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"
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 {
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)
15 define i8* @bar() nounwind {
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
22 br i1 %cmp, label %cond.true, label %cond.false
25 %1 = load i8** %retval
29 %2 = load i8** %retval
33 define i32 @f() nounwind {
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)
40 @window = external global [0 x i8]
42 define i1 @baz() nounwind {
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
50 define void @test1(i8* %q, i32 %x) nounwind noinline {
51 ; CHECK-LABEL: @test1(
52 ; CHECK: objectsize.i32.p0i8
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"
58 "46": ; preds = %entry
61 "47": ; preds = %entry
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)
75 @array = internal global [480 x float] zeroinitializer ; <[480 x float]*> [#uses=1]
77 declare i8* @__memcpy_chk(i8*, i8*, i32, i32) nounwind
79 declare i32 @llvm.objectsize.i32.p0i8(i8*, i1) nounwind readonly
81 declare i8* @__inline_memcpy_chk(i8*, i8*, i32) nounwind inlinehint
83 define void @test3() nounwind {
84 ; CHECK-LABEL: @test3(
86 br i1 undef, label %bb11, label %bb12
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]
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
106 %struct.data = type { [100 x i32], [100 x i32], [1024 x i8] }
108 define i32 @test4(i8** %esc) nounwind ssp {
109 ; CHECK-LABEL: @test4(
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
122 @s = external global i8*
124 define i8* @test5(i32 %n) nounwind ssp {
125 ; CHECK-LABEL: @test5(
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
136 define void @test6(i32 %n) nounwind ssp {
137 ; CHECK-LABEL: @test6(
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
148 declare i8* @__memset_chk(i8*, i32, i32, i32) nounwind
150 declare noalias i8* @malloc(i32) nounwind
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
162 declare noalias i8* @calloc(i32, i32) nounwind
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
174 declare noalias i8* @strdup(i8* nocapture) nounwind
175 declare noalias i8* @strndup(i8* nocapture, i32) nounwind
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)
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)
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)
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)
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)
222 ; CHECK-LABEL: @PR13390(
223 define i32 @PR13390(i1 %bool, i8* %a) {
225 %cond = or i1 %bool, true
226 br i1 %cond, label %return, label %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)
234 ; CHECK: ret i32 undef
241 ; CHECK-LABEL: @PR13621(
242 define i32 @PR13621(i1 %bool) nounwind {
244 %cond = or i1 %bool, true
245 br i1 %cond, label %return, label %xpto
247 ; technically reachable, but this malformed IR may appear as a result of constant propagation
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
259 @globalalias = internal alias [60 x i8]* @a
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)
269 @globalalias2 = weak alias [60 x i8]* @a
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)