-; RUN: opt < %s -msan -S | FileCheck %s
+; RUN: opt < %s -msan -msan-check-access-address=0 -S | FileCheck %s
+; RUN: opt < %s -msan -msan-check-access-address=0 -msan-track-origins=1 -S | FileCheck -check-prefix=CHECK -check-prefix=CHECK-ORIGINS %s
+
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"
+target triple = "x86_64-unknown-linux-gnu"
; Check the presence of __msan_init
; CHECK: @llvm.global_ctors {{.*}} @__msan_init
+; Check the presence and the linkage type of __msan_track_origins and
+; other interface symbols.
+; CHECK-NOT: @__msan_track_origins
+; CHECK-ORIGINS: @__msan_track_origins = weak_odr constant i32 1
+; CHECK-NOT: @__msan_keep_going = weak_odr constant i32 0
+; CHECK: @__msan_retval_tls = external thread_local(initialexec) global [{{.*}}]
+; CHECK: @__msan_retval_origin_tls = external thread_local(initialexec) global i32
+; CHECK: @__msan_param_tls = external thread_local(initialexec) global [{{.*}}]
+; CHECK: @__msan_param_origin_tls = external thread_local(initialexec) global [{{.*}}]
+; CHECK: @__msan_va_arg_tls = external thread_local(initialexec) global [{{.*}}]
+; CHECK: @__msan_va_arg_overflow_size_tls = external thread_local(initialexec) global i64
+; CHECK: @__msan_origin_tls = external thread_local(initialexec) global i32
+
+
+; Check instrumentation of stores
+
+define void @Store(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory {
+entry:
+ store i32 %x, i32* %p, align 4
+ ret void
+}
+
+; CHECK: @Store
+; CHECK: load {{.*}} @__msan_param_tls
+; CHECK-ORIGINS: load {{.*}} @__msan_param_origin_tls
+; CHECK: store
+; CHECK-ORIGINS: icmp
+; CHECK-ORIGINS: br i1
+; CHECK-ORIGINS: <label>
+; CHECK-ORIGINS: store
+; CHECK-ORIGINS: br label
+; CHECK-ORIGINS: <label>
+; CHECK: store
+; CHECK: ret void
+
+
+; Check instrumentation of aligned stores
+; Shadow store has the same alignment as the original store; origin store
+; does not specify explicit alignment.
+
+define void @AlignedStore(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory {
+entry:
+ store i32 %x, i32* %p, align 32
+ ret void
+}
+
+; CHECK: @AlignedStore
+; CHECK: load {{.*}} @__msan_param_tls
+; CHECK-ORIGINS: load {{.*}} @__msan_param_origin_tls
+; CHECK: store {{.*}} align 32
+; CHECK-ORIGINS: icmp
+; CHECK-ORIGINS: br i1
+; CHECK-ORIGINS: <label>
+; CHECK-ORIGINS: store {{.*}} align 32
+; CHECK-ORIGINS: br label
+; CHECK-ORIGINS: <label>
+; CHECK: store {{.*}} align 32
+; CHECK: ret void
+
+
; load followed by cmp: check that we load the shadow and call __msan_warning.
-define void @LoadAndCmp(i32* nocapture %a) nounwind uwtable {
+define void @LoadAndCmp(i32* nocapture %a) nounwind uwtable sanitize_memory {
entry:
%0 = load i32* %a, align 4
%tobool = icmp eq i32 %0, 0
declare void @foo(...)
-; CHECK: define void @LoadAndCmp
+; CHECK: @LoadAndCmp
; CHECK: = load
; CHECK: = load
; CHECK: call void @__msan_warning_noreturn()
; CHECK-NEXT: call void asm sideeffect
; CHECK-NEXT: unreachable
-; CHECK: }
+; CHECK: ret void
; Check that we store the shadow for the retval.
-define i32 @ReturnInt() nounwind uwtable readnone {
+define i32 @ReturnInt() nounwind uwtable readnone sanitize_memory {
entry:
ret i32 123
}
-; CHECK: define i32 @ReturnInt()
+; CHECK: @ReturnInt
; CHECK: store i32 0,{{.*}}__msan_retval_tls
-; CHECK: }
+; CHECK: ret i32
; Check that we get the shadow for the retval.
-define void @CopyRetVal(i32* nocapture %a) nounwind uwtable {
+define void @CopyRetVal(i32* nocapture %a) nounwind uwtable sanitize_memory {
entry:
%call = tail call i32 @ReturnInt() nounwind
store i32 %call, i32* %a, align 4
ret void
}
-; CHECK: define void @CopyRetVal
+; CHECK: @CopyRetVal
; CHECK: load{{.*}}__msan_retval_tls
; CHECK: store
; CHECK: store
-; CHECK: }
+; CHECK: ret void
; Check that we generate PHIs for shadow.
