[Clang][NFC] Added testcase from #49549arcpatch-D60031

The issue is fixed in trunk, so add testcase to avoid regression in the future.

1 files changed, 14 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/attr-likelihood.cpp b/clang/test/SemaCXX/attr-likelihood.cpp
index f7503fed49b9..642d62fa8982 100644
--- a/clang/test/SemaCXX/attr-likelihood.cpp
+++ b/clang/test/SemaCXX/attr-likelihood.cpp
@@ -159,4 +159,18 @@ constexpr int constexpr_function() {
   [[likely]] return 0;
 }
 static_assert(constexpr_function() == 0);
+
+constexpr double pow(double x, long long n) noexcept {
+    if (n > 0) [[likely]]
+        return x * pow(x, n - 1);
+    else [[unlikely]]
+        return 1;
+}
+constexpr long long fact(long long n) noexcept {
+    if (n > 1) [[likely]]
+        return n * fact(n - 1);
+    else [[unlikely]]
+        return 1;
+}
+
 #endif