[tsan] Do not report errors in __destroy_helper_block_

There is a synchronization point between the reference count of a block dropping to zero and it's destruction, which TSan does not observe. Do not report errors in the compiler-emitted block destroy method and everything called from it.

This is similar to https://reviews.llvm.org/D25857

Differential Revision: https://reviews.llvm.org/D28387

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@291868 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 4 deletions

diff --git a/test/CodeGen/sanitize-thread-no-checking-at-run-time.m b/test/CodeGen/sanitize-thread-no-checking-at-run-time.m
index 098b7cf72f..3d862c0bf7 100644
--- a/test/CodeGen/sanitize-thread-no-checking-at-run-time.m
+++ b/test/CodeGen/sanitize-thread-no-checking-at-run-time.m
@@ -1,5 +1,7 @@
-// RUN: %clang_cc1 -triple x86_64-apple-darwin -x objective-c++ -emit-llvm -o - %s | FileCheck -check-prefix=WITHOUT %s
-// RUN: %clang_cc1 -triple x86_64-apple-darwin -x objective-c++ -emit-llvm -o - %s -fsanitize=thread | FileCheck -check-prefix=TSAN %s
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -x objective-c++ -fblocks -emit-llvm -o - %s | FileCheck -check-prefix=WITHOUT %s
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -x objective-c++ -fblocks -emit-llvm -o - %s -fsanitize=thread | FileCheck -check-prefix=TSAN %s
+
+// WITHOUT-NOT: "sanitize_thread_no_checking_at_run_time"
 
 __attribute__((objc_root_class))
 @interface NSObject
@@ -26,9 +28,14 @@ public:
 }
 @end
 
-// WITHOUT-NOT: "sanitize_thread_no_checking_at_run_time"
-
 // TSAN: initialize{{.*}}) [[ATTR:#[0-9]+]]
 // TSAN: dealloc{{.*}}) [[ATTR:#[0-9]+]]
 // TSAN: cxx_destruct{{.*}}) [[ATTR:#[0-9]+]]
+
+void test2(id x) {
+  extern void test2_helper(id (^)(void));
+  test2_helper(^{ return x; });
+// TSAN: define internal void @__destroy_helper_block_(i8*) [[ATTR:#[0-9]+]]
+}
+
 // TSAN: attributes [[ATTR]] = { noinline nounwind {{.*}} "sanitize_thread_no_checking_at_run_time" {{.*}} }