-define void @FuncWithPhi(i32* nocapture %a, i32* %b, i32* nocapture %c) nounwind uwtable {
+define void @FuncWithPhi(i32* nocapture %a, i32* %b, i32* nocapture %c) nounwind uwtable sanitize_memory {
entry:
%tobool = icmp eq i32* %b, null
br i1 %tobool, label %if.else, label %if.then
ret void
}
-; CHECK: define void @FuncWithPhi
+; CHECK: @FuncWithPhi
; CHECK: = phi
; CHECK-NEXT: = phi
; CHECK: store
; CHECK: store
-; CHECK: }
+; CHECK: ret void
; Compute shadow for "x << 10"
-define void @ShlConst(i32* nocapture %x) nounwind uwtable {
+define void @ShlConst(i32* nocapture %x) nounwind uwtable sanitize_memory {
entry:
%0 = load i32* %x, align 4
%1 = shl i32 %0, 10
ret void
}
-; CHECK: define void @ShlConst
+; CHECK: @ShlConst
; CHECK: = load
; CHECK: = load
; CHECK: shl
; CHECK: shl
; CHECK: store
; CHECK: store
-; CHECK: }
+; CHECK: ret void
; Compute shadow for "10 << x": it should have 'sext i1'.
-define void @ShlNonConst(i32* nocapture %x) nounwind uwtable {
+define void @ShlNonConst(i32* nocapture %x) nounwind uwtable sanitize_memory {
entry:
%0 = load i32* %x, align 4
%1 = shl i32 10, %0
ret void
}
-; CHECK: define void @ShlNonConst
+; CHECK: @ShlNonConst
; CHECK: = load
; CHECK: = load
; CHECK: = sext i1
; CHECK: store
; CHECK: store
-; CHECK: }
+; CHECK: ret void
; SExt
-define void @SExt(i32* nocapture %a, i16* nocapture %b) nounwind uwtable {
+define void @SExt(i32* nocapture %a, i16* nocapture %b) nounwind uwtable sanitize_memory {
entry:
%0 = load i16* %b, align 2
%1 = sext i16 %0 to i32
ret void
}
-; CHECK: define void @SExt
+; CHECK: @SExt
; CHECK: = load
; CHECK: = load
; CHECK: = sext
; CHECK: = sext
; CHECK: store
; CHECK: store
-; CHECK: }
+; CHECK: ret void
; memset
-define void @MemSet(i8* nocapture %x) nounwind uwtable {
+define void @MemSet(i8* nocapture %x) nounwind uwtable sanitize_memory {
entry:
call void @llvm.memset.p0i8.i64(i8* %x, i8 42, i64 10, i32 1, i1 false)
ret void
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
-; CHECK: define void @MemSet
+; CHECK: @MemSet
; CHECK: call i8* @__msan_memset
-; CHECK: }
+; CHECK: ret void
; memcpy
-define void @MemCpy(i8* nocapture %x, i8* nocapture %y) nounwind uwtable {
+define void @MemCpy(i8* nocapture %x, i8* nocapture %y) nounwind uwtable sanitize_memory {
entry:
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %x, i8* %y, i64 10, i32 1, i1 false)
ret void
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
-; CHECK: define void @MemCpy
+; CHECK: @MemCpy
; CHECK: call i8* @__msan_memcpy
-; CHECK: }
+; CHECK: ret void
; memmove is lowered to a call
-define void @MemMove(i8* nocapture %x, i8* nocapture %y) nounwind uwtable {
+define void @MemMove(i8* nocapture %x, i8* nocapture %y) nounwind uwtable sanitize_memory {
entry:
call void @llvm.memmove.p0i8.p0i8.i64(i8* %x, i8* %y, i64 10, i32 1, i1 false)
ret void
declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
-; CHECK: define void @MemMove
+; CHECK: @MemMove
; CHECK: call i8* @__msan_memmove
-; CHECK: }
+; CHECK: ret void
; Check that we propagate shadow for "select"
-define i32 @Select(i32 %a, i32 %b, i32 %c) nounwind uwtable readnone {
+define i32 @Select(i32 %a, i32 %b, i1 %c) nounwind uwtable readnone sanitize_memory {
entry:
- %tobool = icmp ne i32 %c, 0
- %cond = select i1 %tobool, i32 %a, i32 %b
+ %cond = select i1 %c, i32 %a, i32 %b
ret i32 %cond
}
-; CHECK: define i32 @Select
-; CHECK: select
-; CHECK-NEXT: select
-; CHECK: }
+; CHECK: @Select
+; CHECK: select i1
+; CHECK-DAG: or i32
+; CHECK-DAG: xor i32
+; CHECK: or i32
+; CHECK-DAG: select i1
+; CHECK-ORIGINS-DAG: select
+; CHECK-ORIGINS-DAG: select
+; CHECK-DAG: select i1
+; CHECK: store i32{{.*}}@__msan_retval_tls
+; CHECK-ORIGINS: store i32{{.*}}@__msan_retval_origin_tls
+; CHECK: ret i32
+
+
+; Check that we propagate origin for "select" with vector condition.
