, %0
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136 %inc = add nsw i32 %i.0, 1
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137 br label %for.cond
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138
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139 for.end:
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140 ret i32 %sum.0
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141 }
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142
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143 declare i32 @fn1(i8 signext)
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144
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145 ; PR21030
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146 ; CHECK-LABEL: @test4
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147 ; CHECK: for.body:
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148 ; CHECK: phi i32
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149 ; CHECK: icmp sgt i8
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150
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151 define i32 @test4(i32 %a) {
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152 entry:
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153 br label %for.body
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154
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155 for.body:
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156 %c.07 = phi i8 [ -3, %entry ], [ %dec, %for.body ]
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157 %conv6 = zext i8 %c.07 to i32
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158 %or = or i32 %a, %conv6
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159 %conv3 = trunc i32 %or to i8
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160 %call = call i32 @fn1(i8 signext %conv3)
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161 %dec = add i8 %c.07, -1
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162 %cmp = icmp sgt i8 %dec, -14
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163 br i1 %cmp, label %for.body, label %for.end
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164
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165 for.end:
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166 ret i32 0
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167 }
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168
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169 ; CHECK-LABEL: @test5
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170 ; CHECK: zext i32 %b
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171 ; CHECK: for.cond:
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172 ; CHECK: phi i64
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173 ; CHECK: icmp ule i64
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174
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175 define i32 @test5(i32* %a, i32 %b) {
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176 entry:
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177 br label %for.cond
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178
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179 for.cond:
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180 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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181 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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182 %cmp = icmp ule i32 %i.0, %b
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183 br i1 %cmp, label %for.body, label %for.end
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184
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185 for.body:
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186 %idxprom = zext i32 %i.0 to i64
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95
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187 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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188 %0 = load i32, i32* %arrayidx, align 4
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189 %add = add nsw i32 %sum.0, %0
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190 %inc = add nsw i32 %i.0, 1
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191 br label %for.cond
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192
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193 for.end:
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194 ret i32 %sum.0
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195 }
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196
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197 define i32 @test6(i32* %a, i32 %b) {
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198 ; CHECK-LABEL: @test6(
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199 ; CHECK: [[B_SEXT:%[a-z0-9]+]] = sext i32 %b to i64
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200 ; CHECK: for.cond:
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201 ; CHECK: icmp sle i64 %indvars.iv, [[B_SEXT]]
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202
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203 entry:
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204 br label %for.cond
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205
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206 for.cond:
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207 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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208 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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209 %cmp = icmp sle i32 %i.0, %b
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210 br i1 %cmp, label %for.body, label %for.end
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211
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212 for.body:
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213 %idxprom = zext i32 %i.0 to i64
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214 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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215 %0 = load i32, i32* %arrayidx, align 4
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83
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216 %add = add nsw i32 %sum.0, %0
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217 %inc = add nsw i32 %i.0, 1
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218 br label %for.cond
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219
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220 for.end:
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221 ret i32 %sum.0
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222 }
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95
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223
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224 define i32 @test7(i32* %a, i32 %b) {
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225 ; CHECK-LABEL: @test7(
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226 ; CHECK: [[B_ZEXT:%[a-z0-9]+]] = zext i32 %b to i64
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227 ; CHECK: [[B_SEXT:%[a-z0-9]+]] = sext i32 %b to i64
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228 ; CHECK: for.cond:
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229 ; CHECK: icmp ule i64 %indvars.iv, [[B_ZEXT]]
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230 ; CHECK: for.body:
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231 ; CHECK: icmp sle i64 %indvars.iv, [[B_SEXT]]
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232
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233 entry:
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234 br label %for.cond
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235
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236 for.cond:
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237 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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238 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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239 %cmp = icmp ule i32 %i.0, %b
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240 br i1 %cmp, label %for.body, label %for.end
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241
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242 for.body:
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243 %idxprom = sext i32 %i.0 to i64
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244 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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245 %0 = load i32, i32* %arrayidx, align 4
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246 %add = add nsw i32 %sum.0, %0
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247 %inc = add nsw i32 %i.0, 1
