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|
; RUN: opt < %s -passes=tsan -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"
declare void @escape(ptr)
@sink = global ptr null, align 4
define void @captured0() nounwind uwtable sanitize_thread {
entry:
%ptr = alloca i32, align 4
; escapes due to call
call void @escape(ptr %ptr)
store i32 42, ptr %ptr, align 4
ret void
}
; CHECK-LABEL: define void @captured0
; CHECK: __tsan_write
; CHECK: ret void
define void @captured1() nounwind uwtable sanitize_thread {
entry:
%ptr = alloca i32, align 4
; escapes due to store into global
store ptr %ptr, ptr @sink, align 8
store i32 42, ptr %ptr, align 4
ret void
}
; CHECK-LABEL: define void @captured1
; CHECK: __tsan_write
; CHECK: __tsan_write
; CHECK: ret void
define void @captured2() nounwind uwtable sanitize_thread {
entry:
%ptr = alloca i32, align 4
%tmp = alloca ptr, align 8
; transitive escape
store ptr %ptr, ptr %tmp, align 8
%0 = load ptr, ptr %tmp, align 8
store ptr %0, ptr @sink, align 8
store i32 42, ptr %ptr, align 4
ret void
}
; CHECK-LABEL: define void @captured2
; CHECK: __tsan_write
; CHECK: __tsan_write
; CHECK-NOT: __tsan_write
; CHECK: ret void
define void @captured3() nounwind uwtable sanitize_thread {
entry:
%stkobj = alloca [2 x i32], align 8
; escapes due to store into global
store ptr %stkobj, ptr @sink, align 8
; derived is captured as its base object is captured
%derived = getelementptr inbounds i32, ptr %stkobj, i64 1
store i32 42, ptr %derived, align 4
ret void
}
; CHECK-LABEL: define void @captured3
; CHECK: __tsan_write
; CHECK: __tsan_write
; CHECK: ret void
define void @notcaptured0() nounwind uwtable sanitize_thread {
entry:
%ptr = alloca i32, align 4
store i32 42, ptr %ptr, align 4
; escapes due to call
call void @escape(ptr %ptr)
ret void
}
; CHECK-LABEL: define void @notcaptured0
; CHECK: __tsan_write
; CHECK: ret void
define void @notcaptured1() nounwind uwtable sanitize_thread {
entry:
%ptr = alloca i32, align 4
store i32 42, ptr %ptr, align 4
; escapes due to store into global
store ptr %ptr, ptr @sink, align 8
ret void
}
; CHECK-LABEL: define void @notcaptured1
; CHECK: __tsan_write
; CHECK: __tsan_write
; CHECK: ret void
define void @notcaptured2() nounwind uwtable sanitize_thread {
entry:
%ptr = alloca i32, align 4
%tmp = alloca ptr, align 8
store i32 42, ptr %ptr, align 4
; transitive escape
store ptr %ptr, ptr %tmp, align 8
%0 = load ptr, ptr %tmp, align 8
store ptr %0, ptr @sink, align 8
ret void
}
; CHECK-LABEL: define void @notcaptured2
; CHECK: __tsan_write
; CHECK: __tsan_write
; CHECK-NOT: __tsan_write
; CHECK: ret void
define void @notcaptured3(i1 %cond) nounwind uwtable sanitize_thread {
entry:
%stkobj = alloca [2 x i32], align 8
%derived = getelementptr inbounds i32, ptr %stkobj, i64 1
%ptr = select i1 %cond, ptr %derived, ptr %stkobj
store i32 42, ptr %ptr, align 4
ret void
}
; CHECK-LABEL: define void @notcaptured3
; CHECK-NOT: call void @__tsan_write4(ptr %ptr)
; CHECK: ret void
define void @notcaptured4() nounwind uwtable sanitize_thread {
entry:
%stkobj = alloca [10 x i8], align 1
br label %loop
exit:
ret void
loop:
%count = phi i32 [ 0, %entry ], [ %addone, %loop ]
%derived = phi ptr [ %stkobj, %entry ], [ %ptraddone, %loop ]
store i32 %count, ptr %derived, align 4
%ptraddone = getelementptr inbounds i32, ptr %derived, i64 1
%addone = add nuw nsw i32 %count, 1
%eq10 = icmp eq i32 %addone, 10
br i1 %eq10, label %exit, label %loop
}
; CHECK-LABEL: define void @notcaptured4
; CHECK: ret void
; CHECK-NOT: call void @__tsan_write4(ptr %derived)
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