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. 4target 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]*> 8define 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], [60 x i8]* @a, i32 0, i32 0), i1 false, i1 false) 12 ret i32 %1 13} 14 15define i8* @bar() nounwind { 16; CHECK-LABEL: @bar( 17entry: 18 %retval = alloca i8* 19 %0 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i1 false, 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 24cond.true: 25 %1 = load i8*, i8** %retval 26 ret i8* %1 27 28cond.false: 29 %2 = load i8*, i8** %retval 30 ret i8* %2 31} 32 33define 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], [60 x i8]* @a, i32 1, i32 0), i1 false, i1 false) 37 ret i32 %1 38} 39 40@window = external global [0 x i8] 41 42define 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], [0 x i8]* @window, i32 0, i32 0), i1 false, i1 false) 46 %2 = icmp eq i32 %1, -1 47 ret i1 %2 48} 49 50define void @test1(i8* %q, i32 %x) nounwind noinline { 51; CHECK-LABEL: @test1( 52; CHECK: objectsize.i32.p0i8 53entry: 54 %0 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([0 x i8], [0 x i8]* @window, i32 0, i32 10), i1 false, 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 67define i32 @test2() nounwind { 68; CHECK-LABEL: @test2( 69; CHECK-NEXT: ret i32 34 70 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr (i8, i8* bitcast ([9 x i32]* @.str5 to i8*), i32 2), i1 false, 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 77declare i8* @__memcpy_chk(i8*, i8*, i32, i32) nounwind 78 79declare i32 @llvm.objectsize.i32.p0i8(i8*, i1, i1) nounwind readonly 80 81declare i32 @llvm.objectsize.i32.p1i8(i8 addrspace(1)*, i1, i1) nounwind readonly 82 83declare i8* @__inline_memcpy_chk(i8*, i8*, i32) nounwind inlinehint 84 85define void @test3() nounwind { 86; CHECK-LABEL: @test3( 87entry: 88 br i1 undef, label %bb11, label %bb12 89 90bb11: 91 %0 = getelementptr inbounds float, float* getelementptr inbounds ([480 x float], [480 x float]* @array, i32 0, i32 128), i32 -127 ; <float*> [#uses=1] 92 %1 = bitcast float* %0 to i8* ; <i8*> [#uses=1] 93 %2 = call i32 @llvm.objectsize.i32.p0i8(i8* %1, i1 false, i1 false) ; <i32> [#uses=1] 94 %3 = call i8* @__memcpy_chk(i8* undef, i8* undef, i32 512, i32 %2) nounwind ; <i8*> [#uses=0] 95; CHECK: unreachable 96 unreachable 97 98bb12: 99 %4 = getelementptr inbounds float, float* getelementptr inbounds ([480 x float], [480 x float]* @array, i32 0, i32 128), i32 -127 ; <float*> [#uses=1] 100 %5 = bitcast float* %4 to i8* ; <i8*> [#uses=1] 101 %6 = call i8* @__inline_memcpy_chk(i8* %5, i8* undef, i32 512) nounwind inlinehint ; <i8*> [#uses=0] 102; CHECK: @__inline_memcpy_chk 103 unreachable 104} 105 106; rdar://7718857 107 108%struct.data = type { [100 x i32], [100 x i32], [1024 x i8] } 109 110define i32 @test4(i8** %esc) nounwind ssp { 111; CHECK-LABEL: @test4( 112entry: 113 %0 = alloca %struct.data, align 8 114 %1 = bitcast %struct.data* %0 to i8* 115 %2 = call i32 @llvm.objectsize.i32.p0i8(i8* %1, i1 false, i1 false) nounwind 116; CHECK-NOT: @llvm.objectsize 117; CHECK: @llvm.memset.p0i8.i32(i8* align 8 %1, i8 0, i32 1824, i1 false) 118 %3 = call i8* @__memset_chk(i8* %1, i32 0, i32 1824, i32 %2) nounwind 119 store i8* %1, i8** %esc 120 ret i32 0 121} 122 123; rdar://7782496 124@s = external global i8* 125 126define i8* @test5(i32 %n) nounwind ssp { 127; CHECK-LABEL: @test5( 128entry: 129 %0 = tail call noalias i8* @malloc(i32 20) nounwind 130 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %0, i1 false, i1 false) 131 %2 = load i8*, i8** @s, align 8 132; CHECK-NOT: @llvm.objectsize 133; CHECK: @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 %0, i8* align 1 %1, i32 10, i1 false) 134 %3 = tail call i8* @__memcpy_chk(i8* %0, i8* %2, i32 10, i32 %1) nounwind 135 ret i8* %0 136} 137 138define void @test6(i32 %n) nounwind ssp { 139; CHECK-LABEL: @test6( 140entry: 141 %0 = tail call noalias i8* @malloc(i32 20) nounwind 142 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %0, i1 false, i1 false) 143 %2 = load i8*, i8** @s, align 8 144; CHECK-NOT: @llvm.objectsize 145; CHECK: @__memcpy_chk(i8* %0, i8* %1, i32 30, i32 20) 146 %3 = tail call i8* @__memcpy_chk(i8* %0, i8* %2, i32 30, i32 %1) nounwind 147 ret void 148} 149 150declare i8* @__memset_chk(i8*, i32, i32, i32) nounwind 151 152declare noalias i8* @malloc(i32) nounwind 153 154define i32 @test7(i8** %esc) { 155; CHECK-LABEL: @test7( 156 %alloc = call noalias