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) 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) 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) 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) 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) ; <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) 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) nounwind readonly 80 81declare i8* @__inline_memcpy_chk(i8*, i8*, i32) nounwind inlinehint 82 83define void @test3() nounwind { 84; CHECK-LABEL: @test3( 85entry: 86 br i1 undef, label %bb11, label %bb12 87 88bb11: 89 %0 = getelementptr inbounds float, float* getelementptr inbounds ([480 x float], [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 96bb12: 97 %4 = getelementptr inbounds float, float* getelementptr inbounds ([480 x float], [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 108define i32 @test4(i8** %esc) nounwind ssp { 109; CHECK-LABEL: @test4( 110entry: 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 124define i8* @test5(i32 %n) nounwind ssp { 125; CHECK-LABEL: @test5( 126entry: 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*, 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 136define void @test6(i32 %n) nounwind ssp { 137; CHECK-LABEL: @test6( 138entry: 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*, 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 148declare i8* @__memset_chk(i8*, i32, i32, i32) nounwind 149 150declare noalias i8* @malloc(i32) nounwind 151 152define 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, 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 162declare noalias i8* @calloc(i32, i32) nounwind 163 164define 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, 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 174declare noalias i8* @strdup(i8* nocapture) nounwind 175declare noalias i8* @strndup(i8* nocapture, i32) nounwind 176 177; CHECK-LABEL: @test9( 178define i32 @test9(i8** %esc) { 179 %call = tail call i8* @strdup(i8* getelementptr inbounds ([8 x i8], [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( 187define i32 @test10(i8** %esc) { 188 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8], [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( 196define i32 @test11(i8** %esc) { 197 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8], [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( 205define i32 @test12(i8** %esc) { 206 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8], [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( 214define i32 @test13(i8** %esc) { 215 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8], [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@globalalias = internal alias [60 x i8], [60 x i8]* @a 223 224; CHECK-LABEL: @test18( 225; CHECK-NEXT: ret i32 60 226define i32 @test18() { 227 %bc = bitcast [60 x i8]* @globalalias to i8* 228 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* %bc, i1 false) 229 ret i32 %1 230} 231 232@globalalias2 = weak alias [60 x i8], [60 x i8]* @a 233 234; CHECK-LABEL: @test19( 235; CHECK: llvm.objectsize 236define i32 @test19() { 237 %bc = bitcast [60 x i8]* @globalalias2 to i8* 238 %1 = call i32 @llvm.objectsize.i32.p0i8(i8* %bc, i1 false) 239 ret i32 %1 240} 241 242