1 ; RUN: opt < %s -msan -msan-check-access-address=0 -S | FileCheck %s
2 ; RUN: opt < %s -msan -msan-check-access-address=0 -msan-track-origins=1 -S | FileCheck -check-prefix=CHECK-ORIGINS %s
3 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"
5 ; Check the presence of __msan_init
6 ; CHECK: @llvm.global_ctors {{.*}} @__msan_init
8 ; Check the presence and the linkage type of __msan_track_origins and
9 ; other interface symbols.
10 ; CHECK: @__msan_track_origins = weak_odr constant i32 0
11 ; CHECK: @__msan_keep_going = weak_odr constant i32 0
12 ; CHECK: @__msan_retval_tls = external thread_local(initialexec) global [{{.*}}]
13 ; CHECK: @__msan_retval_origin_tls = external thread_local(initialexec) global i32
14 ; CHECK: @__msan_param_tls = external thread_local(initialexec) global [{{.*}}]
15 ; CHECK: @__msan_param_origin_tls = external thread_local(initialexec) global [{{.*}}]
16 ; CHECK: @__msan_va_arg_tls = external thread_local(initialexec) global [{{.*}}]
17 ; CHECK: @__msan_va_arg_overflow_size_tls = external thread_local(initialexec) global i64
18 ; CHECK: @__msan_origin_tls = external thread_local(initialexec) global i32
21 ; Check instrumentation of stores
23 define void @Store(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory {
25 store i32 %x, i32* %p, align 4
30 ; CHECK: load {{.*}} @__msan_param_tls
34 ; CHECK-ORIGINS: @Store
35 ; CHECK-ORIGINS: load {{.*}} @__msan_param_tls
36 ; CHECK-ORIGINS: store
38 ; CHECK-ORIGINS: br i1
39 ; CHECK-ORIGINS: <label>
40 ; CHECK-ORIGINS: store
41 ; CHECK-ORIGINS: br label
42 ; CHECK-ORIGINS: <label>
43 ; CHECK-ORIGINS: store
44 ; CHECK-ORIGINS: ret void
47 ; Check instrumentation of aligned stores
48 ; Shadow store has the same alignment as the original store; origin store
49 ; does not specify explicit alignment.
51 define void @AlignedStore(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory {
53 store i32 %x, i32* %p, align 32
57 ; CHECK: @AlignedStore
58 ; CHECK: load {{.*}} @__msan_param_tls
59 ; CHECK: store {{.*}} align 32
60 ; CHECK: store {{.*}} align 32
62 ; CHECK-ORIGINS: @AlignedStore
63 ; CHECK-ORIGINS: load {{.*}} @__msan_param_tls
64 ; CHECK-ORIGINS: store {{.*}} align 32
66 ; CHECK-ORIGINS: br i1
67 ; CHECK-ORIGINS: <label>
68 ; CHECK-ORIGINS: store {{.*}} align 32
69 ; CHECK-ORIGINS: br label
70 ; CHECK-ORIGINS: <label>
71 ; CHECK-ORIGINS: store {{.*}} align 32
72 ; CHECK-ORIGINS: ret void
75 ; load followed by cmp: check that we load the shadow and call __msan_warning.
76 define void @LoadAndCmp(i32* nocapture %a) nounwind uwtable sanitize_memory {
78 %0 = load i32* %a, align 4
79 %tobool = icmp eq i32 %0, 0
80 br i1 %tobool, label %if.end, label %if.then
82 if.then: ; preds = %entry
83 tail call void (...)* @foo() nounwind
86 if.end: ; preds = %entry, %if.then
90 declare void @foo(...)
95 ; CHECK: call void @__msan_warning_noreturn()
96 ; CHECK-NEXT: call void asm sideeffect
97 ; CHECK-NEXT: unreachable
100 ; Check that we store the shadow for the retval.
101 define i32 @ReturnInt() nounwind uwtable readnone sanitize_memory {
107 ; CHECK: store i32 0,{{.*}}__msan_retval_tls
110 ; Check that we get the shadow for the retval.
