1; RUN: opt < %s -msan-check-access-address=1 -S -passes=msan 2>&1 | FileCheck  \
2; RUN: %s
3; RUN: opt < %s -msan -msan-check-access-address=1 -S | FileCheck %s
4
5target 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"
6target triple = "x86_64-unknown-linux-gnu"
7
8
9; Test byval argument shadow alignment
10
11define <2 x i64> @ByValArgumentShadowLargeAlignment(<2 x i64>* byval(<2 x i64>) %p) sanitize_memory {
12entry:
13  %x = load <2 x i64>, <2 x i64>* %p
14  ret <2 x i64> %x
15}
16
17; CHECK-LABEL: @ByValArgumentShadowLargeAlignment
18; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 {{.*}}, i8* align 8 {{.*}}, i64 16, i1 false)
19; CHECK: ret <2 x i64>
20
21
22define i16 @ByValArgumentShadowSmallAlignment(i16* byval(i16) %p) sanitize_memory {
23entry:
24  %x = load i16, i16* %p
25  ret i16 %x
26}
27
28; CHECK-LABEL: @ByValArgumentShadowSmallAlignment
29; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 2 {{.*}}, i8* align 2 {{.*}}, i64 2, i1 false)
30; CHECK: ret i16
31
32
33; Check instrumentation of stores. The check must precede the shadow store.
34
35define void @Store(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory {
36entry:
37  store i32 %x, i32* %p, align 4
38  ret void
39}
40
41; CHECK-LABEL: @Store
42; CHECK: load {{.*}} @__msan_param_tls
43; Shadow calculations must happen after the check.
44; CHECK-NOT: xor
45; CHECK: icmp
46; CHECK: br i1
47; CHECK: {{^[0-9]+}}:
48; CHECK: call void @__msan_warning_with_origin_noreturn
49; CHECK: {{^[0-9]+}}:
50; CHECK: xor
51; CHECK: store
52; CHECK: store i32 %x
53; CHECK: ret void
54
55
56