capture.ll
2.26 KB
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; RUN: opt < %s -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(i32*)
@sink = global i32* null, align 4
define void @captured0() nounwind uwtable sanitize_thread {
entry:
%ptr = alloca i32, align 4
; escapes due to call
call void @escape(i32* %ptr)
store i32 42, i32* %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 i32* %ptr, i32** @sink, align 8
store i32 42, i32* %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 i32*, align 8
; transitive escape
store i32* %ptr, i32** %tmp, align 8
%0 = load i32*, i32** %tmp, align 8
store i32* %0, i32** @sink, align 8
store i32 42, i32* %ptr, align 4
ret void
}
; CHECK-LABEL: define void @captured2
; 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, i32* %ptr, align 4
; escapes due to call
call void @escape(i32* %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, i32* %ptr, align 4
; escapes due to store into global
store i32* %ptr, i32** @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 i32*, align 8
store i32 42, i32* %ptr, align 4
; transitive escape
store i32* %ptr, i32** %tmp, align 8
%0 = load i32*, i32** %tmp, align 8
store i32* %0, i32** @sink, align 8
ret void
}
; CHECK-LABEL: define void @notcaptured2
; CHECK: __tsan_write
; CHECK: __tsan_write
; CHECK: ret void