111 define void @CopyRetVal(i32* nocapture %a) nounwind uwtable sanitize_memory {
113 %call = tail call i32 @ReturnInt() nounwind
114 store i32 %call, i32* %a, align 4
119 ; CHECK: load{{.*}}__msan_retval_tls
125 ; Check that we generate PHIs for shadow.
126 define void @FuncWithPhi(i32* nocapture %a, i32* %b, i32* nocapture %c) nounwind uwtable sanitize_memory {
128 %tobool = icmp eq i32* %b, null
129 br i1 %tobool, label %if.else, label %if.then
131 if.then: ; preds = %entry
132 %0 = load i32* %b, align 4
135 if.else: ; preds = %entry
136 %1 = load i32* %c, align 4
139 if.end: ; preds = %if.else, %if.then
140 %t.0 = phi i32 [ %0, %if.then ], [ %1, %if.else ]
141 store i32 %t.0, i32* %a, align 4
145 ; CHECK: @FuncWithPhi
152 ; Compute shadow for "x << 10"
153 define void @ShlConst(i32* nocapture %x) nounwind uwtable sanitize_memory {
155 %0 = load i32* %x, align 4
157 store i32 %1, i32* %x, align 4
170 ; Compute shadow for "10 << x": it should have 'sext i1'.
171 define void @ShlNonConst(i32* nocapture %x) nounwind uwtable sanitize_memory {
173 %0 = load i32* %x, align 4
175 store i32 %1, i32* %x, align 4
179 ; CHECK: @ShlNonConst
188 define void @SExt(i32* nocapture %a, i16* nocapture %b) nounwind uwtable sanitize_memory {
190 %0 = load i16* %b, align 2
191 %1 = sext i16 %0 to i32
192 store i32 %1, i32* %a, align 4
207 define void @MemSet(i8* nocapture %x) nounwind uwtable sanitize_memory {
209 call void @llvm.memset.p0i8.i64(i8* %x, i8 42, i64 10, i32 1, i1 false)
213 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
216 ; CHECK: call i8* @__msan_memset
221 define void @MemCpy(i8* nocapture %x, i8* nocapture %y) nounwind uwtable sanitize_memory {
223 call void @llvm.memcpy.p0i8.p0i8.i64(i8* %x, i8* %y, i64 10, i32 1, i1 false)
227 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
230 ; CHECK: call i8* @__msan_memcpy
234 ; memmove is lowered to a call
235 define void @MemMove(i8* nocapture %x, i8* nocapture %y) nounwind uwtable sanitize_memory {
237 call void @llvm.memmove.p0i8.p0i8.i64(i8* %x, i8* %y, i64 10, i32 1, i1 false)
241 declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
244 ; CHECK: call i8* @__msan_memmove
248 ; Check that we propagate shadow for "select"
250 define i32 @Select(i32 %a, i32 %b, i32 %c) nounwind uwtable readnone sanitize_memory {
252 %tobool = icmp ne i32 %c, 0
253 %cond = select i1 %tobool, i32 %a, i32 %b
263 ; Check that we propagate origin for "select" with vector condition.