+; Select condition is flattened to i1, which is then used to select one of the
+; argument origins.
+
+define <8 x i16> @SelectVector(<8 x i16> %a, <8 x i16> %b, <8 x i1> %c) nounwind uwtable readnone sanitize_memory {
+entry:
+ %cond = select <8 x i1> %c, <8 x i16> %a, <8 x i16> %b
+ ret <8 x i16> %cond
+}
+
+; CHECK: @SelectVector
+; CHECK: select <8 x i1>
+; CHECK-DAG: or <8 x i16>
+; CHECK-DAG: xor <8 x i16>
+; CHECK: or <8 x i16>
+; CHECK-DAG: select <8 x i1>
+; CHECK-ORIGINS-DAG: select
+; CHECK-ORIGINS-DAG: select
+; CHECK-DAG: select <8 x i1>
+; CHECK: store <8 x i16>{{.*}}@__msan_retval_tls
+; CHECK-ORIGINS: store i32{{.*}}@__msan_retval_origin_tls
+; CHECK: ret <8 x i16>
+
+
+; Check that we propagate origin for "select" with scalar condition and vector
+; arguments. Select condition shadow is sign-extended to the vector type and
+; mixed into the result shadow.
+
+define <8 x i16> @SelectVector2(<8 x i16> %a, <8 x i16> %b, i1 %c) nounwind uwtable readnone sanitize_memory {
+entry:
+ %cond = select i1 %c, <8 x i16> %a, <8 x i16> %b
+ ret <8 x i16> %cond
+}
+
+; CHECK: @SelectVector2
+; CHECK: select i1
+; CHECK-DAG: or <8 x i16>
+; CHECK-DAG: xor <8 x i16>
+; CHECK: or <8 x i16>
+; CHECK-DAG: select i1
+; CHECK-ORIGINS-DAG: select i1
+; CHECK-ORIGINS-DAG: select i1
+; CHECK-DAG: select i1
+; CHECK: ret <8 x i16>
-define i8* @IntToPtr(i64 %x) nounwind uwtable readnone {
+define { i64, i64 } @SelectStruct(i1 zeroext %x, { i64, i64 } %a, { i64, i64 } %b) readnone sanitize_memory {
+entry:
+ %c = select i1 %x, { i64, i64 } %a, { i64, i64 } %b
+ ret { i64, i64 } %c
+}
+
+; CHECK: @SelectStruct
+; CHECK: select i1 {{.*}}, { i64, i64 }
+; CHECK-NEXT: select i1 {{.*}}, { i64, i64 } { i64 -1, i64 -1 }, { i64, i64 }
+; CHECK-ORIGINS: select i1
+; CHECK-ORIGINS: select i1
+; CHECK-NEXT: select i1 {{.*}}, { i64, i64 }
+; CHECK: ret { i64, i64 }
+
+
+define { i64*, double } @SelectStruct2(i1 zeroext %x, { i64*, double } %a, { i64*, double } %b) readnone sanitize_memory {
+entry:
+ %c = select i1 %x, { i64*, double } %a, { i64*, double } %b
+ ret { i64*, double } %c
+}
+
+; CHECK: @SelectStruct2
+; CHECK: select i1 {{.*}}, { i64, i64 }
+; CHECK-NEXT: select i1 {{.*}}, { i64, i64 } { i64 -1, i64 -1 }, { i64, i64 }
+; CHECK-ORIGINS: select i1
+; CHECK-ORIGINS: select i1
+; CHECK-NEXT: select i1 {{.*}}, { i64*, double }
+; CHECK: ret { i64*, double }
+
+
+define i8* @IntToPtr(i64 %x) nounwind uwtable readnone sanitize_memory {
entry:
%0 = inttoptr i64 %x to i8*
ret i8* %0
}
-; CHECK: define i8* @IntToPtr
+; CHECK: @IntToPtr
; CHECK: load i64*{{.*}}__msan_param_tls
+; CHECK-ORIGINS-NEXT: load i32*{{.*}}__msan_param_origin_tls
; CHECK-NEXT: inttoptr
; CHECK-NEXT: store i64{{.*}}__msan_retval_tls
-; CHECK: }
+; CHECK: ret i8*
-define i8* @IntToPtr_ZExt(i16 %x) nounwind uwtable readnone {
+define i8* @IntToPtr_ZExt(i16 %x) nounwind uwtable readnone sanitize_memory {
entry:
