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]*>
9 define i32 @foo() nounwind {
11 ; CHECK-NEXT: ret i32 60
12 %1 = call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false)
16 define i8* @bar() nounwind {
20 %0 = call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 0), i1 false)
21 %cmp = icmp ne i32 %0, -1
23 br i1 %cmp, label %cond.true, label %cond.false
26 %1 = load i8** %retval
30 %2 = load i8** %retval
34 define i32 @f() nounwind {
36 ; CHECK-NEXT: ret i32 0
37 %1 = call i32 @llvm.objectsize.i32(i8* getelementptr ([60 x i8]* @a, i32 1, i32 0), i1 false)
41 @window = external global [0 x i8]
43 define i1 @baz() nounwind {
45 ; CHECK-NEXT: objectsize
46 %1 = tail call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([0 x i8]* @window, i32 0, i32 0), i1 false)
47 %2 = icmp eq i32 %1, -1
51 define void @test1(i8* %q, i32 %x) nounwind noinline {
53 ; CHECK: objectsize.i32
55 %0 = call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([0 x i8]* @window, i32 0, i32 10), i1 false) ; <i64> [#uses=1]
56 %1 = icmp eq i32 %0, -1 ; <i1> [#uses=1]
57 br i1 %1, label %"47", label %"46"
59 "46": ; preds = %entry
62 "47": ; preds = %entry
66 @.str5 = private constant [9 x i32] [i32 97, i32 98, i32 99, i32 100, i32 0, i32
67 101, i32 102, i32 103, i32 0], align 4
68 define i32 @test2() nounwind {
70 ; CHECK-NEXT: ret i32 34
71 %1 = call i32 @llvm.objectsize.i32(i8* getelementptr (i8* bitcast ([9 x i32]* @.str5 to i8*), i32 2), i1 false)
76 @array = internal global [480 x float] zeroinitializer ; <[480 x float]*> [#uses=1]
78 declare i8* @__memcpy_chk(i8*, i8*, i32, i32) nounwind
80 declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly
82 declare i8* @__inline_memcpy_chk(i8*, i8*, i32) nounwind inlinehint
84 define void @test3() nounwind {
87 br i1 undef, label %bb11, label %bb12
90 %0 = getelementptr inbounds float* getelementptr inbounds ([480 x float]* @array, i32 0, i32 128), i32 -127 ; <float*> [#uses=1]
91 %1 = bitcast float* %0 to i8* ; <i8*> [#uses=1]
92 %2 = call i32 @llvm.objectsize.i32(i8* %1, i1 false) ; <i32> [#uses=1]
93 %3 = call i8* @__memcpy_chk(i8* undef, i8* undef, i32 512, i32 %2) nounwind ; <i8*> [#uses=0]
98 %4 = getelementptr inbounds float* getelementptr inbounds ([480 x float]* @array, i32 0, i32 128), i32 -127 ; <float*> [#uses=1]
99 %5 = bitcast float* %4 to i8* ; <i8*> [#uses=1]
100 %6 = call i8* @__inline_memcpy_chk(i8* %5, i8* undef, i32 512) nounwind inlinehint ; <i8*> [#uses=0]
101 ; CHECK: @__inline_memcpy_chk
107 %struct.data = type { [100 x i32], [100 x i32], [1024 x i8] }
109 define i32 @test4(i8** %esc) nounwind ssp {
112 %0 = alloca %struct.data, align 8
113 %1 = bitcast %struct.data* %0 to i8*
114 %2 = call i32 @llvm.objectsize.i32(i8* %1, i1 false) nounwind
115 ; CHECK-NOT: @llvm.objectsize
116 ; CHECK: @llvm.memset.p0i8.i32(i8* %1, i8 0, i32 1824, i32 8, i1 false)
117 %3 = call i8* @__memset_chk(i8* %1, i32 0, i32 1824, i32 %2) nounwind
118 store i8* %1, i8** %esc
123 @s = external global i8*
125 define i8* @test5(i32 %n) nounwind ssp {
128 %0 = tail call noalias i8* @malloc(i32 20) nounwind
129 %1 = tail call i32 @llvm.objectsize.i32(i8* %0, i1 false)
130 %2 = load i8** @s, align 8
131 ; CHECK-NOT: @llvm.objectsize
132 ; CHECK: @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* %1, i32 10, i32 1, i1 false)
133 %3 = tail call i8* @__memcpy_chk(i8* %0, i8* %2, i32 10, i32 %1) nounwind
137 define void @test6(i32 %n) nounwind ssp {
140 %0 = tail call noalias i8* @malloc(i32 20) nounwind
141 %1 = tail call i32 @llvm.objectsize.i32(i8* %0, i1 false)
142 %2 = load i8** @s, align 8
143 ; CHECK-NOT: @llvm.objectsize
144 ; CHECK: @__memcpy_chk(i8* %0, i8* %1, i32 30, i32 20)