264 ; Select condition is flattened to i1, which is then used to select one of the
267 define <8 x i16> @SelectVector(<8 x i16> %a, <8 x i16> %b, <8 x i1> %c) nounwind uwtable readnone sanitize_memory {
269 %cond = select <8 x i1> %c, <8 x i16> %a, <8 x i16> %b
273 ; CHECK-ORIGINS: @SelectVector
274 ; CHECK-ORIGINS: bitcast <8 x i1> {{.*}} to i8
275 ; CHECK-ORIGINS: icmp ne i8
276 ; CHECK-ORIGINS: select i1
277 ; CHECK-ORIGINS: ret <8 x i16>
280 define i8* @IntToPtr(i64 %x) nounwind uwtable readnone sanitize_memory {
282 %0 = inttoptr i64 %x to i8*
287 ; CHECK: load i64*{{.*}}__msan_param_tls
288 ; CHECK-NEXT: inttoptr
289 ; CHECK-NEXT: store i64{{.*}}__msan_retval_tls
293 define i8* @IntToPtr_ZExt(i16 %x) nounwind uwtable readnone sanitize_memory {
295 %0 = inttoptr i16 %x to i8*
299 ; CHECK: @IntToPtr_ZExt
301 ; CHECK-NEXT: inttoptr
305 ; Check that we insert exactly one check on udiv
306 ; (2nd arg shadow is checked, 1st arg shadow is propagated)
308 define i32 @Div(i32 %a, i32 %b) nounwind uwtable readnone sanitize_memory {
310 %div = udiv i32 %a, %b
316 ; CHECK: call void @__msan_warning
323 ; Check that we propagate shadow for x<0, x>=0, etc (i.e. sign bit tests)
325 define zeroext i1 @ICmpSLT(i32 %x) nounwind uwtable readnone sanitize_memory {
326 %1 = icmp slt i32 %x, 0
332 ; CHECK-NOT: call void @__msan_warning
334 ; CHECK-NOT: call void @__msan_warning
337 define zeroext i1 @ICmpSGE(i32 %x) nounwind uwtable readnone sanitize_memory {
338 %1 = icmp sge i32 %x, 0
344 ; CHECK-NOT: call void @__msan_warning
346 ; CHECK-NOT: call void @__msan_warning
349 define zeroext i1 @ICmpSGT(i32 %x) nounwind uwtable readnone sanitize_memory {
350 %1 = icmp sgt i32 0, %x
356 ; CHECK-NOT: call void @__msan_warning
358 ; CHECK-NOT: call void @__msan_warning
361 define zeroext i1 @ICmpSLE(i32 %x) nounwind uwtable readnone sanitize_memory {
362 %1 = icmp sle i32 0, %x
368 ; CHECK-NOT: call void @__msan_warning
370 ; CHECK-NOT: call void @__msan_warning
374 ; Check that we propagate shadow for x<0, x>=0, etc (i.e. sign bit tests)
375 ; of the vector arguments.
377 define <2 x i1> @ICmpSLT_vector(<2 x i32*> %x) nounwind uwtable readnone sanitize_memory {
378 %1 = icmp slt <2 x i32*> %x, zeroinitializer
382 ; CHECK: @ICmpSLT_vector
383 ; CHECK: icmp slt <2 x i64>
384 ; CHECK-NOT: call void @__msan_warning
385 ; CHECK: icmp slt <2 x i32*>
386 ; CHECK-NOT: call void @__msan_warning
387 ; CHECK: ret <2 x i1>
390 ; Check that we propagate shadow for unsigned relational comparisons with
393 define zeroext i1 @ICmpUGTConst(i32 %x) nounwind uwtable readnone sanitize_memory {
395 %cmp = icmp ugt i32 %x, 7
399 ; CHECK: @ICmpUGTConst
400 ; CHECK: icmp ugt i32
401 ; CHECK-NOT: call void @__msan_warning
402 ; CHECK: icmp ugt i32
403 ; CHECK-NOT: call void @__msan_warning
404 ; CHECK: icmp ugt i32
405 ; CHECK-NOT: call void @__msan_warning
409 ; Check that loads of shadow have the same aligment as the original loads.
410 ; Check that loads of origin have the aligment of max(4, original alignment).
412 define i32 @ShadowLoadAlignmentLarge() nounwind uwtable sanitize_memory {
413 %y = alloca i32, align 64
414 %1 = load volatile i32* %y, align 64
418 ; CHECK: @ShadowLoadAlignmentLarge
419 ; CHECK: load i32* {{.*}} align 64
420 ; CHECK: load volatile i32* {{.*}} align 64
423 define i32 @ShadowLoadAlignmentSmall() nounwind uwtable sanitize_memory {
424 %y = alloca i32, align 2
425 %1 = load volatile i32* %y, align 2
429 ; CHECK: @ShadowLoadAlignmentSmall
430 ; CHECK: load i32* {{.*}} align 2
431 ; CHECK: load volatile i32* {{.*}} align 2
434 ; CHECK-ORIGINS: @ShadowLoadAlignmentSmall
435 ; CHECK-ORIGINS: load i32* {{.*}} align 2
436 ; CHECK-ORIGINS: load i32* {{.*}} align 4
437 ; CHECK-ORIGINS: load volatile i32* {{.*}} align 2
438 ; CHECK-ORIGINS: ret i32
441 ; Test vector manipulation instructions.