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248 %cmp2 = icmp sle i32 %i.0, %b
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249 br i1 %cmp2, label %for.cond, label %for.end
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250
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251 for.end:
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252 ret i32 %sum.0
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253 }
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254
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255 define i32 @test8(i32* %a, i32 %b, i32 %init) {
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256 ; CHECK-LABEL: @test8(
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257 ; CHECK: [[INIT_SEXT:%[a-z0-9]+]] = sext i32 %init to i64
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258 ; CHECK: [[B_ZEXT:%[a-z0-9]+]] = zext i32 %b to i64
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259 ; CHECK: for.cond:
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260 ; Note: %indvars.iv is the sign extension of %i.0
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261 ; CHECK: %indvars.iv = phi i64 [ [[INIT_SEXT]], %for.cond.preheader ], [ %indvars.iv.next, %for.body ]
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262 ; CHECK: icmp ule i64 %indvars.iv, [[B_ZEXT]]
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263
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264 entry:
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265 %e = icmp sgt i32 %init, 0
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266 br i1 %e, label %for.cond, label %leave
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267
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268 for.cond:
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269 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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270 %i.0 = phi i32 [ %init, %entry ], [ %inc, %for.body ]
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271 %cmp = icmp ule i32 %i.0, %b
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272 br i1 %cmp, label %for.body, label %for.end
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273
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274 for.body:
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275 %idxprom = sext i32 %i.0 to i64
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276 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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277 %0 = load i32, i32* %arrayidx, align 4
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278 %add = add nsw i32 %sum.0, %0
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279 %inc = add nsw i32 %i.0, 1
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280 %cmp2 = icmp slt i32 0, %inc
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281 br i1 %cmp2, label %for.cond, label %for.end
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282
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283 for.end:
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284 ret i32 %sum.0
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285
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286 leave:
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287 ret i32 0
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288 }
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289
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290 define i32 @test9(i32* %a, i32 %b, i32 %init) {
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291 ; CHECK-LABEL: @test9(
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292 ; CHECK: [[INIT_ZEXT:%[a-z0-9]+]] = zext i32 %init to i64
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293 ; CHECK: [[B_SEXT:%[a-z0-9]+]] = sext i32 %b to i64
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294 ; CHECK: for.cond:
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295 ; Note: %indvars.iv is the zero extension of %i.0
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296 ; CHECK: %indvars.iv = phi i64 [ [[INIT_ZEXT]], %for.cond.preheader ], [ %indvars.iv.next, %for.body ]
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297 ; CHECK: icmp slt i64 %indvars.iv, [[B_SEXT]]
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298
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299 entry:
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300 %e = icmp sgt i32 %init, 0
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301 br i1 %e, label %for.cond, label %leave
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302
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303 for.cond:
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304 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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305 %i.0 = phi i32 [ %init, %entry ], [ %inc, %for.body ]
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306 %cmp = icmp slt i32 %i.0, %b
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307 br i1 %cmp, label %for.body, label %for.end
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308
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309 for.body:
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310 %idxprom = zext i32 %i.0 to i64
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311 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %idxprom
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312 %0 = load i32, i32* %arrayidx, align 4
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313 %add = add nsw i32 %sum.0, %0
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314 %inc = add nsw i32 %i.0, 1
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315 %cmp2 = icmp slt i32 0, %inc
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316 br i1 %cmp2, label %for.cond, label %for.end
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317
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318 for.end:
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319 ret i32 %sum.0
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320
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321 leave:
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322 ret i32 0
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323 }
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324
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325 declare void @consume.i64(i64)
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326 declare void @consume.i1(i1)
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327
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328 define i32 @test10(i32 %v) {
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329 ; CHECK-LABEL: @test10(
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330 entry:
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331 ; CHECK-NOT: zext
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332 br label %loop
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333
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334 loop:
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335 ; CHECK: loop:
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336 ; CHECK: %indvars.iv = phi i64 [ %indvars.iv.next, %loop ], [ 0, %entry ]
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337 ; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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338 ; CHECK: [[MUL:%[a-z0-9]+]] = mul nsw i64 %indvars.iv, -1
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339 ; CHECK: [[MUL_TRUNC:%[a-z0-9]+]] = trunc i64 [[MUL]] to i32
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340 ; CHECK: [[CMP:%[a-z0-9]+]] = icmp eq i32 [[MUL_TRUNC]], %v
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341 ; CHECK: call void @consume.i1(i1 [[CMP]])
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342
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343 %i = phi i32 [ 0, %entry ], [ %i.inc, %loop ]
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344 %i.inc = add i32 %i, 1
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345 %iv = mul i32 %i, -1
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346 %cmp = icmp eq i32 %iv, %v
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347 call void @consume.i1(i1 %cmp)
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348 %be.cond = icmp slt i32 %i.inc, 11
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349 %ext = sext i32 %iv to i64
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350 call void @consume.i64(i64 %ext)
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351 br i1 %be.cond, label %loop, label %leave
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|
|
352
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|
|
353 leave:
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354 ret i32 22
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|
|
355 }
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