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; RUN: opt < %s -msan -msan-check-access-address=0 -S | FileCheck %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"
; atomicrmw xchg: store clean shadow, return clean shadow
define i32 @AtomicRmwXchg(i32* %p, i32 %x) sanitize_memory {
entry:
%0 = atomicrmw xchg i32* %p, i32 %x seq_cst
ret i32 %0
}
; CHECK: @AtomicRmwXchg
; CHECK: store i32 0,
; CHECK: atomicrmw xchg {{.*}} seq_cst
; CHECK: store i32 0, {{.*}} @__msan_retval_tls
; CHECK: ret i32
; atomicrmw max: exactly the same as above
define i32 @AtomicRmwMax(i32* %p, i32 %x) sanitize_memory {
entry:
%0 = atomicrmw max i32* %p, i32 %x seq_cst
ret i32 %0
}
; CHECK: @AtomicRmwMax
; CHECK: store i32 0,
; CHECK: atomicrmw max {{.*}} seq_cst
; CHECK: store i32 0, {{.*}} @__msan_retval_tls
; CHECK: ret i32
; cmpxchg: the same as above, but also check %a shadow
define i32 @Cmpxchg(i32* %p, i32 %a, i32 %b) sanitize_memory {
entry:
%0 = cmpxchg i32* %p, i32 %a, i32 %b seq_cst
ret i32 %0
}
; CHECK: @Cmpxchg
; CHECK: store i32 0,
; CHECK: icmp
; CHECK: br
; CHECK: @__msan_warning
; CHECK: cmpxchg {{.*}} seq_cst
; CHECK: store i32 0, {{.*}} @__msan_retval_tls
; CHECK: ret i32
; relaxed cmpxchg: bump up to "release"
define i32 @CmpxchgMonotonic(i32* %p, i32 %a, i32 %b) sanitize_memory {
entry:
%0 = cmpxchg i32* %p, i32 %a, i32 %b monotonic
ret i32 %0
}
; CHECK: @CmpxchgMonotonic
; CHECK: store i32 0,
; CHECK: icmp
; CHECK: br
; CHECK: @__msan_warning
; CHECK: cmpxchg {{.*}} release
; CHECK: store i32 0, {{.*}} @__msan_retval_tls
; CHECK: ret i32
; atomic load: preserve alignment, load shadow value after app value
define i32 @AtomicLoad(i32* %p) sanitize_memory {
entry:
%0 = load atomic i32* %p seq_cst, align 16
ret i32 %0
}
; CHECK: @AtomicLoad
; CHECK: load atomic i32* {{.*}} seq_cst, align 16
; CHECK: [[SHADOW:%[01-9a-z_]+]] = load i32* {{.*}}, align 16
; CHECK: store i32 {{.*}}[[SHADOW]], {{.*}} @__msan_retval_tls
; CHECK: ret i32
; atomic load: preserve alignment, load shadow value after app value
define i32 @AtomicLoadAcquire(i32* %p) sanitize_memory {
entry:
%0 = load atomic i32* %p acquire, align 16
ret i32 %0
}
; CHECK: @AtomicLoadAcquire
; CHECK: load atomic i32* {{.*}} acquire, align 16
; CHECK: [[SHADOW:%[01-9a-z_]+]] = load i32* {{.*}}, align 16
; CHECK: store i32 {{.*}}[[SHADOW]], {{.*}} @__msan_retval_tls
; CHECK: ret i32
; atomic load monotonic: bump up to load acquire
define i32 @AtomicLoadMonotonic(i32* %p) sanitize_memory {
entry:
%0 = load atomic i32* %p monotonic, align 16
ret i32 %0
}
; CHECK: @AtomicLoadMonotonic
; CHECK: load atomic i32* {{.*}} acquire, align 16
; CHECK: [[SHADOW:%[01-9a-z_]+]] = load i32* {{.*}}, align 16
; CHECK: store i32 {{.*}}[[SHADOW]], {{.*}} @__msan_retval_tls
; CHECK: ret i32
; atomic load unordered: bump up to load acquire
define i32 @AtomicLoadUnordered(i32* %p) sanitize_memory {
entry:
%0 = load atomic i32* %p unordered, align 16
ret i32 %0
}
; CHECK: @AtomicLoadUnordered
; CHECK: load atomic i32* {{.*}} acquire, align 16
; CHECK: [[SHADOW:%[01-9a-z_]+]] = load i32* {{.*}}, align 16
; CHECK: store i32 {{.*}}[[SHADOW]], {{.*}} @__msan_retval_tls
; CHECK: ret i32
; atomic store: preserve alignment, store clean shadow value before app value
define void @AtomicStore(i32* %p, i32 %x) sanitize_memory {
entry:
store atomic i32 %x, i32* %p seq_cst, align 16
ret void
}
; CHECK: @AtomicStore
; CHECK-NOT: @__msan_param_tls
; CHECK: store i32 0, i32* {{.*}}, align 16
; CHECK: store atomic i32 %x, i32* %p seq_cst, align 16
; CHECK: ret void
; atomic store: preserve alignment, store clean shadow value before app value
define void @AtomicStoreRelease(i32* %p, i32 %x) sanitize_memory {
entry:
store atomic i32 %x, i32* %p release, align 16
ret void
}
; CHECK: @AtomicStoreRelease
; CHECK-NOT: @__msan_param_tls
; CHECK: store i32 0, i32* {{.*}}, align 16
; CHECK: store atomic i32 %x, i32* %p release, align 16
; CHECK: ret void
; atomic store monotonic: bumped up to store release
define void @AtomicStoreMonotonic(i32* %p, i32 %x) sanitize_memory {
entry:
store atomic i32 %x, i32* %p monotonic, align 16
ret void
}
; CHECK: @AtomicStoreMonotonic
; CHECK-NOT: @__msan_param_tls
; CHECK: store i32 0, i32* {{.*}}, align 16
; CHECK: store atomic i32 %x, i32* %p release, align 16
; CHECK: ret void
; atomic store unordered: bumped up to store release
define void @AtomicStoreUnordered(i32* %p, i32 %x) sanitize_memory {
entry:
store atomic i32 %x, i32* %p unordered, align 16
ret void
}
; CHECK: @AtomicStoreUnordered
; CHECK-NOT: @__msan_param_tls
; CHECK: store i32 0, i32* {{.*}}, align 16
; CHECK: store atomic i32 %x, i32* %p release, align 16
; CHECK: ret void
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