1 ; RUN: opt < %s -msan -S | FileCheck %s
2 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
4 ; Check the presence of __msan_init
5 ; CHECK: @llvm.global_ctors {{.*}} @__msan_init
7 ; Check the presence and the linkage type of __msan_track_origins
8 ; CHECK: @__msan_track_origins = weak_odr constant i32 0
10 ; load followed by cmp: check that we load the shadow and call __msan_warning.
11 define void @LoadAndCmp(i32* nocapture %a) nounwind uwtable {
13 %0 = load i32* %a, align 4
14 %tobool = icmp eq i32 %0, 0
15 br i1 %tobool, label %if.end, label %if.then
17 if.then: ; preds = %entry
18 tail call void (...)* @foo() nounwind
21 if.end: ; preds = %entry, %if.then
25 declare void @foo(...)
30 ; CHECK: call void @__msan_warning_noreturn()
31 ; CHECK-NEXT: call void asm sideeffect
32 ; CHECK-NEXT: unreachable
35 ; Check that we store the shadow for the retval.
36 define i32 @ReturnInt() nounwind uwtable readnone {
42 ; CHECK: store i32 0,{{.*}}__msan_retval_tls
45 ; Check that we get the shadow for the retval.
46 define void @CopyRetVal(i32* nocapture %a) nounwind uwtable {
48 %call = tail call i32 @ReturnInt() nounwind
49 store i32 %call, i32* %a, align 4
54 ; CHECK: load{{.*}}__msan_retval_tls
60 ; Check that we generate PHIs for shadow.
61 define void @FuncWithPhi(i32* nocapture %a, i32* %b, i32* nocapture %c) nounwind uwtable {
63 %tobool = icmp eq i32* %b, null
64 br i1 %tobool, label %if.else, label %if.then
66 if.then: ; preds = %entry
67 %0 = load i32* %b, align 4
70 if.else: ; preds = %entry
71 %1 = load i32* %c, align 4
74 if.end: ; preds = %if.else, %if.then
75 %t.0 = phi i32 [ %0, %if.then ], [ %1, %if.else ]
76 store i32 %t.0, i32* %a, align 4
87 ; Compute shadow for "x << 10"
88 define void @ShlConst(i32* nocapture %x) nounwind uwtable {
90 %0 = load i32* %x, align 4
92 store i32 %1, i32* %x, align 4
105 ; Compute shadow for "10 << x": it should have 'sext i1'.
106 define void @ShlNonConst(i32* nocapture %x) nounwind uwtable {
108 %0 = load i32* %x, align 4
110 store i32 %1, i32* %x, align 4
114 ; CHECK: @ShlNonConst
123 define void @SExt(i32* nocapture %a, i16* nocapture %b) nounwind uwtable {
125 %0 = load i16* %b, align 2
126 %1 = sext i16 %0 to i32
127 store i32 %1, i32* %a, align 4
142 define void @MemSet(i8* nocapture %x) nounwind uwtable {
144 call void @llvm.memset.p0i8.i64(i8* %x, i8 42, i64 10, i32 1, i1 false)
148 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
151 ; CHECK: call i8* @__msan_memset
156 define void @MemCpy(i8* nocapture %x, i8* nocapture %y) nounwind uwtable {
158 call void @llvm.memcpy.p0i8.p0i8.i64(i8* %x, i8* %y, i64 10, i32 1, i1 false)
162 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
165 ; CHECK: call i8* @__msan_memcpy
169 ; memmove is lowered to a call
170 define void @MemMove(i8* nocapture %x, i8* nocapture %y) nounwind uwtable {
172 call void @llvm.memmove.p0i8.p0i8.i64(i8* %x, i8* %y, i64 10, i32 1, i1 false)
176 declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
179 ; CHECK: call i8* @__msan_memmove
183 ; Check that we propagate shadow for "select"
185 define i32 @Select(i32 %a, i32 %b, i32 %c) nounwind uwtable readnone {
187 %tobool = icmp ne i32 %c, 0
188 %cond = select i1 %tobool, i32 %a, i32 %b
198 define i8* @IntToPtr(i64 %x) nounwind uwtable readnone {
200 %0 = inttoptr i64 %x to i8*
