1 // RUN: %clang -target x86_64-unknown-linux -fsanitize=thread %s -S -emit-llvm -o - | FileCheck %s 2 // RUN: %clang -O1 -target x86_64-unknown-linux -fsanitize=thread %s -S -emit-llvm -o - | FileCheck %s 3 // RUN: %clang -O2 -target x86_64-unknown-linux -fsanitize=thread %s -S -emit-llvm -o - | FileCheck %s 4 // RUN: %clang -O3 -target x86_64-unknown-linux -fsanitize=thread %s -S -emit-llvm -o - | FileCheck %s 5 // RUN: %clang -target x86_64-unknown-linux -fsanitize=thread %s -S -emit-llvm -o - | FileCheck %s 6 // Verify that -fsanitize=thread invokes tsan instrumentation. 7 8 int foo(int *a) { return *a; } 9 // CHECK: __tsan_init 10