%0 = inttoptr i16 %x to i8*
ret i8* %0
}
-; CHECK: define i8* @IntToPtr_ZExt
+; CHECK: @IntToPtr_ZExt
+; CHECK: load i16*{{.*}}__msan_param_tls
; CHECK: zext
; CHECK-NEXT: inttoptr
-; CHECK: }
+; CHECK-NEXT: store i64{{.*}}__msan_retval_tls
+; CHECK: ret i8*
; Check that we insert exactly one check on udiv
; (2nd arg shadow is checked, 1st arg shadow is propagated)
-define i32 @Div(i32 %a, i32 %b) nounwind uwtable readnone {
+define i32 @Div(i32 %a, i32 %b) nounwind uwtable readnone sanitize_memory {
entry:
%div = udiv i32 %a, %b
ret i32 %div
}
-; CHECK: define i32 @Div
+; CHECK: @Div
; CHECK: icmp
-; CHECK: br
+; CHECK: call void @__msan_warning
; CHECK-NOT: icmp
; CHECK: udiv
; CHECK-NOT: icmp
-; CHECK: }
+; CHECK: ret i32
+
+
+; Check that we propagate shadow for x<0, x>=0, etc (i.e. sign bit tests)
+
+define zeroext i1 @ICmpSLT(i32 %x) nounwind uwtable readnone sanitize_memory {
+ %1 = icmp slt i32 %x, 0
+ ret i1 %1
+}
+
+; CHECK: @ICmpSLT
+; CHECK: icmp slt
+; CHECK-NOT: call void @__msan_warning
+; CHECK: icmp slt
+; CHECK-NOT: call void @__msan_warning
+; CHECK: ret i1
+
+define zeroext i1 @ICmpSGE(i32 %x) nounwind uwtable readnone sanitize_memory {
+ %1 = icmp sge i32 %x, 0
+ ret i1 %1
+}
+
+; CHECK: @ICmpSGE
+; CHECK: icmp slt
+; CHECK-NOT: call void @__msan_warning
+; CHECK: icmp sge
+; CHECK-NOT: call void @__msan_warning
+; CHECK: ret i1
+
+define zeroext i1 @ICmpSGT(i32 %x) nounwind uwtable readnone sanitize_memory {
+ %1 = icmp sgt i32 0, %x
+ ret i1 %1
+}
+
+; CHECK: @ICmpSGT
+; CHECK: icmp slt
+; CHECK-NOT: call void @__msan_warning
+; CHECK: icmp sgt
+; CHECK-NOT: call void @__msan_warning
+; CHECK: ret i1
+
+define zeroext i1 @ICmpSLE(i32 %x) nounwind uwtable readnone sanitize_memory {
+ %1 = icmp sle i32 0, %x
+ ret i1 %1
+}
+
+; CHECK: @ICmpSLE
+; CHECK: icmp slt
+; CHECK-NOT: call void @__msan_warning
+; CHECK: icmp sle
+; CHECK-NOT: call void @__msan_warning
+; CHECK: ret i1
+
+
+; Check that we propagate shadow for x<0, x>=0, etc (i.e. sign bit tests)
+; of the vector arguments.
+
+define <2 x i1> @ICmpSLT_vector(<2 x i32*> %x) nounwind uwtable readnone sanitize_memory {
+ %1 = icmp slt <2 x i32*> %x, zeroinitializer
+ ret <2 x i1> %1
+}
+
+; CHECK: @ICmpSLT_vector
+; CHECK: icmp slt <2 x i64>
+; CHECK-NOT: call void @__msan_warning
+; CHECK: icmp slt <2 x i32*>
+; CHECK-NOT: call void @__msan_warning
+; CHECK: ret <2 x i1>
+
+
+; Check that we propagate shadow for unsigned relational comparisons with
+; constants
+
+define zeroext i1 @ICmpUGTConst(i32 %x) nounwind uwtable readnone sanitize_memory {
+entry:
+ %cmp = icmp ugt i32 %x, 7
+ ret i1 %cmp
+}
+
+; CHECK: @ICmpUGTConst
+; CHECK: icmp ugt i32
+; CHECK-NOT: call void @__msan_warning
+; CHECK: icmp ugt i32
+; CHECK-NOT: call void @__msan_warning
+; CHECK: icmp ugt i32
+; CHECK-NOT: call void @__msan_warning
+; CHECK: ret i1
+
+
+; Check that loads of shadow have the same aligment as the original loads.
