1 ; Test a pile of objectsize bounds checking. 2 ; RUN: opt < %s -instcombine -S | FileCheck %s 3 ; We need target data to get the sizes of the arrays and structures. 4 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" 5 6 @a = private global [60 x i8] zeroinitializer, align 1 ; <[60 x i8]*> 7 @.str = private constant [8 x i8] c"abcdefg\00" ; <[8 x i8]*> 8 define i32 @foo() nounwind { 9 ; CHECK-LABEL: @foo( 10 ; CHECK-NEXT: ret i32 60 11 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false) 12 ret i32 %1 13 } 14 15 define i8* @bar() nounwind { 16 ; CHECK-LABEL: @bar( 17 entry: 18 %retval = alloca i8* 19 %0 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false) 20 %cmp = icmp ne i32 %0, -1 21 ; CHECK: br i1 true 22 br i1 %cmp, label %cond.true, label %cond.false 23 24 cond.true: 25 %1 = load i8** %retval 26 ret i8* %1 27 28 cond.false: 29 %2 = load i8** %retval 30 ret i8* %2 31 } 32 33 define i32 @f() nounwind { 34 ; CHECK-LABEL: @f( 35 ; CHECK-NEXT: ret i32 0 36 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr ([60 x i8]* @a, i32 1, i32 0), i1 false) 37 ret i32 %1 38 } 39 40 @window = external global [0 x i8] 41 42 define i1 @baz() nounwind { 43 ; CHECK-LABEL: @baz( 44 ; CHECK-NEXT: objectsize 45 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([0 x i8]* @window, i32 0, i32 0), i1 false) 46 %2 = icmp eq i32 %1, -1 47 ret i1 %2 48 } 49 50 define void @test1(i8* %q, i32 %x) nounwind noinline { 51 ; CHECK-LABEL: @test1( 52 ; CHECK: objectsize.i32.p0i8 53 entry: 54 %0 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([0 x i8]* @window, i32 0, i32 10), i1 false) ; <i64> [#uses=1] 55 %1 = icmp eq i32 %0, -1 ; <i1> [#uses=1] 56 br i1 %1, label %"47", label %"46" 57 58 "46": ; preds = %entry 59 unreachable 60 61 "47": ; preds = %entry 62 unreachable 63 } 64 65 @.str5 = private constant [9 x i32] [i32 97, i32 98, i32 99, i32 100, i32 0, i32 66 101, i32 102, i32 103, i32 0], align 4 67 define i32 @test2() nounwind { 68 ; CHECK-LABEL: @test2( 69 ; CHECK-NEXT: ret i32 34 70 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr (i8* bitcast ([9 x i32]* @.str5 to i8*), i32 2), i1 false) 71 ret i32 %1 72 } 73 74 ; rdar://7674946 75 @array = internal global [480 x float] zeroinitializer ; <[480 x float]*> [#uses=1] 76 77 declare i8* @__memcpy_chk(i8*, i8*, i32, i32) nounwind 78 79 declare i32 @llvm.objectsize.i32.p0i8(i8*, i1) nounwind readonly 80 81 declare i8* @__inline_memcpy_chk(i8*, i8*, i32) nounwind inlinehint 82 83 define void @test3() nounwind { 84 ; CHECK-LABEL: @test3( 85 entry: 86 br i1 undef, label %bb11, label %bb12 87 88 bb11: 89 %0 = getelementptr inbounds float* getelementptr inbounds ([480 x float]* @array, i32 0, i32 128), i32 -127 ; <float*> [#uses=1] 90 %1 = bitcast float* %0 to i8* ; <i8*> [#uses=1] 91 %2 = call i32 @llvm.objectsize.i32.p0i8(i8* %1, i1 false) ; <i32> [#uses=1] 92 %3 = call i8* @__memcpy_chk(i8* undef, i8* undef, i32 512, i32 %2) nounwind ; <i8*> [#uses=0] 93 ; CHECK: unreachable 94 unreachable 95 96 bb12: 97 %4 = getelementptr inbounds float* getelementptr inbounds ([480 x float]* @array, i32 0, i32 128), i32 -127 ; <float*> [#uses=1] 98 %5 = bitcast float* %4 to i8* ; <i8*> [#uses=1] 99 %6 = call i8* @__inline_memcpy_chk(i8* %5, i8* undef, i32 512) nounwind inlinehint ; <i8*> [#uses=0] 100 ; CHECK: @__inline_memcpy_chk 101 unreachable 102 } 103 104 ; rdar://7718857 105 106 %struct.data = type { [100 x i32], [100 x i32], [1024 x i8] } 107 108 define i32 @test4(i8** %esc) nounwind ssp { 109 ; CHECK-LABEL: @test4( 110 entry: 111 %0 = alloca %struct.data, align 8 112 %1 = bitcast %struct.data* %0 to i8* 113 %2 = call i32 @llvm.objectsize.i32.p0i8(i8* %1, i1 false) nounwind 114 ; CHECK-NOT: @llvm.objectsize 115 ; CHECK: @llvm.memset.p0i8.i32(i8* %1, i8 0, i32 1824, i32 8, i1 false) 116 %3 = call i8* @__memset_chk(i8* %1, i32 0, i32 1824, i32 %2) nounwind 117 store i8* %1, i8** %esc 118 ret i32 0 119 } 120 121 ; rdar://7782496 122 @s = external global i8* 123 124 define i8* @test5(i32 %n) nounwind ssp { 125 ; CHECK-LABEL: @test5( 126 entry: 127 %0 = tail call noalias i8* @malloc(i32 20) nounwind 128 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %0, i1 false) 129 %2 = load i8** @s, align 8 130 ; CHECK-NOT: @llvm.objectsize 131 ; CHECK: @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* %1, i32 10, i32 1, i1 false) 132 %3 = tail call i8* @__memcpy_chk(i8* %0, i8* %2, i32 10, i32 %1) nounwind 133 ret i8* %0 134 } 135 136 define