442 ; Check that the same bit manipulation is applied to the shadow values.
443 ; Check that there is a zero test of the shadow of %idx argument, where present.
445 define i32 @ExtractElement(<4 x i32> %vec, i32 %idx) sanitize_memory {
446 %x = extractelement <4 x i32> %vec, i32 %idx
450 ; CHECK: @ExtractElement
451 ; CHECK: extractelement
452 ; CHECK: call void @__msan_warning
453 ; CHECK: extractelement
456 define <4 x i32> @InsertElement(<4 x i32> %vec, i32 %idx, i32 %x) sanitize_memory {
457 %vec1 = insertelement <4 x i32> %vec, i32 %x, i32 %idx
461 ; CHECK: @InsertElement
462 ; CHECK: insertelement
463 ; CHECK: call void @__msan_warning
464 ; CHECK: insertelement
465 ; CHECK: ret <4 x i32>
467 define <4 x i32> @ShuffleVector(<4 x i32> %vec, <4 x i32> %vec1) sanitize_memory {
468 %vec2 = shufflevector <4 x i32> %vec, <4 x i32> %vec1,
469 <4 x i32> <i32 0, i32 4, i32 1, i32 5>
473 ; CHECK: @ShuffleVector
474 ; CHECK: shufflevector
475 ; CHECK-NOT: call void @__msan_warning
476 ; CHECK: shufflevector
477 ; CHECK: ret <4 x i32>
480 ; Test bswap intrinsic instrumentation
481 define i32 @BSwap(i32 %x) nounwind uwtable readnone sanitize_memory {
482 %y = tail call i32 @llvm.bswap.i32(i32 %x)
486 declare i32 @llvm.bswap.i32(i32) nounwind readnone
489 ; CHECK-NOT: call void @__msan_warning
490 ; CHECK: @llvm.bswap.i32
491 ; CHECK-NOT: call void @__msan_warning
492 ; CHECK: @llvm.bswap.i32
493 ; CHECK-NOT: call void @__msan_warning
499 define void @StoreIntrinsic(i8* %p, <4 x float> %x) nounwind uwtable sanitize_memory {
500 call void @llvm.x86.sse.storeu.ps(i8* %p, <4 x float> %x)
504 declare void @llvm.x86.sse.storeu.ps(i8*, <4 x float>) nounwind
506 ; CHECK: @StoreIntrinsic
509 ; CHECK: store <4 x i32> {{.*}} align 1
510 ; CHECK: call void @llvm.x86.sse.storeu.ps
516 define <16 x i8> @LoadIntrinsic(i8* %p) nounwind uwtable sanitize_memory {
517 %call = call <16 x i8> @llvm.x86.sse3.ldu.dq(i8* %p)
521 declare <16 x i8> @llvm.x86.sse3.ldu.dq(i8* %p) nounwind
523 ; CHECK: @LoadIntrinsic
524 ; CHECK: load <16 x i8>* {{.*}} align 1
527 ; CHECK: call <16 x i8> @llvm.x86.sse3.ldu.dq
528 ; CHECK: store <16 x i8> {{.*}} @__msan_retval_tls
529 ; CHECK: ret <16 x i8>
531 ; CHECK-ORIGINS: @LoadIntrinsic
532 ; CHECK-ORIGINS: [[ORIGIN:%[01-9a-z]+]] = load i32* {{.*}}
533 ; CHECK-ORIGINS: call <16 x i8> @llvm.x86.sse3.ldu.dq
534 ; CHECK-ORIGINS: store i32 {{.*}}[[ORIGIN]], i32* @__msan_retval_origin_tls
535 ; CHECK-ORIGINS: ret <16 x i8>
538 ; Simple NoMem intrinsic
539 ; Check that shadow is OR'ed, and origin is Select'ed
540 ; And no shadow checks!