+; Check that loads of origin have the aligment of max(4, original alignment).
+
+define i32 @ShadowLoadAlignmentLarge() nounwind uwtable sanitize_memory {
+ %y = alloca i32, align 64
+ %1 = load volatile i32* %y, align 64
+ ret i32 %1
+}
+
+; CHECK: @ShadowLoadAlignmentLarge
+; CHECK: load volatile i32* {{.*}} align 64
+; CHECK: load i32* {{.*}} align 64
+; CHECK: ret i32
+
+define i32 @ShadowLoadAlignmentSmall() nounwind uwtable sanitize_memory {
+ %y = alloca i32, align 2
+ %1 = load volatile i32* %y, align 2
+ ret i32 %1
+}
+
+; CHECK: @ShadowLoadAlignmentSmall
+; CHECK: load volatile i32* {{.*}} align 2
+; CHECK: load i32* {{.*}} align 2
+; CHECK-ORIGINS: load i32* {{.*}} align 4
+; CHECK: ret i32
+
+
+; Test vector manipulation instructions.
+; Check that the same bit manipulation is applied to the shadow values.
+; Check that there is a zero test of the shadow of %idx argument, where present.
+
+define i32 @ExtractElement(<4 x i32> %vec, i32 %idx) sanitize_memory {
+ %x = extractelement <4 x i32> %vec, i32 %idx
+ ret i32 %x
+}
+
+; CHECK: @ExtractElement
+; CHECK: extractelement
+; CHECK: call void @__msan_warning
+; CHECK: extractelement
+; CHECK: ret i32
+
+define <4 x i32> @InsertElement(<4 x i32> %vec, i32 %idx, i32 %x) sanitize_memory {
+ %vec1 = insertelement <4 x i32> %vec, i32 %x, i32 %idx
+ ret <4 x i32> %vec1
+}
+
+; CHECK: @InsertElement
+; CHECK: insertelement
+; CHECK: call void @__msan_warning
+; CHECK: insertelement
+; CHECK: ret <4 x i32>
+
+define <4 x i32> @ShuffleVector(<4 x i32> %vec, <4 x i32> %vec1) sanitize_memory {
+ %vec2 = shufflevector <4 x i32> %vec, <4 x i32> %vec1,
+ <4 x i32> <i32 0, i32 4, i32 1, i32 5>
+ ret <4 x i32> %vec2
+}
+
+; CHECK: @ShuffleVector
+; CHECK: shufflevector
+; CHECK-NOT: call void @__msan_warning
+; CHECK: shufflevector
+; CHECK: ret <4 x i32>
+
+
+; Test bswap intrinsic instrumentation
+define i32 @BSwap(i32 %x) nounwind uwtable readnone sanitize_memory {
+ %y = tail call i32 @llvm.bswap.i32(i32 %x)
+ ret i32 %y
+}
+
+declare i32 @llvm.bswap.i32(i32) nounwind readnone
+
+; CHECK: @BSwap
+; CHECK-NOT: call void @__msan_warning
+; CHECK: @llvm.bswap.i32
+; CHECK-NOT: call void @__msan_warning
+; CHECK: @llvm.bswap.i32
+; CHECK-NOT: call void @__msan_warning
+; CHECK: ret i32
+
+
+; Store intrinsic.
+
+define void @StoreIntrinsic(i8* %p, <4 x float> %x) nounwind uwtable sanitize_memory {
+ call void @llvm.x86.sse.storeu.ps(i8* %p, <4 x float> %x)
+ ret void
+}
+
+declare void @llvm.x86.sse.storeu.ps(i8*, <4 x float>) nounwind
+
+; CHECK: @StoreIntrinsic
+; CHECK-NOT: br
+; CHECK-NOT: = or
+; CHECK: store <4 x i32> {{.*}} align 1
+; CHECK: call void @llvm.x86.sse.storeu.ps
+; CHECK: ret void
+
+
+; Load intrinsic.