void @test6(i32 %n) nounwind ssp { 137 ; CHECK-LABEL: @test6( 138 entry: 139 %0 = tail call noalias i8* @malloc(i32 20) nounwind 140 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %0, i1 false) 141 %2 = load i8** @s, align 8 142 ; CHECK-NOT: @llvm.objectsize 143 ; CHECK: @__memcpy_chk(i8* %0, i8* %1, i32 30, i32 20) 144 %3 = tail call i8* @__memcpy_chk(i8* %0, i8* %2, i32 30, i32 %1) nounwind 145 ret void 146 } 147 148 declare i8* @__memset_chk(i8*, i32, i32, i32) nounwind 149 150 declare noalias i8* @malloc(i32) nounwind 151 152 define i32 @test7(i8** %esc) { 153 ; CHECK-LABEL: @test7( 154 %alloc = call noalias i8* @malloc(i32 48) nounwind 155 store i8* %alloc, i8** %esc 156 %gep = getelementptr inbounds i8* %alloc, i32 16 157 %objsize = call i32 @llvm.objectsize.i32.p0i8(i8* %gep, i1 false) nounwind readonly 158 ; CHECK: ret i32 32 159 ret i32 %objsize 160 } 161 162 declare noalias i8* @calloc(i32, i32) nounwind 163 164 define i32 @test8(i8** %esc) { 165 ; CHECK-LABEL: @test8( 166 %alloc = call noalias i8* @calloc(i32 5, i32 7) nounwind 167 store i8* %alloc, i8** %esc 168 %gep = getelementptr inbounds i8* %alloc, i32 5 169 %objsize = call i32 @llvm.objectsize.i32.p0i8(i8* %gep, i1 false) nounwind readonly 170 ; CHECK: ret i32 30 171 ret i32 %objsize 172 } 173 174 declare noalias i8* @strdup(i8* nocapture) nounwind 175 declare noalias i8* @strndup(i8* nocapture, i32) nounwind 176 177 ; CHECK-LABEL: @test9( 178 define i32 @test9(i8** %esc) { 179 %call = tail call i8* @strdup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0)) nounwind 180 store i8* %call, i8** %esc, align 8 181 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true) 182 ; CHECK: ret i32 8 183 ret i32 %1 184 } 185 186 ; CHECK-LABEL: @test10( 187 define i32 @test10(i8** %esc) { 188 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 3) nounwind 189 store i8* %call, i8** %esc, align 8 190 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true) 191 ; CHECK: ret i32 4 192 ret i32 %1 193 } 194 195 ; CHECK-LABEL: @test11( 196 define i32 @test11(i8** %esc) { 197 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 7) nounwind 198 store i8* %call, i8** %esc, align 8 199 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true) 200 ; CHECK: ret i32 8 201 ret i32 %1 202 } 203 204 ; CHECK-LABEL: @test12( 205 define i32 @test12(i8** %esc) { 206 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 8) nounwind 207 store i8* %call, i8** %esc, align 8 208 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true) 209 ; CHECK: ret i32 8 210 ret i32 %1 211 } 212 213 ; CHECK-LABEL: @test13( 214 define i32 @test13(i8** %esc) { 215 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 57) nounwind 216 store i8* %call, i8** %esc, align 8 217 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true) 218 ; CHECK: ret i32 8 219 ret i32 %1 220 } 221 222 ; CHECK-LABEL: @PR13390( 223 define i32 @PR13390(i1 %bool, i8* %a) { 224 entry: 225 %cond = or i1 %bool, true 226 br i1 %cond, label %return, label %xpto 227 228 xpto: 229 %select = select i1 %bool, i8* %select, i8* %a 230 %select2 = select i1 %bool, i8* %a, i8* %select2 231 %0 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %select, i1 true) 232 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %select2, i1 true) 233 %2 = add i32 %0, %1 234 ; CHECK: ret i32 undef 235 ret i32 %2 236 237 return: 238 ret i32 42 239 } 240 241 ; CHECK-LABEL: @PR13621( 242 define i32 @PR13621(i1 %bool) nounwind { 243 entry: 244 %cond = or i1 %bool, true 245 br i1 %cond, label %return, label %xpto 246 247 ; technically reachable, but this malformed IR may appear as a result of constant propagation 248 xpto: 249 %gep2 = getelementptr i8* %gep, i32 1 250 %gep = getelementptr i8* %gep2, i32 1 251 %o = call i32 @llvm.objectsize.i32.p0i8(i8* %gep, i1 true) 252 ; CHECK: ret i32 undef 253 ret i32 %o 254 255 return: 256 ret i32 7 257 } 258 259 @globalalias = alias internal [60 x i8]* @a 260 261 ; CHECK-LABEL: @test18( 262 ; CHECK-NEXT: ret i32 60 263 define i32 @test18() { 264 %bc = bitcast [60 x i8]* @globalalias to i8* 265 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* %bc, i1 false) 266 ret i32 %1 267 } 268 269 @globalalias2 = alias weak [60 x i8]* @a 270 271 ; CHECK-LABEL: @test19( 272 ; CHECK: llvm.objectsize 273 define i32 @test19() { 274 %bc = bitcast [60 x i8]* @globalalias2 to i8* 275 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* %bc, i1 false) 276 ret i32 %1 277 } 278 279
