1 ; RUN: llc %s -o - | FileCheck %s 2 ; This file checks some weird corner case in LiveRangeEdit. 3 ; We used to do crash when we eliminate the definition 4 ; of the product of splitting when the original live-range 5 ; has already been removed. 6 ; Basically, we have the following input. 7 ; v1 = loadimm cst 8 ; ... 9 ; = use v1 10 ; 11 ; We split the live-range like this: 12 ; v1 = loadimm cst 13 ; ... 14 ; v2 = copy v1 15 ; ... 16 ; = use v2 17 ; 18 ; We actually issue loadimm instead of the copy: 19 ; v1 = loadimm cst 20 ; ... 21 ; v2 = loadimm cst 22 ; ... 23 ; = use v2 24 ; 25 ; v1 is now dead so we remove its live-range. 26 ; Actually, we shrink it to empty to keep the 27 ; instruction around for futher remat opportunities 28 ; (accessbile via the origin pointer.) 29 ; 30 ; Later v2 gets remove as well (e.g., because we 31 ; remat it closer to its use) and the live-range 32 ; gets eliminated. We used to crash at this point 33 ; because we were looking for a VNI of origin (v1) 34 ; at the slot index of the definition of v2. However, 35 ; we do not have a VNI for v1 at this point, since the 36 ; live-range is now empty... crash! 37 ; PR27983 38 39 source_filename = "bugpoint-output-1e29d28.bc" 40 target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128" 41 target triple = "i386-unknown-linux-gnu" 42 43 @r = external global i32, align 4 44 @k = external global i32, align 4 45 @g = external global i32, align 4 46 @a = external global i16, align 2 47 @p = external global i32, align 4 48 @n = external global i16, align 2 49 @.str = external unnamed_addr constant [12 x i8], align 1 50 @.str.1 = external unnamed_addr constant [13 x i8], align 1 51 @s = external global i32, align 4 52 @z = external global i16, align 2 53 54 ; CHECK-LABEL: fn1: 55 define void @fn1() #0 { 56 entry: 57 br label %for.cond 58 59 for.cond: ; preds = %cleanup100, %for.end29, %entry 60 %t7.0 = phi i16 [ undef, %entry ], [ %t7.1, %for.end29 ], [ %t7.19, %cleanup100 ] 61 %t9.0 = phi i32 [ undef, %entry ], [ %t9.1, %for.end29 ], [ 0, %cleanup100 ] 62 %t2.0 = phi i32 [ undef, %entry ], [ undef, %for.end29 ], [ %t2.18, %cleanup100 ] 63 %tmp = load i32, i32* @r, align 4 64 br i1 undef, label %if.then, label %if.end7 65 66 if.then: ; preds = %for.cond 67 %tobool = icmp ne i32 %tmp, 0 68 %tobool1 = icmp ne i32 %t2.0, 0 69 %tmp1 = and i1 %tobool1, %tobool 70 %land.ext = zext i1 %tmp1 to i32 71 %tmp2 = load i32, i32* @k, align 4 72 %shr = lshr i32 %land.ext, %tmp2 73 %tobool4 = icmp ne i32 %shr, 0 74 %or.cond = and i1 false, %tobool4 75 br i1 %or.cond, label %L6, label %if.end7 76 77 if.end7: ; preds = %if.then, %for.cond 78 %t2.1 = phi i32 [ %shr, %if.then ], [ %t2.0, %for.cond ] 79 %tobool8 = icmp eq i32 undef, 0 80 br i1 %tobool8, label %if.end11, label %for.cond10 81 82 for.cond10: ; preds = %for.cond10, %if.end7 83 br label %for.cond10 84 85 if.end11: ; preds = %if.end7 86 %tmp3 = load i32, i32* @g, align 4 87 %tmp4 = load i16, i16* @a, align 2 88 %conv = sext i16 %tmp4 to i32 89 %div = sdiv i32 %tmp3, %conv 90 %tobool12 = icmp eq i32 %div, 0 91 br i1 %tobool12, label %for.cond15, label %L5 92 93 for.cond15: ; preds = %for.cond17, %if.end11 94 %t7.1 = phi i16 [ %t7.2, %for.cond17 ], [ %t7.0, %if.end11 ] 95 %t9.1 = phi i32 [ %t9.2, %for.cond17 ], [ %t9.0, %if.end11 ] 96 %tobool16 = icmp eq i32 undef, 0 97 br i1 %tobool16, label %for.end29, label %for.cond17 98 99 for.cond17: ; preds = %for.cond20, %for.cond15 100 %t7.2 = phi i16 [ %t7.3, %for.cond20 ], [ %t7.1, %for.cond15 ] 101 %t9.2 = phi i32 [ undef, %for.cond20 ], [ %t9.1, %for.cond15 ] 102 %tobool18 = icmp eq i8 undef, 0 103 br i1 %tobool18, label %for.cond15, label %for.cond20 104 105 for.cond20: ; preds = %for.cond23, %for.cond17 106 %t7.3 = phi i16 [ %t7.4, %for.cond23 ], [ %t7.2, %for.cond17 ] 107 %tobool21 = icmp eq i32 undef, 0 108 br i1 %tobool21, label %for.cond17, label %for.cond23 109 110 for.cond23: ; preds = %L1, %for.cond20 111 %t7.4 = phi i16 [ %t7.5, %L1 ], [ %t7.3, %for.cond20 ] 112 %tobool24 = icmp eq i8 undef, 0 113 br i1 %tobool24, label %for.cond20, label %L1 114 115 L1: ; preds = %cleanup100, %for.cond23 116 %t7.5 = phi i16 [ %t7.19, %cleanup100 ], [ %t7.4, %for.cond23 ] 117 %conv26 = sext i16 undef to i64 118 br label %for.cond23 119 120 for.end29: ; preds = %for.cond15 121 br i1 undef, label %for.cond, label %for.cond32thread-pre-split 122 123 for.cond32thread-pre-split: ; preds = %for.end29 124 %.pr = load i32, i32* @p, align 4 125 br label %for.cond32 126 127 for.cond32: ; preds = %for.inc94, %for.cond32thread-pre-split 128 %t7.6 = phi i16 [ %t7.1, %for.cond32thread-pre-split ], [ %t7.17, %for.inc94 ] 129 %t3.4 = phi i64 [ 0, %for.cond32thread-pre-split ], [ 0, %for.inc94 ] 130 %t9.6 = phi i32 [ %t9.1, %for.cond32thread-pre-split ], [ 0, %for.inc94 ] 131 %t2.7 = phi i32 [ undef, %for.cond32thread-pre-split ], [ %t2.16, %for.inc94 ] 132 %tobool33 = icmp eq i32 0, 0 133 br i1 %tobool33, label %for.end95, label %for.body34 134 135 for.body34: ; preds = %for.cond32 136 %tobool35 = icmp eq i16 undef, 0 137 br i1 %tobool35, label %for.inc94, label %if.then36 138 139 if.then36: ; preds = %for.body34 140 %tmp5 = load i16, i16* @n, align 2 141 %tobool37 = icmp eq i32 undef, 0 142 br i1 %tobool37, label %if.end78, label %if.then38 143 144 if.then38: ; preds = %if.then36 145 tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i64 undef) 146 %tobool40 = icmp eq i32 undef, 0 147 br i1 %tobool40, label %L3, label %cleanup100 148 149 L3: ; preds = %while.end.split, %if.then38 150 %t7.7 = phi i16 [ %tmp5, %if.then38 ], [ %t7.15, %while.end.split ] 151 %t3.5 = phi i64 [ %t3.4, %if.then38 ], [ %t3.11, %while.end.split ] 152 %t2.8 = phi i32 [ %t2.7, %if.then38 ], [ %t2.14, %while.end.split ] 153 %tobool43 = icmp eq i32 undef, 0 154 br i1 %tobool43, label %if.end48, label %cleanup75 155 156 if.end48: ; preds = %L3 157 tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i32 0, i32 0), i64 %t3.5) 158 br i1 undef, label %if.end61, label %for.cond52.preheader 159 160 for.cond52.preheader: ; preds = %if.end48 161 %tobool57 = icmp eq i16 undef, 0 162 %.130 = select i1 %tobool57, i16 -8, i16 0 163 br label %if.end61 164 165 if.end61: ; preds = %for.cond52.preheader, %if.end48 166 %t7.9 = phi i16 [ %t7.7, %if.end48 ], [ %.130, %for.cond52.preheader ] 167 %tobool62 = icmp eq i32 undef, 0 168 br i1 %tobool62, label %if.end71, label %if.then63 169 170 if.then63: ; preds = %if.end61 171 br i1 undef, label %if.end67, label %L5 172 173 L5: ; preds = %cleanup100.L5_crit_edge, %if.then63, %if.end11 174 %.pre = phi i32 [ %.pre.pre, %cleanup100.L5_crit_edge ], [ undef, %if.then63 ], [ %tmp, %if.end11 ] 175 %t7.10 = phi i16 [ %t7.19, %cleanup100.L5_crit_edge ], [ %t7.9, %if.then63 ], [ %t7.0, %if.end11 ] 176 %t3.6 = phi i64 [ 0, %cleanup100.L5_crit_edge ], [ %t3.5, %if.then63 ], [ 2, %if.end11 ] 177 %t9.8 = phi i32 [ 0, %cleanup100.L5_crit_edge ], [ undef, %if.then63 ], [ %t9.0, %if.end11 ] 178 %t2.9 = phi i32 [ %t2.18, %cleanup100.L5_crit_edge ], [ %t2.8, %if.then63 ], [ %t2.1, %if.end11 ] 179 store i32 %t9.8, i32* @s, align 4 180 br label %if.end67 181 182 if.end67: ; preds = %L5, %if.then63 183 %tmp6 = phi i32 [ %.pre, %L5 ], [ undef, %if.then63 ] 184 %t7.11 = phi i16 [ %t7.10, %L5 ], [ %t7.9, %if.then63 ] 185 %t3.7 = phi i64 [ %t3.6, %L5 ], [ %t3.5, %if.then63 ] 186 %t9.9 = phi i32 [ %t9.8, %L5 ], [ undef, %if.then63 ] 187 %t2.10 = phi i32 [ %t2.9, %L5 ], [ %t2.8, %if.then63 ] 188 %tobool68 = icmp eq i32 %tmp6, 0 189 br i1 %tobool68, label %if.end71, label %for.end95 190 191 if.end71: ; preds = %if.end67, %if.end61 192 %t7.12 = phi i16 [ %t7.11, %if.end67 ], [ %t7.9, %if.end61 ] 193 %t3.8 = phi i64 [ %t3.7, %if.end67 ], [ %t3.5, %if.end61 ] 194 %tobool72 = icmp eq i32 undef, 0 195 br i1 %tobool72, label %cleanup75.thread128, label %if.then73 196 197 if.then73: ; preds = %if.end71 198 br label %cleanup100 199 200 cleanup75.thread128: ; preds = %if.end71 201 br label %if.end78 202 203 cleanup75: ; preds = %L3 204 br i1 false, label %for.cond98, label %for.end95 205 206 if.end78: ; preds = %cleanup75.thread128, %if.then36 207 %t7.14 = phi i16 [ %tmp5, %if.then36 ], [ 0, %cleanup75.thread128 ] 208 %t3.10 = phi i64 [ %t3.4, %if.then36 ], [ %t3.8, %cleanup75.thread128 ] 209 %t9.12 = phi i32 [ %t9.6, %if.then36 ], [ undef, %cleanup75.thread128 ] 210 %t2.13 = phi i32 [ %t2.7, %if.then36 ], [ undef, %cleanup75.thread128 ] 211 store i16 %t7.14, i16* @z, align 2 212 br label %L6 213 214 L6: ; preds = %if.end78, %if.then 215 %t7.15 = phi i16 [ %t7.0, %if.then ], [ %t7.14, %if.end78 ] 216 %t3.11 = phi i64 [ 2, %if.then ], [ %t3.10, %if.end78 ] 217 %t9.13 = phi i32 [ %t9.0, %if.then ], [ %t9.12, %if.end78 ] 218 %t2.14 = phi i32 [ %shr, %if.then ], [ %t2.13, %if.end78 ] 219 br i1 undef, label %while.condthread-pre-split, label %for.inc94 220 221 while.condthread-pre-split: ; preds = %L6 222 %tobool83 = icmp eq i32 undef, 0 223 br i1 %tobool83, label %while.end.split, label %while.cond 224 225 while.cond: ; preds = %while.cond, %while.condthread-pre-split 226 br label %while.cond 227 228 while.end.split: ; preds = %while.condthread-pre-split 229 %tobool84 = icmp eq i16 undef, 0 230 br i1 %tobool84, label %for.inc94, label %L3 231 232 for.inc94: ; preds = %while.end.split, %L6, %for.body34 233 %t7.17 = phi i16 [ %t7.6, %for.body34 ], [ %t7.15, %L6 ], [ %t7.15, %while.end.split ] 234 %t2.16 = phi i32 [ %t2.7, %for.body34 ], [ %t2.14, %L6 ], [ %t2.14, %while.end.split ] 235 store i32 undef, i32* @p, align 4 236 br label %for.cond32 237 238 for.end95: ; preds = %cleanup75, %if.end67, %for.cond32 239 %t7.18 = phi i16 [ %t7.6, %for.cond32 ], [ %t7.7, %cleanup75 ], [ %t7.11, %if.end67 ] 240 %t2.17 = phi i32 [ %t2.7, %for.cond32 ], [ %t2.8, %cleanup75 ], [ %t2.10, %if.end67 ] 241 %tobool96 = icmp eq i32 undef, 0 242 br i1 %tobool96, label %cleanup100, label %for.cond98 243 244 for.cond98: ; preds = %for.cond98, %for.end95, %cleanup75 245 br label %for.cond98 246 247 cleanup100: ; preds = %for.end95, %if.then73, %if.then38 248 %t7.19 = phi i16 [ %t7.18, %for.end95 ], [ %tmp5, %if.then38 ], [ %t7.12, %if.then73 ] 249 %t2.18 = phi i32 [ %t2.17, %for.end95 ], [ %t2.7, %if.then38 ], [ undef, %if.then73 ] 250 switch i32 undef, label %unreachable [ 251 i32 0, label %for.cond 252 i32 17, label %L1 253 i32 7, label %cleanup100.L5_crit_edge 254 ] 255 256 cleanup100.L5_crit_edge: ; preds = %cleanup100 257 %.pre.pre = load i32, i32* @r, align 4 258 br label %L5 259 260 unreachable: ; preds = %cleanup100 261 unreachable 262 } 263 264 ; Function Attrs: nounwind 265 declare void @printf(i8* nocapture readonly, ...) #1 266 267 attributes #0 = { noreturn nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 268 attributes #1 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 269