+
+define <16 x i8> @LoadIntrinsic(i8* %p) nounwind uwtable sanitize_memory {
+ %call = call <16 x i8> @llvm.x86.sse3.ldu.dq(i8* %p)
+ ret <16 x i8> %call
+}
+
+declare <16 x i8> @llvm.x86.sse3.ldu.dq(i8* %p) nounwind
+
+; CHECK: @LoadIntrinsic
+; CHECK: load <16 x i8>* {{.*}} align 1
+; CHECK-ORIGINS: [[ORIGIN:%[01-9a-z]+]] = load i32* {{.*}}
+; CHECK-NOT: br
+; CHECK-NOT: = or
+; CHECK: call <16 x i8> @llvm.x86.sse3.ldu.dq
+; CHECK: store <16 x i8> {{.*}} @__msan_retval_tls
+; CHECK-ORIGINS: store i32 {{.*}}[[ORIGIN]], i32* @__msan_retval_origin_tls
+; CHECK: ret <16 x i8>
+
+
+; Simple NoMem intrinsic
+; Check that shadow is OR'ed, and origin is Select'ed
+; And no shadow checks!
+
+define <8 x i16> @Paddsw128(<8 x i16> %a, <8 x i16> %b) nounwind uwtable sanitize_memory {
+ %call = call <8 x i16> @llvm.x86.sse2.padds.w(<8 x i16> %a, <8 x i16> %b)
+ ret <8 x i16> %call
+}
+
+declare <8 x i16> @llvm.x86.sse2.padds.w(<8 x i16> %a, <8 x i16> %b) nounwind
+
+; CHECK: @Paddsw128
+; CHECK-NEXT: load <8 x i16>* {{.*}} @__msan_param_tls
+; CHECK-ORIGINS: load i32* {{.*}} @__msan_param_origin_tls
+; CHECK-NEXT: load <8 x i16>* {{.*}} @__msan_param_tls
+; CHECK-ORIGINS: load i32* {{.*}} @__msan_param_origin_tls
+; CHECK-NEXT: = or <8 x i16>
+; CHECK-ORIGINS: = bitcast <8 x i16> {{.*}} to i128
+; CHECK-ORIGINS-NEXT: = icmp ne i128 {{.*}}, 0
+; CHECK-ORIGINS-NEXT: = select i1 {{.*}}, i32 {{.*}}, i32
+; CHECK-NEXT: call <8 x i16> @llvm.x86.sse2.padds.w
+; CHECK-NEXT: store <8 x i16> {{.*}} @__msan_retval_tls
+; CHECK-ORIGINS: store i32 {{.*}} @__msan_retval_origin_tls
+; CHECK-NEXT: ret <8 x i16>
+
+
+; Test handling of vectors of pointers.
+; Check that shadow of such vector is a vector of integers.
+
+define <8 x i8*> @VectorOfPointers(<8 x i8*>* %p) nounwind uwtable sanitize_memory {
+ %x = load <8 x i8*>* %p
+ ret <8 x i8*> %x
+}
+
+; CHECK: @VectorOfPointers
+; CHECK: load <8 x i8*>*
+; CHECK: load <8 x i64>*
+; CHECK: store <8 x i64> {{.*}} @__msan_retval_tls
+; CHECK: ret <8 x i8*>
+
+; Test handling of va_copy.
+
+declare void @llvm.va_copy(i8*, i8*) nounwind
+
+define void @VACopy(i8* %p1, i8* %p2) nounwind uwtable sanitize_memory {
+ call void @llvm.va_copy(i8* %p1, i8* %p2) nounwind
+ ret void
+}
+
+; CHECK: @VACopy
+; CHECK: call void @llvm.memset.p0i8.i64({{.*}}, i8 0, i64 24, i32 8, i1 false)
+; CHECK: ret void
+
+
+; Test that va_start instrumentation does not use va_arg_tls*.
+; It should work with a local stack copy instead.
+
+%struct.__va_list_tag = type { i32, i32, i8*, i8* }
+declare void @llvm.va_start(i8*) nounwind
+
+; Function Attrs: nounwind uwtable
+define void @VAStart(i32 %x, ...) sanitize_memory {
+entry:
+ %x.addr = alloca i32, align 4
+ %va = alloca [1 x %struct.__va_list_tag], align 16
+ store i32 %x, i32* %x.addr, align 4
+ %arraydecay = getelementptr inbounds [1 x %struct.__va_list_tag]* %va, i32 0, i32 0
+ %arraydecay1 = bitcast %struct.__va_list_tag* %arraydecay to i8*
+ call void @llvm.va_start(i8* %arraydecay1)
+ ret void
+}
+
+; CHECK: @VAStart
+; CHECK: call void @llvm.va_start
+; CHECK-NOT: @__msan_va_arg_tls
+; CHECK-NOT: @__msan_va_arg_overflow_size_tls
+; CHECK: ret void
+
+
+; Test handling of volatile stores.
+; Check that MemorySanitizer does not add a check of the value being stored.
+
+define void @VolatileStore(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory {
+entry:
+ store volatile i32 %x, i32* %p, align 4
+ ret void
+}
+
+; CHECK: @VolatileStore
+; CHECK-NOT: @__msan_warning
+; CHECK: ret void
+
+
+; Test that checks are omitted and returned value is always initialized if
+; sanitize_memory attribute is missing.
