1 ; RUN: opt < %s -msan-check-access-address=0 -msan-eager-checks=1 -msan-track-origins=1 -S -passes=msan 2>&1 | FileCheck --check-prefixes=CHECK,CONST %s --implicit-check-not=icmp --implicit-check-not="store i" --implicit-check-not="call void @__msan"
2 ; RUN: opt < %s -msan-check-access-address=0 -msan-check-constant-shadow=0 -msan-eager-checks=1 -msan-track-origins=1 -S -passes=msan 2>&1 | FileCheck --check-prefixes=CHECK %s --implicit-check-not=icmp --implicit-check-not="store i" --implicit-check-not="call void @__msan"
4 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 target triple = "x86_64-unknown-linux-gnu"
7 ; Test that returning a literal undef from main() triggers an MSan warning.
9 ; main() is special: it inserts check for the return value
10 define i32 @main() nounwind uwtable sanitize_memory {
16 ; CHECK: store i32 0, ptr @__msan_retval_tls
17 ; CONST: call void @__msan_warning_with_origin_noreturn
18 ; CHECK: ret i32 undef
21 ; This function stores known initialized value.
22 ; Expect 2 stores: one for the shadow (0), one for the value (42), but no origin.
23 define void @StoreConstant(ptr nocapture %p) nounwind uwtable sanitize_memory {
25 store i32 42, ptr %p, align 4
29 ; CHECK-LABEL: @StoreConstant
31 ; CHECK: store i32 42,
35 ; This function stores known uninitialized value.
36 ; Expect 3 stores: shadow, value and origin.
37 ; Expect no icmp(s): everything here is unconditional.
38 define void @StoreUndef(ptr nocapture %p) nounwind uwtable sanitize_memory {
40 store i32 undef, ptr %p, align 4
44 ; CHECK-LABEL: @StoreUndef
45 ; CHECK: store i32 -1,
47 ; CHECK: store i32 undef,
51 ; This function stores known initialized value, but msan can't prove this.
52 define i32 @MaybeUninitialized(<2 x i64> noundef %acc) nounwind uwtable sanitize_memory {
54 %shift = shufflevector <2 x i64> %acc, <2 x i64> poison, <2 x i32> <i32 1, i32 undef>
55 %0 = add <2 x i64> %shift, %acc
56 %1 = bitcast <2 x i64> %0 to <4 x i32>
57 %conv = extractelement <4 x i32> %1, i64 0
61 ; CHECK-LABEL: @MaybeUninitialized
62 ; CHECK: store i32 extractelement (<4 x i32> bitcast (<2 x i64> <i64 0, i64 undef> to <4 x i32>), i64 0), ptr @__msan_retval_tls, align 8
63 ; CHECK: store i32 0, ptr @__msan_retval_origin_tls
65 ; This function stores known initialized value, but msan can't prove this.
66 define noundef i32 @MaybeUninitializedRetNoUndef(<2 x i64> noundef %acc) nounwind uwtable sanitize_memory {
68 %shift = shufflevector <2 x i64> %acc, <2 x i64> poison, <2 x i32> <i32 1, i32 undef>
69 %0 = add <2 x i64> %shift, %acc
70 %1 = bitcast <2 x i64> %0 to <4 x i32>
71 %conv = extractelement <4 x i32> %1, i64 0
75 ; CHECK-LABEL: @MaybeUninitializedRetNoUndef
76 ; CONST: [[CMP:%.*]] = icmp ne i32 extractelement (<4 x i32> bitcast (<2 x i64> <i64 0, i64 undef> to <4 x i32>), i64 0), 0
77 ; CONST: br i1 [[CMP]]
78 ; CONST: call void @__msan_warning_with_origin_noreturn
80 ; CHECK: call void @__msan_init()