542 define <8 x i16> @Paddsw128(<8 x i16> %a, <8 x i16> %b) nounwind uwtable sanitize_memory {
543 %call = call <8 x i16> @llvm.x86.sse2.padds.w(<8 x i16> %a, <8 x i16> %b)
547 declare <8 x i16> @llvm.x86.sse2.padds.w(<8 x i16> %a, <8 x i16> %b) nounwind
550 ; CHECK-NEXT: load <8 x i16>* {{.*}} @__msan_param_tls
551 ; CHECK-NEXT: load <8 x i16>* {{.*}} @__msan_param_tls
552 ; CHECK-NEXT: = or <8 x i16>
553 ; CHECK-NEXT: call <8 x i16> @llvm.x86.sse2.padds.w
554 ; CHECK-NEXT: store <8 x i16> {{.*}} @__msan_retval_tls
555 ; CHECK-NEXT: ret <8 x i16>
557 ; CHECK-ORIGINS: @Paddsw128
558 ; CHECK-ORIGINS: load i32* {{.*}} @__msan_param_origin_tls
559 ; CHECK-ORIGINS: load i32* {{.*}} @__msan_param_origin_tls
560 ; CHECK-ORIGINS: = bitcast <8 x i16> {{.*}} to i128
561 ; CHECK-ORIGINS-NEXT: = icmp ne i128 {{.*}}, 0
562 ; CHECK-ORIGINS-NEXT: = select i1 {{.*}}, i32 {{.*}}, i32
563 ; CHECK-ORIGINS: call <8 x i16> @llvm.x86.sse2.padds.w
564 ; CHECK-ORIGINS: store i32 {{.*}} @__msan_retval_origin_tls
565 ; CHECK-ORIGINS: ret <8 x i16>
568 ; Test handling of vectors of pointers.
569 ; Check that shadow of such vector is a vector of integers.
571 define <8 x i8*> @VectorOfPointers(<8 x i8*>* %p) nounwind uwtable sanitize_memory {
572 %x = load <8 x i8*>* %p
576 ; CHECK: @VectorOfPointers
577 ; CHECK: load <8 x i64>*
578 ; CHECK: load <8 x i8*>*
579 ; CHECK: store <8 x i64> {{.*}} @__msan_retval_tls
580 ; CHECK: ret <8 x i8*>
582 ; Test handling of va_copy.
584 declare void @llvm.va_copy(i8*, i8*) nounwind
586 define void @VACopy(i8* %p1, i8* %p2) nounwind uwtable sanitize_memory {
587 call void @llvm.va_copy(i8* %p1, i8* %p2) nounwind
592 ; CHECK: call void @llvm.memset.p0i8.i64({{.*}}, i8 0, i64 24, i32 8, i1 false)
596 ; Test handling of volatile stores.
597 ; Check that MemorySanitizer does not add a check of the value being stored.
599 define void @VolatileStore(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory {
601 store volatile i32 %x, i32* %p, align 4
605 ; CHECK: @VolatileStore
606 ; CHECK-NOT: @__msan_warning
610 ; Test that checks are omitted but shadow propagation is kept if
611 ; sanitize_memory attribute is missing.
613 define i32 @NoSanitizeMemory(i32 %x) uwtable {
615 %tobool = icmp eq i32 %x, 0
616 br i1 %tobool, label %if.end, label %if.then
618 if.then: ; preds = %entry
619 tail call void @bar()
622 if.end: ; preds = %entry, %if.then
628 ; CHECK: @NoSanitizeMemory
629 ; CHECK-NOT: @__msan_warning
630 ; CHECK: load i32* {{.*}} @__msan_param_tls
631 ; CHECK-NOT: @__msan_warning
632 ; CHECK: store {{.*}} @__msan_retval_tls
633 ; CHECK-NOT: @__msan_warning