205 ; CHECK: load i64*{{.*}}__msan_param_tls
206 ; CHECK-NEXT: inttoptr
207 ; CHECK-NEXT: store i64{{.*}}__msan_retval_tls
211 define i8* @IntToPtr_ZExt(i16 %x) nounwind uwtable readnone {
213 %0 = inttoptr i16 %x to i8*
217 ; CHECK: @IntToPtr_ZExt
219 ; CHECK-NEXT: inttoptr
223 ; Check that we insert exactly one check on udiv
224 ; (2nd arg shadow is checked, 1st arg shadow is propagated)
226 define i32 @Div(i32 %a, i32 %b) nounwind uwtable readnone {
228 %div = udiv i32 %a, %b
234 ; CHECK: call void @__msan_warning
241 ; Check that we propagate shadow for x<0, x>=0, etc (i.e. sign bit tests)
243 define zeroext i1 @ICmpSLT(i32 %x) nounwind uwtable readnone {
244 %1 = icmp slt i32 %x, 0
250 ; CHECK-NOT: call void @__msan_warning
252 ; CHECK-NOT: call void @__msan_warning
255 define zeroext i1 @ICmpSGE(i32 %x) nounwind uwtable readnone {
256 %1 = icmp sge i32 %x, 0
262 ; CHECK-NOT: call void @__msan_warning
264 ; CHECK-NOT: call void @__msan_warning
267 define zeroext i1 @ICmpSGT(i32 %x) nounwind uwtable readnone {
268 %1 = icmp sgt i32 0, %x
274 ; CHECK-NOT: call void @__msan_warning
276 ; CHECK-NOT: call void @__msan_warning
279 define zeroext i1 @ICmpSLE(i32 %x) nounwind uwtable readnone {
280 %1 = icmp sle i32 0, %x
286 ; CHECK-NOT: call void @__msan_warning
288 ; CHECK-NOT: call void @__msan_warning
292 ; Check that loads from shadow have the same aligment as the original loads.
294 define i32 @ShadowLoadAlignmentLarge() nounwind uwtable {
295 %y = alloca i32, align 64
296 %1 = load volatile i32* %y, align 64
300 ; CHECK: @ShadowLoadAlignmentLarge
301 ; CHECK: load i32* {{.*}} align 64
302 ; CHECK: load volatile i32* {{.*}} align 64
305 define i32 @ShadowLoadAlignmentSmall() nounwind uwtable {
306 %y = alloca i32, align 2
307 %1 = load volatile i32* %y, align 2
311 ; CHECK: @ShadowLoadAlignmentSmall
312 ; CHECK: load i32* {{.*}} align 2
313 ; CHECK: load volatile i32* {{.*}} align 2
317 ; Test vector manipulation instructions.
318 ; Check that the same bit manipulation is applied to the shadow values.
319 ; Check that there is a zero test of the shadow of %idx argument, where present.
321 define i32 @ExtractElement(<4 x i32> %vec, i32 %idx) {
322 %x = extractelement <4 x i32> %vec, i32 %idx
326 ; CHECK: @ExtractElement
327 ; CHECK: extractelement
328 ; CHECK: call void @__msan_warning
329 ; CHECK: extractelement
332 define <4 x i32> @InsertElement(<4 x i32> %vec, i32 %idx, i32 %x) {
333 %vec1 = insertelement <4 x i32> %vec, i32 %x, i32 %idx
337 ; CHECK: @InsertElement
338 ; CHECK: insertelement
339 ; CHECK: call void @__msan_warning
340 ; CHECK: insertelement
341 ; CHECK: ret <4 x i32>
343 define <4 x i32> @ShuffleVector(<4 x i32> %vec, <4 x i32> %vec1) {
344 %vec2 = shufflevector <4 x i32> %vec, <4 x i32> %vec1,
345 <4 x i32> <i32 0, i32 4, i32 1, i32 5>
349 ; CHECK: @ShuffleVector
350 ; CHECK: shufflevector
351 ; CHECK-NOT: call void @__msan_warning
352 ; CHECK: shufflevector
353 ; CHECK: ret <4 x i32>
355 ; Test bswap intrinsic instrumentation
356 define i32 @BSwap(i32 %x) nounwind uwtable readnone {
357 %y = tail call i32 @llvm.bswap.i32(i32 %x)
361 declare i32 @llvm.bswap.i32(i32) nounwind readnone
364 ; CHECK-NOT: call void @__msan_warning
365 ; CHECK: @llvm.bswap.i32
366 ; CHECK-NOT: call void @__msan_warning
367 ; CHECK: @llvm.bswap.i32
368 ; CHECK-NOT: call void @__msan_warning