i8* @malloc(i32 48) nounwind 157 store i8* %alloc, i8** %esc 158 %gep = getelementptr inbounds i8, i8* %alloc, i32 16 159 %objsize = call i32 @llvm.objectsize.i32.p0i8(i8* %gep, i1 false, i1 false) nounwind readonly 160; CHECK: ret i32 32 161 ret i32 %objsize 162} 163 164declare noalias i8* @calloc(i32, i32) nounwind 165 166define i32 @test8(i8** %esc) { 167; CHECK-LABEL: @test8( 168 %alloc = call noalias i8* @calloc(i32 5, i32 7) nounwind 169 store i8* %alloc, i8** %esc 170 %gep = getelementptr inbounds i8, i8* %alloc, i32 5 171 %objsize = call i32 @llvm.objectsize.i32.p0i8(i8* %gep, i1 false, i1 false) nounwind readonly 172; CHECK: ret i32 30 173 ret i32 %objsize 174} 175 176declare noalias i8* @strdup(i8* nocapture) nounwind 177declare noalias i8* @strndup(i8* nocapture, i32) nounwind 178 179; CHECK-LABEL: @test9( 180define i32 @test9(i8** %esc) { 181 %call = tail call i8* @strdup(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0)) nounwind 182 store i8* %call, i8** %esc, align 8 183 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true, i1 false) 184; CHECK: ret i32 8 185 ret i32 %1 186} 187 188; CHECK-LABEL: @test10( 189define i32 @test10(i8** %esc) { 190 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 3) nounwind 191 store i8* %call, i8** %esc, align 8 192 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true, i1 false) 193; CHECK: ret i32 4 194 ret i32 %1 195} 196 197; CHECK-LABEL: @test11( 198define i32 @test11(i8** %esc) { 199 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 7) nounwind 200 store i8* %call, i8** %esc, align 8 201 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true, i1 false) 202; CHECK: ret i32 8 203 ret i32 %1 204} 205 206; CHECK-LABEL: @test12( 207define i32 @test12(i8** %esc) { 208 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 8) nounwind 209 store i8* %call, i8** %esc, align 8 210 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true, i1 false) 211; CHECK: ret i32 8 212 ret i32 %1 213} 214 215; CHECK-LABEL: @test13( 216define i32 @test13(i8** %esc) { 217 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 57) nounwind 218 store i8* %call, i8** %esc, align 8 219 %1 = tail call i32 @llvm.objectsize.i32.p0i8(i8* %call, i1 true, i1 false) 220; CHECK: ret i32 8 221 ret i32 %1 222} 223 224@globalalias = internal alias [60 x i8], [60 x i8]* @a 225 226; CHECK-LABEL: @test18( 227; CHECK-NEXT: ret i32 60 228define i32 @test18() { 229 %bc = bitcast [60 x i8]* @globalalias to i8* 230 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* %bc, i1 false, i1 false) 231 ret i32 %1 232} 233 234@globalalias2 = weak alias [60 x i8], [60 x i8]* @a 235 236; CHECK-LABEL: @test19( 237; CHECK: llvm.objectsize 238define i32 @test19() { 239 %bc = bitcast [60 x i8]* @globalalias2 to i8* 240 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* %bc, i1 false, i1 false) 241 ret i32 %1 242} 243 244; CHECK-LABEL: @test20( 245; CHECK: ret i32 0 246define i32 @test20() { 247 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* null, i1 false, i1 false) 248 ret i32 %1 249} 250 251; CHECK-LABEL: @test21( 252; CHECK: ret i32 0 253define i32 @test21() { 254 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* null, i1 true, i1 false) 255 ret i32 %1 256} 257 258; CHECK-LABEL: @test22( 259; CHECK: llvm.objectsize 260define i32 @test22() { 261 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* null, i1 false, i1 true) 262 ret i32 %1 263} 264 265; CHECK-LABEL: @test23( 266; CHECK: llvm.objectsize 267define i32 @test23() { 268 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* null, i1 true, i1 true) 269 ret i32 %1 270} 271 272; 1 is an arbitrary non-zero address space. 273; CHECK-LABEL: @test24( 274; CHECK: llvm.objectsize 275define i32 @test24() { 276 %1 = call i32 @llvm.objectsize.i32.p1i8(i8 addrspace(1)* null, i1 false, 277 i1 false) 278 ret i32 %1 279} 280 281; CHECK-LABEL: @test25( 282; CHECK: llvm.objectsize 283define i32 @test25() { 284 %1 = call i32 @llvm.objectsize.i32.p1i8(i8 addrspace(1)* null, i1 true, 285 i1 false) 286 ret i32 %1 287} 288 289; CHECK-LABEL: @test26( 290; CHECK: llvm.objectsize 291define i32 @test26() { 292 %1 = call i32 @llvm.objectsize.i32.p1i8(i8 addrspace(1)* null, i1 false, 293 i1 true) 294 ret i32 %1 295} 296 297; CHECK-LABEL: @test27( 298; CHECK: llvm.objectsize 299define i32 @test27() { 300 %1 = call i32 @llvm.objectsize.i32.p1i8(i8 addrspace(1)* null, i1 true, 301 i1 true) 302 ret i32 %1 303} 304