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1ef70ff39b
Now that `Metadata` is typeless, reflect that in the assembly. These
are the matching assembly changes for the metadata/value split in
r223802.
- Only use the `metadata` type when referencing metadata from a call
intrinsic -- i.e., only when it's used as a `Value`.
- Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode`
when referencing it from call intrinsics.
So, assembly like this:
define @foo(i32 %v) {
call void @llvm.foo(metadata !{i32 %v}, metadata !0)
call void @llvm.foo(metadata !{i32 7}, metadata !0)
call void @llvm.foo(metadata !1, metadata !0)
call void @llvm.foo(metadata !3, metadata !0)
call void @llvm.foo(metadata !{metadata !3}, metadata !0)
ret void, !bar !2
}
!0 = metadata !{metadata !2}
!1 = metadata !{i32* @global}
!2 = metadata !{metadata !3}
!3 = metadata !{}
turns into this:
define @foo(i32 %v) {
call void @llvm.foo(metadata i32 %v, metadata !0)
call void @llvm.foo(metadata i32 7, metadata !0)
call void @llvm.foo(metadata i32* @global, metadata !0)
call void @llvm.foo(metadata !3, metadata !0)
call void @llvm.foo(metadata !{!3}, metadata !0)
ret void, !bar !2
}
!0 = !{!2}
!1 = !{i32* @global}
!2 = !{!3}
!3 = !{}
I wrote an upgrade script that handled almost all of the tests in llvm
and many of the tests in cfe (even handling many `CHECK` lines). I've
attached it (or will attach it in a moment if you're speedy) to PR21532
to help everyone update their out-of-tree testcases.
This is part of PR21532.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224257 91177308-0d34-0410-b5e6-96231b3b80d8
60 lines
1.8 KiB
LLVM
60 lines
1.8 KiB
LLVM
; RUN: opt < %s -tsan -S | FileCheck %s
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; Check that tsan does not instrument reads from constant globals.
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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"
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@const_global = external constant i32
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define i32 @read_from_const_global() nounwind uwtable sanitize_thread readnone {
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entry:
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%0 = load i32* @const_global, align 4
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ret i32 %0
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}
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; CHECK: define i32 @read_from_const_global
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; CHECK-NOT: __tsan
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; CHECK: ret i32
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@non_const_global = global i32 0, align 4
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define i32 @read_from_non_const_global() nounwind uwtable sanitize_thread readonly {
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entry:
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%0 = load i32* @non_const_global, align 4
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ret i32 %0
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}
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; CHECK: define i32 @read_from_non_const_global
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; CHECK: __tsan_read
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; CHECK: ret i32
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@const_global_array = external constant [10 x i32]
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define i32 @read_from_const_global_array(i32 %idx) nounwind uwtable sanitize_thread readnone {
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entry:
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%idxprom = sext i32 %idx to i64
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%arrayidx = getelementptr inbounds [10 x i32]* @const_global_array, i64 0, i64 %idxprom
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%0 = load i32* %arrayidx, align 4
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ret i32 %0
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}
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; CHECK: define i32 @read_from_const_global_array
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; CHECK-NOT: __tsan
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; CHECK: ret i32
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%struct.Foo = type { i32 (...)** }
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define void @call_virtual_func(%struct.Foo* %f) uwtable sanitize_thread {
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entry:
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%0 = bitcast %struct.Foo* %f to void (%struct.Foo*)***
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%vtable = load void (%struct.Foo*)*** %0, align 8, !tbaa !2
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%1 = load void (%struct.Foo*)** %vtable, align 8
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call void %1(%struct.Foo* %f)
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ret void
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}
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; CHECK: define void @call_virtual_func
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; CHECK: __tsan_vptr_read
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; CHECK: = load
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; CHECK-NOT: __tsan_read
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; CHECK: = load
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; CHECK: ret void
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!0 = !{!"Simple C/C++ TBAA", null}
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!1 = !{!"vtable pointer", !0}
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!2 = !{!1, !1, i64 0}
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