+
+define i32 @NoSanitizeMemory(i32 %x) uwtable {
+entry:
+ %tobool = icmp eq i32 %x, 0
+ br i1 %tobool, label %if.end, label %if.then
+
+if.then: ; preds = %entry
+ tail call void @bar()
+ br label %if.end
+
+if.end: ; preds = %entry, %if.then
+ ret i32 %x
+}
+
+declare void @bar()
+
+; CHECK: @NoSanitizeMemory
+; CHECK-NOT: @__msan_warning
+; CHECK: store i32 0, {{.*}} @__msan_retval_tls
+; CHECK-NOT: @__msan_warning
+; CHECK: ret i32
+
+
+; Test that stack allocations are unpoisoned in functions missing
+; sanitize_memory attribute
+
+define i32 @NoSanitizeMemoryAlloca() {
+entry:
+ %p = alloca i32, align 4
+ %x = call i32 @NoSanitizeMemoryAllocaHelper(i32* %p)
+ ret i32 %x
+}
+
+declare i32 @NoSanitizeMemoryAllocaHelper(i32* %p)
+
+; CHECK: @NoSanitizeMemoryAlloca
+; CHECK: call void @llvm.memset.p0i8.i64(i8* {{.*}}, i8 0, i64 4, i32 4, i1 false)
+; CHECK: call i32 @NoSanitizeMemoryAllocaHelper(i32*
+; CHECK: ret i32
+
+
+; Test that undef is unpoisoned in functions missing
+; sanitize_memory attribute
+
+define i32 @NoSanitizeMemoryUndef() {
+entry:
+ %x = call i32 @NoSanitizeMemoryUndefHelper(i32 undef)
+ ret i32 %x
+}
+
+declare i32 @NoSanitizeMemoryUndefHelper(i32 %x)
+
+; CHECK: @NoSanitizeMemoryAlloca
+; CHECK: store i32 0, i32* {{.*}} @__msan_param_tls
+; CHECK: call i32 @NoSanitizeMemoryUndefHelper(i32 undef)
+; CHECK: ret i32
+
+
+; Test PHINode instrumentation in blacklisted functions
+
+define i32 @NoSanitizeMemoryPHI(i32 %x) {
+entry:
+ %tobool = icmp ne i32 %x, 0
+ br i1 %tobool, label %cond.true, label %cond.false
+
+cond.true: ; preds = %entry
+ br label %cond.end
+
+cond.false: ; preds = %entry
+ br label %cond.end
+
+cond.end: ; preds = %cond.false, %cond.true
+ %cond = phi i32 [ undef, %cond.true ], [ undef, %cond.false ]
+ ret i32 %cond
+}
+
+; CHECK: [[A:%.*]] = phi i32 [ undef, %cond.true ], [ undef, %cond.false ]
+; CHECK: store i32 0, i32* bitcast {{.*}} @__msan_retval_tls
+; CHECK: ret i32 [[A]]
+
+
+; Test that there are no __msan_param_origin_tls stores when
+; argument shadow is a compile-time zero constant (which is always the case
+; in functions missing sanitize_memory attribute).
+
+define i32 @NoSanitizeMemoryParamTLS(i32* nocapture readonly %x) {
+entry:
+ %0 = load i32* %x, align 4
+ %call = tail call i32 @NoSanitizeMemoryParamTLSHelper(i32 %0)
+ ret i32 %call
+}
+
+declare i32 @NoSanitizeMemoryParamTLSHelper(i32 %x)
+
+; CHECK-LABEL: define i32 @NoSanitizeMemoryParamTLS(
+; CHECK-NOT: __msan_param_origin_tls
+; CHECK: ret i32
+
+
+; Test argument shadow alignment
+
+define <2 x i64> @ArgumentShadowAlignment(i64 %a, <2 x i64> %b) sanitize_memory {
+entry:
+ ret <2 x i64> %b
+}
+
+; CHECK: @ArgumentShadowAlignment
+; CHECK: load <2 x i64>* {{.*}} @__msan_param_tls {{.*}}, align 8
+; CHECK: store <2 x i64> {{.*}} @__msan_retval_tls {{.*}}, align 8
+; CHECK: ret <2 x i64>
+
+
+; Test origin propagation for insertvalue
+
+define { i64, i32 } @make_pair_64_32(i64 %x, i32 %y) sanitize_memory {
+entry:
+ %a = insertvalue { i64, i32 } undef, i64 %x, 0
+ %b = insertvalue { i64, i32 } %a, i32 %y, 1
+ ret { i64, i32 } %b
+}
+
+; CHECK-ORIGINS: @make_pair_64_32
+; First element shadow
+; CHECK-ORIGINS: insertvalue { i64, i32 } { i64 -1, i32 -1 }, i64 {{.*}}, 0
+; First element origin
+; CHECK-ORIGINS: icmp ne i64
+; CHECK-ORIGINS: select i1
+; First element app value
+; CHECK-ORIGINS: insertvalue { i64, i32 } undef, i64 {{.*}}, 0
+; Second element shadow
+; CHECK-ORIGINS: insertvalue { i64, i32 } {{.*}}, i32 {{.*}}, 1
+; Second element origin
+; CHECK-ORIGINS: icmp ne i32
+; CHECK-ORIGINS: select i1
+; Second element app value
+; CHECK-ORIGINS: insertvalue { i64, i32 } {{.*}}, i32 {{.*}}, 1
+; CHECK-ORIGINS: ret { i64, i32 }
+
+
+; Test shadow propagation for aggregates passed through ellipsis.