145 %3 = tail call i8* @__memcpy_chk(i8* %0, i8* %2, i32 30, i32 %1) nounwind
149 declare i8* @__memset_chk(i8*, i32, i32, i32) nounwind
151 declare noalias i8* @malloc(i32) nounwind
153 define i32 @test7(i8** %esc) {
155 %alloc = call noalias i8* @malloc(i32 48) nounwind
156 store i8* %alloc, i8** %esc
157 %gep = getelementptr inbounds i8* %alloc, i32 16
158 %objsize = call i32 @llvm.objectsize.i32(i8* %gep, i1 false) nounwind readonly
163 declare noalias i8* @calloc(i32, i32) nounwind
165 define i32 @test8(i8** %esc) {
167 %alloc = call noalias i8* @calloc(i32 5, i32 7) nounwind
168 store i8* %alloc, i8** %esc
169 %gep = getelementptr inbounds i8* %alloc, i32 5
170 %objsize = call i32 @llvm.objectsize.i32(i8* %gep, i1 false) nounwind readonly
175 declare noalias i8* @strdup(i8* nocapture) nounwind
176 declare noalias i8* @strndup(i8* nocapture, i32) nounwind
179 define i32 @test9(i8** %esc) {
180 %call = tail call i8* @strdup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0)) nounwind
181 store i8* %call, i8** %esc, align 8
182 %1 = tail call i32 @llvm.objectsize.i32(i8* %call, i1 true)
188 define i32 @test10(i8** %esc) {
189 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 3) nounwind
190 store i8* %call, i8** %esc, align 8
191 %1 = tail call i32 @llvm.objectsize.i32(i8* %call, i1 true)
197 define i32 @test11(i8** %esc) {
198 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 7) nounwind
199 store i8* %call, i8** %esc, align 8
200 %1 = tail call i32 @llvm.objectsize.i32(i8* %call, i1 true)
206 define i32 @test12(i8** %esc) {
207 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 8) nounwind
208 store i8* %call, i8** %esc, align 8
209 %1 = tail call i32 @llvm.objectsize.i32(i8* %call, i1 true)
215 define i32 @test13(i8** %esc) {
216 %call = tail call i8* @strndup(i8* getelementptr inbounds ([8 x i8]* @.str, i64 0, i64 0), i32 57) nounwind
217 store i8* %call, i8** %esc, align 8
218 %1 = tail call i32 @llvm.objectsize.i32(i8* %call, i1 true)
224 define i32 @PR13390(i1 %bool, i8* %a) {
226 %cond = or i1 %bool, true
227 br i1 %cond, label %return, label %xpto
230 %select = select i1 %bool, i8* %select, i8* %a
231 %select2 = select i1 %bool, i8* %a, i8* %select2
232 %0 = tail call i32 @llvm.objectsize.i32(i8* %select, i1 true)
233 %1 = tail call i32 @llvm.objectsize.i32(i8* %select2, i1 true)
235 ; CHECK: ret i32 undef
243 define i32 @PR13621(i1 %bool) nounwind {
245 %cond = or i1 %bool, true
246 br i1 %cond, label %return, label %xpto
248 ; technically reachable, but this malformed IR may appear as a result of constant propagation
250 %gep2 = getelementptr i8* %gep, i32 1
251 %gep = getelementptr i8* %gep2, i32 1
252 %o = call i32 @llvm.objectsize.i32(i8* %gep, i1 true)
253 ; CHECK: ret i32 undef
260 declare noalias i8* @valloc(i32) nounwind
264 define i32 @test14(i32 %a) nounwind {
265 switch i32 %a, label %sw.default [
271 %call = tail call noalias i8* @malloc(i32 6) nounwind
275 %call2 = tail call noalias i8* @calloc(i32 3, i32 2) nounwind
279 %call3 = tail call noalias i8* @valloc(i32 6) nounwind
283 %b.0 = phi i8* [ %call3, %sw.default ], [ %call2, %sw.bb1 ], [ %call, %sw.bb ]
284 %1 = tail call i32 @llvm.objectsize.i32(i8* %b.0, i1 false)
289 ; CHECK: llvm.objectsize
290 define i32 @test15(i32 %a) nounwind {
291 switch i32 %a, label %sw.default [
297 %call = tail call noalias i8* @malloc(i32 3) nounwind
301 %call2 = tail call noalias i8* @calloc(i32 2, i32 1) nounwind
305 %call3 = tail call noalias i8* @valloc(i32 3) nounwind
309 %b.0 = phi i8* [ %call3, %sw.default ], [ %call2, %sw.bb1 ], [ %call, %sw.bb ]
310 %1 = tail call i32 @llvm.objectsize.i32(i8* %b.0, i1 false)