mirror of
https://github.com/c64scene-ar/llvm-6502.git
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9e81c3bdb2
Remove the command line argument "struct-path-tbaa" since we should not depend on command line argument to decide which format the IR file is using. Instead, we check the first operand of the tbaa tag node, if it is a MDNode, we treat it as struct-path aware TBAA format, otherwise, we treat it as scalar TBAA format. When clang starts to use struct-path aware TBAA format no matter whether struct-path-tbaa is no, and we can auto-upgrade existing bc files, the support for scalar TBAA format can be dropped. Existing testing cases are updated to use the struct-path aware TBAA format. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191538 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 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 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 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 {
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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 = metadata !{metadata !"Simple C/C++ TBAA", null}
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!1 = metadata !{metadata !"vtable pointer", metadata !0}
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!2 = metadata !{metadata !1, metadata !1, i64 0}
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