derek.holloway
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62 lines
2.3 KiB
LLVM
62 lines
2.3 KiB
LLVM
; This test checks that we are not instrumenting unwanted acesses to globals:
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; - Instructions with the !nosanitize metadata (e.g. -fprofile-arcs instrumented counter accesses)
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; - Instruction profiler counter instrumentation has known intended races.
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;
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; RUN: opt < %s -passes='function(tsan),module(tsan-module)' -S | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.9"
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@__profc_test_gep = private global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
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@__profc_test_bitcast = private global [2 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
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@__profc_test_bitcast_foo = private global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
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@__llvm_gcov_ctr = internal global [1 x i64] zeroinitializer
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@__llvm_gcov_ctr.1 = internal global [1 x i64] zeroinitializer
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@__llvm_gcov_global_state_pred = internal global i32 0
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@__llvm_gcda_foo = internal global i32 0
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define i32 @test_gep() sanitize_thread {
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entry:
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%pgocount = load i64, ptr @__profc_test_gep, !nosanitize !0
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%0 = add i64 %pgocount, 1
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store i64 %0, ptr @__profc_test_gep, !nosanitize !0
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%gcovcount = load i64, ptr @__llvm_gcov_ctr, !nosanitize !0
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%1 = add i64 %gcovcount, 1
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store i64 %1, ptr @__llvm_gcov_ctr, !nosanitize !0
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%gcovcount.1 = load i64, ptr @__llvm_gcov_ctr.1, !nosanitize !0
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%2 = add i64 %gcovcount.1, 1
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store i64 %2, ptr @__llvm_gcov_ctr.1, !nosanitize !0
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ret i32 1
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}
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define i32 @test_bitcast() sanitize_thread {
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entry:
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%0 = load <2 x i64>, ptr @__profc_test_bitcast, align 8, !nosanitize !0
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%.promoted5 = load i64, ptr @__profc_test_bitcast_foo, align 8, !nosanitize !0
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%1 = add i64 %.promoted5, 10
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%2 = add <2 x i64> %0, <i64 1, i64 10>
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store <2 x i64> %2, ptr @__profc_test_bitcast, align 8, !nosanitize !0
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store i64 %1, ptr @__profc_test_bitcast_foo, align 8, !nosanitize !0
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ret i32 undef
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}
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define void @test_load() sanitize_thread {
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entry:
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%0 = load i32, ptr @__llvm_gcov_global_state_pred, !nosanitize !0
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store i32 1, ptr @__llvm_gcov_global_state_pred, !nosanitize !0
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%1 = load i32, ptr @__llvm_gcda_foo, !nosanitize !0
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store i32 1, ptr @__llvm_gcda_foo, !nosanitize !0
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ret void
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}
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!0 = !{}
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; CHECK-NOT: {{call void @__tsan_write}}
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; CHECK: __tsan_init
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