Vendor import of stripped compiler-rt trunk r375505, the last commitvendor/compiler-rt/compiler-rt-trunk-r375505vendor/compiler-rt

before the upstream Subversion repository was made read-only, and the
LLVM project migrated to GitHub:

https://llvm.org/svn/llvm-project/compiler-rt/trunk@375505

1 files changed, 20 insertions, 0 deletions

diff --git a/lib/tsan/benchmarks/func_entry_exit.cpp b/lib/tsan/benchmarks/func_entry_exit.cpp
new file mode 100644
index 000000000000..5e0ba1d6981b
--- /dev/null
+++ b/lib/tsan/benchmarks/func_entry_exit.cpp
@@ -0,0 +1,20 @@
+// Synthetic benchmark for __tsan_func_entry/exit (spends ~75% there).
+
+void foo(bool x);
+
+int main() {
+  volatile int kRepeat1 = 1 << 30;
+  const int kRepeat = kRepeat1;
+  for (int i = 0; i < kRepeat; i++)
+    foo(false);
+}
+
+__attribute__((noinline)) void bar(volatile bool x) {
+  if (x)
+    foo(x);
+}
+
+__attribute__((noinline)) void foo(bool x) {
+  if (__builtin_expect(x, false))
+    bar(x);
+}