+
+%struct.StructByVal = type { i32, i32, i32, i32 }
+
+declare void @VAArgStructFn(i32 %guard, ...)
+
+define void @VAArgStruct(%struct.StructByVal* nocapture %s) sanitize_memory {
+entry:
+ %agg.tmp2 = alloca %struct.StructByVal, align 8
+ %0 = bitcast %struct.StructByVal* %s to i8*
+ %agg.tmp.sroa.0.0..sroa_cast = bitcast %struct.StructByVal* %s to i64*
+ %agg.tmp.sroa.0.0.copyload = load i64* %agg.tmp.sroa.0.0..sroa_cast, align 4
+ %agg.tmp.sroa.2.0..sroa_idx = getelementptr inbounds %struct.StructByVal* %s, i64 0, i32 2
+ %agg.tmp.sroa.2.0..sroa_cast = bitcast i32* %agg.tmp.sroa.2.0..sroa_idx to i64*
+ %agg.tmp.sroa.2.0.copyload = load i64* %agg.tmp.sroa.2.0..sroa_cast, align 4
+ %1 = bitcast %struct.StructByVal* %agg.tmp2 to i8*
+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* %1, i8* %0, i64 16, i32 4, i1 false)
+ call void (i32, ...)* @VAArgStructFn(i32 undef, i64 %agg.tmp.sroa.0.0.copyload, i64 %agg.tmp.sroa.2.0.copyload, i64 %agg.tmp.sroa.0.0.copyload, i64 %agg.tmp.sroa.2.0.copyload, %struct.StructByVal* byval align 8 %agg.tmp2)
+ ret void
+}
+
+; "undef" and the first 2 structs go to general purpose registers;
+; the third struct goes to the overflow area byval
+
+; CHECK: @VAArgStruct
+; undef
+; CHECK: store i32 -1, i32* {{.*}}@__msan_va_arg_tls {{.*}}, align 8
+; first struct through general purpose registers
+; CHECK: store i64 {{.*}}, i64* {{.*}}@__msan_va_arg_tls{{.*}}, i64 8){{.*}}, align 8
+; CHECK: store i64 {{.*}}, i64* {{.*}}@__msan_va_arg_tls{{.*}}, i64 16){{.*}}, align 8
+; second struct through general purpose registers
+; CHECK: store i64 {{.*}}, i64* {{.*}}@__msan_va_arg_tls{{.*}}, i64 24){{.*}}, align 8
+; CHECK: store i64 {{.*}}, i64* {{.*}}@__msan_va_arg_tls{{.*}}, i64 32){{.*}}, align 8
+; third struct through the overflow area byval
+; CHECK: ptrtoint %struct.StructByVal* {{.*}} to i64
+; CHECK: bitcast { i32, i32, i32, i32 }* {{.*}}@__msan_va_arg_tls {{.*}}, i64 176
+; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+; CHECK: store i64 16, i64* @__msan_va_arg_overflow_size_tls
+; CHECK: call void (i32, ...)* @VAArgStructFn
+; CHECK: ret void
+
+declare i32 @InnerTailCall(i32 %a)
+
+define void @MismatchedReturnTypeTailCall(i32 %a) sanitize_memory {
+ %b = tail call i32 @InnerTailCall(i32 %a)
+ ret void
+}
+
+; We used to strip off the 'tail' modifier, but now that we unpoison return slot
+; shadow before the call, we don't need to anymore.
+
+; CHECK-LABEL: define void @MismatchedReturnTypeTailCall
+; CHECK: tail call i32 @InnerTailCall
+; CHECK: ret void
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